CN116915150A - Load service condition heat dissipation method based on photovoltaic power generation system - Google Patents

Load service condition heat dissipation method based on photovoltaic power generation system Download PDF

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Publication number
CN116915150A
CN116915150A CN202211251347.4A CN202211251347A CN116915150A CN 116915150 A CN116915150 A CN 116915150A CN 202211251347 A CN202211251347 A CN 202211251347A CN 116915150 A CN116915150 A CN 116915150A
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power generation
photovoltaic power
generation system
generation panel
state
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Inventor
仲隽伟
李小峰
徐海杰
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Shanghai Yingtong Electric Co ltd
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Shanghai Yingtong Electric Co ltd
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Priority to CN202211251347.4A priority Critical patent/CN116915150A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
    • H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/10—Control of position or direction without using feedback
    • G05D3/105—Solar tracker
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/38—Energy storage means, e.g. batteries, structurally associated with PV modules
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40—Thermal components
    • H02S40/42—Cooling means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention provides a heat dissipation method based on the load service condition of a photovoltaic power generation system, which is characterized in that the attitude orientation of a panel of each photovoltaic power generation panel is adjusted according to the solar illumination information of an area where the photovoltaic power generation system is positioned, so that the photovoltaic power generation panel can receive solar illumination to the maximum extent to realize efficient photovoltaic power generation; meanwhile, the state information of the electric quantity of the storage battery connected with each photovoltaic power generation panel and the power supply parameter information of the storage battery to an external load are also obtained, and the power transmission state of the photovoltaic power generation panel to the storage battery and/or the power supply state of the storage battery to the external load are adjusted so as to ensure the stable and continuous operation of the photovoltaic power generation system; and controlling the cold air injection equipment to radiate the photovoltaic power generation system according to the real-time working state information of the external load and the environment temperature of the area, and controlling the radiating fan to radiate the photovoltaic power generation system according to the on-off state and the working temperature of the photovoltaic power generation panel so as to radiate the photovoltaic power generation system in time.

Description

Load service condition heat dissipation method based on photovoltaic power generation system
Technical Field
The invention relates to the technical field of photovoltaic power generation system control, in particular to a heat dissipation method based on the load service condition of a photovoltaic power generation system.
Background
The photovoltaic power generation field comprises a panel array formed by a plurality of photovoltaic power generation panels, all the photovoltaic power generation panels in the panel array jointly perform photovoltaic power generation, the storage battery is charged, and the storage battery supplies power to an external load, so that normal operation of the external load is guaranteed. All photovoltaic power generation area arrays of the panel array can generate heat during operation, and in order to timely disperse the heat generated by the photovoltaic power generation panel, a cooling fan is arranged on the photovoltaic power generation panel to cool and dissipate the heat through air. The cooling fans in the prior art all operate with fixed power, and all photovoltaic power generation panels are always in an on state, so that the photovoltaic power generation panels can be in an overload working state, and the overall normal work of a photovoltaic power generation field is affected, and the working stability of external loads is reduced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a heat dissipation method based on the load service condition of a photovoltaic power generation system, which adjusts the panel gesture orientation of each photovoltaic power generation panel according to the solar illumination information of the area where the photovoltaic power generation system is positioned, so as to ensure that the photovoltaic power generation panel can receive solar illumination to the maximum extent to realize efficient photovoltaic power generation; meanwhile, the state information of the electric quantity of the storage battery connected with each photovoltaic power generation panel and the power supply parameter information of the storage battery to an external load are also acquired, and the power transmission state of the storage battery by the photovoltaic power generation panel and/or the power supply state of the external load by the storage battery are adjusted, so that the overall work load of the photovoltaic power generation system can be adjusted, and the stable and continuous work of the photovoltaic power generation system is ensured; and then according to the real-time working state information of an external load and the environmental temperature of the area where the external load is positioned, the cold air injection equipment is controlled to radiate the photovoltaic power generation system, and according to the on-off state and the working temperature of the photovoltaic power generation panel, the radiating fan is controlled to radiate the photovoltaic power generation system, so that the photovoltaic power generation system radiates in time, and the whole normal work of the photovoltaic power generation system is ensured.
