CN217741675U

CN217741675U - Photovoltaic electric field fault detection device

Info

Publication number: CN217741675U
Application number: CN202221998962.7U
Authority: CN
Inventors: 李刚刚; 苏小春; 刘家朋; 李琼
Original assignee: Sdic Gansu New Energy Co ltd
Current assignee: Sdic Gansu New Energy Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-04
Anticipated expiration: 2032-07-29

Abstract

The utility model provides a photovoltaic electric field fault detection device belongs to photovoltaic power generation technical field. The photovoltaic module detection device comprises a detection circuit, wherein a ceramic resistor is connected to the detection circuit in parallel, circuit breakers are connected to two ends of the detection circuit, and the circuit breakers are connected with two ends of a single photovoltaic module or a plurality of photovoltaic modules connected in series through plugs. Two ends of the ceramic resistor are connected with the voltmeter in parallel, and one side of the ceramic resistor is connected with the ammeter in series. The utility model discloses fault detection device can use ceramic resistor as the load, carries out troubleshooting to monolithic or polylith photovoltaic module, through gathering load both ends voltage and through its electric current to compare with standard voltage and electric current, judge the position of trouble subassembly.

Description

Photovoltaic electric field fault detection device

Technical Field

The utility model belongs to the technical field of the photovoltaic power generation technique and specifically relates to a photovoltaic electric field fault detection device is related to.

Background

When floating dust, bird droppings, sheltering and hot spots exist on the surface of the photovoltaic module, the power generation capacity of the photovoltaic module is seriously influenced, and meanwhile, the burning loss of the polycrystalline silicon single chip of the photovoltaic module can be caused.

When a photovoltaic electric field fails, individual failed photovoltaic modules are searched and determined in large-area photovoltaic modules, a large amount of time is spent on one-by-one troubleshooting, so that the positions of the failed photovoltaic modules are determined, and the processing efficiency of the failure is influenced.

Because the photovoltaic modules are connected in series, the voltage and current output of the whole loop can be seriously influenced by the fault of a single photovoltaic module according to the barrel effect, and the power generation efficiency of the whole photovoltaic electric field is further influenced.

In view of the above, the utility model provides a photovoltaic electric field fault detection device to solve above-mentioned technical problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photovoltaic electric field fault detection device, this fault detection device can use ceramic resistor as the load, carries out troubleshooting to monolithic or polylith photovoltaic module, through gathering load both ends voltage and through its electric current to compare with standard voltage and electric current, judge the position of trouble subassembly.

The utility model provides a photovoltaic electric field fault detection device, include: the detection circuit is connected with the ceramic resistor in parallel, two ends of the detection circuit are connected with circuit breakers, and the circuit breakers are connected with two ends of a single photovoltaic assembly or a plurality of photovoltaic assemblies connected in series through plugs.

Preferably, two ends of the ceramic resistor are connected with a voltmeter in parallel.

Preferably, an ammeter is connected in series with one side of the ceramic resistor.

Preferably, the number of the ceramic resistors is three, and the ceramic resistors are coupled to the detection circuit, and the resistance values of the ceramic resistors are different.

Preferably, the voltmeter is a multimeter.

Preferably, the ammeter is a clamp ammeter, and the plug is an MC type plug.

Preferably, a temperature sensor is arranged on the surface or one side of the ceramic resistor, and the temperature sensor is electrically connected with the temperature display.

Preferably, a cooling fan is further disposed on one side of the ceramic resistor.

Preferably, a switch of the cooling fan is connected with the temperature sensor, and the cooling fan is turned on when the temperature detected by the temperature sensor is not lower than 45 ℃; when the temperature detected by the temperature sensor is not higher than 25 ℃, the cooling fan is turned off.

Preferably, the ceramic resistor, the temperature sensor and the cooling fan are disposed inside a device case, and the circuit breaker and the temperature display are disposed outside the device case.

The technical scheme of the utility model through using ceramic resistor as the load, be connected with monolithic or polylith photovoltaic module through circuit breaker and plug and carry out troubleshooting, load both ends voltage and the electric current through it are gathered to the accessible to compare with the electric current size under standard voltage and the same illumination condition, voltage exists obviously unusually, and the electric current is less than standard current value or does not have the current value, can judge the photovoltaic module trouble.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a wiring schematic diagram of a first embodiment of the present invention;

fig. 2 is a wiring schematic diagram of a second embodiment of the present invention.

Description of the reference numerals:

1: a detection circuit; 2: a photovoltaic module; 3. 301, 302, 303: a ceramic resistor; 4: a circuit breaker; 5: a plug; 6. 601, 602, 603: a voltmeter; 7. 701, 702, 703: an ammeter; 8: a device housing; 9: a temperature sensor; 10: a temperature display; 11: and cooling the fan.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1, the utility model provides a photovoltaic electric field fault detection device, including detection return circuit 1, connect ceramic resistor 3 as the load on the detection return circuit 1, the both ends of detection return circuit 1 have connect circuit breaker 4, and circuit breaker 4 meets through the both ends of plug 5 with the photovoltaic module 2 that monoblock or polylith concatenated.

Two ends of the ceramic resistor 3 are connected with a voltmeter 6 in parallel and used for measuring actual voltage at the two ends of the ceramic resistor 3, one side of the ceramic resistor 3 is connected with an ammeter 7 in series, and the actual current value passing through the ceramic resistor 3 can be measured through the ammeter 7.

