BE1030831A1 - Method for detecting the operating state of a photovoltaic panel and detection system - Google Patents

Abstract

The present invention relates to a method for detecting the working state of a photovoltaic panel and a detection system, and comprises: acquiring real-time voltage data and real-time current data in a zone of target detection during the same predefined time period; calculate the real-time power of each photovoltaic panel; presetting a power standard value of the photovoltaic panel in a normal operating state, and comparing the real-time power of each photovoltaic panel with the power standard value; and, when an abnormality exists in the working state of the photovoltaic panel, providing a real-time alarm based on the location of the photovoltaic panel in which the abnormality exists. The present invention effectively improves the efficiency and accuracy of detection of photovoltaic panels over a large area in a photovoltaic power station.

Description

Method for detecting the operating state of a photovoltaic panel and detection system

TECHNICAL AREA

The present invention relates to the technical field of inspection of photovoltaic panels, and in particular to a method of detecting the operating state of a photovoltaic panel and detection system.

CONTEXT

Photovoltaic power generation is a technology that uses the photovoltaic effect at the semiconductor interface to directly convert light energy into electricity. It mainly consists of three elements: the solar panel, the regulator and the inverter, and the main elements are made of electronic components. Solar cells are connected in series and then encapsulated for protection to form a large area solar cell module, coupled with power regulators and other components to form a photovoltaic power generation device.

However, the existing technology, the current photovoltaic power plant is composed of many identical specifications of the photovoltaic panel, due to the large number of photovoltaic panels, so it is not possible to detect the working status of each photovoltaic panel one by one , traditional detection most of the time depends on the maintenance personnel of each photovoltaic panel for inspection, but this is both delayed and does not have the detection accuracy. Therefore, the method of detecting the working status of a photovoltaic panel and the detection system is a technical problem that needs to be urgently solved by technicians in this field.

SUMMARY

The purpose of the present invention is to provide a method for detecting the working state of a photovoltaic panel and a detection system, in which the present invention calculates the power value of each photovoltaic panel by obtaining the voltage and current of each photovoltaic panel in an area. The present invention determines whether there is an abnormality in the working state of a photovoltaic panel on the basis of comparing its power value with a standard value, thereby effectively improving the detection efficiency of the photovoltaic panel. photovoltaic panels over a large area in a photovoltaic power plant, and improves the traditional form of detection which relies on manpower.

The present invention improves the following problem: in the prior art, current photovoltaic power plants are composed of many photovoltaic panels with the same specifications, and due to the large number of photovoltaic panels, it is not possible to detect the state operation of each photovoltaic panel one by one. The present invention, by means of a system-based automation device, detects the voltage and current of each photovoltaic panel in the same preset time period, determines the real-time power of each photovoltaic panel, and according to From the comparison between the real-time power and the preset power standard value, it can be effectively determined whether each photovoltaic panel is in an abnormal operating state. According to the comparison between the real-time power and the preset power standard value, it can be effectively determined whether each photovoltaic panel is in an abnormal working state, and it is possible to effectively realize comprehensive and integrated detection. photovoltaic panels over a large area in the region, which improves detection efficiency.

The present invention improves the existing technology, most of the traditional detection depends on maintenance personnel for each photovoltaic panel inspection, there is both time delay and does not have the problem of detection accuracy, the present invention invention through the various photovoltaic panels in the normal operating state of the effective area and irradiation intensity of all photovoltaic panels in the calculation of the standard value of the power, to exclude the existence of the human inspection due to the human inspection of the difference in the interval of the solar light irradiation intensity value. The solar radiation intensity and effective area changes under the influence of different environments, which improves the accuracy of detecting the working status of photovoltaic panels while improving the detection efficiency.

In order to achieve the aforementioned objective, the present invention proposes the following technical solution:

A method for detecting the working state of a photovoltaic panel, comprising: obtaining real-time voltage data U and real-time current data I of each photovoltaic panel in a target detection area during of the same predetermined period of time; calculate a real-time power P of each of said photovoltaic panels according to said real-time voltage data U and said real-time current data I; by establishing a standard power value PO of the photovoltaic panel in a normal operating state, comparing the real-time power P of each photovoltaic panel with said standard power value PO, and determining whether there is an abnormality in the the operating status of each photovoltaic panel based on the comparison results; wherein when P < PO, it is determined that there is an anomaly in the operating state of said photovoltaic panel; when P > PO, it is determined that no anomaly exists in the operating state of said photovoltaic panel; when an anomaly exists in the operating state of said photovoltaic panel, a real-time alarm is triggered according to the position of said photovoltaic panel in which the anomaly exists.

In certain embodiments of the present application, said presetting of a standard power value PO of a photovoltaic panel in a normal operating state, comprises: obtaining in real time an effective surface S of said photovoltaic panel in the state of normal running ; establish a predetermined photovoltaic panel effective area matrix TO and a predetermined power standard value matrix À. For said predetermined power standard value matrix A, establish A(A1,A2,A3,A4), where Al is a first predetermined power standard value, A2 is a second predetermined power standard value,

A3 is a third standard value of predetermined power, and A4 is a fourth standard value of predetermined power, and where A1 < A2 < A3 < A4;

For said predetermined photovoltaic panel effective surface matrix TO, define

TO(T01,T02,T03,T04), in which TO1 is the first predetermined effective photovoltaic panel area, T02 is the second predetermined effective photovoltaic panel area, T03 is the third predetermined effective photovoltaic panel area, and T04 is the fourth predetermined effective surface of photovoltaic panel, and in which 0 < T01 < T02 < T03 < T04;

A corresponding power standard value is selected as the power standard value PO of said predetermined photovoltaic panel in a normal operating state on the basis of the relationship between S and said predetermined photovoltaic panel effective area matrix TO; when S < TO1, selection of said first predetermined power standard value Al as the standard power value PO of said predetermined photovoltaic panel in a normal operating state; when T01 < S < T02, selection of said second predetermined power standard value

A2 as standard power value PO of said predetermined photovoltaic panel in a normal operating state;

When T02 < S < T03, selection of said third predetermined power standard value

A3 as standard power value PO of said predetermined photovoltaic panel in a normal operating state; when T03 < S < T04, selection of said fourth predetermined power standard value

A4 as said standard power value PO of said predetermined photovoltaic panel in a normal operating state.

