电压互感器一次消谐电阻对有源电压消弧的影响与解决方法  

Influence of Primary Suppression Resistance of Voltage Transformer on Active Voltage Arc Suppression and Its Solution

作　　者：郭润生 牛维 李梁 王焕明 李银平 GUO Runsheng;NIU Wei;LI Liang;WANG Huanming;LI Yinping(Shuozhou Power Supply Company,State Grid Shanxi Electric Power Corporation,Shanxi Shuozhou 036000,China;Taiyuan Power Supply Company,State Grid Shanxi Electric Power Corporation,Taiyuan 030000,China)

机构地区：[1]国网山西省电力公司朔州供电公司,山西朔州036000 [2]国网山西省电力公司太原供电公司,太原030000

出　　处：《电力电容器与无功补偿》2024年第5期61-68,共8页Power Capacitor & Reactive Power Compensation

基　　金：国网山西省电力公司朔州供电公司科技项目(5205F0220003)。

摘　　要：10 kV配电网中,母线电压互感器大多采用一次侧串联消谐电阻的方式抑制谐振,其测量的母线相电压与实际电压存在误差。而现有的有源电压消弧方法需要测量三相电压与系统中性点电压,通过控制中性点电压来抑制故障相电压达到消弧目的,而故障相电压的测量受到一次消谐电阻的影响。因此一次消谐电阻不仅会影响母线三相电压的测量数据,还会影响有源电压消弧装置的消弧效果。文章通过分析一次消谐电阻与有源电压消弧的原理,研究了一次消谐电阻影响有源电压消弧的机理,提出了一种线电压测量的有源电压消弧计算方法。在Matlab/Simulink中建立仿真模型,对该方法进行仿真分析,同时在实际变电站进行真型故障模拟,仿真和实际模拟结果表明消弧效果良好,从而验证了该方法的有效性。In 10 kV distribution network,most of the busbar voltage transformers adopt the series of suppression resistance of the primary side to suppress resonance,and there is an error between the measured busbar phase voltage and the actual voltage.However,the existing active voltage suppression method needs measuring the threephase voltage and the neutral point voltage of the system,and the fault phase voltage is suppressed by controlling the neutral point voltage to reach the purpose of arc suppression.However,the measurement of fault phase voltage is affected by the primary harmonic resistance.Therefore,the primary harmonic suppression resistance can not only affect the measured data of the threephase voltage of the bus,but also the arc suppression effect of the active voltage arc suppression device.Based on the analysis of the principle of primary harmonic suppression resistance and active voltage arc suppression,the mechanism of the influence of primary harmonic suppression resistance on the active voltage arc suppression is studied in this paper,and a kind of calculation method of active voltage arc suppression for line voltage measurement is proposed.The simulation model is set up in Matlab/Simulink to simulate and analyze the method.At the same time,the real fault simulation is performed in actual substation is performed.The simulation and actual results shows perfect arc suppression effect,thus the effectiveness of the method is verified.

关 键 词：配电网 电压互感器 一次消谐电阻 有源电压消弧 

分 类 号：TM451[电气工程—电器]