By taking the ceramic resistor 3 as a load and connecting the ceramic resistor 3 with a single photovoltaic module or a plurality of photovoltaic modules through the breaker 4 and the plug 5 for troubleshooting, the voltage at two ends of the ceramic resistor 3 of the load and the current passing through the ceramic resistor can be collected and compared with the standard voltage and the standard current under the same illumination condition, and when the actual voltage is obviously abnormal and the actual current is smaller than the standard current value or has no current value, whether the photovoltaic module has a fault or not and the fault position can be judged.

Example two

As shown in fig. 2, in this embodiment, three

ceramic resistors

301, 302 and 303 are connected in parallel to the detection circuit 1 as loads, two ends of the detection circuit 1 are connected with circuit breakers 4, and the circuit breakers 4 are connected with two ends of a single or multiple photovoltaic modules 2 connected in series through plugs 5.

In this embodiment, the three

ceramic resistors

301, 302 and 303 are 7 Ω, 70 Ω and 140 Ω respectively, and the detection circuit 1 is 4mm ² The single-core cable is connected with each ceramic resistor, the breaker 4 is direct-current 32A, and the load current and the outlet voltage of the photovoltaic modules of a single block, 10 blocks and 20 blocks can be tested through the three

ceramic resistors

301, 302 and 303 respectively. Whether the photovoltaic module has the problems of preventing reverse diode faults and whether single-chip polycrystalline silicon and multiple pieces of polycrystalline silicon have the problems of line breakage and burning loss is judged through test detection.

In this embodiment, two ends of the

ceramic resistors

301, 302, 303 are connected in parallel to the

voltmeters

601, 602, 603, respectively, for measuring actual voltages at the two ends of the

ceramic resistors

301, 302, 303, and the branches where the

ceramic resistors

301, 302, 303 are located are connected in series to the

ammeters

701, 702, 703, respectively, so that actual current values passing through the

ceramic resistors

301, 302, 303 can be measured by the

ammeters

701, 702, 703. The

voltmeters

601, 602 and 603 adopt a universal meter to measure voltage values, and the

ammeters

701, 702 and 703 are clamp-type ammeters used for measuring currents. In the present embodiment, the plug 5 is an MC type plug.

In this embodiment, each of the

ceramic resistors

301, 302, 303 is disposed in the device housing 8, and a temperature sensor 9 is disposed on one side or surface of the ceramic resistor, and the temperature sensor 9 is electrically connected to the temperature display 10 for displaying the internal temperature of the device housing 9. The other side of the

ceramic resistors

301, 302, 303 is also provided with a cooling fan 11, and the cooling fan 11 is located inside the device housing 8. The circuit breaker 4 and the temperature display 10 are disposed outside the device housing 8.

A switch of the cooling fan 11 is connected with the temperature sensor 9, and when the detection temperature of the temperature sensor 9 is not lower than 45 ℃, the cooling fan 11 is turned on to dissipate heat and reduce temperature; when the detected temperature of the temperature sensor 9 falls to not higher than 25 ℃, the cooling fan 11 is turned off.

In the embodiment, a plurality of

ceramic resistors

301, 302 and 303 connected in parallel are used as loads, and are connected with a single

photovoltaic module

8, 10 photovoltaic modules and 20 photovoltaic modules 8 through a circuit breaker 4 and a plug 5 for fault troubleshooting, voltage at two ends of the ceramic resistor 3 of the load and current passing through the ceramic resistor are collected and compared with standard voltage and standard current under the same illumination condition, wherein the outlet voltage of the standard measuring module is 36-37V, and when the actual voltage is obviously abnormal and the actual current is smaller than the standard current value or has no current value, whether the photovoltaic module has a fault or not and the fault position can be judged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A photovoltaic electric field fault detection device, comprising: the detection circuit is connected with a ceramic resistor, two ends of the detection circuit are connected with circuit breakers, and the circuit breakers are connected with two ends of a single photovoltaic module or a plurality of photovoltaic modules connected in series through plugs.

2. The photovoltaic electric field fault detection device according to claim 1, wherein two ends of the ceramic resistor are connected in parallel with a voltmeter.

3. The photovoltaic electric field fault detection device according to claim 2, wherein an ammeter is connected in series to one side of the ceramic resistor.

4. The photovoltaic electric field fault detection device according to claim 3, wherein the number of said ceramic resistors is three, and said ceramic resistors are coupled to said detection circuit, and the resistance value of each of said ceramic resistors is different.

5. The photovoltaic electric field fault detection device according to claim 2, characterized in that said voltmeter is a multimeter.

6. The photovoltaic electric field fault detection device according to claim 3, wherein the ammeter is a clamp ammeter and the plug is an MC plug.

7. The photovoltaic electric field fault detection device according to claim 1, wherein a temperature sensor is disposed on a surface or one side of the ceramic resistor, and the temperature sensor is electrically connected to a temperature display.

8. The photovoltaic electric field fault detection device according to claim 7, wherein a cooling fan is further provided at one side of the ceramic resistor.

9. The photovoltaic electric field fault detection device according to claim 8, wherein a switch of the cooling fan is connected to the temperature sensor, and the cooling fan is turned on when the temperature detected by the temperature sensor is not lower than 45 ℃; when the detected temperature of the temperature sensor is not higher than 25 ℃, the cooling fan is turned off.

10. The photovoltaic electric field fault detection device according to claim 8, wherein the ceramic resistor, the temperature sensor, and the cooling fan are disposed within a device housing, and the circuit breaker and the temperature display are disposed outside the device housing.