CN116914716A - Photovoltaic power generation system based on single-component parallel connection - Google Patents
Photovoltaic power generation system based on single-component parallel connection Download PDFInfo
- Publication number
- CN116914716A CN116914716A CN202211699875.6A CN202211699875A CN116914716A CN 116914716 A CN116914716 A CN 116914716A CN 202211699875 A CN202211699875 A CN 202211699875A CN 116914716 A CN116914716 A CN 116914716A
- Authority
- CN
- China
- Prior art keywords
- photovoltaic
- panel
- power generation
- controller
- sweeping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010248 power generation Methods 0.000 title claims abstract description 92
- 238000010408 sweeping Methods 0.000 claims description 64
- 239000011159 matrix material Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 17
- 239000012459 cleaning agent Substances 0.000 claims description 12
- 238000005286 illumination Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 235000003642 hunger Nutrition 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- 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
- H02S40/10—Cleaning arrangements
-
- 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
-
- 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
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
- H02J2300/26—The renewable source being solar energy of photovoltaic origin involving maximum power point tracking control for photovoltaic sources
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a photovoltaic power generation system based on single-component parallel connection, which is characterized in that a plurality of photovoltaic power generation modules working independently are connected to the same direct current bus to supply power to a direct current load; each photovoltaic power generation module comprises a photovoltaic micro-controller and a plurality of single photovoltaic modules connected to the photovoltaic micro-controller in parallel; each single photovoltaic module is used as an independent photovoltaic power generation main body, when one single photovoltaic module fails, other single photovoltaic modules can keep working normally, and the single photovoltaic modules with the failure can be cut off in time, so that the stable and continuous working of the photovoltaic power generation system is ensured; in addition, the photovoltaic micro-controller is used for carrying out direct-current voltage boosting treatment, so that accurate and stable voltage power supply to a direct-current load can be ensured.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic power generation system based on single-component parallel connection.
Background
Solar energy has taken a certain place in the electricity market as a clean energy source. In order to ensure the efficiency and the total power generation amount of solar power generation, a large number of photovoltaic panels are generally required to be connected in series, so that electric energy generated by photovoltaic power generation of the photovoltaic panels can be integrally conveyed into a storage battery for storage, and then power is supplied to a load through a corresponding power supply circuit. For a large-scale photovoltaic power generation field, the photovoltaic panel can inevitably fail after long-time work, and because different photovoltaic panels are connected in series, the normal work of other photovoltaic panels can be influenced, so that the stable and sustainable operation of the whole photovoltaic power generation field can not be ensured, and the power generation efficiency of the photovoltaic power generation field is reduced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a photovoltaic power generation system based on single-component parallel connection, which connects a plurality of photovoltaic power generation modules working independently to the same direct current bus to supply power to a direct current load; each photovoltaic power generation module comprises a photovoltaic micro-controller and a plurality of single photovoltaic modules connected to the photovoltaic micro-controller in parallel; the photovoltaic micro controller can boost the preset direct current voltage range required by the direct current voltage pump generated by all the single photovoltaic modules, and can also detect the working state information of each single photovoltaic module connected with the photovoltaic micro controller and control the on-off state of each single photovoltaic module according to the working state information; each single photovoltaic module of the photovoltaic power generation system is used as an independent photovoltaic power generation main body, when one single photovoltaic module fails, other single photovoltaic modules can keep working normally, and the single photovoltaic modules with the failure can be cut off in time, so that the stable and continuous working of the photovoltaic power generation system is ensured; in addition, the photovoltaic micro-controller is used for carrying out direct-current voltage boosting treatment, so that accurate and stable voltage power supply to a direct-current load can be ensured.
The invention provides a photovoltaic power generation system based on single-component parallel connection, which comprises:
a plurality of photovoltaic power generation modules, all of which are connected to the same DC bus and supply power to a DC load through the DC bus,
each photovoltaic power generation module includes:
a photovoltaic microcontroller;
a plurality of monolithic photovoltaic modules connected in parallel to the photovoltaic microcontroller; each single photovoltaic module is used for independently carrying out photovoltaic power generation;
the photovoltaic micro-controller is used for pumping the direct current generated by all the single photovoltaic modules connected with the photovoltaic micro-controller into a preset direct current voltage range required by the direct current load, so that the direct current power supply is carried out on the direct current load through the direct current bus;
the photovoltaic micro-controller is also used for detecting the working state information of each single photovoltaic module connected with the photovoltaic micro-controller and controlling the on-off state of each single photovoltaic module according to the working state information.
Further, the photovoltaic microcontroller comprises a maximum power point tracking unit;
the maximum power point tracking unit is used for detecting the photovoltaic power generation voltage of each single photovoltaic module in real time so as to track the highest voltage/current value of each single photovoltaic module in the photovoltaic power generation process, so that each single photovoltaic module supplies power to the direct current bus at the maximum output power.
