电力系统自动化2026，Vol.50Issue(6)：87-99,13.DOI:10.7500/AEPS20250415005
考虑限流的构网型变流器及角频率PID补偿器暂态稳定性分析
Transient Stability Analysis of Grid-forming Converter and Angular Frequency PID Compensator Considering Current Limiting
摘要
Abstract
Transient instability may occur in grid-forming converters with limited overload capacity under large-disturbance faults.Firstly,the concept of transient stability enhancement in active power control loops is analyzed,and the influence of active power control loop parameters on transient power-angle and frequency stability is investigated.A relatively unified angular frequency proportional-integral-differential(PID)compensator is proposed.This method improves the power-angle dynamic process and constructs a power-angle equilibrium point by adjusting damping,power command,and inertia through proportional,integral,and derivative coefficients,thereby enhancing the transient stability performance of the converter.Secondly,considering the impact of current limiting amplitude on the converter,the inherent mechanism of deteriorating power-angle curve due to current limiting amplitude is revealed.Subsequently,for the transient stability analysis of compensator coefficients,the proportional and differential coefficients are applicable for fault ride-through when the power-angle balance point exists,while the integral coefficients are used to construct balance points for permanent fault ride-through.At the same time,a compensator parameter design process considering current limiting is proposed,highlighting the potential connection between current limiting and compensator parameters,and qualitatively describing it with transient stability indicators such as the size of the attraction domain and the length of the clearing time.Finally,the effectiveness of the angular frequency PID compensator in improving the transient stability performance of grid-forming converters is verified through simulation and experimental comparison of several schemes.关键词
构网型变流器/有功环/限流幅值/暂态稳定性/比例-积分-微分补偿器/功角曲线/故障穿越Key words
grid-forming converter/active power control loop/current limiting amplitude/transient stability/proportional-integral-differential(PID)compensator/power-angle curve/fault ride-through引用本文复制引用
颜湘武,胡演,蔡光,贾焦心,邵尹池..考虑限流的构网型变流器及角频率PID补偿器暂态稳定性分析[J].电力系统自动化,2026,50(6):87-99,13.基金项目
国家自然科学基金青年基金资助项目(52207102) （52207102）
智能电网国家科技重大专项资助项目(2025ZD0805201). This work is supported by National Natural Science Foundation of China(No.52207102)and Smart Grid-National Major Science and Technology Project of China(No.2025ZD0805201). （2025ZD0805201）
