光伏电站接入对配电网电流保护的影响研究

Research on the impact of photovoltaic power station connection on distribution network current protection

光伏电站接入可能会对配电网电流保护产生影响。首先探讨了常规控制策略下光伏电站的短路计算模型,然后基于光伏电站接入典型配电网等效电路,从短路点位置、光伏电站容量和接入位置三个方面理论分析了对传统配电网电流保护的影响。最后以光伏电站接入35 k V典型配网为例,仿真验证了理论分析的正确性,研究结果对光伏电站的接入具有一定的指导意义。

Photovoltaic（PV） power station connection may affect the distribution network current protection. Firstly,the short circuit calculation model of PV power station under the conventional control strategy is discussed. And based on the equivalent circuit of typical distribution network with the connection of the PV power station,theoretical analysis is conducted from three aspects of the position of the short circuit,the capacity and connection position of PV power station. Finally,taking 35kV typical distribution network as an example,the correctness of the theoretical analysis is verified by simulation. The research results have certain guiding significance for the connection of PV power station.