电力系统保护与控制2025，Vol.53Issue(12)：139-151,13.DOI:10.19783/j.cnki.pspc.241137
新能源基地经LCC-HVDC送出系统动态交互机制及暂态过电压风险评估
Dynamic interaction mechanism and transient overvoltage risk assessment of renewable energy base connected via LCC-HVDC transmission system
摘要
Abstract
Aiming at the transient overvoltage at the sending end system caused by commutation failure in LCC-HVDC transmission systems for renewable energy integration,a risk assessment method for transient overvoltage at the sending end is proposed.First,the dynamic interaction mechanism between the renewable energy and DC transmission system under commutation failure is analyzed,and the transient voltage amplitude variation characteristics at the sending end under such interaction are studied.Then,a transient overvoltage assessment method considering the coupling effect of DC line dynamics and multi-control links is proposed.Furthermore,a critical short circuit ratio is introduced to quantify the transient overvoltage safety margin at the sending end,enabling the risk assessment of the transient overvoltage and analyzing the influence of the coupling effect of the AC-DC system on the transient overvoltage assessment.Finally,using a PSCAD simulation model of a renewable energy transmission system using LCC-HVDC,the accuracy and effectiveness of the transient overvoltage risk assessment method are verified.关键词
LCC-HVDC/换相失败/动态交互机制/暂态过电压/电网强度Key words
LCC-HVDC/commutation failure/dynamic interaction mechanism/transient overvoltage/grid strength引用本文复制引用
黄劼睿,刘昕宇,高熠莹,胡殿刚,马喜平,辛焕海..新能源基地经LCC-HVDC送出系统动态交互机制及暂态过电压风险评估[J].电力系统保护与控制,2025,53(12):139-151,13.基金项目
This work is supported by the Science and Technology Project of the Headquarters of State Grid Corporation of China(No.5100-202355810A-3-8-KJ). 国家电网公司总部科技项目资助(5100-202355810A-3-8-KJ) （No.5100-202355810A-3-8-KJ）
