Main control equipment for testing variable pitch system
By designing a master control device that integrates PLC control circuit and multiple communication card parts, the problem of not being able to combine multiple communication and security chains in the prior art is solved, and automatic switching and more efficient testing process is realized.
Patent Information
- Application Number
- CN202323564411.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2033-12-26
AI Technical Summary
The existing pitch system main control device cannot have multiple communication methods and multiple security chain systems at the same time, resulting in the need to replace the communication card and artificial line changes in each test.
A main control device for pitch system testing is designed, using PLC control circuit, DI card, DO card, CAN communication card and DP communication card. Different communication methods can be switched through CAN communication card and DP communication card, and different security chain systems can be switched through DO card and contactor.
Automatic switching of different communication methods and security chain systems is realized, avoiding the tedious process of frequently changing communication cards and changing lines, and improving testing efficiency and flexibility.
Smart Images
Figure CN223038058U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of variable pitch control systems for wind turbine generator sets, and in particular relates to a main control device used for testing a variable pitch system. Background Art
[0002] As the main component of the wind turbine generator set, it is necessary to conduct comprehensive factory testing on the pitch system, including communication testing, safety chain testing, and control and monitoring of the operation of the pitch system.
[0003] The main control device of the current variable pitch system has a relatively simple communication function. Each time a variable pitch system with different communications is tested, the communication card needs to be replaced and the main control program needs to be updated. The safety chain system of each manufacturer is different. When the current main control is connected to different safety chain systems, manual wiring is required. Utility Model Content
[0004] In order to solve the deficiencies in the prior art, the utility model provides a main control device for testing a variable pitch system, which solves the problem that the existing main control cannot have multiple communications and multiple safety chains at the same time.
[0005] The present invention adopts the following technical solution.
[0006] A main control device for testing a variable pitch system, including a device box, a power inlet, a power outlet, a communication and safety chain outlet,
[0007] The upper part of the device box is equipped with an indicator light, the upper right corner is the power outlet and the communication and safety chain outlet, the middle part of the device box is equipped with a control circuit and a contactor, and the lower left corner of the lower part of the device box is the power inlet, the switch power supply, the air switch, and the terminal block are installed;
[0008] The control circuit includes a PLC, a DI card, a DO card, a CAN communication card, and a DP communication card, wherein the positive pole of the PLC is connected to the switch power supply, one end of the DO card is connected to the contactor, and the other end is connected to the communication and safety chain outlet, and the CAN communication card and the DP communication card are both connected to the communication and safety chain outlet;
[0009] The power inlet is connected to the power outlet, and the 24V switching power supply is connected to the power inlet and the air switch.
[0010] The terminal block has 400V power supply four-hole terminal block a, four-hole terminal block b, four-hole terminal block c, two 24V positive four-position terminal blocks, four-position terminal block a and four-position terminal block b, which are short-circuited, two 24V negative four-position terminal blocks, four-position terminal block c and four-position terminal block d, which are short-circuited, a neutral terminal, and a ground terminal.
[0011] The air switch includes a 24V power switch, an EFC switch, a 400V power switch, and a 220V power switch. The 24V power switch is connected to the PLC, a four-terminal block a, and a 24V switching power supply. The 400V power switch is connected to the contactor and is also connected to the power inlet through four-hole terminal blocks a, b, and c. The 220V power switch is connected to the switching power supply and four-hole terminal block c.
[0012] The indicator lights include a safety chain indicator light, an L1 indicator light, an L2 indicator light, and an L3 indicator light.
[0013] The contactors include L1 contactor, L2 contactor, L3 contactor, which are connected to the 400V power switch, the power outlet, the DO card, and the four-terminal block d. The L1 contactor, L2 contactor, and L3 contactor are respectively connected to the L1 indicator light, L2 indicator light, and L3 indicator light. The safety chain indicator light is connected to the relay and the four-terminal block d.
[0014] The DI card connects the relay and the four-terminal block b; the DO card outputs commands to control the L1 contactor, L2 contactor, and L3 contactor, and can also output EFC signals; the CAN communication card and the DP communication card are responsible for communication, and when there is different communication on the pitch side, different communication methods can be used for connection.
[0015] The 24V power switch is connected to the PLC and is responsible for supplying power to the PLC; the EFC switch is connected to the DO card, communication, and the safety chain outlet and is responsible for cutting off the pitch EFC signal; the 400V power switch is connected to the power outlet through the contactors (20, 21, 22) and is responsible for supplying power to the pitch; the 220V power switch is connected to the 24V switching power supply and is responsible for supplying power to the 24V switching power supply.
[0016] The safety chain indicator light is connected to the normally closed contact of the relay; the L1 indicator light is connected to the contactor; the L2 indicator light is connected to the contactor; the L3 indicator light is connected to the contactor.
