A variable pitch system test system

Abstract

The invention provides a variable pitch system test system, including a power distribution component, a power grid simulator, a first variable pitch system component, a test component, and a second variable pitch system component; one end of the power distribution component is connected to one end of the power grid simulator, the other end of the power grid simulator is connected to one end of the first variable pitch system component, the other end of the first variable pitch system component is connected to one end of the test component, the other end of the test component is connected to one end of the second variable pitch system component, and the other end of the second variable pitch system component is connected to the other end of the power distribution component; the test component includes reducer 1, reducer 2, and reducer 3, one end of the low-speed shaft of reducer 1 is connected to the high-speed shaft of reducer 2, and the low-speed shaft of reducer 1 is connected to the high-speed shaft of reducer 3. The test component described in the invention can fully test the variable pitch system, reduce research and development costs, and can be applied to factory inspection to achieve 100% full-load aging operation of batch products.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment testing, and in particular relates to a variable pitch system testing system. Background Art

[0002] The existing variable pitch system test platform uses a converted loading motor, servo drive, energy feedback unit and control system, which requires a large initial investment. After the power of the variable pitch system is increased, it is necessary to reselect a higher power motor and match the servo drive and energy feedback unit, which results in a high upgrade cost.

[0003] At the same time, the existing test platform can only load the variable pitch motor and verify the encoder function, but cannot verify the function of the limit switch and proximity switch.

[0004] With the continuous development of the wind power industry, the construction of low-speed wind farms on land and offshore wind farms requires wind turbines to be equipped with longer blades to improve wind energy capture capabilities. The variable pitch system is also gradually upgraded. The low-power variable pitch system no longer meets the current market requirements. It is replaced by a high-power variable pitch system. During the development process, the high-power variable pitch system has a high technical content and a relatively complex test environment. The traditional test platform cannot meet the test of the high-power variable pitch system, or the traditional test platform needs to re-purchase high-power loading motors and high-power supporting drivers, which is very expensive and no longer meets the production and R&D requirements.

[0005] In order to save resources, reduce the cost of upgrading the test platform, and at the same time ensure the convenience of moving the test bench, it is necessary to design a new type of high-power test platform. When equipped with a high-power energy feedback unit, this platform can fully test variable-pitch systems of different power levels and reduce R&D costs. Summary of the invention

[0006] In view of this, the invention aims to propose a variable pitch system test system to solve the problem that the variable pitch system test can only be performed on the same model and the same power, and the cost is extremely high.

[0007] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0008] A variable pitch system test system, comprising a power distribution component, a power grid simulator, a first variable pitch system component, a test component, and a second variable pitch system component;

[0009] One end of the power distribution component is connected to one end of the power grid simulator, the other end of the power grid simulator is connected to one end of the first pitch system component, the other end of the first pitch system component is connected to one end of the test component, the other end of the test component is connected to one end of the second pitch system component, and the other end of the second pitch system component is connected to the other end of the power distribution component;

[0010] The test assembly includes reducer 1, reducer 2, and reducer 3. One end of the first low-speed shaft of reducer 1 is connected to the high-speed shaft of reducer 2, and the second low-speed shaft of reducer 1 is connected to the high-speed shaft of reducer 3.

[0011] Furthermore, the reducer 1 is a double-input and double-output reducer, and the test component also includes a first variable pitch motor, a first coupling, a torque and speed sensor, and a second coupling. The other end of the first variable pitch motor is connected to one end of the first coupling, the other end of the first coupling is connected to one end of the torque and speed sensor, the other end of the torque and speed sensor is connected to one end of the second coupling, and the other end of the second coupling is connected to one end of the first high-speed shaft of the reducer 1.

[0012] Furthermore, the test assembly also includes: disc one and disc two, wherein disc one is installed at one end of the low-speed shaft of reducer two, and disc two is installed at one end of the low-speed shaft of reducer three.

[0013] Furthermore, the test component also includes a third coupling and a second pitch motor, one end of the third coupling is connected to one end of the second high-speed shaft of the reducer, the other end of the third coupling is connected to one end of the second pitch motor, and the other end of the second pitch motor is connected to the second pitch system component.