Further, the photovoltaic micro-controller comprises a photovoltaic module working state detection unit and a photovoltaic module on-off switching unit;
the photovoltaic module working state detection unit is used for detecting the working voltage, the working current and the working temperature of each single photovoltaic module;
the photovoltaic module on-off switching unit is used for adjusting the on-off connection state between each single photovoltaic module and the photovoltaic micro-controller according to at least one of the working voltage, the working current and the working temperature.
Further, the photovoltaic module working state detection unit comprises a current sensor, a voltage sensor and a temperature sensor;
the current sensor is used for detecting the working current of each single photovoltaic module in the photovoltaic power generation process;
the voltage sensor is used for detecting the working voltage of each photovoltaic module in the photovoltaic power generation process;
the temperature sensor is used for detecting the working temperature of each photovoltaic module in the photovoltaic power generation process;
the photovoltaic module on-off switching unit is used for switching off the connection between the corresponding single photovoltaic module and the photovoltaic micro-controller when the working current exceeds a preset current threshold, the working voltage exceeds a preset voltage threshold or the working temperature exceeds a preset temperature threshold.
Further, in each photovoltaic power generation module, the number of individual photovoltaic modules connected to the photovoltaic micro-controller is not more than four.
Further, the photovoltaic power generation module further comprises a wireless communication assembly;
the wireless communication assembly is connected with the photovoltaic micro-controller and used for uploading the information of the working state detected by the photovoltaic micro-controller to a cloud server;
and the cloud server is also used for controlling the working time of each single photovoltaic module according to the working state information.
Further, each monolithic photovoltaic module comprises a photovoltaic panel, a light sensing array, a panel orientation adjuster, and a first controller;
the illumination sensing array comprises a plurality of illumination sensors which are uniformly arranged in a non-photosensitive area at the periphery of the photovoltaic panel and are used for detecting the sunlight height angle of the external environment where the photovoltaic panel is positioned;
the first controller is respectively connected with the illumination sensing array and the panel orientation regulator and is used for sending an action instruction to the panel orientation regulator according to the solar altitude angle;
the panel orientation adjuster is used for adjusting the orientation of the photosensitive surface of the photovoltaic panel according to the action instruction, so that the photosensitive surface is perpendicular to the irradiation direction of sunlight.
Further, each monolithic photovoltaic module further comprises a camera, a panel cleaner, and a second controller;
the camera is used for shooting the photosensitive surface of the photovoltaic panel to obtain a photosensitive surface image;
the second controller is respectively connected with the camera and the panel cleaner and is used for analyzing the image of the photosensitive surface and determining the position and the area of the stains on the photosensitive surface;
the second controller is also used for indicating the panel cleaner to aim at the spot position and spray a corresponding amount of cleaning agent according to the spot position and the spot area so as to clean the spot.
Further, the panel cleaner is directed at the spot location and sprays a corresponding amount of cleaning agent to spot clean the spot, comprising: if the area of the stains is larger than the preset area threshold, transversely spraying the cleaning agent or longitudinally spraying the cleaning agent on the area where the stains are located, determining the sweeping direction and the sweeping speed of the panel cleaner according to the distribution condition of the stains, and selecting the sweeping area and the sweeping sequence of the panel cleaner according to the position frame of the stains, wherein the process is as follows:
step S1, taking the lower left vertex of the photosensitive surface image as an origin, taking the left edge as a Y axis upwards, taking the lower edge as an X axis to right, establishing a plane rectangular coordinate system, detecting stains by unit length of the X axis and the Y axis, positioning the stains by adopting coordinate points of the plane rectangular coordinate system,
selecting a scan area of the panel cleaner according to the stain position frame using the following formula (1),
in the above-mentioned formula (1),lower left vertex coordinates representing a sweep area of the panel cleaner; />Upper left vertex coordinates representing a sweep area of the panel cleaner; />Lower right vertex coordinates representing a sweep area of the panel cleaner; />Upper right vertex coordinates representing a sweep area of the panel cleaner; x (a) represents the abscissa of the a-th coordinate point at which the photosensitive surface image is identified as a stain; y (a) represents the ordinate of the a-th coordinate point at which the photosensitive surface image is identified as a stain; g represents a total number of coordinate points at which the photosensitive surface image is identified as a stain;
generating a panel stain matrix according to the coordinates of stains in the scanning area of the panel cleaner, wherein the generation process of the panel stain matrix comprises the following steps: sequentially detecting from the upper left corner coordinate of the scanning area according to the unit length of an X axis, if a stain exists on the corresponding coordinate, assigning an element value corresponding to the coordinate in the matrix as 1, if no stain exists on the corresponding coordinate, assigning an element value corresponding to the coordinate in the matrix as 0, and after the detection of the scanning area of the row is finished, starting the detection of the next row according to the unit length of a Y axis until the position of the lower right corner coordinate of the scanning area is detected, thereby forming the panel stain matrix, wherein W (i, j) represents the element value of the ith row and the jth column in the panel stain matrix;
step S2, utilizing the following formula (2), according to the panel stain matrix, starving the panel cleaner of the sweeping direction,
