Modified Dynamic Model and Small-signal Stability Analysis for LCC- HVDC Systems  

作　　者：Chunyi Guo Jiaqing Zhang Shuo Yang Huan Li Chuang Fu 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China [2]Electric Power Research Institute,China Southern Power Grid State Key Laboratory of HVDC,Guangzhou,China

出　　处：《CSEE Journal of Power and Energy Systems》2025年第2期750-759,共10页中国电机工程学会电力与能源系统学报(英文)

基　　金：supported in part by the National Natural Science Foundation of China(No.51877077).

摘　　要：Inaccuracy of modeling for line commutated converter based high voltage direct current (LCC-HVDC) systems will degrade the reliability of small-signal stability analysis results. Taking a practical project as the study system, this paper establishes a modified dynamic model by modifying the current switching function, firing angle calculation and DC voltage calculation. Then, the accuracy of the modified model is verified by a detailed electromagnetic transient (EMT) simulation. Finally, with the modified dynamic model, the impact of the control parameters and AC system strength on the small-signal stability of the overall system is investigated by adopting the eigen-analysis. The results clearly demonstrate that the modified model shows higher accuracy than the original model.

关 键 词：LCC-HVDC modified dynamic model practical project small-signal analysis 

分 类 号：TM721.1[电气工程—电力系统及自动化]