电力系统自动化2024，Vol.48Issue(13)：130-137,8.DOI:10.7500/AEPS20230717007
计及阻尼和角速度的锁相环暂态同步稳定性分析与提升方法
Analysis and Enhancement Method for Transient Synchronization Stability of Phase-locked Loop Considering Damping and Angular Velocity
摘要
Abstract
The increasing penetration of power electronic devices in power grids has led to a decrease in grid strength and inertia,and the transient synchronization stability problem under grid faults is becoming more and more prominent.To address the transient loss problem of grid-connected inverters during weak grid faults,a transient synchronization model for grid-connected inverters is developed considering the phase-locked loop damping and the initial angular velocity at the moment of fault occurrence.The influence law of variations in phase-locked loop damping and initial angular velocity on transient synchronization stability is analyzed.Furthermore,an additional damping control method of phase-locked loop based on the feedback correction of frequency deviation is proposed to enhance the transient synchronization stability of grid-connected inverters.To address the transient loss problem posed by serious grid faults without stable equilibrium points,a dynamic compensation method for output angular velocity of phase-locked loop is proposed to achieve the stable operation of the system after fault recovery.Finally,a hardware-in-the-loop experimental platform is constructed to verify the theoretical analysis and control methods.关键词
暂态同步稳定性/故障恢复/锁相环/并网逆变器/阻尼Key words
transient synchronization stability/fault recovery/phase-locked loop/grid-connected inverter/damping引用本文复制引用
占领,胡彬,王垚鑫,年珩..计及阻尼和角速度的锁相环暂态同步稳定性分析与提升方法[J].电力系统自动化,2024,48(13):130-137,8.基金项目
国家自然科学基金资助项目(52325702). This work is supported by National Natural Science Foundation of China(No.52325702). （52325702）
