Niancheng Zhou

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The influence of electric vehicle charging stations on power grid harmonics is becoming increasingly significant as their presence continues to grow. This paper studies the operational principles of the charging current in the continuous and discontinuous modes for a three-phase uncontrolled rectification charger with a passive power factor correction link,(More)
 Abstract—Error estimation of the metering system of electric energy is an effective means to discover potential hazards of measurement devices of power energy, which consist of watt-hour meter, current transformer (CT), voltage transformer (VT), and secondary circuits. Metering errors from watt-hour meter and secondary circuits can be monitored online,(More)
Niancheng Zhou 1, Fan Ye 1,*, Qianggang Wang 1,2, Xiaoxuan Lou 1,3 and Yuxiang Zhang 2 1 State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China; (N.Z.); (Q.W.); (X.L.) 2 School of Electricaland Electronic(More)
Unbalanced grid faults will lead to several drawbacks in the output power quality of photovoltaic generation (PV) converters, such as power fluctuation, current amplitude swell, and a large quantity of harmonics. The aim of this paper is to propose a flexible AC current generation method by selecting coefficients to overcome these problems in an optimal(More)
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