In certain embodiments of the present application, said predetermined standard power value PO of the photovoltaic panel in the normal operating state, further comprises: obtaining, in real time, an irradiation intensity K of said panel photovoltaic in normal working state; by defining a predefined irradiation intensity matrix VO and a correction coefficient matrix of the predefined power standard value C. For said correction coefficient matrix of the predefined power standard value C, by defining C(C1, C2,C3,C4), where

C1 is a first predefined power standard value correction coefficient, C2 is a second predefined power standard value correction coefficient, C3 is a third predefined power standard value correction coefficient, C4 is a fourth preset power standard value correction coefficient, and 1 <0.5 is a preset power standard value correction coefficient. correction of the standard value of the power, and 1 < C1 < C2 < C3 < C4 < 1.6; for said preset irradiation intensity matrix VO, setting VO(VO1,V02,V03,V04), where VO1 is the first preset irradiation intensity, VO2 is the second preset irradiation intensity, VO3 is the third preset irradiation intensity, VO4 is the fourth preset irradiation intensity, and VOI <

V0O2 < V03 < VO4;

A corresponding correction factor is selected to correct the power standard value according to the relationship between K and said predefined irradiation intensity matrix

VO;

When K < VOI1, said first correction coefficient of the predetermined power standard value C1 is selected to correct said first predetermined power standard value A1, and the corrected power standard value is A1*C1;

When VOI < K < V02, said second correction coefficient of the predetermined power standard value C2 is selected to correct said second predetermined power standard value A2, and the corrected power standard value is A2*C2;

When VO2 < K < V03, said third correction coefficient of the preset power standard value C3 is selected to correct said third preset power standard value A3, and the corrected power standard value is A3*C3;

When V03 < K < V04, said fourth predetermined power standard value correction coefficient C4 is selected to correct said fourth predetermined power standard value A4, and the corrected power standard value is A4*C4.

In certain embodiments of the present application, when an anomaly exists in the operating state of said photovoltaic panel, this further comprises: obtaining a number N of times that a historical operating state of said photovoltaic panel whose state abnormal operation exists, and classify an alarm of said photovoltaic panel according to said number N; wherein said graduated alarm is classified from top to bottom as a first level abnormal alarm, a second level abnormal alarm and a third level abnormal alarm;

When N < 2, the level of said graduated alarm is said third level abnormality alarm; when 4 > N > 2, the level of said graduated alarm is said second level anomaly alarm; when N > 4, the level of said gradual alarm is said first level anomaly alarm.

In certain embodiments of the present application, said acquisition of real-time voltage data U and real-time current data I of each of said photovoltaic panels in the target detection zone during the same predefined time period, further includes: obtaining the position of each photovoltaic panel in real time.

In order to achieve the above objective, the present invention also provides a system for detecting the operating state of a photovoltaic panel, applied in said method for detecting the operating state of a photovoltaic panel, comprising: an acquisition unit for acquiring the real-time voltage data U and the real-time current data I of each photovoltaic panel in a target detection area during the same predetermined time period; a calculation unit for calculating a real-time power P of each photovoltaic panel according to the real-time voltage data U and the real-time current data I; a processing unit, said processing unit having a standard power value PO of the photovoltaic panel in a predefined normal operating state, said processing unit being used to compare the real-time power P of each photovoltaic panel with said standard value of PO power, and to determine whether there is an abnormality in the working state of each photovoltaic panel according to the comparison result; wherein when P < PO, it is determined that there is an anomaly in the operating state of said photovoltaic panel; when P > PO, it is determined that no anomaly exists in the operating state of said photovoltaic panel; an alarm unit for triggering a real-time alarm according to the location of said photovoltaic panel in which an abnormality exists when the working state of said photovoltaic panel exists.

In certain embodiments of the present application, said obtaining unit is further used to obtain in real time an effective surface S of said photovoltaic panel in a normal operating state;

Said processing unit is preset with a preset photovoltaic panel effective area matrix TO and a preset power standard value matrix A. For said preset power standard value matrix A, A(A1,A2,A3,A4) is defined, in which A1 is a first preset power standard value, A2 is a second preset power standard value, A3 is a third preset power standard value, and

A4 is a fourth preset power standard value, and Al < A2 < A3 < A4; for said predetermined photovoltaic panel effective surface matrix TO, define

TO(T01,T02,T03,T04), in which TO1 is the first predetermined effective surface of the photovoltaic panel, T02 is the second predetermined effective surface of the photovoltaic panel, T03 is the third predetermined effective surface of the photovoltaic panel,

T04 is the fourth predetermined effective photovoltaic panel surface and 0<T01<

T02<T04; A3 is the third predetermined power standard value, A4 is the fourth predetermined power standard value, and AI <A2< A2 T03 < T04;

Said processing unit is further used to select a corresponding power standard value as a power standard value PO of said predetermined photovoltaic panel in a normal operating state on the basis of the relationship between S and said panel effective area matrix predetermined photovoltaic TO;

When S < T01, selection of said first predetermined power standard value Al as the standard power value PO of said predetermined photovoltaic panel in a normal operating state; when T01 < S < T02, selection of said second predetermined power standard value

A2 as said standard power value PO of said predetermined photovoltaic panel in a normal operating state; when T02 < S < T03, selection of said third predetermined power standard value

A3 as standard power value PO of said predetermined photovoltaic panel in a normal operating state; when T03 < S < T04, selection of said fourth predetermined power standard value

A4 as said standard power value PO of said predetermined photovoltaic panel in a normal operating state.

