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发明公开
CN107884645A 基于电压比较的电力电容器运行状态监测方法 无效 - 驳回

基于电压比较的电力电容器运行状态监测方法
摘要：
本发明涉及电力系统故障检测技术领域，具体涉及一种基于电压比较的电力电容器运行状态监测方法，包括以下步骤：1)、测量装置首先从电力电容器C成套装置所在变电站母线的电压互感器TV的二次回路上获取母线电压值U；2)、计算得到电力电容器C运行电压的理论值U'c，U'c＝U/(1-β)；3)、从并联至电力电容器C两端的电压互感器TV的二次侧获取电力电容器C实际运行电压值Uc；4)、分析比较电力电容器C运行电压理论值U'c和测得的电力电容器C实际运行电压Uc；本发明是对实际运行工况下的电压参数测量和分析计算，能够真实反映其运行状态，三相同时在线检测，测量结果可信度更高，而且能发现停电试验在低电压、小电流下测量不能发现的缺陷。
摘要（英）：

The present invention relates to the field of power system fault detection technology, especially to a power capacitor operation state monitoring method based on voltage comparison. The method comprises the following steps that: 1) a measurement device obtains a bus voltage value U from a secondary circuit of a voltage transformer TV of a transformer substation bus where a power capacitor C complete device is located; 2) a theoretical value U'c of a running voltage of the power capacitor C is obtained through calculation, wherein U'c=U/(1-[Beta]; 3) an actual running voltage value Uc of the power capacitor C is obtained from a secondary side of the voltage transformer TV being connected in parallel with two ends of the power capacitor C; and 4) the theoretical value U'c of the running voltage of the power capacitor C and the measured actual running voltage value Uc of the power capacitor C are analyzed and compared. The method provided by the invention can perform voltage parameter measurement and analysis calculation in the actual running condition to really reflect the running state of the power capacitor, performs three-phase simultaneous online detection to allow the measurement result credibility to be higher, and can discover defects which cannot be discovered in a low voltage and a small current, of a black-out test.

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