Energy Control Of Multi-microgrids Using Distributed Fuzzy P Systems With Promoters

As distributed generations(DGs,for short)are connected to the grid on a large scale,microgrid become a useful method of DGs accessing to the grid.And multiple neighboring microgrids in a certain area are interconnected to form a multi-microgrid system.In the process of the microgrid moves towards the smart grid,the multi-microgrid system has become a hot research topic of new-type grid after single microgrid.O ne of the main goals of multi-microgrid systems energy management is to realize the stable and reliable operation of multiple sub-microgrid systems in the multi-microgrid systems and achieve reasonable and effective energy interaction between the multi-microgrid systems and the large power grid.Compared with a single microgrid,multi-microgrid systems need to complete three key jobs to achieve system stability and ensure power supply reliability and power quality,including ensuring individual control and normal operation of the internal sub-microgrid systems under the grid-connected or autonomous operation modes,achieving coordinated control among the sub-microgrid systems,and maintaining the power balance between the multi-microgrids and the connecting grid.Moreover,due to the randomness and volatility problems of DGs accessed to the grid,the uncertain and inaccurate information contained in multi-microgrid systems is more than that of a single microgrid.Therefore,it is necessary to further study the energy management and control technology of the multi-microgrid systems.Fuzzy membrane computing has powerful information processing ability and great parallelism,so it can deal with uncertain and inaccurate information.Furthermore,d P systems differ from other P systems with the ability to deal with distributed inputs problems,which makes themselves more suitable for distributed control and optimization areas.Therefore,in this paper,the research on the power balance and coordinated control in energy management and control of multi-microgrid has been carried out in depth with the fuzzy P systems and distributed P systems.Firstly,Cell-like Fuzzy P Systems with Promoters(PCFPS,for short)are proposed based on the cell-like fuzzy P systems and promoters.Combining the distributed P system,the fuzzy theory and the promoters,Distributed Fuzzy P Systems with Promoters(PFd PS,for short)are proposed.And the detailed definitions and internal rules are given.At the same time,two different promoters are defined for the above two systems.Moreover,the power balance reasoning tests of single multiple multi-microgrid and multiple multi-microgrids have been done.Then,PCFPS are used to construct PCFPS coordinated control systems,and PFd PS are used to build PFd PS coordinated control systems.Furthermore,the internal rules are set in detail and the inference test is conducted,and the coordinated control method are discussed.Finally,the rationality and effectiveness of the multi-microgrid PFd PS coordinated control system are further verified by MATLAB simulation.The experimental results show that the multi-microgrid PFd PS coordinated control system can effectively manage and control multi-microgrid,and realize the independent control and normal operation of the sub-microgrids in the grid-connected mode and isolated mode.At the same time,the coordination and control between internal sub-microgrids is achieved,the energy interaction between the multi-microgrid system and the large power grid is realized,and the frequency of the AC feeder can be maintained.