Optimization Design Of Distribution Network With Distributed Generation

As governments to vigorously support and the development of renewable energy,Distributed Generation based on renewable energy,with the advantages of environmental friendly,small-scale,small investment,and flexible of power supply,so that much more DGs in the distribution network system will be one of the trend of power industries.The access of distributed generations meet a series of problems,such as the operation mode of distribution network,power flow,distribution,voltage,network loss,etc.Because with the DG access location and access capacity is different,there will be different effects,so the access of DG can be better planning.In this paper,the network parameters will be changed by the access of distributed generation,so as to affect the power flow,power loss and voltage quality in the network,the paper mainly considering the investment and operation cost of DG access under the influence of network loss,seeking best DG access location and capacity for the maximum economic benefit.Paper first introduces the main distributed generation technology based on renewable energy,from the aspects of system operation and planning of distributed generation supply access to impact some of the traditional distribution network system;Then focus on the influences about distributed generation supply access to distribution network mainly on voltage and active power loss,And then has carried on the theoretical analysis and simulation analysis using MATLAB/Simulink tools.The paper major research work is to consider DG minimum investment cost and minimum energy loss of the system at the same time,optimize the DG into distribution network system planning.The optimum objective function are established,and the investment cost of active power loss and the overall cost of purchasing electricity,and using improved particle swarm(IPSO)algorithm is analyzed.Finally,based on the IEEE33 nodes distribution system analysis of the examples based on the solution under different conditions of optimal planning model the capacity and the best location of DG and optimal access to the largest capacity,verify the feasibility of the model.