电容器组的容差分析与保护设计

Capacitance Error Analysis of Power Capacitor Group and Protection Design

用随机误差理论对电容器组的电容误差值 (简称容差 )进行了分析研究与计算。并对电容器组中多台电容器故障时 ,不同保护方案的动作整定值及可靠性与灵敏度等问题进行了较为深入地研究与比较 ,提出了可行指数的概念 ,确定出不同保护方案的适用范围 ,为实际工程中合理选择最佳保护方案提供了理论依据。

With random error theory the capacitance error of power capacitor group is analyzed and calculated. By studying and comparing various protection schemes and their reliability and sensitivity when more than one capacitor are in fault, a new concept, namely feasibility index, is put forward to fix on the applicable range for different protection schemes. This provides the theoretic foundation for selecting the optimal protection scheme in projects.