News

1. Basic attributes Question: What are the main components and characteristics of permalloy? Answer: Permalloy is mainly composed of nickel and iron, usually the nickel content is between 40% and 80%. Its high magnetic permeability, low coercivity and high magnetic saturation make it excellent in magnetic applications.   Question: Why is the magnetic permeability of permalloy so important? Answer: Magnetic permeability is a measure of how easily a material is magnetized in a magnetic field. The high magnetic permeability of permalloy enables it to achieve high magnetization in relatively weak magnetic fields, making it suitable for various high-sensitivity magnetic equipment.   Question: What is coercive force, and what are the characteristics of permalloy’s coercive force? Answer: Coercive force refers to the reverse magnetic field strength required to demagnetize the material to zero. Permalloy's very low coercivity allows it to operate efficiently at low power conditions and is suitable for applications requiring frequent magnetization and demagnetization.   Question: How does the magnetic saturation of permalloy affect its application? Answer: Magnetic saturation refers to the ability of a material to reach the maximum magnetization intensity in a magnetic field. Permalloy's high magnetic saturation is suitable for applications requiring high magnetic field strengths, such as magnetic cores in transformers and motors.   2. Manufacturing process Question: What are the steps involved in the manufacturing process of permalloy? Answer: The manufacturing process of permalloy includes smelting and casting, heat treatment and cold working. Each step has a significant impact on the performance of the final product.   Question: What are the roles of smelting and casting in permalloy production? Answer: Smelting is to melt nickel, iron and other raw materials at high temperatures and mix them into alloys, while casting is to pour the molten alloy into a mold and cool it into shape. Temperature and ingredient ratios are strictly controlled to ensure the uniformity and purity of the alloy.   Question: How does heat treatment optimize the magnetic properties of permalloy? Answer: Heat treatment changes the internal structure of the alloy through the heating and cooling process and optimizes its magnetic properties. Annealing can eliminate internal stress, increase magnetic permeability and reduce coercive force; aging treatment increases the hardness and stability of the material.   Question: What effect does cold working have on permalloy? Answer: Cold working changes the shape and size of the material through mechanical methods, increasing its strength and toughness. Although cold working may induce internal stresses, these internal stresses can be eliminated by subsequent heat treatment.   3. Application fields Question: What are the applications of permalloy in electronic components? Answer: Permalloy is widely used in electronic components such as transformers, inductors and magnetic shielding materials. Its high magnetic permeability and low coercivity improve energy efficiency and measurement accuracy.   Question: Why is permalloy suitable for magnetic recording equipment? Answer: Permalloy’s high magnetic saturation and low coercivity enable high-density data storage and fast read and write speeds in tapes and hard drives.   Question: What are the applications of permalloy in communication equipment? Answer: Permalloy is used in communication equipment such as filters and antennas to reduce signal interference and improve the stability and clarity of signal transmission.   Question: How does permalloy play a role in the aerospace field? Answer: Permalloy is widely used in magnetic sensors and navigation equipment. Its high stability and environmental resistance enable it to maintain excellent performance under extreme conditions.   4. Advantages and limitations Question: What are the main advantages of permalloy? Answer: Permalloy has the advantages of high magnetic permeability, low coercivity and high magnetic saturation, making it excellent in high-performance magnetic applications.   Question: What are the limitations of permalloy? Answer: Permalloy has a higher cost, is easily oxidized, and requires additional protection in high-temperature environments. Its mechanical properties are somewhat lacking, limiting its use in certain mechanical applications.   5. Future development trends Question: What is the future research direction of permalloy? Answer: Future research will focus on improving the manufacturing process, optimizing the ingredient ratio, developing new materials and micro-machining technology to improve the performance of permalloy and reduce costs.   Question: How does the research on new materials affect the development of permalloy? Answer: By adding elements such as cobalt and chromium, the magnetic properties and stability of permalloy can be further optimized and its application scope expanded.   Question: What impact does micromachining technology have on the application of permalloy? Answer: The development of micromachining technology will make permalloy more widely used in microelectronic devices, such as micro sensors and MEMS equipment.   Question: How to improve the sustainability of permalloy? Answer: The development of low-energy-consuming, recyclable permalloy materials will help reduce the impact on the environment and achieve sustainable development.   Through an in-depth discussion of the basic properties, manufacturing processes, application fields, advantages and limitations, and future development trends of permalloy, we can better understand and utilize this important material to promote modern scientific and technological progress and industrial development. The key role of permalloy in the electronic field cannot be ignored. In the future, with the continuous innovation of technology and materials, its application prospects will be broader.

