Safety chain voltage stabilizer of wind generating set

Abstract

The utility model belongs to the technical field of wind power generation, and relates to a safety chain voltage stabilizer of a wind generating set, which comprises a tower footing control cabinet, a cabin control cabinet, a first safety chain module and a second safety chain module, according to the utility model, the power supply of the safety chain module which is originally arranged in the control cabinet is independently led out of the control cabinet, and the independent power supply equipment is additionally arranged to supply power to the safety chain module, so that the problem that the safety chain module in the prior art is installed and electrified in the control cabinet is solved; the phenomenon that the voltage drop of the safety chain module is large due to the fact that the number of devices and modules in the control cabinet is large is avoided, and false triggering caused by the large voltage drop of the safety chain module is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation and relates to a safety chain voltage stabilizing device for a wind power generator set. Background Art

[0002] The unit safety system in the wind turbine control system is also called the safety chain. The safety chain is the highest level of protection to ensure the safety of the wind turbine. It is a software and hardware protection measure independent of the computer system. The safety chain adopts a reverse logic design to connect the fault nodes that may cause serious damage to the wind turbine in series into a loop. Once a node in the loop is activated, the entire loop will be powered off, the wind turbine will immediately shut down, the actuator will lose power, the unit will be instantly disconnected from the grid, and the main control system and the pitch system will be locked, thereby maximizing the safety of the unit. If the faulty node cannot be restored, the normal operation of the entire unit cannot be achieved. At the same time, the safety chain is also the last line of protection for the entire unit, which is after the software protection of the unit. The safety chain of the wind turbine is very important. Logically, the level of the safety chain system is higher than the control system. Its purpose is to ensure that the wind turbine equipment is still in a safe state when a fault occurs. If a relatively large fault occurs, the task of the safety chain system is to ensure the safe operation of the equipment, so that the 24V circuit of the safety chain is powered off and the wind turbine is shut down normally. The safety chain is generally divided into two parts: the primary safety chain and the secondary safety chain. The primary safety chain is mainly the safety protection device of the main control system, and the secondary safety chain is mainly the security device of the variable pitch system. The safety chain system is mainly composed of multiple nodes such as the reset button, grid-connected contactor, main circuit breaker, generator overspeed module, impeller overspeed module, vibration switch, variable pitch cabinet emergency stop button, main control cabinet (tower bottom cabinet) emergency stop switch, cabin emergency stop switch, etc. After the unit is powered on, under normal conditions, the entire safety chain is powered by 24V. If a component of the unit fails, the node corresponding to it is disconnected and the safety chain loses power. The 230V power supply circuit controlled by the safety relay loses power at the same time, the entire solenoid valve circuit and the AC contactor in the 230V circuit lose pressure, and the unit performs an emergency braking process.

[0003] However, since the control cabinet where the wind turbine generator set safety chain is located is connected to various devices and multiple modules at the same time, the voltage on the safety chain is often affected by the devices and modules in the cabinet, resulting in a large voltage drop. As a result, the emergency shutdown of the wind turbine generator set and the instantaneous disconnection of the unit from the grid due to false triggering often occur, causing unnecessary production safety accidents and economic losses. Therefore, a device that can prevent the wind turbine generator set safety chain from being falsely triggered due to voltage drop is needed to solve this technical problem. Utility Model Content

[0004] The technical solution adopted by the utility model to solve the technical problem is: a safety chain voltage stabilizing device for a wind turbine generator set, comprising: a tower base control cabinet, a cabin control cabinet, a first safety chain module, and a second safety chain module. The tower base control cabinet is used for tower bottom control of the wind turbine generator set, and the cabin control cabinet is used for tower control of the wind turbine generator set. The first safety chain module is a protective measure module for ensuring the safety of the tower bottom of the wind turbine generator set, and the second safety chain module is a protective measure module for ensuring the safety of the tower of the wind turbine generator set; the tower base control cabinet is provided with a first 230V circuit breaker, a first UPS power supply, a first 24V circuit breaker, and the tower base control cabinet is provided with a first 230V circuit breaker, a first UPS power supply, a first 24V circuit breaker, and a second 230V circuit breaker. The cabinet is electrically connected to the first 230V circuit breaker, the power supply of the 400V circuit breaker is connected to the first UPS power supply through the 400V to 24V module, the first UPS power supply is electrically connected to the first 24V circuit breaker, and the first 24V circuit breaker is electrically connected to the first safety chain module, the first DP connector, the first PLC bus coupler module, and the first terminal module respectively; due to the 400 to 24V power supply module connected to the lower end of the 400V switch, the 24V power supply is transferred to the UPS and the 24V switch through the 24V power distributor, that is, the PLC module is powered in two ways, after the main power 24V is lost, the UPS can also supply power for half an hour;