The invention provides a heat dissipation method based on the load service condition of a photovoltaic power generation system, which comprises the following steps:
step S1, collecting solar illumination information of an area where a photovoltaic power generation system is located, and determining a real-time solar illumination state of each photovoltaic power generation panel included in the photovoltaic power generation system; according to the real-time solar illumination state, adjusting the panel posture orientation of each photovoltaic power generation panel;
step S2, acquiring the state information of the electric quantity of the storage battery and the power supply parameter information of the external load, which are connected with each photovoltaic power generation panel, so as to adjust the power transmission state of the photovoltaic power generation panel to the storage battery and/or the power supply state of the storage battery to the external load;
step S3, acquiring real-time working state information of an external load connected with the photovoltaic power generation system and the environment temperature of an area where the photovoltaic power generation system is located, so as to control the cold air injection equipment to radiate heat of the photovoltaic power generation system; acquiring the switching state of a photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel, so as to control the cooling fan to cool the photovoltaic power generation system;
further, in the step S1, collecting solar illumination information of an area where the photovoltaic power generation system is located, and determining a real-time solar illumination state of each photovoltaic power generation panel included in the photovoltaic power generation system specifically includes:
collecting a sunlight height angle of an area where a photovoltaic power generation system is located; calibrating the sunlight height angle according to the geographic coordinates of all photovoltaic power generation panels of the photovoltaic power generation system in the region, so as to determine the real-time sunlight height angle of each photovoltaic power generation panel;
further, in the step S1, adjusting the panel posture orientation of each photovoltaic power generation panel according to the real-time solar illumination state specifically includes:
according to the real-time sunlight height angle, the pitch angle of the light receiving surface of each photovoltaic power generation panel is adjusted, so that the light receiving surface of each photovoltaic power generation panel is always perpendicular to the propagation direction of sunlight;
further, in the step S2, the obtaining of the state information of the electric quantity of the storage battery itself connected to each photovoltaic power generation panel and the power supply parameter information to the external load specifically includes:
acquiring a residual electric quantity value of a storage battery connected with each photovoltaic power generation panel, and supplying power voltage and electric energy transmission rate of the storage battery for supplying power to an external load;
further, in the step S2, adjusting the power transmission state of the photovoltaic power generation panel to the storage battery and/or the power supply state of the storage battery to the external load specifically includes:
comparing the residual electric quantity value of the storage battery with a preset electric quantity threshold value, and if the residual electric quantity value is smaller than or equal to the preset electric quantity threshold value, indicating that the current storage battery stops supplying power to an external load, indicating that other storage batteries are switched to supply power to the external load, and/or indicating that the photovoltaic power generation panel increases the charging power of the current storage battery;
or alternatively, the process may be performed,
comparing the power supply voltage of the storage battery for supplying power to the external load with a preset voltage threshold, and if the power supply voltage is smaller than the preset voltage threshold, indicating that the current storage battery and at least one other storage battery are used for supplying power to the external load in series;
or alternatively, the process may be performed,
comparing the power transmission rate of the power supplied by the external storage battery load with a preset power transmission rate threshold, and if the power transmission rate is smaller than the preset power transmission rate threshold, indicating that the current storage battery and at least one other storage battery are used for supplying power to the external load in series;
further, in the step S3, acquiring real-time working state information of an external load connected to the photovoltaic power generation system and an ambient temperature of an area where the photovoltaic power generation system is located, so as to control the cold air injection device to radiate heat of the photovoltaic power generation system specifically includes:
acquiring real-time working voltage and real-time working current of an external load connected with the photovoltaic power generation system and the ambient temperature of an area where the photovoltaic power generation system is located, so as to determine the temperature of cold air sprayed by the cold air spraying equipment, and further radiate heat of the photovoltaic power generation system;
in the step S3, the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel are obtained, so that the control of the cooling fan to cool the photovoltaic power generation system specifically includes:
acquiring the working state of a photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel, so as to determine the rotating speed of the cooling fan, and further cool the photovoltaic power generation system;
further, in the step S3, after the cooling air injection device and the cooling fan are controlled to dissipate heat of the photovoltaic power generation system, the method further includes switching the on/off state of the photovoltaic power generation panel according to the on/off state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated working time of the photovoltaic power generation panel, so as to realize switching power supply to an external load;
further, in the step S3, the real-time working voltage and the real-time working current of the external load connected to the photovoltaic power generation system and the ambient temperature of the area where the photovoltaic power generation system is located are obtained, so as to determine the cold air temperature sprayed by the cold air spraying device, thereby dissipating heat of the photovoltaic power generation system specifically includes:
determining the cold air temperature sprayed by the cold air spraying device according to the real-time working voltage and the real-time working current of an external load connected with the photovoltaic power generation system and the ambient temperature of the area where the photovoltaic power generation system is positioned by using the following formula (1),
in the above formula (1), E (t) represents the temperature of the cold air injected by the cold air injection device at the current time; t represents the current time; q (Q) 0 Representing the ambient temperature at the current time; e (E) min Representing the lowest temperature which can be reached by the cold air sprayed by the cold air spraying equipment; u (U) 0 (t) represents the real-time operating voltage of the external load at the current moment; i 0 (t) represents the real-time operating current of the external load at the present moment; m represents the number of photovoltaic power generation panels included in each row in a photovoltaic power generation panel array of the photovoltaic power generation system; n represents the number of photovoltaic power generation panels included in each column in the photovoltaic power generation panel array of the photovoltaic power generation system; p (P) e Representing the highest output power value of a single photovoltaic power generation panel;
