变电站电容器组不平衡电压值的探讨

针对一次电容器组差压保护带负荷试验的异常情况，从电容器不平衡电压保护的基本原理人手，通过对比分析整定计算工程应用公式和一次系统设备参数的对应关系，对可能造成电容器差压保护误动、误整定的异常情况进行了详细分析，结合工作实际提出了加强电容器组不平衡电压保护运维管理工作的建议。

Discussion on Magnitude of Unbalanced Voltage of Capacitor Bank in Substations

Aiming at the abnormal circumstance of load test on differential protection of capacitor bank, the paper starts from the basic principle of unbalance voltage protection and conducts a detailed analysis on ab- normalities that potentially cause maloperation and missetting of differential pressure protection of the capaci- tor by comparing and analyzing the coincidence relation between setting and calculation of technical applica- tion formula and parameters of primary system equipment. The paper finally suggests strengthening the opera- tion and maintenance of unbalanced voltage protection of capacitor bank combining the work practice.