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作 者:李振华[1] 沈聚慧 李振兴[1] 童悦 吴琳 LI Zhenhua;SHEN Juhui;LI Zhenxing;TONG Yue;WU Lin(Electrical Engineering&New Energy,China Three Gorges University,Yichang 443000,China;Liuzhou Power Supply Bureau,Guangxi Power Grid Co.,Ltd.,Liuzhou 545005,China;China Electric Power Research Institute Co.,Wuhan 430074,China;State Grid Hubei Electric Power Company Technology and Training Center,Wuhan 430014,China)
机构地区:[1]三峡大学电气与新能源学院,湖北宜昌443000 [2]广西电网有限责任公司柳州供电局,广西柳州545005 [3]中国电力科学研究院有限公司,湖北武汉430074 [4]国网湖北省电力有限公司技术培训中心,湖北武汉430014
出 处:《电力系统保护与控制》2020年第16期131-139,共9页Power System Protection and Control
基 金:国家自然科学基金项目资助(51507091);三峡大学学位论文培优基金项目资助(2019SSPY068)。
摘 要:为了准确分析隔离开关开合容性小电流过程中电弧放电对110 kV罗氏(Rowgowski)线圈电流互感器的干扰情况,采用ATP-EMTP中的TACS元件建立了动态电弧模型。参考标准GB/T 1985—2014,建立隔离开关开合容性小电流试验电路,结合所建立的动态电弧模型,仿真得到隔离开关开合过程中,所产生电磁干扰的电流最大幅值为576 A。电压最大幅值标幺值为1.8 p.u.,暂态电流频率高达210 kHz。同时分析了电源侧对地杂散电容、接地电阻等因素对隔离开关电弧模型参数的影响。并建立了相应的实验线路,实测了隔离开关开合容性小电流过程中的暂态波形。通过对比实测与仿真产生的电弧放电电压、电流波形,发现两者暂态电流、电压变化过程相符,验证了所建电弧模型的正确性。In order to accurately analyze the interference of arc discharge on a 110 kV Rogowski coil electronic transformer in the process of switching on and off capacitive small current of disconnector,a dynamic arc model is established using a TACS module of ATP-EMTP.Referring to the standard GB 1985—2014,a small current test circuit of disconnector opening and closing capacitance is established.Combining with the dynamic arc model,the maximum current amplitude of electromagnetic interference is 576 A,the maximum voltage amplitude is 1.8 p.u,and the transient current frequency is up to 210 kHz.At the same time,the ground capacitance and grounding resistance of the transformer are analyzed.The influence of factors on the parameters of the arc model of the disconnector is studied.The corresponding experimental circuit is set up.The small open-close capacitive current of the disconnector is measured.By comparing the voltage and current waveforms of arc discharge produced by actual measurement and simulation,the correctness of the established arc model is verified.
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