CN112766668B - Power management method and system for roof photovoltaic device - Google Patents
Power management method and system for roof photovoltaic device Download PDFInfo
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Abstract
The invention discloses a power management method and a system of a roof photovoltaic device, wherein the power management system of the roof photovoltaic device comprises a server, a collector and a first alarm; the collector and the first alarm are both in communication connection with the server; the rooftop photovoltaic device includes a photovoltaic power generation panel; the collector comprises a current and voltage sensor and a solar irradiance sensor arranged on a roof; the collector is arranged on the photovoltaic power generation plate; according to the power management method of the roof photovoltaic device, provided by the invention, people can find the interference factors of the external environment on photovoltaic power generation in time, so that faults can be eliminated quickly, and the normal operation of the photovoltaic power generation panel is guaranteed.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation management, in particular to a power management method and system for a roof photovoltaic device.
Background
Along with the increasing exhaustion of global fossil fuel resources, the gradual deterioration of environmental pollution and the worry of people about nuclear power safety; the development and utilization of clean, safe and inexhaustible new energy, especially solar energy, are more and more favored by people. People mainly use the photo-thermal conversion in the form of directly and massively utilizing solar energy in the early stage, and the solar energy is more and more popular in power generation along with the development of the photovoltaic power generation technology and the gradual reduction of the cost.
At present, solar power generation is mainly divided into a roof and a large-scale ground power station, the roof photovoltaic power station is widely commented by the market due to the convenience of arrangement and the power generation efficiency capable of better covering the requirement of a single power consumption family, so that the method for arranging a solar power generation panel on the roof for photovoltaic power generation is gradually popularized and popularized.
In practical application scenarios, however, the rooftop photovoltaic device is often interfered by various external environments to cause the reduction of the power generation efficiency, such as: dust in the air falls on the surface of the photovoltaic module, leaves, light waste impurities cover the surface of the photovoltaic module and the like; in practical application, people cannot find the interference factors in time and process the interference factors, so that the power generation efficiency of the roof photovoltaic device is greatly reduced.
Disclosure of Invention
The invention mainly aims to provide a power management method and a power management system for a roof photovoltaic device, and aims to solve the problems that the power generation efficiency of the existing roof photovoltaic device is reduced due to the fact that the existing roof photovoltaic device is often interfered by various external environments, but people cannot find interference factors in time.
The technical scheme provided by the invention is as follows:
the invention provides a power management method of a roof photovoltaic device, which is applied to a power management system of the roof photovoltaic device; the power management system of the roof photovoltaic device comprises a server, a collector and a first alarm; the collector and the first alarm are both in communication connection with the server; the rooftop photovoltaic device includes a photovoltaic power generation panel; the collector comprises a current and voltage sensor and a solar irradiance sensor arranged on a roof; the current and voltage sensor is arranged on the photovoltaic power generation panel; the first alarm is arranged indoors; the power management method of the rooftop photovoltaic device includes:
respectively acquiring real-time output current and real-time output voltage acquired by the current and voltage sensor on the photovoltaic power generation panel at each time acquisition point;
generating real-time output power corresponding to the photovoltaic power generation panel according to the real-time output current and the real-time output voltage;
acquiring standard generating power of the photovoltaic power generation panel;
calculating to obtain a difference value between the standard generating power and the real-time output power;
judging whether the difference value is larger than a first preset value or not;
if so, marking the time acquisition point corresponding to the difference value as the starting point moment;
acquiring real-time irradiance collected by the solar irradiance sensor from the starting point moment in a preset time period, and acquiring the real-time output power generated from the starting point moment in the preset time period;
calculating to obtain a Pearson coefficient according to the real-time irradiance and the real-time output power at each moment in the preset time period:
wherein the Pearson correlation coefficient ρ 1 Representing a correlation between the real-time irradiance and the real-time output power, X representing the real-time irradiance, and Y representing the real-time output power;
judging whether the Pearson correlation coefficient is larger than a second preset value or not;
and when the alarm is not larger than the preset threshold value, controlling the first alarm to give out a first alarm sound.
