Volume 4,Issue 9
构网型逆变器电应力分析及其主动限流控制
构网型逆变器在电网故障期间需提供电压和频率支撑。暂态电流冲击和直流母线过电压会对功率器件造成显著的电应力。现有依赖虚拟阻抗或模式切换的限流方法存在局限性。本文以虚拟同步发电机控制的构网型逆变器为研究对象，提出一种基于电流矢量幅值限制的主动限流控制策略。该策略通过调节电压外环输出的d 轴和q 轴电流参考值，在保持相位信息的同时直接减轻器件的电流应力。仿真结果表明，该策略可将故障电流峰值从约1.45标幺值降至约1.14标幺值，并将直流母线电压波动限制在5.1% 以内。该方案是一种简洁、无需额外硬件的工程优化方法，有助于改善电网支撑性能。
[1] 詹长江, 吴恒, 王雄飞, 等. 构网型变流器稳定性研究综述[J]. 中国电机工程学报,2023,43(6):2339-2359.
Zhan Changjiang, Wu heng, Wang Xiongfei, et al. An Overview of Stability Studies of Grid-forming Voltage Source Converters[J]. Proceedings of the CSEE, 2023,
43(6):2339-2359.
[2] 厉璇, 刘永慧, 赵月杭, 等. 基于电压源等效的构网型储能变流器幅值饱和限流模式暂态稳定性分析[J]. 高电压技术,2026,52(5):2172-2184.
Li Xuan, Liu Yonghui, Zhao Yuehang, et al. Voltage-source-model-based Transient Stability Analysis of Grid-forming Convertersin Current Saturation Limiting Mode[J],
High Voltage Engineering, 2026, 52(5): 2172-2184.
[3] 吴西奇, 王晗, 黄鹭鹭, 等. 构网型变流器内环构造方法及暂态特性分析[J/OL]. 中国电机工程学报,1-15[2026-08-14].
[4] 赵博元, 陈磊, 闵勇, 等. 跟网与下垂构网变流器混联带负荷系统稳定域与稳定形态[J]. 电力系统自动化,2026,50(6):16-34.
Zhao Boyuan, Chen Lei, Min Yong, et al. Stability Region and Stability State of Load -carrying Hybrid System with Grid-following Converter and Grid-forming Converter
with Droop Controller[J], Automation of Electric Power Systems, 2026, 50(6): 16-34.
[5]Z. Wang et al.. Transient Synchronization Stability of Grid‑Tied Multi‑VSCs System Considering Nonlinear Damping and Transient Interactions[J]. IEEE Transactions on
Power Electronics, 2024, 39(12):16775‑16791.
[6]A. H. Okilly, C. Kim and J. Baek. Experimental Implementation of a 3‑Level TNPC‑IGBT Inverter for Uniform Stress Distribution and THD Mitigation: MPC‑Driven
Switching Optimization, LCL Filter Integration, and Real‑Time Stress Monitoring[J]. IEEE Access, 2025, 13:152762‑152781.