电气工程学报 ›› 2019, Vol. 14 ›› Issue (2): 86-91.doi: 10.11985/2019.02.015

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配电网中谐波传递特性研究 *

安海清1,岳娜1,李振动1,金海望1,田凯哲1,李金卜1,华回春1   

  1. 1. 国网冀北电力有限公司检修分公司 北京 102488
    2. 华北电力大学数理学院 保定 071003
  • 收稿日期:2019-03-21 出版日期:2019-06-25 发布日期:2019-10-25
  • 作者简介:安海清,男,1990年生,工程师。主要研究方向为电能质量分析与控制等。E-mail:245932206@qq.com。|岳娜,女,1989年生,工程师。主要研究方向为电能质量分析与控制等。
  • 基金资助:
    * 中央高校基本科研业务费专项资金资助项目(2017MS197)

Research on Harmonic Transfer Characteristics in Distribution Network

AN Haiqing1,YUE Na1,LI Zhendong1,JIN Haiwang1,TIAN Kaizhe1,LI Jinbo1,HUA Huichun1   

  1. 1. State Grid Jibei Electric Power Company Limited Maintenance Branch Company, Beijing 102488 China
    2. School of Mathematics and Physics,North China Electric Power University, Baoding 071003 China
  • Received:2019-03-21 Online:2019-06-25 Published:2019-10-25

摘要:

从谐波电流和谐波电压两个方面研究了谐波在配电网中的传递特性,通过公式推导分析了谐波电流在相同和不同电压等级系统中的传递规律。在未投入滤波装置时,谐波电流主要流入上级系统;而当谐波电流注入上级系统后,从低压侧向高压侧传递时,传递系数与变压器电压比有关。详细分析了上级电网谐波电压向本级电网负荷侧的传递过程,结果表明上级电网的谐波电压在配电网中传递时主要集中在本级电网的负荷等效阻抗上;投入滤波器后,上级电网的谐波电压传递主要集中在本级电网的系统阻抗上。最后通过算例仿真验证了结论的准确性。

关键词: 配电网, 谐波电流, 谐波电压, 谐波传递特性, 滤波器

Abstract:

The harmonic transfer characteristics in the distribution network are analyzed from two aspects of harmonic current and harmonic voltage. The transfer law of harmonic current in the same and different voltage level systems is analyzed by formula. The analysis results show that the harmonic current mainly flows into the upper system when the filter device is not input. The transmission coefficient is related to the transformer ratio when the wave current is injected into the upper system and transmitted from the low pressure side to the high pressure. The transmission process of the harmonic voltage of the upper power grid to the load side of the power grid is analyzed in detail and the conclusion is drawn. The harmonic voltage of the higher-level power grid is mainly concentrated on the load equivalent impedance of the current-level power grid when passing through the distribution network. When the harmonic filter voltage of the upper-level power grid is mainly transmitted, the system is mainly concentrated on the system of the current-level power grid. The accuracy of the conclusions is verified by numerical simulation.

Key words: Distribution network, harmonic current, harmonic voltage, harmonic transfer characteristics, filter

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