In certain embodiments of the present application, said obtaining unit is further used to obtain, in real time, an irradiation intensity K of said photovoltaic panel in a normal operating state;

Said processing unit is preset with a preset irradiation intensity matrix VO and a correction coefficient matrix of the preset power standard value C. For said correction coefficient matrix of the preset power standard value C,

C(C1,C2,C3,C4) is defined, where C1 is a first preset power standard value correction coefficient, C2 is a second preset power standard value correction coefficient, C3 is a third preset power standard value correction coefficient, preset power standard value correction, C4 is a fourth preset power standard value correction factor, and 1 preset power standard value correction coefficient, and 1 < CI <

C2 < C3 < C4 < 1.6; for said matrix of preset irradiation intensities VO, adjustment of

VO(V01,V02,V03,V04), in which VO1 is the first preset irradiation intensity, VO2 is the second preset irradiation intensity, VO3 is the third preset irradiation intensity, VO4 is the fourth preset irradiation intensity preset irradiation, and VOI < V02 < V03 < VO4;

Said processing unit is further used to select a corresponding correction factor to correct the power standard value based on the relationship between K and said predetermined irradiation intensity matrix VO;

When K < VO1, said first correction coefficient of the preset power standard value C1 is selected to correct said first preset power standard value

A1, and the corrected power standard value is A1*C1;

When VOI < K < V02, said second correction coefficient of the preset power standard value C2 is selected to correct said second preset power standard value A2, and the corrected power standard value is A2*C2;

When VO2 < K < V03, said third correction coefficient of the preset power standard value C3 is selected to correct said third preset power standard value A3, and the corrected power standard value is A3*C3;

When V03 < K < V04, said fourth predetermined power standard value correction coefficient C4 is selected to correct said fourth predetermined power standard value A4, and the corrected power standard value is A4*C4.

In certain embodiments of the present application, said alarm unit is further used to obtain a number N of times that a historical operating state of said photovoltaic panel whose operating state is abnormal exists, and to perform a gradual alarm on said photovoltaic panel as a function of said number N; wherein said gradual alarm is classified from top to bottom as a first level anomaly alarm, a second level anomaly alarm and a third level anomaly alarm;

When N < 2, the level of said graduated alarm is said third level abnormality alarm; when 4 > N > 2, the level of said graduated alarm is said second level anomaly alarm; when N > 4, the level of said gradual alarm is said first level anomaly alarm.

In some embodiments of the present application, said obtaining unit is further used to obtain the position of each photovoltaic panel in real time.

The present invention proposes a method for detecting the operating state of a photovoltaic panel and a detection system, which have a beneficial effect compared to the prior art:

The present invention improves the accuracy of detecting the working state of a photovoltaic panel by obtaining real-time voltage data and real-time current data of each photovoltaic panel in a target detection area during the same preset period of time, and calculating the real-time power of each photovoltaic panel based on the real-time voltage data and real-time current data, which prevents the influence of irradiation intensity solar at different times on the different photovoltaic panels, and increases the accuracy of detecting the operating status of the photovoltaic panels;

Thanks to the operating state of the abnormal photovoltaic panels, the alarm is graduated, which makes it possible to determine the failure rate of the different photovoltaic panels. The higher the level of abnormality of the photovoltaic panels, the greater the scrap rate, which means that they need to be replaced in a timely manner, not only to ensure the use of the photovoltaic panels for their entire service life. life, but also so that the cost is not too high due to the drop in the energy production efficiency of the system.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a flowchart of a method for detecting the operating state of a photovoltaic panel according to one embodiment of the present invention;

Fig. 2 is a functional diagram of a system for detecting the operating state of a photovoltaic panel in one embodiment of the present invention.

DETAILED DESCRIPTION

A more detailed description of a particular embodiment of the invention is given below, in conjunction with the appended drawings and examples of embodiment, the examples which follow serve to explain the invention without limiting its scope. .

In the description of the present application, it is understood that the terms "center", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", etc. "rear", "left", "right", "vertical", "horizontal It is understood that the terms "center", "top", "bottom", "inside", "outside", and other indications of the orientation or position relationships are based on the principles of equal opportunity and fairness. Orientation or position relationships are based on those illustrated in the accompanying drawings and are intended only to facilitate and simplify the description of the present application, and are not intended to indicate or imply that the device or element mentioned must have a particular orientation, be constructed and operate in a particular orientation, and should therefore not be construed as a limitation of this application.

The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical characteristics shown. Therefore, a characteristic defined using the terms "first" and "second" may expressly or implicitly include one or more of these characteristics. In the description of this application, unless otherwise indicated, "more than one" means two or more.

In the description of this application, it should be noted that, unless expressly specified and limited, the terms "mounted", "connected", "connected" must be understood in the broad sense, that is to say that they can be "mounted", "connected" or "linked". For example, it can be a fixed connection, a removable connection or a one-piece connection; it can be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, or it may be a connection between the internal faces of two elements. To a person of ordinary skill in the art, the specific meaning of the aforementioned terms in this application may be understood in particular cases.

Current technology, the current photovoltaic power plant is composed of a large number of photovoltaic panels with the same specifications, due to the large number of photovoltaic panels, so it is not possible to detect the working status of each photovoltaic panel one by one. Traditional detection of most inspections relies on maintenance personnel to inspect each PV panel, leading to delays and lack of accuracy, among others.

Therefore, the present invention provides a method for detecting the working state of a photovoltaic panel and a detection system, calculating the power value of each photovoltaic panel by obtaining the voltage and current of each photovoltaic panel in the zone, and determining whether there is an abnormality in the working state of the photovoltaic panels on the basis of a comparison between the power value and the standard value to determine whether there is an abnormality in the working state of the solar panel. The power value is compared with the standard value to determine whether there is an abnormality in the working state of photovoltaic panels, thereby improving the detection efficiency of large-area photovoltaic panels in a photovoltaic power plant. , and improves on the traditional labor-based form of panel detection.

