500 kV线路限流电抗器保护用电容器装置的研制

Development of Capacitor for 500 kV Line Currentlimiting Reactor Protection

针对变电站出现系统故障时,与之相连的线路断路器的瞬态恢复电压(TRV)陡度会瞬间提高,影响断路器的正常开断。为了解决这一问题,本文设计了一种在500 kV线路上对限流电抗器起抑制谐波、限制合闸涌流等作用的保护电容器装置(简称“电容器装置”)。首先,对电容器装置的工作原理及设计方案进行说明;其次,开展了静力强度、抗震性能和电场仿真计算,仿真结果表明均满足设计要求;最后,该装置一次性成功通过全套型式试验项目,满足相关标准及技术条件要求。

In case of system fault in substation,the transient recovery voltage steepness of circuit breaker connected to the system increases instantly and affects normal interruption operation of the circuit breaker.For solving this problem,a kind of protection capacitor device(“capacitor device”in short)with such functions as harmonic suppression and limit of closing inrush current of current limiting reactor on the 500 kV transmission line is designed in this paper.First of all,both operating principle and design scheme of the capacitor device are described;Then,the static strength,seismic performance and electric field simulation calculations are performed and the simulation shows that they meet the design requirement;Finally,the device passes the complete set of type test items one time and meets the requirements of related standards and technical specification.