Study On The Economic Dispatch Strategy Of Power System Based On The Consensus Of Multi Agent System

With the development of society,the development of all walks of life almost cannot leave the support of electric power,the country's economic development is closely related to the security and stability operation of the power system.The study of economic dispatch problem occupies an important position in the operation and control of power system,under meeting the power balance constraint and other constraints,the goal to minimize the generation cost of power system is achieved,with the conventional power grid develop into the future smart grid,it is difficult to realize the effective scheduling of smart grid by using the centralized scheduling method.This thesis is devoted to the study of the smart grid scheduling problem by using the consensus algorithm of multi agent system.The main contents of the thesis are listed as follows:Firstly,considering the unbalanced communication of generators,based on the consensus algorithm of multi agent system,we define a new weight matrix to solve the challenge of the row sum of weight matrix not equal to 1 under unbalanced communication topology,the reliability and robustness of the proposed algorithm is verified by simulation of several typical test scenarios.Secondly,considering the power losses of power system,compare to the Kron's loss formula of conventional method,the thesis propose a dispatch strategy to compute the power losses accurately.We get the contributions of generators on power losses by using the electricity tracing method and electrical dissection method,then the penalty factors of power losses for generators can be evaluated,several case studies are presented by using MATLAB to show the effectiveness of the proposed approach.Lastly,to address the serious challenge of the large amounts of data interaction for the limited bandwidth of communication network,we propose a dispatch strategy based on the event-triggered scheme to reduce the communication burden.Based on the continuous time consensus algorithm of multi agent system,we design a trigger condition and propose a distributed algorithm,it shows that the incremental cost of each generator can send information to its neighbor generators with the form of discrete non cycle through the designed trigger condition,and it also verifies the effectiveness of the proposed approach by using the simulation of MATLAB.