电流物理分量理论改进方法及其在电能质量评估中的应用

doi:10.19595/j.cnki.1000-6753.tces.L80213

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摘要随着现代电力系统的不断发展,电源特性、电网络结构和负荷类型及其构成正在发生着巨大变化,电流引发的电能质量问题越来越突出,而已有方法难以对电流扰动量进行全面评估。为此,该文提出了一种改进的电流物理分量理论,包括工作电流、基波主导无功电流、基波主导负序电流、基波主导零序电流以及谐波电流分量。该方法适用于各种系统条件,并能够全面地针对电流做功效率、不平衡及谐波等物理现象进行量化。在分析电流质量评估关键问题与指标的基础上,研究了改进电流物理分量理论在电力扰动源支路或其集总支路上的电流质量评估中的应用,最后通过对物理实验与工程实测数据的评估验证了所提出方法的可行性与实用性。

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	陶顺
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关键词 ：电能质量, 电流质量, 电流物理分量理论, 评估指标

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.

Key words： Power quality current quality current physical component assessment indices

收稿日期: 2018-06-29 出版日期: 2019-05-14

PACS:

TM73

基金资助:国家自然科学基金青年科学基金资助项目（51207051）

作者简介: 陶顺女,1972年生,博士,副教授,研究方向为有源智能配电网及其电能质量分析与控制。E-mail：tao_shun@ncepu.edu.cn通信作者：罗超男,1987年生,博士研究生,研究方向为电力系统次同步振荡。E-mail：ceeelch@126.com

引用本文:

陶顺, 罗超, 肖湘宁, 陈聪. 电流物理分量理论改进方法及其在电能质量评估中的应用[J]. 电工技术学报, 2019, 34(9): 1960-1970. Tao Shun, Luo Chao, Xiao Xiangning, Chen Cong. A Modified Current Physical Components Theory and Its Application in Power Quality Assessment. Transactions of China Electrotechnical Society, 2019, 34(9): 1960-1970.

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