Power electronic device driving module detection device and method

Abstract

The invention discloses a power electronic device driving module detection device and method, which are applied to the electronic circuit detection technology, and comprise a detection unit, an onboard unit and a valve structure assembly, the detection unit is arranged on the other side of a radiator, the onboard unit is arranged on a driving board of a power electronic device, and the detection unit and the onboard unit are in communication interaction. According to the device, the overall performance and the fault condition of operation of the power electronic device are detected, extra hardware and complex wiring are avoided through onboard integration and wireless communication, and therefore the system structure is simplified, interference to a valve structure is reduced, and detection of the power electronic device is achieved under the condition that a valve structure assembly is not damaged or interfered.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic circuit detection, and particularly to a detection device and method for a power electronic device drive module. Background Art

[0002] In the power transmission system of a new type of power transmission and transformation project, power electronic devices are widely used due to their large capacity, low loss, and high reliability. During the operation of the valve structure components of power electronic devices, how to online monitor the reliability parameters and operating status of power electronic devices has become a difficult point in the reliability and life prediction of system operation. However, in the existing detection methods, it is easy to occur that during the actual operation of the valve structure components, the reliability parameters of power electronic devices cannot be measured, and the normal operation of the valve structure components will be affected during the testing process. Summary of the Invention

[0003] To solve the above technical problems, embodiments of the present invention provide a detection device and method for a power electronic device drive module to solve the problem that the power electronic devices in the working valve structure components cannot be online detected in the existing detection devices.

[0004] In a first aspect of embodiments of the present invention, a detection device for a power electronic device drive module is provided. The device includes a detection unit, an on-board unit, and a valve structure component. The valve structure component includes a power electronic device and a radiator, and one side of the power electronic device is connected to one side of the radiator. The detection unit at least includes a detection coil, a first signal processing module, a signal transmitting coil, a wireless signal transmitting module, and a plurality of sensors. The detection coil forms a closed-loop structure around the surface of the power electronic device for one week. Each sensor is respectively fixed under a plurality of sampling points of the detection coil. One end of the detection coil is connected to the first end of the first signal processing module. The second end of the first signal processing module is connected to the first end of the signal transmitting coil. The second end of the signal transmitting coil is connected to the first end of the wireless signal transmitting module. The second end of the wireless signal transmitting module is connected to the on-board unit. The on-board unit at least includes a signal receiving coil and a second signal processing module. The first end of the signal receiving coil is connected to the detection unit, and the second end of the signal receiving coil is connected to the first end of the second signal processing module. The detection unit is arranged on the other side of the radiator, and the on-board unit is arranged on the drive board of the power electronic device. The detection unit and the on-board unit communicate with each other.

[0005] In a possible implementation manner of the first aspect, the detection unit further includes a first energy storage module, wherein One end of the detection coil is connected to the first end of the first energy storage module, and the first end of the first signal processing module and the first end of the wireless signal transmitting module are respectively connected to the second end of the first energy storage module.

[0006] In a possible implementation manner of the first aspect, the on-board unit further includes a second energy storage module, an optical fiber communication interface, a microprocessor, and a power supply interface, where The first end of the second energy storage module is connected to the signal receiving coil, the second end of the second energy storage module is connected to the first end of the power supply interface, the second end of the power supply interface is connected to the first end of the microprocessor, and the second end of the microprocessor is connected to the first end of the optical fiber communication interface.

[0007] In a possible implementation manner of the first aspect, the on-board unit further includes a modulator, where The modulator is connected to the second end of the second signal processing module.

[0008] In a possible implementation manner of the first aspect, the number of sampling points is 4.

[0009] To solve the same technical problem, a second aspect of the embodiments of the present invention provides a method for detecting a power electronic device driving module, which is implemented by the power electronic device driving module detection device as in the first aspect, and includes: Collect the current signal in the blocking state of the power electronic device; Control the detection unit to convert the current signal into an electromagnetic detection signal and send the electromagnetic detection signal to the on-board unit; Control the on-board unit to analyze and process the electromagnetic detection signal to obtain the working state of the power electronic device.

[0010] In a possible implementation manner of the second aspect, controlling the on-board unit to analyze and process the electromagnetic detection signal to obtain the working state of the power electronic device includes: Control the on-board unit to perform modulation processing on the electromagnetic detection signal to obtain a modulation processing result; Judge whether the electromagnetic detection signal meets the control conditions according to the modulation processing result. If it meets, analyze and process the modulation processing result to obtain the working state of the power electronic device.

