| The distributed access to the distribution network is a problem that must be considered in the distribution network,either through the active distribution network or the micro grid technology."Solar energy development" 13th Five-Year "plan" put forward a single village of not more than 300kW power plant.However,China has a vast territory and large regional differences.It is very important to make full use of solar energy resources and distribution network resources.In this paper,the optimal method is used to calculate the distributed PV capacity,and the existing constraints are classified from the angle of power grid operation.In this paper,we propose a scheme based on matrix description.The proposed method is based on the voltage drop as the constraint,the maximum and the maximum of the distributed PV access capacity as the objective function,and the genetic algorithm as the calculation tool.A point to point matrix is proposed to describe the relationship between nodes.Based on the matrix of the matrix to obtain the voltage drop constraint.From the point of view of sensitivity,the change of active power plays a major role in the change of voltage drop in the low voltage distribution network where the resistance can not be ignored.The power flow constraint is replaced by the voltage drop constraint,and the power flow iteration is avoided.According to the distributed PV without regional distribution according to the distance constraint,uniform distribution,uniform distribution of nodes according to three scenarios,the access capacity calculation scheme is applied to a typical distribution network,get access nodes of the distributed photovoltaic capacity value,and to verify the calculation results.The simulation results prove the feasibility of the scheme.Based on the calculation results,the general principle of the distributed PV access capacity is analyzed.By using the method of power flow,the paper summarizes the general principles of distributed PV access capacity. |
