电力系统并联补偿装置中的LC串联电路

LC Series Circuit in the Power System Parallel Compensation Device

在电力系统中,并联补偿装置可以补偿系统中的无功功率、降低网络损耗、提高功率因数和电压质量。并联电容器装置是电力系统中最常用的并联补偿装置,电容器和电抗器串联连接就构成了LC串联电路。电容器主要用于补偿系统中的感性无功,通常与系统负荷端并联连接;而为了降低电容器合闸投运过程中的涌流倍数,以及抑制电网电压波形畸变和控制流过电容器的谐波分量,还需给电容器配套选用串联电抗器。本文在讨论了LC串联电路之后,提出了与电容器配套使用的电抗器电抗率的选取方法。

In the power system, parallel compensation device can compensate the reactive power in the system, reduce network losses and improve power factor and voltage quality. The parallel capacitor device is the most common parallel compensation devices in power system. The series connection of capacitors and reactors is LC series circuit. Capacitors are used to inductive reactive in the compensation system, usually connected with load side of the system in parallel form, and in order to reduce the inrush current multiples of capacitor in the process of closing the brake and powerstation, restrain the waveform distortion of the network voltage and control the harmonic components that flowing through the capacitor, still need to use the reactor to support the capacitor series. This paper discussed the LC series circuit, then proposed method to select the reactor reactance rate to support the use of the capacitor.