南方电网技术2026，Vol.20Issue(2)：1-10,22,11.DOI:10.13648/j.cnki.issn1674-0629.2026.02.001
计及电流限制的水光互补发电经柔性直流送出系统暂态同步稳定性分析
Transient Synchronous Stability Analysis of Hydropower and Photovoltaic Integration System via VSC-HVDC Considering Current Limiting
摘要
Abstract
A study is conducted on the transient synchronization stability of a hydropower and photovoltaic power generation system transmitted via voltage source converter high voltage direct current(VSC-HVDC)considering current limitations.Firstly,accounting for the current-limiting control strategies of photovoltaic inverters and flexible rectifiers during faults,a mathematical expression for the active power output of hydro-generating units before fault clearance is derived based on Thévenin's theorem.Secondly,leverag-ing the equal area criterion,an analytical formula for the critical clearing angle of the transmission system is deduced.This critical clearing angle served as a key indicator for evaluating the transient synchronization stability limit of the system.The influence of parameters such as the saturation current angle of photovoltaic and flexible converter stations,as well as the hydro-photovoltaic power ratio,on the transient stability of the transmission system is systematically assessed.Subsequently,an optimal control parameter tun-ing scheme is proposed to enhance the system's transient synchronization stability.Finally,time-domain simulations verify the ac-curacy of the analysis on factors affecting transient synchronization stability and the effectiveness of the proposed optimal control parameter tuning method.关键词
戴维南定理/水光互补发电系统/柔性直流输电/暂态同步稳定性/等面积定则Key words
Thevenin's theorem/hydropower and photovoltaic integration system/VSC-HVDC transmission/transient synchron-ous stability/equal area criteria分类
信息技术与安全科学引用本文复制引用
蔡东晓,赵仕兴,李桂源,张阳,黄伟煌,李佳朋,李宇骏..计及电流限制的水光互补发电经柔性直流送出系统暂态同步稳定性分析[J].南方电网技术,2026,20(2):1-10,22,11.基金项目
国家自然科学基金资助项目(U23B20112) （U23B20112）
南方电网科学研究院科技项目(SEPRI-K22B053). Supported by the National Natural Science Foundation of China(U23B20112) （SEPRI-K22B053）
the Science and Technology Project of Electric Power Research Institute,CSG(SEPRI-K22B053). （SEPRI-K22B053）
