A Modified Current Physical Components Theory and Its Application in Power Quality Assessment
Tao Shun1, Luo Chao2, Xiao Xiangning1, Chen Cong3
1. State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China; 2. Electric Power Research Institute China Southern Power Grid Guangzhou 510663 China; 3. State Grid Electric Power Research Institute of Hangzhou Electric Power Company Hangzhou 310016 China
Abstract With the rapid development of the modern power system, the power supplies, the power network and the loads have taken great changes, and power quality problems caused by current become more and more prominent. The existing method is difficult to evaluate the current disturbance. In this paper, a modified current physical components power theory was proposed, which includes working current, reactive current dominated by fundamental frequency, negative sequence current dominated by fundamental frequency, zero sequence current dominated by fundamental frequency, and harmonic current. The proposed method is applicable to all kind of system characteristic, quantify the phenomena of work-efficiency, unbalance and harmonic. Based on analysis results of key issues and indices for current quality assessment, the application of the proposed method in the current quality assessment was studied. Feasibility and effectiveness were verified by the physical experiment and the assessment of the measured current data from a steel plant with the electric arc furnace load.
Tao Shun,Luo Chao,Xiao Xiangning等. A Modified Current Physical Components Theory and Its Application in Power Quality Assessment[J]. Transactions of China Electrotechnical Society, 2019, 34(9): 1960-1970.
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2019, Vol. 34 