in the above formula (2), E represents a sweeping direction determination value of the panel cleaner; the absolute value is calculated by the expression; n represents the number of element values of each column in the panel stain matrix; m represents the number of element values of each row in the panel stain matrix;
if e=1, determining the sweeping direction of the panel cleaner as a transverse sweeping;
if e= -1, determining the sweeping direction of the panel cleaner as a longitudinal sweep;
step S3, determining the sweeping speed of the panel cleaner according to the distribution condition of the soil areas and the sweeping direction by using the following formula (3),
in the above formula (3), V (i) represents a sweeping speed of the panel cleaner when a sweeping direction of the panel cleaner is a lateral sweeping; v (j) represents a sweeping speed of the panel cleaner when a sweeping direction of the panel cleaner is a longitudinal sweeping; v (V) max Indicating a maximum sweep speed of the panel cleaner;
step S4, determining the scanning sequence of the panel cleaner according to the scanning direction of the stain area by using the following formula (4),
in the above formula (4), P represents a sweep sequence control value of the panel cleaner;
if p=2, then the sweeping sequence of the panel cleaner is controlled to sweep from left to right;
if p= -2, it means controlling the sweeping sequence of the panel cleaner to sweep from right to left;
if p=3, then the sweeping sequence of the panel cleaner is controlled to sweep from top to bottom;
if p= -3, this indicates that the sweeping sequence of the panel cleaner is controlled to sweep from bottom to top.
Compared with the prior art, the photovoltaic power generation system based on the single-component parallel connection connects a plurality of photovoltaic power generation modules which work independently to one another to the same direct current bus so as to supply power to a direct current load; each photovoltaic power generation module comprises a photovoltaic micro-controller and a plurality of single photovoltaic modules connected to the photovoltaic micro-controller in parallel; the photovoltaic micro controller can boost the preset direct current voltage range required by the direct current voltage pump generated by all the single photovoltaic modules, and can also detect the working state information of each single photovoltaic module connected with the photovoltaic micro controller and control the on-off state of each single photovoltaic module according to the working state information; each single photovoltaic module of the photovoltaic power generation system is used as an independent photovoltaic power generation main body, when one single photovoltaic module fails, other single photovoltaic modules can keep working normally, and the single photovoltaic modules with the failure can be cut off in time, so that the stable and continuous working of the photovoltaic power generation system is ensured; in addition, the photovoltaic micro-controller is used for carrying out direct-current voltage boosting treatment, so that accurate and stable voltage power supply to a direct-current load can be 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 structural diagram of a photovoltaic power generation system based on single-component parallel connection.
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 schematic structural diagram of a photovoltaic power generation system based on single-component parallel connection according to an embodiment of the present invention is shown. The photovoltaic power generation system based on single-component parallel connection comprises:
a plurality of photovoltaic power generation modules, all of which are connected to the same DC bus and supply power to the DC load through the DC bus,
each photovoltaic power generation module includes:
a photovoltaic microcontroller;
a plurality of monolithic photovoltaic modules connected in parallel to the photovoltaic microcontroller; each single photovoltaic module is used for independently carrying out photovoltaic power generation;
the photovoltaic micro-controller is used for pumping the direct current generated by all the single photovoltaic modules connected with the photovoltaic micro-controller into a preset direct current voltage range required by the direct current load, so that the direct current power supply is carried out on the direct current load through the direct current bus;
the photovoltaic micro-controller is also used for detecting the working state information of each single photovoltaic module connected with the photovoltaic micro-controller and controlling the on-off state of each single photovoltaic module according to the working state information.
The beneficial effects of the technical scheme are that: the photovoltaic power generation system based on single-component parallel connection connects a plurality of photovoltaic power generation modules which work independently to the same direct current bus so as to supply power to a direct current load; each photovoltaic power generation module comprises a photovoltaic micro-controller and a plurality of single photovoltaic modules connected to the photovoltaic micro-controller in parallel; the photovoltaic micro controller can boost the preset direct current voltage range required by the direct current voltage pump generated by all the single photovoltaic modules, and can also detect the working state information of each single photovoltaic module connected with the photovoltaic micro controller and control the on-off state of each single photovoltaic module according to the working state information; each single photovoltaic module of the photovoltaic power generation system is used as an independent photovoltaic power generation main body, when one single photovoltaic module fails, other single photovoltaic modules can keep working normally, and the single photovoltaic modules with the failure can be cut off in time, so that the stable and continuous working of the photovoltaic power generation system is ensured; in addition, the photovoltaic micro-controller is used for carrying out direct-current voltage boosting treatment, so that accurate and stable voltage power supply to a direct-current load can be ensured. Specifically, the photovoltaic micro-controller can boost the direct-current voltage of the single photovoltaic component of 30V-60V to the direct-current voltage range of 100V-1500V required by the direct-current load, thereby ensuring the normal and stable work of the direct-current load.
