After continuous power grid construction, China has basically formed an ultra-high voltage power transmission network that transmits power from the west to the east and from the north to the south. The safe and stable transmission of electric energy is the key to China's energy strategy. The switchgear with high voltage level and high reliability in the transmission line is an important equipment to ensure the safe operation of the power grid. The stability, selectivity, absorptive capacity and precise protection capacity of such equipment are important contents of power grid construction.
In order to reduce unplanned power outage accidents, ensure power supply continuity and build a strong power grid, State Grid Corporation of China and China Southern Power Grid Corporation have put forward clear technical requirements for the core components of high-voltage switches. According to the requirements of Eighteen Major Anti accident Measures of State Grid Corporation of China, the starting power of the relay at the tripping outlet circuit of high-voltage circuit breaker should maintain a fixed threshold, and electrical equipment should not add oscillation elements, The working characteristics shall meet the electromagnetic operation indexes, which are mutually constrained. The design and manufacturing swing space is small, and the manufacturing is very difficult. Faced with these difficulties, Tianshui 213 Electric Appliance Group took advantage of its deep industrial chain, adopted continuous adjustment and combined manufacturing technology, and formed a special class using resources with strong spare parts production capacity and excellent technical team. Through a period of research and development and continuous testing, it finally developed products that meet the requirements, sent them to Xi'an XD Switch Electric Co., Ltd. for testing, and won in the same competition of multiple suppliers, It reflects the achievements of enterprise transformation and upgrading, and demonstrates the strength of Made in China.
At present, the product has been successfully deployed in dozens of domestic and foreign power stations for stable operation, and is also being recommended for use by other high-voltage switch manufacturers. It is hoped that through continuous cooperation and efforts, it can contribute to the stable operation of China's power grid and help China's equipment manufacturing industry achieve high-quality development.