直流同时换相失败对受端暂态稳定影响因素及其协同恢复控制策略  

Impact Factors of DC Concurrent Commutation Failure on Receiving-end Power System Transient Stability and Its Collaborative Recovery Control Strategy

作　　者：胡加伟 汪旸 赖宏毅 王彤 黄牧涛 王增平 HU Jiawei;WANG Yang;LAI Hongyi;WANG Tong;HUANG Mutao;WANG Zengping(Central China Branch of State Grid Corporation of China,Wuhan 430077,Hubei Province,China;State Key Laboratory for Alternate Electrical Power System With Renewable Energy Sources(North China Electric Power University),Changping District,Beijing 102206,China;School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China)

机构地区：[1]国家电网有限公司华中分部,湖北省武汉市430077 [2]新能源电力系统全国重点实验室(华北电力大学),北京市昌平区102206 [3]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《电网技术》2024年第11期4578-4588,I0044,共12页Power System Technology

基　　金：国家自然科学基金联合基金项目(U22B6006)。

摘　　要：多馈入直流受端系统中多直流同时发生换相失败无法避免,严重威胁系统的安全稳定运行。文章针对多馈入直流受端系统,从理论上研究了直流换相失败后恢复过程对受端系统暂态稳定性影响因素,并进一步提出了多直流协同恢复控制策略,以改善受端系统暂态稳定性。首先,建立了多馈入直流受端系统模型和直流潮流分析模型;其次,理论推导出了直流恢复过程中受端相对功角差关于直流功率的解析表达式,得到了直流恢复过程对受端系统暂态功角影响因素;然后,基于逆变侧直流控制器调节特性,得到了直流恢复过程对受端系统电压稳定影响因素,并基于上述影响因素提出了协同多直流恢复的控制策略。最后,在改进的Kundur's两区系统和IEEE-68节点机电-电磁混合仿真系统中进行测试,通过仿真验证了所提影响因素和协同恢复策略的正确性和有效性。The concurrent commutation failure of line commutated converter high voltage direct current(LCC-HVDC)cannot be avoided,which seriously threatens the safe and stable operation of the power system.Aiming at the receiving-end power system with multi-infeed LCC-HVDC,the impact factors of the recovery process after commutation failure on the transient stability of the receiving-end power system in this paper are theoretically revealed,and a multi-DC collaborative recovery control strategy is further proposed to improve its transient stability.The receiving-end power system model with multi-infeed LCC-HVDC and the DC power flow analysis model is established.Secondly,the analytical expression of the relative rotor angle difference of the receiving-end power system to the DC power during the recovery process is derived theoretically,and the impact factors of the DC recovery process on the rotor angle stability of the receiving-end system are obtained.Next,based on the regulation characteristics of the inverter-side DC controllers,the impact factors of the DC recovery process on the voltage stability of the receiving-end system are obtained,and a collaborative multi-DC recovery control strategy is further proposed based on the above impact factors.Finally,the improved Kundur’s two-area system and IEEE-68 bus electromechanical-electromagnetic hybrid simulation system are built,and the correctness and effectiveness of the proposed impact factors and collaborative recovery strategy are verified by simulation results.

关 键 词：多馈入直流受端系统 同时发生换相失败 暂态稳定影响因素 协同恢复控制策略 

分 类 号：TM721[电气工程—电力系统及自动化]