When choosing a current transformer manufacturer, you can consider the following aspects:   Manufacturer strength: including production scale, technical level, product quality, after-sales service and so on. The strength of the manufacturer can be assessed by examining the manufacturer's qualifications, honours and certificates, user reviews and so on.   Quality of current transformers: you can assess the quality of current transformers by understanding the quality assurance system of the product, materials and processes.   Manufacturer's service level: including pre-sales consulting, after-sales service, etc., a good level of service can ensure the effectiveness of the product and long-term stability.   Price: on the basis of meeting the above conditions, you can consider the price factor and choose cost-effective products.   Hemei Electronics is a leading manufacturer of electromagnetic signal coupling, is the domestic design and manufacture of magneto-electric power conversion technology, has been committed to promoting the progress of signal coupling technology and passive power technology. We mainly produce magnetic cores, Permalloy cores, amorphous cores, silicon steel cores, passive power supply (CT pick-up) devices, ultra-high-precision AC measurement sensors, magnetic shielding boxes and so on. We have accumulated a large number of engineering applications in electric power, high-speed railway, intelligent mines, civil airport, energy consumption monitoring, metallurgy, wharf and so on.   If you have current transformer and other products need, welcome to contact us at any time.   Read more: https://www.hemeielectricpower.com/

The footsteps of spring are coming quietly, and the spring rain is coming like a poem and a picture. At this moment, the "big battle" for maintenance of Shaanxi Coal Shimen Booster Station is quietly going on. The booster station is an important part of the power system. The maintenance work of the booster station is a delicate and complex project. The quality and efficiency of its maintenance work are directly related to the safe and stable operation of the entire power grid. Therefore, the maintenance of the booster station is not only a technical competition, but also a comprehensive test of teamwork, safety management and technological innovation capabilities.   The work content of 610 interval maintenance and 650 interval maintenance is similar. In addition to the conventional circuit breaker inspection, electrical test, gas density relay calibration, and transmission test, this year's maintenance plan also includes the replacement of current transformers. This is not only a technical job, but also a battle with risks. The replacement of current transformers is a very complicated task, involving multiple high-risk operations such as high-altitude operations, lifting operations, and outsourcing operations. Every step needs to be done carefully and there is no room for error. The peripheral equipment is all running at 220kv power, and the safety regulations clearly stipulate that the safety distance of 220kv equipment is 3 meters. These 3 meters have become an invisible "barrier", limiting the working space and testing professional skills.   During the hoisting process of the current transformer, the crane's rotation radius control needs to be very precise to ensure a safe distance from the live parts, ensure the safety of the workers, and ensure that the transformer porcelain bottle is not damaged. The pressure and responsibility involved are self-evident. . However, time seems not to be on our side. The maintenance schedule of the entire booster station is tight, and every day's work must be planned in advance, and relevant personnel and equipment must be contacted and deployed in advance. What adds to the challenge is that often when I go out, the sun is still shining brightly, and in a blink of an eye, dark clouds cover the sky, and huge raindrops hit the ground. How many times have maintenance workers had to withdraw from the booster station and wait for the rain to stop before continuing the fight? But even so, we have never given up our efforts to compete with God for time. Every time we pause, we are confirming the spare parts to be used and the presence of relevant staff.   This year’s work also included flaw detection of the porcelain bottles supporting the insulators of the isolating switch of the 220kV booster station, cleaning and inspection of the suspension insulators, and inspection of the corrosion of the gantry frame. These are countermeasures and safety assessment projects, which need to be carried out by contacting the testers of the Provincial Electric Power Research Institute and the operators of Changde Electric Power.   After completing the maintenance work related to the 610 bay and the 650 bay, all members of the second electrical shift immediately entered into the 220kV II busbar maintenance pre-test. It mainly includes non-destructive testing of pillar porcelain bottles, inspection and replacement of pillar porcelain bottle connecting bolts, 220kVII bus metal frame anti-corrosion, 220kV II bus voltage transformer and arrester maintenance pre-test, porcelain bottle non-destructive testing, 220kV booster station Shimeng II line 606 circuit breaker, 6063 isolating switch, 606 circuit breaker current transformer, Shimeng II line CVT preventive test and porcelain bottle cleaning and flaw detection, 6062 isolating switch replacement, 220kV II bus voltage transformer replacement, 606 circuit breaker interval suspension insulator cleaning and insulator inspection work. Among them, the most difficult and risky ones are the replacement of the 6062 isolation switch and the replacement of the 220kV II bus voltage transformer.   