[0011] In a possible implementation manner of the second aspect, it further includes: Collect the electromagnetic signal, convert the electromagnetic signal into direct current electrical energy, and send it to the first energy storage module and the second energy storage module for storage.

[0012] In a possible implementation manner of the second aspect, after obtaining the working state of the power electronic device, it further includes: The control board-mounted unit sends the operating status of the power electronic device to the host computer through the drive module.

[0013] The technical solution of the present invention has the following advantages: The power electronic device drive module detection device provided by the embodiment of the present invention includes a detection unit, a board-mounted unit, and a valve structure assembly. The detection unit is arranged on the other side of the radiator, the board-mounted unit is arranged on the drive board of the power electronic device, and the detection unit communicates with the board-mounted unit to detect the overall performance and fault conditions of the operation of the power electronic device. This device simplifies the system structure and reduces the interference to the valve structure through board-mounted integration and wireless communication, avoiding additional hardware and complex wiring, and realizes the detection of power electronic devices without damaging or interfering with the valve structure assembly.

[0014] The power electronic device drive module detection method provided by the embodiment of the present invention collects the current signal in the blocking state of the power electronic device, then converts the current signal into an electromagnetic detection signal and sends it to the board-mounted unit, so that the board-mounted unit judges the electromagnetic detection signal to obtain the operating status of the power electronic device. Through the above method, when the leakage current changes, the actually measured detection voltage also changes accordingly. According to the change of the detection voltage, it is analyzed and judged whether the reliability parameters of the power electronic device of the valve structure are normal, realizing the on-line detection of the power electronic device in the working valve structure assembly. Description of the Drawings

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is the structure diagram of the power electronic device drive module detection device of the power electronic device drive module detection device in the embodiment of the present invention; Figure 2 It is the power electronic device structure diagram of the circuit of the power electronic device drive module detection device in the embodiment of the present invention; Figure 3 It is the partial structure diagram of the power electronic device drive module detection device of the power electronic device drive module detection device in the embodiment of the present invention; Figure 4 It is the detection unit structure diagram of the power electronic device drive module detection method in the embodiment of the present invention; Figure 5It is the structure diagram of the on-board unit of the detection method for the power electronic device drive module in the embodiment of the present invention; Figure 6 It is the flowchart of the detection method for the power electronic device drive module in the embodiment of the present invention; Reference numerals: 1, power electronic device; 2, radiator; 3, detection unit; 4, on-board unit; 5, drive board; 6, sensor; 100, valve structure assembly; 301, detection coil; 302, first signal processing module; 303, first energy storage module; 304, wireless signal transmission module; 401, signal receiving coil; 402, second signal processing module; 403, optical fiber communication interface; 404, power supply interface. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] The power electronic device drive module detection device provided by the embodiment of the present invention is as Figure 1 shown, Figure 1 It is the structure diagram of the power electronic device drive module detection device, including a detection unit 3, an on-board unit 4, and a valve structure assembly 100. The valve structure assembly 100 includes a power electronic device 1 and a radiator 2, and one side of the power electronic device 1 is connected to one side of the radiator 2; The detection unit 3 at least includes a detection coil 301, a first signal processing module 302, a signal transmitting coil, a wireless signal transmitting module 304, and several sensors 6. The detection coil surrounds the surface of the power electronic device 1 for one week to form a closed-loop structure. Each sensor 6 is respectively fixed under several sampling points of the detection coil. One end of the detection coil is connected to the first end of the first signal processing module 302, the second end of the first signal processing module 302 is connected to the first end of the signal transmitting coil, and the second end of the signal transmitting coil is connected to the on-board unit 4; The on-board unit 4 at least includes a signal receiving coil 401 and a second signal processing module 402. The first end of the signal receiving coil 401 is connected to the detection unit 3, and the second end of the signal receiving coil 401 is connected to the first end of the second signal processing module 402; The detection unit 3 is arranged on the other side of the radiator 2, and the on-board unit 4 is arranged on the drive board 5 of the power electronic device 1. The detection unit 3 communicates with the on-board unit 4.

[0020] In this embodiment, as Figure 1 shown, the power electronic device drive module detection device includes a valve structure assembly 100, a detection unit 3, and an on-board unit 4. Among them, the valve structure assembly 100 includes a power electronic device 1 and a radiator 2. Specifically, the valve structure assembly 100 is composed of the power electronic device 1 and the radiator 2 pressed together with each other, as Figure 2 shown. Figure 2 is a circuit power electronic device structure diagram. The power electronic device 1 is pressed between flat radiators 2. Its main function is to perform turn-on and turn-off operations, enable a large current frequency to pass through the valve structure, and control and convert the passing current.

