Distribution Network Load Distribution Optimization Method Based On Total Power Supply Capacity

The distribution network is an important connection between power generation,transmission and users.The distribution network planning directly affects the safe and reliable continuous supply of users.Therefore,scientific planning and optimization of distribution networks and improvement of their power supply capacity have major social implications and economic significance.With the dramatic increase in electricity demand,distribution network's load imbalance,low power supply efficiency,high network loss and other drawbacks will follow.Therefore,this paper starts with optimizing the load distribution of distribution network and proposes the optimization method of the load distribution based on the total supply capability,the main work is as follows:Firstly,for a distribution network with a fixed network structure,the load distribution optimization methods include: new load access and load change,and they are established into the mathematical model using mathematical modeling methods,and the corresponding constraint conditions are proposed.The model not only considers the total supply capability,but also considering the balance of the load,the economics of the system,and the N-1 safety,the safe and efficient operation of the distribution network is achieved.Secondly,This multi-objective optimization problem is proposed to be solved by an intelligent optimization algorithm,an artificial bee colony algorithm,which overcomes the shortcomings of subjectivity and inefficiency in the previous solutions,and makes the distribution network achieve the maximum degree of searching optimization.And use two examples to solve programming with MATLAB,The results prove the practicability and feasibility of the model and the efficiency of the algorithm.Then,For distribution networks with non-fixed network structures,load distribution optimization methods include: changing the switch status and position.Therefore,based on the theory of power distribution network reconfiguration,this paper roposes a reconfiguration model based on power supply capacity enhancement to obtain the final switch opening and closing state and optimize load distribution,in which graph topology is used to represent the topology structure of the network,which is concise and clear;and forward pushback method which is more suitable for distribution network structure is selected in current calculation module.Finally,in MATLAB2010(a),the genetic algorithm based on the total power supplycapacity reconstruction is simulated and verified,and applied to the 70-node bus system.The results show that after the reconstruction of the actual power grid,the network loss decreases,and the power supply capacity and node voltage level increase.The study of the example shows that the reconstruction of distribution network based on the total power supply capacity is of great significance for reducing the production cost of the power plant and improving the overall efficiency of the power plant.It can provide reference for realizing the automation level of the power grid and the construction of the power grid.