Preferably, the photovoltaic microcontroller comprises a maximum power point tracking unit;
the maximum power point tracking unit is used for detecting the photovoltaic power generation voltage of each single photovoltaic module in real time so as to track the highest voltage/current value of each single photovoltaic module in the photovoltaic power generation process, so that each single photovoltaic module supplies power to the direct current bus at the maximum output power.
The beneficial effects of the technical scheme are that: in the photovoltaic power generation process of each single photovoltaic module through the maximum power point tracking unit, the photovoltaic micro controller tracks the product value of the highest voltage and the current of each single photovoltaic module in real time, and indicates the maximum output power of each single photovoltaic module to supply power through the photovoltaic micro controller phase direct current bus by taking the product value of the highest voltage and the current as a reference, so that the power generation power and the efficiency of the photovoltaic power generation system are improved.
Preferably, the photovoltaic micro-controller comprises a photovoltaic module working state detection unit and a photovoltaic module on-off switching unit;
the photovoltaic module working state detection unit is used for detecting the working voltage, the working current and the working temperature of each single photovoltaic module;
the photovoltaic module on-off switching unit is used for adjusting the on-off connection state between each single photovoltaic module and the photovoltaic micro-controller according to at least one of the working voltage, the working current and the working temperature.
The beneficial effects of the technical scheme are that: each photovoltaic micro-controller is independently provided with a photovoltaic module working state detection unit and a photovoltaic module on-off switching unit, the working voltage, the working current and the working temperature of the single photovoltaic module in the working process are collected through the photovoltaic module working state detection unit, when the single photovoltaic module fails in the photovoltaic power generation process, the corresponding working voltage, working current and working temperature are abnormal, and whether the current working state of the single photovoltaic module is normal or not is determined through analyzing the working state parameters. And the on-off connection state between each single photovoltaic module and the photovoltaic micro controller is adjusted through the on-off switching unit of the photovoltaic module, so that the single photovoltaic module in an abnormal working state can be ensured to be cut off in time, and the phenomenon that the normal operation of the whole photovoltaic power generation system is influenced due to the occurrence of electric faults of the single photovoltaic module is avoided.
Preferably, the photovoltaic module working state detection unit comprises a current sensor, a voltage sensor and a temperature sensor;
the current sensor is used for detecting the working current of each single photovoltaic module in the photovoltaic power generation process;
the voltage sensor is used for detecting the working voltage of each photovoltaic module in the photovoltaic power generation process;
the temperature sensor is used for detecting the working temperature of each photovoltaic module in the photovoltaic power generation process;
the photovoltaic module on-off switching unit is used for switching off the connection between the corresponding single photovoltaic module and the photovoltaic micro-controller when the working current exceeds a preset current threshold value, or the working voltage exceeds a preset voltage threshold value, or the working temperature exceeds a preset temperature threshold value.
The beneficial effects of the technical scheme are that: and respectively comparing the detected working voltage, working current and working temperature to determine whether to shut off the connection between the corresponding single photovoltaic module and the photovoltaic micro-controller according to the comparison result, so that the connection state of the single photovoltaic module and the photovoltaic micro-controller can be switched timely and accurately.
Preferably, the number of individual photovoltaic modules connected to the photovoltaic microcontroller in each photovoltaic power generation module is not more than four.
The beneficial effects of the technical scheme are that: the number of the single photovoltaic modules to be connected with the photovoltaic micro-controller is not more than four, so that the operation cost of the photovoltaic power generation system can be reduced under the condition of ensuring the increase of the power generation of the photovoltaic power generation system.
Preferably, the photovoltaic power generation module further comprises a wireless communication component;
the wireless communication assembly is connected with the photovoltaic micro-controller and used for uploading the information of the working state detected by the photovoltaic micro-controller to the cloud server;
the cloud server is also used for controlling the working time of each single photovoltaic module according to the working state information.
The beneficial effects of the technical scheme are that: by utilizing the wireless communication assembly, the working state information detected by the photovoltaic micro-controller can be uploaded to the cloud server in real time, so that the cloud server can timely master the working condition of the photovoltaic power generation system.
Preferably, each monolithic photovoltaic module comprises a photovoltaic panel, a light sensing array, a panel orientation regulator, and a first controller;
the illumination sensing array comprises a plurality of illumination sensors which are uniformly arranged in a non-photosensitive area at the periphery of the photovoltaic panel and are used for detecting the sunlight height angle of the external environment where the photovoltaic panel is positioned;
the first controller is respectively connected with the illumination sensing array and the panel orientation regulator and is used for sending an action instruction to the panel orientation regulator according to the solar altitude;
the panel orientation adjuster is used for adjusting the orientation of the photosensitive surface of the photovoltaic panel according to the action instruction, so that the photosensitive surface is perpendicular to the sunlight irradiation direction.