Preferably, the power management system of the rooftop photovoltaic device further comprises a camera and a second alarm communicatively connected to the server; the camera and the second alarm are both arranged on the roof; judging whether the Pearson correlation coefficient is larger than a second preset value or not, and then judging;
when the number of the photovoltaic panels is not larger than the preset value, acquiring a picture of the panel of the photovoltaic power generation panel, which is shot by the camera;
judging whether living animals exist on the photovoltaic power generation panel or not by carrying out image recognition on the photos;
if so, controlling the second alarm to give out a second alarm sound so as to drive the living animal.
Preferably, the power management system of the rooftop photovoltaic device further comprises a blower communicatively connected to the server; the blowing device is arranged on the photovoltaic power generation panel, and an air outlet of the blowing device faces the photovoltaic power generation panel; the photo is subjected to image recognition to judge whether a living animal exists on the photovoltaic power generation panel, and then the method further comprises the following steps;
if not, judging whether sundries exist on the photovoltaic power generation panel or not by carrying out image recognition on the photo;
and when sundries exist, the first alarm is controlled to give a third alarm sound, and the blowing device is controlled to blow air so as to blow away the sundries.
Preferably, when there are sundries, the method further comprises the following steps of controlling the first alarm to give a third alarm sound, and controlling the blowing device to blow air so as to blow away the sundries:
executing the judgment again to judge whether the Pearson correlation coefficient is larger than a second preset value;
if not, controlling the first alarm to give a fourth alarm sound so as to remind an operator to clean dust or check whether the photovoltaic power generation panel is damaged or not.
Preferably, the number of the photovoltaic power generation panels is multiple; the number of the current voltage sensors is consistent with that of the photovoltaic power generation plates, and the current voltage sensors correspond to the photovoltaic power generation plates one to one; each current voltage sensor is arranged at the corresponding photovoltaic power generation panel; the collector also comprises a temperature sensor arranged on the roof; the temperature sensor is in communication connection with the server; the marking the time acquisition point corresponding to the difference value as the starting point moment further comprises:
acquiring the difference values of all the photovoltaic power generation panels;
acquiring the number of the photovoltaic power generation panels of which the difference value is greater than the first preset value;
judging whether the number is larger than a third preset value or not;
if yes, acquiring the real-time temperature acquired by the temperature sensor;
judging whether the real-time temperature is greater than a fourth preset value or not;
and when the alarm is not larger than the preset threshold value, controlling the first alarm to give a fifth alarm sound.
Preferably, the power management system of the rooftop photovoltaic device further comprises a wireless communicator communicatively coupled to the server; the wireless communicator is used for communicating with the intelligent terminal; the judging whether the pearson correlation coefficient is greater than a second preset value further comprises:
and when the alarm information is not larger than the preset alarm value, the wireless communicator is controlled to send alarm information to the intelligent terminal.
Preferably, the power management system of the rooftop photovoltaic device further comprises a display communicatively coupled to the server; the display is arranged indoors; the method of power management of a rooftop photovoltaic device further comprises:
and controlling the display to display the real-time output current, the real-time output voltage, the standard power generation power and the real-time output power of the photovoltaic power generation panel.
Preferably, the display is further configured to display an icon corresponding to the photovoltaic power generation panel; the controlling the first alarm to give out a first alarm sound then further comprises:
and controlling the icon corresponding to the photovoltaic power generation panel to flicker.
Preferably, the power management system of the rooftop photovoltaic device further comprises a memory and an input component, both communicatively connected to the server; the memory is used for storing the standard generated power; the method of power management of a rooftop photovoltaic device further comprises:
acquiring the standard generated power input through the input component;
storing the standard generated power to the memory.
