Multi-detection-mode fault diagnosis instrument for connecting wind energy and light energy into micro-grid power equipment

Abstract

A multi-detection-mode fault diagnosis instrument for wind and light energy merged into micro-grid power equipment is composed of a PLC industrial personal computer, and a data acquisition device, a touch operation screen, a USB interface and a wireless communication module which are connected with the PLC industrial personal computer, and the data acquisition device comprises a photovoltaic side data acquisition module, a wind power side data acquisition module, an infrared temperature measurement head and an acoustic sensor. And the data output ends of the photovoltaic side data acquisition module and the wind power side data acquisition module are electrically connected to the PLC industrial personal computer. The operation data, the operation state and the fault information of the power electronic circuit power device are displayed in real time through the touch operation screen, and are sent to the background and the virtual remote background through the USB interface and the wireless communication module. Measurement of electrical parameters, thermal imaging images and acoustic characteristics of a power electronic circuit power device can be completed at a time, and improvement of measurement accuracy of a grid-connected system is facilitated. One machine has multiple purposes, and the operation efficiency of fault diagnosis is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy power, and particularly relates to a fault diagnosis device for wind and solar power generation integrated into a microgrid system. Background Art

[0002] With the development of distributed power sources and microgrids, the development and utilization of renewable energy sources such as solar energy and wind energy according to local conditions, and the configuration of microgrids with a certain amount of energy storage devices can become an important way to solve the impact of intermittent fluctuating power sources on the power grid and the power supply difficulties and energy shortages in remote areas. Modern power electronic circuits play an important role in the field of new energy power generation and grid connection. Especially in the main power circuit, the key power electronic power devices are the core components, and their stability and reliability are becoming more and more important to the operation of microgrids. In order to analyze the reliability of power electronic circuits, the key power devices in the circuit should be monitored, the fault characteristic parameters should be extracted, the fault conditions of each power device in the circuit should be diagnosed, and the reliability of the new energy grid connection system should be improved.

[0003] However, the detection modes of current power electronic circuit power device fault analysis equipment are often relatively single. The detection mode of a device is often limited to one of electrical characteristics detection, thermal imaging detection, and acoustic detection. If the electrical parameters, thermal imaging images, and acoustic characteristics of power electronic circuit power devices are to be measured simultaneously, multiple devices are often required to be used together. The detection work is time-consuming and labor-intensive, with low efficiency and extremely inconvenient operation. Utility Model Content

[0004] In view of the shortcomings of the existing wind and solar power generation integrated into the microgrid system fault detection technology, the utility model provides a portable multi-detection mode wind and solar power integrated into the microgrid power equipment fault diagnosis instrument, the fault diagnosis circuit of the fault diagnosis instrument is composed of a PLC industrial control computer and a data acquisition device connected thereto, a touch screen, a USB interface, and a wireless communication module, wherein: the data acquisition device includes a photovoltaic side data acquisition module, a wind power side data acquisition module, an infrared temperature measuring head and an acoustic sensor, and the operation data, operation status, and fault information of the power electronic circuit power device are displayed in real time through the touch screen, and at the same time, sent to the background and virtual remote background through the USB interface and the wireless communication module. Combining multiple detection methods, the electrical parameters, thermal imaging images, and acoustic characteristics of the power electronic circuit power device can be measured at one time, which is conducive to improving the measurement accuracy of the grid-connected system, providing more comprehensive equipment status information, and realizing the fault diagnosis of the new energy grid-connected system. One machine has multiple uses, which improves the operational efficiency of fault diagnosis.

[0005] The utility model discloses a multi-detection mode wind and solar energy integrated into a microgrid electric power equipment fault diagnosis instrument, which comprises a housing (1), a touch operation screen (4), a switch (5), a PLC industrial computer (9), a USB interface (10), a wireless communication module (11), a battery (12) and a data acquisition device.

[0006] The PLC industrial control computer (9), wireless communication module (11) and battery (12) are arranged in the housing (1).

[0007] The touch operation screen (4), switch (5) and USB interface (10) are all arranged on the housing (1).