in the step S3, the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel are obtained, so as to determine the rotation speed of the cooling fan, thereby cooling the photovoltaic power generation system specifically includes:
the following formula (2) is utilized to determine the rotating speed of the cooling fan according to the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel,
in the above formula (2), ω [ t_ (i, j)]Indicating the rotation speed of a cooling fan arranged on a photovoltaic power generation panel of an ith row and a jth column in a photovoltaic power generation panel array of a photovoltaic power generation system at the current moment t, if omega [ t_ (i, j)]If the calculated value in the above formula (2) is less than 0, ω [ t_ (i, j) is directly calculated]The result of (2) is taken as 0; u [ t_ (i, j)]The output voltage value of a photovoltaic power generation panel of the ith row and the jth column in a photovoltaic power generation panel array of the photovoltaic power generation system at the current moment t is represented; f { } represents a positive number test function, when the value in the bracket is a positive number, the function value of the positive number test function is 1, and when the value in the bracket is not a positive number, the function value of the positive number test function is 0; omega max Indicating the maximum rotation speed of the cooling fan; t (i, j) represents the accumulated working time of the photovoltaic power generation panels of the ith row and the jth column in the photovoltaic power generation panel array of the photovoltaic power generation system at the current moment T; t is t 0 Indicating the starting working time of the photovoltaic power generation system; q [ t_ (i, j)]Photovoltaic power generation panel array for representing current time t photovoltaic power generation systemThe working temperature of the photovoltaic power generation panel of the ith row and the jth column;representing Q [ t_ (i, j) in the process of taking the value of i from 1 to n and taking the value of j from 1 to m]Is the maximum value of (2);
in the step S3, the switching state of the photovoltaic power generation panel is switched according to the switching state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated operating time of the photovoltaic power generation panel, so as to realize the switching power supply to the external load specifically includes:
determining a threshold value of the accumulated working time of the photovoltaic power generation panel corresponding to the switching of the photovoltaic power generation panel from the on state to the off state according to the on-off state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated working time of the photovoltaic power generation panel by using the following formula (3),
in the above formula (3), T 0 Indicating a threshold value of accumulated working time of the photovoltaic power generation panel corresponding to the switching of the photovoltaic power generation panel from the on state to the off state;representing the process of taking the value of i from 1 to n and taking the value of j from 1 to m, and satisfying F { u [ t_ (i, j)]When the condition of } ×T (i, j) noteq0, F { u [ t_ (i, j)]A minimum value of } ×t (i, j);
satisfying F { u [ t_ (i, j)]When the condition of } =0, the condition satisfying T (i, j) is selected from all photovoltaic power generation panels of the photovoltaic power generation system<T 0 And all photovoltaic power generation panels in an on state, and sequentially switching the corresponding photovoltaic power generation panels from the on state to the off state in the order of T (i, j) from large to small, and not satisfying T (i, j)<T 0 All photovoltaic power generation panels in the closed state are sequentially switched from the closed state to the open state according to the sequence from small to large of T (i, j), so that the external appearance is realizedThe partial load switches the power supply.
Compared with the prior art, the heat dissipation method based on the load service condition of the photovoltaic power generation system adjusts the panel posture orientation of each photovoltaic power generation panel according to the solar illumination information of the area where the photovoltaic power generation system is located, and ensures that the photovoltaic power generation panels can receive solar illumination to the maximum extent so as to realize efficient photovoltaic power generation; meanwhile, the state information of the electric quantity of the storage battery connected with each photovoltaic power generation panel and the power supply parameter information of the storage battery to an external load are also acquired, and the power transmission state of the storage battery by the photovoltaic power generation panel and/or the power supply state of the external load by the storage battery are adjusted, so that the overall work load of the photovoltaic power generation system can be adjusted, and the stable and continuous work of the photovoltaic power generation system is ensured; and then according to the real-time working state information of an external load and the environmental temperature of the area where the external load is positioned, the cold air injection equipment is controlled to radiate the photovoltaic power generation system, and according to the on-off state and the working temperature of the photovoltaic power generation panel, the radiating fan is controlled to radiate the photovoltaic power generation system, so that the photovoltaic power generation system radiates in time, and the whole normal work of the photovoltaic power generation system is ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a heat dissipation method based on the load use condition of a photovoltaic power generation system.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a flow chart of a heat dissipation method based on a load usage condition of a photovoltaic power generation system according to an embodiment of the present invention is shown. The heat dissipation method based on the load service condition of the photovoltaic power generation system comprises the following steps:
step S1, collecting solar illumination information of an area where a photovoltaic power generation system is located, and determining a real-time solar illumination state of each photovoltaic power generation panel included in the photovoltaic power generation system; according to the real-time solar illumination state, adjusting the panel posture orientation of each photovoltaic power generation panel;
step S2, acquiring the state information of the electric quantity of the storage battery and the power supply parameter information of the external load, which are connected with each photovoltaic power generation panel, so as to adjust the power transmission state of the photovoltaic power generation panel to the storage battery and/or the power supply state of the storage battery to the external load;
step S3, acquiring real-time working state information of an external load connected with the photovoltaic power generation system and the environment temperature of an area where the photovoltaic power generation system is located, so as to control the cold air injection equipment to radiate heat of the photovoltaic power generation system; the method comprises the steps of obtaining the switching state of a photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel, and controlling the cooling fan to cool the photovoltaic power generation system.