The invention also provides a power management system of the roof photovoltaic device, which is applied to the power management method of the roof photovoltaic device; the power management system of the roof photovoltaic device comprises a server, a collector and a first alarm; the collector and the first alarm are both in communication connection with the server; the rooftop photovoltaic device includes a photovoltaic power generation panel; the collector comprises a current and voltage sensor and a solar irradiance sensor arranged on a roof; the current and voltage sensor is arranged on the photovoltaic power generation panel; the first alarm is arranged indoors.
Through above-mentioned technical scheme, can realize following beneficial effect:
according to the power management method of the roof photovoltaic device, provided by the invention, people can find interference factors of an external environment on photovoltaic power generation in time, so that faults can be eliminated quickly, and normal operation of the photovoltaic power generation panel is guaranteed.
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In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a first embodiment of a power management method for a rooftop photovoltaic device according to the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The invention provides a power management method and system for a roof photovoltaic device.
As shown in fig. 1, in a first embodiment of a power management method for a rooftop photovoltaic device according to the present invention, the present embodiment is applied to a power management system for a rooftop photovoltaic device; the power management system of the rooftop photovoltaic device comprises a server, a collector and a first alarm; the collector and the first alarm are both in communication connection with the server; the rooftop photovoltaic device includes a photovoltaic power generation panel; the collector comprises a current and voltage sensor and a solar irradiance sensor arranged on a roof; the current and voltage sensor is arranged on the photovoltaic power generation panel; the first alarm is arranged indoors; the embodiment comprises the following steps:
step S101: and respectively acquiring the real-time output current and the real-time output voltage acquired by the current and voltage sensor on the photovoltaic power generation panel at each time acquisition point.
Specifically, the server respectively acquires the real-time output current and the real-time output voltage acquired by the current and voltage sensor on the photovoltaic power generation panel at each time acquisition point. The respective time acquisition points are preferably acquired once per minute, i.e. each time acquisition point differs by 1 minute.
Step S102: and generating real-time output power corresponding to the photovoltaic power generation panel according to the real-time output current and the real-time output voltage.
Specifically, the server generates real-time output power corresponding to the photovoltaic power generation panel according to the real-time output current and the real-time output voltage.
Step S103: and acquiring the standard generating power of the photovoltaic power generation panel.
Specifically, the server obtains the standard power generation power of the photovoltaic power generation panel. The standard generated power is generated power of the photovoltaic power generation panel under a normal working state.
Step S104: and calculating to obtain the difference value between the standard generating power and the real-time output power.
Specifically, the server calculates a difference between the standard generated power and the real-time output power. The difference here indicates whether the photovoltaic power generation panel is generating power normally.
Step S105: and judging whether the difference value is larger than a first preset value or not.
Specifically, the server judges whether the difference value is larger than a first preset value. The first preset value is determined according to the absolute value of the standard generated power, preferably 0.3 of the absolute value of the standard generated power, which is 300W in this embodiment.
If yes, go to step S106: and marking the time acquisition point corresponding to the difference value as the starting point moment.
Specifically, the server marks the time acquisition point corresponding to the difference as the starting point time. If so, the photovoltaic power generation panel is proved to be not working normally, and if yes, the abnormality exists, and the reason for the abnormality needs to be found.
Step S107: and acquiring real-time irradiance collected by the solar irradiance sensor from the starting moment for a preset time period, and acquiring the real-time output power generated from the starting moment for the preset time period.
Specifically, the server obtains real-time irradiance collected by the solar irradiance sensor from the starting point time for a preset time period, and obtains the real-time output power generated from the starting point time for the preset time period. The preset time period here is 10 minutes.
Step S108: calculating to obtain a Pearson coefficient according to the real-time irradiance and the real-time output power at each moment in the preset time period:
wherein the Pearson correlation coefficient ρ 1 Representing a correlation between the real-time irradiance and the real-time output power, X representing the real-time irradiance, and Y representing the real-time output power.
Specifically, the server calculates the pearson coefficient according to the real-time irradiance and the real-time output power at each moment in the preset time period.
