Impacts of Control Parameters on Small-Signal Stability in a Hybrid-Synchronization-Based Grid-Connected Inverter System

2023 International Conference on Power Energy Systems and Applications (ICoPESA) Pub Date : 2023-02-24 DOI:10.1109/ICoPESA56898.2023.10140438

Haojin Lin, Xiao-zhi Qiu, Xing Yan, Yi Zhou, Yiwei Qiu, Buxiang Zhou, Gang Chen

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Abstract

Recently, a hybrid synchronization control (HSC) that integrates phase locked loop (PLL) into the power synchronization control (PSL) is proposed. Some research results have clarified the HSC-based has better transient stability performance. However, impacts of control parameters on the small-signal stability in an HSC-based grid-connected inverter system is unclear under different grid strengths, which is inconvenient to design of parameters. As a result, in this paper, a full-order state-space model of the HSC-based grid-connected inverter system is built. Furthermore, by using eigenvalues analysis method, influence laws of main control parameters on small-signal stability in the HSC-based grid-connected inverter system are revealed under different grid strengths. Finally, the correctness of theoretical analysis is verified by time-domain simulation in MATLAB/Simulink. This work is hoped to provide a design orientation of parameters in HSC-based inverters for maintaining expected margin of small-signal stability under different grid strengths.

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控制参数对混合同步并网逆变器系统小信号稳定性的影响

近年来，提出了一种将锁相环(PLL)集成到功率同步控制(PSL)中的混合同步控制(HSC)。一些研究结果表明，hsc基具有较好的暂态稳定性能。然而，在不同电网强度下，控制参数对hsc型并网逆变器系统小信号稳定性的影响尚不清楚，给参数设计带来不便。因此，本文建立了基于hsc的并网逆变器系统的全阶状态空间模型。利用特征值分析方法，揭示了不同电网强度下，主要控制参数对hsc型并网逆变器系统小信号稳定性的影响规律。最后，通过MATLAB/Simulink中的时域仿真验证了理论分析的正确性。本研究为基于hsc的逆变器在不同电网强度下保持预期的小信号稳定裕度提供了参数设计方向。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2023 International Conference on Power Energy Systems and Applications (ICoPESA)

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