中国电机工程学报2016，Vol.36Issue(7)：1781-1789,9.DOI:10.13334/j.0258-8013.pcsee.2016.07.003
影响多馈入直流系统换相失败的电网薄弱区域快速识别方法
A Rapid Identification Method of Weak Areas in Power Grid Based on Commutation Failure Analysis in Multi-infeed HVDC Systems
肖浩 1李银红 1于芮技 1段献忠1
作者信息
- 1. 强电磁工程与新技术国家重点实验室 华中科技大学，湖北省武汉市 430074
- 折叠
摘要
Abstract
To identify weak areas accurately and fast, within which ac system faults will adversely induce concurrent commutation failure among inverters, is of great significance to the safe and stable operation of power grid. Considering that the related study is mainly performed with simulation tools and its application can not cover the entire ac systems, a rapid identification method of weak areas in power grid based on commutation failure analysis in multi-infeed HVDC systems was put forward. With the ac line fault location regarded as a generalized node, the voltage correlation factor (VCF) was defined based on a generalized node impedance matrix. Based on the minimum extinction angle criteria, the analytical expression of critical voltage correlation factor (CVCF) was derived, through which the immunity of inverters to commutation failure in HVDC systems could be effectively characterized.Meanwhile,the correlation between VCF and the variability of ac line fault locations was expressed and the method to determine commutation failure correlation region (CFCR) was proposed, through which the weak areas can be shown visually in the grid topology map.The validity of proposed index and the applicability of aforementioned method are verified by the calculation results based on the multi-infeed HVDC system model of China Southern Grid.关键词
多馈入直流输电系统/换相失败/电压关联因子/换相失败关联域/薄弱区域识别Key words
multi-infeed HVDC transmission system/commutation failure/voltage correlation factor (VCF)/commutation failure correlation region (CFCR)/weak area identification分类
信息技术与安全科学引用本文复制引用
肖浩,李银红,于芮技,段献忠..影响多馈入直流系统换相失败的电网薄弱区域快速识别方法[J].中国电机工程学报,2016,36(7):1781-1789,9.