The beneficial effects of the technical scheme are as follows: according to the heat dissipation method based on the load service condition of the photovoltaic power generation system, the panel posture orientation of each photovoltaic power generation panel is adjusted according to the solar illumination information of the area where the photovoltaic power generation system is located, so that the photovoltaic power generation panel can receive solar illumination to the maximum extent to realize efficient photovoltaic power generation; meanwhile, the state information of the electric quantity of the storage battery connected with each photovoltaic power generation panel and the power supply parameter information of the storage battery to an external load are also acquired, and the power transmission state of the storage battery by the photovoltaic power generation panel and/or the power supply state of the external load by the storage battery are adjusted, so that the overall work load of the photovoltaic power generation system can be adjusted, and the stable and continuous work of the photovoltaic power generation system is ensured; and then according to the real-time working state information of an external load and the environmental temperature of the area where the external load is positioned, the cold air injection equipment is controlled to radiate the photovoltaic power generation system, and according to the on-off state and the working temperature of the photovoltaic power generation panel, the radiating fan is controlled to radiate the photovoltaic power generation system, so that the photovoltaic power generation system radiates in time, and the whole normal work of the photovoltaic power generation system is ensured.
Preferably, in the step S1, collecting solar illumination information of an area where the photovoltaic power generation system is located, and determining a real-time solar illumination state of each photovoltaic power generation panel included in the photovoltaic power generation system specifically includes:
collecting a sunlight height angle of an area where a photovoltaic power generation system is located; and calibrating the sunlight height angle according to the geographical coordinates of all photovoltaic power generation panels of the photovoltaic power generation system in the region, so as to determine the real-time sunlight height angle of each photovoltaic power generation panel.
The beneficial effects of the technical scheme are as follows: the photovoltaic power generation system comprises a plurality of photovoltaic power generation panels which are arranged in an array form, each photovoltaic power generation panel is connected with a storage battery, and the photovoltaic power generation panels generate photovoltaic reaction and generate electric energy after receiving illumination to charge the storage batteries; the storage battery is connected with an external load to supply power to the external load, so that the normal continuous operation of the external load is ensured. Each photovoltaic power generation panel of the photovoltaic power generation system is supported through a movable support, and the movable support can adjust the posture orientation of the photovoltaic power generation panel, so that the light receiving surface orientation of the photovoltaic power generation panel is matched with the sunlight height angle. The sunlight height angle of the region where the photovoltaic power generation system is located is collected, and the geographic coordinates of longitude and latitude of each photovoltaic power generation panel in the region are combined, so that the sunlight height angle is calibrated, the real-time sunlight height angle of each photovoltaic power generation panel is determined, and the accuracy of the pose orientation of each photovoltaic power generation panel is adjusted subsequently.
Preferably, in the step S1, adjusting the panel posture orientation of each photovoltaic power generation panel according to the real-time solar illumination state specifically includes:
according to the real-time sunlight height angle, the pitch angle of the light receiving surface of each photovoltaic power generation panel is adjusted, so that the light receiving surface of each photovoltaic power generation panel is always perpendicular to the propagation direction of sunlight.
The beneficial effects of the technical scheme are as follows: according to the real-time sunlight height angle, the movable support is instructed to rotate, and the pitch angle of the light receiving surface of the photovoltaic power generation panel is adjusted, so that the light receiving surface of each photovoltaic power generation panel is always perpendicular to the propagation direction of sunlight, and the photovoltaic power generation efficiency of the photovoltaic power generation panel is improved.
Preferably, in this step S2, acquiring the state information of the electric quantity of the storage battery itself connected to each photovoltaic power generation panel and the power supply parameter information to the external load specifically includes:
and acquiring the residual electric quantity value of the storage battery connected with each photovoltaic power generation panel, and the power supply voltage and the power transmission rate of the storage battery for supplying power to an external load.
The beneficial effects of the technical scheme are as follows: each photovoltaic power generation panel is provided with a storage battery, and the photovoltaic power generation panels transmit electric energy generated by photovoltaic reaction to the storage battery for charging. The residual electric quantity value of the storage battery, the power supply voltage and the power transmission rate of the storage battery for supplying power to an external load directly influence the power supply stability of the storage battery to the external load. The power transmission state of the photovoltaic power generation panel to the storage battery and the power supply state of the storage battery to the external load can be conveniently and pertinently adjusted by detecting the residual electric quantity value, the power supply voltage and the electric energy transmission rate, so that the normal transmission of electric energy among the photovoltaic power generation panel, the storage battery and the external load is ensured.
Preferably, in this step S2, adjusting the power transmission state of the photovoltaic power generation panel to the storage battery and/or the power supply state of the storage battery to the external load specifically includes:
comparing the residual electric quantity value of the storage battery with a preset electric quantity threshold value, and if the residual electric quantity value is smaller than or equal to the preset electric quantity threshold value, indicating that the current storage battery stops supplying power to an external load, indicating that other storage batteries are switched to supply power to the external load, and/or indicating that the photovoltaic power generation panel increases the charging power of the current storage battery;
or alternatively, the process may be performed,
comparing the power supply voltage of the storage battery for supplying power to the external load with a preset voltage threshold, and if the power supply voltage is smaller than the preset voltage threshold, indicating that the current storage battery and at least one other storage battery are used for supplying power to the external load in series;
or alternatively, the process may be performed,
and comparing the power transmission rate of the power supplied by the external storage battery load with a preset power transmission rate threshold, and if the power transmission rate is smaller than the preset power transmission rate threshold, indicating that the current storage battery and at least one other storage battery are used for supplying power to the external load in series.
