Area-based stability analysis method of grid-connected converter under wide operating conditions

IF 5 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Electrical Power & Energy Systems Pub Date : 2024-10-29 DOI:10.1016/j.ijepes.2024.110318

Yuting Zheng, Fan Xiao, Weijie Xie, Chunming Tu, Qi Guo

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引用次数: 0

Abstract

Grid-connected converters (GCCs) exhibit diverse stability characteristics at different operating points. However, traditional stability analysis methods usually study the stability of GCC at a specific operating point. To analyze the stability under time-varying operation conditions, this paper proposes an area-based stability analysis method. Firstly, operating point variables are introduced by the coordinate transformation relationship in phase-locked loop (PLL). Secondly, the small-signal model of GCC considering the coupling between PLL and current control is built. Based on the built model, the stable operation domain can be obtained. The stability of the system can be quickly determined by the relative position of the operating point to the stable boundary. Then, the mechanisms of impedance parameters and control parameters on the stable domain are analyzed to improve the stability of GCC. Finally, the effectiveness and correctness of the proposed area-based stability analysis method are verified by simulation and experiment.

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宽工作条件下基于区域的并网变流器稳定性分析方法

并网变流器（GCC）在不同工作点表现出不同的稳定性特征。然而，传统的稳定性分析方法通常研究 GCC 在特定工作点的稳定性。为了分析时变运行条件下的稳定性，本文提出了一种基于区域的稳定性分析方法。首先，通过锁相环（PLL）中的坐标变换关系引入工作点变量。其次，考虑到 PLL 与电流控制之间的耦合，建立了 GCC 的小信号模型。根据建立的模型，可以获得稳定的运行域。通过工作点与稳定边界的相对位置，可以快速确定系统的稳定性。然后，分析阻抗参数和控制参数对稳定域的影响机制，以提高 GCC 的稳定性。最后，通过仿真和实验验证了所提出的基于区域的稳定性分析方法的有效性和正确性。

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来源期刊

International Journal of Electrical Power & Energy Systems 工程技术-工程：电子与电气

CiteScore

12.10

自引率

17.30%

发文量

1022

审稿时长

51 days

期刊介绍： The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces. As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.