[0017] The relay is connected to the cables of the communication and the safety chain outlet to control the on and off of the safety chain indicator light. When the relay is powered on, 24V can be normally fed back to the DI card.
[0018] The power inlet accesses a 400V three-phase power supply to three four-hole terminal blocks, which are connected to the 400V power switch through the four-hole terminal blocks, then connected to the L1 contactor, L2 contactor, and L3 contactor, and finally connected to the cables of the power outlet.
[0019] Compared with the prior art, the utility model can meet the testing of pitch systems with different communications and the testing of safety chain systems of different manufacturers, avoiding the problems of frequently replacing communication cards and changing the safety chain interface of the pitch system that occurred before when corresponding to different pitch systems. Description of the Drawings
[0020] Figure 1 Schematic diagram of a main control device for pitch system testing according to the present utility model;
[0021] Figure 2 Control circuit diagram of a main control device for pitch system testing according to the present utility model;
[0022] Reference numerals in the drawings are as follows:
[0023] 1. Device box; 2. Power inlet; 3. Power outlet; 4. Communication and safety chain outlet; 5. PLC module; 6. DI card; 7. DO card; 8. CAN communication card; 9. DP communication card; 10. 24V switching power supply; 11. 24V power switch; 12. EFC switch; 13. 400V power switch; 14. 220V power switch; 15. Terminal block; 15.1 Four-hole terminal block a; 15.2 Four-hole terminal block b; 15.3 Four-hole terminal block c; 15.4 Four-position terminal block a; 15.5 Four-position terminal block b; 15.6 Four-position terminal block c; 15.7 Four-position terminal block d; 15.8 Neutral wire terminal; 15.9 Ground wire terminal; 16. Safety chain indicator light; 17. L1 indicator light; 18. L2 indicator light; 19. L3 indicator light; 20. L1 contactor; 21. L2 contactor; 22. L3 contactor; 23. Relay. Detailed implementation manners
[0024] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described in this application are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the spirit of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0025] As Figure 1 shown, a main control device for pitch system testing includes a device box 1, a power inlet 2, a power outlet 3, and a communication and safety chain outlet 4. The device box is the device housing, with indicator lights installed in the upper part; the control circuit part, contactors, and relay 23 are installed in the middle part; the switching power supply 10, air switches, and terminal block 15 are installed in the lower part.
[0026] Specifically, the device box 1 is the housing of the detection device. The lower left corner of the device box 1 is the power inlet 2. After the three-phase power enters the box, the upper right corner is the power outlet 3 and the communication and safety chain outlet 4. The middle part of the device box 1 is equipped with a control circuit and contactors. The power outlet 3 sends the three-phase power into the pitch control cabinet. The communication and safety chain outlet 4 connects the communication line and safety chain line between the device box 1 and the pitch system.
[0027] The power inlet 2 is connected to the power outlet 3. The 24V switching power supply is connected to the power inlet and the air switch. The three-phase power input at the power inlet 2 passes through the terminal block 15, the 400V switch, and three contactors to reach the power outlet 3 and finally connects to the pitch system. Disconnecting the 400V switch can cut off the three-phase power of the pitch system. The PLC can control the suction of the contactors to achieve the purpose of controlling the three-phase power. After the power line enters the device box 1, it is connected to the terminal block 15. The upper port of the 400V power switch 13 is connected to the terminal block 15. The three wires at the lower port of the 400V power switch 13 are connected to the upper ports of the three contactors. The lower ports of the contactors are connected to the indicator lights and are connected in parallel with the cable of the power outlet 3, and finally connected to the pitch control cabinet. Single-phase power is taken from the terminal block 15 and connected to the upper port of the 220V power switch 14. The lower port of the 220V power switch 14 is connected to the input of the 24V switching power supply 10. The positive and negative outputs of the 24V switching power supply 10 are respectively connected to the terminal block 15. After passing through the terminal block 15, it is connected to the upper port of the 24V power switch 11. The lower port of the 24V power switch 11 is connected to the PLC module 5 to provide power for the control circuit.
[0028] There are a 400V power four-hole terminal block a15.1, a four-hole terminal block b15.2, and a four-hole terminal block c15.3 on the terminal block 15. There are 2 four-bit terminal blocks for the 24V positive pole, namely the four-bit terminal block a15.4 and the four-bit terminal block b15.5, which are short-circuited. There are 2 four-bit terminal blocks for the 24V negative pole, namely the four-bit terminal block c15.6 and the four-bit terminal block d15.7, which are short-circuited. There is a zero-line terminal 15.8 and a ground-line terminal 15.9.
