Maintenance device and method for frequency converter of wind driven generator

Abstract

The maintenance device comprises a filtering mechanism, one end of the filtering mechanism is in threaded connection with an ash removal mechanism, the other end of the filtering mechanism is in threaded connection with an air draft mechanism, and the surface of the air draft mechanism is fixedly connected with a control mechanism; the filtering mechanism comprises a mounting shell, and external thread rings are fixedly connected to the left end and the right end of the mounting shell; the ash removal mechanism comprises a first internal thread ring, and the first internal thread ring is arranged on the surface of the external thread ring at one end in a threaded and sleeving mode. The device has the advantage of efficient maintenance, and solves the problems that the shutdown time of a wind driven generator is too long and the maintenance cost of the wind driven generator is increased due to the fact that an IGBT and a driving plate of the frequency converter are inconvenient to efficiently replace when the frequency converter of the wind driven generator is maintained by a worker.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, in particular to a maintenance device and method for a wind generator frequency converter. Background Art

[0002] In the wind power generation sector, inverters are a key component in converting the unstable AC power generated by wind turbines into stable DC power. However, high temperatures pose a significant challenge to the proper operation of inverters, particularly for their core components: insulated-gate bipolar transistors (IGBTs). Sustained operation in high-temperature conditions not only accelerates the aging of the IGBTs themselves but, more importantly, causes the AGDRs on the driver boards to age. This aging of the AGDRs ultimately renders them unable to properly drive the IGBTs, potentially causing them to lose effective current control and trigger an overcurrent fault alarm. More seriously, if the IGBTs cannot withstand the excessive current load, they can explode. The resulting arc flash is extremely destructive, often affecting other surrounding boards and causing even greater damage.

[0003] When staff are repairing the wind turbine inverter, it is inconvenient to efficiently replace the inverter's IGBT and driver board, resulting in excessively long wind turbine downtime and increased wind turbine maintenance costs. Summary of the Invention

[0004] The object of the present invention is to provide a maintenance device and method for a wind turbine inverter, which has the advantage of efficient maintenance and solves the problem that when workers are repairing the wind turbine inverter, it is inconvenient to efficiently replace the IGBT and drive board of the inverter, resulting in excessively long downtime of the wind turbine and increased maintenance costs of the wind turbine.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a maintenance device for a wind turbine inverter, comprising a filter mechanism, one end of the filter mechanism being threadedly connected to a dust cleaning mechanism, the other end of the filter mechanism being threadedly connected to an exhaust mechanism, and a control mechanism being fixedly connected to a surface of the exhaust mechanism;

[0006] The filtering mechanism includes a mounting shell, and both left and right ends of the mounting shell are fixedly connected to external threaded rings;

[0007] The dust cleaning mechanism includes a first internal thread ring, which is threadedly sleeved on the surface of an external thread ring at one end;

[0008] The exhaust mechanism includes a second internal thread ring, which is threadedly sleeved on the surface of the external thread ring at the other end.

[0009] As a preferred maintenance device for a wind turbine inverter of the present invention, a mounting seat is mounted on the inner wall of the mounting shell by bolts, and a filter element is fixedly connected to the inner wall of the mounting seat.

[0010] As a preferred maintenance device for a wind turbine inverter of the present invention, one end of the first internal thread ring is fixedly connected to a flat-mouth cleaning nozzle, one end of the flat-mouth cleaning nozzle is movably sleeved with a round-mouth cleaning nozzle, and one end of the round-mouth cleaning nozzle is movably sleeved with a cleaning tip.

[0011] As a preferred maintenance device for a wind turbine inverter of the present invention, the top of the round-mouth cleaning nozzle is fixedly connected to a first mounting piece, the top of the cleaning tip is fixedly connected to a second mounting piece, the bottom of the second mounting piece is movably connected to the top of the first mounting piece, and the bottom of the first mounting piece is movably connected to the top of the first internal threaded ring.

[0012] As a preferred maintenance device for a wind turbine inverter of the present invention, manual bolts are threadedly connected to the first internal threaded ring, the first mounting member, and the second mounting member.

[0013] As a preferred maintenance device for a wind turbine inverter of the present invention, one end of the second internal threaded ring is fixedly connected to an exhaust hopper, the inner wall of the exhaust hopper is fixedly connected to a motor, and the output shaft of the motor is fixedly connected to a fan blade.

