电力行业标准异频法公式勘误与电容电流测试新方法

发布时间：2018-03-30 23:13

本文选题：电力行业标准　切入点：电容电流测量　出处：《电力系统自动化》2017年01期

【摘要】：指出并验证了电力行业标准中"三异频等幅电流阻抗法"计算电容和电容电流公式的错误,推导得出了正确的计算公式。此外,针对从电压互感器开口三角注入异频电流测量电容电流方法存在效率低、安全性及准确性不高等缺点,提出了一种从电容器组中性点注入异频电流测量电容电流的方法,通过数学理论推导、模拟试验和现场测试对该方法的准确性进行验证,同时由模拟试验结果分析了各种因素对新方法测试误差的影响。
[Abstract]:This paper points out and verifies the error of "three different frequencies equal amplitude current impedance method" in the standard of electric power industry, and deduces the correct formula for calculating capacitance and capacitive current. In view of the disadvantages of low efficiency, low safety and low accuracy, a method of measuring capacitance current by injecting different frequency current from the neutral point of capacitor bank is proposed, aiming at the shortcomings of measuring capacitance current by injecting different frequency current into the opening triangle of voltage transformer, and the method of measuring capacitance current by injecting different frequency current from neutral point of capacitor bank is presented. The accuracy of the method is verified by mathematical theory derivation, simulation test and field test. At the same time, the influence of various factors on the test error of the new method is analyzed by the result of simulation test.
【作者单位】：国网江西省电力科学研究院;武汉理工大学自动化学院;
【分类号】：TM930

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