Building full-direct current power supply and electricity storage system and control method

Abstract

The invention discloses a building full-direct current power supply and electricity storage system and a control method. The system comprises a renewable energy power generation device, a municipal power grid system, a first direct current / direct current conversion device, an alternating current / direct current conversion device, a first voltage direct current bus, a first energy storage device, and a first charge and discharge conversion device, wherein the first direct current / direct-current conversion device is used for converting the direct-current voltage generated by the renewable energypower generation device into a first voltage direct-current bus voltage; the alternating current / direct current conversion device is used for converting alternating current generated by the municipalpower grid system into direct current; the first charge and discharge conversion device is used for controlling the charging and discharging conversion of the first energy storage device; and the first voltage direct-current bus is connected with the first electricity utilization equipment and is used for supplying power to the first electricity utilization equipment. The building full-direct current power supply and electricity storage system and the control method have the advantages that the power supply and distribution efficiency can be improved, and the local renewable energy can be sufficiently consumed.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a building full direct current power supply and power storage system and a control method. Background technique [0002] At present, the indoor power supply of buildings is in the form of AC power supply. However, almost all electrical equipment uses DC power supply, for example, LCD monitors, personal computers, DC inverter air conditioners, LED lighting fixtures, etc. In the AC power supply mode, it is necessary to use a rectifier and voltage regulator device for each electrical device, which wastes hardware costs and causes power loss due to AC-DC conversion. In addition, with the development of photovoltaic power generation technology and the reduction of costs, more and more buildings are installed with renewable energy utilization devices such as photovoltaic power generation. Photovoltaic power generation and building power consumption are generally difficult to ma...

AI Technical Summary

Problems solved by technology

Photovoltaic power generation and building power consumption are generally difficult to match each other. There are differences between power generation power and power consumption, and renewable energy such as photovoltaic power generation cannot be fully utilized.

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