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System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery

A photovoltaic cell and energy storage battery technology, applied in photovoltaic power generation, battery circuit devices, current collectors, etc., can solve problems such as inability to guarantee and guarantee the continuity of power supply, and achieve the effect of saving electricity bills, supplying stable power supply, and saving power resources.

Inactive Publication Date: 2013-12-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot guarantee that the power supply can still be continued in the event of a power outage, that is, the continuity of the power supply cannot be guaranteed

Method used

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  • System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery
  • System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery
  • System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery

Examples

Experimental program
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Effect test

Embodiment 1

[0062] figure 1 It is a schematic diagram of the overall framework of the system, as shown in the figure: a coordinated power supply system of commercial power, photovoltaic cells and energy storage batteries provided by the present invention, including solar photovoltaic cells, battery packs, commercial power access terminals, central controllers, solar DC -AC converter, battery pack DC-AC converter, power corrector PFC, busbar;

[0063] The solar photovoltaic cell is connected to the busbar for power supply through a solar DC-AC converter;

[0064] The battery pack is connected to the busbar for power supply through the battery pack DC-AC converter;

[0065] The mains access terminal is connected to the bus power supply through a power corrector PFC;

[0066] The central controller is respectively connected to the solar photovoltaic cell, the storage battery pack, and the mains access terminal, and the central controller is used to obtain and compare the discharge state of...

Embodiment 2

[0098] The difference between this embodiment and embodiment 1 is only:

[0099] This example will combine figure 1 Each key part of the present invention is described in detail. figure 1 , 4 The dotted line in represents the PWM wave switch control signal sent from the central controller, figure 1 Mainly by ① mains power supply part is equivalent to the mains power access terminal in embodiment 1, power corrector PFC, ② solar photovoltaic cell power supply part is equivalent to the solar photovoltaic cell in embodiment 1, solar photovoltaic cell voltage and current detection device, MPPT control module, ③ the battery power supply part is equivalent to the battery pack and the battery pack DC-AC converter, the battery pack charging circuit, and the battery pack voltage detection device in Embodiment 1, and ④ the control part is equivalent to the central controller in Embodiment 1 It consists of four parts.

[0100] (1) Mains power supply part

[0101] As a supplementary e...

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Abstract

The invention discloses a system and a method for supplying power cooperatively by a mains supply, a photovoltaic cell and an energy storage battery. The method comprises the steps of firstly, acquiring a maximum output power and a load required power of the solar photovoltaic cell; if the maximum output power is greater than the load required power, starting the solar photovoltaic battery to supply power and charge the battery; and if the maximum output power is less than the load required power, starting the battery to supply power or starting the mains supply to supply power. According to the system and the method, the photovoltaic cell, the mains supply and the battery used as energy sources pass through self converters to have a unified output standard, and supply power to a bus, and each load receives energy from the bus through a DC-DC (direct current) converter and a DC-AC (alternating current) converter. Based on the structure design of the bus, various loads, including AC loads or DC loads, even loads with different voltages, in a power supply system can be satisfied, so that the structure can concurrently take different power supply requirements of various loads into consideration, can facilitate the expansion of the system, and also can facilitate the application of the system in different situations, therefore, the system and the method disclosed by the invention are wide in application range.

Description

technical field [0001] The invention relates to the field of coordinated power supply of energy storage batteries, in particular to a system and method for coordinated power supply of commercial power, photovoltaic cells and energy storage batteries. Background technique [0002] As a renewable energy source, solar energy has the advantages of wide distribution, unlimited clean resources, etc., and is an important member of new energy sources. Making full use of solar energy can reduce the use of fossil fuels, thereby protecting the environment and reducing pollution. Therefore, solar energy technology has received more and more attention, and various application methods have flourished. [0003] There are many ways and types of solar energy utilization, and solar photovoltaic power generation is one of the important ones. However, there are some shortcomings in solar photovoltaic power generation, such as strong randomness of power supply with seasonal or climate changes,...

Claims

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Application Information

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IPC IPC(8): H02J7/35
CPCY02E10/56
Inventor 廖孝勇孙棣华刘卫宁古曦赵敏郑林江王观勇
Owner CHONGQING UNIV
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