| 引用本文: | 邓鑫隆,邱存勇,杨轶航,陈梓桐.基于自适应PI的构网型变流器预同步控制策略[J].电力自动化设备,2026,46(2):120-127. |
| DENG Xinlong,QIU Cunyong,YANG Yihang,CHEN Zitong.Pre-synchronization control strategy of grid-forming converter based on adaptive PI[J].Electric Power Automation Equipment,2026,46(2):120-127. |
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| 摘要: |
| 在构网型变流器并网过程中，预同步速度和电能质量往往不可兼得。为了解决这一问题，对基于电压dq解耦的预同步原理进行深入分析，指出其存在的缺陷，并通过移相、引入补偿项、取反等方法消除零点，缩短预同步路径；构建考虑角频率补偿的频率偏差小信号模型，分析阻尼系数、惯性、小惯性环节时间常数和角频率补偿量对频率偏差的影响，得到极限角频率补偿量，减小参数设计的难度；分析控制器参数对预同步速度和频率偏差的影响，在此基础上，提出一种平衡预同步速度和频率偏差的自适应预同步控制策略。通过MATLAB/Simulink仿真实验验证所提预同步控制策略的有效性。仿真结果表明，所提策略能够在满足预同步过程频率不越限的前提下，显著提高预同步速度。 |
| 关键词: 构网型控制 预同步 变流器 频率偏差 同步速度 自适应PI |
| DOI：10.16081/j.epae.202507008 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51607151) |
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| Pre-synchronization control strategy of grid-forming converter based on adaptive PI |
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DENG Xinlong, QIU Cunyong, YANG Yihang, CHEN Zitong
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School of Electrical Engineering and Information, Southwest Petroleum University, Chengdu 610500, China
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| Abstract: |
| In the grid-connection process of grid-forming converter, pre-synchronization speed and power quality are often not available simultaneously. In order to solve this problem, the pre-synchronization principle based on voltage dq decoupling is analyzed in depth, and its defects are pointed out. The zero point is eliminated by methods of phase shifting, compensation term injection and polarity reversal, and the pre-synchronization path is reduced. The small signal model of frequency difference considering angular frequency compensation is constructed. The influence of damping coefficient, inertia, time constant of small inertia link and angular frequency compensation on frequency difference is analyzed, and the limit angular frequency compensation is obtained to reduce the difficulty of parameter design. The influence of controller parameters on the pre-synchronization speed and frequency difference is analyzed. On this basis, an adaptive pre-synchronization control strategy is proposed to balance the pre-synchronization speed and frequency difference. The effectiveness of the proposed pre-synchronization control strategy is verified by MATLAB/Simulink simulation. The simulative results show that the proposed strategy can significantly improve the pre-synchronization speed under the premise that the frequency in the pre-synchronization process does not exceed the limit. |
| Key words: grid-forming control pre-synchronization electric converters frequency difference synchronous speed adaptive PI |
