| 引用本文: | 戴天辰,刘 云,朱继忠,等.计及无功支撑特性的新能源多馈入系统小干扰电压支撑强度评估[J].电力系统保护与控制,2026,54(02):24-35.[点击复制] |
| DAI Tianchen,LIU Yun,ZHU Jizhong,et al.Small-signal voltage support strength assessment of renewable energy multi-infeed systems incorporating reactive power support characteristics[J].Power System Protection and Control,2026,54(02):24-35[点击复制] |
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| 摘要: |
| 高比例新能源多馈入系统(简称多馈入系统)中，电力电子变流器的大规模接入会引发一系列小干扰稳定问题，而系统电压支撑强度(简称系统强度)评估是分析此类问题的重要手段。针对现有研究忽略变流器无功支撑特性及实际运行工况的不足，提出一种面向多馈入系统的小干扰稳定性分析与强度评估方法。首先，建立计及无功支撑特性及实际运行工况的多馈入系统小干扰模型。其次，采用参与因子加权法构建等效同构多馈入系统。进而，基于模态解耦理论推导等效单馈入系统，以表征多馈入系统的小干扰稳定性。最后，提出计及无功支撑特性的系统强度评估指标，针对变流器控制结构和参数已知的白盒模型以及控制结构和参数未知的黑盒模型，分别设计相应的系统强度评估量化流程。仿真算例结果表明，所提出的方法能准确评估系统强度，且具有较好的工程适用性。 |
| 关键词: 多馈入系统 系统强度 运行工况 无功支撑 黑盒模型 |
| DOI：10.19783/j.cnki.pspc.250476 |
| 投稿时间：2025-05-06修订日期：2025-08-24 |
| 基金项目:国家自然科学基金项目资助(52577110)；广东省自然科学基金项目资助(2025A1515010653) |
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| Small-signal voltage support strength assessment of renewable energy multi-infeed systems incorporating reactive power support characteristics |
| DAI Tianchen,LIU Yun,ZHU Jizhong,LAI Xiang |
| (School of Electric Power, South China University of Technology, Guangzhou 510640, China) |
| Abstract: |
| In high-penetration renewable energy multi-infeed systems (multi-infeed systems), large-scale integration of power electronic converters may lead to small-signal stability issues. Assessing system voltage support strength (system strength) is a critical tool for analyzing such problems. To address the limitations of existing researches that often neglect the reactive power support characteristics of converters and actual operating conditions, this paper proposes a small-signal stability analysis and system strength evaluation method for multi-infeed systems. First, a small-signal model of the multi-infeed system is established, incorporating both reactive power support characteristics and actual operating conditions. Second, an equivalent homogeneous multi-infeed system is constructed using the participation factor weighting method. Furthermore, based on modal decoupling theory, an equivalent single-infeed system is derived to characterize the small-signal stability of the multi-infeed system. Finally, a system strength evaluation metric accounting for reactive power support is proposed, and quantitative evaluation procedures are designed for both white-box models (with known control structures and parameters) and black-box models (with unknown control structures and parameters). Simulation results demonstrate that the proposed method can accurately evaluate system strength and exhibits good engineering applicability. |
| Key words: multi-infeed systems system strength operating condition reactive power support black-box model |