The beneficial effects of the technical scheme are that: detecting the sunlight height angle of the external environment where the photovoltaic panel is currently located by using the illumination sensing array, and using the sunlight height angle as a reference standard, and indicating the panel to adjust the orientation of the photosensitive surface of the photovoltaic panel by using the first controller to the orientation adjuster, so that the photosensitive surface is always vertical to the sunlight irradiation direction, and the photosensitive surface receives the radiation of solar photons to the maximum extent; the panel orientation regulator may be, but is not limited to, a servo motor, which is in driving connection with the photovoltaic panel to adjust the inclination angle of the photovoltaic panel relative to the horizontal plane.
Preferably, each monolithic photovoltaic module further comprises a camera, a panel cleaner, and a second controller;
the camera is used for shooting the photosensitive surface of the photovoltaic panel to obtain a photosensitive surface image;
the second controller is respectively connected with the camera and the panel cleaner and is used for analyzing the image of the photosensitive surface and determining the position and the area of the stains on the photosensitive surface;
the second controller is also used for indicating the panel cleaner to aim at the spot position and spray a corresponding amount of cleaning agent according to the spot position and the spot area so as to clean the spot.
The beneficial effects of the technical scheme are that: the photosensitive surface of the photovoltaic panel is photographed by a camera to obtain a photosensitive surface image, and the photosensitive surface image is subjected to image recognition analysis processing by a second controller, so that the positions and the areas of stains on the photosensitive surface can be determined. And then, according to the spot position and the spot area, a corresponding amount of cleaning agent is sprayed to the spot position by a cleaning agent spray head of the panel cleaner, and the spot brushing cleaning is performed by directing a brush head of the panel cleaner to the spot position, so that the cleanliness of the photosensitive surface is ensured, and the sunlight receiving rate of the photosensitive surface is improved.
Preferably, the panel cleaner is aimed at the spot of the stain and sprays a corresponding amount of cleaning agent, and spot cleaning the stain comprises: if the area of the stains is larger than the preset area threshold, the area where the stains are located is sprayed with a transverse scanning type spray cleaner or a longitudinal scanning type spray cleaner, the scanning direction and the scanning speed of the panel cleaner are determined according to the distribution condition of the stains, and the scanning area and the scanning sequence of the panel cleaner are selected according to the position frame of the stains, wherein the process is as follows:
step S1, taking the lower left vertex of the photosensitive surface image as an origin, taking the left edge as a Y axis upwards, taking the lower edge as an X axis to right, establishing a plane rectangular coordinate system, detecting stains by unit length of the X axis and the Y axis, positioning the stains by adopting coordinate points of the plane rectangular coordinate system,
selecting a scan area of the panel cleaner according to the stain position frame using the following formula (1),
in the above-mentioned formula (1),lower left vertex coordinates representing a sweep area of the panel cleaner; />Upper left vertex coordinates representing a sweep area of the panel cleaner; />Lower right vertex coordinates representing a sweep area of the panel cleaner; />Upper right vertex coordinates representing a sweep area of the panel cleaner; x (a) represents the abscissa of the a-th coordinate point at which the photosensitive surface image is identified as a stain; y (a) represents the ordinate of the a-th coordinate point at which the photosensitive surface image is recognized as a stain; g represents a total of coordinate points at which the photosensitive surface image is recognized as a stainA number;
generating a panel stain matrix according to the coordinates of stains in a scanning area of the panel cleaner, wherein the generating process of the panel stain matrix comprises the following steps: sequentially detecting from the left upper corner coordinate of the scanning area from left to right according to the unit length of the X axis, if a stain exists on the corresponding coordinate, assigning an element value corresponding to the coordinate in the matrix as 1, if no stain exists on the corresponding coordinate, assigning an element value corresponding to the coordinate in the matrix as 0, and after the detection of the scanning area of the row is finished, starting the detection of the next row according to the unit length of the Y axis until the position of the right lower corner coordinate of the scanning area is detected, thereby forming the panel stain matrix, wherein W (i, j) represents the element value of the ith row and the jth column in the panel stain matrix;
step S2, using the following formula (2), starving the panel cleaner according to the panel stain matrix,
in the above formula (2), E represents a sweeping direction determination value of the panel cleaner; the absolute value is calculated by the expression; n represents the number of element values of each column in the panel stain matrix; m represents the number of element values of each row in the panel stain matrix;
if e=1, determining the sweeping direction of the panel cleaner as a transverse sweeping;
if e= -1, determining the sweeping direction of the panel cleaner as a longitudinal sweeping;
step S3, determining the sweeping speed of the panel cleaner according to the distribution condition of the soil areas and the sweeping direction by using the following formula (3),
in the above formula (3), V (i) represents a sweeping speed of the panel cleaner when a sweeping direction of the panel cleaner is a lateral sweeping; v (j)Indicating a sweeping speed of the panel cleaner when a sweeping direction of the panel cleaner is a longitudinal sweeping; v (V) max Indicating a maximum sweep speed of the panel cleaner;
step S4, determining the scanning sequence of the panel cleaner according to the scanning direction of the stain area by using the following formula (4),
in the above formula (4), P represents a sweep sequence control value of the panel cleaner;
if p=2, then the sweeping sequence of the panel cleaner is controlled to sweep from left to right;
if p= -2, then the sweeping sequence of the panel cleaner is controlled to sweep from right to left;
if p=3, then the sweeping sequence of the panel cleaner is controlled to sweep from top to bottom;
if p= -3, this indicates that the sweeping sequence of the panel cleaner is controlled to sweep from bottom to top.