[0021] The detection unit 3 is fixed on the side surface of the radiator 2. The detection unit 3 at least includes a detection coil, a first signal processing module 302, a signal transmitting coil, and several sensors 6. As Figure 3 can be seen, Figure 3 is a partial structure diagram of the power electronic device drive module detection device. The detection coil is fixed on the surface of the power electronic device 1. Specifically, the detection coil surrounds the surface of the power electronic device 1 for one week to form a closed-loop structure, and each sensor 6 is respectively fixed under several sampling points of the detection coil.

[0022] It should be noted that the sensor 6 is a magnetoelectric sensor 6 made of a high-permeability magnetic path material, which can detect the change of the surrounding magnetic field and correspond the magnetic field change to the detection of the current in the device blocking state. The high-permeability magnetic path material includes but is not limited to soft magnetic alloys, ferrite materials, etc. The power electronic device is preferably an Integrated Gate-Commutated Thyristor (IGCT). The functions, performance, and reliability of the drive module of the IGCT are tested and verified to ensure that it can safely and accurately control the switching behavior of the main power device.

[0023] Figure 4 is a detection unit structure diagram, as Figure 4As shown in the figure, the detection coil is connected to the first signal processing module 302. The first signal processing module 302 is connected to the signal transmitting coil. The signal transmitting coil is connected after the first signal processing circuit, and sends the processed current signal and feedback information to the on-board unit 4. Specifically, one end of the detection coil is connected to the first end of the first signal processing module 302, the second end of the first signal processing module 302 is connected to the first end of the signal transmitting coil, the second end of the signal transmitting coil is connected to the first end of the wireless signal transmitting module 304, and the second end of the wireless signal transmitting module 304 is connected to the on-board unit 4.

[0024] It should be noted that the first signal processing module 302 refers to the signal processing circuit in the detection unit 3. The connection of the second end of the signal transmitting coil to the on-board unit 4 can be understood as: the second end of the wireless signal transmitting module 304 is connected to the first end of the signal receiving coil 401 in the on-board unit 4. The first end generally refers to the input / starting connection point of a component or module, which may be a signal input terminal, a positive power supply terminal, the starting pin of a coil, etc. The second end usually refers to the output / terminating connection point of a component or module, such as a signal output terminal, a grounding terminal, the end pin of a coil.

[0025] Figure 5 For the structure diagram of the on-board unit, as Figure 5 shown, the on-board unit 4 is located on the drive board 5 of the power electronic device 1. The on-board unit 4 at least includes a signal receiving coil 401 and a second signal processing module 402. Specifically, the first end of the signal receiving coil 401 is connected to the detection unit 3, and the second end of the signal receiving coil 401 is connected to the first end of the second signal processing module 402. The signal receiving coil 401 is made of a new material electromagnetic coil, which is used to receive electromagnetic detection signals and modulate the electromagnetic detection signals to determine whether the electromagnetic detection signals meet the control conditions.

[0026] In one embodiment, the detection unit 3 further includes a first energy storage module 303, where one end of the detection coil is connected to the first end of the first energy storage module 303, and the first ends of the first signal processing module 302 and the wireless signal transmitting module 304 are respectively connected to the second end of the first energy storage module 303.

[0027] In this embodiment, the first energy storage module 303 is arranged between the detection coil, the first signal processing module 302 and the wireless signal transmitting module 304. Specifically, one end of the detection coil is connected to the first end of the first energy storage module 303, and the first ends of the first signal processing module 302 and the wireless signal transmitting module 304 are respectively connected to the second end of the first energy storage module 303. During the operation of the valve structure assembly 100, the first energy storage module 303 absorbs the electromagnetic signal energy in the surrounding environment and charges it to supply power to each functional module.

[0028] In one embodiment, the on-board unit 4 further includes a second energy storage module, an optical fiber communication interface 403, a microprocessor, and a power supply interface 404. Among them, The first end of the second energy storage module is connected to the signal receiving coil 401, the second end of the second energy storage module is connected to the first end of the power supply interface 404, the second end of the power supply interface 404 is connected to the first end of the microprocessor, and the second end of the microprocessor is connected to the first end of the optical fiber communication interface 403.

[0029] In this embodiment, the power supply interface 404 is arranged between the microprocessor and the signal transmitting coil. When the valve structure assembly (100) works and there is an electromagnetic signal in the surrounding environment, it absorbs the electromagnetic signal energy in the surrounding environment and stores it to supply power to the microprocessor and the signal receiving coil simultaneously. Specifically, the first end of the second energy storage module is connected to the signal receiving coil 401, the second end of the second energy storage module is connected to the first end of the power supply interface 404, the second end of the power supply interface 404 is connected to the first end of the microprocessor, and the second end of the microprocessor is connected to the optical fiber communication interface 403.

