Conjugate Vectors Method Applied to Asymmetrical Fault Analysis of Power Electronized Power Systems  

作　　者：Yingbiao Li Xing Liu Jiabing Hu Jianhang Zhu Jianbo Guo 

机构地区：[1]State Key Laboratory of Advanced Electromagnetic Technology(Huazhong University of Science and Technology),Wuhan 430074,China [2]China Electric Power Research Institute,Beijing 100192,China

出　　处：《CSEE Journal of Power and Energy Systems》2024年第4期1536-1549,共14页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported in part by the National Natural Science Foundation of China(52107096);in part by the Young Elite Scientists Sponsorship Program by CAST(2021QNRC001);in part by the National Science Foundation for Distinguished Young Scholars of China(52225704).

摘　　要：With the wide application of power electronized resources(PERs),the amplitude and frequency of voltages show significant time-varying characteristics under asymmetrical faults.As a result,the traditional phasor model,impedance model,and symmetrical components method based on the constant amplitude and frequency of voltages are facing great challenges.Hence,a novel asymmetrical fault analysis method based on conjugate vectors is proposed in this paper which can meet the modeling and analysis requirements of the network excited by voltages with time-varying amplitude/frequency.Furthermore,asymmetrical fault characteristics are extracted.As an application,a faulted phase identification(FPI)strategy is proposed based on the fault characteristics.The correctness and superiority of the asymmetrical fault analysis method and FPI strategy are verified in time-domain simulations and a real-time digital simulator.

关 键 词：Asymmetrical fault characteristics conjugate vectors method dynamic asymmetrical fault analysis time-varying amplitude/frequency 

分 类 号：TM711[电气工程—电力系统及自动化]