[0029] The air switch includes a 24V power switch 11, an EFC switch 12, a 400V power switch 13, and a 220V power switch 14. Among them, the 24V power switch 11 is connected to the PLC 5, the four-bit terminal block a15.4, and the 24V switching power supply 10. The 400V power switch 13 is connected to the contactors and is also connected to the power inlet 2 through the four-hole terminal block a15.1, the four-hole terminal block b15.2, and the four-hole terminal block c15.3. The 220V power switch 14 is connected to the switching power supply 10 and the four-hole terminal block c15.3.
[0030] The indicator lights include a safety chain indicator light 16, an L1 indicator light 17, an L2 indicator light 18, and an L3 indicator light 19.
[0031] The contactor includes an L1 contactor 20, an L2 contactor 21, an L3 contactor 22, which are connected to a 400V power switch 13, a power outlet 3, a DO card 7, and a four-terminal block d15.7. The L1 contactor 20, the L2 contactor 21, and the L3 contactor 22 are respectively connected to an L1 indicator light 17, an L2 indicator light 18, and an L3 indicator light 19. The safety chain indicator light 16 is connected to a relay 23 and the four-terminal block d15.7.
[0032] The DI card 6 connects the relay 23 and the four-terminal block b15.5; the DO card 7 outputs commands to control the L1 contactor 20, the L2 contactor 21, and the L3 contactor 22, and can also output an EFC signal; the CAN communication card 8 and the DP communication card 9 are responsible for communication. When there are different communications on the pitch side, different communication methods can be used for connection.
[0033] The 24V power switch 11 is connected to the PLC 5 and is responsible for supplying power to the PLC 5; the EFC switch 12 is connected to the DO card 7, the communication and safety chain outlet 4, and is responsible for cutting off the pitch EFC signal; the 400V power switch 13 is connected to the power outlet 3 through the contactors 20, 21, 22, and is responsible for supplying power to the pitch; the 220V power switch 14 is connected to the 24V switching power supply 10 and is responsible for supplying power to the 24V switching power supply 10.
[0034] The safety chain indicator light 16 is connected to the normally closed contact of the relay 23; the L1 indicator light 17 is connected to the contactor 20; the L2 indicator light 18 is connected to the contactor 21; the L3 indicator light 19 is connected to the contactor 22.
[0035] The relay 23 is connected to the cable of the communication and safety chain outlet 4 to control the on and off of the safety chain indicator light 16. When the relay is powered on, 24V can be normally fed back to the DI card 6.
[0036] The power inlet 2 connects a 400V three-phase power supply to three four-hole terminal blocks, which are then connected to the 400V power switch 13, then to the L1 contactor 20, the L2 contactor 21, the L3 contactor 22, and finally connected to the cable of the power outlet 4. As Figure 2 shown, the control circuit includes a PLC 5, a DI card 6, a DO card 7, a CAN communication card 8, and a DP communication card 9. Among them, the positive pole of the PLC 5 is connected to the switching power supply 10, one end of the DO card 7 is connected to the contactor, and the other end is connected to the communication and safety chain outlet 4. Both the CAN communication card 8 and the DP communication card 9 are connected to the communication and safety chain outlet 4;
[0037] The control circuit includes a PLC module 5, preferably a Beckhoff CX9000; a DO card 7, a DI card 6, a CAN communication card 8, and a DP communication card 9. Among them, the DO card 7 is preferably a Beckhoff EL2408, the DI card 6 is preferably a Beckhoff EL1408, the CAN communication card 8 is preferably a Beckhoff EL6751, and the DP communication card 9 is preferably a Beckhoff EL6731.
[0038] The DO card 7 is used to provide an EFC signal for the pitch system and control the suction of each contactor; the DI card 6 is used to detect the safety chain return signal to determine whether the pitch is in a fault-free state. The EFC signal and the safety chain return signal are connected to the pitch system through the wire harness at the communication and safety chain outlet 4. The CAN communication card 8 and the DP communication card 9 can be directly connected and used respectively when the pitch system is applied to a certain type of communication.
[0039] Both the CAN communication card 8 and the DP communication card 9 have their own communication lines. One end is connected to the card, and the other end is made into a quick plug structure. The communication line corresponding to the communication and safety chain outlet 4 is also a quick plug structure, which facilitates the quick switching between the two types of communication. The communication cable passing through the communication and safety chain outlet 4 enters the pitch system.
[0040] The main control EFC signal output by the DO card 7 is connected to the upper port of the EFC air switch 12, and the lower port is connected to the communication and safety chain outlet 4. The returned signal is connected to the four-terminal block c15.6. The 24V positive pole is taken from the four-terminal block b15.5 and connected to the communication and safety chain outlet 4. The returned signal is connected to the coil A1 of the relay 23. The coil A2 of the relay 23 is connected to the four-terminal block d15.7. The contact 11 of the relay 23 is connected to the four-terminal block a15.4, and the contact 12 of the relay 23 is connected to the safety chain indicator light. The contact 21 of the relay 23 is connected to the four-terminal block b15.5, and the contact 24 of the relay 23 is connected to the DI card 6.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.