In view of the extremely tight time limit, the company's electrical second shift staff urgently carried out these two high-risk tasks involving high-altitude operations, lifting operations, and outsourcing operations at the same time. At the same time, personnel were seriously nervous, and other maintenance projects were suspended, and all efforts were made to ensure that these two key tasks could be completed smoothly and safely. After reasonable planning of the construction period, the scaffolding was set up during off-duty hours to ensure that working hours were fully utilized. The troops were divided into two groups, each with a person in charge to coordinate the equipment and equipment related to lifting, testing, transportation, etc. The time for personnel to enter the site ensures that the work processes on both sides proceed smoothly and the nodes do not conflict with each other. Time seems to have been pressed on the "acceleration button", and everyone is working hard. In such a working atmosphere, everyone seems to have been ignited with a fire, burning with passion and driving forward. Everyone sweats here, gains growth, and writes their own wonderful chapter with enthusiasm and hard work.   Read more:  https://www.hemeielectricpower.com/

The May Day holiday, known as International Labor Day, is of great significance in China as it celebrates and honors hard-working workers. This special occasion gives employees a well-deserved break from their busy schedules, allowing them to relax and rejuvenate. During this wonderful holiday period, if you need any help or have questions about our services, our professional team is here to answer your questions.   May 1st, a day to commemorate the contributions of workers across the country, is indeed a day to combine work and rest. It marks the harmonious blend of work and play, emphasizing the importance of maintaining a healthy work-life balance. As we mark this special day, let us not forget the importance of striking a balance between work and leisure. Research shows that a well-rested mind is more productive and creative. So take this opportunity to relax, recharge and explore the world around you.   Whether it’s a weekend getaway or a simple walk in nature, immerse yourself in the beauty of life. From picturesque landscapes to cultural wonders, the world is filled with endless possibilities waiting to be discovered.   As you embark on your well-earned vacation, I hope you find joy, relaxation, and adventure every step of the way. Explore new horizons, indulge in delicious food and create memories that will last a lifetime. Let this holiday season be a time of rejuvenation and renewal for your body, mind, and spirit.   When the holidays are over and responsibility calls your name, may you come back with enthusiasm and a fresh perspective. Let the memories of your adventures fuel your passion and ignite your drive to conquer new milestones. Remember, the secret to success is not only hard work and dedication, but also allowing yourself moments of self-care and rejuvenation. So make the most of this precious time and return to work with a renewed sense of purpose and energy.   Say goodbye to the holidays and let’s embrace the challenges and opportunities ahead. Let us strive for greatness, knowing that we nurture our souls and minds during this break.   I wish you a vibrant and fulfilling Labor Day filled with laughter, joy and unforgettable experiences. May your heart be light, your spirits high, and your dreams within reach. Cheers to the incredible journey ahead!   Also remember that our team is always on hand, ready to respond to your inquiries and assist you in every possible way. Enjoy your vacation and relax knowing your questions will be answered promptly and professionally.   Happy Labor Day!   Read more：https://www.hemeielectricpower.com/

A few days ago, a number of securities, capital and other companies released their latest research information: the flying car industry has formed a consensus, which will affect the development of the amorphous alloy industry.   One of the basis is starting from this news—— Not long ago, the world's first manned flying car: the world's first intelligent manned flying car for urban traffic, developed by the team of Academician Li Jun of the School of Vehicles and Transportation of Tsinghua University, successfully made a test flight in Xi'an, and the motor it was equipped with was also an amorphous motor.   As a necessary route for flying cars from 0 to 1, we can be sure that amorphous motors will become the track with the most certain investment opportunities in the low-altitude economic trillion-dollar incremental market!   Amorphous motors increase battery life by 20% and are the inevitable choice for flying cars. Reviewing the bull market of new energy vehicles from 2018 to 2022, it can be clearly found that battery density and materials that solve the problem of battery life are the core factors driving the increase in the penetration rate of new energy vehicles. In addition, compared with the several-fold increase of host manufacturers, the battery CATL, which focuses on improving battery life, and the lithium mines Tianqi and Ganfeng have increased by as much as thirty or forty times!   