论文信息 - A Practical Setting Method for Over-Current Relay and Automatic Recloser in Distribution Network with Photovoltaic Station

A Practical Setting Method for Over-Current Relay and Automatic Recloser in Distribution Network with Photovoltaic Station

Over-current protection in distribution network is easy to be influenced by the additional injected power at the measuring point. In this paper a practical setting method for the over-current relay considering the injected power is proposed. The proposed strategy is based on the bus maximum injected power, and the basic principle of the method is to prevent the over-current protection from maloperation when there has injection current or branching current. In addition, coordination between Grid Automatic Reclosing Time (GART) and photovoltaic (PV) Low Voltage Ride Through (LVRT) is also studied in this paper. By using exact experimental analysis, the grid maximum automatic reclosing time under common faults is given. Simulation results show that reclosing within the maximum reclosing time can guarantee the successful operation of LVRT for the PV, which would be a guiding value for the safe operation of large-scale Grid-Connected Photovoltaic (GCPV).

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