[0014] As a preferred maintenance device for a wind turbine inverter of the present invention, one end of the exhaust hopper is fixedly connected to a filter.

[0015] As a preferred maintenance device for a wind turbine inverter of the present invention, the control mechanism includes a battery, the battery is fixedly connected to the surface of the exhaust scoop, and a controller is fixedly connected to the left side of the battery.

[0016] As a preferred maintenance device for a wind turbine inverter of the present invention, a handle is fixedly connected to the top of the battery, and a charging interface is provided on the surface of the battery.

[0017] A maintenance method for a wind turbine inverter comprises the following steps:

[0018] S1. First, disconnect the power supply, disconnect the inverter Q1 switch, the control cabinet F11 and F12 switches, and the 400V switch at the bottom of the tower cabinet, and hang a warning sign that reads "Do not close the switch, someone is working" to avoid misoperation. Then, perform an electrical test to confirm that there is no voltage.

[0019] S2. Remove the original components in the module, use tools to remove the module cover, remove the heating plate, and properly store the screws. Continue to remove the control panel, fan power control board and IGBT, and use the maintenance device of the wind turbine inverter to remove dust and clean it to improve the efficiency of maintenance.

[0020] S3. Replace the new IGBT and driver board, install the new IGBT and capacitor, install the driver board on the PCB support column, check the installation clearance, connect the cables between the driver board and the IGBT, and reinstall the previously removed control panel and heating plate.

[0021] S5. Upgrade the ventilation circuit by installing an air switch and AC contactor in the tower base cabinet or control cabinet, installing a plastic junction box in the power cabinet, installing power supply line cables, adding auxiliary contacts to the control circuit, connecting the control circuit, and replacing the input terminal of the D2D fan.

[0022] S6. Overall performance test: Use a multimeter to detect the main circuit of the power module, remove the warning sign, gradually restore the power supply, perform a charging experiment, check the waveform, status word and the working condition of the cooling fan, perform a zero-speed experiment, and further confirm the system status. If the above steps are normal, the wind turbine can be started.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention can clean dust according to actual needs through the coordinated use of a flat-mouth cleaning nozzle, a round-mouth cleaning nozzle and a cleaning tip. It is suitable for gaps and spaces of different sizes, making the dust cleaning inside the inverter more thorough. Moreover, the flat-mouth cleaning nozzle, the round-mouth cleaning nozzle and the cleaning tip can be replaced, which can adapt to a variety of cleaning scenarios and improve the flexibility of equipment use.

[0025] 2. The present invention realizes rapid assembly and disassembly of various components through threaded connection, simplifies the maintenance process of the equipment, and facilitates maintenance operations such as replacing the filter element. The filter element effectively prevents secondary pollution of dust and improves safety during the cleaning process. Regular internal cleaning can effectively extend the service life of the inverter and avoid problems such as overheating due to dust accumulation. By efficiently cleaning internal components, the frequency of failures caused by dust accumulation is reduced, and maintenance costs are indirectly reduced.

[0026] 3. The present invention ensures the safety of workers by cutting off the power before maintenance and avoids the risk of electric shock caused by live operation. Through orderly steps, from disassembly to replacement of new parts to reassembly, each step has clear operating instructions, which helps to ensure the quality of maintenance. The use of special maintenance equipment for dust removal and cleaning not only improves the cleaning efficiency, but also ensures the thoroughness of cleaning and prevents dust from causing further damage to the equipment. By upgrading the ventilation circuit, the heat dissipation conditions of the equipment are improved, which helps to reduce the failure rate caused by high temperature and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the present invention Figure 1 ;

[0028] Figure 2 Schematic diagram of the structure of the present invention Figure 2 ;

[0029] Figure 3 This is an exploded view of the filtering mechanism of the present invention;

[0030] Figure 4 This is an exploded view of the dust cleaning mechanism of the present invention;

[0031] Figure 5 This is an exploded view of the exhaust mechanism of the present invention;

[0032] Figure 6 Schematic diagram of the control mechanism structure of the present invention.

