| 引用本文: | 金国彬,尹广涵,李 玲,等.基于运行模式切换的强抗扰并网变流器控制策略[J].电力系统保护与控制,2026,54(08):93-103. |
| JIN Guobin,YIN Guanghan,LI Ling,et al.Robust disturbance-rejection control strategy for grid-connected converters based on operation mode switching[J].Power System Protection and Control,2026,54(08):93-103 |
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| 摘要: |
| 针对并网变流器在网侧三相对称短路故障时难以兼顾暂态同步稳定性与故障穿越能力这一问题，提出基于
运行模式切换的强抗扰并网变流器控制策略。首先，设计了基于虚拟振荡器锁相环的跟网型稳态控制方法。针对
三相对称短路故障，融合虚拟同步技术、虚拟阻抗及电流限幅策略，设计了构网型交叉控制方法。同时，根据稳
态和短路故障期间变流器输出电流的幅值大小差异，设计两种运行模式的切换控制方法。借助虚拟振荡器的相位
跳变扰动抑制能力，通过采用相位继承方式，实现并网系统“稳态-故障”模式暂态同步稳定的平滑过渡。所提出
的控制策略可以使并网系统在三相短路故障场景下的动态响应速度得到提升，限流环节可以合理限制三相短路故
障期间变流器网侧输出电流幅值，避免变流器过流闭锁。最后，所提控制策略的有效性均在 MATLAB/Simulink
仿真和RT-LAB 实时数字仿真平台进行了全面验证。 |
| 关键词: 并网变流器 虚拟振荡器锁相环 故障穿越 暂态稳定性 短路电流限制 |
| DOI：10.19783/j.cnki.pspc.251004 |
| 分类号: |
| 基金项目:国家重点研发计划项目 (2021YFB2400900) |
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| Robust disturbance-rejection control strategy for grid-connected converters based on operation mode switching |
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JIN Guobin, YIN Guanghan, LI Ling, LI Guoqing, YANG Mingcheng, XIN Yechun
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Laboratory of Modern Power System Simulation Control and Green Energy New Technology, Ministry of Education (Northeast Electric Power University), Jilin 132012, China
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| Abstract: |
| To address the challenge that grid-connected converters struggle to simultaneously maintain transient synchronization stability and fault ride-through capability during three-phase symmetrical short-circuit faults, this paper proposes a robust disturbance-rejection control strategy based on operating mode switching. A grid-following steady-state control method based on virtual oscillator phase-locked loop and a grid-forming cross-control method integrating virtual synchronous generator technology, virtual impedance, and current limiting strategies are designed. Smooth switching is realized according to current amplitude, which improves dynamic response speed and limits short-circuit current to avoid overcurrent blocking. |
| Key words: grid-connected converter virtual oscillator phase-locked loop fault ride-through transient stability short-circuit current limitation |
