电力系统自动化2026，Vol.50Issue(4)：163-172,10.DOI:10.7500/AEPS20250317005
考虑低电压穿越锁相稳定与暂态过电压的VSC参数安全域
Security Region of Voltage Source Converter Parameters Considering Phase-locked Stability During Low Voltage Ride-through and Transient Overvoltage
摘要
Abstract
Short-circuit faults of power grid cause voltage source converters(VSCs)to be in the low voltage ride-through(LVRT)state.During this process,the stability of the phase-locked loop(PLL)and the transient overvoltage after recovery are two critical problems of security and stability.The PLL parameters and the current reference values during the LVRT process are key influencing parameters.This paper proposes a method for calculating the parameter security region that comprehensively considers PLL stability during the LVRT process and transient overvoltage after recovery.Firstly,to address the issue of deviation between the initial point and the equilibrium point affecting the effectiveness of traditional small-disturbance stability criteria,a phase-locked stability analytical analysis method and a parameter security region considering initial point deviation are proposed.Secondly,transient overvoltage constraints are specified,and the parameter security region under transient overvoltage constraints is calculated based on the analytical expression of the terminal voltage throughout the entire process.Finally,the intersection is found to obtain the parameter security region that comprehensively considers PLL stability and transient overvoltage.The effectiveness of the derived parameter security region is validated by MATLAB/Simulink simulation results.关键词
电压源型变流器/低电压穿越/锁相环/稳定性/暂态过电压/参数安全域Key words
voltage source converter(VSC)/low voltage ride-through(LVRT)/phase-locked loop(PLL)/stability/transient overvoltage/parameter security region引用本文复制引用
骆舒婕,夏德明,陈磊,王克非,李忠憓,刘清晨..考虑低电压穿越锁相稳定与暂态过电压的VSC参数安全域[J].电力系统自动化,2026,50(4):163-172,10.基金项目
国家电网公司东北分部科技项目(52992624000W). This work is supported by Northeast Branch of State Grid Corporation of China(No.52992624000W). （52992624000W）
