Key technologies for the design and manufacturing of high voltage surge arresters.
At present, high-voltage arrester products are being developed at home and abroad. In the research and development of arresters, there are many key technologies that require a series of basic research.
Lightning arrester manufacturer
include:
Research on the insulation coordination and protection characteristics of high-voltage arresters and systems. As ultra-high voltage projects have increasingly higher requirements for power equipment, some equipment manufacturing capabilities can no longer meet engineering needs. Through research on the insulation coordination and protection performance of the system, a reasonable protection level is proposed to reduce the project cost and reduce the difficulty of equipment manufacturing.
Research on the formula and process of high-performance, high-capacity DC resistors. As the core component of a high-voltage arrester, its electrical performance directly affects the protection level of the arrester. Through research on the formula and process of DC resistors, while reducing the size of the resistor, it also improves the current flow capacity, potential gradient and other indicators, and reduces the size of the resistor sheet.
High voltage lightning arrester dirt performance. The fouling capacity of high-voltage arresters in DC electric fields is much greater than that in AC electric fields. Therefore, the method of increasing the creepage distance is used in product design to improve the anti-pollution flashover level. The study of the pollution characteristics of high-voltage arresters provides a basis for the design and testing of lightning protection devices.It is the energy distribution and parallel connection technology of high voltage arresters. In order to meet the high-energy energy absorption requirements of arresters in HVDC converter stations and to reduce the insulation level of protected equipment, many HVDC converter stations must adopt a multi-column parallel structure. Multi-column parallel structure Due to the multi-column parallel structure, energy distribution is the key to the stable operation of the multi-column parallel structure arrester.
Metal oxide arrester
Study on the aging problem of insulation materials in DC electric field. Under the action of DC electric field, insulating materials will undergo ion migration. The degree of ion migration is related to the content of alkali metal ions such as potassium and sodium in the insulating material. When used for extended periods of time, it will affect the insulation properties of the material. In order to understand and examine the degradation of insulating materials in DC electric fields, ion migration experiments were performed on the insulating materials used. Conduct analysis and research based on the test data to determine the insulation material of the high-voltage arrester.It is the structural design and optimization of high-voltage lines. Since there are many types of arresters in DC projects, the selected jacket options include porcelain coated arresters and jacket combination arresters, and the installation methods include hanging installation, seated installation, and external connection in parallel structure. Therefore, for high-voltage arrester models at different locations, all factors must be considered comprehensively, and then structural optimization design must be carried out. Through the combination of parametric design calculation and actual measurement, potential distribution, energy distribution, etc. are realized.
Gapless metal oxide high-voltage arresters have more than 20 years of practical experience in DC transmission projects that have been put into use in my country, involving the use of various arresters in DC projects. Currently in operation are 4-500kV high-voltage pole bus arresters, bridge valve arresters, neutral bus arresters, etc. This shows that China has mastered the basic technology of high-voltage arresters. When developing high-voltage arresters, comprehensive research has been conducted on various key technologies such as high-performance DC resistors, composite insulation structure design, energy distribution technology, testing technology, etc., and prototype production is in progress.
High voltage arrester
