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Photovoltaic system and control method thereof

A photovoltaic system and control method technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve problems such as power waste, system maintenance inconvenience, and photovoltaic battery components affecting the lifespan, etc., to ensure service life, reduce standby loss, The effect of increasing safety and reliability

Inactive Publication Date: 2017-01-04
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] This kind of photovoltaic system has at least the following defects: when the air conditioner is in standby, the power consumption of the whole system is large, causing unnecessary waste of electric energy; In the case of switching, there is a danger of electric shock when overhauling the air-conditioning unit or photovoltaic cell components; photovoltaic cell components are easily impacted by the DC bus voltage and affect their life

Method used

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  • Photovoltaic system and control method thereof

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Embodiment Construction

[0030] In order to solve the problems in the conventional photovoltaic system mentioned in the background technology section, the present invention provides a photovoltaic system.

[0031] Such as figure 1 As shown, the photovoltaic system of the present invention includes a photovoltaic cell assembly 1, an air conditioning unit 2, a converter unit 3, a first switch 4, a second switch 5, and a switching power supply (preferably a high-voltage power supply switch) 6, wherein,

[0032] The output end of the photovoltaic cell assembly 1 is connected to the first end (the left end in the figure) of the conversion unit 3 via the first switch 4, the first switch can also be called a DC side switch,

[0033] The second end of the converter unit 3 (the right end in the figure) is connected to the grid 9 through the second switch 5, which can also be called an AC side switch,

[0034] The switching power supply 6 has a DC power taking branch 61 and an AC power taking branch 62, wherei...

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Abstract

The invention provides a photovoltaic system and a control method thereof. The photovoltaic system comprises a photovoltaic battery pack, a current transformer unit, a first switch, a second switch and a switch power supply, wherein an output end of the photovoltaic battery pack is connected with a first end of the current transformer unit through the first switch; a second end of the current transformer unit is connected with a power grid through the second switch; the switch power supply is provided with a direct current taking branch and an alternate current taking branch; a current taking point of the direct current taking branch is located between the photovoltaic battery pack and the first switch; the current taking point of the alternate current taking branch is located between the second switch and the power grid. The photovoltaic system provided by the invention is capable of reducing the standby loss of the system, increasing the safety and reliability of the system and guaranteeing the service life of the photovoltaic battery pack.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a photovoltaic system and a control method thereof. Background technique [0002] In the traditional sense of the photovoltaic air conditioner, its photovoltaic system is often designed based on the traditional inverter, and its switching power supply directly takes power from the DC bus of the converter. When the air conditioner is not turned on and the photovoltaic cell module does not meet the power generation conditions (that is, no energy output), in order to ensure the detection function of the system, the DC bus must still be charged (high voltage or mains), and the converter must always operate to Keep the DC bus voltage stable at a fixed value. [0003] This kind of photovoltaic system has at least the following defects: when the air conditioner is in standby, the power consumption of the whole system is large, causing unnecessary waste of electric energy; In the...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/381H02J2300/24Y02E10/56
Inventor 娄贺伟刘克勤李建华张雪芬
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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