[0033] In the figure: 1. Filter mechanism; 101. Mounting shell; 102. Filter element; 103. Mounting seat; 104. External threaded ring; 2. Cleaning mechanism; 201. First internal threaded ring; 202. Flat-mouth cleaning nozzle; 203. Round-mouth cleaning nozzle; 204. Cleaning tip; 205. Second mounting part; 206. First mounting part; 207. Manual bolt; 3. Exhaust mechanism; 301. Second internal threaded ring; 302. Exhaust hopper; 303. Motor; 304. Fan blades; 305. Filter; 4. Control mechanism; 401. Battery; 402. Charging port; 403. Controller; 404. Handle. DETAILED DESCRIPTION

[0034] Example 1

[0035] See also Figures 1-6 A maintenance device for a wind turbine inverter includes a filter mechanism 1, one end of the filter mechanism 1 is threadedly connected to a dust cleaning mechanism 2, the other end of the filter mechanism 1 is threadedly connected to an exhaust mechanism 3, and the surface of the exhaust mechanism 3 is fixedly connected to a control mechanism 4.

[0036] Furthermore, the filter mechanism 1 includes a mounting shell 101 , and both left and right ends of the mounting shell 101 are fixedly connected with external threaded rings 104 .

[0037] Furthermore, a mounting seat 103 is mounted on the inner wall of the mounting shell 101 by means of bolts, and a filter element 102 is fixedly connected to the inner wall of the mounting seat 103 .

[0038] Furthermore, the dust cleaning mechanism 2 includes a first internal thread ring 201 , which is threadedly sleeved on the surface of the external thread ring 104 at one end.

[0039] Furthermore, one end of the first internal thread ring 201 is fixedly connected to a flat-mouth cleaning nozzle 202 , one end of the flat-mouth cleaning nozzle 202 is movably sleeved with a round-mouth cleaning nozzle 203 , and one end of the round-mouth cleaning nozzle 203 is movably sleeved with a cleaning tip 204 .

[0040] Furthermore, the top of the round-mouth cleaning nozzle 203 is fixedly connected to a first mounting member 206, the top of the cleaning tip 204 is fixedly connected to a second mounting member 205, the bottom of the second mounting member 205 is movably connected to the top of the first mounting member 206, and the bottom of the first mounting member 206 is movably connected to the top of the first internal threaded ring 201.

[0041] Furthermore, manual bolts 207 are threadedly connected to the first internal thread ring 201 , the first mounting member 206 and the second mounting member 205 .

[0042] Furthermore, the exhaust mechanism 3 includes a second internal thread ring 301 , which is threadedly sleeved on the surface of the external thread ring 104 at the other end.

[0043] Furthermore, one end of the second internal thread ring 301 is fixedly connected to the exhaust hopper 302 , the inner wall of the exhaust hopper 302 is fixedly connected to the motor 303 , and the output shaft of the motor 303 is fixedly connected to the fan blade 304 .

[0044] Furthermore, a filter 305 is fixedly connected to one end of the exhaust hopper 302 .

[0045] Furthermore, the control mechanism 4 includes a battery 401 , which is fixedly connected to the surface of the exhaust hopper 302 , and a controller 403 is fixedly connected to the left side of the battery 401 .

[0046] Furthermore, a handle 404 is fixedly connected to the top of the battery 401 , and a charging port 402 is provided on the surface of the battery 401 .

[0047] When the staff needs to clean the dust, they first ensure that the filter element 102 is installed in the mounting shell 101, and fix the mounting seat 103 with bolts, and connect the first internal threaded ring 201 of the cleaning mechanism 2 with the external threaded ring 104 at one end of the mounting shell 101 through threads. According to the needs of cleaning, select the flat-mouth cleaning nozzle 202, the round-mouth cleaning nozzle 203 and the cleaning tip 204. The flat-mouth cleaning nozzle 202, the round-mouth cleaning nozzle 203 and the cleaning tip 204 can extract dust from different gaps to meet the space cleaning needs inside the inverter. When the round-mouth cleaning nozzle 203 or the cleaning tip 204 is selected, install the first mounting part 206 or the second mounting part 205 on the first internal threaded ring 201, and finally tighten it with manual bolts 207 to connect the second internal threaded ring 301 of the exhaust mechanism 3 with the external threaded ring 104 at the other end of the mounting shell 101.