With reference to FIG. 1, a disclosed embodiment of the present invention provides a method for detecting the working state of a photovoltaic panel, comprising: obtaining real-time voltage data U and real-time current data I of each photovoltaic panel in a target detection area within the same predetermined time period calculate a real-time power P of the respective photovoltaic panel on the basis of the real-time voltage data U and the real-time current data I ; by setting the PO power standard value of photovoltaic panels in a normal working state, comparing the real-time power P of each photovoltaic panel with the PO power standard value, and determining whether there is an abnormality in the the operating status of each photovoltaic panel based on the comparison results; in which

When P < PO, it is determined that there is an abnormality in the working state of the photovoltaic panel;

When P > PO, it is determined that there is no abnormality in the working state of the photovoltaic panel;

When an abnormality exists in the working status of photovoltaic panels, a real-time alarm is provided based on the location of the photovoltaic panel in which the abnormality exists.

The beneficial effect is as follows: through automated control, the voltage and current of each photovoltaic panel are detected in the same preset time period, the real-time power of each photovoltaic panel is determined, and the comparison between the power in real time and the preset power standard value can effectively determine whether each photovoltaic panel is in an abnormal operating state, and effectively realize comprehensive and integrated detection of photovoltaic panels over a large area of a region. The detection efficiency is improved.

In a specific embodiment of the present application, the presetting of the standard power value PO of the photovoltaic panel in the normal operating state comprises: obtaining in real time an effective surface S of the photovoltaic panel in the normal operating state; to predefine a predefined effective surface matrix TO of the photovoltaic panel and a predefined power standard value matrix A. For the predefined power standard value matrix A, we define A(A1,A2,A3,A4), where Al is a first predefined power standard value, A2 is a second predefined power standard value, A3 is a third predefined power standard value, and A4 is a fourth predefined power standard value, and Al < A2 < A3 < A4; for the predefined standard power value matrix of the photovoltaic panel, we define A(A1,A2,A3,A4). predetermined photovoltaic panel effective area matrix TO, TO(T01,T02,T03,T04) is defined, in which

TO1 is a first predetermined effective photovoltaic panel surface, T02 is a second predetermined photovoltaic panel effective surface, T03 is a third predetermined photovoltaic panel effective surface, and T04 is a fourth predetermined photovoltaic panel effective surface, and in which 0 < T01 < T02 < T03 <

T04:

A corresponding power standard value is selected as the power standard value PO of the predetermined photovoltaic panel in the normal operating state, on the basis of the relationship between S and the effective area matrix TO of the predetermined photovoltaic panel;

When S < T01, a first predetermined power standard value A1 is selected as the power standard value PO of the predetermined photovoltaic panel in the normal operating state;

When T01 < S < T02, selection of a second predetermined standard power value

A2 as standard PO power value of the predetermined photovoltaic panel in the normal operating state;

When T02 < S < T03, a third predetermined power standard value A3 is selected as the power standard value PO of the predetermined photovoltaic panel in the normal operating state;

When T03 < S < T04, a fourth preset power standard value A4 is selected as the power standard value PO of the preset photovoltaic panel in the normal working state.

In a specific embodiment of the present application, the presetting of a standard power value PO of the photovoltaic panel in the normal operating state, further comprises: obtaining, in real time, an intensity of K irradiation of the photovoltaic panel in the normal working state;

Predetermine a predefined irradiation intensity matrix VO and a correction coefficient matrix of the predefined power standard value C. For the correction coefficient matrix of the predefined power standard value C, set C(C1,C2, C3,C4), where C1 is a first correction coefficient of the predefined power standard value, C2 is a second correction coefficient of the predefined power standard value, C3 is a third correction coefficient of the predefined power standard value , C4 is a fourth correction coefficient of the predefined power standard value, and 1 <C1 < C4) is a correction coefficient of the predefined power standard value. correction coefficient, and 1 < C1 < C2 < C3 < C4 < 1.6; for predefined irradiation intensity matrix

VO, set VO (VO1,V02,V03,V04), where VO1 is the first preset irradiation intensity, VO2 is the second preset irradiation intensity, VO3 is the third preset irradiation intensity, VO4 is the fourth intensity predefined irradiation, and VO1 < V0O2 < V03 < V04;

A corresponding correction coefficient is selected to correct the power standard value on the basis of the relationship between K and the preset irradiation intensity matrix VO;

When K < VOI, a first correction coefficient of the predefined power standard value C1 is selected to correct the first predefined power standard value

A1, and the corrected power standard value is A1*C1;

When VOI < K < V02, a second correction coefficient of the preset power standard value C2 is selected to correct the second preset power standard value A2, and the corrected power standard value is A2*C2;

When VO02 < K < V03, a third correction coefficient of the preset power standard value C3 is selected to correct the third preset power standard value A3, and the corrected power standard value is A3*C3;

When V03<K < V04, the fourth correction coefficient of the preset power standard value C4 is selected to correct the fourth preset power standard value

A4, and the corrected power standard value is A4*C4.

The beneficial effect is as follows: obtaining the real-time voltage data and real-time current data of each photovoltaic panel in the target detection area during the same preset period, and calculating the power in time actual of each photovoltaic panel based on real-time voltage data and real-time current data, the changes in solar radiation intensity and effective area under the influence of different environments due to the existence different time intervals are excluded, thereby improving the detection efficiency and detection accuracy of the working state of photovoltaic panels. The efficiency of detection is improved, as is the accuracy of detecting the operating state of the photovoltaic panels.