On flying cars, the battery life problem is even more serious! EHang E216 flying car has a range of 40 kilometers; Airbus CityAirbus NextGen flying car has a range of only 70 kilometers. In flying cars, the most important factor restricting battery life is motor energy consumption. If motor energy consumption accounts for 60% to 70% of industrial energy consumption, most of the energy consumption of flying cars is generated in the motor.   According to ROI electric drive data, compared with traditional motors, the efficiency of amorphous motors can be increased by 20%, and copper losses and iron losses at high frequencies can be reduced by 60-90%, greatly improving motor efficiency. Take the amorphous motor carried by Xiaopeng as an example. By replacing the traditional motor with an amorphous motor, the efficiency is increased by 30% and the battery life is increased by 20%! This means that, taking a flying car with a range of 100KM as an example, using an amorphous motor will increase the range to 120KM.   Battery life is currently the biggest improvement bottleneck faced by flying cars. The use of amorphous motors will greatly enhance product competitiveness and is a must-choice for flying cars!   The consensus among investment banks and capital markets is that amorphous motors will be one of the core technologies of flying car companies and the key to growing the flying car market.   In this current trend, amorphous motors are fluttering and ready to fly!   According to information from the Amorphous China Big Data Center: This year, amorphous motors across the country have continued to show a hot trend. In addition to the low-altitude economy, the demand for amorphous alloy motors in new energy vehicles, AI large models, etc. has increased sharply. According to preliminary estimates, This year, the demand for amorphous motors of various types and specifications exceeds one million units.   However, orders from domestic amorphous motor core manufacturing companies are already full, which makes the amorphous alloy industry happy on the surface but actually troubled: Facing the huge market, it has more ideas; being dubbed "new quality productivity", more often than not it is "intentional" But it can’t be used.”   We know that the amorphous motor industry is a systematic project. It is a comprehensive system that combines metallurgy, materials, design, processing and market factors. It requires the coordination of policies, industries, scientific research units, enterprises and demand to make "materials become materials, materials can be transformed into devices, and devices can be put on the market." The Second National Amorphous Motor Seminar held in Yancheng, Jiangsu Province on May 16 set up such a platform to explore the market and technology, inviting domestic and foreign research units and well-known industry experts to talk about processing, applications and trends.   Read more:  https://www.hemeielectricpower.com/

From April 12 to 15, the 2024 Fifth Spring Academic Conference on Amorphous Physics and Materials was held at the Yangtze River Delta Physics Research Center in Liyang, Jiangsu.   This conference is jointly sponsored by the Amorphous Physics Committee of the Chinese Physical Society and the Institute of Physics of the Chinese Academy of Sciences, and hosted by the Yangtze River Delta Physics Research Center. The conference will set up a main venue and three sub-venues focusing on basic academic research, applied exploration research, and cross-industry needs. Academician Wang Weihua's report was titled "Opportunities and Challenges in the Application of Amorphous Alloys", which focused on introducing new applications and new directions of amorphous alloys in terms of high-frequency soft magnetism, bulk amorphous (3C), catalysis and welding materials. Wang Weihua said that amorphous/nanocrystalline is the soft magnetic material with the most beneficial comprehensive performance under high-frequency conditions. It has a wide range of application prospects and will generate an industry worth hundreds of billions of yuan in the next 5-10 years; bulk amorphous is used in folding screens There are practical applications in mobile phone hinges, high-end watch cases, flexible gears, and space mirrors, and the application fields need to be further expanded; catalysis and welding, as application directions that started early and have little research, will face more opportunities in the future. Domestic representative amorphous/nanocrystalline companies have independently innovated, and some fields have achieved a leap from following to leading on a global scale.   Academician Liu Riping's report was titled "Metastable Academic Ideas and Development of New Materials". He said that in recent years, using the perspective of metastable materials to rethink important scientific and technical issues related to traditional materials has gradually become a new growth point in the materials discipline. Academician Liu focused on the work achievements of the State Key Laboratory of Metastable Materials Preparation Technology and Science in recent years, and successively introduced the "Synthesis of Nano-Twinned Superhard Diamond" by Tian Yongjun's team and "New Materials for High-speed and Heavy-Duty Railway Frogs" by Zhang Fucheng's team. "New Materials and Rail Integration New Technology" and his own team's "lightweight (low-density) steel development" and other major achievements. These achievements have very broad engineering application prospects, contribute to "Made in China", and are expected to break foreign monopolies in some fields.   