As of December 7, the three ±800 kV UHV DC lines, Baihetan-Zhejiang, Xiluodu Left Bank-Jinhua, and Lingzhou-Shaoxing, have delivered a total of more than 600 billion kilowatt-hours of electricity to Zhejiang. This major achievement is inseparable from the support and guarantee of a series of power equipment, such as isolating switches, vacuum circuit breakers, transformers, switch cabinets, drop-out fuses and lightning arresters. These devices play a vital role in the power transmission process, ensuring safe, stable and efficient power transmission.
Isolating switches and vacuum circuit breakers play an important role in the power system. They can ensure the reliable cutting off and switching on of the current, thereby ensuring the safe operation of the power system. Transformers are key equipment for voltage conversion. Through the regulation of transformers, stable transmission of power can be achieved. Switchgear and drop-out fuses are protective devices in the power system. They can effectively prevent faults such as current overload and short circuit. Lightning arresters can effectively prevent lightning and other natural disasters from damaging power facilities.
In addition, in order to ensure the safe operation of the energy artery, State Grid Zhejiang Electric Power Co., Ltd. has reserved support materials in advance and carried out oil level prediction work for oil-filled equipment such as transformers. At the same time, the number of inspections has been increased based on actual conditions to ensure that the UHV converter station is always operating in good condition during the peak winter period.
In short, equipment such as isolation switches, vacuum circuit breakers, transformers, switch cabinets, drop-out fuses and arresters play an irreplaceable role in the power system, providing a strong guarantee for the safety, stability and efficient transmission of power. At the same time, State Grid Zhejiang Electric Power Co., Ltd.'s meticulous maintenance and inspection work also ensured the safe operation of UHV DC lines, providing solid support for Zhejiang's economic and social development and energy security.