Power distribution network-multi-microgrid system based on energy router, and scheduling method thereof

Abstract

The invention discloses a power distribution network-multi-microgrid system based on an energy router, and a scheduling method thereof, and belongs to the technical field of power systems. The system comprises a power distribution network, one or more energy routers and a plurality of combined cooling heating and power supply type microgrids; an electrical connecting line and a heat energy pipeline are built between each micro-grid and one energy router, and each energy router and the micro-grid connected with the energy router form an area; and electrical connecting lines are built between the energy routers and the power distribution network and between the energy routers. The method comprises the following steps: establishing an optimal scheduling model of a power distribution network and a micro-grid; solving the optimal scheduling model of the power distribution network to obtain the interaction power of each electrical tie line as the constraint condition of the optimal scheduling model of the micro-grid, and solving the lower-layer optimal scheduling model to obtain the output of each device in each micro-grid; and iteratively selecting an optimal scheduling plan. The system operation cost can be reduced, and the stability of the power distribution network is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and more specifically relates to an energy router-based distribution network-multi-microgrid system and a scheduling method thereof. Background technique [0002] Under the new situation proposed by the concepts of carbon peaking and carbon neutrality, vigorously developing distributed power sources and improving energy utilization have become a hot issue. Complementarity has become a new development trend. With combined cooling, heating and power (CCHP) as the core microgrid, the comprehensive energy utilization rate is as high as 90%. At the same time, multiple energy sources support each other, which improves the stability and reliability of the traditional microgrid system . With the advantages of efficient energy utilization, flexible dispatching methods, and less environmental pollution, the combined cooling, heating and power microgrid serves as a terminal energy supply sy...

AI Technical Summary

Problems solved by technology

According to the current research, the following outstanding deficiencies are found: 1) The research on the integration of integrated energy microgrids into the active distribution network does not consider the interaction of multi-energy flows between the microgrids on the active distribution network and the microgrid. The influence brought by the coordinated operation of the network group does not sufficiently explore the characteristics of the Energy Internet; 2) For the complex model that comprehensively considers the optimization of the distribution network and the coordinated operation of multiple micro-grids, there is a problem that the existing intelligent algorithm has insufficient optimization capabilities; 3) As the core equipment of the Energy Internet, the energy router is of great research value to apply the energy router to the planning and optimal operation of the integrated energy system. At present, the research on the optimal operation of the energy router in the multi-energy coupling system is still relatively lacking.

[0004] In general, the existing system that integrates the distribution network and multi-integrated energy micro-grid needs to be further optimized in terms of system operating costs and distribution network stability.

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