Step S109: and judging whether the Pearson correlation coefficient is larger than a second preset value or not.
Specifically, the server judges whether the pearson correlation coefficient is greater than a second preset value. The preset value is preferably 0.8, the pearson correlation coefficient is an index for measuring the correlation between the real-time irradiance and the real-time output power, the value interval is (-1.1), when the value interval is greater than 0, the real-time irradiance and the real-time output power are in positive correlation, and the closer to 1, the stronger the correlation between the irradiance and the real-time output power is.
Actually, under normal conditions, the output power of the photovoltaic panel should be positively correlated to the real-time irradiance, that is, the stronger the real-time irradiance is, the higher the output power of the corresponding photovoltaic panel is, therefore, if the photovoltaic panel has sundries blocking sunlight, the correlation between the output power and the real-time irradiance is damaged, that is, when the difference value is greater than 0.8, the correlation between the output power and the real-time irradiance is strong, so that no blocking exists between the photovoltaic panel and the sunlight, that is, no sundries exist, the real-time output power is weakened because the sunlight is weakened, and when the difference value is not greater than 0.8, the correlation between the output power and the real-time irradiance is weak, so that blocking exists between the photovoltaic panel and the sunlight, that is, the sundries are likely to exist, and need to be cleaned.
Step S110: and when the alarm is not larger than the preset threshold value, controlling the first alarm to give out a first alarm sound.
Specifically, when the alarm is not larger than the preset alarm threshold, the server controls the first alarm to give out a first alarm sound. The personnel in the room are reminded to go to the roof to overhaul and check, and faults are eliminated in time, and the normal operation of the photovoltaic power generation panel is guaranteed. The first alarm sound here may be "please notice that the power generation board is abnormal"
According to the power management method of the roof photovoltaic device, provided by the invention, people can find interference factors of an external environment on photovoltaic power generation in time, so that faults can be eliminated quickly, and normal operation of the photovoltaic power generation panel is guaranteed.
In a second embodiment of the method for power management of a rooftop photovoltaic device as set forth in this embodiment, based on the first embodiment, the power management system of the rooftop photovoltaic device further includes a camera and a second alarm communicatively connected to the server; the camera and the second alarm are both arranged on the roof; step S109, the following steps are included;
step S201: and when the number of the photovoltaic panels is not larger than the preset value, acquiring a picture of the panel of the photovoltaic panel shot by the camera.
Specifically, when the number of the photovoltaic panels is not larger than the number of the photovoltaic panels, the server obtains the pictures of the panels of the photovoltaic panels, which are shot by the camera.
Step S202: and carrying out image recognition on the photo to judge whether a living animal exists on the photovoltaic power generation panel.
Specifically, the server performs image recognition on the photo to judge whether a living animal exists on the photovoltaic power generation panel. Such as a bird, on a photovoltaic panel
If yes, go to step S203: and controlling the second alarm to give out a second alarm sound so as to repel the living animal.
Specifically, the server controls the second alarm to give a second alarm sound to drive the living animal. The second warning sound here may be a "dribble" urge to repel a live animal.
In a third embodiment of the power management method for a rooftop photovoltaic device according to the present invention, based on the second embodiment, the power management system for a rooftop photovoltaic device further includes an air blowing device communicatively connected to the server; the blowing device is arranged on the photovoltaic power generation panel, and an air outlet of the blowing device faces the photovoltaic power generation panel; step S202, then also comprising;
if not, executing step S301: and identifying the picture to judge whether sundries exist on the photovoltaic power generation panel.
Specifically, the server identifies the picture to judge whether sundries exist on the photovoltaic power generation panel.
Step S302 is executed: and when sundries exist, the first alarm is controlled to give a third alarm sound, and the blowing device is controlled to blow air so as to blow away the sundries.
