An enhancement method ensuring robust passive impedance of LCL-type grid connected converter

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-02-07 DOI:10.1016/j.epsr.2025.111486

Gengning Ying , Jun Zeng , Minhai Wu , Ningrui Yang , Jie Song , Junfeng Liu , Zhixing Yan

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引用次数: 0

Abstract

Voltage source converters are essential in renewable energy power systems. For LCL-type voltage source converters, the stable operation of itself can be ensured through proper active damping control. However, the impedance interaction with a weak grid can further threaten the stability. To overcome this, shaping a passive output impedance of a converter is an effective and promising solution for power system to integrate more renewables energies. Traditional ideal passivity shaping methods have limited margins and can be sensitive to time delays or parameter fluctuations, posing instability risks in practical operation. To this end, a passivity enhancement method is proposed to ensure a robust passive output impedance of the converter in this article. It can be used to compensate for the vulnerable region of the passive output impedance. First, the risk of ideal passivity control is analyzed. Next, the principle and structure of the passivity enhancement method are presented. Furthermore, the parameter design methods and procedure are studied, followed by a practical design example. Finally, the effectiveness of the proposed method is verified by experimental results.

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.