CN-121977254-A - Photovoltaic air conditioner operation control method and device, photovoltaic air conditioner and storage medium

CN121977254ACN 121977254 ACN121977254 ACN 121977254ACN-121977254-A

Abstract

The application relates to a photovoltaic air conditioner operation control method and device, a photovoltaic air conditioner and a storage medium, wherein the method comprises the following steps: and acquiring the bus voltage or the photovoltaic voltage of the photovoltaic module, determining a first voltage range in which the bus voltage is positioned or a second voltage range in which the photovoltaic voltage is positioned, and controlling the photovoltaic air conditioner to operate according to the first voltage range or the second voltage range. Therefore, the operation of the photovoltaic air conditioner is controlled based on the first voltage range where the bus voltage is or the second voltage range where the photovoltaic voltage is, and the efficient cooperative control of the photovoltaic and the air conditioner under the condition of no energy storage can be realized.

Inventors

LAI FENG
HUANG MENG
CHEN NINGNING
HUANG SONGRU

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260505
Application Date: 20251229

Claims (15)

1. A photovoltaic air conditioner operation control method, characterized in that the method comprises: Acquiring bus voltage or photovoltaic voltage of a photovoltaic module; Determining a first voltage range in which the bus voltage is located or a second voltage range in which the photovoltaic voltage is located; And controlling the photovoltaic air conditioner to operate according to the first voltage range or the second voltage range.
2. The method of claim 1, further comprising, prior to performing the method: closing the first contactor and the second contactor to supply power to the photovoltaic air conditioner, and detecting whether a voltage difference value between the photovoltaic voltage of the photovoltaic assembly and the bus voltage is within a preset error range; When the voltage difference between the photovoltaic voltage of the photovoltaic module and the bus voltage is within a preset error range, the photovoltaic air conditioner is allowed to start; Receiving a starting command of a photovoltaic air conditioner, starting an inner fan and an outer fan of the photovoltaic air conditioner in response to the starting command, and stabilizing bus voltage to a preset voltage by photovoltaic DC/DC; after the first time period is preset, when the photovoltaic voltage and the bus voltage of the photovoltaic assembly are kept normal, starting a compressor of the photovoltaic air conditioner.
3. The method of claim 1, wherein controlling photovoltaic air conditioning operation according to the first voltage range or the second voltage range comprises: and controlling the compressor of the photovoltaic air conditioner to boost under the condition that the first voltage range is a first power-sufficient boost frequency range or the second voltage range is a second power-sufficient boost frequency range.
4. The method of claim 3, wherein controlling the compressor boost of the photovoltaic air conditioner comprises: Acquiring the current operating frequency of a compressor of a photovoltaic air conditioner, and determining an ascending frequency step length according to the current operating frequency; And controlling the compressor of the photovoltaic air conditioner to raise the frequency according to the raising frequency step length.
5. The method of claim 1, wherein controlling photovoltaic air conditioning operation according to the first voltage range or the second voltage range comprises: and under the condition that the first voltage range is a first critical frequency stabilization waiting range or the second voltage range is a second critical frequency stabilization waiting range, maintaining the current running frequency of the compressor of the photovoltaic air conditioner.
6. The method of claim 5, further comprising, after maintaining the current operating frequency of the compressor of the photovoltaic air conditioner: after a second time period is preset, acquiring new bus voltage or new photovoltaic voltage of the photovoltaic module; determining a new first voltage range in which the new bus voltage is located or a new second voltage range in which the new photovoltaic voltage is located; Controlling the compressor of the photovoltaic air conditioner to raise the frequency under the condition that the new first voltage range is a first power-sufficient frequency raising range or the new second voltage range is a second power-sufficient frequency raising range; and continuously maintaining the current running frequency of the compressor of the photovoltaic air conditioner under the condition that the new first voltage range is a first critical frequency stabilization waiting range or the new second voltage range is a second critical frequency stabilization waiting range.
7. The method of claim 1, wherein controlling photovoltaic air conditioning operation according to the first voltage range or the second voltage range comprises: And controlling the compressor of the photovoltaic air conditioner to perform frequency reduction under the condition that the first voltage range is a first power shortage frequency reduction range or the second voltage range is a second power shortage frequency reduction range.
