中国电机工程学报2024，Vol.44Issue(10)：3753-3765,中插1,14.DOI:10.13334/j.0258-8013.pcsee.222930
构网型VSC暂态稳定机理及改进限幅策略
Transient Stability Mechanism Analysis of the Grid Forming Voltage Source Converter and the Improved Limiting Method
摘要
Abstract
For the transient stability of the grid-forming voltage source converter(GFM-VSC)system under large disturbances,most existing studies fail to fully consider the fast transient response and control plasticity of power electronic sources.Therefore,this paper takes the GFM-VSC as the object,reveals the difference in transient response mechanism between the GFM-VSC and the SM from an energetic standpoint.With the help of the principle of equal area and phase diagrams methods,the transient stability mechanism of the control-molded GFM-VSC is analyzed.Then,considering the limiter that is easy to trigger under large disturbances,the instability mechanism caused by the failure of the system to exit the current limiting mode is illustrated in detail,and an improved limiting strategy with current distribution coefficient is proposed,which effectively enhances the transient stability of the system.Finally,the correctness of the theoretical analysis and the improved method are verified by simulation.关键词
构网型技术/电压源型变流器/暂态稳定性/电流限幅环节/控制策略Key words
grid forming(GFM)technology/voltage source converter(VSC)/transient stability/current limitation/control scheme分类
信息技术与安全科学引用本文复制引用
杜毅,郑超,孙华东..构网型VSC暂态稳定机理及改进限幅策略[J].中国电机工程学报,2024,44(10):3753-3765,中插1,14.基金项目
中国电力科学研究院有限公司自有资金项目"提升电网安全稳定性和运行效率的新型电力电子设备样机研制"(XT83-22-005).Project Supported by the China Electric Power Research Institute(CEPRI)"Development of a Prototype for New Power Electronic Devices to Enhance Grid Safety,Stability and Operational Efficiency"(XT83-22-005). （XT83-22-005）