[0005] The cabin control cabinet is provided with a second 230V circuit breaker, a second UPS power supply, and a second 24V circuit breaker. The cabin control cabinet is electrically connected to the second 230V circuit breaker. The 400V circuit breaker is connected to the 400V to 24V power supply module. The 24V power supply is distributed to the UPS and the 24V circuit breaker through a distributor. The second UPS power supply is electrically connected to the second 24V circuit breaker. The second 24V circuit breaker is electrically connected to the second safety chain module, the second DP connector, the second PLC bus coupler module, and the second terminal module respectively. The second DP connector, the second PLC bus coupler module, and the second terminal module are connected to the cabin control cabinet through optical fiber and profibus optical fiber module data; the first safety chain module is communicatively connected to the second safety chain module; the first safety chain module and the second safety chain module are removed from the control cabinet respectively and powered separately, and the two safety chain modules are communicatively connected, thereby ensuring the safe communication of the two safety chain modules on and below the tower. At the same time, the separate power supply can ensure the voltage stability of the safety chain module, and the safety chain module will not be falsely triggered due to a large voltage drop on the safety chain module due to too many devices and modules in the control cabinet.

[0006] Preferably, a first upper wiring rack and a first lower wiring rack are provided outside the tower base control cabinet, a first 230V circuit breaker and a first UPS power supply are fixedly connected to the first upper wiring rack, and a first safety chain module, a first 24V circuit breaker, a first DP connector, a first PLC bus coupler module, and a first terminal module are respectively fixedly connected to the first lower wiring rack; a second upper wiring rack and a second lower wiring rack are provided outside the cabin control cabinet, a second 230V circuit breaker and a second UPS power supply are fixedly connected to the second upper wiring rack, and a second safety chain module, a second 24V circuit breaker, a second DP connector, a second PLC bus coupler module, and a second terminal module are respectively fixedly connected to the second lower wiring rack; the safety chain module and newly added equipment and modules are centrally installed on an independent wiring rack outside the control cabinet, which is convenient for wiring connection and later maintenance management.

[0007] More preferably, the distance between the first upper wiring rack and the first lower wiring rack is not less than 20CM, and the distance between the second upper wiring rack and the second lower wiring rack is not less than 20CM; the upper and lower rows of wiring racks are respectively installed with strong current equipment and modules and weak current equipment and modules, and the separation of strong and weak electricity is safer.

[0008] Preferably, the first safety chain module is connected to the second safety chain module via optical fiber communication, and the safety chain modules on and below the tower are connected via optical fiber communication, so that the connection between the safety chain modules on and below the tower is more stable and reliable.

[0009] Preferably, the first safety chain module and the second safety chain module are pluggable Beckhoff modules.

[0010] The beneficial effects of the utility model are:

[0011] The utility model leads the safety chain module originally arranged in the control cabinet to the inside or outside of the control cabinet, and adds an independent power supply device to power the safety chain module, thereby eliminating the phenomenon in the prior art that when the safety chain module is installed and powered by the control cabinet, the voltage drop of the safety chain module is large due to the large number of devices and modules in the control cabinet, thereby avoiding the occurrence of false triggering due to the large voltage drop of the safety chain module. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a circuit connection diagram of a safety chain voltage stabilizing device of a wind turbine generator set;

[0013] Figure 2 This is the safety chain connection diagram of the tower base control cabinet;

[0014] Figure 3 This is the safety chain connection diagram of the cabin control cabinet;

[0015] Figure 4 This is a schematic diagram of the unit communication topology.

