Abstract
本文针对分布式光伏大量接入对配电网电能质量与故障电流的影响展开研究。首先，采用恒功率光伏出力模型，从理论上分析了分布式光伏的接入对配电网电压偏差与电压谐波的影响；其次，分析了分布式光伏接入位置的上游、下游以及相邻馈线分别发生故障时，故障电流的变化情况；最后，基于以上理论分析对实际算例进行计算，并得出综合考虑电能质量与电流保护整定值的条件下，分布式光伏的准入容量。 In this paper, the impact of distributed photovoltaic (PV) access on the power quality and fault current of distribution network is studied. First of all, the constant power output of photovoltaic power model is adopted and the influence of the access of distributed photovoltaic on distribution network voltage deviation and voltage harmonic are analyzed; Secondly, the change of fault current is analyzed considering fault at the upstream, downstream and adjacent feeder of the distributed PV access location, respectively; Finally, practical example is calculated based on above theoretical analysis, and the maximum penetration of PV is calculated in comprehensive consideration of power quality and existing protection setting value.
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