补偿电网阻尼率及脱谐度问题研究

Study on damping rate and out-of-resonance degree of power compensation network

阻尼率和脱谐度是补偿电网的两个重要参数。针对补偿电网运行中出现的虚幻接地、三相电压不平衡等问题,分别从中性点位移电压、三相电压不平衡度以及残流的有功分量、无功分量等方面,分析了阻尼率和脱谐度对补偿电网运行特性的影响,推导出了阻尼电阻和脱谐度的配置公式,也解决了运行中出现的此类问题。

Damping rate and out-of-resonance degree are two important parameters of power compensation network. To resolve the existing problems on these two parameters, such as virtual earth and three-phase unbalanced voltages, this paper analyses some influence on power compensation network operation characteristics due to the changes of damping rate and out-of-resonance degree in some aspects, like neutral-to-ground voltage, unbalanced degree on the three-phase voltages, and component of residual current. It also gives reasonable formulae for setting damping rate and out-of-resonance degree. The adoption of these research methods also solves actual operation of arc-suppression coils concerned.