考虑网损及电压约束的分布式光伏并网容量匹配策略研究

Research on Capacity Matching Strategy of Distributed Photovoltaic Connected to the Grid Considering Network Loss and Voltage Constraints

分布式光伏(PV)大规模接入给配电网的规划及运行带来一系列影响,在大量PV亟待并网运行的趋势下,研究PV并网容量匹配策略具有重要意义。为此,分析了PV并网对网损及电压影响,从安全性及经济性角度出发,以电压及网损作为约束条件,得出适用于实际工程应用的PV并网容量计算公式,提出PV并网容量匹配策略及并网规划方法。通过对实际配电系统进行分析,验证了该计算公式及匹配策略的正确性和有效性。

The distributed photovoltaic large-scale access brings a series of impacts on the planning and operation of the distribution network. It is of great significance to study the distributed PV grid-connected capacity matching strategy under the trend that a large number of distributed PV need to be connected to the grid. Therefore,the effect of distributed PV grid connection on the grid loss and voltage was analyzed. From the point of view of safety and economy,the voltage and network loss were taken as constraint conditions to get the calculation of distributed PV grid capacity suitable for practical engineering application formula,and the distributed PV grid capacity matching strategy and process were proposed. Through the analysis of the actual distribution system,the correctness and effectiveness of the calculation formula and matching strategy are verified.