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Solar off-grid and grid-connected control method for hybrid solar and commercial power supply

A control method and mains control technology, applied in battery circuit devices, renewable energy integration, photovoltaic power generation, etc., can solve problems such as being unable to be suitable for various users, and achieve the effects of ensuring stable power supply, reducing impact, and low implementation costs

Inactive Publication Date: 2015-04-22
JA YANGZHOU SOLAR PHOTOVOLTAIC ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the products on the market have fixed specifications and cannot meet the different needs of various users

Method used

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  • Solar off-grid and grid-connected control method for hybrid solar and commercial power supply
  • Solar off-grid and grid-connected control method for hybrid solar and commercial power supply

Examples

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Embodiment Construction

[0032] Such as figure 1As shown, the solar off-grid control method for hybrid power supply of solar energy and commercial power in the present invention is implemented based on a solar off-grid system; the solar off-grid system includes a first diesel generator 103, a second diesel generator 104, a storage battery 105. Solar grid-connected inverter 106, bidirectional grid-connected inverter 107, mains control switch 108 and centralized controller 109; the input end of mains control switch 108 is used to connect mains power supply terminal 101, solar grid-connected inverter The input end of the inverter 106 is used to connect the power supply end 102 of the photovoltaic power generation system, the input end of the bidirectional grid-connected inverter 107 is connected to the power supply end of the storage battery 105, and the centralized controller 109 is respectively connected to the mains control switch 108 and solar grid-connected The inverter 106, the first diesel generat...

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Abstract

The invention relates to a solar off-grid and grid-connected control method for hybrid solar and commercial power supply. The control method is implemented based on a solar off-grid and grid-connected system. The state of a solar grid-connected inverter, the state of a two-way grid-connected inverter, the state of a diesel generator, and the state of a commercial power source are acquired and judged, and then, the working modes of the solar grid-connected inverter, the diesel generator, the two-way grid-connected inverter, and a commercial power source control switch are coordinated. Intelligent control on hybrid solar and commercial power supply is realized, solar power generation, power generation by the diesel generator and power supply through energy storage of a battery are managed and coordinated in a unified way, and the stability and reliability of hybrid solar and commercial power supply are improved in an overall manner. Moreover, the method of the invention can be implemented by sophisticated hardware products, has the advantages of wide application range and low cost of implementation, and overcomes the drawbacks in the prior art such as fixed specifications and poor adaptability.

Description

technical field [0001] The invention relates to a solar off-grid control method for hybrid power supply of solar energy and city electricity. Background technique [0002] With the progress and development of society, people's demand for electricity continues to increase. At present, there are still many areas in a state where the mains power supply is not comprehensive, and short-term or long-term power outages often occur. The use of new energy is a supplement to the mains power, especially with the continuous improvement and promotion of solar power generation technology, the photovoltaic system needs to have two functions of off-grid and grid-connected operation at the same time. Most of the products on the market have fixed specifications and cannot meet the different needs of various users. The key to system control is how to effectively utilize mature products and do a good job in unified control and management to meet various system requirements. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J9/08
CPCH02J3/383H02J7/35H02J9/08H02S10/00Y02B10/70Y02E10/56
Inventor 龚铁裕王晓东赵建军
Owner JA YANGZHOU SOLAR PHOTOVOLTAIC ENG
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