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Self-adaptive photovoltaic power supply system, control method thereof and air conditioning unit

A technology for power supply system and air conditioning unit, applied in photovoltaic power generation, heating and ventilation control system, heating and ventilation safety system, etc., can solve problems such as power loss, relieve heat dissipation pressure, improve photovoltaic power consumption efficiency, and improve heat dissipation effect Effect

Pending Publication Date: 2021-04-02
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an adaptive photovoltaic power supply system and its control method, and an air-conditioning unit, so as to at least solve the problem of power loss in the photovoltaic air-conditioning system in the prior art when the DC / DC converter is always running when the photovoltaic power is connected.

Method used

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  • Self-adaptive photovoltaic power supply system, control method thereof and air conditioning unit
  • Self-adaptive photovoltaic power supply system, control method thereof and air conditioning unit
  • Self-adaptive photovoltaic power supply system, control method thereof and air conditioning unit

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Embodiment 1

[0027] In preferred embodiment 1 of the present invention, a photovoltaic power supply system is provided, specifically, figure 1 A schematic diagram showing an optional structure of the system, such as figure 1 As shown, the system includes:

[0028] Photovoltaic panel 1;

[0029] DC bus 2;

[0030] A DC / DC converter 3, one end is connected to the photovoltaic panel 1, and the other end is connected to the DC bus 2;

[0031] The switch assembly 4 is set in parallel with the DC / DC converter 3, one end is connected to the photovoltaic cell panel 1, and the other end is connected to the DC bus 2, and is used to control the grid-connected mode of the photovoltaic cell panel 1; where the switch assembly 4 is disconnected When it is on, the photovoltaic cell panel 1 is connected to the DC bus 2 through the DC / DC converter 3 ; when the switch assembly 4 is closed, the photovoltaic cell panel 1 is directly connected to the DC bus 2 .

[0032] In the above embodiments, a photovolt...

Embodiment 2

[0039] In the preferred embodiment 2 of the present invention, a photovoltaic power supply system control method is provided, which is applied to the photovoltaic power supply system in the above-mentioned embodiment 1. Specifically, figure 2 An alternative flowchart showing the method, such as figure 2 As shown, the method includes the following steps S202-S206:

[0040] S202: Detect the operating state of the energy storage system and the output voltage of the photovoltaic panel;

[0041] S204: Determine the grid-connected form of the photovoltaic panel according to the operating state of the energy storage system and the output voltage of the photovoltaic panel;

[0042] S206: Control the operation of the switch assembly and the DC / DC converter according to the grid-connected form.

[0043] In the above embodiments, a photovoltaic power supply system that realizes self-adaptive working modes is proposed. The switch assembly is set in parallel with the DC / DC converter t...

Embodiment 3

[0065] Based on the photovoltaic power supply system provided in the above-mentioned embodiment 1, an air-conditioning unit is also provided in preferred embodiment 3 of the present invention. The air-conditioning unit is a photovoltaic air-conditioning unit, including the above-mentioned photovoltaic power supply system. The machine is powered by a DC bus.

[0066] In the above embodiments, a photovoltaic power supply system that realizes self-adaptive working modes is proposed. The switch assembly is set in parallel with the DC / DC converter to control the grid-connected mode of the photovoltaic panel. When the switch assembly is disconnected, the photovoltaic The solar panel is connected to the DC bus through the DC / DC converter. When the switch assembly is closed, the photovoltaic panel is directly connected to the DC bus. The above-mentioned method can solve the problem of power loss in the existing photovoltaic air-conditioning system when the DC / DC converter is always bo...

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Abstract

The invention discloses a self-adaptive photovoltaic power supply system, a control method thereof and an air conditioning unit. The system comprises: a photovoltaic cell panel; a DC bus; a DC / DC converter, wherein one end of the DC / DC converter is connected with the photovoltaic cell panel, and the other end is connected with the DC bus; and a switch assembly which is connected with the DC / DC converter in parallel, wherein one end of the switch assembly is connected with the photovoltaic cell panel, and the other end of the switch assembly is connected with the direct-current bus for controlling the grid-connected mode of the photovoltaic cell panel. When the switch assembly is disconnected, the photovoltaic cell panel is connected to the DC bus through the DC / DC converter; and when the switch assembly is closed, the photovoltaic cell panel is directly connected to the DC bus. The invention solves the problem of power loss due to the fact that the DC / DC converter always operates whenphotovoltaic power is accessed in a photovoltaic air conditioning system in the prior art, the photovoltaic power utilization efficiency is improved, and the heat dissipation effect of the system is improved.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to an adaptive photovoltaic power supply system, a control method thereof, and an air conditioner unit. Background technique [0002] In the existing photovoltaic (energy storage) air-conditioning system, the voltage of photovoltaic cells is connected to the high-voltage DC bus through a DC / DC converter. voltage to the set DC bus voltage. Moreover, when photovoltaic power is generated, the DC / DC converter is always running, and there is power loss, which puts pressure on the heat dissipation of the system. Moreover, the DC / DC converter can only realize the boost function, which boosts the output voltage of the connected photovoltaic panels to the set DC bus voltage. In order to maintain the stability of the bus voltage, it is required that the open circuit voltage of the connected photovoltaic panels should not be high Due to the DC bus voltage, the number of connected photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/28F24F11/88
CPCH02J3/381H02J3/28F24F11/88H02J2300/24Y02E10/56Y02E70/30H02J1/10F24F5/0046F24F2005/0067
Inventor 陈宁宁俞贤桥王京黄猛党培育
Owner GREE ELECTRIC APPLIANCES INC
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