Wind turbine generator variable pitch motor extension line testing device based on encoder

Abstract

The utility model belongs to the technical field of testing devices, and particularly relates to a wind turbine generator variable-pitch motor extension line testing device based on an encoder, comprising a variable-pitch frequency converter, one end of which is provided with a variable-pitch frequency converter encoder signal interface; the variable-pitch motor is electrically connected with the variable-pitch frequency converter, and one end of the variable-pitch motor is provided with a variable-pitch motor encoder interface; and the two ends of the encoder extension cable are electrically connected with the variable-pitch frequency converter and the variable-pitch motor respectively. According to the utility model, the wind turbine generator set variable-pitch motor encoder test extension line is adopted to carry out cross validation on the functions of three variable-pitch devices, and a set of extension line of the variable-pitch control cabinet and the variable-pitch motor electrical connecting line is adopted to adapt to the variable-pitch motor encoder line interface so as to assist maintenance personnel in fault judgment and improve the maintenance efficiency. Fault processing time, boarding processing times and labor intensity can be reduced, the availability of a unit is improved, the power generation capacity is increased, and fault point positions can be quickly checked in a short time.

Description

Technical Field

[0001] The utility model belongs to the technical field of testing devices, and in particular relates to an encoder-based testing device for a variable pitch motor extension line of a wind turbine set. Background Art

[0002] Each blade pitch device of the wind turbine pitch system mainly consists of three parts, namely the pitch control part, the pitch motor-reducer part and the pitch bearing. The pitch control system achieves power change by changing the blade angle of attack. The pitch drive motor installed between the blade and the hub drives the slewing bearing to rotate, thereby changing the blade angle of attack, thereby controlling the lift of the blade and achieving control of the torque and power acting on the wind rotor blade;

[0003] By analyzing the reasons for the temporary shutdown of faulty components and systems of various types of wind turbines, it was found that the downtime caused by pitch system failure accounts for a relatively high proportion. Currently, there is no device that can quickly, effectively and clearly check the specific scope of pitch system failure, making it impossible to quickly check the location of the fault point in a short time.

[0004] In order to solve the above problems, the present application proposes an encoder-based wind turbine variable pitch motor extension line testing device. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a wind turbine variable pitch motor extension line test device based on an encoder, which has the characteristics of rapid troubleshooting.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: A wind turbine pitch motor extension line test device based on an encoder includes: a pitch inverter, one end of which is provided with a pitch inverter encoder signal interface; a pitch motor, the pitch motor is electrically connected to the pitch inverter, and one end of the pitch motor is provided with a pitch motor encoder interface; an encoder extension cable, the two ends of the encoder extension cable are respectively electrically connected to the pitch inverter and the pitch motor.

[0007] As a preferred embodiment of the utility model of an encoder-based wind turbine pitch motor extension line testing device, the pitch motors are multiple groups, and the multiple groups of pitch motors are respectively connected to pitch control cabinets.

[0008] As a preferred embodiment of the utility model of an encoder-based wind turbine pitch motor extension line testing device, there are multiple groups of pitch inverters, and the pitch inverters are arranged inside the pitch control cabinet, and the multiple groups of pitch inverters are electrically connected to the multiple groups of pitch motors in a one-to-one correspondence.

[0009] As a preferred embodiment of the utility model of an encoder-based wind turbine pitch motor extension line test device, a blade encoder is plugged into the pitch converter encoder signal interface, and a pitch motor encoder line plug is provided at one end of the blade encoder.

[0010] As a preferred embodiment of the utility model of an encoder-based wind turbine pitch motor extension cable testing device, both ends of the encoder extension cable are respectively provided with an encoder extension cable interface and an encoder extension cable plug.

[0011] As a preferred test device for the variable pitch motor extension line of a wind turbine set based on an encoder of the utility model, the encoder extension line interface is plugged into the variable pitch motor encoder line plug, and the encoder extension line plug is plugged into the variable pitch motor encoder interface.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model adopts a wind turbine pitch motor encoder test extension line to cross-verify the functions of the three pitch devices, and at the same time, through a set of pitch control cabinets and pitch motor electrical connection line extension lines, adapts the pitch motor encoder line interface to assist maintenance personnel in fault judgment, which can reduce fault handling time, boarding processing times and labor intensity, improve unit availability and increase power generation. The utility model has stable connection, good quality and meets signal transmission requirements, and can quickly locate the fault point in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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:

[0014] Figure 1 This is a schematic diagram of the connection of the wind turbine pitch motor encoder;

[0015] Figure 2 Electrical schematic diagram for extension cable of wind turbine pitch motor encoder;

[0016] Figure 3 This is one of the structural schematic diagrams of the encoder extension line interface in the utility model;

[0017] Figure 4 This is the second structural diagram of the encoder extension line interface in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the encoder extension cord plug in the utility model.

[0019] In the figure: 1. Pitch inverter; 2. Pitch inverter encoder signal interface; 3. Pitch motor encoder line plug; 4. Encoder extension line interface; 5. Encoder extension cable; 6. Encoder extension line plug; 7. Pitch motor encoder interface; 8. Pitch motor; 9. Pitch control cabinet; 10. Blade encoder. 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] Example 1

[0022] like Figure 1 and Figure 2 As shown;

[0023] A wind turbine variable pitch motor extension line test device based on an encoder, comprising:

[0024] A pitch converter 1, one end of which is provided with a pitch converter encoder signal interface 2;

[0025] A pitch motor 8, the pitch motor 8 is electrically connected to the pitch converter 1, and a pitch motor encoder interface 7 is provided at one end of the pitch motor 8;

[0026] An encoder extension cable 5, both ends of which are electrically connected to the pitch converter 1 and the pitch motor 8 respectively;

[0027] There are multiple groups of pitch motors 8 , and the multiple groups of pitch motors 8 are respectively connected to a pitch control cabinet 9 .

