CN-121356022-B - Photovoltaic device control method and device, photovoltaic device and storage medium

CN121356022BCN 121356022 BCN121356022 BCN 121356022BCN-121356022-B

Abstract

The embodiment of the invention relates to a photovoltaic device control method, a device, a photovoltaic device and a storage medium, wherein photovoltaic power generation capacity and load demand electric quantity of the photovoltaic device in a future time period are predicted according to historical use information and environment information of the photovoltaic device, a power supply strategy and a cold accumulation strategy of the photovoltaic device are determined according to the photovoltaic power generation capacity and the load demand electric quantity, the photovoltaic device is controlled to supply power according to the power supply strategy, and cold accumulation of the photovoltaic device is controlled according to the cold accumulation strategy. Therefore, under the condition that the photovoltaic equipment is an energy-saving air conditioner, photovoltaic fluctuation can be dynamically responded by predicting photovoltaic power generation capacity and load demand power quantity, matching corresponding power supply strategies and cold accumulation strategies and executing control, efficient conversion and storage of redundant electric energy to cold energy are realized, the energy utilization rate of the energy-saving air conditioner is effectively improved, and the problem of redundant electric energy consumption is solved.

Inventors

Teng tianfeng
SHEN CHUANTAO
JIN MENGMENG
ZHU FENGQI
LIU JINGJING

Assignees

珠海格力节能环保制冷技术研究中心有限公司

Dates

Publication Date: 20260508
Application Date: 20251218

Claims (8)

1. A photovoltaic device control method, characterized by comprising: According to the historical use information and the environmental information of the photovoltaic equipment, predicting photovoltaic power generation capacity and load demand power of the photovoltaic equipment in a future time period; determining a power supply strategy and a cold accumulation strategy of the photovoltaic equipment according to the photovoltaic power generation amount and the load demand power; Controlling the photovoltaic equipment to supply power according to the power supply strategy, and controlling the photovoltaic equipment to store cold according to the cold storage strategy; The determining the power supply strategy of the photovoltaic equipment according to the photovoltaic power generation amount and the load demand power comprises the following steps: When the photovoltaic generating capacity is smaller than the load demand electric quantity, judging whether the commercial power supply cost is larger than the cold accumulation energy storage power supply cost or not; If the utility power supply cost is greater than the cold accumulation energy storage power supply cost, determining the power supply strategy as photovoltaic power supply and cold accumulation energy storage power supply, or if the utility power supply cost is less than the cold accumulation energy storage power supply cost, determining the power supply strategy as photovoltaic power supply and power supply by the utility power; The method further includes obtaining a current photovoltaic power generation amount of the photovoltaic device; when the current photovoltaic power generation amount is larger than a first threshold value, controlling the photovoltaic equipment to store cold by using a first phase change material; When the current photovoltaic power generation amount is smaller than a second threshold value, controlling the photovoltaic equipment to store cold by using a second phase change material, wherein the phase change temperature of the first phase change material is smaller than that of the second phase change material, and the second threshold value is smaller than or equal to the first threshold value; the method further comprises the steps of integrating the photovoltaic air conditioning system with the electric vehicle charging system, preferentially charging the electric vehicle when the photovoltaic power supply is sufficient, and simultaneously performing cold accumulation operation.
2. The method of claim 1, wherein predicting photovoltaic power generation and load demand of the photovoltaic device over a future time period based on historical usage information and environmental information of the photovoltaic device comprises: Acquiring historical photovoltaic power supply data and a historical load curve of the photovoltaic equipment in a historical time period as the historical use information; acquiring weather information in a future time period as the environment information; And inputting the historical use information and the environmental information into a trained prediction model so as to output the photovoltaic power generation amount and the load demand power through the prediction model.
3. The method of claim 1, wherein the determining a power supply strategy and a cold storage strategy for the photovoltaic device from the photovoltaic power generation and the load demand power comprises: When the photovoltaic power generation amount is larger than or equal to the load demand power amount, determining the power supply strategy to be that photovoltaic power is supplied; judging whether grid connection limitation exists in the photovoltaic equipment or not; If no grid connection limitation exists and the commercial power supply cost is greater than the cold accumulation energy storage power supply cost, determining the cold accumulation strategy, namely, carrying out grid connection on the residual electric quantity after photovoltaic power supply, or if no grid connection limitation exists and the commercial power supply cost is less than the cold accumulation energy storage power supply cost, determining the cold accumulation strategy, namely, carrying out cold accumulation energy storage on the residual electric quantity after photovoltaic power supply; And if grid connection limitation exists, determining the cold accumulation strategy to perform cold accumulation and energy accumulation on the residual electric quantity after photovoltaic power supply.
4. A method according to claim 3, characterized in that the method further comprises: when the photovoltaic power generation amount of the first time period is predicted to be larger than the load demand power amount, when a second time period arrives, controlling the power utilization ratio of the photovoltaic equipment to use cold accumulation energy storage to be increased, and controlling the power utilization ratio of the photovoltaic equipment to use a power grid to be reduced, wherein the second time period is before the first time period.
5. The method according to claim 1, wherein the method further comprises: when the photovoltaic equipment is applied to a scene with low-temperature requirements, an ice cold storage mode is adopted for cold storage and energy storage; when the photovoltaic equipment is applied to a scene requiring normal temperature, a water cold accumulation mode is adopted to accumulate cold and store energy.
6. A photovoltaic device control apparatus, comprising: The prediction module is used for predicting photovoltaic power generation capacity and load demand power of the photovoltaic equipment in a future time period according to the historical use information and the environmental information of the photovoltaic equipment; The determining module is used for determining a power supply strategy and a cold accumulation strategy of the photovoltaic equipment according to the photovoltaic power generation amount and the load demand power; The control module is used for controlling the photovoltaic equipment to supply power according to the power supply strategy and controlling the photovoltaic equipment to store cold according to the cold storage strategy; The determining module is specifically configured to determine whether a commercial power supply cost is greater than a cold accumulation energy storage power supply cost when the photovoltaic power generation amount is less than the load demand power amount; If the utility power supply cost is greater than the cold accumulation energy storage power supply cost, determining the power supply strategy as photovoltaic power supply and cold accumulation energy storage power supply, or if the utility power supply cost is less than the cold accumulation energy storage power supply cost, determining the power supply strategy as photovoltaic power supply and power supply by the utility power; The control module is also used for acquiring the current photovoltaic power generation amount of the photovoltaic equipment; when the current photovoltaic power generation amount is larger than a first threshold value, controlling the photovoltaic equipment to store cold by using a first phase change material; When the current photovoltaic power generation amount is smaller than a second threshold value, controlling the photovoltaic equipment to store cold by using a second phase change material, wherein the phase change temperature of the first phase change material is smaller than that of the second phase change material, and the second threshold value is smaller than or equal to the first threshold value; the photovoltaic air conditioning system is integrated with the electric vehicle charging system, when the photovoltaic power supply is sufficient, the electric vehicle is charged preferentially, and the cold accumulation operation is performed simultaneously.
7. The photovoltaic device is characterized by comprising a processor and a memory, wherein the processor is used for executing a photovoltaic device control program stored in the memory to realize the photovoltaic device control method according to any one of claims 1-5.
8. A storage medium storing one or more programs executable by one or more processors to implement the photovoltaic device control method of any one of claims 1-5.

