Stability assessment of inverter‐based renewable energy sources integrated to weak grids

IF 1.6 Q4 ENERGY & FUELS
M. I. Saleem, S. Saha, U. Izhar, L. Ang
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引用次数: 0

Abstract

The worldwide electricity network is undergoing a crucial transformation, shifting from traditional synchronous generators to inverter‐based renewable energy sources (IRESs). This shift is expected to reduce the grid's available fault level (AFL), potentially impacting grid functionality, particularly during the integration of IRESs into weak grids. This paper examines the challenges associated with weak grids, focusing on the steady‐state and dynamic stability of IRES when integrated into these systems. In the steady‐state analysis, the effects of AFL, injected power volume, and grid characteristics on the steady‐state voltage at the point of interconnection were explored. For dynamic stability, eigenvalue and H2 norm analyses are used for evaluation. Sensitivity analysis is conducted to assess the impact of these factors on the stability of IRESs connected to weak grids. A detailed case study using the IEEE 39 bus test power system is included to demonstrate our findings, where the steady‐state and dynamic stability of IRES connected to the test system are assessed using the proposed methods. The accuracy of these analyses is confirmed by extensive simulation studies on the OPAL‐RT real‐time digital simulator platform.
基于逆变器的可再生能源并入弱电网的稳定性评估
全球电网正在经历一场关键的变革,从传统的同步发电机转向基于逆变器的可再生能源(IRES)。预计这一转变将降低电网的可用故障水平(AFL),从而对电网功能造成潜在影响,尤其是在将 IRES 并入弱电网期间。本文探讨了与弱电网相关的挑战,重点关注集成到这些系统中的 IRES 的稳态和动态稳定性。在稳态分析中,探讨了 AFL、注入功率和电网特性对互联点稳态电压的影响。在动态稳定性方面,采用了特征值和 H2 准则分析进行评估。还进行了敏感性分析,以评估这些因素对连接到弱电网的 IRES 稳定性的影响。我们还利用 IEEE 39 总线测试电力系统进行了详细的案例研究,利用所提出的方法评估了连接到测试系统的 IRES 的稳态和动态稳定性。在 OPAL-RT 实时数字仿真器平台上进行的大量仿真研究证实了这些分析的准确性。
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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来源期刊
IET Energy Systems Integration
IET Energy Systems Integration Engineering-Engineering (miscellaneous)
CiteScore
5.90
自引率
8.30%
发文量
29
审稿时长
11 weeks
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