基于相位比较的1000kV特高压串补电容器组不平衡度分析及调整

Analysis and Adjustment of 1 000 kV UHV Series Compensation Capacitor Bank Unbalance Factor Based on Phase Comparison

电容器组不平衡电流可以有效监测电容器组运行状况,及时发现电容器单元内部故障。通过对1 000 kV特高压串补电容器组不平衡度的计算分析,结合特高压串补控保的录波波形,提出了一种基于相位比较的特高压串补电容器组不平衡度分析方法,该方法通过分析电容器组不平衡电流和电容器组电流的相位关系,从而得出电容器组不平衡调整的方法,通过现场的实际案例验证了方法的有效性和快速性,为现场的故障处理节省宝贵的时间。

The operating conditions of capacitor bank can be effectively monitored by unbalanced current so that the internal failure of the capacitor bank can be detected timely. In this paper, based on phase comparison, a new method to analyze the unbalance factor of SC capacitor bank is proposed by calculating and analyzing the unbalance factor of 1 000 kV UHV SC capacitor bank the wave record of control and protection equipments. The method to adjust the unbalance is concluded through analyzing the phase relation between capacitor bank unbalance current and capacitor bank current. The effectiveness of the method is verified through case study and it is time-saving for fault treatment of SC capacitor bank.