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Solar photovoltaic grid-connected inverter and solar inverter air conditioning system

A technology of solar photovoltaic and frequency conversion air conditioner, which is applied in photovoltaic power generation, conversion of irreversible DC power input to AC power output, light radiation generator, etc., can solve the problems of increasing system installation and maintenance costs, and achieve environmental protection , Reduce production costs and save energy

Inactive Publication Date: 2011-12-21
GUANGDONG CHIGO AIR CONDITIONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of power storage and energy storage units when using solar energy, the installation and maintenance costs of the system have been significantly increased. At the same time, the patent does not elaborate on how to realize the solar photovoltaic inverter system.

Method used

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  • Solar photovoltaic grid-connected inverter and solar inverter air conditioning system
  • Solar photovoltaic grid-connected inverter and solar inverter air conditioning system
  • Solar photovoltaic grid-connected inverter and solar inverter air conditioning system

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Embodiment 1

[0022] see figure 1 , represents a preferred embodiment of the photovoltaic grid-connected control system applying the solar photovoltaic grid-connected inverter of the present invention. The solar photovoltaic grid-connected inverter 2 is applied to the photovoltaic grid-connected control system of the solar inverter air-conditioning system, including a power circuit and a control circuit for controlling the power circuit, wherein: the power circuit includes a solar cell array 1 and a mains power supply DC / DC unit 21, Dclink unit 22, DC / AC unit 23 and filter unit 24 between the grid 3; the control circuit includes a main control circuit 29 with DSP as the core, an MPPT unit 25, an intermediate voltage detection unit 26, IGBT drive unit 27 and voltage synchronous detection unit 28 (output current and voltage synchronous detection unit). Each component is described below.

[0023] The above-mentioned DC / DC unit 21 completes the conversion of the low-voltage direct current pro...

Embodiment 2

[0038] see figure 2 , represents a preferred embodiment of the solar inverter air-conditioning system using the photovoltaic grid-connected inverter of the present invention, which includes a solar cell array 1, a DC boost module 5, an isolation diode 6, a solar photovoltaic inverter 2, and a DC inverter air conditioner 4.

[0039] figure 2 In the solution shown, since the above-mentioned photovoltaic grid-connected inverter 2 is connected to the DC boost module 5 , excess solar energy can be collected and fed back to the mains grid 3 . This solution is equipped with a photovoltaic grid-connected inverter control system, which can save the battery part, thereby greatly reducing the production and maintenance costs of the solar inverter air conditioning system.

[0040] The following further figure 2 The working principle and working process of the solar inverter air conditioning system shown will be further described.

[0041] Such as figure 2 In the system shown, the...

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Abstract

The invention discloses a solar photovoltaic grid-connected inverter, which includes a power circuit and a control circuit. The power circuit includes a DC / DC unit, a DC / AC unit, and a filter unit; Collect digital and / or analog signals in the system, control the power devices in the power circuit after completing the corresponding operations, and dynamically track the maximum power point of the solar cell array to adjust the working point of the solar cell array. The invention also discloses a solar inverter air conditioner system, which includes a solar cell array, a DC boost module, a solar photovoltaic grid-connected inverter, and a DC inverter air conditioner. The grid-connected inverter is connected between the DC step-up module and the utility grid. The invention realizes that the air conditioner is jointly driven by the solar energy and the mains power, and when the air conditioner is idle or the solar energy is surplus, the electric energy can be fed back to the city network.

Description

technical field [0001] The invention relates to the technical fields of power electronics and household appliances, in particular to a solar photovoltaic grid-connected inverter applied to an air conditioner and a solar variable frequency air conditioning system using the inverter. Background technique [0002] As the most potential energy in the 21st century, solar energy has been gradually developed and utilized due to its advantages of cleanness, environmental protection and abundant reserves. At present, solar air conditioners have appeared, most of which are heat pipe type. Its principle is to heat the heat pipe or hot water with solar energy, and then use the heat energy of the heat pipe or hot water to cool or heat. The utilization of solar energy is relatively limited. With the in-depth research on the application of solar energy in household appliances, outdoor units or air conditioners with solar panels installed on the top of houses have also become a research and...

Claims

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Application Information

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IPC IPC(8): H02M7/42H02N6/00H02J3/38
CPCY02E10/58Y02E10/563Y02E10/56
Inventor 方湘涛郑祖义崔严鹏陈育锋金听祥
Owner GUANGDONG CHIGO AIR CONDITIONING
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