[0008] The data acquisition device comprises an infrared temperature measuring head (2), an acoustic sensor (6), a photovoltaic side data acquisition module (7) and a wind power side data acquisition module (8); the infrared temperature measuring head (2) and the acoustic sensor (6) are fixed on the housing (1), and the photovoltaic side data acquisition module (7) and the wind power side data acquisition module (8) are arranged in the housing (1).

[0009] The data output terminals of the infrared temperature measuring head (2), the acoustic sensor (6), the photovoltaic side data acquisition module (7) and the wind power side data acquisition module (8) are electrically connected to the corresponding data acquisition input terminals of the PLC industrial control computer (9); the data input terminal of the photovoltaic side data acquisition module (7) is electrically connected to the measurement point of the photovoltaic side power equipment; the data input terminal of the wind power side data acquisition module (8) is electrically connected to the measurement point of the wind power side power equipment; the data input terminal of the touch operation screen (4) is electrically connected to the display data output terminal of the PLC industrial control computer (9); the operation data output terminal of the touch operation screen (4) is electrically connected to the operation data input terminal of the PLC industrial control computer (9); and the wireless communication module (11) and the USB interface (10) are electrically connected to the detection data output terminal of the PLC industrial control computer (9).

[0010] The battery (12) is electrically connected to the components in the detection circuit via a switch (5).

[0011] The data input ends of the photovoltaic side data acquisition module (7) and the wind power side data acquisition module (8) are connected to the measuring points of the measured power equipment via wires using a clamping mechanism.

[0012] A handle (3) is provided on the top of the shell (1).

[0013] Compared with the existing wind and solar power generation integrated into microgrid system fault detection technology, the beneficial effects of the multi-detection mode wind and solar power integrated into microgrid power equipment fault diagnosis instrument of the utility model are as follows:

[0014] 1. The equipment can complete the measurement of electrical parameters, thermal imaging images, and acoustic characteristics of power electronic circuit power devices at one time without the need for additional external instruments, thus reducing the impact of external factors and improving the measurement accuracy of the grid-connected system.

[0015] 2. The equipment simplifies the operation difficulty and is easy to use through the reasonable layout of the detector body and supporting mechanism.

[0016] 3. One machine can be used for multiple purposes, improving the operational efficiency of fault diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the appearance structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure layout of the utility model;

[0020] Figure 3 It is a schematic diagram of the rear view appearance structure of the utility model;

[0021] Figure 4 It is a signal flow schematic diagram of the utility model;

[0022] Figure 5 It is a module signal flow chart of the utility model.

[0023] Legend: 1. Shell, 2. Infrared temperature measuring head, 3. Handle, 4. Touch screen, 5. Switch, 6. Acoustic sensor, 7. Photovoltaic side data acquisition module, 8. Wind power side data acquisition module, 9. PLC industrial computer, 10. USB interface, 11. Wireless communication module, 12. Battery. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is described in detail in combination with the following embodiments. The embodiments given in the utility model are for better understanding, but do not limit the utility model. The components and materials used in the embodiments are commercially available unless otherwise specified. The utility model is not limited by the following embodiments, and the specific implementation method can be determined according to the technical solution of the utility model and the actual situation.

[0025] like Figure 1As shown in Figures 2, 3, 4, and 5, a multi-detection mode wind and solar energy integrated into a microgrid power equipment fault diagnosis instrument of the utility model is composed of a housing 1, a touch screen 4, a switch 5, a PLC industrial computer 9, a USB interface 10, a wireless communication module 11, a battery 12, and a data acquisition device. The PLC industrial computer 9, the wireless communication module 11, and the battery 12 are arranged on a circuit board in the housing 1, and the circuit board is fixed to the housing 1 by means of pile feet. The touch screen 4, the switch 5, and the USB interface 10 are all fixed to the housing 1. The data acquisition device includes an infrared temperature measuring head 2, an acoustic sensor 6, a photovoltaic side data acquisition module 7, and a wind power side data acquisition module 8. The infrared temperature measuring head 2 and the acoustic sensor 6 are fixed to the housing 1, wherein: the infrared temperature measuring head 2 is fixed to the top of the housing 1, and the acoustic sensor 6 is fixed to the housing at the middle position of the back of the housing 1. The photovoltaic side data acquisition module 7 and the wind power side data acquisition module 8 are arranged on the circuit board in the housing 1.

