Research On Self-healing Control Strategy Of Microgrid

Microgrid is an important part of smart grid,and self-healing is the basic feature of smart grid.Microgrid self-healing is an intelligent control method based on sensing the operating status of the microgrid.By adopting self-healing methods such as optimized control,preventive control,and emergency control,it can eliminate and reduce the probability of accidents and the degree of impact after they occur in a timely and accurate manner.It is an important feature of micro-grid self-healing control.First,introduced the three-layer structure of the microgrid self-healing control system.The self-healing control objectives and principles of the microgrid are studied.A three-layer structure self-healing control logic is adopted,and a self-healing control system system composed of a self-healing control master station,a communication transmission network and an intelligent terminal is adopted.Then,a corresponding self-healing control model is established for different operating states such as normal and fragile microgrid.Mainly based on the improved particle swarm algorithm,a micro-grid optimization control strategy is proposed,which can obtain a comprehensive optimal solution in terms of the safety and reliability of system operation.And through MATLAB simulation,the effectiveness of the proposed optimization control strategy is verified.Finally,the self-healing control after the microgrid failure is studied.Aiming at the two modes of distributed power operation,the self-healing control of the microgrid in the fault state is proposed with the system load removal and the minimum network loss after network reconfiguration as the objective function.Healing control model,a comprehensive power supply self-healing control strategy after microgrid failure is proposed.And through MATLAB simulation,the effectiveness of the proposed self-healing control strategy is verified.This thesis adopts a three-layer structure of micro-grid self-healing control system,and proposes two self-healing control strategies for micro-grid optimization control and emergency control after failure,which can improve the safety and reliability of micro-grid operation and realize self-healing function for micro-grid Has a certain meaning.