电力系统保护与控制2025，Vol.53Issue(3)：120-129,10.DOI:10.19783/j.cnki.pspc.240575
考虑限流的基于多李雅普诺夫法的虚拟同步机暂态稳定判据
Transient stability criterion of a virtual synchronous generator with current limiting using the multiple Lyapunov functions method
摘要
Abstract
In addressing the transient synchronization issue of grid-connected virtual synchronous generator considering current limiting strategies,traditional methods often rely on algebraic variable switching rules based on current amplitude.These methods make it difficult to analytically analyze the instability mechanisms,and the proposed criteria are also quite conservative.To tackle these issues,this paper introduces a switching model based on state variables using current limiting inequalities as a starting point.A transient stability criterion based on the multiple Lyapunov method is then proposed.This states that the system can remain stable if the Lyapunov functions of each subsystem exhibit a decreasing trend over two consecutive switching intervals.Finally,a method for setting the current limiting parameters is presented to maximize the system's stability boundary.Simulation results demonstrate that the proposed criteria are less conservative than the equal-area method,and the effectiveness of the conclusions drawn in this paper is verified.关键词
虚拟同步机/电流限幅/相角切换模型/多李雅普诺夫函数/饱和电流角Key words
virtual synchronous generator/current limiting/angle-switched model/multiple Lyapunov function/saturated current angle引用本文复制引用
朱誉,屠增泽,余达,刘菁锐,李佳朋,李宇骏..考虑限流的基于多李雅普诺夫法的虚拟同步机暂态稳定判据[J].电力系统保护与控制,2025,53(3):120-129,10.基金项目
This work is supported by the Science and Technology Project of China Southern Power Grid(No.036000KK 52220018(GDKJXM20220249)). 南方电网公司科技项目资助(036000KK52220018(GDKJXM20220249)) （No.036000KK 52220018(GDKJXM20220249）
国家自然科学基金项目资助(52277122) （52277122）
