| 引用本文: | 张浩,李辉,谭宏涛,郑杰,张振,向学位.基于惯性同步的构网型永磁风电机组暂态控制改进策略[J].电力自动化设备,2025,45(12):145-152. |
| ZHANG Hao,LI Hui,TAN Hongtao,ZHENG JIE,ZHANG Zhen,XIANG Xuewei.Improved transient control strategy for grid-forming permanent magnet wind turbine based on inertial synchronization[J].Electric Power Automation Equipment,2025,45(12):145-152. |
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| 摘要: |
| 惯性同步控制可通过机网侧控制逻辑维持永磁风电机组构网运行，但在暂态工况下存在直流电压越限导致的惯性同步失效和暂态过流冲击问题。为此，提出一种改进的暂态控制策略，以兼顾惯性同步并网有效性与过流抑制。增加直流电压-机侧有功功率下垂环路，考虑电压波动约束与功角曲线特性整定控制系数，使得机侧主动减载以维持直流电压稳定并保持惯性同步控制不失效；基于调制与限流双重约束重构等效内电势以抑制过流稳态周期分量，再结合反正切函数与电流越限边界设计自适应虚拟阻抗以抑制暂态直流分量。基于半实物实验平台验证所提策略的有效性，结果表明，在电网电压对称跌落时，所提策略可有效保障直流电压稳定和惯性同步控制有效，同时将暂态过电流限制在变流器电流上限与调制极限约束内。 |
| 关键词: 永磁风电机组 惯性同步控制 暂态稳定 过电流限制 自适应虚拟阻抗 风电 |
| DOI：10.16081/j.epae.202510021 |
| 分类号: |
| 基金项目:重庆市科技创新重大研发项目资助(CSTB2024TIAD-STX0019) |
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| Improved transient control strategy for grid-forming permanent magnet wind turbine based on inertial synchronization |
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ZHANG Hao1, LI Hui1, TAN Hongtao2, ZHENG JIE1,3, ZHANG Zhen1, XIANG Xuewei1
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1.State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, Chongqing 400044, China;2.Dongfang Electric Autocontrol Engineering Co.,Ltd.,Deyang 618030, China;3.CSSC Haizhuang Windpower Co.,Ltd.,Chongqing 401123, China
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| Abstract: |
| The inertial synchronization control can maintain grid-forming operation of permanent magnet wind turbine through machine-grid side control logic. However, there exists problems of inertial synchronization failure caused by DC voltage over-limit and transient overcurrent impact. Therefore, an improved transient control strategy is proposed, which considers the effectiveness of inertial synchronous grid connection and overcurrent suppression. A DC voltage-machine-side active power droop loop is added, and the control coefficients are tuned considering voltage fluctuation constraints and power angle characteristic, so that the machine side actively reduces load to maintain DC voltage stability and keep the inertial synchronization control from failure. The equivalent internal potential is reconstructed based on dual constraints of modulation and current limitation to suppress the steady-state periodic component of overcurrent, and an adaptive virtual impedance is designed by combining the arctangent function and current over-limit boundary to suppress the transient DC component. The effectiveness of the proposed strategy is verified based on a hardware-in-the-loop experimental platform, and the results show that the proposed strategy can effectively gurantee stable DC voltage and effective inertial synchronization control when the grid voltage drops symmetrically, and at the same time limit the transient overcurrent within the constraints of converter current upper limit and modulation limit. |
| Key words: permanent magnet wind turbine inertial synchronization control transient stability overcurrent limitation adaptive virtual impedance wind power |
