CN210693862U

CN210693862U - Photovoltaic power plant subassembly hot spot fault automatic checkout device

Info

Publication number: CN210693862U
Application number: CN201921476365.6U
Authority: CN
Inventors: 张士龙; 张宁宁
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-06-05
Anticipated expiration: 2029-09-06

Abstract

The utility model discloses an automatic hot spot fault detection device for a photovoltaic power station assembly, which belongs to the field of photovoltaic power station fault detection and comprises a walking part, an infrared imaging part, a wireless transmission part, a chart conversion part, a hot spot fault judgment part and an alternating current power supply, wherein the walking part is used for detecting hot spot faults of the photovoltaic power station assembly; the infrared imaging component is mounted on the walking component, the wireless transmission component is arranged on the infrared imaging component, the wireless transmission component is in wireless connection with the chart conversion component, the chart conversion component is connected with the hot spot fault determination component, and the alternating current power supply is respectively connected with the walking component, the infrared imaging component, the chart conversion component and the hot spot fault determination component. The utility model has perfect structure, compact system and strong practicability, and is suitable for the photovoltaic power generation industry; the method has operability, and is a good method proved by practice; the method has scientificity and can meet the requirements of the photovoltaic power station; the comparability is strong. Has wide applicability.

Description

Photovoltaic power plant subassembly hot spot fault automatic checkout device

Technical Field

The utility model relates to a photovoltaic power plant subassembly hot spot trouble automatic checkout device and method belongs to photovoltaic power plant fault detection area.

Background

The single solar cell cannot be directly used as a power supply. The power supply must be composed of several single batteries connected in series, parallel and tightly packed. The photovoltaic module is a core part in a solar power generation system and is also the most important part in the solar power generation system. The solar energy is converted into electric energy and then is transmitted to a storage battery for storage or the load is pushed to work. However, with the use of the micro inverter, the current source of the photovoltaic module can be directly converted into the voltage source, and the electric appliance can be driven to be applied to our lives.

Meanwhile, the photovoltaic module is continuously innovated, because the photovoltaic module is called as Chinese manufacturing in the industry, China should be created, and further, an upgraded and innovated product of the photovoltaic module appears, once the photovoltaic module is put into a general market, certain impact is caused on the photovoltaic module and the traditional building materials.

One solar cell can only produce about 0.5 volt, which is much lower than the voltage required for practical use. In order to meet the requirements of practical application, solar cells need to be connected into modules. The solar cell module comprises a number of solar cells, which are connected by means of wires. For example, a solar module has 36 solar cells, which means that a solar module can generate about 17 volts.

The physical unit formed by sealing the solar cells connected by the wires is called a solar cell module, has certain capacities of corrosion resistance, wind resistance, hail prevention and rain resistance, and is widely applied to various fields and systems. When the application field needs higher voltage and current and a single component can not meet the requirement, a plurality of components can be combined into a solar cell matrix to obtain the required voltage and current.

Under certain conditions, the shaded solar cell modules in the serial branch are used as loads to consume energy generated by other illuminated solar cell modules. The shaded solar cell module generates heat at this time, which is a hot spot effect. This effect can severely damage the solar cell. Some of the energy generated by the illuminated solar cell may be consumed by the shaded cells. In order to prevent the solar cell from being damaged due to the hot spot effect, a bypass diode is preferably connected in parallel between the positive and negative electrodes of the solar cell module to prevent the energy generated by the illuminating module from being consumed by the shielded module.

Solar modules are typically installed in wide, sunny areas. The shielding objects such as flying birds, dust, fallen leaves and the like are difficult to fall on for a long time in use, the shielding objects form shadows on the solar cell module, and the shadows can be formed when the row spacing is not suitable in a large-scale solar cell module matrix. Due to the existence of the local shadow, the current and the voltage of certain single cells in the solar cell module are changed. As a result, the product of the local current and voltage of the solar cell module increases, and a local temperature rise occurs in the solar cell module. Therefore, hot spots of photovoltaic power plant components cannot be avoided.

In the practical use of the solar cell, if the temperature generated by the hot spot effect exceeds a certain limit, the welding spots on the cell module can be melted and the grid lines can be damaged, so that the whole solar cell module is scrapped. The hot spots also consume a large amount of electric energy, reduce the energy utilization rate and cause economic loss.

The photovoltaic power station is provided with tens of thousands or hundreds of thousands of components, so that the device is huge, the structure is complex, the hot spot hidden danger is various, the reasons are various, and the accurate detection difficulty is high, so that the automatic hot spot fault detection device and method for the photovoltaic power station components are urgently needed.

At present, no automatic detection device and method for hot spot faults of photovoltaic power station components are developed for relevant research.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a photovoltaic power plant subassembly hotspot trouble automatic checkout device that structural design is reasonable.

The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a photovoltaic power plant subassembly hotspot fault automatic checkout device, is including the running gear who is used for detecting photovoltaic power plant subassembly hotspot fault, its characterized in that: the infrared imaging device also comprises an infrared imaging component, a wireless transmission component, a chart conversion component, a hot spot fault determination component and an alternating current power supply; the infrared imaging component is mounted on the walking component, the wireless transmission component is arranged on the infrared imaging component, the wireless transmission component is in wireless connection with the chart conversion component, the chart conversion component is connected with the hot spot fault determination component, and the alternating current power supply is respectively connected with the walking component, the infrared imaging component, the chart conversion component and the hot spot fault determination component.

