Maintenance testing device for power unit of high-voltage frequency converter

Abstract

The utility model relates to the technical field of frequency converter maintenance, in particular to a high-voltage frequency converter power unit maintenance testing device, which comprises a control unit, an interactive processing unit, a power supply unit, a voltage regulation output unit, an analog quantity output unit and a digital quantity output unit, and the analog quantity output unit and the digital quantity output unit are both connected with the control unit. The control unit is connected with the interaction processing unit, and the power supply unit is connected with the analog quantity output unit, the digital quantity output unit and the control unit. According to the utility model, local maintenance testing of the high-voltage frequency converter power unit can be realized, faults of the high-voltage frequency converter power unit can be displayed and positioned, maintenance is performed in a targeted manner, and testing and maintenance are repeated until the high-voltage frequency converter power unit does not have faults. Therefore, the high-voltage frequency converter power unit is prevented from being returned to a factory for test and maintenance when having a fault, the maintenance cost is reduced, and the device is low in component cost and low in maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converter maintenance, and is a maintenance and test device for a high-voltage frequency converter power unit. Background Art

[0002] At present, the operation time of most boiler high-voltage frequency converters is close to 10 years, and the internal circuit boards, power units and other electronic components have aged, so the subsequent failure rate has also been continuously increasing. However, due to the lack of a professional power unit verification platform, the shift team cannot perform independent maintenance. Therefore, it is necessary to return the power unit to the factory for repair after a failure occurs. This maintenance method requires high maintenance costs, thus increasing the maintenance cost of the enterprise. Summary of the Invention

[0003] The utility model provides a maintenance and test device for a high-voltage frequency converter power unit, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problem that when a high-voltage frequency converter power unit fails in the prior art, it needs to be returned to the factory for testing and repair, and cannot be tested on-site, resulting in high maintenance costs.

[0004] The technical solution of the utility model is realized by the following measures: A maintenance and test device for a high-voltage frequency converter power unit includes a test environment setting integration unit, a control unit, an interaction processing unit and a power supply unit; the test environment setting integration unit includes a voltage regulation output unit, an analog quantity output unit and a digital quantity output unit, and both the analog quantity output unit and the digital quantity output unit are connected to the control unit; the control unit is connected to the interaction processing unit, and the power supply unit is respectively connected to the analog quantity output unit, the digital quantity output unit and the control unit.

[0005] The following is a further optimization and / or improvement of the above technical solution of the utility model:

[0006] The above analog quantity output unit may include a signal interface board and an analog quantity output unit. The AC voltage output end of the analog quantity output unit is connected to the input voltage feedback end of the signal interface board. The +15V power supply end and the +24V power supply end of the signal interface board are both connected to the power supply unit, and the analog quantity output end of the signal interface board is connected to the control unit.

[0007] The above digital quantity output unit may be a system I / O board. The peripheral digital quantity output end of the system I / O board is connected to the control unit. The +24V power supply end of the system I / O board is successively short-circuited to the remote prohibition end, the remote start end, the selection switch / remote end, the spare 1 end, the spare 2 end, the spare 3 end, the control power supply normal end, the cabinet door interlock end, the transformer over-temperature alarm 1 end, the transformer over-temperature alarm 2 end and the LFR status end. The +24V power supply end and the 5V end are both connected to the power supply unit.

[0008] The above control unit may include an internal I / O board, a microprocessing board, a power supply terminal, and an optical fiber interface terminal. The analog output unit and the digital output unit are both connected to the internal I / O board. The internal I / O board is connected to the microprocessing board, and the microprocessing board is connected to the interactive processing unit. Both the internal I / O board and the microprocessing board are connected to the power supply terminal, and the power supply terminal is connected to the power supply unit.

[0009] The above analog output unit is connected to the internal I / O board through a 50-core communication cable, and the digital output unit is connected to the internal I / O board through a 50-core communication cable and a 37-core communication cable.

[0010] The above voltage regulation output unit is a three-phase voltage regulator, and 3 test wires with a cross-sectional area of 2.5 mm2 are connected to the output terminal.

[0011] The above interactive processing unit is a terminal device.

[0012] The above power supply unit is a CPS power supply.