The beneficial effects of the technical scheme are as follows: if the residual electric quantity value is smaller than or equal to the preset electric quantity threshold value, the current storage battery is instructed to stop supplying power to the external load, other storage batteries are instructed to switch to supply power to the external load, and/or the photovoltaic power generation panel is instructed to increase the charging power of the current storage battery, so that the situation that the storage battery cannot continuously supply power to the external load due to insufficient electric quantity or the photovoltaic power generation panel is instructed to rapidly charge the storage battery can be avoided. If the power supply voltage is smaller than the preset voltage threshold, the current storage battery and at least one other storage battery are indicated to supply power to the external load in series, so that the power supply voltage to the external load can be increased. If the electric energy transmission rate is smaller than the preset electric energy transmission rate threshold, the current storage battery and at least one other storage battery are indicated to supply power to the external load in series, so that the electric energy transmission rate to the external load can be increased.
Preferably, in the step S3, acquiring real-time working state information of an external load connected to the photovoltaic power generation system and an ambient temperature of an area where the photovoltaic power generation system is located, so as to control the cold air injection device to radiate heat from the photovoltaic power generation system specifically includes:
acquiring real-time working voltage and real-time working current of an external load connected with the photovoltaic power generation system and the ambient temperature of an area where the photovoltaic power generation system is located, so as to determine the temperature of cold air sprayed by the cold air spraying equipment, and further radiate heat of the photovoltaic power generation system;
in the step S3, the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel are obtained, so as to control the heat dissipation fan to dissipate heat of the photovoltaic power generation system specifically includes:
the working state of a photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel are obtained, so that the rotating speed of the cooling fan is determined, and the photovoltaic power generation system dissipates heat.
The beneficial effects of the technical scheme are as follows: according to the real-time working voltage, the real-time working current and the environment temperature of an external load, the cold air temperature sprayed by the cold air spraying equipment is determined, and the whole photovoltaic power generation system can be rapidly cooled. According to the working state of the photovoltaic power generation panel and the working temperature of the photovoltaic power generation panel, the rotating speed of the cooling fan is determined, so that the cooling fan can be driven to adaptively operate according to the actual working state of the photovoltaic power generation panel, and the cooling efficiency of the cooling fan is improved.
Preferably, in the step S3, after controlling the cold air injection device and the cooling fan to dissipate heat of the photovoltaic power generation system, the method further includes switching the on/off state of the photovoltaic power generation panel according to the on/off state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated operating time of the photovoltaic power generation panel, so as to switch and supply power to the external load.
The beneficial effects of the technical scheme are as follows: according to the switching state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated working time of the photovoltaic power generation panel, the switching state of the photovoltaic power generation panel is switched, so that part of the photovoltaic power generation panel of the photovoltaic power generation system can be prevented from working for a long time in a concentrated mode, and the working load of the photovoltaic power generation panel is reduced.
Preferably, in the step S3, the real-time working voltage and the real-time working current of the external load connected to the photovoltaic power generation system and the ambient temperature of the area where the photovoltaic power generation system is located are obtained, so as to determine the temperature of the cold air sprayed by the cold air spraying device, thereby dissipating the heat of the photovoltaic power generation system specifically includes:
determining the cold air temperature sprayed by the cold air spraying device according to the real-time working voltage and the real-time working current of an external load connected with the photovoltaic power generation system and the ambient temperature of the area where the photovoltaic power generation system is positioned by using the following formula (1),
in the above formula (1), E (t) represents the temperature of the cold air injected by the cold air injection device at the current time; t represents the current time; q (Q) 0 Representing the ambient temperature at the current time; e (E) min Representing the lowest temperature which can be reached by the cold air sprayed by the cold air spraying equipment; u (U) 0 (t) represents the real-time operating voltage of the external load at the current moment; i 0 (t) represents the real-time operating current of the external load at the present moment; m represents the number of photovoltaic power generation panels included in each row in a photovoltaic power generation panel array of the photovoltaic power generation system; n represents the number of photovoltaic power generation panels included in each column in the photovoltaic power generation panel array of the photovoltaic power generation system; p (P) e Representing the highest output power value of a single photovoltaic power generation panel;