Specifically, when sundries exist, the server controls the first alarm to give a third alarm sound and controls the blowing device to blow air so as to blow away the sundries. The third alarm sound can be 'please notice that the power generation board has sundries' to remind an operator to find a fault in time and perform corresponding treatment.
In a fourth embodiment of the power management method for a rooftop photovoltaic device according to the present invention, based on the third embodiment, step S302 is followed by the following steps:
step S401: and judging whether the Pearson correlation coefficient is larger than a second preset value or not.
Specifically, the server executes step S109 again to determine whether the photovoltaic power generation panel is operating normally after the above fault processing step.
If not, go to step S402: and controlling the first alarm to give a fourth alarm sound so as to remind an operator to clean dust or check whether the photovoltaic power generation panel is damaged or not.
Specifically, if the situation is not met, the fact that the photovoltaic power generation panel still does not work normally after the sundries are blown away and the living animals are driven is proved, so that other faults exist, namely the structural fault of the photovoltaic power generation panel, and dust on the photovoltaic power generation panel, and therefore the server controls the first alarm to give out a fourth alarm sound to remind an operator to clean the dust or check whether the photovoltaic power generation panel is damaged or not. The fourth warning sound here may be "please note that the photovoltaic power generation panel may be dusty or damaged".
In a fifth embodiment of the power management method for a rooftop photovoltaic device according to the present invention, based on the fourth embodiment, the number of the photovoltaic power generation panels is plural; the number of the current voltage sensors is consistent with that of the photovoltaic power generation plates, and the current voltage sensors correspond to the photovoltaic power generation plates one to one; each current voltage sensor is arranged at the corresponding photovoltaic power generation panel; the collector also comprises a temperature sensor arranged on the roof; the temperature sensor is in communication connection with the server; step S106, then, further includes the following steps:
step S501: and acquiring the difference values of all the photovoltaic power generation panels.
Specifically, the server acquires the difference values of all the photovoltaic power generation panels.
Step S502: and acquiring the number of the photovoltaic power generation panels of which the difference value is greater than the first preset value.
Specifically, the server obtains the number of the photovoltaic power generation panels of which the difference value is greater than the first preset value. Namely, the number of the photovoltaic power generation panels with the power generation power lower than the normal power generation power is obtained.
Step S503: and judging whether the number is greater than a third preset value.
Specifically, the server judges whether the number is greater than a third preset value. The third preset value here relates to the total number of photovoltaic panels of the roof, in particular 60% of the total number of photovoltaic panels of the roof, preferably 6 in this embodiment.
If yes, go to step S504: and acquiring the real-time temperature acquired by the temperature sensor.
Specifically, the server obtains the real-time temperature acquired by the temperature sensor.
Step S505: and judging whether the real-time temperature is greater than a fourth preset value.
Specifically, the server judges whether the real-time temperature is greater than a fourth preset value. Since the generated power of the photovoltaic panel changes with the change of the air temperature, actually, if the surface temperature of the photovoltaic panel becomes high, the generated power will decrease, that is, the generated power shows a negative temperature characteristic; in a sunny day, the temperature of the surface of the photovoltaic power generation panel is 20-40 ℃ higher than the outside air temperature when the photovoltaic power generation panel is radiated, and when the surface temperature of the photovoltaic power generation panel reaches 30 ℃, the power generation power of the photovoltaic power generation panel is obviously reduced compared with the power generation power in a standard state.
The fourth preset value is preferably 20 ℃, then if the air temperature exceeds 20 ℃, the surface temperature of the photovoltaic power generation panel will reach at least 30 ℃, if the weather is clear, the surface temperature will reach 40 ℃, at this time, the power generation power of the photovoltaic power generation panel will be lower than the standard power generation power, and it is normal that the difference is larger than 300W.
Step S506: and when the alarm is not larger than the preset threshold value, controlling the first alarm to give out a fifth alarm sound.