[0013] The structure of the present utility model is reasonable and compact, and it is convenient to use. Based on the voltage regulation output unit, the analog output unit, the digital output unit, the control unit, the interactive processing unit, and the power supply unit, the maintenance test of the high-voltage inverter power unit is realized. The faults existing in the high-voltage inverter power unit are displayed and located, and then targeted maintenance is carried out, and repeated testing and maintenance are carried out until there is no fault in the high-voltage inverter power unit. Thus, it avoids the return-to-factory test and repair when the high-voltage inverter power unit fails, reduces the maintenance cost, and the components used in this device have low cost and low maintenance cost. Description of the Drawings

[0014] Attached Figure 1 is a schematic structural diagram of a device of the present utility model.

[0015] Attached Figure 2 is another schematic structural diagram of a device of the present utility model. Detailed Embodiments

[0016] The present utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the present utility model and the actual situation.

[0017] The following describes the present utility model in further detail with reference to the embodiments and the drawings:

[0018] Embodiment 1, as attached Figure 1As shown in the figure, an embodiment of the utility model discloses a maintenance and test device for a power unit of a high-voltage frequency converter, which includes a test environment setting integration unit, a control unit, an interaction processing unit, and a power supply unit; the test environment setting integration unit includes a voltage regulation output unit, an analog quantity output unit, and a digital quantity output unit, and both the analog quantity output unit and the digital quantity output unit are connected to the control unit; the control unit is connected to the interaction processing unit, and the power supply unit is respectively connected to the analog quantity output unit, the digital quantity output unit, and the control unit.

[0019] In this embodiment, the test environment setting integration unit is used to set the normal operating environment required by the high-voltage frequency converter power unit before performing the high-voltage frequency converter power unit. According to the actual normal operating environment requirements, the test environment setting integration unit in this embodiment includes a voltage regulation output unit, an analog quantity output unit, and a digital quantity output unit, specifically as follows:

[0020] The voltage regulation output unit is used to input three-phase adjustable alternating current to the high-voltage frequency converter power unit to be tested, and can be a three-phase voltage regulator. The output voltage range is 0 to 430V, and the commonly used output voltage value during testing is 400V to 430V;

[0021] The analog quantity output unit is used to input an analog quantity to the high-voltage frequency converter power unit to be tested. This analog quantity is a medium-voltage given value, and the medium-voltage given value needs to meet the analog quantity given logic in the control unit;

[0022] The digital quantity output unit is used to input peripheral digital quantities to the high-voltage frequency converter power unit to be tested. This peripheral digital quantity is to short-circuit the required switch quantities, so as to meet the digital quantity given logic in the control unit. Here, the digital quantity given logic in the control unit is the switch quantity logic condition of the internal protection program of the frequency converter;

[0023] The control unit applies the received analog quantity and peripheral digital quantities to the high-voltage frequency converter power unit to be tested, receives the internal fault information returned by the high-voltage frequency converter power unit to be tested, and displays it to the interaction processing unit;

[0024] According to needs, the interaction processing unit is a terminal device, and a frequency converter debugging software is set inside. The frequency converter debugging software is a known public technology, and the specific model is determined according to the frequency converter manufacturer and model. That is, if it is a high-voltage frequency converter of Siemens, then the debugging software of Siemens is configured and installed, such as a terminal device with communication and data processing functions such as a computer or a tablet.

[0025] Based on the above circuit structure, the specific usage process of this embodiment includes:

[0026] (1) Connect the high-voltage frequency converter power unit to be tested to the voltage regulation output unit and the control unit respectively;

[0027] (2) Power on the control unit and connect it to the interactive processing unit for networking;

[0028] (3) The analog quantity output unit outputs the medium voltage set value to the control unit, and the digital quantity output unit outputs the peripheral digital quantity to the control unit;

[0029] (4) The voltage regulation output unit outputs three-phase alternating current to the power unit of the high-voltage inverter to be tested, and the control unit applies the peripheral digital quantity and the medium voltage set value to the power unit of the high-voltage inverter to be tested;

[0030] (5) The power unit of the high-voltage inverter to be tested operates in a normal operating environment and feeds back the operating data to the control unit;

[0031] (6) The control unit sends the operating data to the interactive processing unit, and the existing well-known inverter debugging software embedded in the interactive processing unit analyzes and displays the corresponding fault code according to the operating data, and this fault code corresponds to the internal fault of the power unit of the high-voltage inverter to be tested;

[0032] (7) The staff locates the fault according to the fault code and performs the corresponding repair actions on the power unit of the high-voltage inverter to be tested;

[0033] (8) After the repair is completed, loop through steps (1) to (7) until the interactive processing unit displays that there is no fault in the power unit of the high-voltage inverter to be tested.

