| 引用本文: | 王莉虹,肖先勇,张逸,汪颖,陈飞宇.非线性负荷谐波贡献畸变功率评估指标与方法[J].电力系统保护与控制,2017,45(9):41-47.[点击复制] |
| WANG Lihong,XIAO Xianyong,ZHANG Yi,WANG Ying,CHEN Feiyu.A distortion power based assessment index and method of harmonic contribution of nonlinear loads[J].Power System Protection and Control,2017,45(9):41-47[点击复制] |
|
| 摘要: |
| 以谐波电压或谐波电流为依据的现有谐波贡献度评估指标对电网侧和用户侧阻抗参数敏感，对特定情况有效，但普适性不强。针对这一问题，从电力系统是电能量转换和传输系统的实质出发，研究电压或电流畸变条件下电功率流的物理机制。基于坡印廷矢量分析法，比较现有不同畸变功率的定义，提出一种基于非基波视在功率的多谐波源贡献度量化指标，并结合电流矢量法进行了求解算法研究。通过理论仿真和实验测试，并与传统的电压、电流指标评估结果进行比较，证明了所提贡献度评估指标的合理性和可行性。 |
| 关键词: 坡印廷矢量 畸变功率 谐波贡献 评估指标 电流矢量法 |
| DOI：10.7667/PSPC160588 |
| 投稿时间：2016-04-25修订日期：2016-07-11 |
| 基金项目:国家电网公司资助项目(SGRI-DL-71-15-006) |
|
| A distortion power based assessment index and method of harmonic contribution of nonlinear loads |
| WANG Lihong,XIAO Xianyong,ZHANG Yi,WANG Ying,CHEN Feiyu |
| (School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China;State Grid Fujian Electric Power Company Electric Power Research Institute, Fuzhou 350000, China) |
| Abstract: |
| Current harmonic voltage or current based assessment index of harmonic contribution is sensitive to harmonic impedance of utility side and customer side and it's available only for special cases. In order to solve this problem, this paper, which bases itself on the fact that the essence of power system is electric energy conversion and transmission, studies the physical mechanism of power flow when voltage and current are distorted and uses Poynting vector to compare different definition of distortion power. Then a nonfundamental apparent power based index is proposed to assess harmonic contribution of multi-harmonic sources and detail studies on calculating algorithm are explored with the help of current vector method. The proposed index is verified by theoretical simulation and laboratory test, and the assessment results of harmonic contribution by the proposed index are compared with those by conventional index with voltage and current. Comparison results show that the proposed index in this paper is rational and feasible. This work is supported by the State Grid Corporation of China (No. SGRI-DL-71-15-006). |
| Key words: Poynting vector distortion power harmonic contribution assessment index current vector method |
