特高压电容式电压互感器误差在线同级比对技术研究
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摘要
作为特高压计能装置的重要组成部分,电容式电压互感器(Capacitor Voltage Transformer,CVT)需要定期进行误差校验,以判断其是否符合准确度等级要求。当前CVT误差校验存在着几个问题急需解决:(1)高抗出线侧CVT交接试验无法在全电压下进行;(2)停电校验困难;(3)校验结果偏离CVT在线状态下的实际值。为此迫切需要开展在线同级比对研究。在此背景下,以特高压CVT的误差特性为研究对象,进行了在线误差校验研究装置和试验方法研究,并将研制的在线校验系统,用于特高压浙福工程中的特高压电容式电压互感器的误差现场试验,获得了CVT在运行过程中的误差特性数据,验证了该方法可以实现对CVT的在线同级比对。
As an important part of the UHV energy metering device, Capacitor Voltage Transformer(CVT) needs periodic error checking to determine whether it meets the accuracy level requirement. At present, there are several problems needed to be solved in CVT error checking:(1) It can not carry out the full voltage acceptance test on the CVT beside the high resistance;(2) Off-line calibration is hard to implement;(3) The verification result deviates from the actual value of CVT online state, so it is urgent to carry out on-line peer comparison research. Under this background, this paper takes the error characteristics of UHV CVT as the research object and studies the research device and test method of on-line error checking.The developed online checking system is used in error field test of UHV capacitor voltage transformer of Zhejiang-Fuzhou UHV project and the on-line error characteristics data during CVT operation is obtained, verifying that using the method can achieve CVT on-line peer comparison.
As an important part of the UHV energy metering device, Capacitor Voltage Transformer(CVT) needs periodic error checking to determine whether it meets the accuracy level requirement. At present, there are several problems needed to be solved in CVT error checking:(1) It can not carry out the full voltage acceptance test on the CVT beside the high resistance;(2) Off-line calibration is hard to implement;(3) The verification result deviates from the actual value of CVT online state, so it is urgent to carry out on-line peer comparison research. Under this background, this paper takes the error characteristics of UHV CVT as the research object and studies the research device and test method of on-line error checking.The developed online checking system is used in error field test of UHV capacitor voltage transformer of Zhejiang-Fuzhou UHV project and the on-line error characteristics data during CVT operation is obtained, verifying that using the method can achieve CVT on-line peer comparison.
引文
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[12]余春雨,王晓琪,盛国钊.CVT现场校验的误差来源与分析[J].电力电容器,2000(3):27-31.YUChunyu,WANG Xiaoqi,SHENG Guozhao.Error source and analysis on CVT worksite calibration[J].Power Capacitors,2000(3):27-31.
[13]王珏昕,曹凤田,王乐仁,等.非传统互感器的原理与性能分析[J].吉林电力,2010,38(5):8-12.WANG Juexin,CAO Fengtian,WANG Leren,et al.Theory and performance analysis of un-traditional transformer[J].Jilin Electric Power,2010,38(5):8-12.
[14]李璿,余春雨,王晓琪,等.CVT附加相差对容性设备介损在线监测的影响[J].电测与仪表,2013,50(11):10-13.LI Xuan,YU Chunyu,WANG Xiaoqi,et al.Effect of CVT additional phase error on on-line monitoring of dielectric loss factor for capacitive equipment[J].Electrical Measurement&Instrumentation,2013,50(11):10-13.
[15]孙建涛,文习山,王晓琪,等.绝缘在线监测中电容式电压互感器的误差校正[J].电力系统自动化,2008,32(16):61-66.SUN Jiantao,WEN Xishan,WANG Xiaoqi,et al.Error correction of capacitor voltage transformers for insulation on-line monitoring[J].Automation of Electric Power Systems,2008,32(16):61-66.
[2]周雪青,郝晓光,张岩坡,等.基于分段拟合算法的电流互感器误差研究[J].电力系统保护与控制,2017,45(3):139-143.ZHOU Xueqing,HAO Xiaoguang,ZHANG Yanpo,et al.Research on the error of current transformer based on subsection fitting algorithm[J].Power System Protection and Control,2017,45(3):139-143.
[3]宋璇坤,闫培丽,肖智宏,等.全光纤电流互感器技术应用评述[J].电力系统保护与控制,2016,44(8):149-154.SONG Xuankun,YAN Peili,XIAO Zhihong,et al.Comment on the technology and application of fiber optic current transformer(FOCT)[J].Power System Protection and Control,2016,44(8):149-154.