8. The method of claim 7, wherein controlling compressor down-conversion of a photovoltaic air conditioner comprises: acquiring a preset frequency-reducing step length, and controlling the frequency reduction of a compressor of the photovoltaic air conditioner according to the preset frequency-reducing step length; Or alternatively Determining a power/frequency coefficient between the input power and the operating frequency of a compressor of the photovoltaic air conditioner; determining the minimum photovoltaic power surplus required by the bus voltage to rise from the down-conversion trigger voltage to the critical frequency stabilization voltage; determining theoretical frequency amplitude reduction of a compressor of the photovoltaic air conditioner according to the power/frequency coefficient and the minimum photovoltaic power surplus; acquiring a preset frequency-reducing duration, and determining a theoretical frequency-reducing step length according to the preset frequency-reducing duration and the theoretical frequency-reducing amplitude; And controlling the compressor of the photovoltaic air conditioner to perform frequency reduction according to the theoretical frequency reduction step length.
9. The method of claim 8, wherein determining a theoretical frequency reduction of a compressor of a photovoltaic air conditioner based on the power/frequency coefficient and the minimum photovoltaic power surplus comprises: Dividing the minimum photovoltaic power surplus by the power/frequency coefficient to obtain theoretical frequency amplitude reduction of a compressor of the photovoltaic air conditioner; The determining a theoretical frequency-reducing step length according to the preset frequency-reducing duration and the theoretical frequency-reducing amplitude comprises the following steps: obtaining preset redundant frequency amplitude reduction, and adding the theoretical frequency amplitude reduction and the preset redundant frequency amplitude reduction to obtain corrected frequency amplitude reduction; dividing the correction frequency amplitude reduction by the preset frequency reduction time length to obtain a theoretical frequency reduction step length; the step of controlling the compressor of the photovoltaic air conditioner to reduce the frequency according to the theoretical step of reducing the frequency comprises the following steps: Acquiring a preset redundancy frequency-reducing step length, and adding the preset redundancy frequency-reducing step length and the theoretical frequency-reducing step length to obtain a corrected frequency-reducing step length; and controlling the compressor of the photovoltaic air conditioner to perform frequency reduction according to the corrected frequency reduction step length.
10. The method according to any one of claims 7 to 9, wherein after the controlling the compressor of the photovoltaic air conditioner to reduce the frequency, further comprising: acquiring new bus voltage or new photovoltaic voltage of a photovoltaic module; determining a new first voltage range in which the new bus voltage is located or a new second voltage range in which the new photovoltaic voltage is located; And under the condition that the new first voltage range is a first critical frequency stabilization waiting range or the new second voltage range is a second critical frequency stabilization waiting range, executing the following operations: After the third duration is preset, the step of obtaining the new bus voltage or the new photovoltaic voltage of the photovoltaic module is skipped to detect whether the frequency raising condition is met.
11. The method of claim 1, wherein controlling photovoltaic air conditioning operation according to the first voltage range or the second voltage range comprises: Controlling a compressor of the photovoltaic air conditioner to stop running under the condition that the first voltage range is a first under-voltage protection range or the second voltage range is a second under-voltage protection range; And when the photovoltaic voltage of the photovoltaic assembly reaches the preset photovoltaic voltage, controlling the compressor of the photovoltaic air conditioner to run again.
12. The method of claim 2, wherein controlling photovoltaic air conditioning operation according to the first voltage range or the second voltage range comprises: controlling the photovoltaic air conditioner to stop running under the condition that the first voltage range is a first limit under-voltage protection range or the second voltage range is a second limit under-voltage protection range; After the fourth time period is preset, the step of detecting whether the voltage difference value between the photovoltaic voltage of the photovoltaic module and the bus voltage is within a preset error range is performed.
13. A photovoltaic air conditioner operation control device, the device comprising: the voltage acquisition module is used for acquiring bus voltage or photovoltaic voltage of the photovoltaic module; The range determining module is used for determining a first voltage range in which the bus voltage is located or a second voltage range in which the photovoltaic voltage is located; and the operation control module is used for controlling the photovoltaic air conditioner to operate according to the first voltage range or the second voltage range.
14. The photovoltaic air conditioner is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus; a memory for storing a computer program; a processor for implementing the method of any one of claims 1-12 when executing a program stored on a memory.
15. A storage medium having stored thereon a computer program, which when executed by a processor, implements the method of any of claims 1-12.

