电力系统保护与控制2024，Vol.52Issue(9)：36-45,10.DOI:10.19783/j.cnki.pspc.231361
海上风电场经柔直送出系统的虚拟导纳中频振荡抑制策略
Virtual admittance control strategy for medium-frequency oscillation in an offshore wind farm when connected to a VSC-HVDC
摘要
Abstract
With the widespread application of flexible DC transmission technology(VSC-HVDC)in offshore wind power engineering,medium-frequency oscillation(MFO)may occur when offshore converter stations are connected to offshore wind farms,seriously endangering the safe and stable operation of the system.Therefore,a virtual admittance-based MFO suppression strategy is proposed.First,a modular state space method is used to establish a small signal model of offshore wind farm when connected to a VSC-HVDC.Then,the participation factor analysis method is used to reveal the key factors affecting the MFO,and the impact characteristics of each key factor on the MFO are analyzed.Based on this,a damping control strategy is proposed to add virtual admittance to the VSC-HVDC control system.The stable range of the controller parameters is divided based on the differential influence of the damping controller on MFO and LCL oscillations.Finally,a time-domain simulation model is built in Matlab/Simulink.The simulation results show that the proposed strategy can effectively suppress MFO and improve system stability in different system operating conditions.关键词
海上风电场/柔性直流/中频振荡/模块化状态空间法/虚拟导纳Key words
offshore wind farms/VSC-HVDC/MFO/modular state space method/virtual admittance引用本文复制引用
聂永辉,张瑞东,周勤勇,高磊..海上风电场经柔直送出系统的虚拟导纳中频振荡抑制策略[J].电力系统保护与控制,2024,52(9):36-45,10.基金项目
This work is supported by the Science and Technology Project of State Grid Corporation of China(No.5100-202355407A-3-2-ZN). 国家电网公司科技项目资助(5100-202355407A-3-2-ZN) （No.5100-202355407A-3-2-ZN）
