Distributed photovoltaic develops rapidly because of its clean and efficient characteristics,but the distributed photo-voltaic may increase the complexity of distribution network grounding fault characteristics.In view of the difficult problem of distribution network grounding fault line selection after distributed photovoltaic access,based on the analysis of the influence of distributed photovoltaic access on distribution network grounding fault characteristics,a multi-component fusion grounding fault line selection method based on S transform transient characteristic quantity,current increment fifth harmonic component steady-state characteristic quantity and inverter injection signal is proposed.A grounding fault simulation model of distribution network with distributed photovoltaic access is established,and through the comparison and analysis of line selection of distrib-uted photovoltaic with different grid-connected capacity,three-phase asymmetry and fault transition resistance,the effective-ness and superiority of the proposed method are verified.
关键词
配电网/接地故障选线/分布式光伏/S变换
Key words
distribution network/grounding fault line selection/distributed photovoltaic/Stransform
维普
万方数据