[0026] The data output terminals of the infrared temperature measuring head 2, the acoustic sensor 6, the photovoltaic side data acquisition module 7 and the wind power side data acquisition module 8 are electrically connected to the corresponding data acquisition input terminals of the PLC industrial control computer 9, the data input terminal of the photovoltaic side data acquisition module 7 is electrically connected to the measurement point of the photovoltaic side power equipment, and the data input terminal of the wind power side data acquisition module 8 is electrically connected to the measurement point of the wind power side power equipment. Among them: the infrared temperature measuring head 2 is used to collect infrared signals of power devices of power electronic circuits on the photovoltaic side and wind power side, and the Melexin MLX90640-A infrared array high-precision temperature sensor can be preferably used; the acoustic sensor 6 is used to collect acoustic signals of power devices of power electronic circuits on the photovoltaic side and wind power side, and the Infineon XENSIV™ MEMS microphone can be preferably used; the photovoltaic side data acquisition module 7 and the wind power side data acquisition module 8 are used to respectively collect voltage and current data of power devices of power electronic circuits on the photovoltaic side and wind power side in real time, and the photovoltaic side data acquisition module 7 and the wind power side data acquisition module 8 can both preferably use the Taihean Technology TP3121 / TI2 voltage / current signal sensor.

[0027] The data input terminal of the touch operation screen 4 is electrically connected to the display data output terminal of the PLC industrial computer 9, and the operation data output terminal of the touch operation screen 4 is electrically connected to the operation data input terminal of the PLC industrial computer 9. A 6.0-inch HF-66051-3539-A0 touch screen can be preferably used for displaying collected data, operating status and fault alarms, and parameter setting, modification and control operations can be performed at the same time.

[0028] The wireless communication module 11 and the USB interface 10 are electrically connected to the detection data output terminal of the PLC industrial computer 9. Among them: the wireless communication module 11 wireless communication can include any one or more of 3G communication, 4G communication, 5G communication and WIFI communication, which is used to transmit the detection data, operation status information and fault alarm to the remote virtual background in real time. The USB interface 10 can be connected to the background via a data cable, transmit the detection data, operation status information in real time, and perform fault alarm. The USB interface 10 can use USB2.0 or USB3.0.

[0029] The battery 12 for providing power to the detection circuit is arranged on a circuit board in the housing 1 and is electrically connected to the components in the detection circuit through the switch 5 .

[0030] The data input terminals of the photovoltaic side data acquisition module 7 and the wind power side data acquisition module 8 are connected to the measuring points of the measured power equipment through wires using a clamping mechanism.

[0031] A handle 3 is fixed to the top of the housing 1 .

[0032] In this embodiment, the infrared temperature measuring head 2 can collect infrared signal characteristics of photovoltaic side power electronic circuit power devices and wind power side power electronic circuit power devices within a specific distance, and send the collected data to the PLC industrial computer 9 for analysis. The PLC industrial computer 9 compares the original preset parameters to analyze the operating status of the power electronic circuit power devices, and transmits it to the touch operation screen 4 for real-time display. According to the parameters of the infrared image of the equipment, the fault location of the equipment is clearly identified. By analyzing the thermal imaging data, it can be found whether the measured equipment has a local overheating problem. If the equipment detects local overheating, the words "local overheating" will be displayed on the touch operation screen 4 as an alarm reminder.

[0033] The acoustic sensor 6 is fixed on the shell at the middle position of the back of the shell 1. The acoustic sensor 6 can collect the acoustic signal characteristics of the photovoltaic side power electronic circuit power devices and the wind power side power electronic circuit power devices within a specific distance, and send the collected data to the PLC industrial control computer 9 for analysis. The industrial control computer compares the original preset parameters to analyze the operating status of the power electronic circuit power devices, and transmits it to the touch operation screen 4 for real-time display. According to the equipment acoustic parameters, the equipment fault type is clarified. The ultrasonic signal generated by partial discharge is detected by the acoustic sensor 6 to determine whether there is a partial discharge phenomenon. If the equipment detects a partial discharge phenomenon, the word "partial discharge" will be displayed on the touch operation screen 4 as an alarm reminder.