This conference aims to provide a platform for in-depth academic exchanges and industrial cooperation for outstanding scholars and entrepreneurs in the field of amorphous physics and materials, promote the integration of industry-university-research cooperation, promote the diversified cross-integration of disciplines, applications, and industrialization, and discuss Cutting-edge technologies and future development directions of amorphous physics and materials, focusing on the connection between technology supply and market demand, using demand to drive the research and development and transformation of scientific and technological achievements, especially in industries such as new energy, precision medicine and health, and intelligent manufacturing, to achieve non-stop The disciplines of crystalline physics and materials have developed by leaps and bounds. More than 500 representatives from relevant universities, research institutes, well-known enterprises and other units across the country participated. The Secretariat of the Amorphous Alloy Materials Application Branch of the China Electrical Equipment Industry Association organized a group to attend the conference to study and conduct industry-university-research collaboration.   This conference is the fifth conference following the 2018 Anhui Jingde Conference, the 2019 Shenzhen Conference, the 2021 Nanjing Conference and the 2023 Dongguan Conference.   Read more:  https://www.hemeielectricpower.com/

Recently, at the Shanxi Shuozhou Shentou switching station-Yantong double-circuit line project site that was connected to the 500 kV line from the 1,000 kV substation in northern Shanxi, Shanxi's 500 kV and above transmission line projects used drone AI for independent acceptance for the first time.   "Traditional quality acceptance is mainly based on manual tower inspection and ground instrument measurement. It is easily affected by terrain, weather, measurement angle, etc., and has visual blind spots, which affects the acceptance effect." The relevant person in charge of the Shanxi Construction Branch of State Grid said , this innovative acceptance uses drone RTK + front-end AI visual navigation, automatic target tracking and locking, adaptive zoom shooting and other technologies. Compared with traditional RTK flight shooting, this innovative acceptance has the full automatic shooting of key parts and a pixel increase of more than 10 times. , automatic data classification management after the job is completed and other advantages. The data formed by AI automatic acceptance can provide data processing personnel with an immersive sensory experience and make it easier to detect minor defects.   This drone inspection captured the real-time installation status of transmission line towers, fittings, insulator strings and other parts, and accurately scanned the distance between ground wires, tree growth in line corridors, geographical environment, crossings and other conditions. These photos will be included in the project acceptance report and digital archives, and will be accumulated and improved to form a typical project defect database, providing the most comprehensive and basic original data for the reliable operation of the power grid, and at the same time providing guarantee for the "zero-defect" operation of the project.   In the next step, the company will further explore the data value of the standardized acceptance typical defect database, use typical neural networks to achieve autonomous classification and identification of collected images, automatically identify and alarm power grid engineering defects and form reports, and promptly report them to construction, supervision and construction personnel. , operation and other participating parties push information to realize process management of defect identification, information reminders, defect rectification reporting, and rectification confirmation, and realize digital and intelligent transformation in the field of power grid infrastructure.   Read more:  https://www.hemeielectricpower.com/

As the Qingming Festival approaches, the time for employees return to their hometown for spring outings and ancestral worship arrived.As the Qingming Festival approaches, the employees of Hemei Electronics eagerly anticipate the holiday to pay homage to their ancestors and enjoy the refreshing outdoor activities.The arrival of the Qingming Festival signifies both a time of remembrance and a celebration of nature's awakening. It is a cherished tradition for Hemei Electronics' staff to journey back to their hometowns, honoring their forefathers and embracing the beauty of spring. The serene atmosphere, coupled with the fragrance of blooming flowers, fills the air with a sense of tranquility and nostalgia. With hearts filled with reverence and gratitude, the employees embark on this annual pilgrimage, traveling to the rural villages where their ancestors rest. The vibrant green of the countryside revitalizes their spirits, providing a welcomed respite