[0014] Furthermore, the first variable pitch system includes a first rectifier and a first inverter, one end of the first rectifier is connected to the other end of the power grid simulator, the other end of the first rectifier is connected to one end of the first inverter, and one end of the first inverter is connected to one end of the first variable pitch motor.

[0015] Furthermore, the power distribution component includes: a first molded case circuit breaker, a second molded case circuit breaker, and a third molded case circuit breaker, one end of the first molded case circuit breaker is connected to a power supply, the other end of the first molded case circuit breaker is connected to one end of the second molded case circuit breaker, the other end of the second molded case circuit breaker is connected to the other end of the power grid simulator, one end of the third molded case circuit breaker is connected to the circuit between the first molded case circuit breaker and the second molded case circuit breaker, and the other end of the third molded case circuit breaker is connected to the second pitch system component.

[0016] Furthermore, the second variable pitch system component includes a second rectifier, a second inverter, a reactor, and an energy feedback unit, one end of the second rectifier is connected to the other end of the third molded case circuit breaker, the other end of the second rectifier is connected to one end of the second inverter, the other end of the second inverter is connected to the other end of the second variable pitch motor, one end of the reactor is connected to the circuit between the third molded case circuit breaker and the second rectifier, the other end of the reactor is connected to one end of the energy feedback unit, and the other end of the energy feedback unit is connected to the circuit between the second rectifier and the second inverter.

[0017] Compared with the prior art, the pitch system test system created by the present invention has the following advantages:

[0018] (1) The test assembly of the present invention has a low initial investment cost, and the cost advantage is particularly obvious during upgrading. The platform has few components and is easy to move.

[0019] (2) The second variable pitch system and the supporting energy feedback unit created by the present invention replace the traditional loading system, and can enhance the test effect of the functional performance, FRT, grid adaptability, and high-temperature aging of the variable pitch system, reduce R&D costs, and realize simultaneous loading and operation of two variable pitch systems during factory inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of a variable pitch system test system described in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] Q0-first molded case circuit breaker; Q1-second molded case circuit breaker; Q2-third molded case circuit breaker; AC-grid simulator; V1-first rectifier; V2-first inverter; V3-second rectifier; V4-second inverter; M1-first variable pitch motor; M2-second variable pitch motor; L-reactor; E-energy feedback unit; A1-reducer one; T-torque speed sensor; A2-reducer two; A3-reducer three; C1-first coupling; C2-second coupling; C3-third coupling; D1-disc one; D2-disc two. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] like Figure 1 As shown, a pitch system test system includes a power distribution component, a power grid simulator AC, a first pitch system component, a test component, and a second pitch system component;

[0029] One end of the power distribution component is connected to one end of the power grid simulator AC, the other end of the power grid simulator AC is connected to one end of the first pitch system component, the other end of the first pitch system component is connected to one end of the test component, the other end of the test component is connected to one end of the second pitch system component, and the other end of the second pitch system component is connected to the other end of the power distribution component;

[0030] The test component includes reducer A1, reducer A2, and reducer A3. One end of the first low-speed shaft of reducer A1 is connected to the high-speed shaft of reducer A2, and the second low-speed shaft of reducer A1 is connected to the high-speed shaft of reducer A3. The upper mounting structure component of reducer A2 provides installation positions for the limit switches and proximity switches of the variable pitch system. The configuration of reducer A3 is the same as that of reducer A2 and is used to install the limit switches, encoders and proximity switches of the second variable pitch system component.

[0031] The reducer 1 is a double-input and double-output reducer, and the test component also includes a first variable pitch motor M1, a first coupling C1, a torque and speed sensor T, and a second coupling C2. The other end of the first variable pitch motor M1 is connected to one end of the first coupling C1, the other end of the first coupling C1 is connected to one end of the torque and speed sensor T, the other end of the torque and speed sensor T is connected to one end of the second coupling C2, and the other end of the second coupling C2 is connected to one end of the first high-speed shaft of the reducer 1 A1.

