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In order to study the measurement performance of ECT,taking the ECT of Roche coil as object,the influence of ambient temperature,adjacent phase current and harmonic factors on measurement accuracy was analyzed.The results show that the change of temperature can cause the ECT's fluctuating error to reach the half and above of 0.2Sbasic error's;the adjacent phase current affects the 0.2SECT's error but it has not over-error;Rogowski coil ECT can accurately measure the harmonic current,and has no influence on the measurement of fundamental wave current.The results provide theoretical basis for rational design of low-variable-ratio structure of ECT of Roche coil.
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Basic Information:
DOI：10.20040/j.cnki.1000-7709.2017.03.047
China Classification Code:TM452
Citation Information:
[1]HU Hao-liang,PU Yan,XIONG Qian-zhu ,et al.Test and Analysis of Low Ratio ECT Performance Measurement[J].Water Resources and Power,2017,35(03):186-189.DOI:10.20040/j.cnki.1000-7709.2017.03.047.
Fund Information:
国家电网公司科技项目(JL71-15-040)
2017-03-25
2017-03-25