[0030] In one embodiment, the on-board unit 4 further includes a modulator. Among them, The modulator is connected to the second end of the second signal processing module 402.

[0031] In this embodiment, the second signal processing circuit is also connected to the modulator, the electromagnetic energy storage module, and the signal transmitting coil at the same time. It uses a lightweight control chip to receive the electromagnetic detection signal sent by the modulator and complete the processing and judgment of the detection signal.

[0032] In one embodiment, the number of sampling points is 4.

[0033] In this embodiment, four sampling points are selected on the surface of the power electronic device 1 to fix the low-power magnetoelectric sensor 6.

[0034] In one embodiment, the on-board unit 4 further includes a host computer, and the second end of the optical fiber communication interface 403 is connected to the host computer.

[0035] In this embodiment, the on-board unit 4 further includes a host computer. The optical fiber communication interface 403 is connected after the microprocessor and uniformly sends the detection data and feedback information processed by the microprocessor to the host computer. Specifically, the second end of the optical fiber communication interface 403 is connected to the host computer.

[0036] The power electronic device drive module detection method provided by the embodiment of the present invention, as Figure 6 shown, Figure 6 is a flowchart of the power electronic device drive module detection method, including steps S601 to S603. Specifically: S601: Collect the current signal when the power electronic device is in the blocking state.

[0037] In this embodiment, a detection coil made of a high magnetic permeability material is used to detect that the power electronic device in the valve structure assembly is in the blocking state during the switching operation. Specifically, first, the detection coil in the detection unit is used to collect the current flowing through the power electronic device in the blocking state, as well as the change of the current within a certain working cycle, to obtain the current signal.

[0038] S602: Control the detection unit to convert the current signal into an electromagnetic detection signal and send the electromagnetic detection signal to the on-board unit.

[0039] In this embodiment, the collected current signal is sent to the first signal processing module of the detection unit, and the electromagnetic induction effect is used to convert the current signal in the blocking state during the switching operation of the power electronic device into an electromagnetic detection signal and transmit it to the on-board unit.

[0040] S603: Control the on-board unit to analyze and process the electromagnetic detection signal to obtain the working state of the power electronic device.

[0041] In this embodiment, the on-board unit makes a judgment based on the received electromagnetic detection signal. Specifically, a non-intrusive sensor is used to measure and analyze the electromagnetic signal of the power electronic device during normal switching operation, detect the alternating magnetic field generated by the alternating current of the power electronic device, and judge the magnitude of the leakage current by detecting the magnetic induction intensity generated by the leakage current, so as to reflect the overall performance and fault conditions of the operation of the power electronic device. When the leakage current changes, the actually measured detection voltage also changes accordingly. According to the change of the detection voltage, it is analyzed and judged whether the reliability parameters of the power electronic device of the valve structure are normal. The change of the detection voltage detected by detecting the electromagnetic induction intensity is as follows: Table 1 Voltage change situation In one embodiment, controlling the on-board unit to analyze and process the electromagnetic detection signal to obtain the working state of the power electronic device includes: Controlling the on-board unit to perform modulation processing on the electromagnetic detection signal to obtain the modulation processing result; Judging whether the electromagnetic detection signal meets the control conditions according to the modulation processing result. If it meets, analyze and process the modulation processing result to obtain the working state of the power electronic device.

[0042] In this embodiment, after the signal receiving coil receives the electromagnetic detection signal and performs modulation processing on the electromagnetic detection signal, after obtaining the modulation processing result, based on the modulation processing result, it is determined whether the electromagnetic detection signal meets the control conditions. If it meets, effective information extraction is performed. Specifically, after using low-pass filtering to remove the residual high-frequency noise in the modulation processing result, feature extraction is performed to obtain the leakage current value, and then the working state of the power electronic device is judged according to the leakage current value.

[0043] It should be noted that modulation processing refers to converting the electromagnetic detection signal into a form suitable for transmission or isolation. The specific methods include, but are not limited to, amplitude modulation, frequency modulation, pulse frequency modulation, etc. The control condition is the technical boundary condition set by the system for the electromagnetic detection signal, which can be set according to actual needs and includes, but is not limited to, defining from multiple dimensions such as amplitude, frequency, time sequence, energy, modulation, etc.

[0044] In one embodiment, an electromagnetic signal is collected, converted into direct current electrical energy, and then sent to the first energy storage module and the second energy storage module for storage.