The beneficial effects of the technical scheme are that: selecting a scanning area of the panel cleaner according to the spot position frame by utilizing the formula (1), so that the spot area is scanned and cleaned in a targeted manner, and the cleaning reliability is ensured; then, the scanning direction of the panel cleaner is determined according to the panel soil matrix by utilizing the formula (2), so that the scanning from the soil-free area to the soil-free area can reduce the splashing of the soil to the soil-free area during cleaning, and the increase of the cleaning frequency is avoided; the sweeping speed of the panel cleaner is determined according to the distribution condition of the area of the stains and the sweeping direction by utilizing the formula (3), so that the sweeping time of the areas with more stains in the sweeping area is prolonged, the sweeping time of the areas with less stains is reduced, and further, the water resource is saved under the condition of ensuring reliable cleaning; and finally, determining the scanning sequence according to the scanning direction of the panel cleaner by utilizing the formula (4), and further confirming that the cleaner scans from the non-stained area to the stained area, so as to ensure more thorough cleaning.
As can be seen from the foregoing embodiments, the photovoltaic power generation system based on the single-component parallel connection connects a plurality of photovoltaic power generation modules that work independently of each other to the same dc bus, so as to supply power to the dc load; each photovoltaic power generation module comprises a photovoltaic micro-controller and a plurality of single photovoltaic modules connected to the photovoltaic micro-controller in parallel; the photovoltaic micro controller can boost the preset direct current voltage range required by the direct current voltage pump generated by all the single photovoltaic modules, and can also detect the working state information of each single photovoltaic module connected with the photovoltaic micro controller and control the on-off state of each single photovoltaic module according to the working state information; each single photovoltaic module of the photovoltaic power generation system is used as an independent photovoltaic power generation main body, when one single photovoltaic module fails, other single photovoltaic modules can keep working normally, and the single photovoltaic modules with the failure can be cut off in time, so that the stable and continuous working of the photovoltaic power generation system is ensured; in addition, the photovoltaic micro-controller is used for carrying out direct-current voltage boosting treatment, so that accurate and stable voltage power supply to a direct-current load can be 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 (9)
1. A photovoltaic power generation system based on single component parallel connection, comprising:
a plurality of photovoltaic power generation modules, all of which are connected to the same DC bus and supply power to a DC load through the DC bus, characterized in that,
each photovoltaic power generation module includes:
a photovoltaic microcontroller;
a plurality of monolithic photovoltaic modules connected in parallel to the photovoltaic microcontroller; each single photovoltaic module is used for independently carrying out photovoltaic power generation;
the photovoltaic micro-controller is used for pumping the direct current generated by all the single photovoltaic modules connected with the photovoltaic micro-controller into a preset direct current voltage range required by the direct current load, so that the direct current power supply is carried out on the direct current load through the direct current bus;
the photovoltaic micro-controller is also used for detecting the working state information of each single photovoltaic module connected with the photovoltaic micro-controller and controlling the on-off state of each single photovoltaic module according to the working state information.
2. The single component parallel-based photovoltaic power generation system of claim 1, wherein: the photovoltaic micro controller comprises a maximum power point tracking unit;
the maximum power point tracking unit is used for detecting the photovoltaic power generation voltage of each single photovoltaic module in real time so as to track the highest voltage/current value of each single photovoltaic module in the photovoltaic power generation process, so that each single photovoltaic module supplies power to the direct current bus at the maximum output power.
3. The single component parallel-based photovoltaic power generation system of claim 1, wherein: the photovoltaic micro controller comprises a photovoltaic module working state detection unit and a photovoltaic module on-off switching unit;
the photovoltaic module working state detection unit is used for detecting the working voltage, the working current and the working temperature of each single photovoltaic module;
the photovoltaic module on-off switching unit is used for adjusting the on-off connection state between each single photovoltaic module and the photovoltaic micro-controller according to at least one of the working voltage, the working current and the working temperature.