in the step S3, the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel are obtained, so as to determine the rotation speed of the cooling fan, thereby cooling the photovoltaic power generation system specifically includes:
the following formula (2) is utilized to determine the rotating speed of the cooling fan according to the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel,
in the above formula (2), ω [ t_ (i, j)]Indicating the rotation speed of a cooling fan arranged on a photovoltaic power generation panel of an ith row and a jth column in a photovoltaic power generation panel array of a photovoltaic power generation system at the current moment t, if omega [ t_ (i, j)]If the calculated value in the above formula (2) is less than 0, ω [ t_ (i, j) is directly calculated]The result of (2) is taken as 0; u [ t_ (i, j)]The output voltage value of a photovoltaic power generation panel of the ith row and the jth column in a photovoltaic power generation panel array of the photovoltaic power generation system at the current moment t is represented; f { } represents a positive number test function, when the value in the bracket is a positive number, the function value of the positive number test function is 1, and when the value in the bracket is not a positive number, the function value of the positive number test function is 0; omega max Indicating the maximum rotation speed of the cooling fan; t (i, j) represents the accumulated working time of the photovoltaic power generation panels of the ith row and the jth column in the photovoltaic power generation panel array of the photovoltaic power generation system at the current moment T; t is t 0 Indicating the starting working time of the photovoltaic power generation system; q [ t_ (i, j)]The working temperature of a photovoltaic power generation panel of an ith row and a jth column in a photovoltaic power generation panel array of the photovoltaic power generation system at the current moment t is represented;representing Q [ t_ (i, j) in the process of taking the value of i from 1 to n and taking the value of j from 1 to m]Is the maximum value of (2);
in the step S3, the switching state of the photovoltaic power generation panel is switched according to the switching state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated operating time of the photovoltaic power generation panel, so as to realize the switching power supply to the external load specifically including:
determining a threshold value of the accumulated working time of the photovoltaic power generation panel corresponding to the switching of the photovoltaic power generation panel from the on state to the off state according to the on-off state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated working time of the photovoltaic power generation panel by using the following formula (3),
in the above formula (3), T 0 Indicating a threshold value of accumulated working time of the photovoltaic power generation panel corresponding to the switching of the photovoltaic power generation panel from the on state to the off state;representing the process of taking the value of i from 1 to n and taking the value of j from 1 to m, and satisfying F { u [ t_ (i, j)]When the condition of } ×T (i, j) noteq0, F { u [ t_ (i, j)]A minimum value of } ×t (i, j);
satisfying F { u [ t_ (i, j)]When the condition of } =0, the condition satisfying T (i, j) is selected from all photovoltaic power generation panels of the photovoltaic power generation system<T 0 And all photovoltaic power generation panels in an on state, and sequentially switching the corresponding photovoltaic power generation panels from the on state to the off state in the order of T (i, j) from large to small, and not satisfying T (i, j)<T 0 And all photovoltaic power generation panels in the closed state sequentially switch the corresponding photovoltaic power generation panels from the closed state to the open state according to the sequence from small to large of T (i, j), so that the external load is switched and supplied with power.
The beneficial effects of the technical scheme are as follows: the temperature of the sprayed cold air is controlled according to the current use condition of the external load and the ambient temperature by utilizing the formula (1), and the temperature of the cold air is adaptively adjusted according to the ambient temperature and the current use condition of the external load, so that when the ambient temperature is lower and the external load is less used, the temperature of the cold air can be properly adjusted to be higher, thereby saving energy consumption and avoiding resource waste; then, according to the current opening and closing state of the photovoltaic power generation panels of the photovoltaic power generation system, the music base working time and the working temperature value of the photovoltaic power generation panels, the rotating speed of the cooling fans arranged on the photovoltaic power generation panels of each photovoltaic power generation system is controlled by utilizing the formula (2), so that the rotating speeds of the cooling fans are controlled in a coordinated manner in multiple aspects, each cooling fan is independently controlled, the heat dissipation effect of each photovoltaic power generation panel is ensured, and meanwhile, the energy consumption can be reduced to the greatest extent; finally, the photovoltaic power generation panel is controlled to be shut down according to the current opening and closing state of the photovoltaic power generation panel and the accumulated working time by utilizing the formula (3), and the photovoltaic power generation panel in the current closing state is replaced, so that the photovoltaic power generation panel with lower utilization rate is replaced by the photovoltaic power generation panel with higher utilization rate, all the photovoltaic power generation panels can be used uniformly, the photovoltaic power generation panel with higher utilization rate is replaced, the photovoltaic power generation panel with higher utilization rate can be temporarily stopped, the reasonable shut down and heat dissipation are facilitated, and the resource consumption of cold air is saved.
