并联电容器、串联电抗器额定电压的选择

The Selection of the Rated Voltage of Shunt Capacitor and Series Reactor

一些单位为了提高并联电容器装置的运行安全可靠性,选择设备时预留一定的裕度,如提高所选择电容器的额定电压。这种预留一定裕度的做法不仅会出现无功容量亏损,造成无功补偿的不足,还可能导致某次谐波放大,甚至造成谐波谐振,危及电网的安全、经济、优质运行。文章着重分析并联电容器及串联电抗器额定电压选择不当可能产生的后果,就如何避免提出建议及对策,并总结了并联电容器及串联电抗器额定电压的选择原则。

In order to improve the safe reliability of shunt capacitor devices, some units like to enlarge the reserved capacity, such as increasing the rated voltage of capacitor, when they choose equipment. These actions will not only lead to the loss of reactive compensation, but also magnify some harmonic possibly, even cause harmonic resonance which endangers the normal operation of network. This paper introduces the possible consequences if the shunt capacitor and series reactor didn't be selected properly and concludes the choice principle of the shunt capacitor and series reactor. The points for attention are also given.