[0034] The above utility model discloses a high-voltage inverter power unit maintenance and test device, which realizes the maintenance and test of the high-voltage inverter power unit based on the voltage regulation output unit, analog quantity output unit, digital quantity output unit, control unit, interactive processing unit and power supply unit, displays and locates the faults existing in the high-voltage inverter power unit, thereby performing targeted maintenance, and repeating the test and maintenance until there is no fault in the high-voltage inverter power unit, thus avoiding returning to the factory for test and repair when the high-voltage inverter power unit fails, reducing the maintenance cost, and the components used in this device have low cost and low maintenance cost.

[0035] Embodiment 2, as shown in the appendix Figure 2 As shown, the present embodiment of the utility model discloses a high-voltage inverter power unit maintenance and test device, wherein the power supply unit is a CPS power supply.

[0036] As shown in the appendix Figure 2 As shown, the CPS power supply includes a FAN END board, a G2 board, an E1 board, and an A6 board. Specifically, the CPS power supply is connected to 220V electricity, the G2 board outputs 15V voltage, the E1 board outputs 5V voltage, and the A6 board outputs 24V voltage.

[0037] Embodiment 3, as shown in the appendixFigure 2 As shown in the figure, an embodiment of the utility model discloses a maintenance and test device for a high-voltage frequency converter power unit. The analog quantity output unit further includes a signal interface board and an analog quantity output unit. The AC voltage output terminal of the analog quantity output unit is connected to the input voltage feedback terminal of the signal interface board. The +15V power supply terminal and the +24V power supply terminal of the signal interface board are both connected to the power supply unit. The analog quantity output terminal of the signal interface board is connected to the control unit.

[0038] As shown in the attached Figure 2 figure, the analog quantity output unit includes a signal interface board SCB and an analog quantity output unit. The signal interface board builds a signal circuit between the analog quantity output unit and the control unit. The signal interface board SCB has the characteristics of fast signal transmission speed, strong anti-interference ability, high safety, and long transmission distance.

[0039] The analog quantity output unit can be a known relay protection calibrator for outputting three-phase AC voltage signals of 0 to 2.5V. The input voltage feedback terminals (terminals 1, 3, 5), +15V power supply terminals (terminals 2, 6, 4), +24V power supply terminals (terminals 47, 43), analog quantity output terminals (terminal P1), and terminal J3 are arranged on the signal interface board. Specifically, the input voltage feedback terminals are connected to the AC voltage output terminals of the relay protection calibrator through 3 test leads of 1.5mm 2 to receive three-phase AC voltage signals of 0 to 2.5V. The +15V power supply terminals (terminals 2, 6, 4) are connected to the G2 board of the CPS power supply. The +24V power supply terminals (terminals 47, 43) are connected to the A6 board of the CPS power supply. The analog quantity output terminal (terminal P1) is connected to the control unit, and terminal J3 is grounded.

[0040] Example 4, as shown in the attached Figure 2 figure, an embodiment of the utility model discloses a maintenance and test device for a high-voltage frequency converter power unit. The digital quantity output unit is a system I / O board. The peripheral digital quantity output terminals of the system I / O board are connected to the control unit. The +24V power supply terminal of the system I / O board is sequentially short-circuited to the remote prohibition terminal, remote start terminal, selector switch / remote terminal, spare 1 terminal, spare 2 terminal, spare 3 terminal, control power supply normal terminal, cabinet interlock terminal, transformer over-temperature alarm 1 terminal, transformer over-temperature alarm 2 terminal, and LFR status terminal. The +24V power supply terminal and the 5V terminal are both connected to the power supply unit.