[0045] In this embodiment, the first energy storage module and the second energy storage module can absorb the electromagnetic signal energy in the surrounding environment and charge it during the operation of the power electronic device valve group to supply power to each functional module.

[0046] In one embodiment, after obtaining the working state of the power electronic device, it further includes: The control board-mounted unit sends the working state of the power electronic device to the host computer through the drive module.

[0047] In this embodiment, after the board-mounted module receives the electromagnetic detection signal, it performs data processing to obtain the working state of the power electronic device, and then passes the obtained working state of the power electronic device to the host computer through the drive module.

[0048] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0049] The specific embodiments described above have further detailed the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A detection device for a power electronic device drive module, characterized in that, It includes a detection unit (3), an on-board unit (4) and a valve structure assembly (100). The valve structure assembly (100) includes a power electronic device (1) and a radiator (2), and one side of the power electronic device (1) is connected to one side of the radiator (2). The detection unit (3) at least includes a detection coil (301), a first signal processing module (302), a signal transmitting coil, a wireless signal transmitting module (304) and a plurality of sensors (6). The detection coil (301) forms a closed-loop structure around the surface of the power electronic device (1) for one week. Each of the sensors (6) is respectively fixed under several sampling points of the detection coil (301). One end of the detection coil (301) is connected to the first end of the first signal processing module (302). The second end of the first signal processing module (302) is connected to the first end of the signal transmitting coil. The second end of the signal transmitting coil is connected to the first end of the wireless signal transmitting module (304). The second end of the wireless signal transmitting module (304) is connected to the on-board unit (4). The on-board unit (4) at least includes a signal receiving coil (401) and a second signal processing module (402). The first end of the signal receiving coil (401) is connected to the detection unit (3), and the second end of the signal receiving coil (401) is connected to the first end of the second signal processing module (402). The detection unit (3) is arranged on the other side of the radiator (2), and the on-board unit (4) is arranged on the drive board of the power electronic device (1). The detection unit (3) communicates with the on-board unit (4).

2. The power electronic device drive module detection device according to claim 1, characterized in that, The detection unit (3) further includes a first energy storage module (303), wherein One end of the detection coil (301) is connected to the first end of the first energy storage module (303), and the first end of the first signal processing module (302) and the first end of the wireless signal transmitting module (304) are respectively connected to the second end of the first energy storage module (303).

3. The power electronic device drive module detection device according to claim 1, characterized in that, The on-board unit (4) further includes a second energy storage module, an optical fiber communication interface (403), a microprocessor and a power supply interface (404), wherein The first end of the second energy storage module is connected to the signal receiving coil (401), the second end of the second energy storage module is connected to the first end of the power supply interface (404), the second end of the power supply interface (404) is connected to the first end of the microprocessor, and the second end of the microprocessor is connected to the first end of the optical fiber communication interface (403).

4. The detection device for a power electronic device drive module according to claim 1, characterized in that, The on-board unit (4) further includes a modulator, wherein The modulator is connected to the second end of the second signal processing module (402).

5. The detection device for a power electronic device drive module according to claim 1, characterized in that, The number of the sampling points is 4.

6. The detection device for a power electronic device drive module according to claim 3, characterized in that, The on-board unit (4) further includes a host computer, and the second end of the optical fiber communication interface (403) is connected to the host computer.

7. A detection method for a power electronic device drive module, characterized in that, It is realized by the power electronic device drive module detection device according to any one of claims 1-6, and includes: Collect the current signal of the power electronic device in the blocking state; Control the detection unit to convert the current signal into an electromagnetic detection signal and send the electromagnetic detection signal to the on-board unit; Control the on-board unit to analyze and process the electromagnetic detection signal to obtain the working state of the power electronic device.

8. The detection method of the power electronic device drive module according to claim 7, characterized in that, The control of the on-board unit to analyze and process the electromagnetic detection signal to obtain the working state of the power electronic device includes: Control the on-board unit to perform modulation processing on the electromagnetic detection signal to obtain a modulation processing result; Judge whether the electromagnetic detection signal meets the control conditions according to the modulation processing result. If it meets, analyze and process the modulation processing result to obtain the working state of the power electronic device.

9. The detection method of the power electronic device drive module according to claim 7, characterized in that It further includes: Collect electromagnetic signals, convert the electromagnetic signals into DC electric energy and send them to the first energy storage module and the second energy storage module for storage.

10. The detection method of the power electronic device drive module according to claim 7, wherein After obtaining the working state of the power electronic device, it further includes: Control the on-board unit to send the working state of the power electronic device to the host computer through the drive module.

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