Energy storing device for supplying valley current at peak of current supply

Abstract

The invention discloses an energy storing device for supplying valley current at the peak of electricity supply. The energy storing device comprises an electric return circuit formed by connecting the electronic components, wherein, a two-way converter is connected with a storage battery pack, a controller and a detection circuit; the controller is connected with a human-machine interface; the two-way converter is a voltage-type three-phase half-bridge rectifier/converter comprising three single-phase half-bridge converter bridge arms; the controller has a double-CPU structure with DSP (digital signal processing) chips and single-chip; the human-machine interface is a liquid crystal display (LCD) module; the detection circuit adopts the commercial power input detection, the converter output detection and the storage battery detection; and a hall sensor is used for sampling voltages and currents. By charging the storage battery when the electricity price is lower at the valley of the power supply and partially or fully discharging the load from the storage battery through inversion, the invention can solve the problem of the imbalance between supply and demand of the electric energy and achieve the effect of 'peak load shifting' as the effective supplement to the national grid.

Description

technical field [0001] The invention relates to an energy storage device, which is an electric energy storage device for solving the problem of unbalanced supply and demand of electric energy. Background technique [0002] Due to the constraints of economic, environmental, technical and policy factors, it is difficult for the development of the power grid to keep up with the pace of power demand growth. At the same time, in the process of large-scale development of the power grid, there will inevitably be unreasonable structural problems for a period of time or even for a long time. . For example, the installed capacity of the system is difficult to meet the demand of peak load; the transmission capacity of the existing power grid lags behind the needs of users; the requirements of users for power quality and reliability of power supply are getting higher and higher. Contents of the invention [0003] The purpose of the present invention is to provide an energy storage de...

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Problems solved by technology

For example, the installed capacity of the system is difficult to meet the peak load demand; the existing power grid lags behind the needs of

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