Research On Distribution Feeder Reconfiguration Strategy Considering Distributed Generation And Plug-in Electric Vehicles

In recent years, the power distribution system has become large-scale and had complicate structure, which leads to system power loss has increased and voltage adjustment ability has become weak. What's more, the penetration of new energy power generation system and electric vehicle increases year by year, the characteristic of its randomness can make system operation more unstable, how to effectively optimize the system operation is more and more critical.Distribution system in common optimization methods are distribution feeders restructuring way, through the change of power transmission line system to improve system, in addition,in recent years,scholars have also put a lot of research into the configuration of distributed power supply problems, but for the moment, applies both to systematic study is not much.For the purpose of distribution network optimization strategy research,this article first studied the related techniques/methods.Introduces a new type of swarm intelligence algorithm,fireworks,according to its principle,implementation process and calculation process is completed based on optimization algorithm to reconstruct the distribution network system, and designed a "ring" switch numbering,in order to reduce its create ring is in the process of optimization and feeder to reduce system in the process of restructuring the possibility of producing unqualified solution, and through the breadth-first search number and radiation/island test procedure to test the system's topology structure.For feeder reconfiguration and optimized configuration of distributed power supply is studied.Based on the optimization strategy, to optimize the system network loss ratio and voltage deviation index before and after building the optimization goal, set up the trend, feeder capacity constraints, distributed power supply capacity constraint and system topology constraints set of constraints.Also through voltage stability index of the distributed power position preprocessing, the need to consider the capacity of distributed power supply problem in the process of optimization, simplify the optimization process.In view of electric cars and wind power distribution system optimization research are introduced.To system network loss cost and power cost, and switching and electric cars running cost cutting costs four parts to build the optimization goal, constraint condition in addition to the foregoing constraint set,also introduces the electric car operation constraints.Based on the technology of V2G concept, in does not affect the electric cars under the condition of normal use, through the optimization of the electric car throughout the state of charge and discharge,and combining with active reorganization of feeder, keep the power distribution system in the most economic and efficient operation.Aiming at the problems mentioned in IEEE33 node and PG&E 69 nodes has carried on the simulation test system, and the results show the proposed method has better optimization features.Study of the above two problems,adopt the IEEE-33 and PG&E 69 test system by research methods for simulation.