Tie line fault ride?through method of photovoltaic station based on cooperative strategy of energy storage, relay protection and photovoltaic inverters

The fault of the tie line between photovoltaic (PV) station and grid is a serious for PV station. It will cause to operate into an unintentional island. uncontrolled Island voltage frequency inevitably lead disconnection inverter in This situation bring great losses operators impact power grid. In order deal with fault, this paper analyzes operation characteristics stations case firstly. Then ride-through method based on cooperative strategy small capacity energy storage (ES), relay protection inverters proposed. islanding switching control strategies ES are designed respectively. protection, controller formulated as well. real-time digital simulator (RTDS) closed-loop test platform including device, built verify effectiveness proposed method.