[0016] In the figure: 1. tower base control cabinet; 2. cabin control cabinet; 3. first safety chain module; 4. second safety chain module; 5. optical fiber; 31. first 230V circuit breaker; 32. first UPS power supply; 33. first 24V circuit breaker; 34. first DP connector; 35. first PLC bus coupler module; 36. first terminal module; 37. first upper wiring rack; 38. first lower wiring rack; 41. second 230V circuit breaker; 42. second UPS power supply; 43. second 24V circuit breaker; 44. second DP connector; 45. second PLC bus coupler module; 46. second terminal module; 47. second upper wiring rack; 48. second lower wiring rack. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the relevant technologies in 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 of 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.

[0018] refer to Figures 1 to 4 A safety chain voltage stabilizing device for a wind turbine generator set comprises: a tower base control cabinet 1, a cabin control cabinet 2, a first safety chain module 3, and a second safety chain module 4. The tower base control cabinet 1 is used for tower bottom control of the wind turbine generator set, and the cabin control cabinet 2 is used for tower control of the wind turbine generator set. The first safety chain module 3 is a protective measure module for ensuring the safety of the wind turbine generator set at the bottom of the tower, and the second safety chain module 4 is a protective measure module for ensuring the safety of the wind turbine generator set on the tower;

[0019] The tower base control cabinet 1 is provided with a first 230V circuit breaker 31, a first UPS power supply 32, and a first 24V circuit breaker 33. The tower base control cabinet 1 is electrically connected to the first 230V circuit breaker 31, the first 230V circuit breaker 31 is electrically connected to the first UPS power supply 32, the first UPS power supply 32 is electrically connected to the first 24V circuit breaker 33, and the first 24V circuit breaker 33 is electrically connected to the first safety chain module 3, the first DP connector 34, the first PLC bus coupler module 35, and the first terminal module 36 respectively; due to the 400 to 24V power supply module connected to the lower end of the 400V switch, the 24V power supply transferred out is supplied to the UPS and the 24V switch through the 24V power distributor, that is, the PLC module is supplied with power in two ways. After the main power 24V is powered off, the UPS can also supply power for half an hour;

[0020] The cabin control cabinet 2 is provided with a second 230V circuit breaker 41, a second UPS power supply 42, and a second 24V circuit breaker 43. The cabin control cabinet 2 is electrically connected to the second 230V circuit breaker 41, the second 230V circuit breaker 41 is electrically connected to the second UPS power supply 42, the second UPS power supply 42 is electrically connected to the second 24V circuit breaker 43, and the second 24V circuit breaker 43 is electrically connected to the second safety chain module 4, the second DP connector 44, the second PLC bus coupler module 45, and the second terminal module 46. The second DP connector 44 and the second PLC bus coupler module 45. The second terminal module 46 is connected to the cabin control cabinet 2 through optical fiber and profibus optical fiber module data; the first safety chain module 3 is connected to the second safety chain module 4 in communication; the first safety chain module 3 and the second safety chain module 4 are removed from the control cabinet respectively and powered separately, and the two safety chain modules are connected in communication, thereby ensuring the safe communication between the two safety chain modules above and below the tower. At the same time, the separate power supply can ensure the voltage stability of the safety chain module, and the safety chain module will not be falsely triggered due to a large voltage drop on the safety chain module due to too many devices and modules in the control cabinet.

[0021] Furthermore, the tower base control cabinet 1 is provided with a first upper wiring rack 37 and a first lower wiring rack 38, the first 230V circuit breaker 31 and the first UPS power supply 32 are fixedly connected to the first upper wiring rack 37, and the first safety chain module 3, the first 24V circuit breaker 33, the first DP connector 34, the first PLC bus coupler module 35, and the first terminal module 36 are respectively fixedly connected to the first lower wiring rack 38; the cabin control cabinet 2 is provided with a second upper wiring rack 47 and a second lower wiring rack 48, the second 230V circuit breaker 41 and the second UPS power supply 42 are fixedly connected to the second upper wiring rack 47, and the second safety chain module 4, the second 24V circuit breaker 43, the second DP connector 44, the second PLC bus coupler module 45, and the second terminal module 46 are respectively fixedly connected to the second lower wiring rack 48; the safety chain module and the newly added equipment and modules are centrally installed on an independent wiring rack outside the control cabinet, which is convenient for wiring connection and later maintenance management.

[0022] Furthermore, the distance between the first upper wiring rack 37 and the first lower wiring rack 38 is not less than 20CM, and the distance between the second upper wiring rack 47 and the second lower wiring rack 48 is not less than 20CM; the upper and lower rows of wiring racks are respectively installed with strong current equipment and modules and weak current equipment and modules, and the separation of strong and weak electricity is safer.

