CN204480043U - The proving installation of pitch-variable system - Google Patents

Abstract

Embodiment of the present utility model provides a kind of proving installation of pitch-variable system, and described proving installation comprises: test commutation circuit, generates handoff trigger signal; PLC, is connected with described test commutation circuit, switches the test operation performed for different aerogenerator set type according to described handoff trigger signal.The proving installation of pitch-variable system of the present utility model can reach the switching of multiple machine set type pitch-controlled system test operation, and small in volume, be convenient to onsite application.

Description

Test setup for pitch control system

technical field

The utility model relates to the technical field of wind power, in particular to a test device for a pitch variable system.

Background technique

The pitch control system of the wind turbine is one of the important components of the wind turbine. It mainly controls the blades to rotate to the pitch angle given by the main control system according to the change of the wind, and requires the pitch angle to be between the working position and the feathered position. The time can be continuously adjusted, and its operation management and safety control must be automated. Especially in order to adapt to changes in wind speed, the pitch control system must have the characteristics of fast response, reliable and stable operation.

A portable pitch test main control device used in the prior art includes a pitch main control box, a main power supply air switch, a main control PLC, a control air switch, a switching power supply module and a control cable. The main power supply air switch, main control PLC, control air switch, and switching power supply module are integrated in the main pitch control box. The main control PLC is connected to the monitoring host computer through a communication line, and the output terminal of the main control PLC is connected through a control air switch and a control cable. Main control interface to the pitch system. This device can replace the main control to control and test the pitch system when the start-up conditions of the main control system of the wind turbine are not met. However, the disadvantage of this setup is that only one pitch system product can be tested.

Utility model content

The purpose of the embodiment of the utility model is to provide a pitch control system test device, which can switch the test operation of the pitch control system of multiple unit types, and is small in size and light in weight, which is convenient for on-site use.

In order to achieve the purpose of the above-mentioned utility model, an embodiment of the utility model provides a test device for a pitch control system, including: a test switch circuit to generate a switch trigger signal; PLC, connected to the test switch circuit, according to the switch Trigger signal switching to perform test operations for different wind turbine types.

Preferably, the test switch circuit includes a first switch and a second switch:

the first switch, which sends a first switch signal;

the second switching switch, which sends a second switching signal;

The PLC is also used to receive the second switching signal after receiving the first switching signal, and count the number of times the second switching signal is received, and switch and execute the corresponding pitch control system according to the counting result test operation.

Preferably, the testing device is connected to pitch control systems of different types of wind power generating sets through a switching function block.

Preferably, the test device further includes: a power distribution circuit, externally connected to a three-phase AC power supply input through a power cable, for supplying power to the pitch control system.

Preferably, the test device further includes: a wireless module, connected to the PLC, for sending the pitch status data uploaded by the pitch control system received by the PLC to the mobile terminal.

Preferably, the test device further includes: a remote emergency stop switch, connected to the PLC, for receiving a stop signal sent by the remote control device and forwarding it to the PLC.

Preferably, the power distribution circuit includes:

A fault protection device, used for fault protection of the power distribution circuit;

The contactor is electrically connected to the fault protection device, the PLC and the pitch control system respectively, and is used to power on and off the pitch control system connected to it under the control of the PLC.

Preferably, the contactor includes an auxiliary contact, the auxiliary contact is connected to the PLC, and the PLC judges the on-off state of the contactor by detecting the on-off state of the auxiliary contact.

Preferably, the fault protection device is specifically a circuit breaker or an air switch.

Preferably, the PLC communicates with the pitch control system through a Profibus communication cable.

The test device of the variable pitch system provided by the embodiment of the utility model, by connecting a test switching circuit that can generate a switching trigger signal to the PLC, triggers the PLC to switch and execute the test operation corresponding to the variable pitch system of different types of wind power generating units, That is, one test device can test the pitch control system of multiple series of wind turbines, thereby reducing the number of test devices and reducing the test cost, and it is small in size and light in weight, which is convenient for on-site use. Communication enables testers to view the pitch status information in real time. At the same time, through remote control of the emergency stop switch, testers can press emergency stop at any position to ensure the safety of the test process. Since the test device is connected to the pitch control systems of different types of wind power generating sets through the transfer function block, it is avoided to reserve multiple interfaces in the test device, thereby reducing the cost of manufacturing the test device.

