Hn-ave Frequency Response Estimation of Current Transformer with Synchronized Multi-Frequency Signal
Zhu Liang1, Wen He2, Ma Jian1, Zhang Chunqiang1, Jin Ran2
1.Electric Power Research Institute of State Grid Jiangxi Electrical Power Company Nanchang 330096 China 2.College of Electrical and Information Engineering Hunan University Changsha 410082 China
Abstract：In the estimation of frequency response characteristic of current transformer,the traditional methods require either heavy workload or a long test time.This paper proposed a Hn-ave frequency response estimation of current transformer with synchronized multi-frequency signal.The proposed method used a multi-frequency synchronized signal as the input.And it applied the shift correlation method to reduce the attenuation of the correlation function waveform.An average of cross-correlation power spectrum was adopted to suppress the influence of the white Gaussian noise from input and output signals on frequency response estimation.The proposed method can accurately estimate the frequency response of the current transformer.Simulation and practical test results have verified the usefulness of the proposed method.
朱亮,温和,马建,张春强,金冉. 多频率同步的电流互感器Hn-ave估计方法[J]. 电工技术学报, 2017, 32(17): 111-118.
Zhu Liang, Wen He, Ma Jian, Zhang Chunqiang, Jin Ran. Hn-ave Frequency Response Estimation of Current Transformer with Synchronized Multi-Frequency Signal. Transactions of China Electrotechnical Society, 2017, 32(17): 111-118.
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2017, Vol. 32 
