Fault point detection device based on wind turbine generator converter unit

Abstract

The utility model belongs to the technical field of full-power converters of wind generating sets, in particular to a fault point detection device based on a converter unit of a wind generating set, which comprises a 220V alternating-current power supply and a detection component connected with the 220V alternating-current power supply. The detection assembly comprises a first circuit, an alternating current copper plate and a second circuit, the first circuit is connected with the alternating current copper plate, the second circuit is connected with the rectification power supply module, and the 220V alternating current power supply is connected with the direct current busbar through the rectification power supply module; the detection device is used for detecting the power unit module of the full-power converter, so that fault points can be quickly found, faults can be handled in a convenient and economical manner, the fault handling time can be shortened, and the operation and maintenance efficiency of the wind generating set is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of full-power converters of wind turbine generator sets, and in particular relates to a fault point detection device based on a converter unit of a wind turbine generator set. Background Art

[0002] The full-power converter of a wind turbine generator set is a device that can convert the AC power of a wind turbine generator into DC power, and then convert the DC power into AC power with the same frequency, phase, phase sequence and amplitude as the power grid. Its output power can reach its rated power.

[0003] The power module unit of the full power converter is a device that converts AC power into DC power, and can also convert DC power into AC power.

[0004] After checking the public (announcement) number: CN211018288U discloses a full-power converter for wind turbines. This technology discloses "including converter DC bus, machine-side rectifier, grid-side inverter, support capacitor, Chopper circuit, DC-DC power converter, backup power system and converter controller. The two sides of the converter DC bus are respectively connected to the machine-side rectifier and the grid-side inverter. The technical solution reduces the number of operating units inside the nacelle base of the wind turbine, saves design space, reduces equipment weight, and reduces equipment transportation costs. Technical effect";

[0005] Although this design can reduce the number of operating units inside the wind turbine nacelle base, save design space, reduce equipment weight, and reduce equipment transportation costs, it is difficult to determine the specific fault point in the operation and maintenance of the full-power converter of the wind turbine. The power module unit often causes the wind turbine to shut down due to damage to an internal board. In addition, the power unit is relatively expensive and the overall structure is large, making it difficult to replace.

[0006] Therefore, a fault point detection device based on a wind turbine converter unit is designed to solve the above problems. Utility Model Content

[0007] To solve the problems raised in the above background technology. The utility model provides a fault point detection device based on the converter unit of a wind turbine generator set, which can detect the power unit module of the full-power converter through the detection device, so as to quickly find the fault point, handle the fault in a convenient and economical way, and reduce the fault handling time, thereby greatly improving the operation and maintenance efficiency of the wind turbine generator set.

[0008] To achieve the above object, the utility model provides the following technical solutions: a fault point detection device based on a wind turbine converter unit, comprising a 220V AC power supply, and also comprising a detection component connected to the 220V AC power supply;

[0009] The detection component includes a first circuit, an AC copper plate and a second circuit. The first circuit is connected to the AC copper plate, and the second circuit is connected to a rectifier power module. The 220V AC power supply is connected to a DC busbar through the rectifier power module.

[0010] As a preferred embodiment of the utility model, a fault point detection device based on a wind turbine converter unit, the detection component also includes a detection board, a wiring terminal and a DSP board, the DC busbar is respectively connected to the detection board and the DSP board, and one end of the DSP board is connected to the wiring terminal.

[0011] As a preferred embodiment of the utility model, a fault point detection device based on a wind turbine converter unit is provided, wherein one end of the detection board is connected with a pin connection, and the connection terminal is connected with the DSP board via the pin connection.

[0012] As a preferred embodiment of the utility model, a fault point detection device based on a wind turbine converter unit is provided, wherein one end of the rectifier power module is connected to an optical fiber, and one end of the optical fiber is connected to a remote monitoring center.

[0013] As a preferred embodiment of the utility model, a fault point detection device based on a wind turbine converter unit is configured such that one end of the remote monitoring center is connected to an electrical signal, and one end of the electrical signal is connected to a monitoring screen.

[0014] Compared with the prior art, the beneficial effects of the utility model are: adding a detection component to the present application, detecting the power unit module of the full-power converter through the detection device, facilitating rapid locating of the fault point, handling the fault in a convenient and economical manner, facilitating reducing the fault handling time, and greatly improving the operation and maintenance efficiency of the wind turbine generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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:

[0016] Figure 1 It is a circuit diagram of the utility model;

[0017] In the figure:

[0018] 1. 220V AC power supply;

[0019] 2. Detection component; 21. First circuit; 22. AC copper plate; 23. Second circuit; 24. Rectifier power module; 25. DC busbar; 26. Detection board; 27. DSP board; 28. Pin connection; 29. ​​Terminal block; 210. Optical fiber; 211. Remote monitoring center; 212. Electrical signal; 213. Monitoring screen. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1 As shown;

[0022] A fault point detection device based on a wind turbine converter unit.

[0023] In this implementation scheme: After investigation, the public (announcement) number: CN211018288U discloses a full-power converter for a wind turbine. Although the design can reduce the number of operating units inside the wind turbine cabin base, save design space, reduce equipment weight, and reduce equipment transportation costs, it is difficult to determine the specific fault point in the operation and maintenance of the full-power converter for the wind turbine. The power module unit often causes the wind turbine to shut down due to damage to an internal board, and the power unit is relatively expensive, and the overall structure is large and difficult to replace. In order to solve this technical problem, a detection component 2 is added on this basis.

