电力系统自动化2024，Vol.48Issue(17)：56-65,10.DOI:10.7500/AEPS20230811007
基于非线性解耦方法的交直流配电系统暂态稳定性分析
Transient Stability Analysis of AC/DC Distribution System Based on Nonlinear Decoupling Method
摘要
Abstract
With the rapid development of flexible AC/DC distribution systems,the large-scale access of nonlinear elements such as power electronic devices and constant power loads make the transient stability problem of the system increasingly serious.Firstly,a mathematical model of AC/DC distribution system with constant power loads based on AC/DC and DC/DC converters connected in parallel under double-loop control is established,and a nonlinear Taylor expansion of the system is carried out.Secondly,the original high-order system is decoupled into a series of low-order subsystems based on the nonlinear decoupling theory.The dominant decoupled subsystem is identified and analyzed in terms of transient stability by using the phase-plane method and the inverse trajectory method,and the validity of the theoretical analysis is verified by physical simulation.Then,the concept of the nonlinear participation factor is introduced based on the principle of nonlinear decoupling,and the participation factor of the state variables is calculated,so as to put forward the analytical method of the control parameters affecting the stability under the constant power load perturbation,and further give the feasible domain of the control parameters.Finally,an AC/DC distribution system with double-loop control under constant power load is constructed by using PLECS software,and simulation and experiment verify the effectiveness of the proposed method.关键词
交直流配电系统/非线性解耦/暂态稳定性/时域仿真法/可行域Key words
AC/DC distribution system/nonlinear decoupling/transient stability/time-domain simulation method/feasible domain引用本文复制引用
姜妍,彭克,赵学深,姜淞瀚..基于非线性解耦方法的交直流配电系统暂态稳定性分析[J].电力系统自动化,2024,48(17):56-65,10.基金项目
山东省自然科学基金资助项目(ZR2023ME034). This work is supported by Shandong Provincial Natural Science Foundation of China(No.ZR2023ME034). （ZR2023ME034）
