Optimal Operation Of Distribution Network With Distributed Power Access

With the increasing depletion of global energy and the increase of greenhouse gas content,new energy power generation as an effective means to alleviate environmental pressure has attracted more and more attention.This paper mainly discusses the power flow calculation method of distribution network,and the influence of the grid location and capacity of distributed photovoltaic power on the whole system,and discusses how to configure it to better support the distribution network.First of all,three basic methods to solve the power flow are introduced,and the power flow analysis of the actual distribution network is carried out.Through the analysis of the IEEE33 node,it is found that the capacity of the distributed power supply and the location of its incorporation will affect the power flow and node voltage.Then,the multi-objective particle swarm optimization algorithm is used to search for the optimal combination of switches in the network and further optimize the topology of the distribution network with distributed generation.On this basis,a scheduling strategy for the optimal operation of distributed power and reactive power devices is proposed.The optimal operation scheme is identified by adjusting the network structure parameters and integrating distributed power to reconstruct the distribution network.Finally,based on the analytic hierarchy process,the comprehensive optimization evaluation indexes of photovoltaic operation in different periods are quantified;the objective function is established by considering the reduction of photovoltaic power,network loss and voltage deviation of grid connected nodes;the DPVG is connected to the distribution system by using the bare skeleton multi-objective particle swarm optimizer with less control parameters,on the premise of restraining voltage fluctuation,network loss and photovoltaic power reduction Combined with the comprehensive evaluation index,the optimal evaluation scheme of this period is determined.Three kinds of DPVGs installed on the terminal nodes of ieee33 distribution network are taken as examples to verify the effectiveness and rationality of this method.