4. A single component parallel-based photovoltaic power generation system according to claim 3, wherein: the photovoltaic module working state detection unit comprises a current sensor, a voltage sensor and a temperature sensor;
the current sensor is used for detecting the working current of each single photovoltaic module in the photovoltaic power generation process;
the voltage sensor is used for detecting the working voltage of each photovoltaic module in the photovoltaic power generation process;
the temperature sensor is used for detecting the working temperature of each photovoltaic module in the photovoltaic power generation process; the photovoltaic module on-off switching unit is used for switching off the connection between the corresponding single photovoltaic module and the photovoltaic micro-controller when the working current exceeds a preset current threshold, the working voltage exceeds a preset voltage threshold or the working temperature exceeds a preset temperature threshold.
5. The single component parallel-based photovoltaic power generation system of claim 1, wherein: in each photovoltaic power generation module, the number of single photovoltaic modules connected with the photovoltaic micro-controller is not more than four.
6. The single component parallel-based photovoltaic power generation system of claim 1, wherein: the photovoltaic power generation module further comprises a wireless communication assembly;
the wireless communication assembly is connected with the photovoltaic micro-controller and used for uploading the information of the working state detected by the photovoltaic micro-controller to a cloud server;
and the cloud server is also used for controlling the working time of each single photovoltaic module according to the working state information.
7. The single component parallel-based photovoltaic power generation system of claim 1, wherein: each monolithic photovoltaic module comprises a photovoltaic panel, an illumination sensing array, a panel orientation adjuster and a first controller;
the illumination sensing array comprises a plurality of illumination sensors which are uniformly arranged in a non-photosensitive area at the periphery of the photovoltaic panel and are used for detecting the sunlight height angle of the external environment where the photovoltaic panel is positioned;
the first controller is respectively connected with the illumination sensing array and the panel orientation regulator and is used for sending an action instruction to the panel orientation regulator according to the solar altitude angle;
the panel orientation adjuster is used for adjusting the orientation of the photosensitive surface of the photovoltaic panel according to the action instruction, so that the photosensitive surface is perpendicular to the irradiation direction of sunlight.
8. The single component parallel-based photovoltaic power generation system of claim 7, wherein:
each monolithic photovoltaic module further comprises a camera, a panel cleaner, and a second controller;
the camera is used for shooting the photosensitive surface of the photovoltaic panel to obtain a photosensitive surface image; the second controller is respectively connected with the camera and the panel cleaner and is used for analyzing the image of the photosensitive surface and determining the position and the area of the stains on the photosensitive surface; the second controller is also used for indicating the panel cleaner to aim at the spot position and spray a corresponding amount of cleaning agent according to the spot position and the spot area so as to clean the spot.
9. The single component parallel-based photovoltaic power generation system of claim 8, wherein:
the panel cleaner is directed at the spot location and sprays a corresponding amount of cleaning agent to spot clean the spot, comprising: if the area of the stains is larger than the preset area threshold, transversely spraying the cleaning agent or longitudinally spraying the cleaning agent on the area where the stains are located, determining the sweeping direction and the sweeping speed of the panel cleaner according to the distribution condition of the stains, and selecting the sweeping area and the sweeping sequence of the panel cleaner according to the position frame of the stains, wherein the process is as follows:
step S1, taking the lower left vertex of the photosensitive surface image as an origin, taking the left edge as a Y axis upwards, taking the lower edge as an X axis to right, establishing a plane rectangular coordinate system, detecting stains by unit length of the X axis and the Y axis, positioning the stains by adopting coordinate points of the plane rectangular coordinate system,
selecting a scan area of the panel cleaner according to the stain position frame using the following formula (1),
in the above-mentioned formula (1),lower left vertex coordinates representing a sweep area of the panel cleaner; />Upper left vertex coordinates representing a sweep area of the panel cleaner; />Lower right vertex coordinates representing a sweep area of the panel cleaner; />Upper right vertex coordinates representing a sweep area of the panel cleaner; x (a) represents the abscissa of the a-th coordinate point at which the photosensitive surface image is identified as a stain; y (a) represents the ordinate of the a-th coordinate point at which the photosensitive surface image is identified as a stain; g represents a total number of coordinate points at which the photosensitive surface image is identified as a stain;