from the fast-paced urban lifestyle. Amidst sweeping landscapes of rolling hills and winding rivers, they find solace and connect with their roots, carrying on the traditions passed down through generations.The Qingming Festival is not only a time for paying respects, but also an opportunity for the employees of Hemei Electronics to bond with their families and loved ones. Together, they embark on leisurely strolls through picturesque countryside, taking in the delightful symphony of chirping birds and rustling leaves. Laughter and joy reverberate through the valleys as children race along the meandering paths, cherishing the moments spent with their elders.As the sun casts its golden glow, signaling the end of the day's activities, the employees gather around the ancestral gravesites to offer prayers and burn incense. In this solemn yet serene atmosphere, they reflect upon their roots, expressing gratitude for the wisdom and hardships endured by their ancestors. It is a time for contemplation and introspection, a reminder of the preciousness of life and the importance of cherishing our heritage.The Qingming Festival shines a light on the importance of honoring our past while embracing the bounties of the present. Hemei Electronics' employees seize this occasion to strengthen the bonds of family, to rejuvenate their spirits in the embrace of nature, and to embody the values instilled in them by their ancestors.In this time of remembrance and togetherness, Hemei Electronics wishes everyone a joyous and meaningful Qingming Festival, filled with love, gratitude, and a deep connection to our roots. Read more： https://www.hemeielectricpower.com/

Collaboration, innovation, breakthrough - green development, dreaming of the deep blue. 27 January, hosted by China Power Science and Technology Network, co-organised by the China Energy Research Society Marine Energy Professional Committee, "offshore wind power construction and operation and maintenance of innovative technology development forum" was held in Tsinghua Sanya International Forum. International Forum was grandly held.   Li Huajun, academician of the Chinese Academy of Engineering, Lian Jijian, president of Tianjin Polytechnic University, served as the chairman of the forum, and 26 experts from power grids, wind power companies, research institutes, colleges and universities, and other guests to discuss the opportunities and challenges faced by the development of offshore wind power, and the exchange of technological and industrial innovation results, to help the industry develop in a healthy and sustainable manner.   In the context of the green low-carbon era, the global energy structure reshaping, offshore wind power has become an important hand to promote energy transformation in China. China's offshore wind resources are very rich, 50m water depth or so can be developed offshore wind power more than 500 million kW, offshore photovoltaic more than 1 billion kW, the industry scale up to 10 trillion yuan, the development potential is huge. Forum based on "synergy, innovation, breakthrough - green development, dreaming of the deep blue" theme, around the "offshore wind power development trend and prospect analysis", "Offshore wind power construction key equipment and technology", "floating photovoltaic new structure and fixed photovoltaic structure", "wind and storage multi-energy complementary system key issues", "Marine Energy Economy Development and Construction" and other topics were discussed.         The forum not only follows the past, setting up a number of "expert Q&A and in-depth exchange" sessions, but also adds a "roundtable forum", where experts express their views on a topic and share their opinions in multiple dimensions, so that the guests can understand the topic more comprehensively and form a consensus.   Technology empowerment, and scenery counterparts. Forum to build a communication platform, through speeches, Q&A, communication, the establishment of a collaborative mechanism, convergence of advantageous resources, incubation of innovative achievements, with practical action to lead and promote the high-quality development of marine energy.   Learn more about power news： https://www.hemeielectricpower.com/

On 15 March, State Grid Corporation of China Limited Shanbei-Anhui ± 800 kV UHV DC Transmission Project and Yuexi Pumped Storage Power Station (hereinafter referred to as "Shaanbei-Anhui UHV Project" and "Yuexi Pumped Storage Power Station") commenced construction. ") were started. The commencement of construction of the two projects is of great significance to ensure the safe and reliable supply of electricity in China, accelerate the construction of a new type of energy system, realise the goal of carbon peak and carbon neutrality, and promote high-quality development.   