In a specific embodiment of the present application, when the operating state of the photovoltaic panel is abnormal, it is further a matter of: obtaining a number N of times that a historical operating state of the photovoltaic panel whose operating state is abnormal exists, and classify an alarm on the photovoltaic panel according to the number N; in which the classified alarm is ranked from high to low. the graduated alarm is classified from high to low as first-level abnormal alarm, second-level abnormal alarm and third-level abnormal alarm;

When N < 2, the grade of the graduated alarm is a third level anomaly alarm;

When 4 > N > 2, the prioritized alarm is classified as a secondary anomaly alarm;

When N > 4, the prioritized alarm level is a first-class abnormality alarm.

The beneficial effect is as follows: by classifying the alarms on photovoltaic panels with anomalies in their operating state, thus determining the failure rate of different photovoltaic panels, the higher the level of abnormality of the photovoltaic panels, the higher their obsolescence rate is high, and therefore, they also need to be replaced in a timely manner, which not only ensures the lifespan of the cost of using photovoltaic panels, but also does not lead to a decrease in the efficiency of the system's electricity production due to too much consideration of cost.

In a specific embodiment of the present application, acquiring real-time voltage data U and real-time current data I of each photovoltaic panel in the detection area of the target during the same period of predetermined time, further comprises: obtaining the position of each photovoltaic panel in real time.

Based on the same technical idea, with reference to Figure 2, the present invention also proposes a system for detecting the operating state of a photovoltaic panel, applied in a method for detecting the operating state of a photovoltaic panel. a photovoltaic panel, comprising: an acquisition unit for acquiring the real-time voltage data U and the real-time current data I of each photovoltaic panel in a target detection area during the same predetermined time period ;

A calculation unit for calculating a real-time power P of each photovoltaic panel on the basis of the real-time voltage data U and the real-time current data I;

A processing unit, a power standard value PO of the photovoltaic panel in a normal operating state is preset in the processing unit, and the processing unit is used to compare the real-time power P of the respective photovoltaic panel with the PO power standard value, and to determine whether there is an abnormality in the working state of the respective photovoltaic panel based on the comparison results; in which

When P < PO, it is determined that there is an abnormality in the working state of the photovoltaic panel; when P > PO, it is determined that there is no abnormality in the working state of the photovoltaic panel;

An alarm unit for conducting real-time alarm based on the location of the photovoltaic panel in which the abnormality exists when the working state of the photovoltaic panel exists.

The beneficial effect is as follows: through the system-based automation device, the voltage and current of each photovoltaic panel in the same preset time period are detected, and the real-time power of each photovoltaic panel is determined , and the real-time power can be compared with the preset standard value of the power according to the real-time power, so that it is possible to effectively determine whether each photovoltaic panel is in an abnormal working state, and it is possible to effectively carry out a comprehensive and integrated inspection of photovoltaic panels over a large area in the region. It can carry out comprehensive and integrated detection of photovoltaic panels over a wide area of the region and improve detection efficiency.

In a specific embodiment of the present application, the acquisition unit is also used to acquire in real time an effective surface S of the photovoltaic panel in a normal operating state;

The processing unit is preset with a predetermined photovoltaic panel effective area matrix TO and a predetermined power standard value matrix

A. For the predetermined power standard value matrix A, A(A1,A2,A3,A4) is defined, in which Al is a first predetermined power standard value, A2 is a second predetermined power standard value, A3 is a third standard value of predetermined power, and A4 is a fourth standard value of predetermined power, and Al <A2<A3<A4. ; For the predetermined photovoltaic panel effective area matrix TO, TO(T01,T02,T03,T04) is defined, in which TO1 is the first predetermined photovoltaic panel effective area, T02 is the second predetermined photovoltaic panel effective area, TO03 is the third predetermined effective area of photovoltaic panel, and T04 is the fourth predetermined effective area of photovoltaic panel, and in which 0 < T01 < T02 < T03 < T04;

The processing unit is also used to select a corresponding power standard value as the power standard value PO of the predetermined photovoltaic panel in a normal operating state based on the relationship between S and the effective area matrix of the panel predetermined photovoltaic TO;

When S < T01, the first predetermined power standard value Al is selected as the power standard value PO of the predetermined photovoltaic panel in the normal operating state;

When T01 < S < T02, selection of a second predetermined standard power value

A2 as the PO power standard value of the predetermined photovoltaic panel in the normal operating state;

When T02 < S < T03, a third predetermined power standard value A3 is selected as the standard power value PO of the predetermined photovoltaic panel in the normal operating state;

When T03 < S < T04, a fourth preset power standard value A4 is selected as the power standard value PO of the preset photovoltaic panel in the normal working state.

In a specific embodiment of the present application, the acquisition unit is also used to acquire, in real time, the irradiation intensity K of the photovoltaic panel in a normal operating state;

A preset irradiation intensity matrix VO and a preset power standard value correction coefficient matrix C are preset in the processing unit, and for the preset power standard value correction coefficient matrix C ,

C(C1,C2,C3,C4) is defined, wherein C1 is a first preset power standard value correction coefficient, C2 is a second preset power standard value correction coefficient, C3 is a third coefficient of preset power standard value correction, and C4 is a fourth preset power standard value correction factor, and 1 < 1.5 of power standard value correction, and 1 < CI <

C2 < C3 < C4 < 1.6; for the predefined irradiation intensity matrix VO, set

VO(V01,V02,V03,V04), in which VO1 is the first predefined irradiation intensity, VO2 is the second predefined irradiation intensity, VO3 is the third predefined irradiation intensity, VO4 is the fourth predefined irradiation intensity predefined irradiation, and VO1 < V0O2 < V03 < V04;

The processing unit is also used to select a corresponding correction coefficient to correct the power standard value based on the relationship between K and the predetermined irradiation intensity matrix VO;

When K < VO1, the first correction coefficient of the predetermined power standard value C1 is selected to correct the first predetermined power standard value A1, and the corrected power standard value is A1*C1;

When VO1 < K < V02, a second correction coefficient of the predetermined power standard value C2 is selected to correct the second predetermined power standard value A2, and the corrected power standard value is A2*C2;

When VO02 < K < V03, a third correction coefficient of the preset power standard value C3 is selected to correct the third preset power standard value A3, and the corrected power standard value is A3*C3;

When V03<K < V04, the fourth correction coefficient of the preset power standard value C4 is selected to correct the fourth preset power standard value

A4, and the corrected power standard value is A4*C4.