[0048] After the installation is completed, check whether the battery 401 has sufficient power, and charge it as necessary through the charging interface 402. Use the controller 403 to start the motor 303. The motor 303 drives the fan blades 304 to rotate to generate airflow, so that negative pressure is generated inside the filter mechanism 1 and the cleaning mechanism 2. Aim the flat-mouth cleaning nozzle 202, the round-mouth cleaning nozzle 203 or the cleaning tip 204 at the part that needs to be cleaned, turn on the airflow for extraction, and the dust will be brought into the installation shell 101 by the airflow, filtered by the filter element 102 and then discharged. After the filter element 102 has been used for a period of time, if it is found to be blocked or the effect is reduced, it is necessary to remove the mounting seat 103 and replace it with a new filter element 102. The air filtered by the filter element 102 is discharged through the filter screen 305.

[0049] By using the flat-mouth cleaning nozzle 202, the round-mouth cleaning nozzle 203 and the cleaning tip 204 in combination, dust can be cleaned according to actual needs. It is suitable for gaps and spaces of different sizes, making the dust cleaning inside the inverter more thorough. Moreover, the flat-mouth cleaning nozzle 202, the round-mouth cleaning nozzle 203 and the cleaning tip 204 can be replaced, which can adapt to a variety of cleaning scenarios and improve the flexibility of equipment use.

[0050] The threaded connection enables quick assembly and disassembly of various components, which simplifies the maintenance process of the equipment and facilitates maintenance operations such as replacing the filter element 102. The filter element 102 effectively prevents secondary contamination by dust and improves safety during the cleaning process. Regular internal cleaning can effectively extend the service life of the inverter and avoid problems such as overheating due to dust accumulation. By efficiently cleaning internal components, the frequency of failures caused by dust accumulation is reduced, indirectly reducing maintenance costs.

[0051] Example 2

[0052] See also Figures 1-6 A maintenance method for a wind turbine inverter comprises the following steps:

[0053] S1. First, disconnect the power supply, disconnect the inverter Q1 switch, the control cabinet F11 and F12 switches, and the 400V switch at the bottom of the tower cabinet, and hang a warning sign that reads "Do not close the switch, someone is working" to avoid misoperation. Then, perform an electrical test to confirm that there is no voltage.

[0054] S2. Remove the original components in the module, use tools to remove the module cover, remove the heating plate, and properly store the screws. Continue to remove the control panel, fan power control board and IGBT, and use the maintenance device of the wind turbine inverter to remove dust and clean it to improve the efficiency of maintenance.

[0055] S3. Replace the new IGBT and driver board, install the new IGBT and capacitor, install the driver board on the PCB support column, check the installation clearance, connect the cables between the driver board and the IGBT, and reinstall the previously removed control panel and heating plate.

[0056] S5. Upgrade the ventilation circuit by installing an air switch and AC contactor in the tower base cabinet or control cabinet, installing a plastic junction box in the power cabinet, installing power supply line cables, adding auxiliary contacts to the control circuit, connecting the control circuit, and replacing the input terminal of the D2D fan.

[0057] S6. Overall performance test: Use a multimeter to detect the main circuit of the power module, remove the warning sign, gradually restore the power supply, perform a charging experiment, check the waveform, status word and the working condition of the cooling fan, perform a zero-speed experiment, and further confirm the system status. If the above steps are normal, the wind turbine can be started.

[0058] By cutting off the power before maintenance, the safety of the staff is ensured and the risk of electric shock caused by live operation is avoided. Through orderly steps, from disassembly to replacement of new parts to reassembly, each step has clear operating instructions, which helps to ensure the quality of maintenance. The use of special maintenance equipment for dust removal and cleaning not only improves cleaning efficiency, but also ensures thorough cleaning and prevents dust from causing further damage to the equipment. By upgrading the ventilation circuit, the heat dissipation conditions of the equipment are improved, which helps to reduce the failure rate caused by high temperature and extend the service life of the equipment.