[0028] In this implementation scheme: a wind turbine pitch motor encoder test extension line is used to cross-verify the functions of the three pitch devices. At the same time, a set of pitch control cabinets and pitch motor electrical connection line extension lines are used to adapt the pitch motor encoder line interface to assist maintenance personnel in fault judgment. This can reduce fault handling time, boarding processing times and labor intensity, improve unit availability and increase power generation. The utility model has stable connection, good quality and meets signal transmission requirements, and can quickly locate the fault point in a short time.

[0029] In an optional embodiment, there are multiple groups of pitch inverters 1, and the pitch inverters 1 are arranged inside the pitch control cabinet 9, and the multiple groups of pitch inverters 1 are electrically connected to the multiple groups of pitch motors 8 in a one-to-one correspondence.

[0030] In an optional embodiment, a blade encoder 10 is plugged into the pitch converter encoder signal interface 2 , and a pitch motor encoder line plug 3 is provided at one end of the blade encoder 10 .

[0031] like Figure 3 , Figure 4 and Figure 5 As shown;

[0032] In an optional embodiment, an encoder extension cable 5 is provided with an encoder extension cable interface 4 and an encoder extension cable plug 6 at both ends respectively. The encoder extension cable interface 4 is plugged into the variable pitch motor encoder cable plug 3, and the encoder extension cable plug 6 is plugged into the variable pitch motor encoder interface 7.

[0033] In the present embodiment: because the original variable pitch motor 8 blade encoder 10 line length cannot realize cross-verification of the three variable pitch device functions, the present embodiment adopts the variable pitch motor 8 encoder extension cable 5 to connect the variable pitch motor variable pitch motor encoder line plug 3 and the variable pitch motor 8 encoder extension line interface 4, so as to realize cross-verification of the three variable pitch device functions in fault handling, and the variable pitch motor 8 encoder extension cable 5 is adaptable to all the variable pitch motor 8 encoder line interface connection plugs, cables, and interface-type electrical connection test extension cables.

[0034] The working principle and use process of the utility model: after the appearance inspection and electrical measurement of the pitch motor 8, no abnormality is found. If it is still judged that there is a problem with the blade encoder 10 inside the pitch motor 8, the electrical wiring on the second group of pitch motors 8 is disconnected, and the pitch motor 8 encoder extension cable 5 is used to connect the pitch motor encoder interface 7 of the first group of pitch motors 8 through the second group of pitch control cabinets 9 (the cabinet contains a pitch inverter 1). The pitch control cabinet 9 is connected to the remaining electrical connections of the first group of pitch motors 8, and then a manual start-up test is performed. This can assist in judging whether there is a problem with the blade encoder 10 inside the pitch motor 8 of the first group of drive devices. The second group of pitch motors The fault judgment of the blade encoder 10 inside the machine 8 and the blade encoder 10 inside the third group of pitch motors 8 is the same; if it is judged that there may be a problem with the components inside the first group of pitch control cabinets 9, the electrical wiring on the second group of pitch motors 8 is disconnected, and the encoder extension cable 5 is used through the first group of pitch control cabinets 9 to connect the pitch motor encoder interface 7 of the second group of pitch motors 8 and connect the first group of pitch control cabinets 9 and the remaining electrical wiring of the second group of pitch motors 8, and then manually perform a propeller start test, which can assist in determining whether there is a problem with the components inside the first group of pitch control cabinets 9. The fault judgment of the components inside the second and third groups of pitch control cabinets 9 is the same.

[0035] 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 wind turbine variable pitch motor extension line test device based on an encoder, characterized in that: include: A pitch converter (1), wherein one end of the pitch converter (1) is provided with a pitch converter encoder signal interface (2); A pitch motor (8), the pitch motor (8) being electrically connected to the pitch converter (1), and a pitch motor encoder interface (7) being provided at one end of the pitch motor (8); An encoder extension cable (5), wherein two ends of the encoder extension cable (5) are electrically connected to the variable pitch frequency converter (1) and the variable pitch motor (8) respectively.

2. The encoder-based wind turbine variable pitch motor extension line testing device according to claim 1 is characterized in that: The variable pitch motors (8) are multiple groups, and the multiple groups of variable pitch motors (8) are respectively connected to a variable pitch control cabinet (9).

3. The encoder-based wind turbine variable pitch motor extension line testing device according to claim 2 is characterized in that: There are multiple groups of pitch frequency converters (1), and the pitch frequency converters (1) are arranged inside the pitch control cabinet (9). The multiple groups of pitch frequency converters (1) are electrically connected to the multiple groups of pitch motors (8) in a one-to-one correspondence.

4. The encoder-based wind turbine variable pitch motor extension line testing device according to claim 1 is characterized in that: A blade encoder (10) is plugged into the pitch frequency converter encoder signal interface (2), and a pitch motor encoder line plug (3) is provided at one end of the blade encoder (10).

5. The encoder-based wind turbine variable pitch motor extension line testing device according to claim 4 is characterized in that: An encoder extension cable interface (4) and an encoder extension cable plug (6) are respectively provided at two ends of the encoder extension cable (5).

6. The encoder-based wind turbine variable pitch motor extension line testing device according to claim 5 is characterized in that: The encoder extension line interface (4) is plugged into the pitch motor encoder line plug (3), and the encoder extension line plug (6) is plugged into the pitch motor encoder interface (7).

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