Description

Photovoltaic air conditioner operation control method and device, photovoltaic air conditioner and storage medium Technical Field The application relates to the technical field of intelligent home, in particular to a photovoltaic air conditioner operation control method and device, a photovoltaic air conditioner and a storage medium. Background The photovoltaic air conditioner without the storage off-grid is used as an important application form of renewable energy sources in an off-grid scene, an energy storage device is not configured in the system, the power generation output of the photovoltaic module is required to be directly supplied to loads of an internal unit and an external unit of the air conditioner, and the power generation capacity of the photovoltaic module directly determines the power supply capacity to the loads. The photovoltaic power generation is influenced by factors such as illumination intensity, ambient temperature and the like, so that the photovoltaic power generation has obvious randomness and uncertainty. When the air conditioner is driven to run by means of photovoltaic power generation, the condition that photovoltaic power generation power cannot meet the running requirement of the air conditioner easily occurs in the morning, evening and other periods when illumination is weak, so that the air conditioner is frequently stopped and started, the use experience of a user is seriously affected, the service life of the whole air conditioner is shortened, meanwhile, instantaneous power impact generated in the starting and stopping process of the air conditioner is easy to cause voltage fluctuation of a bus of a system and even power failure, and the running reliability of the system is greatly reduced. The problems limit popularization and application of the photovoltaic air conditioner without the off-grid storage, so that efficient cooperative control of the photovoltaic air conditioner and the air conditioner is realized under the condition of no energy storage, and the photovoltaic air conditioner becomes a key technical problem for promoting large-scale application of renewable energy sources in an off-grid scene, and a corresponding solution is needed to be provided. Disclosure of Invention In order to solve the technical problem of realizing efficient cooperative control of photovoltaic and air conditioner under the condition of no energy storage, the application provides a photovoltaic air conditioner operation control method and device, a photovoltaic air conditioner and a storage medium. The specific technical scheme is as follows: In a first aspect, the present application provides a photovoltaic air conditioner operation control method, the method comprising: Acquiring bus voltage or photovoltaic voltage of a photovoltaic module; Determining a first voltage range in which the bus voltage is located or a second voltage range in which the photovoltaic voltage is located; And controlling the photovoltaic air conditioner to operate according to the first voltage range or the second voltage range. In an alternative embodiment, before performing the method, the method further comprises: closing the first contactor and the second contactor to supply power to the photovoltaic air conditioner, and detecting whether a voltage difference value between the photovoltaic voltage of the photovoltaic assembly and the bus voltage is within a preset error range; When the voltage difference between the photovoltaic voltage of the photovoltaic module and the bus voltage is within a preset error range, the photovoltaic air conditioner is allowed to start; Receiving a starting command of a photovoltaic air conditioner, starting an inner fan and an outer fan of the photovoltaic air conditioner in response to the starting command, and stabilizing bus voltage to a preset voltage by photovoltaic DC/DC; after the first time period is preset, when the photovoltaic voltage and the bus voltage of the photovoltaic assembly are kept normal, starting a compressor of the photovoltaic air conditioner. In an alternative embodiment, the controlling the photovoltaic air conditioner to operate according to the first voltage range or the second voltage range includes: and controlling the compressor of the photovoltaic air conditioner to boost under the condition that the first voltage range is a first power-sufficient boost frequency range or the second voltage range is a second power-sufficient boost frequency range. In an alternative embodiment, the controlling the compressor of the photovoltaic air conditioner to increase the frequency includes: Acquiring the current operating frequency of a compressor of a photovoltaic air conditioner, and determining an ascending frequency step length according to the current operating frequency; And controlling the compressor of the photovoltaic air conditioner to raise the frequency according to the raising frequency step length. In an alternative embodiment, the con