| 引用本文: | 纪昊含,张扬帆,陈磊,刘京波,闵勇.跟网型与构网型变流器混合系统中扰动功率的分阶段分配[J].电力自动化设备,2025,45(7):129-137 |
| JI Haohan,ZHANG Yangfan,CHEN Lei,LIU Jingbo,MIN Yong.Staged allocation of disturbance power in hybrid system of grid-following converters and grid-forming converters[J].Electric Power Automation Equipment,2025,45(7):129-137 |
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| 摘要: |
| 新型电力系统中电力电子设备广泛参与频率调节，包括附加频率控制的跟网型变流器与构网型变流器，其扰动后承担扰动功率的过程对系统频率动态至关重要。基于传统同步发电机功率分配三阶段理论，通过分析构网型、无附加控制跟网型、附加频率控制跟网型变流器与同步发电机在扰动功率分配过程、频率支撑过程方面的异同，推导了考虑暂态频率空间分布的混合系统有功-频率闭环响应过程，提出了混合系统扰动功率分阶段分配理论并通过仿真验证了理论的正确性。研究结果表明，考虑延时情况下带附加综合惯量控制的跟网型与构网型变流器混合系统功率分配存在4个阶段，跟网型变流器惯量响应开始时混合系统进入闭环过程，该阶段系统功率分配受电力网络和各设备虚拟惯量共同影响。 |
| 关键词: 跟网型变流器 构网型变流器 附加频率控制 虚拟同步机 扰动功率分配 频率空间分布 |
| DOI：10.16081/j.epae.202506002 |
| 分类号: |
| 基金项目:国家电网有限公司科技项目(5108-202218280A-2-306-XG) |
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| Staged allocation of disturbance power in hybrid system of grid-following converters and grid-forming converters |
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JI Haohan1, ZHANG Yangfan2, CHEN Lei1, LIU Jingbo2, MIN Yong1
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1.State Key Laboratory of Power System Operation and Control, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;2.Electric Power Institute of State Grid Jibei Electric Power Co.,Ltd.,Beijing 100045, China
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| Abstract: |
| In new energy-based power systems, power electronic devices widely participate in frequency regulation, including grid-following(GFL) converters with additional frequency control and grid-forming(GFM) converters. The process of these devices sharing disturbance power after disturbances is crucial for system frequency dynamics. Based on the three-stage power distribution theory of traditional synchronous generators(SGs),the similarities and differences in the disturbance power distribution and frequency support processes of GFM converters, GFL converters without additional control, GFL converters with additional frequency control, and SGs are analyzed. The active power-frequency closed-loop response process of hybrid system considering transient frequency spatial distribution is derived, and a staged power distribution theory for disturbance power in hybrid system is proposed, which is verified by simulations. The research results show that there are four stages in the power distribution of hybrid system consisting of GFL converters with additional integrated inertia control and GFM converters when considering delays. When the inertia response of GFL converters starts, the hybrid system enters the closed-loop process, and the power distribution in this stage is jointly influenced by the power network and the virtual inertia of each device. |
| Key words: grid-following converter grid-forming converter additional frequency control virtual synchronous generator disturbance power distribution spatial distribution of frequency |
