Research on Multi-Microgrid Distributed Optimization Operation Method

In recent years, the rapid development of national economy leads to the severe expansion of power consumption and the scale of power grids, coupled with the continuous reduction of non-renewable energy such as fossil energy, etc., people have high expectations for the efficient use of clean energy. In order to cope with the shortcomings of large power grids that are likely to spread to the whole network once a failure occurs due to the strong integrity of the large power grid, and the efficient use of new energy, multi-micro grid distributed power generation has occurred to our mind. Currently, there are two mainstream control strategies for microgrids, one is centralized algorithm and the other is distributed algorithm. The two algorithms have their own advantages and disadvantages. However, with the continuous development and expansion of the power grid, the centralized algorithm is increasingly burdened by the system, and gradually becomes inefficient and slow in response and process. Aiming at the multi-microgrid distributed system in the grid-connected operation state, this paper proposes optimization goals by constructing mathematical models for each part of the microgrid and the main grid. Finally, a case analysis is carried out based on the IEEE33 node model, and the calculation of the application of the alternating direction method of multipliers (ADMM) is discussed. Analyzes the feasibility, advantages and disadvantages of the ADMM algorithm in the distributed optimization operation of multi-microgrid, the results show that the ADMM algorithm has a well feasibility in the distributed optimization operation of multi- microgrid.