The beneficial effect is as follows: obtaining the real-time voltage data and real-time current data of each photovoltaic panel in the target detection area during the same preset period, and calculating the power in time actual of each photovoltaic panel based on real-time voltage data and real-time current data, the changes in solar radiation intensity and effective area under the influence of different environments due to the existence different time intervals are excluded, which improves the detection efficiency and the accuracy of detecting the working state of photovoltaic panels. It also improves the accuracy of detecting the working status of photovoltaic panels.

In a specific embodiment of the present application, the alarm unit is also used to obtain the number of times N that the historical operating state of the photovoltaic panel whose operating state is abnormal exists, and to perform a gradual alarm on the photovoltaic panel depending on the number of times N; in which the gradual alarm is classified from high to low according to the abnormal working state. the gradual alarm is classified from high to low as first-level abnormality alarm, second-level abnormality alarm and third-level abnormality alarm;

When N < 2, the degree of the graduated alarm is a third degree anomaly alarm;

When 4 > N > 2, the prioritized alarm is classified as a secondary abnormality alarm;

When N > 4, the level of the prioritized alarm is a first degree abnormality alarm.

The beneficial effect is that: by classifying the alarms on photovoltaic panels whose operating state has anomalies, so as to determine the failure rate of different photovoltaic panels, the higher the level of abnormality of the photovoltaic panels, the higher their scrap rate, and therefore, they also need to be replaced in a timely manner, which not only ensures that the life cost of photovoltaic panels is used, but also does not lead to a decrease in the efficiency of the system's energy production due to too much consideration of cost.

In a specific embodiment of the present application, the acquisition unit is also used to obtain the position of each photovoltaic panel in real time.

According to the first technical design of the present invention, the present invention detects the voltage and current of each photovoltaic panel in the same preset time period by means of a system-based automation device, determines the power in real time of each photovoltaic panel, and by comparing the real-time power with the preset power standard value, it can effectively determine whether each photovoltaic panel is in an abnormal working state, and can effectively carry out comprehensive and integrated detection of photovoltaic panels on a large area of a region, thus improving the detection of photovoltaic panels. Comprehensive and integrated detection is realized and detection efficiency is improved.

According to the second technical design of the present invention, it calculates the standard power value of all photovoltaic panels according to the effective area and irradiation intensity of different photovoltaic panels in a normal operating state, excluding the change of effective area under the influence of solar radiation intensity as well as different environments due to the difference in the time interval of human inspection, which improves the detection efficiency and at the same time time the accuracy of detecting the operating state of photovoltaic panels. It improves the inspection efficiency and detection accuracy of the working status of photovoltaic panels.

In summary, the present invention improves the accuracy of detecting the working state of a photovoltaic panel by obtaining the real-time voltage data and real-time current data of each photovoltaic panel in a target detection area. during the same preset period of time, and calculating the real-time power of each photovoltaic panel based on the real-time voltage data and real-time current data, preventing the influence of the intensity of the solar irradiation at different times on each photovoltaic panel, and improving the accuracy of detecting the operating state of the photovoltaic panel;

By classifying alarms for photovoltaic panels with abnormal operating status, the failure rate of different photovoltaic panels can be determined, and the higher the abnormality level of photovoltaic panels, the higher their obsolescence rate, and therefore, they also need to be replaced in time, which not only ensures the lifespan of the usage cost of photovoltaic panels, but also does not lead to the decrease of the energy production efficiency of the system due to excessive consideration of cost; it also improves the real-time location of defective photovoltaic panels, and improves the accuracy of detecting the operating status of photovoltaic panels. The present invention has the advantages of high efficiency, high precision and real-time automation for obtaining photovoltaic panels under abnormal operating conditions.

The above description is only an exemplary embodiment of the present invention, but it cannot be used to limit the scope of the present invention, and any structural modification made in accordance with the present invention must be considered as falling within the scope of the present invention. the scope of protection of the present invention as long as it does not lose the essence of the present invention and is subject to constraints.

Technicians can clearly understand that, for the sake of convenience and conciseness of description, the specific working process of the above-described system and the corresponding description may refer to the corresponding process in the above-mentioned embodiment, and will not be not repeated in this document.

It should be noted that the system provided by the above embodiments is only illustrated as an example with the division of each of the functional modules described above, and in the actual application, the functions described above can be assigned to different functional modules depending on the needs, that is, the modules or steps in the embodiments of the present invention can be decomposed or combined, for example, the modules of the modes embodiments described above can be merged into a single module, or they can be divided into a plurality of sub-modules, in order to accomplish all or part of the functions described above. Modules can be merged into a single module or divided into several sub-modules, in order to perform all or part of the functions described above. The names of the modules and steps involved in embodiments of the present invention are merely intended to distinguish the modules or steps and are not intended to be an improper limitation of the present invention.

Persons skilled in the art should be able to appreciate that the modules, method steps of the examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two, and that the programs corresponding to the software modules, to the steps of the method, can be placed in random memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically programmable ROM erasable, registers, hard disks, removable disks, CD-ROMs, or any other form of storage media known in the art, ROM, memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM , registers, hard disks, removable disks, CD-ROMs, or any other form of storage media known in the art. In order to clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of the examples have been described in the foregoing description in general terms according to their function. Whether these functions are performed in electronic hardware or software depends on the particular application and the design constraints of the technical solution. A person skilled in the art may use different methods to implement the functions described for each particular application, but such implementations should not be considered outside the scope of the present invention.