It is reported that Shaanxi - Anhui UHV project rated voltage ± 800 kV, rated capacity of 8 million kilowatts, dynamic investment of 20.5 billion yuan. The project starts from Baotashan converter station in Yan'an City, Shaanxi Province, and ends at Hezhou converter station in Hefei City, Anhui Province, passing through Shaanxi, Henan and Anhui Provinces, with a total length of 1,069 kilometres of DC lines. The sending end will gather photovoltaic, wind power and energy-saving thermal power from Shaanxi with 750kV AC system, and the receiving end will be connected to the load centre of Anhui. Yuexi Pumping and Storage Power Station is located in the territory of Huangwei Town, Yuexi County, Anhui Province, installing four 300,000 kW reversible units, with two 500 kV outlets to access the East China Power Grid, with a dynamic investment of 7.5 billion yuan. After the two projects are completed and put into operation, it can improve the power surplus and shortage mutual aid, time and space complementary, multi-energy interchangeability, achieve a wider optimal allocation of electric power resources, better guarantee the safe and stable operation of the power grid, and effectively help the construction of the national unified big market and modern infrastructure system, and promote the urban and rural and regional co-ordinated development. Shaanbei-Anhui extra-high voltage project, Yuexi pumped storage power station two projects started construction, is to promote the green transformation of energy, service carbon peak carbon neutral goal of the important deployment. Shaanbei-Anhui UHV project send end access supporting new energy 11 million kilowatts, can promote the large-scale development and utilisation of clean energy in Shaanxi, optimise the structure of energy supply in Anhui, and enhance the proportion of green power consumption. The construction of Yuexi pumped storage power station will serve the construction of Anhui intelligent and green manufacturing province and help Anhui to build a 10 million kilowatt green energy storage base in Yangtze River Delta. After the two projects are put into operation, it can promote new energy power consumption of more than 18 billion kWh per year, replace coal consumption of 6.3 million tonnes, reduce carbon dioxide emissions of 16.6 million tonnes, with significant energy saving and emission reduction benefits. At present, State Grid has completed a total of 35 UHV projects, and the network structure in the operation area is constantly optimised, providing strong network support for the development of various types of clean energy, and playing an important role in guaranteeing the safe and reliable supply of electric power, and promoting green and low-carbon development.   Read more:  https://www.hemeielectricpower.com/

International Women's Day is just around the corner, and the atmosphere at our company is buzzing with excitement. The 8th of March is a day we eagerly look forward to, as it allows us to celebrate and appreciate the remarkable women who contribute their talents and hard work to our organization. Each and every female member of our team was greeted with a stunning bouquet of flowers, symbolizing the elegance and grace they bring to the workplace. The delicate petals intertwined, creating an enchanting display of femininity and resilience. But the festivities didn't stop there. The aroma of freshly brewed tea filled the air as delicious and refreshing milk teas were presented to the deserving ladies.  The entire workforce radiated joy and camaraderie, united in the celebration of womanhood. Laughter echoed through the corridors, blending harmoniously with the hum of productivity. Happy conversations filled every corner, as colleagues shared stories of empowerment, achievements, and dreams for the future. This momentous occasion served as a gentle reminder of the immense contributions women make in all spheres of life. It showcased the power of unity and recognition, reminding us that true success lies in embracing diversity and empowering one another.

With the continuous development of science and technology and the continuous expansion of human activities, microelectronics technology, computer technology is applied to all aspects of social life, a large number of high technology content, complex internal structure of electrical and electronic products are widely used, so that it is increasingly informatization and electromagnetic sensitivity. The influence of complex electromagnetic environment on human beings has attracted more and more people's attention. Therefore, it is of great significance to study the coupling mechanism of electromagnetism.   I. Concept of electromagnetic environment 　　Electromagnetic environment refers to the sum of electromagnetic phenomena existing in space. A variety of man-made electromagnetic radiation and natural electromagnetic radiation constitute a complex electromagnetic environment, in which man-made electromagnetic radiation, including mobile phones, radio conversational machines, radio and television transmitters, satellites, radar, etc., lightning, static electricity, geomagnetic field, sunspot activity, cosmic rays, etc., constitute a natural source of electromagnetic radiation. 　　The formation of electromagnetic radiation effects requires the simultaneous presence of the following three elements: 　　Electromagnetic wave source, refers to the components, equipment, systems or natural phenomena that generate electromagnetic waves; 　　A coupling channel, meaning a channel or medium that couples or propagates energy from a wave source to a sensitive device and causes that device to respond; 　　Sensitive device, a device that responds to electromagnetic waves. 　　These three elements are usually referred to as the three elements of electromagnetic coupling.   