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基于谐波阻抗匹配的微电网互联线路谐振分析及抑制措施
作者:
作者单位:

1.天津大学电气自动化与信息工程学院,天津市 300072;2.国网辽宁省电力有限公司经济技术研究院,辽宁省沈阳市 110015

摘要:

相邻微电网之间往往通过长距离的输电线路互联。针对这类输电线路双端存在独立谐波源的系统,其谐波交互特性与谐波放大机理更为复杂,采用传统阻性有源电力滤波器方法抑制谐振并不适用。文中基于传输线理论分析互联线路的谐波传播机理,并提出基于谐波阻抗匹配的谐振抑制方案。为了克服线路参数与谐波源相角信息的不确定性,提出基于线路中点谐波电压检测的有源电力滤波器谐波阻抗协调控制策略,根据谐波电压含量在线调节线路两端谐波阻抗相角,实现谐振抑制目标。与此同时,提出一种有源电力滤波器改进控制策略,保证其谐波阻抗相角可以任意调节。仿真验证了控制策略的有效性。

关键词:

基金项目:

国家重点研发计划资助项目(2017YFB0902000);国家电网公司科技项目(SGXJ0000KXJS1700841)。

通信作者:

作者简介:

梁倍华(1991—),男,博士研究生,主要研究方向:微电网电能质量治理、分布式电源控制。E-mail:Eli_tju@163.com
何晋伟(1983—),男,通信作者,博士,教授,博士生导师,主要研究方向:电能质量控制、大功率电力电子变流器。E-mail:jinwei.he@tju.edu.cn
金子开(1990—),男,硕士,工程师,主要研究方向:电力系统稳定控制、变电设计。E-mail:jkl2010abc@163.com


Analysis and Suppression Measures for Resonance on Interconnection Line Between Mircogrids Based on Harmonic Impedance Matching
Author:
Affiliation:

1.School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China;2.State Grid Liaoning Electric Power Company Limited Economic Research Institute, Shenyang 110015, China

Abstract:

Neighboring microgrids are usually interconnected by long transmission lines. For the system where both sending and receiving ends of transmission lines have independent harmonic sources, the harmonic interaction characteristic and the harmonic amplification mechanism are more complicated, and the conventional resonance suppression method of resistive active power filter is not suitable. Based on the transmission line theory, this paper analyzes the harmonic propagation mechanism of interconnected lines, and proposes a resonance suppression method based on harmonic impedance matching. To overcome the uncertainty of line parameters and phase angle information of harmonic sources, this paper proposes a coordinated control method for harmonic impedances of active power filters based on the line middle-point harmonic voltage detection. According to the harmonic voltage content, the phase angles of harmonic impedance at both ends of the line are adjusted online to realize resonance suppression. Meanwhile, an improved control strategy of active power filters is proposed to ensure that the harmonic impedance phase angle can be adjusted arbitrarily. Simulation results verify the effectiveness of the proposed scheme.

Keywords:

Foundation:
This work is supported by National Key R&D Program of China (No. 2017YFB0902000) and State Grid Corporation of China (No. SGXJ0000KXJS1700841).
引用本文
[1]梁倍华,何晋伟,金子开,等.基于谐波阻抗匹配的微电网互联线路谐振分析及抑制措施[J].电力系统自动化,2021,45(14):123-131. DOI:10.7500/AEPS20200623004.
LIANG Beihua, HE Jinwei, JIN Zikai, et al. Analysis and Suppression Measures for Resonance on Interconnection Line Between Mircogrids Based on Harmonic Impedance Matching[J]. Automation of Electric Power Systems, 2021, 45(14):123-131. DOI:10.7500/AEPS20200623004.
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  • 收稿日期:2020-06-23
  • 最后修改日期:2020-11-08
  • 录用日期:
  • 在线发布日期: 2021-07-21
  • 出版日期:
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