However, if the outside air temperature is not greater than 20 ℃, it is determined that the generated power of the photovoltaic panel is not reduced due to the excessively high surface temperature, and other faults cause the reduction of the generated power of the photovoltaic panel, so that the server controls the first alarm to give a fifth alarm to remind an operator of timely maintenance, where the fifth alarm may be "please notice that the photovoltaic panel has an unknown fault".
In a sixth embodiment of the power management method for a rooftop photovoltaic device according to the present invention, based on any of the above embodiments, the power management system for a rooftop photovoltaic device further includes a wireless communicator communicatively connected to the server; the wireless communicator is used for communicating with the intelligent terminal; step S109, the following steps are also included thereafter:
step S601: and when the alarm information is not larger than the preset alarm information, controlling the wireless communicator to send alarm information to the intelligent terminal.
Specifically, the server controls the wireless communicator to send alarm information to the intelligent terminal. The intelligent terminal is preferably a mobile phone, so that people who are not indoors can be reminded of finding out the fault of the photovoltaic power generation panel in time.
In a seventh embodiment of the power management method for a rooftop photovoltaic device according to the present invention, based on any of the above embodiments, the power management system for a rooftop photovoltaic device further includes a display communicatively connected to the server; the display is arranged indoors; the embodiment further comprises the following steps:
step S701: and controlling the display to display the real-time output current, the real-time output voltage, the standard power generation power and the real-time output power of the photovoltaic power generation panel.
Specifically, the server controls the display to display the real-time output current, the real-time output voltage, the standard generated power and the real-time output power of the photovoltaic power generation panel. So that an operator can observe the operation parameters of each photovoltaic power generation panel in real time.
In an eighth embodiment of the power management method for a rooftop photovoltaic device according to the present invention, based on the seventh embodiment, the display is further configured to display an icon corresponding to the photovoltaic power generation panel; step S110, the following steps are also included thereafter:
step S801: and controlling the icon corresponding to the photovoltaic power generation panel to flicker.
Specifically, the server controls icons corresponding to the photovoltaic power generation panels to flicker. So as to remind operators of finding out the failed photovoltaic power generation panel.
In a ninth embodiment of the power management method for a rooftop photovoltaic device according to the present invention, based on the first embodiment, the power management system for a rooftop photovoltaic device further includes a memory and an input component, both of which are communicatively connected to the server; the memory is used for storing the standard generated power; this embodiment further comprises the steps of:
step S901: and acquiring the standard generated power input through the input component.
Specifically, the server acquires the standard generated power input through the input component. The input component here is a keyboard.
Step S902: storing the standard generated power to the memory.
Specifically, the server stores the standard generated power to the memory.
In a tenth embodiment of the power management method for a rooftop photovoltaic device according to the present invention, based on the first embodiment, step S101 further includes the following steps:
step S1001: and judging whether the real-time moment at the moment falls into a preset moment interval.
Specifically, the server determines whether the current real-time falls within a preset time interval. The preset time interval is determined according to the geographical position of the rooftop photovoltaic device, namely, the preset time interval is expressed as night, and the embodiment is preferably from 6 am to 6 pm.
If yes, go to step 101.
Specifically, in this embodiment, before the step S101 of the present invention, a determination is made as to whether the roof photovoltaic device is in the daytime, and the step S101 is started only when the time of the roof photovoltaic device is in the daytime, so as to perform the subsequent steps; because photovoltaic power generation board does not generate electricity night, need not to carry out fault management.
In an eleventh embodiment of the power management method of a rooftop photovoltaic device according to the present invention, based on the third embodiment, the blowing device is capable of blowing hot air; step S301, the following steps are also included:
step S1101: when no sundries exist, the photo is subjected to image recognition to judge whether snow exists on the photovoltaic power generation panel or not.
Specifically, when sundries do not exist, the server identifies the pictures to judge whether snow exists on the photovoltaic power generation panel or not.
If yes, go to step S1102: and controlling the first alarm to give out a sixth alarm sound, and controlling the blowing device to blow hot air so as to melt the accumulated snow.