[0041] As shown in the attached Figure 2As shown in the figure, the digital output unit is the system I / O board. Specifically, on the system I / O board, there are peripheral digital output terminals (terminals J1, J17), terminal J16, 5V power supply terminals (terminals J20-1, J20-2, J20-3), +24V power supply terminals (terminals J11-11, J21-1), short-circuit remote inhibition terminal, remote start terminal, selector switch / remote terminal, spare 1 terminal, spare 2 terminal, spare 3 terminal, control power normal terminal, cabinet interlock terminal, transformer over-temperature alarm 1 terminal, transformer over-temperature alarm 2 terminal, and LFR status terminal (i.e., short-circuit remote inhibition terminal J8-1, remote start terminal J8-2, selector switch / remote terminal J9-2, spare 1 terminal J9-3, spare 2 terminal J9-4, spare 3 terminal J10-1, control power normal terminal J10-2, cabinet interlock terminal J10-3, transformer over-temperature alarm 1 terminal J10-4, transformer over-temperature alarm 2 terminal J11-7, and LFR status terminal J11-9). Specifically, terminal J16 is grounded, the 5V power supply terminals (terminals J20-1, J20-2, J20-3) are connected to the E1 board of the CPS power supply, the +24V power supply terminals (terminals J11-11, J21-1) are connected to the A6 board of the CPS power supply, terminals J1 and J17 are both connected to the control unit, and the +24V power supply is short-circuited to the remote inhibition terminal J8-1, remote start terminal J8-2, selector switch / remote terminal J9-2, spare 1 terminal J9-3, spare 2 terminal J9-4, spare 3 terminal J10-1, control power normal terminal J10-2, cabinet interlock terminal J10-3, transformer over-temperature alarm 1 terminal J10-4, transformer over-temperature alarm 2 terminal J11-7, and LFR status terminal J11-9.

[0042] Embodiment 5, as shown in the appendix Figure 2 As shown in the figure, the embodiment of the present utility model discloses a high-voltage inverter power unit maintenance and test device, wherein the control unit further includes an internal I / O board SCB, a microprocessing board SBC, a power supply terminal, and an optical fiber interface terminal. The analog output unit and the digital output unit are both connected to the internal I / O board SCB. The internal I / O board SCB is connected to the microprocessing board SBC. The microprocessing board SBC is connected to the interactive processing unit. The internal I / O board SCB and the microprocessing board SBC are both connected to the power supply terminal. The power supply terminal is connected to the power supply unit.

[0043] As shown in the appendix Figure 2 As shown in the figure, the control unit includes an internal I / O board SCB, a microprocessing board SBC, a power supply terminal, and an optical fiber interface terminal.

[0044] Specifically, terminals P2, P3, and P4 are provided on the internal I / O board SCB. Terminal P2 is connected to terminal J1 of the digital quantity output unit through a 50-core communication cable. Terminal P3 is connected to terminal J17 of the digital quantity output unit through a 37-core communication cable to receive peripheral digital quantity signals. Terminal P4 is connected to terminal P1 of the signal interface board through a 50-core communication cable to receive analog quantity signals.

[0045] Specifically, the microprocessing board SBC is respectively connected to the internal I / O board SCB and the interaction device. An RJ45 terminal is provided on the microprocessing board SBC and is connected to the interaction processing unit through an optical fiber to achieve communication with the interaction processing unit.

[0046] Specifically, the power supply end includes terminals TX1, FAN1, and FAN2. Terminal TX1 is connected to the FAN END board of the CPS power supply through a 1.5mm plastic copper wire 2 Terminal FAN1 and FAN2 are connected to the A6 board of the CPS power supply through a 1.5mm plastic copper wire 2 to the A6 board of the CPS power supply.

[0047] Specifically, the optical fiber interface end (terminal R / T) is connected to the optical fiber port T / R of the high-voltage inverter power unit to be tested.

[0048] Based on the above-mentioned Embodiment 2 to Embodiment 5, the testing process of the high-voltage inverter power unit overhaul testing device includes:

[0049] (1) Connect the high-voltage inverter power unit to be tested to the output side of the three-phase voltage regulator and the optical fiber interface end (terminal R / T) of the control unit respectively;

[0050] (2) Power on the control unit and connect it to the computer through a network cable;

[0051] (3) The relay protection tester outputs a medium voltage set value, which is transmitted from the signal interface board SCB to the internal I / O board SCB. The +24V power supply end of the system I / O board is successively short-circuited to the remote prohibition end, remote start end, selector switch / remote end, spare 1 end, spare 2 end, spare 3 end, control power supply normal end, cabinet door interlock end, transformer overtemperature alarm 1 end, transformer overtemperature alarm 2 end, and LFR status end to output peripheral digital quantities to the internal I / O board SCB;