The term "including" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, equipment, device, which includes a series of elements, includes not only the aforementioned items, but also other items that are not explicitly listed.

Heretofore, the technical solutions of the present invention have been described in connection with the preferred embodiments illustrated in the accompanying drawings, but those skilled in the art will readily understand that the extent of protection of the present invention is obviously not limited to these specific embodiments. Without deviating from the principles of the present invention, those skilled in the art may make equivalent modifications or substitutions to the relevant technical characteristics, and the technical solutions after these modifications or substitutions will fall within the scope of protection of the present invention.

The foregoing is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims (10)

1. Method for detecting the operating state of a photovoltaic panel, characterized in that it consists of obtaining the real-time voltage data U and the real-time current data I of each photovoltaic panel in a target detection area during the same predetermined period of time, calculating a real-time power P of each photovoltaic panel according to the real-time voltage data U and the real-time current data I, by setting a standard value of power PO of the photovoltaic panel in a normal operating state, by comparing the real-time power P of each photovoltaic panel with said standard value of power PO, and determining whether there is an abnormality in the operating state of each photovoltaic panel on the basis of the comparison results, wherein when P < PO, it is determined that there is an abnormality in the operating state of said photovoltaic panel, when P > PO, it is determined that no abnormality exists exists in the operating state of said photovoltaic panel, when an anomaly exists in the operating state of said photovoltaic panel, a real-time alarm is triggered depending on the position of said photovoltaic panel in which the anomaly exists. 2. Method for detecting the operating state of a photovoltaic panel according to claim 1, characterized in that said predefinition of a standard power value PO of said photovoltaic panel in a normal operating state, comprises: obtaining in real time of an effective surface S of said photovoltaic panel in the normal operating state, establish a predetermined photovoltaic panel effective surface matrix TO and a predetermined power standard value matrix À. For said predetermined power standard value matrix A, establish A(A1,A2,A3,A4), where Al is a first predetermined power standard value, A2 is a second predetermined power standard value, A3 is a third standard value of predetermined power, and A4 is a fourth standard value of predetermined power, and where Al < A2 < A3 < A4; For said predetermined photovoltaic panel effective area matrix TO, define TO(T01,T02,T03,T04), in which TO1 is the first predetermined photovoltaic panel effective area, T02 is the second predetermined photovoltaic panel effective area, T03 is the third predetermined photovoltaic panel effective area, and T04 is the fourth predetermined photovoltaic panel effective area, and in which O0 < T01 < T02 < T03 < T04, A corresponding power standard value is selected as the power standard value PO of said predetermined photovoltaic panel in a normal operating state based on the relationship between S and said predetermined photovoltaic panel effective area matrix TO, when S < TO1, selecting said first predetermined power standard value Al as a standard value of power PO of said predetermined photovoltaic panel in a normal operating state, when T01 < S < T02, selection of said second standard value of predetermined power A2 as standard value of power PO of said predetermined photovoltaic panel in a normal operating state, When T02 < S < T03, selection of said third predetermined power standard value A3 as the standard power value PO of said predetermined photovoltaic panel in a normal operating state, when T03 < S < T04, selection of said fourth standard value of predetermined power A4 as said standard power value PO of said predetermined photovoltaic panel in a normal operating state. 3. Method for detecting the operating state of a photovoltaic panel according to claim 2, characterized in that said presetting of the standard power value PO of the photovoltaic panel in the normal operating state, further comprises: obtaining in real time an irradiation intensity K of said photovoltaic panel in the normal operating state; establish a predefined irradiation intensity matrix VO and a correction coefficient matrix of the predefined power standard value C, For said correction coefficient matrix of the predefined power standard value C, establish C(C1,C2, C3,C4), where C1 is a first predefined power standard value correction coefficient, C2 is a second predefined power standard value correction coefficient, C3 is a third power standard value correction coefficient predefined, C4 is a fourth predefined power standard value correction coefficient, and 1 <0.5 is a predefined power standard value correction coefficient, power standard value correction coefficient, and 1 <C1 < C2 < C3 < C4 < 1.6, for said preset irradiation intensity matrix VO, setting of VO (VO1, V02, V03, V04), where VOI is the first preset irradiation intensity, VO2 is the second preset irradiation intensity, VO3 is the third preset irradiation intensity, VO4 is the fourth preset irradiation intensity, and VOI < VO2 < V03 < V04, A corresponding correction factor is selected to correct the standard value power according to the relationship between K and said predefined irradiation intensity matrix vo, When K < V01, said first correction coefficient of the predetermined power standard value C1 is selected to correct said first power standard value completed predetermined Al, and the corrected power standard value is A1*C1, When VO1 S& K < V02, said second correction coefficient of the predetermined power standard value C2 is selected to correct said second predetermined power standard value A2, and the corrected power standard value is A2*C2, When V02 S K < V03, said third correction coefficient of the preset power standard value C3 is selected to correct said third preset power standard value A3, and the corrected power standard value is A3*C3, When V03 < K < V04, said fourth predetermined power standard value correction coefficient C4 is selected to correct said fourth predetermined power standard value A4, and the corrected power standard value is A4*C4. 4. Method for detecting the operating state of a photovoltaic panel according to claim 1, characterized in that, when the operating state of said photovoltaic panel exists abnormally, it further comprises: obtaining a number N of once a historical operating state of said photovoltaic panel whose operating state exists abnormally exists, and classifying an alarm on said photovoltaic panel according to said number N, in which said graduated alarm is classified from top to bottom as an abnormal alarm first level, a second level abnormal alarm and a third level abnormal alarm, When N < 2, the level of said graduated alarm is said third level abnormality alarm, when 4 > N > 2, the level of said graduated alarm is said second level anomaly alarm, when N > 4, the level of said gradual alarm is said first level anomaly alarm. 