A solar-storage multi-microgrid system with series and parallel structures

Abstract

The invention provides an optical-storage multi-microgrid system with a series and parallel structure. The optical-storage multi-microgrid system includes a primary system and a secondary system; the primary system includes a distribution network, a multi-microgrid bus, at least three Each sub-microgrid includes photovoltaic power generation system, energy storage system and load equipment; the secondary system is a control system, which includes a regional central controller and a regional integrated terminal; at least three sub-microgrids include A series sub-microgrid and at least two parallel sub-microgrids; in a series sub-microgrid, the photovoltaic power generation system, energy storage system and load equipment are connected to the busbar of the multi-microgrid through circuit breakers and contactors, and the busbar of the multi-microgrid It is connected to the distribution network through circuit breakers and contactors; each parallel sub-microgrid includes a sub-microgrid busbar, in which photovoltaic power generation systems, energy storage systems and load equipment are connected to the sub-microgrid busbars through circuit breakers and contactors. Connection; the sub-microgrid is connected to the multi-microgrid bus through circuit breakers and contactors.

Description

technical field [0001] The invention relates to a light-storage multi-micro-grid system with series and parallel structures. Background technique [0002] The connection of distributed power generation to the distribution network is conducive to the local decentralized utilization of new energy and improves the reliability of power supply for users. However, distributed power generation is intermittent and random, and its unstable power generation method brings considerable difficulties to the safe and stable operation of the power grid. As an effective way for distributed power generation to be connected to the grid, the microgrid combines power generation systems, energy storage systems and loads, and through the cooperation of related control devices, not only solves the problem of large-scale access to distributed power generation systems, but also fully The advantages of the distributed power generation system have been brought into play, and other benefits have also b...

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Problems solved by technology

[0004] Chinese patent application 201220002686.4 discloses a microgrid system for laboratories. The microgrid system only includes the primary system and does not involve the design of the secondary system. The microgrid system does not have perfect functions, and the microgrid system in the application is Single microgrid, not suitable for multi-microgrid key technology research

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