The overall development trend of China's power capacitor industry

      With the rapid development of my country's national economy and power industry, the power capacitor industry will face the following development trends:

      (1) The technical level of power capacitors will be further improved. Power capacitors are the core of reactive power compensation devices. In recent years, manufacturing technology has been greatly improved, but there is still a big gap with foreign advanced technology, mainly raw materials (especially thin-film dielectric materials), process equipment and management systems, etc. Caused by aspects. To narrow this gap, for example, setting the goal in the past two years as the single-unit capacity of the leading product is 500kvar and the specificity is 0.15g/kvar~0.2kg/kvar, it is necessary to improve advanced technology and equipment, and at the same time make a breakthrough in system reform. Although foreign companies have a wide variety of products, they are manufactured in specialized factories of large enterprise groups. Specialization improves product quality and speeds up technological upgrading. Therefore, the reform of enterprise mechanism is the foundation of technological progress.

      (2) Products are developing towards high reliability, oil-free and environmental adaptability. It is very important to choose the internal fuse, external fuse and non-fuse structure reasonably. From the perspective of oil-free, self-healing high-voltage capacitors and gas-filled collective capacitors are all controllable options. All this is based on safety and reliability.

      (3) Vigorously develop new filtering, static compensation and series compensation devices. Due to the application of power electronic devices, the harmonic pollution in the power grid has become more and more serious, and it is very necessary to develop economical, applicable and funny passive and active filters. At present, domestic static compensation devices are mainly used in metallurgical enterprises, and advanced static compensation devices must be vigorously developed in the power system to replace the old-fashioned tuning camera group with high operating costs and increase the operating stability of the system. The series compensation device includes fixed series compensation and controllable series compensation. At present, mainly relying on imports and realizing the localization of the series compensation device as soon as possible are important measures to increase transmission capacity and ensure system stability.

      (4) Localization of a full range of power capacitors for DC transmission. China has successfully operated 5 ultra-high voltage DC lines, and power capacitors are one of the important equipment. In DC converter stations, 9 different types of power capacitors have been applied. Among them, the parallel capacitors have been domestically produced. The capacity is still in the stage of small batch trial operation, mainly relying on imports. Therefore, it is imperative to realize the localization of the entire variety of DC transmission capacitors, especially the localization of AC and DC filter capacitors, and strive to reach or approach the advanced level of foreign countries.

      (5) Accelerate scientific research and development, and promote the application of reactive power compensation device technology. Strengthen the technical exchanges of various AC reactive power compensation devices, complete sets of filtering devices for AC and DC transmission, and SVCs for metallurgical industries, pay close attention to the formulation and revision of relevant standards for reactive power compensation devices, and improve the manufacturing technology of reactive power compensation devices Actively carry out academic exchanges and lectures on reactive power compensation technology, and further promote the manufacturing and application level of low-voltage reactive power compensation devices.