Ⅱ. The coupling mode of electromagnetic radiation 　　(A) antenna coupling 　　All exposed to the electromagnetic field of the metal conductor can be considered as an antenna, "front door" coupling ("front-door" coupling) means that the electromagnetic pulse or microwave energy through the target on the antenna coupled to the electronic system. Therefore, according to the design characteristics of the antenna to calculate the coupling strength, when the electromagnetic wave frequency and antenna design frequency is equal, the coupling reaches the peak. 　　(B) hole and seam coupling 　　Generally, electronic equipment is encapsulated in a container composed of conducting material. Due to equipment cooling and ventilation, notches, cracks, and feed, signal transmission needs, the container can not be sealed, there are different types of holes and seams, which provides a coupling pathway for electromagnetic radiation. "Back-door" coupling ("back-door" coupling) is a high-energy electromagnetic pulse energy through the target on the hole, gap coupling into the system, interference or destruction of electronic equipment. When the wavelength is smaller than the size of the holes, electromagnetic waves will enter the shielding body without obstruction; when the wavelength is larger than the size of the holes, electromagnetic waves will be blocked; when there is the size and length of the electromagnetic wave comparable to the holes, electromagnetic wave coupling is very serious, will produce resonance. 　　(C) power line, transmission line coupling 　　Power line is exposed to the system outside the long line, vulnerable to electromagnetic energy attack, both to receive interference energy can also transmit interference energy. If there is a power line or signal transmission line from the shielding shell connected to the inside of the system, the received, induced current will propagate along the line into the shielding body. The general propagation is microwave pulse current, even if the current is not introduced from the lead of the transmission cable core, but is induced on the outer shield, through the transfer impedance will also be coupled to the core, directly into the electronic system. For microwave, shielded cable transfer impedance is also much larger than the RF, so microwave can be through the power line, the braided shield of the transmission line into the core. 　　(D) the skin effect of metal shells 　　Electromagnetic wave penetration of the metal shell is realized through the skin effect, electromagnetic waves in the material skinning depth as follows 　　Where f is the frequency of the electromagnetic wave, and respectively for the magnetic permeability and electrical conductivity of the metal shell material. For 2GHz microwave signals, it is in the copper (=5.5 × 107S/m) and aluminum (=3.2 × 107S/m) in the skinning depth of 1.52 and 2.82. For higher frequency microwave signals, the value of the skinning depth is smaller.   Ⅲ. the role of electromagnetic energy mechanism 　　Electromagnetic hazards on the impact of high-tech equipment, mainly through the energy of conduction coupling, radiation coupling occurs, the role of the mechanism can be summarized as follows four aspects: 　　(A) thermal effect 　　Electrostatic discharge and high-power electromagnetic pulse generated by the thermal effect is generally completed in nanoseconds or microseconds, is an adiabatic process. As an ignition source and detonation source, instantly cause flammable, explosive gas or electrical fireworks explosion, but also can make the system of microelectronic devices, electromagnetic sensitive circuits overheating, resulting in localized thermal damage, circuit performance deterioration or failure, and even lead to the stockpile of material combustion and explosion. 　　(B) radio frequency interference and "surge" effect 　　Electromagnetic radiation caused by radio frequency interference, information technology equipment caused by electrical noise, electromagnetic interference, so that it produces false action or functional failure. Strong electromagnetic pulse and its "surge" effect on the system will also cause hard damage, not only can make the device or the performance parameters of the circuit deterioration or failure, but also the formation of cumulative effects, buried potential hazards, so that the circuit or the use of equipment to reduce. 　　(C) strong electric field effect 　　Electromagnetic hazards generated by the strong electric field (especially static field) can not only make the MOS circuit gate oxide layer breakdown or intermetallic dielectric breakdown, resulting in circuit failure, but also the formation of potential damage to the system self-testing instrumentation and sensitive devices affect the work. 　　(D) magnetic effect 　　Electrostatic discharge, lightning strikes, lightning and similar electromagnetic pulse caused by strong currents can produce a strong magnetic field, so that the electromagnetic energy is directly coupled to the internal system, interfering with the normal operation of electronic equipment.   　　References: 　　[1] Liu Shanghe, Wu Zhancheng:Electromagnetic environment and high-tech weaponry[J]. Modern Military,2001. 　　[2] Wu Xiong:Environmental Problems of Electric, Magnetic and Electromagnetic Fields[J]. Electric Power Environmental Protection,2007,(4). 　　[3] Gao Yan and Yu Bo: Characteristics of Complex Electromagnetic Environment[J]. Sichuan Journal of Military Engineering,2008,(1). 　　[4] Gao Bin, Tang Xiaobin: Complex Electromagnetic Environment Effects[J]. Journal of China Academy of Electronic Science,2008,(4).