Multi-objective Coordinated Programming Of Source-network Based On Optimal Trusted Solution

With the continuous growth of power demand,distributed generation is widely used,so it is of great significance to introduce distributed generation such as wind turbine generators and photovoltaic generators into the coordinated planning of source-network.However,the uncontrollable nature of distributed generation and the increasingly complex situation of power grid structure seriously endanger the security of power system,leading to accidents frequently,the security of the system should not be neglected.Because the uncoordinated between the power supply side and the power grid side will lead to problems like the power imbalance of the power system in the planning,how to coordinate the operation of the planning of the power supply and the power grid is of practical significance.For the multi-objective programming problem,how to obtain the reliable preference of each objective to get the optimal solution is an important link to determine the planning results.Based on this,this paper studies the above problems,the main content is as follows.Firstly,this paper analyzes the development status of distributed generation,planning security,coordination and multi-objective algorithms at home and abroad.And this paper explores the source-network planning model which takes the minimum comprehensive cost of the whole society as the objective function,and studies the multi-objective bacterial colony chemotaxis algorithm and the method of optimal compromise solution.Secondly,considering the security of power supply and power grid,the cost of blocking compensation is introduced into the economic objective function,the "safety factor" is proposed as the security objective function,and the model constraints are improved,so as to obtain the dual objective source-network planning model considering economy and security.For the multi-objective model,a method for determining the optimal trusted solution based on credibility weight is proposed.Taking distributed generation such as wind turbine generator and photovoltaic generator and IEEE 33-node distribution system as example,the simulation is carried out by combining the multi-objective bacterial colony chemotaxis algorithm.The superiority of the proposedscheme and the reliability of the solution method are verified by the comparative analysis among different models,and the rationality of the proposed security objective function is verified by the sensitivity analysis.Finally,aiming at the coordination between the two sides of the source and the network,the "coordination factor" is proposed as the coordination objective function.A multi-objective planning model of source-network considering economy,safety and coordination is established,and after obtaining the Pareto optimal solution by the multi-objective bacterial colony chemotaxis algorithm,the proposed method for determining the optimal trusted solution based on credibility weight is used to obtain the final planning result.The feasibility of the proposed scheme is verified by numerical simulation,the superiority of the proposed scheme is proved by comparing with the previous scheme,and the rationality of the proposed coordination objective function is verified by the sensitivity analysis.