[0034] The photovoltaic side data acquisition module 7 collects the voltage and current parameters of the power devices of the photovoltaic side power electronic circuit, and sends the collected data to the PLC industrial computer 9 for analysis. The PLC industrial computer 9 compares the original preset parameters to analyze the operating status of the power devices of the power electronic circuit, and transmits it to the touch operation screen 4 for real-time display to judge the operation status of the equipment or the degree of failure. If the voltage of the power devices of the photovoltaic side power electronic circuit exceeds the range of (220V±5%), the touch operation screen 4 will display the words "voltage overload" for alarm reminder; or if the current of the power devices of the photovoltaic side power electronic circuit exceeds the range of 63A, the touch operation screen 4 will display the words "current overload" for alarm reminder.

[0035] The data acquisition module 8 on the wind power side collects the voltage and current parameters of the power devices of the power electronic circuit on the wind power side, and sends the collected data to the PLC industrial computer 9 for analysis. The PLC industrial computer 9 compares the original preset parameters to analyze the operating status of the power devices of the power electronic circuit, and transmits it to the touch operation screen 4 for real-time display to judge the operating status of the equipment or the degree of failure. If the voltage of the power devices of the power electronic circuit on the wind power side exceeds the range of (220V±5%), the touch operation screen 4 will display the words "voltage overload" for alarm reminder; or if the current of the power devices of the power electronic circuit on the wind power side exceeds the range of 63A, the touch operation screen 4 will display the words "current overload" for alarm reminder.

[0036] The comparison parameters preset in the PLC industrial computer 9 are: the preset standard value of the normal fluctuation range of the photovoltaic side voltage and current data as the judgment threshold; the preset standard value of the normal fluctuation range of the wind power side voltage and current data as the judgment threshold; the preset standard infrared image as the infrared image comparison benchmark; the preset standard acoustic parameter as the acoustic data comparison benchmark.

[0037] While receiving the real-time collected photovoltaic side voltage and current data, wind power side voltage and current data, infrared image data, and acoustic data, the PLC industrial computer 9 calls the preset judgment threshold, infrared image comparison benchmark, and acoustic data comparison benchmark to match and compare with the real-time collected photovoltaic side voltage and current data, wind power side voltage and current data, infrared image data, and acoustic data. The matching and comparison results are converted by the PLC industrial computer 9 into electrical signal data and sent to the touch operation screen 4 for display, and at the same time sent to the background connected to it through the USB interface 10, and sent to the virtual remote background through the wireless communication module 11.

[0038] The touch operation screen 4 can be operated by touch, and the display mode and display content can be selected, for example, the voltage and current parameters, infrared signal characteristics, and acoustic signal characteristics of the power device of the power electronic circuit under test can be displayed on the same screen, or one of the above can be displayed separately; at the same time, the parameters can be preset and modified by touch operation. A main menu is set on the touch operation screen 4, and the main menu content includes "voltage and current parameter monitoring", "infrared signal characteristic monitoring", and "acoustic signal characteristic monitoring". You can enter the secondary menu by clicking "voltage and current parameter monitoring" to view the voltage and current data of the power device of the power electronic circuit under test; you can enter the secondary menu by clicking the "infrared signal characteristic monitoring" icon to view the infrared signal characteristics of the power device of the power electronic circuit under test; you can enter the secondary menu by clicking the "acoustic signal characteristic monitoring" icon to view the acoustic signal characteristics of the power device of the power electronic circuit under test. You can return to the "main menu" by clicking the "back" button. In the secondary menu of "Voltage and Current Parameter Monitoring", the displayed parameter items are: the current amplitude and phase angle data, voltage amplitude and phase angle data of the power electronic circuit power devices on the wind power side collected by the data acquisition module 8 on the wind power side; the current amplitude and phase angle data, voltage amplitude and phase angle data of the power electronic circuit power devices on the photovoltaic side collected by the data acquisition module 7 on the photovoltaic side. In the secondary menu of "Infrared Signal Feature Monitoring", the displayed parameter items are: the temperature distribution of the power electronic circuit power devices on the wind power side and the temperature distribution of the power electronic circuit power devices on the photovoltaic side. In the secondary menu of "Acoustic Signal Feature Monitoring", the displayed parameter items are: the sound waves generated when the power electronic circuit power devices on the wind power side are in operation, and the sound waves generated when the power electronic circuit power devices on the photovoltaic side are in operation.

