Design And Implementation Of Intelligent Distribution Network Control System Based On Distributed Power Supply

The electrical equipment related to the distributed power supply is gradually becoming mature,which can be widely used and connected to the distribution network for power supply.The distribution network will be changed from the traditional distribution network(passive,radial open-loop operation)to the intelligent distribution network(active,closed grid operation).The access to the distributed power supply will bring profound changes to the traditional grid planning and operation.It is found that the distributed generation is usually connected to the medium and low voltage power grid,so its impact on the power grid is mainly reflected in the medium and low voltage distribution network,which can only passively distribute power to users.In contrast,in the case of access to distributed power,intelligent distribution network has many advantages.The power grid relies on internal power supply to realize centralized transmission and distribution,and scientific and reasonable energy system planning is the premise of safe,reliable and economic operation of energy system.Distributed power supply can provide users with comfortable and environmental protection energy.Smart grid is the combination of distributed power and main power management.The distribution network under the smart grid is also called the intelligent active distribution network or power supply system.According to the influence of the grid connection of the distributed power on the operation and planning of the distribution network,the distribution network expansion planning model of the distributed power is proposed to optimize the distribution network structure based on the two-stage planning method.The traditional planning did not consider the type of power supply and operating time,a kind of method has been put forward,which is based on annual load duration curve and the performance cost,combining the cost of all kinds of power supply characteristics,and annual load duration curve,under the condition of meet the demand of power supply,choosing the power of the minimum average cost,so it can minimize the cost.