[0052] (4) The three-phase voltage regulator outputs three-phase alternating current to the high-voltage inverter power unit to be tested. After being processed by the microprocessing board SBC, the peripheral digital quantities and the medium voltage set value are applied to the high-voltage inverter power unit to be tested through a network cable;

[0053] (5) The high-voltage inverter power unit to be tested operates in a normal operating environment and feeds back operating data to the microprocessing board SBC;

[0054] (6) The microprocessor board SBC sends the operating data to the computer via a network cable. The existing well-known frequency converter debugging software embedded in the computer analyzes the operating data and displays the corresponding fault code, which corresponds to the internal fault of the high-voltage frequency converter power unit to be tested.

[0055] (7) The staff locates the fault according to the fault code and performs the corresponding repair actions on the high-voltage frequency converter power unit to be tested.

[0056] (8) After the repair is completed, steps (1) to (7) are executed cyclically until the computer shows that there is no fault in the high-voltage frequency converter power unit to be tested.

[0057] The above technical features constitute the best embodiment of the present utility model, which has strong adaptability and the best implementation effect. Non-essential technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

Claims

1. A high voltage inverter power unit maintenance and testing device, characterized in that: It includes a test environment setting integrated unit, a control unit, an interactive processing unit and a power supply unit; the test environment setting integrated unit includes a voltage regulation output unit, an analog output unit and a digital output unit, and the analog output unit and the digital output unit are both connected to the control unit; the control unit is connected to the interactive processing unit, and the power supply unit is respectively connected to the analog output unit, the digital output unit and the control unit.

2. The high-voltage inverter power unit maintenance and testing device according to claim 1 is characterized in that: The analog output unit includes a signal interface board and an analog output unit, the AC voltage output terminal of the analog output unit is connected to the input voltage feedback terminal of the signal interface board, the +15V power supply terminal and the +24V power supply terminal of the signal interface board are both connected to the power supply unit, and the analog output terminal of the signal interface board is connected to the control unit.

3. The high-voltage inverter power unit maintenance and testing device according to claim 1 or 2, characterized in that: The digital output unit is a system I / O board, and the peripheral digital output terminal of the system I / O board is connected to the control unit. The +24V power supply terminal of the system I / O board is short-circuited with the remote inhibit terminal, the remote start terminal, the selection switch / remote terminal, the spare 1 terminal, the spare 2 terminal, the spare 3 terminal, the control power normal terminal, the cabinet door interlock terminal, the transformer over-temperature alarm 1 terminal, the transformer over-temperature alarm 2 terminal and the LFR status terminal in sequence, and the +24V power supply terminal and the 5V terminal are both connected to the power supply unit.

4. The high-voltage inverter power unit maintenance and testing device according to claim 1 or 2, characterized in that: The control unit includes an internal I / O board, a microprocessor board, a power supply end and an optical fiber interface end. The analog output unit and the digital output unit are both connected to the internal I / O board, the internal I / O board is connected to the microprocessor board, the microprocessor board is connected to the interactive processing unit, the internal I / O board and the microprocessor board are both connected to the power supply end, and the power supply end is connected to the power supply unit.

5. The high-voltage inverter power unit maintenance and testing device according to claim 3, characterized in that: The analog output unit is connected to the internal I / O board via a 50-core communication cable, and the digital output unit is connected to the internal I / O board via a 50-core communication cable and a 37-core communication cable.

6. The high-voltage inverter power unit maintenance and testing device according to claim 1, 2 or 5, characterized in that: The voltage regulation output unit is a three-phase voltage regulator, with three 2.5mm 2 or / and, the interactive processing unit is a terminal device; or / and, the power supply unit is a CPS power supply.

7. The high-voltage inverter power unit maintenance and testing device according to claim 3, characterized in that: The voltage regulation output unit is a three-phase voltage regulator, with three 2.5mm 2 or / and, the interactive processing unit is a terminal device; or / and, the power supply unit is a CPS power supply.

8. The high-voltage inverter power unit maintenance and testing device according to claim 4, characterized in that: The voltage regulation output unit is a three-phase voltage regulator, with three 2.5mm 2 or / and, the interactive processing unit is a terminal device; or / and, the power supply unit is a CPS power supply.

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