Description of drawings

Fig. 1 is a schematic structural diagram of a test device for a pitch control system according to Embodiment 1 of the present utility model;

Fig. 2 is a schematic structural diagram of a test device for a pitch control system according to Embodiment 2 of the present utility model.

Detailed ways

The test device of the pitch control system of the embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

Embodiment one

Fig. 1 is the structure schematic diagram of the test device of the variable pitch system of the utility model embodiment one, as shown in Fig. 1, it comprises: test switch circuit 102, generate switch trigger signal; PLC101, connect with test switch circuit 102, according to Toggle trigger signal Toggle performs test operations for different wind turbine types. Specifically, the test switching circuit 102 generates a switching trigger signal, and after receiving the switching trigger signal, the PLC 101 switches and executes test operations for different types of wind power generating sets according to the switching trigger signal. The test device can be applied to the pitch control system of the wind power generating set.

In practical applications, PLC 101 may store test programs corresponding to pitch control systems of different types of wind turbines, such as 1.5MW test program, 2.0MW test program, 2.5MW test program, 3MW test program and so on. The test switching circuit 102 generates a switching trigger signal and sends it to the PLC 101 , thereby controlling the PLC 101 to switch and execute a plurality of stored test programs.

The test device for the pitch control system of the embodiment of the utility model, through the test switching circuit that can generate a switch trigger signal, triggers the PLC to switch and execute the test operation corresponding to the pitch control system of different types of wind power generating sets, that is, a test device It can test the pitch control system of multi-series wind turbines, thereby reducing the number of test devices, reducing the test cost, and it is small in size and light in weight, which is convenient for on-site use.

Further, the test device can be connected to pitch control systems of different types of wind power generating sets through the transfer function block. It should be noted that one end of the transfer function block has an interface to match the test device of this embodiment, and the other end has multiple interfaces, and these multiple interfaces correspond to different pitch systems of different types of wind turbines, such as 1.5MW , 2.0MW, 2.5MW, etc. In this way, multiple interfaces can be avoided in the test device, and the cost of manufacturing the test device can be reduced.

Embodiment two

Fig. 2 is a schematic structural diagram of a test device for a pitch control system according to Embodiment 2 of the present utility model. As shown in Figure 2, this test device comprises: PLC101, first switch 202, second switch 203, circuit breaker 204, contactor 205, wireless module 206, remote control emergency stop switch 207, switching power supply 208 and indicator light 209 ,in:

The first switching switch 202 is connected to the PLC101 for generating and sending a first switching signal; the second switching switch 203 is also connected to the PLC201 for generating and sending a second switching signal.

After receiving the first switching signal, if the PLC 101 receives the second switching signal again, counts the times of receiving the second switching signal, and switches to execute the corresponding pitch control system test operation according to the counting result.

In practical applications, for example, after the first switch sends the first switch signal, the second switch sends the second switch signal once, and the PLC switches to execute the 1.5MW test program; the second switch sends the second switch signal twice, and the PLC switches Execute the 2.0MW test program, the second switching switch sends the second switching signal three times, and the PLC switches to execute the 2.5MW test program. The PLC switches the test operation of the pitch control system of different types of wind turbines by calling the batch program. At the same time, the use of two toggle switches can prevent misoperation.

The circuit breaker 204 is connected with the contactor 205 to form a power distribution circuit to supply power to the variable pitch system to be tested. The fault protection device can be specifically a circuit breaker 204, which is externally connected to a three-phase AC power supply input. In practical applications, the circuit breaker 204 is also It can be replaced by an air switch or other devices that protect the circuit from failure. The air switch, also known as an air circuit breaker, is a switch that will automatically disconnect as long as the current in the circuit is too large. Therefore, the circuit can be cut off in case of serious overload, short circuit, undervoltage and other faults, and all circuit components in the power distribution circuit and the line can be protected in real time.

The contactor 205 is connected with the PLC 101 and is used to power on and off the pitch control system connected to it under the control of the PLC 101 . It should be noted that the contact is the executive part of the contactor, and the contactor includes the main contact. The function of the main contact is to connect and disconnect the main circuit and control a large current. The internal structure of the contactor includes electromagnetic coil, spring and armature. When the electromagnetic coil of the contactor is not energized, the reaction force of the spring and the self-weight of the armature keep the main contact in the disconnected position. When the electromagnetic coil is connected to the control voltage, the electromagnetic force overcomes the reaction force of the spring and attracts the armature to the static iron core, driving the main contact to close, thereby connecting the circuit.

