摘要
基于可控电网换相型换流器(controllable line commutated converter,CLCC)的高压直流输电技术避免了常规直流换相失败问题,为高压直流馈入电网提供了崭新途径。文章揭示CLCC高压直流输电系统的故障响应机理,对比CLCC与电网换相型换流器、电压源型换流器等直流输电技术的功率特性差异。针对CLCC可控换流的技术特点,提出一种基于最大触发角提升的CLCC优化控制方法,改善了CLCC的故障响应特性,提升了受端电网交流电压的恢复速度。最后,基于PSD-PSModel电力系统仿真软件,建立送受端电网机电暂态和CLCC直流电磁暂态的混合仿真模型,验证理论分析的准确性和优化控制的有效性。
The novel controllable line commutated converter(CLCC)can entirely eliminate commutation failure,which provides a new way for high-voltage direct current to connect to the power grid.This paper reveals the fault response mechanism of high-voltage direct current based on CLCC,and compares the power characteristics differences between CLCC,line commutated converter(LCC)and voltage source converter(VSC).Then,the CLCC optimization control method of increasing maximum triggering angle is proposed,which can improve the fault response characteristics of CLCC and increase the recovery speed of the power grid voltage.Finally,based on the PSD-PSModel simulation software,the hybrid simulation model for the electromechanical transient model of the power grid and the electromagnetic transient model of CLCC is established to verify the accuracy of theoretical analysis and the effectiveness of optimized control proposed in this paper.
作者
连攀杰
庞博涵
刘文焯
郑超
许克
汤涌
张静
LIAN Panjie;PANG Bohan;LIU Wenzhuo;ZHENG Chao;XU Ke;TANG Yong;ZHANG Jing(State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute),Haidian District,Beijing 100192,China;State Key Laboratory of Advanced Power Transmission Technology(China Electric Power Research Institute),Changping District,Beijing 102200,China)
出处
《中国电机工程学报》
北大核心
2025年第2期679-689,I0023,共12页
PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING
基金
中国电力科学研究院自筹基金项目(52420021004Q-A)。
