光伏发电系统接入10 kV配电网的设计

Design of Photovoltaic Power Generation System Connected to 10 kV Distribution Network

为解决光伏发电系统接入10 kV配电网时面临的设备配置、电压越限、短路电流及直流注入等问题,文章首先进行总体设计,主要包括科学合理配置光伏发电设备、调控接入配电网越限电压等;其次,详细设计了光伏发电接入应对方案,包括配电网电压应对方案、配电网短路电流应对方案以及直流注入应对方案;最后,设计了接入实验,对比了基于源荷协调的配电网接入、基于归一化指标的分布式电源接入以及文章所设计的方法。实验结果表明,文章提出的光伏发电系统接入方法在网络损耗及网损率等方面表现优异,网络损耗降低约70%,网损率平均下降60%以上。相较于其他两种方法,本设计全面地考虑了10 kV配电网的实际运行状况,通过采用针对性应对措施,实现了更高效的光伏发电系统接入。

In order to solve the problems of equipment configuration,voltage exceeding limits,short-circuit current,and direct current injection faced by photovoltaic power generation systems when connected to 10 kV distribution networks,this article first conducts an overall design,mainly including scientifically and reasonably configuring photovoltaic power generation equipment,regulating the voltage exceeding limits when connected to the distribution network,etc;Secondly,a detailed response plan for photovoltaic power generation access was designed,including a voltage response plan for the distribution network,a short-circuit current response plan for the distribution network,and a direct current injection response plan;Finally,an access experiment was designed to compare the distribution network access based on source load coordination,the distributed power source access based on normalization index,and the method designed in this paper.The experimental results show that the photovoltaic power generation system access method proposed in this paper performs well in terms of network loss and network loss rate,with a reduction of about 70%in network loss and an average reduction of over 60%in network loss rate.Compared to the other two methods,this design comprehensively considers the actual operating conditions of the 10 kV distribution network and achieves more efficient integration of photovoltaic power generation systems through targeted measures.