As can be seen from the above embodiments, the heat dissipation method based on the load usage situation of the photovoltaic power generation system adjusts the panel posture orientation of each photovoltaic power generation panel according to the solar illumination information of the area where the photovoltaic power generation system is located, so as to ensure that the photovoltaic power generation panel can receive solar illumination to the maximum extent to realize efficient photovoltaic power generation; meanwhile, the state information of the electric quantity of the storage battery connected with each photovoltaic power generation panel and the power supply parameter information of the storage battery to an external load are also acquired, and the power transmission state of the storage battery by the photovoltaic power generation panel and/or the power supply state of the external load by the storage battery are adjusted, so that the overall work load of the photovoltaic power generation system can be adjusted, and the stable and continuous work of the photovoltaic power generation system is ensured; and then according to the real-time working state information of an external load and the environmental temperature of the area where the external load is positioned, the cold air injection equipment is controlled to radiate the photovoltaic power generation system, and according to the on-off state and the working temperature of the photovoltaic power generation panel, the radiating fan is controlled to radiate the photovoltaic power generation system, so that the photovoltaic power generation system radiates in time, and the whole normal work of the photovoltaic power generation system is ensured.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (8)

1. The heat dissipation method based on the load service condition of the photovoltaic power generation system is characterized by comprising the following steps of:
step S1, collecting solar illumination information of an area where a photovoltaic power generation system is located, and determining a real-time solar illumination state of each photovoltaic power generation panel included in the photovoltaic power generation system; according to the real-time solar illumination state, adjusting the panel posture orientation of each photovoltaic power generation panel;
step S2, acquiring the state information of the electric quantity of the storage battery and the power supply parameter information of the external load, which are connected with each photovoltaic power generation panel, so as to adjust the power transmission state of the photovoltaic power generation panel to the storage battery and/or the power supply state of the storage battery to the external load;
step S3, acquiring real-time working state information of an external load connected with the photovoltaic power generation system and the environment temperature of an area where the photovoltaic power generation system is located, so as to control the cold air injection equipment to radiate heat of the photovoltaic power generation system; the method comprises the steps of obtaining the switching state of a photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel, and controlling the cooling fan to cool the photovoltaic power generation system.
2. The method for dissipating heat based on load usage of a photovoltaic power generation system according to claim 1, wherein:
in the step S1, collecting solar illumination information of an area where the photovoltaic power generation system is located, and determining a real-time solar illumination state of each photovoltaic power generation panel included in the photovoltaic power generation system specifically includes: collecting a sunlight height angle of an area where a photovoltaic power generation system is located; and calibrating the sunlight height angle according to the geographical coordinates of all photovoltaic power generation panels of the photovoltaic power generation system in the region, so as to determine the real-time sunlight height angle of each photovoltaic power generation panel.
3. The method for dissipating heat based on load usage of a photovoltaic power generation system according to claim 2, wherein:
in the step S1, adjusting the panel posture orientation of each photovoltaic power generation panel according to the real-time solar illumination state specifically includes:
and adjusting the pitch angle of the light receiving surface of each photovoltaic power generation panel according to the real-time sunlight height angle, so that the light receiving surface of each photovoltaic power generation panel is always perpendicular to the propagation direction of sunlight.
4. The method for dissipating heat based on load usage of a photovoltaic power generation system according to claim 1, wherein:
in the step S2, the obtaining of the state information of the electric quantity of the storage battery itself connected to each photovoltaic power generation panel and the information of the power supply parameters to the external load specifically includes:
and acquiring the residual electric quantity value of the storage battery connected with each photovoltaic power generation panel, and the power supply voltage and the power transmission rate of the storage battery for supplying power to an external load.
5. The method for dissipating heat based on load usage of a photovoltaic power generation system according to claim 4, wherein:
in the step S2, adjusting the power transmission state of the photovoltaic power generation panel to the storage battery and/or the power supply state of the storage battery to the external load specifically includes:
comparing the residual electric quantity value of the storage battery with a preset electric quantity threshold value, and if the residual electric quantity value is smaller than or equal to the preset electric quantity threshold value, indicating that the current storage battery stops supplying power to an external load, indicating that other storage batteries are switched to supply power to the external load, and/or indicating that the photovoltaic power generation panel increases the charging power of the current storage battery;
or alternatively, the process may be performed,
comparing the power supply voltage of the storage battery for supplying power to the external load with a preset voltage threshold, and if the power supply voltage is smaller than the preset voltage threshold, indicating that the current storage battery and at least one other storage battery are used for supplying power to the external load in series;
or alternatively, the process may be performed,
and comparing the power transmission rate of the power supplied by the external storage battery load with a preset power transmission rate threshold, and if the power transmission rate is smaller than the preset power transmission rate threshold, indicating that the current storage battery and at least one other storage battery are used for supplying power to the external load in series.
6. The method for dissipating heat based on load usage of a photovoltaic power generation system according to claim 1, wherein:
in the step S3, acquiring real-time working state information of an external load connected with the photovoltaic power generation system and an ambient temperature of an area where the photovoltaic power generation system is located, so as to control the cold air injection device to radiate heat of the photovoltaic power generation system specifically includes:
acquiring real-time working voltage and real-time working current of an external load connected with the photovoltaic power generation system and the ambient temperature of an area where the photovoltaic power generation system is located, so as to determine the temperature of cold air sprayed by the cold air spraying equipment, and further radiate heat of the photovoltaic power generation system;
in the step S3, the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel are obtained, so that the control of the cooling fan to cool the photovoltaic power generation system specifically includes:
the working state of a photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel are obtained, so that the rotating speed of the cooling fan is determined, and the photovoltaic power generation system dissipates heat.
