箱式高压并联电容器电压差动继电保护的探讨

Research on the Differential Voltage Protection for High Voltage Shunt Tank Capacitor

根据由大元件构成的箱式并联电容器的基本参数和结构特点,推导了电压差动保护和故障后完好元件上过电压倍数的计算式,并举例作了计算和说明,讨论了初始不平衡电压的影响因素。

In terms of the basic parameters and configuration characteristics of tank type shunt capacitors which are composed of a number of larger elements, this paper educes the calculating formulas for their differential voltage protection and over-voltage times on intact elements after any element is in failure, as well as gives an example for protection calculating and explaining, then discusses some factors that affect initial imbalance voltage.