高电压技术2026，Vol.52Issue(5)：2172-2184,中插2-中插3,15.DOI:10.13336/j.1003-6520.hve.20251565
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
Voltage-source-model-based Transient Stability Analysis of Grid-forming Converters in Current Saturation Limiting Mode
摘要
Abstract
Grid-forming voltage source converters(GFM-VSCs)offer reliable supports for the fault ride-through capa-bility of renewable energy generators.While current-limiting(CL)control degrades the system's transient stability during the fault.Traditional transient stability analysis for GFM-VSCs with amplitude-saturated current limiters predominantly relies on the current-source equivalent models.Such models not only fail to reveal changes in physical meaning induced by the mode switching during CL,but also struggle to analyze the influence mechanism of voltage control schemes and current limiters on transient stability.To address this issue,a transient stability analysis method for GFM-VSCs with cur-rent limiters is proposed based on the voltage-source equivalent model.From the perspective of equivalent system impedance,the influence mechanism of current limiters with different priorities on the power characteristics and system stability is systematically analyzed.The results show that,for GFM-VSCs with virtual admittance voltage control,the current limiters realize current suppression and phase shift by adjusting the magnitude and angle of the system impedance.Specifically,the impedance angle plays a dominant role in affecting the transient stability margin,by elevating or de-pressing the power characteristic during CL.Comparative analysis shows that the converter with the q-axis priority current limiters exhibits the largest impedance angle and stability margin,whereas the converter with the d-axis priority limiters has the smallest ones.Simulation results validate the accuracy of the proposed model and the correctness of the theoretical analysis.关键词
构网型储能变流器/幅值饱和限流/电压源等效/功角特性/系统阻抗/暂态稳定性Key words
GFM-VSCs/amplitude-saturated current limiter/voltage source model/power-angle characteristics/system impedance/transient stability引用本文复制引用
厉璇,刘永慧,赵月杭,王跃,武延林,李建伟..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,中插2-中插3,15.基金项目
国网蒙东电力科技项目(SGMDDK00DJJS2400153) （SGMDDK00DJJS2400153）
陕西省自然科学基础研究计划(2025JC-YBQN-685) （2025JC-YBQN-685）
国家重点研发计划(2023YFB2406700).Project supported by Science and Technology Project of SGIMEP(SGMDDK00DJJS2400153),Shaanxi Provincial Basic Research Program of Natural Science(2025JC-YBQN-685),National Key R&D Program of China(2023YFB2406700). （2023YFB2406700）
