分布式光伏扶贫多点接入配电网最大容量分析

Analysis of Maximum Capacity of Distributed Photovoltaic Poverty Alleviation with Multiple Access Points to Distribution Network

为解决分布式光伏扶贫项目多点接入配电网最大允许容量缺乏有效分析方法的问题,本文在总结光伏扶贫接入配电网典型模式基础上,针对分散多接入点模式,以电压偏差、线路极限传输容量及配电变压器额定容量为约束条件,建立分布式光伏扶贫接入低压配电网最大容量优化模型,提出罚函数法求解该模型的方法,针对某光伏扶贫项目最大接入容量进行定量计算。结果表明,该方法能够有效计算出低压配电网可接入的分布式光伏扶贫容量限制,可为指导分布式光伏扶贫安全、可靠接入低压配电网提供借鉴和参考。

The calculation of the maximum capacity of a distributed photovoltaic(PV)poverty alleviation project with multiple access points to distribution network lacks efficient analysis methods. To solve this problem,based on the summary of typical modes of PV poverty alleviation with access to distribution network,an optimization model of the maximum capacity of distributed PV poverty alleviation with access to low-voltage distribution network is established. This model aims at the distributed access mode,and takes the voltage deviation,limit transmission capacity of lines and the rated capacity of distribution transformer as its constraints. In addition,a penalty function method is proposed to solve this model,and the maximum access capacity of one PV poverty alleviation project is quantitatively calculated. Results show that the proposed method can effectively calculate the limit on the access capacity of distributed PV poverty alleviation,providing guidance and reference for the safe and reliable access of distributed PV poverty alleviation to low-voltage distribution network.