国家电网河北省供电公司石家庄分公司,石家庄 050000
中国科学院电工研究所,北京 100190
王涛(1983—),女,硕士,高级工程师,研究方向为分布式配电网(E-mail:2764759491@qq.com)。
朱恩泽(1997—),男,博士研究生,研究方向为电力电子设备与电力电子设备在电力系统中的应用(通信作者)(E-mail:zhuenze@mail.iee.ac.cn)。
收稿:2025-09-21,
修回:2025-12-11,
纸质出版:2026-04-16
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王涛, 王聪, 朱恩泽, 等. 一种虚拟同步型构网储能变流器的故障电流抑制方法[J]. 高压电器, 2026,62(4):223-228.
WANG Tao, WANG Cong, ZHU Enze, et al. Fault Current Suppression Method for a Virtual Synchronous Type Grid-forming Energy Storage Converters[J]. High Voltage Apparatus, 2026, 62(4): 223-228.
王涛, 王聪, 朱恩泽, 等. 一种虚拟同步型构网储能变流器的故障电流抑制方法[J]. 高压电器, 2026,62(4):223-228. DOI: 10.13296/j.1001-1609.hva.2026.04.026.
WANG Tao, WANG Cong, ZHU Enze, et al. Fault Current Suppression Method for a Virtual Synchronous Type Grid-forming Energy Storage Converters[J]. High Voltage Apparatus, 2026, 62(4): 223-228. DOI: 10.13296/j.1001-1609.hva.2026.04.026.
构网型变流器的恒压输出特性使其在故障状态下会出现过电流,这限制了其应用推广。文中提出了一种虚拟同步型构网储能变流器的故障电流抑制方法,在实现惯性增强的前提下,能够限制故障电流。首先,基于虚拟同步发电机原理,给出了控制策略,并分析其惯性增强作用。然后,分析了故障状态下过电流的原因:功率指令无法及时调整以及电压跌落瞬态分量是产生过电流的两个主要因素,并设计了一种基于功率补偿与电压补偿的前馈控制策略,在单相以及三相故障下均可消除过电流的影响。最后,搭建了MATLAB/Simulink仿真模型,验证了故障电流抑制方法的有效性。
The constant voltage output characteristics of grid-forming inverters result in overcurrent under fault conditions
which limits their application and promotion. In this paper
a fault current suppression method for a virtual synchronous grid-forming energy storage converter is proposed which
on the premises of achieving inertial enhancement
can limit the fault current. First
a control strategy is proposed based on the principle of virtual synchronous generator and its inertia enhancement effect is analyzed. Then
the reasons for overcurrent under fault conditions were analyzed.The inability to adjust power commands in a timely manner and the transient component of voltage drop are two main factors causing overcurrent. Moreover
a feedforward control strategy based on power compensation and voltage compensation is designed
which can eliminate the impact of overcurrent under single-phase and three-phase faults. Finally
a MATLAB/Simulink simulation model is set up to verify the effectiveness of the fault current suppression method.
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