generating a panel stain matrix according to the coordinates of stains in the scanning area of the panel cleaner, wherein the generation process of the panel stain matrix comprises the following steps: sequentially detecting from the upper left corner coordinate of the scanning area according to the unit length of an X axis, if a stain exists on the corresponding coordinate, assigning an element value corresponding to the coordinate in the matrix as 1, if no stain exists on the corresponding coordinate, assigning an element value corresponding to the coordinate in the matrix as 0, and after the detection of the scanning area of the row is finished, starting the detection of the next row according to the unit length of a Y axis until the position of the lower right corner coordinate of the scanning area is detected, thereby forming the panel stain matrix, wherein W (i, j) represents the element value of the ith row and the jth column in the panel stain matrix;
step S2, utilizing the following formula (2), according to the panel stain matrix, starving the panel cleaner of the sweeping direction,
in the above formula (2), E represents a sweeping direction determination value of the panel cleaner; the absolute value is calculated by the expression; n represents the number of element values of each column in the panel stain matrix; m represents the number of element values of each row in the panel stain matrix;
if e=1, determining the sweeping direction of the panel cleaner as a transverse sweeping;
if e= -1, determining the sweeping direction of the panel cleaner as a longitudinal sweep;
step S3, determining the sweeping speed of the panel cleaner according to the distribution condition of the soil areas and the sweeping direction by using the following formula (3),
in the above formula (3), V (i) represents a sweeping speed of the panel cleaner when a sweeping direction of the panel cleaner is a lateral sweeping; v (j) represents a sweeping speed of the panel cleaner when a sweeping direction of the panel cleaner is a longitudinal sweeping; v (V) max Indicating a maximum sweep speed of the panel cleaner;
step S4, determining the scanning sequence of the panel cleaner according to the scanning direction of the stain area by using the following formula (4),
in the above formula (4), P represents a sweep sequence control value of the panel cleaner;
if p=2, then the sweeping sequence of the panel cleaner is controlled to sweep from left to right;
if p= -2, it means controlling the sweeping sequence of the panel cleaner to sweep from right to left;
if p=3, then the sweeping sequence of the panel cleaner is controlled to sweep from top to bottom;
if p= -3, this indicates that the sweeping sequence of the panel cleaner is controlled to sweep from bottom to top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211699875.6A CN116914716A (en) | 2022-12-28 | 2022-12-28 | Photovoltaic power generation system based on single-component parallel connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211699875.6A CN116914716A (en) | 2022-12-28 | 2022-12-28 | Photovoltaic power generation system based on single-component parallel connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116914716A true CN116914716A (en) | 2023-10-20 |
Family
ID=88351667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211699875.6A Pending CN116914716A (en) | 2022-12-28 | 2022-12-28 | Photovoltaic power generation system based on single-component parallel connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116914716A (en) |
-
2022
- 2022-12-28 CN CN202211699875.6A patent/CN116914716A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8449692B2 (en) | Heliostat field cleaning system | |
| US10447199B2 (en) | Automated solar panel cleaning | |
| JP2012190953A (en) | Solar cell panel cleaning device and solar cell panel cleaning method | |
| CN115617048B (en) | Unmanned cleaning method and system for photovoltaic power station | |
| CN114596267A (en) | Monitoring operation and maintenance method, system, equipment and storage medium of photovoltaic power station | |
| CN111830984A (en) | Multi-machine cooperative car washing system and method based on unmanned car washing equipment | |
| CN110780673B (en) | Heliostat night cleaning system based on searchlight guidance | |
| CN114226323A (en) | Intelligent robot suitable for operation and maintenance dust removal of photovoltaic power station and control method | |
| CN116914716A (en) | Photovoltaic power generation system based on single-component parallel connection | |
| CN111687860A (en) | Method for photovoltaic cleaning robot to autonomously select cleaning operation path | |
| CN216880648U (en) | Intelligent robot suitable for cleaning dust of operation and maintenance of photovoltaic power station | |
| CN116192029A (en) | Unmanned plane cluster cooperation type photovoltaic panel cleaning system and cooperative control method thereof | |
| CN112677154B (en) | Artificial intelligent cleaning robot collaborative cleaning method and system | |
| CN117614110A (en) | Photovoltaic equipment operation and maintenance system and method | |
| CN116388669A (en) | Photovoltaic panel foreign matter detection and cleaning method based on Swin transducer | |
| CN111687857A (en) | Photovoltaic cleaning robot capable of identifying photovoltaic array placement mode | |
| CN115121528A (en) | Photovoltaic cleaning system and cleaning method | |
| CN109298715A (en) | Robot traveling control system and traveling control method | |
| Balamurugan et al. | Integrated IoT System for Automatic Dust Cleaning of Solar Panels | |
| CN108566155B (en) | Photovoltaic power generation system, and control method and device of photovoltaic power generation system | |
| CN115251782A (en) | Cleaning robot control method based on slotless armature direct current servo motor | |
| CN117282698B (en) | Photovoltaic cleaning robot and method for autonomously selecting cleaning route thereof | |
| CN109725653A (en) | A kind of operational system and O&M method of solar tracking photovoltaic array | |
| CN113953241A (en) | Flight device for high-pressure washing of photovoltaic panel and cleaning method | |
| CN117754613B (en) | Control system of photovoltaic cleaning robot and robot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |