750kV分级投切式可控高压并联电抗器研究

Research of 750kV Switching-type Classification Controllable High-voltage Shunt Reactor

阐述了分级投切式可控高压并联电抗器的基本工作原理,装置能够调节系统无功功率、抑制工频过电压和潜供电流,具有功率连续平滑可调、谐波电流小和响应速度快的优点。应用傅立叶级数分解方法对即将在河西750 kV输电工程中的敦煌变电站投运的300 Mvar750 kV可控高压并联电抗器的工作绕组电流的谐波含量进行了分析。然后,根据河西750 kV输电工程的规划,分析了装设在敦煌母线侧分级投切式可控高抗对系统工频过电压造成的影响。

This paper describes the classification of high-voltage switching controllable shunt reactor of the basic working principle . The device can adjust the system reactive power, suppress over-voltage and frequency arc current, with a continuous smooth power adjustable harmonic current small and the advantages of fast response. Article uses Fourier series decomposition method. This method analyzed about current harmonic content of 300Mvar750 kV controllable high voltage shunt reactor work winding which will put into operation in Hexi 750 kV transmission project Dunhuang substation. Then, according to Hexi 750 kV transmission project planning, analysis of the installation of grading in Dunhuang bus side controllable switching frequency of the system highly resistant to the impact of overvoltage.