低压配电设计中电容补偿容量计算分析

低压配电系统电容补偿设计中,为了抑制电容器回路合闸涌流和谐波电流,通常在电容器回路中串接电抗器;串入的电抗器自身的感抗会抵消电容器的部分容抗,对电容器的有效补偿量产生影响。因而,在进行无功补偿容量的计算时,要根据系统运行电压、电抗率的选择,以及电容器额定电压进行修正计算。

Calculation Analysis on Capacitance Compensation in Low-voltage Distribution Design

In capacitance compensation design for low-voltage distribution system, to suppress the switching inrush current and harmonic current in capacitor circuit, a reactor is usually connected in series in capacitor circuit; the inductive reactance of the reactor will partially offset the capacitive reactance of capacitor, which will affect the effective compensation of capacitor. Therefore, in calculation of reactive compensation capacity, correction shall be done according to operating voltage of system, reactance rate and rated voltage of capacitor.