[0032] The test assembly also includes: disk 1 D1 and disk 2 D2. Disk 1 D1 is installed on one end of the low-speed shaft of reducer 2 A2, and disk 2 D2 is installed on one end of the low-speed rotating shaft of reducer 3 D3. Fixed blocks are installed on the outer edges of the disk diameters of disk 1 D1 and disk 2 D2, respectively, for triggering the limit switch of the variable pitch system assembly, and the other end is used to install a blade encoder. Bolts of appropriate sizes are installed on the sides of disk 1 D1 and disk D2, respectively, for triggering the proximity switch of the variable pitch system assembly.

[0033] The test assembly also includes a third coupling C3 and a second pitch motor M2. One end of the third coupling C3 is connected to one end of the second high-speed shaft of the reducer A1, and the other end of the third coupling C3 is connected to one end of the second pitch motor. The other end of the second pitch motor M2 is connected to the second pitch system assembly.

[0034] The first variable pitch system includes a first rectifier V1 and a first inverter V2. One end of the first rectifier V1 is connected to the other end of the grid simulator AC. The other end of the first rectifier V1 is connected to one end of the first inverter V2. One end of the first inverter V2 is connected to one end of the first variable pitch motor M1.

[0035] The power distribution component includes: a first molded case circuit breaker Q1, a second molded case circuit breaker Q2, and a third molded case circuit breaker Q3. One end of the first molded case circuit breaker Q1 is connected to a power supply, the other end of the first molded case circuit breaker Q1 is connected to one end of the second molded case circuit breaker Q2, the other end of the second molded case circuit breaker Q2 is connected to the other end of the power grid simulator AC, one end of the third molded case circuit breaker Q3 is connected to the circuit between the first molded case circuit breaker Q1 and the second molded case circuit breaker 2, and the other end of the third molded case circuit breaker Q3 is connected to the second pitch system component.

[0036] The second variable pitch system component includes a second rectifier V3, a second inverter V4, a reactor L, and an energy feedback unit E. One end of the second rectifier V3 is connected to the other end of the third molded case circuit breaker Q3, the other end of the second rectifier V3 is connected to one end of the second inverter V4, the other end of the second inverter V4 is connected to the other end of the second variable pitch motor M2, one end of the reactor L is connected to the circuit between the third molded case circuit breaker Q3 and the second rectifier V3, the other end of the reactor L is connected to one end of the energy feedback unit E, and the other end of the energy feedback unit E is connected to the circuit between the second rectifier V3 and the second inverter V4.

[0037] The control PLC realizes the collection and control of the two sets of pitch system components, torque and speed sensor T, power grid simulator AC, and molded case circuit breaker, and the control and status collection of the power quality of the first pitch system component.

[0038] The specific embodiments are as follows:

[0039] The platform control PLC is connected to the two sets of pitch system components through CAN / Profibus (EL 6751 / EL 6731) respectively to realize the control of the two sets of pitch system components; the torque and speed sensor T signal is input to the 4-20mA AI module (EL 3122) of the PLC through the signal converter, and the platform control PLC reads the real-time feedback data of the torque and speed sensor T; the platform control PLC is connected to the power grid simulator AC through RS485 (EL 6021) to realize the control of the AC output power of the power grid simulator; the platform control PLC is connected to the coil and contacts of the molded case circuit breaker through the I / 0 module (EL1008 / EL2008) to realize the opening and closing control of the molded case circuit breaker; the platform control PLC measures the output voltage / current of the power grid simulator through the power quality acquisition module (EL3402) to realize the measurement of the power quality of the power supply of the first pitch system component.

[0040] The variable pitch system test system can test the functional performance, FRT, grid adaptability, and high temperature aging of variable pitch systems of different models and power levels. The test methods are as follows:

[0041] 1) When testing the functional performance of pitch systems of different models and power levels, first close the first molded case circuit breaker Q0, then close the second molded case circuit breaker Q1, so that the first pitch system component is powered, and then close the third molded case circuit breaker Q2 to power the second pitch system component, and change the control mode of the driver in the second pitch system component from position mode to zero speed mode through the platform control PLC.

[0042] Change the DC bus voltage feedback threshold of the energy feedback unit to 650V.

[0043] The platform rotation speed is controlled by giving the position and speed limit of the first variable pitch system component, and the platform torque is controlled by giving the output current of the second variable pitch system driver.