5. Method for detecting the operating state of a photovoltaic panel according to claim 1, characterized in that said acquisition of real-time voltage data U and real-time current data I of each photovoltaic panel in a target detection area during the same predetermined time period, further comprises: obtaining a position of each photovoltaic panel in real time. 6. A system for detecting the operating state of a photovoltaic panel, applied in a method for detecting the operating state of a photovoltaic panel as claimed in any one of claims 1 to 5, characterized in that it comprises: a unit for acquiring real-time voltage data U and real-time current data I of each photovoltaic panel in a target detection zone during the same predetermined period of time, a calculation unit for calculating a real-time power P of each photovoltaic panel according to the real-time voltage data U and the real-time current data I, a processing unit, said processing unit having a standard value of power PO of the photovoltaic panel in a predefined normal operating state, said processing unit being used to compare the real-time power P of each photovoltaic panel with said standard value of power PO, and to determine whether there is an abnormality in the operating state of each photovoltaic panel according to the comparison result, in which when P < PO, it is determined that there is an anomaly in the operating state of said photovoltaic panel, when P > PO, it is determined that no abnormality exists in the operating state of said photovoltaic panel, an alarm unit for triggering an alarm in real time based on the location of said photovoltaic panel in which an abnormality exists when the state of operation of said photovoltaic panel exists. 7. System for detecting the operating state of a photovoltaic panel according to claim 6, characterized in that the acquisition unit is used to acquire in real time an effective surface S of the photovoltaic panel in an operating state normal, Said processing unit is preset with a preset effective surface matrix TO of the photovoltaic panel and a preset power standard value matrix A, For said preset power standard value matrix A, we define A(A1,A2,A3 ,A4), where Al is a first preset power standard value, A2 is a second preset power standard value, A3 is a third preset power standard value, and A4 is a fourth preset power standard value, and Al < A2 <A3 <A4; for said predetermined photovoltaic panel effective area matrix TO, define TO(T01,T02,T03,T04), in which TO1 is the first predetermined photovoltaic panel effective area, T02 is the second predetermined photovoltaic panel effective area, T03 is the third predetermined effective surface of the photovoltaic panel, T04 is the fourth predetermined effective surface of the photovoltaic panel and O<T01 <T02<T04; A3 is the third predetermined power standard value, A4 is the fourth predetermined power standard value, and Al <A2<A2 T03 < T04, Said processing unit is further used to select a corresponding power standard value as a value power standard PO of said predetermined photovoltaic panel in a normal operating state on the basis of the relationship between S and said predetermined photovoltaic panel effective area matrix TO, When S < T01, selection of said first predetermined power standard value Al as standard power value PO of said predetermined photovoltaic panel in a normal operating state, when T01 < S < T02, selection of said second predetermined power standard value A2 as said standard power value PO of said predetermined photovoltaic panel in a state of normal operation, When T02 < S < T03, selection of said third predetermined power standard value A3 as the standard power value PO of said predetermined photovoltaic panel in a normal operating state, when T03 < S < T04, selection of said fourth predetermined power standard value A4 as said power standard value PO of said predetermined photovoltaic panel in a normal operating state. 8. System for detecting the operating state of a photovoltaic panel according to claim 7, characterized in that the acquisition unit is further used to acquire in real time the irradiation intensity K of said photovoltaic panel in a normal operating state, said processing unit is preset with a preset irradiation intensity matrix VO and a preset power standard value correction coefficient matrix C, For said value correction coefficient matrix preset power standard C, we set C(C1,C2,C3,C4), where Cl is a first correction coefficient of the preset power standard value, C2 is a second correction coefficient of the preset power standard value, C3 is a third correction coefficient of the preset power standard value, C4 is a fourth correction coefficient of the preset power standard value, and 1 < CI < C2 < C3 < C4 < 1.6, for said matrix of preset irradiation intensities VO, setting VO(V01, V02,V03,V04), in which VO1 is the first preset irradiation intensity, VO2 is the second preset irradiation intensity, VO3 is the third irradiation intensity preset, VO4 is the fourth preset irradiation intensity, and VOI < VO2 < V03 < VO4, Said processing unit is also used to select a corresponding correction coefficient to correct the power standard value based on the relationship between K and said predetermined irradiation intensity matrix VO, When K < VO1, said first correction coefficient of the predetermined power standard value C1 is selected to correct said first predetermined power standard value A1, and the power standard value corrected is A1*C1, When VOI < K < V02, said second correction coefficient of the predetermined power standard value C2 is selected to correct said second predetermined power standard value A2, and the corrected power standard value is A2*C2 , When VO2 < K < V03, said third correction coefficient of the preset power standard value C3 is selected to correct said third preset power standard value A3, and the corrected power standard value is A3*C3, When V03 < K < V04, said fourth predetermined power standard value correction coefficient C4 is selected to correct said fourth predetermined power standard value A4, and the corrected power standard value is A4*C4. 9. System for detecting the operating state of a photovoltaic panel according to claim 6, characterized in that the alarm unit is also used to obtain the number N of times that the operating state of the photovoltaic panel whose operating state is abnormal exists in the history, and to perform a gradual alarm for said photovoltaic panel according to said number N, in which said gradual alarm is classified from top to bottom as a first level anomaly alarm , a second level anomaly alarm and a third level anomaly alarm, When N < 2, the level of said graduated alarm is said third level abnormality alarm, when 4 > N > 2, the level of said graduated alarm is said second level anomaly alarm, when N > 4, the level of said graduated alarm is said first level anomaly alarm. 10. System for detecting the operating state of a photovoltaic panel according to claim 6, characterized in that said acquisition unit is further used to acquire the position of each photovoltaic panel in real time.