全球能源互联网2025，Vol.8Issue(6)：721-733,13.DOI:10.19705/j.cnki.issn2096-5125.20250153
提升弱电网静态电压稳定的构网型变流器容量配置与控制模式研究
Enhancing Static Voltage Stability in Weak Grid:Capacity Configuration and Control Mode of Grid-forming Converter
摘要
Abstract
In recent years,the escalating penetration of renewable energy sources(RES)in power systems has intensified the prevalence of weak grid characteristics,introducing critical challenges to operational stability.A prominent issue lies in the wide-range voltage oscillations induced by RES output fluctuations under weak grid conditions.This paper presents a methodology to enhance static voltage stability in weak grids through the strategic deployment of grid-forming converters(GFMs),leveraging power-voltage(PV)curve-based power flow analysis.Initially,the nonlinear switching logic of RES converters during fault ride-through(FRT)operations is investigated to unravel the power-voltage coupling dynamics in weak grid integration scenarios,thereby elucidating the inherent static voltage instability mechanisms of grid-following converters(GFLs).Subsequently,the determinants of static voltage stability are qualitatively analyzed from dual perspectives—grid strength reinforcement and dynamic reactive power support—leading to the establishment of configuration principles and control paradigms for GFMs in weak grid environments.A hardware-in-the-loop(HIL)simulation platform,incorporating authentic GFM control and protection systems,is developed to experimentally validate the static voltage stability enhancement.Empirical results demonstrate that GFM integration effectively elevates the short-circuit ratio(SCR)and voltage support capacity of weak grids,significantly improving static voltage stability and mitigating grid-wide voltage oscillations—a pivotal solution for RES-dominant weak grid architectures.关键词
静态电压稳定/PV曲线/短路比/构网型变流器/电压支撑Key words
static voltage stability/PV curve/short-circuit ratio/grid-forming converter/voltage support分类
信息技术与安全科学引用本文复制引用
孟祥帅,王耀函,林忠伟,吴林林,那子尚,梁恺,马向坤..提升弱电网静态电压稳定的构网型变流器容量配置与控制模式研究[J].全球能源互联网,2025,8(6):721-733,13.基金项目
国网冀北电力有限公司科技项目(52018K23000U).Technology Project of State Grid Jibei Electric Power Co.,Ltd.(52018K23000U). （52018K23000U）