Furthermore, the walking part provides a function of walking along the string for the photovoltaic power station assembly hot spot fault automatic detection device, the wireless transmission part transmits the shot infrared image to the chart conversion part through a wireless network in real time, the chart conversion part converts the infrared image into chart data, the hot spot fault judgment part compares the chart data of the chart conversion part with a set threshold value for judgment, a picture with the threshold value data is judged to be a hot spot, the hot spot fault judgment part marks the picture and automatically gives an alarm, the chart conversion part and the hot spot fault judgment part belong to the existing mature technology, and the alternating current power supply provides electric energy for the parts.

Compared with the prior art, the utility model, have following advantage and effect:

1. the photovoltaic power generation system is complete in structure, compact in system, high in practicability, suitable for being used in the photovoltaic power generation industry, and has operability, and practice proves that the photovoltaic power generation system is a good method.

2. Possess the scientificity, can satisfy photovoltaic power plant's requirement.

3. The comparability is strong.

4. Has wide applicability.

Drawings

Fig. 1 is the embodiment of the utility model provides an embodiment photovoltaic power plant subassembly hotspot fault automatic checkout device's structural schematic diagram.

In the figure: the device comprises a walking part 1, an infrared imaging part 2, a wireless transmission part 3, a chart conversion part 4, a hot spot fault determination part 5 and an alternating current power supply 6.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples are given.

Referring to fig. 1, the automatic detection device for hot spot failure of a photovoltaic power station assembly in the present embodiment includes a walking component 1 for detecting hot spot failure of the photovoltaic power station assembly, an infrared imaging component 2, a wireless transmission component 3, a chart conversion component 4, a hot spot failure determination component 5, and an ac power supply 6.

The infrared imaging part 2 is installed on the walking part 1, the wireless transmission part 3 is arranged on the infrared imaging part 2, the wireless transmission part 3 is in wireless connection with the chart conversion part 4, the chart conversion part 4 is connected with the hot spot fault determination part 5, the alternating current power supply 6 is respectively connected with the walking part 1, the infrared imaging part 2, the chart conversion part 4 and the hot spot fault determination part 5, and the alternating current power supply 6 provides electric energy for the parts.

The working method of the automatic hot spot fault detection device for the photovoltaic power station assembly comprises the following steps:

step one, a walking part 1 enables an automatic hot spot fault detection device of a photovoltaic power station assembly to walk along a route fixed by a group string;

step two, when the walking part 1 with hot spot faults of the photovoltaic power station assembly walks along the group string, the infrared imaging part 2 also walks along the group string, and simultaneously performs infrared imaging shooting, wherein the set shooting time interval is the time when the walking part 1 walks through one assembly;

step three, the wireless transmission component 3 transmits the infrared image automatically shot by the infrared imaging component 2 to the chart conversion component 4 in real time, and the transmission process is automatic transmission;

step four, the chart conversion part 4 converts the infrared image into chart data, the hot spot fault judgment part 5 compares the chart data of the chart conversion part 4 with a set threshold value for judgment, and the image with data larger than the threshold value is judged to be the hot spot;

step five, the hot spot fault judging component 5 marks the picture judged as the hot spot and automatically gives an alarm;

step six, the detection personnel compares the alarm picture numbers with the numbers of all the components of the photovoltaic power station which are arranged in advance (the walking part 1 walks according to the serial number sequence of all the components of the photovoltaic power station which are arranged);

seventhly, obtaining a result of hot spot faults of the components at which positions in tens of thousands of components of the photovoltaic power station by a detector;

and step eight, finishing the detection.

In the second step: the infrared imaging component 2 can shoot infrared images, visible light images and camera, and automatic inspection is achieved.

The photovoltaic power plant can freely arrange the frequency of detection.

In this embodiment, the traveling unit 1 travels by four rollers at the upper and lower ends driven by a motor.

In this embodiment, the walking unit 1 is connected to the infrared imaging unit 2 via a tripod.

In this embodiment, the automatic photographing time interval set by the infrared imaging section 2 is 14 seconds.

In this embodiment, the wireless transmission section 3 is implemented by a wireless data card.

In this embodiment, the automatic alarm of the hot spot failure determination section 5 is an audible and visual alarm.

Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications made by those skilled in the art without departing from the spirit and scope of the present invention should be construed as being included in the following claims.

Claims

1. The utility model provides a photovoltaic power plant subassembly hotspot fault automatic checkout device, includes walking part (1) that is used for detecting photovoltaic power plant subassembly hotspot fault, its characterized in that: the hot spot fault diagnosis device further comprises an infrared imaging part (2), a wireless transmission part (3), a chart conversion part (4), a hot spot fault determination part (5) and an alternating current power supply (6); the infrared imaging part (2) is installed on the walking part (1), the wireless transmission part (3) is arranged on the infrared imaging part (2), the wireless transmission part (3) is in wireless connection with the chart conversion part (4), the chart conversion part (4) is connected with the hot spot fault determination part (5), and the alternating current power supply (6) is respectively connected with the walking part (1), the infrared imaging part (2), the chart conversion part (4) and the hot spot fault determination part (5).

2. The photovoltaic power plant component hot spot fault automatic detection device of claim 1, characterized in that: the walking part (1) is connected with the infrared imaging part (2) through a tripod.