[0023] Furthermore, the first safety chain module 3 is connected to the second safety chain module 4 via the optical fiber 5, and the safety chain modules on and below the tower are connected via the optical fiber 5, so that the connection between the safety chain modules on and below the tower is more stable and reliable.

[0024] Furthermore, the first safety chain module 3 and the second safety chain module 4 are pluggable Beckhoff modules.

[0025] Example

[0026] This embodiment converts the wind turbine safety chain system into an independent power supply system, thereby preventing other systems in the control cabinet from affecting the power supply of the safety chain system, causing the safety chain to fail to operate normally or be triggered by mistake.

[0027] This embodiment is a sea-mounted system unit. The PLC modules in the tower base control cabinet 1 and the cabin control cabinet 2 are standard pluggable Beckhoff modules. There are power contact pieces on both sides of each module. After plugging, they are connected to the power contact pieces of the previous and next modules to complete the 24V power supply. In addition, there is a K-bus loop on the module for communication between sites. In order to realize independent power supply of the unit safety chain module, the safety chain module needs to be removed and equipped with an independent UPS power system. The safety chain module is independent of the communication between the sub-site and the PLC.

[0028] First, make corrections to the tower base control cabinet 1. Before maintenance and corrections, first shut down the tower base control cabinet 1, disconnect the tower base 24VDC power supply, the UPS power supply, and then disconnect the tower base 400V power supply. Make sure to make corrections after power is off.

[0029] Remove the wiring at each point of the first safety chain module 3 in the tower base control cabinet 1, and remove the first safety chain module 3 from the guide rail in the cabinet.

[0030] Add two beams and two guide rails, and install the newly added beams on the upper end of the tower base control cabinet 1 cabinet panel. The vertical distance between the two beams is 20cm. After the beams are installed, install the guide rails on the beams.

[0031] A first 230V circuit breaker 31, a first 24V circuit breaker, and a first UPS power supply 32 are newly installed. The first 230V circuit breaker 31 and the first UPS power supply 32 are installed on the newly added upper rail of the control cabinet.

[0032] Add the first DP connector 34, the first PLC bus coupler module 35, and the first terminal module 36; install the previously removed first safety chain module 3 together with the newly added first 24V circuit breaker 33, the first DP connector 34, the first PLC bus coupler module 35, and the first terminal module 36 on the newly added lower rail. Set the substation communication address of the first safety chain module 3 to "12".

[0033] Secondly, make rectifications to the engine room control cabinet 2. Before maintenance and rectification, first shut down the engine room control cabinet 2, disconnect the 24VDC power supply to the engine room, the UPS power supply, and then disconnect the 400V power supply to the engine room. Make sure that rectifications can be made only after power is cut off.

[0034] Remove the wiring at each point of the second safety chain module 4 in the cabin control cabinet 2, and remove the second safety chain module 4 from the guide rail. Add two crossbeams and two guide rails, and install the newly added crossbeams on the upper end of the cabinet panel of the cabin control cabinet 2. The vertical distance between the two crossbeams is 20cm. After the crossbeams are installed, install the guide rails on the crossbeams.

[0035] A second 230V circuit breaker 41, a second 24V circuit breaker 43, and a second UPS power supply 42 are newly installed. The second 230V circuit breaker 41 and the second UPS power supply 42 are installed on the newly added upper rail of the control cabinet.

[0036] Add the second DP connector 44, the second PLC bus coupler module 45, and the second terminal module 46; install the previously removed second safety chain module 4 on the newly added lower rail together with the newly added second 24V circuit breaker 43, the second DP connector 44, the second PLC bus coupler module 45, and the second terminal module 46. Set the substation communication address of the second safety chain module 4 to "23".

[0037] Remove the profibus-DP communication bus that connects the tower base "11" station and the tower base optical fiber transceiver, the cabin "22" station and "20" station. Use a new profibus-DP communication bus to connect the tower base "10" station and the tower base "11" station and the tower base optical fiber transceiver, and the cabin "20, 22, 24, 6, 7, 8" stations respectively.

[0038] When the unit hardware modification is completed, the unit program and SCADA will be updated synchronously.

