浙江电力2024，Vol.43Issue(8)：47-56,10.DOI:10.19585/j.zjdl.202408006
基于虚拟电阻的混合直流输电系统振荡抑制策略
An oscillation suppression strategy for hybrid DC systems based on virtual resistance
摘要
Abstract
Hybrid DC transmission systems are prone to DC current oscillations as the parameters of constant DC current controller increase,an oscillation suppression strategy based on virtual resistance is proposed.This strategy generates an additional voltage that is in phase opposition to the disturbance component by leveraging the current os-cillation component and an introduced virtual resistance,thereby achieving suppression of the DC current oscilla-tions.Initially,a small-signal model of the hybrid DC transmission system is established to analyze the impact of pa-rameters of the constant DC current controller on the stability of small signals.Subsequently,an oscillation suppres-sion strategy based on virtual resistance is put forward to study the influence of virtual resistance on the stability of small signals in the system.The effectiveness of the proposed strategy is verified through PSCAD/EMTDC simula-tions.Lastly,the stability range of the virtual resistance under different constant current controller parameters is analyzed.The research findings indicate that the proposed control strategy can effectively eradicate DC current oscil-lations and improve system stability.关键词
混合直流输电系统/直流电流振荡/虚拟电阻/小信号模型Key words
hybrid DC transmission system/DC current oscillation/virtual resistance/small-signal model引用本文复制引用
殷子寒,李钢,张宝顺,邹强,陈金玉,晁武杰,邓超平..基于虚拟电阻的混合直流输电系统振荡抑制策略[J].浙江电力,2024,43(8):47-56,10.基金项目
国家电网公司总部科技项目(5500-202221124A-1-1-ZN) （5500-202221124A-1-1-ZN）