[0044] 2) When testing the FRT and grid adaptability of variable pitch systems of different models and power levels, first, based on step 1), the platform controls the PLC to control the amplitude, frequency, imbalance and harmonics of the output voltage of the grid simulator to achieve the change of grid conditions of the first variable pitch system component.

[0045] 3) When conducting high-temperature aging tests on pitch systems of different models and power levels, place two sets of pitch system components and test components in an environmental test chamber, apply high temperature conditions through the environmental test chamber, place the platform control PLC outside the environmental test chamber, and implement product operation according to step 1).

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, 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 variable pitch system test system, characterized in that: It includes a power distribution component, a power grid simulator (AC), a first pitch system component, a test component, and a second pitch system component; One end of the power distribution component is connected to one end of the power grid simulator (AC), the other end of the power grid simulator (AC) is connected to one end of the first pitch system component, the other end of the first pitch system component is connected to one end of the test component, the other end of the test component is connected to one end of the second pitch system component, and the other end of the second pitch system component is connected to the other end of the power distribution component; The test assembly comprises a reducer 1 (A1), a reducer 2 (A2), and a reducer 3 (A3), wherein one end of a first low-speed shaft of the reducer 1 (A1) is connected to a high-speed shaft of the reducer 2 (A2), and a second low-speed shaft of the reducer 1 (A1) is connected to a high-speed shaft of the reducer 3 (A3); The reducer 1 (A1) is a double-input and double-output reducer, and the test assembly also includes a first variable pitch motor (M1), a first coupling (C1), a torque speed sensor (T), and a second coupling (C2), the other end of the first variable pitch motor (M1) is connected to one end of the first coupling (C1), the other end of the first coupling (C1) is connected to one end of the torque speed sensor (T), the other end of the torque speed sensor (T) is connected to one end of the second coupling (C2), and the other end of the second coupling (C2) is connected to one end of the first high-speed shaft of the reducer 1 (A1); The power distribution component comprises a first molded case circuit breaker (Q1), a second molded case circuit breaker (Q2), and a third molded case circuit breaker (Q3); one end of the first molded case circuit breaker (Q1) is connected to a power supply, the other end of the first molded case circuit breaker (Q1) is connected to one end of the second molded case circuit breaker (Q2), the other end of the second molded case circuit breaker (Q2) is connected to the other end of the power grid simulator (AC), one end of the third molded case circuit breaker (Q3) is connected to the circuit between the first molded case circuit breaker (Q1) and the second molded case circuit breaker (Q2), and the other end of the third molded case circuit breaker (Q3) is connected to the second pitch system component; The test assembly also includes a third coupling (C3) and a second pitch motor (M2), one end of the third coupling (C3) is connected to one end of the second high-speed shaft of the reducer (A1), the other end of the third coupling (C3) is connected to one end of the second pitch motor, and the other end of the second pitch motor (M2) is connected to the second pitch system assembly.

2. A pitch system test system according to claim 1, characterized in that: The test assembly also includes: disc one (D1) and disc two (D2), wherein disc one (D1) is installed at one end of the low-speed shaft of reducer two (A2), and disc two (D2) is installed at one end of the low-speed rotating shaft of reducer three (A3).

3. A pitch system test system according to claim 1, characterized in that: The first variable pitch system comprises a first rectifier (V1) and a first inverter (V2), one end of the first rectifier (V1) is connected to the other end of the power grid simulator (AC), the other end of the first rectifier (V1) is connected to one end of the first inverter (V2), and one end of the first inverter (V2) is connected to one end of the first variable pitch motor (M1).

4. A pitch system test system according to claim 1, characterized in that: The second variable pitch system component includes a second rectifier (V3), a second inverter (V4), a reactor (L), and an energy feedback unit (E). One end of the second rectifier (V3) is connected to the other end of the third molded case circuit breaker (Q3), the other end of the second rectifier (V3) is connected to one end of the second inverter (V4), the other end of the second inverter (V4) is connected to the other end of the second variable pitch motor (M2), one end of the reactor (L) is connected to the circuit between the third molded case circuit breaker (Q3) and the second rectifier (V3), the other end of the reactor (L) is connected to one end of the energy feedback unit (E), and the other end of the energy feedback unit (E) is connected to the circuit between the second rectifier (V3) and the second inverter (V4).

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