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Device for achieving switching between photovoltaic power supply and grid

A photovoltaic power supply and photovoltaic cell technology, which is applied in circuit devices, photovoltaic power generation, emergency power supply arrangements, etc., can solve the problems of undisclosed photovoltaic power supply and grid switching, and achieve the effects of simple maintenance, reasonable design and low failure rate.

Inactive Publication Date: 2014-05-21
STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the implementation device for switching between the photovoltaic power source and the power grid has not been disclosed in the prior art.

Method used

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  • Device for achieving switching between photovoltaic power supply and grid

Examples

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Comparison scheme
Effect test

Embodiment 1

[0011] Example 1, such as figure 1 As shown, a device for realizing switching between photovoltaic power source and power grid, the device includes a power source selection control module connected to the power grid and load, the power source selection control module is connected to an inverter, and the inverter is connected to a charge and discharge controller connection, the charge-discharge controller is connected to the photovoltaic cell array, and the battery is connected in parallel on the connection line between the inverter and the charge-discharge controller; the photovoltaic cell array charges the battery through the charge-discharge controller, and then the DC The voltage is inverted into AC voltage, and then connected to one input terminal of the power selection control module; the other input terminal of the power selection control module is connected to the grid; the output terminal of the power selection control module is connected to the load.

Embodiment 2

[0012] Embodiment 2, in the realization device of photovoltaic power supply and power grid switching described in embodiment 1: the power selection control module includes a STM8 single-chip microcomputer, and a selection relay and an AC / DC converter are connected to the STM8 single-chip microcomputer.

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Abstract

The invention relates to a device for achieving switching between a photovoltaic power supply and a grid. The device comprises a power supply selection control module connected with the grid and a load, the power supply selection control module is connected with an inverter connected with a charging and discharging controller, the charging and discharging controller is connected with a photovoltaic cell array, and a storage battery is parallelly connected onto a connecting circuit of the inverter and the charging and discharging controller; the photovoltaic cell array charges the storage battery through the charging and discharging controller, inverts a direct current voltage into an alternating current voltage through the inverter and is connected with one input end of the power supply selection control module; the other input end of the power supply selection control module is connected with the grid; and the output end of the power supply selection control module is connected with the load. The device is reasonable in design, capable of performing automatic switching, safe, reliable, free of noise and pollution, low in fault rate and convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a device for realizing switching between a solar photovoltaic power supply and a power grid. Background technique [0002] Solar energy is a clean, efficient and inexhaustible clean energy. In recent years, solar photovoltaic technology and industry have developed rapidly. If the solar photovoltaic power generation industry can be introduced into every household, every household can use this resource at all times without affecting the normal power consumption of the family. This will be a new era. It has a good development prospect and application value. However, there is no disclosed device for realizing switching between the photovoltaic power source and the power grid in the prior art. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a device for realizing switching between photovoltaic power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCY02B10/70Y02E10/56
Inventor 衡思坤朱立位尹雷应展烽郭昊坤王万纯
Owner STATE GRID JIANGSU ELECTRIC POWER CO LIANYUNGANG POWER SUPPLY CO
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