Research On Operation Optimization Strategy Of Micro-Grid Based On Role Autonomous Decentralized Control

The micro grid economic benefits is the main reason for micro-grid to attract investment and promote in electrical power system. But the micro-grid economic optimization operation is the main way to achieve this goal, so it is of great important significance for its research. At present its research main focuses on static optimal model regardless of storage optimization operation. However, there are some limitations for it to overall analyze the economic operation of micro-grid. Therefore, this thesis researched on micro-grid economic operation with considering the battery operating costs when it in island operation mode and grid connected operation mode. The main content was shown below.Firstly, analyzed the development of micro-grid energy management and optimization strategy, the micro-grid structure based on role autonomous decentralized control, as well as the P-Q control strategy and V-f control strategy; analyzed and simulated the quasi-steady-state mathematical model of micro power source; built and simulated the battery charging and discharging model and battery life calculation model. Secondly, for optimal operation problems of micro-grid based on role autonomous decent-ralized control in grid-connected mode, a dynamic economic optimization model for micro-grid users was established with full consideration of battery cycle life, power generation costs and TOU. Then, dynamic programming optimization method was used to solve the model.Finally, for its energy optimization operation problem in island operation mode, a multi object economic optimization scheduling model was built, which contained economic optimization and environmental optimization. Then, improved chaotic particle swarm algorithm was used to solved the optmization model.The simulation results showed that: the grid-connected economic optimization model of micro-grid user could fully optimize the operation of storage battery and distributed generation units and could maximize the economic benefits of microgrid users; the isolate economic optimization model of coordination system could fully optimize battery operation, and rational use of linear weighting factor enabled microgrids to minimize economic losses in exchange for the greatest environmental benefit.Overall, the effectiveness and practical significance of the improved microgrid operation optimization strategy had been vertified.