中国电机工程学报2023，Vol.43Issue(23)：8999-9009,11.DOI:10.13334/j.0258-8013.pcsee.221539
多馈入直流输电系统换相失败风险区域识别(二):换相失败风险量化评估及风险区域快速识别
Risk Area Identification of Commutation Failure in Multi-infeed HVDC System(Part Ⅱ):Quantitative Assessment of Commutation Failure Risk and Rapid Identification of Risk Area
摘要
Abstract
In order to solve the problems of quantitative assessment of commutation failure risk degree and rapid identification of risk areas in multi-infeed HVDC systems,the key factors affecting commutation failure of multi-infeed HVDC systems are studied in this paper.Then,based on the improved calculation method of critical voltage of commutation failure in part(Ⅰ)and the idea of normalization,a quantitative evaluation index of commutation failure risk degree is proposed,which can be used to judge whether a commutation failure occurs in different DC subsystems by its positivity and negativity.Its amplitude can reflect the voltage drop from the current state to the commutation failure(negative amplitude)or the voltage rise required from the current state to the absence of commutation failure(positive amplitude).Finally,based on the quantitative evaluation index,a fast identification method of commutation failure risk area under different fault severity is proposed.Based on PSCAD/EMTDC,the dual-infeed and three-infeed HVDC system models are built to verify the effectiveness of the commutation failure risk degree assessment results and the rapid identification of commutation failure risk areas.The results show that the proposed index can be used to quantitatively evaluate the commutation failure risk degree of multi-infeed HVDC systems,and can accurately identify the commutation failure risk area of multi-infeed HVDC systems under different fault severity.关键词
多馈入直流输电/换相失败风险/风险程度量化评估:风险区域识别Key words
multi-infeed HVDC transmission system/commutation failure risk/quantitative evaluation of commutation failure risk degree/identification of commutation failure risk area分类
信息技术与安全科学引用本文复制引用
叶全,郭春义..多馈入直流输电系统换相失败风险区域识别(二):换相失败风险量化评估及风险区域快速识别[J].中国电机工程学报,2023,43(23):8999-9009,11.基金项目
国家重点研发计划项目(2021YFB2400900).National Key R&D Program of China(2021YFB2400900). （2021YFB2400900）
