可控高压电抗器应用于西北750kV电网的仿真分析

Simulation Analysis on Application of Controllable Reactors in 750 kV Northwest China Power Grid

提出在连接西北主网与新疆电网的哈密—永登750kV输电通道上配置可控高压电抗器,提高潮流调控能力,更好地限制工频过电压和潜供电流。基于2010年和2020年的西北电网750kV输电系统运行方式,分析了可控高压电抗器对系统长期运行经济性和动态品质的影响,评估了可控高压电抗器所能带来的经济效益。结果表明,可控高压电抗器能改善系统的稳态、机电和电磁暂态特性。指出:综合系统运行经济性、安全性和控制灵活性等方面因素,可以将可控高压电抗器配置在750kV张掖站。

Hami-Yongdeng transmission corridor connects the Northwest China power gird and Xinjiang power grid. It is proposed to allocate 750 kV controllable reactor on that line to improve the regulating and controlling capability to power flow and restrain the power-frequency overvoltage and secondary arc current. Base on the 750 kV transmission systems operating modes of Northwest China power gird in 2010 and 2020, the influences Of high voltage controllable reactor on long term economic operation and dynamic performance of power system are analyzed. The economic benefit from the application of high voltage controllable reactor is also evaluated. Results show that its application helps to optimize power system steady state operation and improve its electro-mechanical and electro-magnetic performance. It is concluded that considering the economy, security and flexibility of power dispatch, it is preferable to allocate high voltage controllable reactor at Zhangye substation.