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1.浙江大学电气工程学院,浙江省杭州市 310027
2.中国大唐集团科技创新有限公司,河北省保定市 070001
冷若寒(2001—),男,硕士研究生,主要研究方向:高比例新能源电力系统稳定性分析和控制。E-mail:lengruohan@zju.edu.cn
殷波(1979—),女,硕士,高级工程师,主要研究方向:电力电子和电能质量。E-mail:bywhu@hotmail.com
胡光(1999—),男,博士研究生,主要研究方向:高比例新能源电力系统稳定性分析和控制。E-mail:huguang@zju.edu.cn
辛焕海(1981—),男,通信作者,教授,主要研究方向:高比例电力电子装备电力系统稳定性分析和控制。E-mail:xinhh@zju.edu.cn
收稿:2024-05-12,
修回:2024-08-29,
网络出版:2025-03-18,
纸质出版:2025-04-10
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冷若寒,殷波,胡光等.对偶视角下基于特征子系统的跟网/构网互联系统强度评估[J].电力系统自动化,2025,49(7):103-114.
LENG Ruohan,YIN Bo,HU Guang,et al.System Strength Evaluation of Grid-following and Grid-forming Interconnected System Based on Eigen-subsystem from Dual Perspective[J].Automation of Electric Power Systems,2025,49(7):103-114.
冷若寒,殷波,胡光等.对偶视角下基于特征子系统的跟网/构网互联系统强度评估[J].电力系统自动化,2025,49(7):103-114. DOI: 10.7500/AEPS20240512001.
LENG Ruohan,YIN Bo,HU Guang,et al.System Strength Evaluation of Grid-following and Grid-forming Interconnected System Based on Eigen-subsystem from Dual Perspective[J].Automation of Electric Power Systems,2025,49(7):103-114. DOI: 10.7500/AEPS20240512001.
跟网、构网互联系统中各类设备交互作用明显,如何准确量化互联系统强度面临挑战。为此,首先从对偶视角探讨了跟网、构网系统闭环稳定性与开环网络灵敏度的匹配关系,并基于此引入了反映电流刚性的电网强度指标。然后,解析得到了与高维互联系统稳定性等价的低维跟网、构网特征子系统,并基于此提出了互联电力系统强度二维指标。该指标同时反映跟网、构网特征子系统的稳定裕度,从而实现了互联系统多频段小扰动稳定性的有效评估。结合该指标,得出了电力系统适度互联形态有利于同时降低跟网、构网失稳风险的推论。最后,仿真验证了所提方法的有效性及推论的正确性。
The significant interactions between devices in grid-following and grid-forming interconnected systems present challenges in accurately quantifying system strength. To address this
firstly
the matching relationship between the closed-loop stability of grid-following and grid-forming systems and the open-loop network sensitivity from a dual perspective is discussed. Based on this
a power grid strength index reflecting current strength is introduced.Furthermore
the low-dimensional grid-following and grid-forming eigen-subsystems equivalent to the stability of the high-dimensional interconnected system are analytically obtained. Based on this
a two-dimensional index of the strength of the interconnected power system is proposed. This index can reflects the stability margins of both the grid-following and grid-forming eigen-subsystems simultaneously
thus enabling the effective assessment of the multi-frequency-band small-disturbance stability of the interconnected system. Combined with this index
the inference is drawn that an appropriate interconnected form of the power system is conducive to instability risk reduction of an both the grid-following and grid-forming systems simultaneously. Finally
simulations verify the effectiveness of the proposed method and the correctness of the inference.
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