Specifically, if there is snow, the power generation of the photovoltaic power generation panel is seriously hindered, so the server controls the first alarm to give a sixth alarm sound and controls the blowing device to blow hot air to melt the snow.
The invention also provides a power management system of the roof photovoltaic device, which is applied to any one of the embodiments of the power management method of the roof photovoltaic device provided by the invention; the power management system of the roof photovoltaic device comprises a server, a collector and a first alarm; the collector and the first alarm are both in communication connection with the server; the rooftop photovoltaic device includes a photovoltaic power generation panel; the collector comprises a current and voltage sensor and a solar irradiance sensor arranged on a roof; the current and voltage sensor is arranged on the photovoltaic power generation panel; the first alarm is arranged indoors.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (such as a ROM/RAM, a magnetic disk, and an optical disk), and includes several instructions for enabling a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A power management method of a roof photovoltaic device is characterized in that the method is applied to a power management system of the roof photovoltaic device; the power management system of the rooftop photovoltaic device comprises a server, a collector and a first alarm; the collector and the first alarm are both in communication connection with the server; the rooftop photovoltaic device includes a photovoltaic power generation panel; the collector comprises a current and voltage sensor and a solar irradiance sensor arranged on a roof; the current and voltage sensor is arranged on the photovoltaic power generation panel; the first alarm is arranged indoors; the power management method of the rooftop photovoltaic device includes:
respectively acquiring real-time output current and real-time output voltage acquired by the current and voltage sensor on the photovoltaic power generation panel at each time acquisition point;
generating real-time output power corresponding to the photovoltaic power generation panel according to the real-time output current and the real-time output voltage;
acquiring standard generating power of the photovoltaic power generation panel;
calculating to obtain a difference value between the standard generating power and the real-time output power;
judging whether the difference value is larger than a first preset value or not;
if so, marking the time acquisition point corresponding to the difference value as the starting point moment;
acquiring real-time irradiance collected by the solar irradiance sensor from the starting point moment in a preset time period, and acquiring the real-time output power generated from the starting point moment in the preset time period;
calculating to obtain a Pearson coefficient according to the real-time irradiance and the real-time output power at each moment in the preset time period:
wherein the Pearson correlation coefficient ρ 1 Representing a correlation between the real-time irradiance and the real-time output power, X representing the real-time irradiance, and Y representing the real-time output power;
judging whether the Pearson correlation coefficient is larger than a second preset value or not;
and when the alarm is not larger than the preset threshold value, controlling the first alarm to give out a first alarm sound.
2. The method of claim 1, wherein the power management system further comprises a camera and a second alarm communicatively coupled to the server; the camera and the second alarm are both arranged on the roof; judging whether the Pearson correlation coefficient is larger than a second preset value or not, and then judging;
when the number of the photovoltaic panels is not larger than the preset value, acquiring a picture of the panel of the photovoltaic power generation panel, which is shot by the camera;
judging whether living animals exist on the photovoltaic power generation panel or not by carrying out image recognition on the photos;
if so, controlling the second alarm to give out a second alarm sound so as to drive the living animal.
3. The method of claim 2, wherein the power management system further comprises a blower communicatively coupled to the server; the blowing device is arranged on the photovoltaic power generation panel, and an air outlet of the blowing device faces the photovoltaic power generation panel; the photo is subjected to image recognition to judge whether a living animal exists on the photovoltaic power generation panel, and then the method further comprises the following steps;
if not, judging whether sundries exist on the photovoltaic power generation panel or not by carrying out image recognition on the photo;
and when sundries exist, the first alarm is controlled to give a third alarm sound, and the blowing device is controlled to blow air so as to blow away the sundries.
4. The method of claim 3, wherein the first alarm is controlled to sound a third alarm when debris is present, and the blowing device is controlled to blow air to blow away debris, and thereafter further comprising:
executing the judgment again to judge whether the Pearson correlation coefficient is larger than a second preset value;
if not, the first alarm is controlled to send out a fourth alarm sound to remind an operator to clean dust or check whether the photovoltaic power generation panel is damaged or not.