[4]张侃君,戚宣威,胡伟,等.YD型换流变三角形绕组CT饱和对直流保护的影响及对策[J].电力系统保护与控制,2016,44(20):99-105.ZHANG Kanjun,QI Xuanwei,HU Wei,et al.Impact of the CT saturation of the delta winding on the HVDC protection and its countermeasure[J].Power System Protection and Control,2016,44(20):99-105.
[5]王玲,冯宇,邱进,等.电压互感器谐波特性测量用可控谐波电压源的构建[J].电力系统保护与控制,2015,43(16):106-111.WANG Ling,FENG Yu,QIU Jin,et al.Construction of controllable harmonic voltage source for harmonic characteristic measurement[J].Power System Protection and Control,2015,43(16):106-111.
[6]冯宇,王晓琪,陈晓明,等.电容式电压互感器电路参数对电网谐波电压测量的影响[J].中国电机工程学报,2014,34(28):4968-4975.FENG Yu,WANG Xiaoqi,CHEN Xiaoming,et al.Influences of circuit parameters of capacitor voltage transformer on grid harmonic voltage measurements[J].Proceedings of the CSEE,2014,34(28):4968-4975.
[7]彭卉,邹舒,付永生,等.冲击负荷接入电网的电能质量分析与治理方案研究[J].电力系统保护与控制,2014,42(1):54-61.PENG Hui,ZOU Shu,FU Yongsheng,et al.Research ofthe power quality problem and treatment scheme forimpact loads connected into power system[J].Power System Protection and Control,2014,42(1):54-61.
[8]梁志瑞,叶慧强,赵飞.电力系统谐波状态估计研究综述[J].电力系统保护与控制,2010,38(15):157-159.LIANG Zhirui,YE Huiqiang,ZHAO Fei.Overview onpower system harmonic state estimation[J].Power System Protection and Control,2010,38(15):157-159.
[9]李昊翔.基于电容分压的电子式电压互感器的研究[D].武汉:华中科技大学,2011.LI Haoxiang.Research on electronic voltage transformerbasedon capacitive voltage divider[D].Wuhan:Huazhong University of Science and Technology,2011.
[10]冯宇,谢超,王玲,等.电子式电压互感器谐波传变特性分析[J].高压电器,2014,50(11):97-102.FENG Yu,XIE Chao,WANG Ling,et al.Analysis onharmonic transfer characteristics of electronic voltagetransformers[J].High Voltage Apparatus,2014,50(11):97-102.
[11]孟祥甫,刘于超,李振东.电容式电压互感器现场校验方法改进探讨[J].电测与仪表,2010,47(7):16-19.MENG Xiangfu,LIU Yuchao,LI Zhendong.Discussion the improvement of field calibration of capacitor voltage transformer[J].Electrical Easurement&Instrumentation,2010,47(7):16-19.
[12]余春雨,王晓琪,盛国钊.CVT现场校验的误差来源与分析[J].电力电容器,2000(3):27-31.YUChunyu,WANG Xiaoqi,SHENG Guozhao.Error source and analysis on CVT worksite calibration[J].Power Capacitors,2000(3):27-31.
[13]王珏昕,曹凤田,王乐仁,等.非传统互感器的原理与性能分析[J].吉林电力,2010,38(5):8-12.WANG Juexin,CAO Fengtian,WANG Leren,et al.Theory and performance analysis of un-traditional transformer[J].Jilin Electric Power,2010,38(5):8-12.
[14]李璿,余春雨,王晓琪,等.CVT附加相差对容性设备介损在线监测的影响[J].电测与仪表,2013,50(11):10-13.LI Xuan,YU Chunyu,WANG Xiaoqi,et al.Effect of CVT additional phase error on on-line monitoring of dielectric loss factor for capacitive equipment[J].Electrical Measurement&Instrumentation,2013,50(11):10-13.
[15]孙建涛,文习山,王晓琪,等.绝缘在线监测中电容式电压互感器的误差校正[J].电力系统自动化,2008,32(16):61-66.SUN Jiantao,WEN Xishan,WANG Xiaoqi,et al.Error correction of capacitor voltage transformers for insulation on-line monitoring[J].Automation of Electric Power Systems,2008,32(16):61-66.