Adaptive Mitigation Control for Wideband Oscillations of Offshore Wind Farms With MMC-HVDC System  

作　　者：Yiming Rao Jing Lyu Yifan Wang Xu Cai 

机构地区：[1]The Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education,Shanghai Jiao Tong University,Shanghai,200240,China [2]Science and Technology Research Institute,China Three Gorges Corporation,Beijing,101199,China

出　　处：《CSEE Journal of Power and Energy Systems》2025年第1期208-216,共9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(51907125);in part by the China Three Gorges Corporation(202103026)。

摘　　要：With offshore becoming the main battlefield of wind power generation,modular multilevel converter-based high-voltage DC(MMC-HVDC)transmission technology has become an ideal solution for offshore wind power integration and received rapid development.However,wideband oscillation events have seriously threatened stable operation of power systems.By far,existing oscillation mitigation methods are usually designed for specific oscillation cases and are not capable of mitigating wideband oscillations.In order to mitigate various oscillations adaptively,this article proposes an adaptive wideband oscillation mitigation control for MMC-HVDC system connected to offshore wind farms.Analytical wideband impedance models of the wind farm side MMC(WFMMC)and offshore wind farm composed of permanent-magnetic synchronous generator-based wind turbine generators(PMSG-WTGs)are derived,respectively,which are verified by measured impedances from time-domain simulations.Then,a wideband oscillation mechanism is revealed by impedance-frequency characteristics.On this basis,an adaptive wide band oscillation mitigation control is proposed,and its working principle as well as implementation process are elaborated.Case studies of a sub-/super-synchronous oscillation(SSO)event and a high-frequency oscillation(HFO)event of an offshore wind farm with MMC-HVDC system are carried out to verify effectiveness of the proposed adaptive wideband oscillation mitigation control.

关 键 词：Adaptive mitigation control MMC-HVDC offshore wind farm wideband oscillation 

分 类 号：TM614[电气工程—电力系统及自动化]