A micro-grid system that realizes micro-power supply and load power balance

Abstract

The invention provides a micro grid system for balancing the power supplied by micro power sources and the power consumed by loads, and relates to the technical field of micro grid control. The balance relationship between the power which can be supplied by micro power sources and the power which is needed by loads in the micro grid system can be adjusted. The micro grid system comprises a micro grid system energy supply and use module, a micro grid system central control module, and an end data acquisition and control module. The micro grid system energy supply and use module is used for realizing power supply from the micro power sources to the loads. The micro grid system central control module is used for predicting the power which can be supplied by the micro power sources and the power which is needed by the loads in real time, making the system go into an island operation mode when the micro grid system is off-grid, constantly adjusting the island scope, determining the loads needing to be switched on and the loads needing to be switched off, and issuing a corresponding instruction. The end data acquisition and control module is used for switching on or off the loads under the control of the instruction issued by the micro grid system central control module. The micro grid system is used for supplying power to the loads independently when in an off-grid state.

Description

technical field [0001] The invention relates to the technical field of distributed energy generation and micro-grid control, in particular to a micro-grid system for realizing micro-power supply and load balance. Background technique [0002] Microgrid system is an intelligent and controllable small grid system that combines distributed power generation system, energy storage and terminal load, and it is an autonomous system that can realize self-control, protection and management. The microgrid system mainly includes a micro power supply for supplying electric energy and a load for consuming electric energy. Compared with the external grid, the microgrid system has two operating modes: grid-connected and off-grid: when the external grid supplies power normally, the micro power supply in the microgrid system is incorporated as an auxiliary power supply, and together with the external grid to deliver power to the load; When the power grid fails, the microgrid is disconnected...

AI Technical Summary

Problems solved by technology

[0003] However, when the microgrid system operates in the off-grid mode, there are generally the following problems: the existing microgrid system can only divide the island range once according to the importance of the load, so in the subsequent power supply process, the existing microgrid system It is not possible to adjust the relationship between the electric energy that can be supplied by the micro-power source and the electric energy required by the load in the micro-grid system, so that the two can reach a balance

For example, when the power supplied by the micro-power source is less than the power required by the load, that is, the micro-grid system is not enough to supply power to the existing load, it will reduce the safety and reliability of the micro-grid system operation; or, when the micro-power source can supply The electric energy is greater than the electric energy required by the load, that is, when the microgrid system can supply power to more loads, the utilization rate of energy is reduced, and energy is wasted to a certain extent.

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