[0059] The overall performance test after maintenance ensures that the equipment is in good working condition before being put back into use, reducing subsequent problems caused by improper maintenance. Regularly performing such maintenance methods can be part of preventive maintenance, which helps to detect potential failures in advance and avoid major accidents. By reducing the occurrence of equipment failures through complete maintenance procedures, the maintenance costs in long-term operation can be reduced.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A maintenance device for a wind turbine inverter, comprising a filtering mechanism (1), characterized in that: One end of the filter mechanism (1) is threadedly connected to a dust cleaning mechanism (2), the other end of the filter mechanism (1) is threadedly connected to an exhaust mechanism (3), and the surface of the exhaust mechanism (3) is fixedly connected to a control mechanism (4); The filtering mechanism (1) comprises a mounting shell (101), and both left and right ends of the mounting shell (101) are fixedly connected with external threaded rings (104); The dust cleaning mechanism (2) comprises a first internal thread ring (201), wherein the first internal thread ring (201) is threadedly sleeved on the surface of an external thread ring (104) at one end; The air exhaust mechanism (3) comprises a second internal thread ring (301), wherein the second internal thread ring (301) is threadably sleeved on the surface of the external thread ring (104) at the other end.

2. The maintenance device for a wind turbine inverter according to claim 1, characterized in that: A mounting seat (103) is mounted on the inner wall of the mounting shell (101) by means of bolts, and a filter element (102) is fixedly connected to the inner wall of the mounting seat (103).

3. The maintenance device for a wind turbine inverter according to claim 1, characterized in that: One end of the first internal thread ring (201) is fixedly connected to a flat-mouth cleaning nozzle (202), one end of the flat-mouth cleaning nozzle (202) is movably sleeved with a round-mouth cleaning nozzle (203), and one end of the round-mouth cleaning nozzle (203) is movably sleeved with a cleaning tip (204).

4. The maintenance device for a wind turbine inverter according to claim 3 is characterized in that: The top of the round-mouth cleaning nozzle (203) is fixedly connected to a first mounting member (206), the top of the cleaning tip (204) is fixedly connected to a second mounting member (205), the bottom of the second mounting member (205) is movably connected to the top of the first mounting member (206), and the bottom of the first mounting member (206) is movably connected to the top of the first internal threaded ring (201).

5. The maintenance device for a wind turbine inverter according to claim 4, characterized in that: The first internally threaded ring (201), the first mounting member (206) and the second mounting member (205) are threadedly connected with manual bolts (207).

6. The maintenance device for a wind turbine inverter according to claim 1, characterized in that: One end of the second internally threaded ring (301) is fixedly connected to an air extraction hopper (302), an inner wall of the air extraction hopper (302) is fixedly connected to a motor (303), and an output shaft of the motor (303) is fixedly connected to a fan blade (304).

7. A maintenance device for a wind turbine inverter according to claim 6, characterized in that: One end of the air extraction hopper (302) is fixedly connected to a filter screen (305).

8. The maintenance device for a wind turbine inverter according to claim 7, characterized in that: The control mechanism (4) comprises a battery (401), the battery (401) is fixedly connected to the surface of the exhaust scoop (302), and a controller (403) is fixedly connected to the left side of the battery (401).

9. A maintenance device for a wind turbine inverter according to claim 8, characterized in that: A handle (404) is fixedly connected to the top of the storage battery (401), and a charging interface (402) is provided on the surface of the storage battery (401).

10. A maintenance method for a wind turbine inverter, applicable to a maintenance device for a wind turbine inverter according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, disconnect the inverter Q1 switch, the control cabinet F11 and F12 switches, and the 400V switch at the bottom of the tower, and hang a warning sign "Do not close the switch, someone is working" to avoid misoperation, and then perform an electrical test to confirm that there is no voltage; S2. Remove the original components in the module, use tools to remove the module cover, remove the heating plate, and properly save the screws. Continue to remove the control panel, fan power control board and IGBT, and use the maintenance device of the wind turbine inverter to remove dust and improve the efficiency of maintenance; S3, replace the new IGBT and driver board, install the new IGBT and capacitor, install the driver board to the PCB support column, check the installation gap, connect the cables between the driver board and the IGBT, and reinstall the control panel and heating plate that were disassembled before; S5, upgrade the ventilation circuit, install air switches and AC contactors in the tower bottom cabinet or control cabinet, install plastic junction boxes in the power cabinet, install power supply line connection wires, add auxiliary contacts in the control circuit, connect the control circuit, and replace the input end of the D2D fan; S6. Overall performance test. Use a multimeter to detect the main circuit of the power module. Remove the warning sign, gradually restore the power supply, conduct a charging experiment, check the waveform, status word and working condition of the cooling fan, perform a zero-speed experiment, and further confirm the system status. If the above steps are normal, the wind turbine can be started.

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