Transient Control Strategy for Grid-forming Inverters With Both Power Angle Stabilization and Fault Current Limitation

LI Juan; SUI Zhenglong; MAN Jiawei; YANG Heling; CHEN Junrui; SUN Cong; REN Mingyao

doi:10.13335/j.1000-3673.pst.2024.2071

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Transient Control Strategy for Grid-forming Inverters With Both Power Angle Stabilization and Fault Current Limitation

更新时间：2026-03-13

- Transient Control Strategy for Grid-forming Inverters With Both Power Angle Stabilization and Fault Current Limitation
- Vol. 49, Issue 10, Pages: 4125-4134(2025)
- 作者机构：
  
  东北电力大学电气工程学院,吉林市,吉林省,132012
- 作者简介：
- 基金信息：
- DOI：10.13335/j.1000-3673.pst.2024.2071
  CLC： TM464;TP273
- Published：2025
- 稿件说明：
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LI Juan, SUI Zhenglong, MAN Jiawei, et al. Transient Control Strategy for Grid-forming Inverters With Both Power Angle Stabilization and Fault Current Limitation[J]. 2025, 49(10): 4125-4134.
DOI：

LI Juan, SUI Zhenglong, MAN Jiawei, et al. Transient Control Strategy for Grid-forming Inverters With Both Power Angle Stabilization and Fault Current Limitation[J]. 2025, 49(10): 4125-4134. DOI： 10.13335/j.1000-3673.pst.2024.2071.

摘要

针对电网发生三相对称短路故障期间，构网逆变器无功电压支撑能力不足、并网系统功角稳定性较差以及电力电子器件电流承载能力有限的问题，文章提出了一种兼顾功角稳定和故障限流的构网型逆变器暂态控制策略。首先，在传统二阶构网型逆变器控制策略的基础上，引入了一阶暂态电压方程，构建了三阶构网型(主动支撑型)逆变器暂态控制策略，分析了主动支撑型逆变器暂态电压支撑能力；其次，在有功控制环节中通过补偿暂态期间不平衡功率提升了系统的功角稳定性，在无功控制环节中通过调整电压指令值来限制故障电流；最后，设计了暂态控制触发系数Kon，解决了暂态功角和短路电流控制之间的协调问题。通过搭建仿真模型验证了所提暂态控制策略在应对电网三相对称短路故障的有效性。

Abstract

Aiming at the problems of insufficient reactive voltage support capability of the grid-forming inverter

poor power angle stability of the grid-forming system

and limited current carrying capability of power electronic devices during three-phase symmetrical short-circuit faults in the grid

this paper proposes a grid-forming inverter transient control strategy considering of the power angle stabilization and current limitation of faults. Firstly

based on the traditional second-order grid-forming inverter control strategy

the first-order transient voltage equation is introduced

the third-order grid-forming (active-support type) inverter transient control strategy is constructed

and the transient voltage support capability of the active-support type inverter is analyzed; secondly

the power-angle stability of the system is improved by compensating the imbalance power during the transient period in the active control link

and the fault current is limited by adjusting the voltage command value to limit the fault current; finally

the transient control trigger coefficient Kon is designed to solve the coordination problem between transient power angle and short-circuit current control. The effectiveness of the proposed transient control strategy in dealing with three symmetrical short-circuit faults in the power grid is verified by constructing a simulation model.

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