Description

Photovoltaic device control method and device, photovoltaic device and storage medium Technical Field The embodiment of the invention relates to the technical field of photovoltaic systems, in particular to a photovoltaic equipment control method and device, photovoltaic equipment and a storage medium. Background With the wide application of renewable energy sources, photovoltaic power generation is an important form of clean energy source and is increasingly popular in building energy systems. However, the photovoltaic power generation has obvious fluctuation and intermittence, the output power of the photovoltaic power generation is greatly influenced by factors such as illumination intensity, weather conditions and the like, and when the generated energy of the photovoltaic system exceeds the real-time load demand, if the excessive electric energy cannot be effectively consumed, the energy waste is caused, and the problem is more remarkable especially in the scene of grid connection limitation or insufficient energy storage capacity. At present, the conventional photovoltaic air conditioning system mostly adopts a direct power supply or simple energy storage mode, lacks an effective response mechanism for the fluctuation of photovoltaic power generation, is difficult to adjust the load in time in a strong illumination period, and causes that a large amount of photovoltaic power is abandoned. Meanwhile, the existing system lacks flexibility in cold storage mode selection, has low cold energy storage efficiency, cannot be combined with practical application scene optimization design, further aggravates energy waste, and enables the overall energy utilization rate to be at a low level. Based on the above, the low energy utilization rate of the photovoltaic air conditioning system under the photovoltaic power generation fluctuation condition becomes a problem to be solved urgently. Disclosure of Invention In view of the above, in order to solve the above technical problems or some of the technical problems, embodiments of the present invention provide a photovoltaic device control method, apparatus, photovoltaic device, and storage medium. In a first aspect, an embodiment of the present invention provides a photovoltaic device control method, including: According to the historical use information and the environmental information of the photovoltaic equipment, predicting photovoltaic power generation capacity and load demand power of the photovoltaic equipment in a future time period; determining a power supply strategy and a cold accumulation strategy of the photovoltaic equipment according to the photovoltaic power generation amount and the load demand power; and controlling the photovoltaic equipment to supply power according to the power supply strategy, and controlling the photovoltaic equipment to store cold according to the cold storage strategy. In one possible implementation manner, the predicting the photovoltaic power generation capacity and the load demand power of the photovoltaic device in the future period according to the historical usage information and the environmental information of the photovoltaic device includes: Acquiring historical photovoltaic power supply data and a historical load curve of the photovoltaic equipment in a historical time period as the historical use information; acquiring weather information in a future time period as the environment information; And inputting the historical use information and the environmental information into a trained prediction model so as to output the photovoltaic power generation amount and the load demand power through the prediction model. In one possible embodiment, the determining the power supply strategy of the photovoltaic device according to the photovoltaic power generation amount and the load demand power amount includes: When the photovoltaic generating capacity is smaller than the load demand electric quantity, judging whether the commercial power supply cost is larger than the cold accumulation energy storage power supply cost or not; And if the commercial power supply cost is greater than the cold accumulation energy storage power supply cost, determining the power supply strategy to be the photovoltaic power supply and the cold accumulation energy storage power supply, or if the commercial power supply cost is less than the cold accumulation energy storage power supply cost, determining the power supply strategy to be the photovoltaic power supply and the commercial power supply. In one possible embodiment, the determining the power supply strategy and the cold storage strategy of the photovoltaic device according to the photovoltaic power generation amount and the load demand power amount includes: When the photovoltaic power generation amount is larger than or equal to the load demand power amount, determining the power supply strategy to be that photovoltaic power is supplied; judging whether grid connection limitation exi