现代电力2025，Vol.42Issue(5)：901-910,中插5,11.DOI:10.19725/j.cnki.1007-2322.2023.0296
基于二维留数的风光混合电场经串补并网系统的次同步振荡分析
Analysis of Sub-synchronous Oscillation Based on Two-dimensional Residues in a Hybrid Wind-PV Farm via Series Compensation Grid Connection System
摘要
Abstract
With the proposal of the"carbon peaking and carbon neutrality"goal,wind and photovoltaic power generation technologies have found a wide application.However,the coupling effect between the power electronics of wind and photovoltaic farms,as well as the dynamic interaction between the renewable energy station and the series compensation,poses a risk of sub-synchronous oscillation to the system and affects the consumption capacity of renewable energy.Therefore,it is of great importance to study the stability of the hybrid wind-PV farm via series compensation grid connection system.Firstly,the state-space method is used to establish the mathematical model of doubly fed induction generator and PV unit,and the impedance transfer functions of the two are derived.Secondly,based on the complex torque coefficient method,the electrical damping characteristics expressed by the one-dimensional residues are generalized to the impedance characteristics expressed by the two-dimensional residues.The determination of the main oscillation mode is achieved by the weight of residues,thereby realizing simplification of the high-order transfer function and facilitating the analysis of the impedance characteristics of specific frequency bands.Also,the effectiveness of the simplified method is verified by the Bode diagram.Finally,by solving the eigenvalue participation factor and the residue observability and controllability correlation factors,the strongly correlated state variables and dominant parameters which affect the sub-synchronous oscillation are obtained based on the simplified transfer function.The influence of these dominant parameters on the sub-synchronous oscillation stability of system is studied through PSCAD simulation,which provides a theoretical basis for the formulation of sub-synchronous oscillation suppression measures.关键词
风光混合并网/留数法/传递函数简化/阻抗特性/次同步振荡Key words
hybrid wind-PV farm/residue method/transfer function simplification/impedance characteristics/sub-synchronous oscillations分类
信息技术与安全科学引用本文复制引用
朱晓雯,肖仕武,王利超..基于二维留数的风光混合电场经串补并网系统的次同步振荡分析[J].现代电力,2025,42(5):901-910,中插5,11.基金项目
国家自然科学基金项目(2021BJ0226).Project Supported by National Natural Science Foundation of China(2021BJ0226). （2021BJ0226）
