基于Matlab的分布式光伏并网发电系统对配电网电能质量的影响

摘要

文章首先搭建了基于Matlab-Simulink的分布式光伏并网发电系统和具体的配电网的仿真模型，然后在此基础上，从电压偏差和节点电压和负荷电流的谐波含量角度，定量分析了分布式光伏并网发电系统的并网位置和并网容量对配电网电能质量的影响。仿真结果表明：并网位置越接近线路末端或者并网容量越大，光伏系统对配电网的电能质量影响越大，而且离并网位置越近的节点所受影响也越严重。%In this paper, a simulation model of a distributed photovoltaic grid-connected generation system and a de-tailed distribution network were built firstly based on Matlab-Simulink, then on this basis, from the standpoint of the voltage deviation, the harmonic contents of the node voltage and the load current, the influence of the grid-connected position and the grid-connected capacity of the distributed photovoltaic grid-connected generation system on the distri-bution network power quality was quantitatively analyzed.The simulation results show that the closer the grid-connect-ed position gets to the end of the line or the larger the grid-connected capacity is, the greater the influence of the pho-tovoltaic system on the power quality of the distribution network is, and the closer the node gets to the grid-connected position, the more serious the influence is.