[0024] More specifically:

[0025] like Figure 1 As shown:

[0026] In combination with the above content: the detection component 2 includes a first circuit 21, an AC copper plate 22 and a second circuit 23. The first circuit 21 is connected to the AC copper plate 22, and the second circuit 23 is connected to the rectifier power module 24. The 220V AC power supply 1 is connected to the DC bus 25 through the rectifier power module 24.

[0027] In this implementation scheme: the device is connected to a 220V AC power supply 1 from the mains, and the 220V AC power supply 1 is divided into two paths. The first circuit 21 directly enters the AC copper plate 22 to provide AC power for the power module unit, and the second circuit 23 converts the voltage of the 220V AC power supply 1 into a 15V DC busbar 25 through a rectifier power module 24.

[0028] It should be noted that the power supply access and distribution module includes a 220V AC power supply 1 and can divide the power supply into two power supplies.

[0029] Going further:

[0030] In an optional embodiment, the detection component 2 also includes a detection board 26, a wiring terminal 29 and a DSP board 27, the DC busbar 25 is connected to the detection board 26 and the DSP board 27 respectively, and one end of the DSP board 27 is connected to the wiring terminal 29.

[0031] In this embodiment, the 15V DC busbar 25 converted by the rectifier power module 24 can provide a stable and reliable DC power supply for the detection board 26 and the DSP board 27 .

[0032] Going further:

[0033] In an optional embodiment, one end of the detection board 26 is connected to a pin connection 28 , and the connection terminal 29 is connected to the DSP board 27 through the pin connection 28 .

[0034] In this embodiment: the detection board 26 is connected to the wiring terminal 29 through the pin connection 28, provides power to the wiring terminal 29, and monitors key parameters such as the DC voltage of the wiring terminal 29 in real time. The DSP board 27 is loaded with a special program, receives the fault information and voltage data transmitted by the detection board 26, outputs the voltage data as a waveform, and adjusts the rectification process of the power module.

[0035] It should be noted that the pin connection 28 is a twenty-four pin terminal.

[0036] Going further:

[0037] In an optional embodiment, one end of the rectifier power module 24 is connected to an optical fiber 210 , and one end of the optical fiber 210 is connected to a remote monitoring center 211 .

[0038] In this embodiment, the DSP board 27 also has the function of converting data into optical signals. Through the optical signal conversion module, the DSP board 27 converts the detection data and fault information into optical signals so as to be transmitted to the remote monitoring center 211 through the optical fiber 210 .

[0039] Going further:

[0040] In an optional embodiment, one end of the remote monitoring center 211 is connected to the electrical signal 212 , and one end of the electrical signal 212 is connected to the monitoring screen 213 .

[0041] In this embodiment, the optical signal from the DSP board 27 is received through the optical fiber 210, converted into an electrical signal 212 and displayed on the monitoring screen 213. The operator can understand the operating status and fault conditions of the device in real time on the monitoring screen 213 and take timely measures to deal with them.

[0042] Working principle: This device is connected to a 220V AC power supply 1 from the mains, and the 220V AC power supply 1 is divided into two paths. The first circuit 21 directly enters the AC copper plate 22 to provide AC power for the power module unit. The second circuit 23 converts the voltage of the 220V AC power supply 1 into a 15V DC busbar 25 through the rectifier power module 24. The 15V DC busbar 25 converted by the rectifier power module 24 can provide a stable and reliable DC power supply for the detection board 26 and the DSP board 27. The detection board 26 is connected to the terminal 29 through the pin connection 28 to provide power for the terminal 29 and monitor the key parameters such as the DC voltage of the terminal 29 in real time. The DSP board 27 is loaded with a special program, receives the fault information and voltage data transmitted by the detection board 26, outputs the voltage data as a waveform, and adjusts the rectification process of the power module. The DSP board 27 also has the function of converting data into optical signals. Through the optical signal conversion module, the DSP board 27 converts the detection data and fault information into optical signals so as to be transmitted to the remote monitoring center 211 through the optical fiber 210, and receives the optical signal from the DSP board 27 through the optical fiber 210, converts it into an electrical signal 212 and displays it on the monitoring screen 213. The operator can understand the operating status and fault conditions of the device in real time on the monitoring screen 213 and take timely measures to deal with them.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fault point detection device based on a wind turbine converter unit, comprising a 220V AC power supply (1), characterized in that: It also includes a detection component (2) connected to the 220V AC power supply (1); The detection component (2) comprises a first circuit (21), an AC copper plate (22) and a second circuit (23); the first circuit (21) is connected to the AC copper plate (22), the second circuit (23) is connected to a rectifier power module (24), and the 220V AC power supply (1) is connected to a DC busbar (25) via the rectifier power module (24).

2. The fault point detection device based on the wind turbine converter unit according to claim 1 is characterized in that: The detection component (2) further comprises a detection board (26), a wiring terminal (29) and a DSP board (27); the DC busbar (25) is connected to the detection board (26) and the DSP board (27) respectively; and one end of the DSP board (27) is connected to the wiring terminal (29).

3. The fault point detection device based on the wind turbine converter unit according to claim 2 is characterized in that: One end of the detection board (26) is connected to a pin connection (28), and the connection terminal (29) is connected to the DSP board (27) through the pin connection (28).

4. The fault point detection device based on the wind turbine converter unit according to claim 1 is characterized in that: One end of the rectifier power module (24) is connected to an optical fiber (210), and one end of the optical fiber (210) is connected to a remote monitoring center (211).

5. The fault point detection device based on the wind turbine converter unit according to claim 4 is characterized in that: One end of the remote monitoring center (211) is connected to an electric signal (212), and one end of the electric signal (212) is connected to a monitoring screen (213).

Images