Claims
1. A master control device for pitch system testing, comprising a device box (1), a power inlet (2), a power outlet (3), a communication and safety chain outlet (4), characterized in that: An indicator light is installed on the upper part of the device box (1), the power outlet (3) and the communication and safety chain outlet (4) are located in the upper right corner. A control circuit and a contactor are installed in the middle part of the device box (1). In the lower left corner of the lower part of the device box (1) are the power inlet (2), a switching power supply (10), an air switch, and a terminal block (15); The control circuit includes a PLC (5), a DI card (6), a DO card (7), a CAN communication card (8), and a DP communication card (9). Among them, the positive pole of the PLC (5) is connected to the switching power supply (10). One end of the DO card (7) is connected to the contactor, and the other end is connected to the communication and safety chain outlet (4). Both the CAN communication card (8) and the DP communication card (9) are connected to the communication and safety chain outlet (4); The power inlet (2) is connected to the power outlet (3), and the 24V switching power supply is connected to the power inlet and the air switch.
2. The master control device for pitch system testing according to claim 1, characterized in that: On the terminal block (15), there are four-hole terminal blocks a (15.1), b (15.2), c (15.3) for 400V power supply, two four-bit terminal blocks for 24V positive pole, namely four-bit terminal block a (15.4) and four-bit terminal block b (15.5) which are short-circuited, two four-bit terminal blocks for 24V negative pole, namely four-bit terminal block c (15.6) and four-bit terminal block d (15.7) which are short-circuited, a neutral wire terminal (15.8), and a ground wire terminal (15.9).
3. The master control device for pitch system testing according to claim 1, characterized in that: The air switch includes a 24V power switch (11), an EFC switch (12), a 400V power switch (13), and a 220V power switch (14). Among them, the 24V power switch (11) is connected to the PLC (5), four-bit terminal block a (15.4), and the 24V switching power supply (10). The 400V power switch (13) is connected to the contactor and is also connected to the power inlet (2) through four-hole terminal blocks a (15.1), b (15.2), c (15.3). The 220V power switch (14) is connected to the switching power supply (10) and four-hole terminal block c (15.3).
4. The master control device for pitch system testing according to claim 1, characterized in that: The indicator lights include a safety chain indicator light (16), an L1 indicator light (17), an L2 indicator light (18), and an L3 indicator light (19).
5. The master control device for pitch system testing according to claim 1, characterized in that: The contactor includes an L1 contactor (20), an L2 contactor (21), an L3 contactor (22), which are connected to a 400V power switch (13), a power outlet (3), a DO card (7), and a four-terminal block d (15.7). The L1 contactor (20), L2 contactor (21), and L3 contactor (22) are respectively connected to an L1 indicator light (17), an L2 indicator light (18), and an L3 indicator light (19). The safety chain indicator light (16) is connected to a relay (23) and a four-terminal block d (15.7).
6. The main control device for pitch system testing according to claim 1, characterized in that: The DI card (6) is connected to the relay (23) and the four-terminal block b (15.5); the DO card (7) outputs commands to control the L1 contactor (20), L2 contactor (21), and L3 contactor (22), and can also output an EFC signal; the CAN communication card (8) and the DP communication card (9) are responsible for communication, and when there are different communications on the pitch side, different communication methods can be used for connection.
7. The main control device for pitch system testing according to claim 1, characterized in that: The 24V power switch (11) is connected to the PLC (5) and is responsible for supplying power to the PLC (5); the EFC switch (12) is connected to the DO card (7) and the communication and safety chain outlet (4) and is responsible for cutting off the pitch EFC signal; the 400V power switch (13) is connected to the power outlet (3) through the contactors (20, 21, 22) and is responsible for supplying power to the pitch; the 220V power switch (14) is connected to the 24V switching power supply (10) and is responsible for supplying power to the 24V switching power supply (10).
8. The main control device for pitch system testing according to claim 4, characterized in that: The safety chain indicator light (16) is connected to the normally closed contact of the relay (23); the L1 indicator light (17) is connected to the contactor (20); the L2 indicator light (18) is connected to the contactor (21); the L3 indicator light (19) is connected to the contactor (22).
9. The main control device for pitch system testing according to claim 8, characterized in that: The relay (23) is connected to the cable of the communication and safety chain outlet (4) to control the on and off of the safety chain indicator light (16). When the relay is energized, 24V can be normally fed back to the DI card (6).
10. The main control device for pitch system testing according to claim 1, characterized in that: The power inlet (2) accesses a 400V three-phase power supply to three four-hole terminal blocks, which are connected to the 400V power switch (13), then connected to the L1 contactor (20), L2 contactor (21), L3 contactor (22), and finally connected to the cable of the power outlet (3).