5. The method of claim 4, wherein the number of photovoltaic panels is plural; the number of the current voltage sensors is consistent with that of the photovoltaic power generation plates, and the current voltage sensors correspond to the photovoltaic power generation plates one to one; each current voltage sensor is arranged at the corresponding photovoltaic power generation panel; the collector also comprises a temperature sensor arranged on the roof; the temperature sensor is in communication connection with the server; the marking the time acquisition point corresponding to the difference value as the starting point moment further comprises:
acquiring the difference values of all the photovoltaic power generation panels;
acquiring the number of the photovoltaic power generation panels of which the difference value is greater than the first preset value;
judging whether the number is larger than a third preset value or not;
if yes, acquiring the real-time temperature acquired by the temperature sensor;
judging whether the real-time temperature is greater than a fourth preset value or not;
and when the alarm is not larger than the preset threshold value, controlling the first alarm to give a fifth alarm sound.
6. The method of power management of a rooftop photovoltaic device as recited in any of claims 1-5, wherein the power management system of the rooftop photovoltaic device further comprises a wireless communicator communicatively coupled to the server; the wireless communicator is used for communicating with the intelligent terminal; the judging whether the pearson correlation coefficient is greater than a second preset value further comprises:
and when the alarm information is not larger than the preset alarm value, the wireless communicator is controlled to send alarm information to the intelligent terminal.
7. The method of any one of claims 1-5, wherein the power management system further comprises a display communicatively coupled to the server; the display is arranged indoors; the method of power management of a rooftop photovoltaic device further includes:
and controlling the display to display the real-time output current, the real-time output voltage, the standard power generation power and the real-time output power of the photovoltaic power generation panel.
8. The method of claim 7, wherein the display is further configured to display an icon corresponding to the photovoltaic panel; the controlling the first alarm to give out a first alarm sound then further comprises:
and controlling the icon corresponding to the photovoltaic power generation panel to flicker.
9. The method of claim 1, wherein the power management system further comprises a memory and an input component, wherein the memory and the input component are both communicatively coupled to the server; the memory is used for storing the standard generated power; the method of power management of a rooftop photovoltaic device further comprises:
acquiring the standard generated power input through the input component;
storing the standard generated power to the memory.
10. A power management system of a rooftop photovoltaic device, characterized by being applied to a power management method of a rooftop photovoltaic device according to any one of claims 1 to 9; the power management system of the roof photovoltaic device comprises a server, a collector and a first alarm; the collector and the first alarm are both in communication connection with the server; the rooftop photovoltaic device includes a photovoltaic power generation panel; the collector comprises a current and voltage sensor and a solar irradiance sensor arranged on a roof; the current and voltage sensor is arranged on the photovoltaic power generation panel; the first alarm is arranged indoors.
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| GB2529708A (en) * | 2014-09-01 | 2016-03-02 | Sec Dep For Business Innovation & Skills | System and method for condition detection |
| CN105139104B (en) * | 2015-07-27 | 2019-05-07 | 上海许继电气有限公司 | System and method for component operation data analysis in photovoltaic power station |
| WO2019163413A1 (en) * | 2018-02-20 | 2019-08-29 | 太陽誘電株式会社 | Photovoltaic power generation failure diagnosis device, photovoltaic power generation failure diagnosis method, and program |
| CN112085258A (en) * | 2020-08-13 | 2020-12-15 | 国网上海市电力公司 | A real-time monitoring method for abnormal regional photovoltaic power generation based on big data technology |
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Denomination of invention: A power management method and system for rooftop photovoltaic devices Effective date of registration: 20231106 Granted publication date: 20220830 Pledgee: China Co. truction Bank Corp Yiyang branch Pledgor: Huaxiang XiangNeng Technology Co.,Ltd. Registration number: Y2023980063452 |