作者：刘俭, 姜春阳, 殷小东, 冯宇, 熊博, 刘浩
作者单位：中国电力科学研究院有限公司，湖北 武汉 430074
关键词：谐波电压互感器;宽频特性测量;低介质损耗;量值溯源
摘要：
为实现谐波电压互感器的宽频特性测量，该文设计低介质损耗的110 kV宽频电容分压器。分别采用气体介质的同轴和叠片电容器作为高低压臂电容，并设计可调电容实现变比平滑可调。对与低压电容并联RC网络的等效阻抗和其对低频响应造成的影响进行分析，并合理选取元件参数。在通过电磁式宽频比例标准完成单一频率下量值溯源的基础上，实现谐波电压互感器在波形叠加和单一频率下的宽频误差测量。试验结果表明，所测谐波电压互感器在50~
Study on frequency characteristics of harmonic voltage transformer
LIU Jian, JIANG Chunyang, YIN Xiaodong, FENG Yu, XIONG Bo, LIU Hao
China Electric Power Research Institute Co., Ltd., Wuhan 430074, China
Abstract: A 110 kV wide-band capacitor divider with low dielectric loss is designed to measure the frequency characteristics of harmonic voltage transformer. The coaxial and laminated capacitors of gas medium are used as high and low voltage arm capacitors, and adjustable capacitors are designed to achieve smooth and adjustable ratio. Equivalent impedance and the influence on low frequency response are analyzed about the RC network parallel with low voltage capacitance, and the element parameters are reasonably selected. On the basis of completing the traceability of the value under the single frequency through the electromagnetic wide band standard. Error measurement at different frequencies of harmonic voltage transformer is realized under aliasing waveform and single frequency waveform. Experimental results indicate that the error limit of the measured harmonic voltage transformer meets the requirements at 50-
Hz frequency. The variation of the harmonic measurement ratio is less than 0.4% and the phase difference is less than 14' under the condition of single frequency harmonic and aliasing waveform.
Keywords: harmonic voltage transformer;broadband characteristic measurement;low dielectric loss;quantity traceability
2021, 47(8):130-136 收稿日期: 2020-10-30;收到修改稿日期: 2020-12-04
基金项目: 中国电科院项目（JL83-19-015）
作者简介: 刘俭(1994-),男,山西临汾市人,工程师,硕士,主要从事互感器与精密测量技术研究
参考文献
[1] 刘春雨, 罗群, 顾强, 等. 智能配电网电能计量设备的运行状态监测终端研究[J]. 中国测试, 2020, 46(7): 68-74
[2] 王昕, 曹文彬, 曹敏, 等. 基于PCA-KELM和AT的互感器故障诊断[J]. 中国测试, 2019, 45(11): 72-78
[3] 方文田. 电容式电压互感器谐波测量校正装置的设计[J]. 黑龙江电力, 2020, 42(3): 208-214
[4] 谢伟伦, 黄志威, 刘小沛. 杂散电容对CVT谐波测量影响的处理方法研究[J]. 电力电容器与无功补偿, 2020, 41(2): 59-63
[5] 薛峰, 谢伟伦, 谢培成, 等. CVT分压电容对谐波传变特性影响修正方法研究[J]. 电力电容器与无功补偿, 2020, 41(1): 129-134
[6] 李玉超, 刘开培, 乐健, 等. 电磁式电压互感器频域测量误差分析[J]. 电测与仪表, 2016, 53(8): 50-56
[7] 徐熙彤, 贾正森, 王磊, 等. 基于约瑟夫森量子电压的谐波电压测量方法研究[J]. 计量学报, 2020, 41(3): 311-316
[8] 张国灿, 杨文陵, 连和, 等. 基于电场耦合法的高压输电线路谐波检测方法的研究与设计[J]. 电测与仪表, 2020, 6(1): 1-8
[9] BLAJSZCZAK G, Resistive voltage divider for higher harmonics measurement in 400 kV network[C]//Electrical Power Quality and Utilisation (EPQU), 2011 11th International Conference on, 2011.
[10] KYRIAZIS G A, RIBEIRO FRANCO A M, DEBATIN R M, et al. Precise resistive voltage divider for harmonic measurements[C]//Precision Electromagnetic Measurements (CPEM), 2012.
[11] GABRIELLA C, DANIELE G, DOMENICO G, et al. Frequency response of MV voltage transformer under actual waveforms[J]. IEEE Transactions On Instrumentation And Measurement, 2017, 66(6): 1146-1154
[12] CROTTI G, GALLO D, GIORDANO D, et al. Frequency calibration of MV voltage transformer under actual waveforms[C]//Proc. Conf. Precis. Electromagn. Meas. (CPEM), 2016.
[13] 姜春阳, 刘浩, 周峰, 等. 有源电容式分压器的研制[J]. 电测与仪表, 2019, 56(6): 148-152
[14] 王勤, 周峰, 姜春阳, 等. 正立式压缩气体标准电容器的研制[J]. 高电压技术, 2013, 39(6): 1509-1514
[15] 姜春阳, 周峰, 袁建平, 等. 谐波电压比例标准装置及溯源方法研究[J]. 电测与仪表, 2016, 53(23): 6-10+22
