分布式光伏和电动汽车接入对配电网网损和电压偏移影响的分析研究

Effects of Distributed Photovoltaic Generation and Electric Vehicle Integrating into Distribution Network on Line Loss and Voltage Drift

研究了分布式光伏与电动汽车接入对配电网网损和电压偏移的影响。首先建立了分布式光伏的出力模型与电动汽车的充电模型。基于该模型,研究了分布式光伏与电动汽车接入配电网产生网损和电压偏移的原理。然后,分析了不同接入方式、不同并网位置、不同并网容量以及不同时间段下分布式光伏与电动汽车接入对配电网网损和电压偏移影响。结果表明,光伏渗透率为20%时,分布式光伏与电动汽车适宜集中接入线路中前端。典型日24 h中,配电网网损呈波浪型变化趋势,节点电压呈先升高后下降的趋势。

This paper focuses on the effects of distributed photovoltaic generation and electric vehicles integrating into distribution network on line loss and voltage drift.Firstly,the model of distributed photovoltaic output and electric vehicle charging is established,and the principle of the network loss and voltage drift caused by the distributed photovoltaic generation and electric vehicle connected to the distribution network is studied based on the model.Then the effects of the distributed photovoltaic generation and electric vehicles integrating into distribution network with different integration modes,locations and capacities as well as different time periods on the network loss and voltage drift are analyzed.The results show that the distributed PV and electric vehicle is suitable for integration into the front end of the line when the PV Permeability is 20%.In addition,the distribution network loss shows a trend of wave-like changes within 24 hours in the typical day,and the node voltage increases firstly and then decreases.