[0039] By equipping the safety chain modules in the tower control cabinet 1 and the cabin control cabinet 2 with independent power supplies, rectifying the communication between the safety chain and the main control PLC, and updating the main control program and SCADA of the unit, the demand for independent power supply of the safety chain system will be met. The phenomenon of large voltage drop of the safety chain module caused by a large number of devices and modules in the control cabinet is eliminated, and the occurrence of false triggering caused by large voltage drop of the safety chain module is avoided.

[0040] To sum up, the utility model leads the power supply of the safety chain module originally arranged in the control cabinet out of the control cabinet, and adds an independent power supply device to power the safety chain module. This eliminates the phenomenon in the prior art that when the safety chain module is installed and powered by the control cabinet, the voltage drop of the safety chain module is large due to the large number of devices and modules in the control cabinet, and avoids the occurrence of false triggering due to the large voltage drop of the safety chain module. Therefore, the utility model has broad application prospects.

[0041] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A safety chain voltage stabilizing device for a wind turbine generator set, characterized in that: include: A tower base control cabinet (1), a cabin control cabinet (2), a first safety chain module (3), and a second safety chain module (4), wherein the tower base control cabinet (1) is used for tower bottom control of a wind turbine generator set, the cabin control cabinet (2) is used for tower top control of a wind turbine generator set, the first safety chain module (3) is a protective measure module for ensuring the safety of the wind turbine generator set at the bottom of the tower, and the second safety chain module (4) is a protective measure module for ensuring the safety of the wind turbine generator set at the top of the tower; The tower base control cabinet (1) is provided with a first 230V circuit breaker (31), a first UPS power supply (32), and a first 24V circuit breaker (33); the tower base control cabinet (1) is electrically connected to the first 230V circuit breaker (31); the first 230V circuit breaker (31) is electrically connected to the first UPS power supply (32); the first UPS power supply (32) is electrically connected to the first 24V circuit breaker (33); the first 24V circuit breaker (33) is electrically connected to a first safety chain module (3), a first DP connector (34), a first PLC bus coupler module (35), and a first terminal module (36); The cabin control cabinet (2) is provided with a second 230V circuit breaker (41), a second UPS power supply (42), and a second 24V circuit breaker (43); the cabin control cabinet (2) is electrically connected to the second 230V circuit breaker (41); the second 230V circuit breaker (41) is electrically connected to the second UPS power supply (42); the second UPS power supply (42) is electrically connected to the second 24V circuit breaker (43); the second 24V circuit breaker (43) is electrically connected to a second safety chain module (4), a second DP connector (44), a second PLC bus coupler module (45), and a second terminal module (46); the second DP connector (44), the second PLC bus coupler module (45), and the second terminal module (46) are connected to the cabin control cabinet (2) via optical fibers and a profibus optical fiber module data; The first safety chain module (3) is communicatively connected to the second safety chain module (4).

2. A safety chain voltage stabilizing device for a wind turbine generator set according to claim 1, characterized in that: The tower base control cabinet (1) is provided with a first upper wiring rack (37) and a first lower wiring rack (38), the first 230V circuit breaker (31) and the first UPS power supply (32) are fixedly connected to the first upper wiring rack (37), and the first safety chain module (3), the first 24V circuit breaker (33), the first DP connector (34), the first PLC bus coupler module (35), and the first terminal module (36) are respectively fixedly connected to the first lower wiring rack (38); the cabin control cabinet (2) is provided with a second upper wiring rack (47) and a second lower wiring rack (48), the second 230V circuit breaker (41) and the second UPS power supply (42) are fixedly connected to the second upper wiring rack (47), and the second safety chain module (4), the second 24V circuit breaker (43), the second DP connector (44), the second PLC bus coupler module (45), and the second terminal module (46) are respectively fixedly connected to the second lower wiring rack (48).

3. A safety chain voltage stabilizing device for a wind turbine generator set according to claim 2, characterized in that: The distance between the first upper wiring rack (37) and the first lower wiring rack (38) is not less than 20CM, and the distance between the second upper wiring rack (47) and the second lower wiring rack (48) is not less than 20CM.

4. A safety chain voltage stabilizing device for a wind turbine generator set according to claim 1, characterized in that: The first safety chain module (3) is communicatively connected to the second safety chain module (4) via an optical fiber (5); the first safety chain module (3) and the second safety chain module (4) are pluggable Beckhoff modules.

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