电力系统保护与控制2024，Vol.52Issue(10)：84-94,11.DOI:10.19783/j.cnki.pspc.231137
基于模块化思想的LCC-HVDC改进小信号建模及交互稳定性分析
Improved small signal modeling and interaction stability analysis of LCC-HVDC based on modularization
摘要
Abstract
With the widespread application of line commutated converter based high voltage direct current(LCC-HVDC)technology,the interactive stability problem of AC-DC hybrid power systems is becoming increasingly prominent.This paper first establishes the transfer function model of an LCC converter considering the nonlinear commutation overlapping dynamic process based on the state-space averaging method.To accommodate more complex DC transmission system modeling,it is proposed to establish small-signal models of LCC-HVDC subsystems using a modularization idea,and the interface matrix reflecting the electrical coupling characteristics between AC/DC system and converter is derived to realize subsystem connection,thereby modularly establishing accurate and easily expandable small-signal models of double-ended LCC-HVDC system.These consider the control time delay and phase fluctuation of phase-locked loop output.Finally,the influence of control system parameters and control time delay on the small disturbance stability of the system and the dominant factors of the instability modes are analyzed.The mechanism of AC-DC hybrid resonance of double-ended LCC-HVDC system and the interaction between sender and receiver are revealed.The research results can provide a theoretical basis for the design of system parameters and resonance suppression measures.关键词
LCC-HVDC/状态空间模型/模块化/控制链路延时/谐振影响因素Key words
LCC-HVDC/state space model/modularity/control time delay/resonance influence factor引用本文复制引用
王顺亮,刘海军,谢洋,马俊鹏,李永琪,焦宁,刘天琪..基于模块化思想的LCC-HVDC改进小信号建模及交互稳定性分析[J].电力系统保护与控制,2024,52(10):84-94,11.基金项目
This work is supported by the National Natural Science Foundation of China(No.51977135). 国家自然科学基金项目资助(51977135) （No.51977135）