[0039] The USB interface 10 sends the voltage and current parameters, infrared signal characteristics, and acoustic signal characteristics of the power device of the power electronic circuit under test to the background connected to it in real time, and synchronously sends the alarm signal and alarm time to the background when the alarm condition is met to generate a background log.

[0040] The wireless communication module 11 will select and display the voltage and current parameters, infrared signal characteristics, and acoustic signal characteristics of the power device of the tested power electronic circuit and send them to the remote virtual background in real time, and will synchronously send the alarm signal and alarm time to the remote virtual background when the alarm conditions are met to generate a background log.

[0041] By collecting the photovoltaic side current and voltage parameters, wind power side current and voltage parameters, infrared signal characteristics, and acoustic signal characteristics of the power electronic circuit power devices and comparing them with the existing fault database in the industrial computer, it is possible to implement fault classification diagnosis of power equipment and automatically generate inspection reports, effectively solving the problem of the single detection mode of existing fault detectors.

[0042] Although the embodiments of the present disclosure are described above in conjunction with the accompanying drawings, the present disclosure is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are merely illustrative and instructive, rather than restrictive. A person of ordinary skill in the art can also make many forms under the guidance of this specification and without departing from the scope of protection of the claims of the present disclosure, all of which belong to the scope of protection of the present disclosure.

Claims

1. A multi-detection mode wind and solar energy integrated into microgrid power equipment fault diagnosis instrument, characterized by: The fault diagnosis instrument comprises a housing (1), a touch operation screen (4), a switch (5), a PLC industrial computer (9), a USB interface (10), a wireless communication module (11), a battery (12) and a data acquisition device; the PLC industrial computer (9), the wireless communication module (11) and the battery (12) are arranged in the housing (1); the touch operation screen (4), the switch (5) and the USB interface (10) are all arranged on the housing (1); the data acquisition device comprises an infrared temperature measuring head (2), an acoustic sensor (6), a photovoltaic side data acquisition module (7) and a wind power side data acquisition module (8); the infrared temperature measuring head (2) and the acoustic sensor (6) are fixed on the housing (1); the photovoltaic side data acquisition module (7) and the wind power side data acquisition module (8) are arranged The device is placed in a housing (1); wherein: the data output ends of the infrared temperature measuring head (2), the acoustic sensor (6), the photovoltaic side data acquisition module (7) and the wind power side data acquisition module (8) are electrically connected to the corresponding data acquisition input ends of the PLC industrial control computer (9); the data input end of the photovoltaic side data acquisition module (7) is electrically connected to the measurement point of the photovoltaic side power equipment; the data input end of the wind power side data acquisition module (8) is electrically connected to the measurement point of the wind power side power equipment; the data input end of the touch operation screen (4) is electrically connected to the display data output end of the PLC industrial control computer (9); the operation data output end of the touch operation screen (4) is electrically connected to the operation data input end of the PLC industrial control computer (9); and the wireless communication module (11) and the USB interface (10) are electrically connected to the detection data output end of the PLC industrial control computer (9).

2. A multi-detection mode wind and solar energy integrated into microgrid power equipment fault diagnosis instrument as claimed in claim 1, characterized in that: The battery (12) is electrically connected to the electrical components in the detection circuit via a switch (5).

3. A multi-detection mode wind and solar energy integrated into microgrid power equipment fault diagnosis instrument as claimed in claim 1, characterized in that: The data input ends of the photovoltaic side data acquisition module (7) and the wind power side data acquisition module (8) are connected to the measuring points of the measured power equipment via wires using a clamping mechanism.

4. A multi-detection mode wind and solar energy integrated into microgrid power equipment fault diagnosis instrument as claimed in claim 1, characterized in that: A handle (3) is provided on the top of the shell (1).

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