7. The method for dissipating heat based on load usage of a photovoltaic power generation system according to claim 6, wherein:
in the step S3, after the cooling air injection device and the cooling fan are controlled to dissipate heat of the photovoltaic power generation system, the method further comprises switching the switching state of the photovoltaic power generation panel according to the switching state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated working time of the photovoltaic power generation panel, so that the external load is switched and powered.
8. The method for dissipating heat based on load usage of a photovoltaic power generation system according to claim 7, wherein:
in the step S3, the real-time working voltage and the real-time working current of the external load connected with the photovoltaic power generation system and the ambient temperature of the area where the photovoltaic power generation system is located are obtained, so as to determine the cold air temperature sprayed by the cold air spraying device, thereby radiating the photovoltaic power generation system specifically includes: determining the cold air temperature sprayed by the cold air spraying device according to the real-time working voltage and the real-time working current of an external load connected with the photovoltaic power generation system and the ambient temperature of the area where the photovoltaic power generation system is positioned by using the following formula (1),
in the above formula (1), E (t) represents the temperature of the cold air injected by the cold air injection device at the current time; t represents the current time; q (Q) 0 Representing the ambient temperature at the current time; e (E) min Representing the lowest temperature which can be reached by the cold air sprayed by the cold air spraying equipment; u (U) 0 (t) represents the real-time operating voltage of the external load at the current moment; i 0 (t) represents the real-time operating current of the external load at the present moment; m represents the number of photovoltaic power generation panels included in each row in a photovoltaic power generation panel array of the photovoltaic power generation system; n represents the number of photovoltaic power generation panels included in each column in the photovoltaic power generation panel array of the photovoltaic power generation system; p (P) e Representing the highest output power value of a single photovoltaic power generation panel;
in the step S3, the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel are obtained, so as to determine the rotation speed of the cooling fan, thereby cooling the photovoltaic power generation system specifically includes:
the following formula (2) is utilized to determine the rotating speed of the cooling fan according to the working state of the photovoltaic power generation panel of the photovoltaic power generation system and the working temperature of the photovoltaic power generation panel,
in the above formula (2), ω [ t_ (i, j)]Photovoltaic power generation panel device for displaying ith row and jth column in photovoltaic power generation panel array of current time t photovoltaic power generation systemThe rotation speed of the heat-dissipating fan is ω [ t_ (i, j)]If the calculated value in the above formula (2) is less than 0, ω [ t_ (i, j) is directly calculated]The result of (2) is taken as 0; u [ t_ (i, j)]The output voltage value of a photovoltaic power generation panel of the ith row and the jth column in a photovoltaic power generation panel array of the photovoltaic power generation system at the current moment t is represented; f { } represents a positive number test function, when the value in the bracket is a positive number, the function value of the positive number test function is 1, and when the value in the bracket is not a positive number, the function value of the positive number test function is 0; omega max Indicating the maximum rotation speed of the cooling fan; t (i, j) represents the accumulated working time of the photovoltaic power generation panels of the ith row and the jth column in the photovoltaic power generation panel array of the photovoltaic power generation system at the current moment T; t is t 0 Indicating the starting working time of the photovoltaic power generation system; q [ t_ (i, j)]The working temperature of a photovoltaic power generation panel of an ith row and a jth column in a photovoltaic power generation panel array of the photovoltaic power generation system at the current moment t is represented;representing Q [ t_ (i, j) in the process of taking the value of i from 1 to n and taking the value of j from 1 to m]Is the maximum value of (2);
in the step S3, the switching state of the photovoltaic power generation panel is switched according to the switching state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated operating time of the photovoltaic power generation panel, so as to realize the switching power supply to the external load specifically includes:
determining a threshold value of the accumulated working time of the photovoltaic power generation panel corresponding to the switching of the photovoltaic power generation panel from the on state to the off state according to the on-off state of the photovoltaic power generation panel of the photovoltaic power generation system and the accumulated working time of the photovoltaic power generation panel by using the following formula (3),
in the above formula (3), T 0 Indicating a threshold value of accumulated working time of the photovoltaic power generation panel corresponding to the switching of the photovoltaic power generation panel from the on state to the off state; representing the process of taking the value of i from 1 to n and taking the value of j from 1 to m, and satisfying F { u [ t_ (i, j)]When the condition of } ×T (i, j) noteq0, F { u [ t_ (i, j)]A minimum value of } ×t (i, j);
satisfying F { u [ t_ (i, j)]When the condition of } =0, the condition satisfying T (i, j) is selected from all photovoltaic power generation panels of the photovoltaic power generation system<T 0 And all photovoltaic power generation panels in an on state, and sequentially switching the corresponding photovoltaic power generation panels from the on state to the off state in the order of T (i, j) from large to small, and not satisfying T (i, j)<T 0 And all photovoltaic power generation panels in the closed state sequentially switch the corresponding photovoltaic power generation panels from the closed state to the open state according to the sequence from small to large of T (i, j), so that the external load is switched and supplied with power.
CN202211251347.4A 2022-10-13 2022-10-13 Load service condition heat dissipation method based on photovoltaic power generation system Pending CN116915150A (en)

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