In this embodiment, the contactor 205 is connected to the digital input point of the PLC101, and the function of the contactor 205 is to control the strong current by the weak current as mentioned above, that is, to use 24V to control the on-off of the three-phase alternating current, which is equivalent to a switch, for example , the contactor receives the turn-on level signal sent by PLC101, and the contactor makes a pull-in action, thereby turning on the power distribution circuit that supplies power to the pitch control system to be tested. For example, wiring and other tasks need to be done before the test. In order to ensure the safety of the testers, the PLC 101 can send a turn-on level signal (eg 24V) to control the disconnection of the contactor 205 .

The contactor 205 may include an auxiliary contact. Since the signal flow direction of the PLC101 to control the action of the contactor 205 is unidirectional, the PLC101 does not know whether the contactor operates according to the control command it sends. At the same time as the action, the auxiliary contact will make the same action. PLC101 can judge the on-off state of the contactor by detecting the on-off state of the auxiliary contact, so that PLC101 can know whether the contactor is in accordance with the control command it sends. Action, where the auxiliary contact acts as a signal feedback. For example, if PLC101 detects that the auxiliary contact is open, it means that the contactor is also open.

The wireless module 206 is connected with the PLC101, and the PLC101 can communicate with the pitch system through the Profibus communication cable, receive the pitch status data uploaded by the pitch system, and then send it to the mobile terminal through the wireless module 206, so that testers can use it anywhere The pitch status information can be viewed in real time from the mobile terminal at any test location, without the need for debugging personnel, multiple operators, and special personnel to observe the display screen as in the traditional test method.

In practical applications, the mobile terminal may be, for example but not limited to, a handheld screen, a smart phone, a tablet computer, and the like. Preferably, the PLC 101 uses the PROFIBUS-DP bus to communicate with the pitch control system. PROFIBUS–DP (Decentralized Periphery) has high speed and low cost, and is used for communication between device-level control systems and distributed I/O. It forms the PROFIBUS standard together with PROFIBUS-PA (Process Automation) and PROFIBUS-FMS (Fieldbus Message Specification).

The remote emergency stop switch 207 is connected with the PLC101, receives the stop signal sent by the external remote control device, and forwards it to the PLC101, and the PLC101 controls the circuit breaker 204 to disconnect according to the stop signal, thereby powering off the test device.

The input end of the switching power supply 208 is connected to single-phase in the three-phase alternating current, and the output end is 24V direct current, supplies power for the PLC101, the first switch 202, the second switch 203, the wireless module 206, the remote control emergency stop switch 207 and the indicator light 209 .

The indicator light 209 is used to indicate whether the test device is powered on, has a fault, and the like. It should be noted that the testing device may include at least one indicator light.

The test device for the pitch control system of the embodiment of the utility model is connected to the PLC with two switching switches capable of generating a switch trigger signal, and the PLC switches and executes the test operation for the pitch control system of different types of wind power generating units according to the switch trigger signal. That is, one test device can test multiple series of wind turbine pitch control systems, thereby reducing the number of test devices and lowering the test cost, and the use of two switching switches can prevent misoperation. The test device is small in size and light in weight, which is convenient for on-site use. In addition, it uses wireless communication with the mobile terminal so that testers can view the pitch status information in real time. , The tester can press the emergency stop operation at any position. Compared with the emergency stop switch on the traditional test device, it ensures the safety of the test process.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. a proving installation for pitch-variable system, is characterized in that, comprising:

Test commutation circuit, generates handoff trigger signal;

PLC, is connected with described test commutation circuit, switches the test operation performed for different aerogenerator set type according to described handoff trigger signal.

2. the proving installation of pitch-variable system according to claim 1, is characterized in that, described test commutation circuit comprises the first change-over switch and the second change-over switch;

Described first change-over switch, it sends the first switching signal;

Described second change-over switch, it sends the second switching signal;

Described PLC also for after receiving described first switching signal, receives described second switching signal, and counts the number of times receiving described second switching signal, switches the test operation performing corresponding pitch-variable system according to count results.

3. the proving installation of pitch-variable system according to claim 1, is characterized in that, described proving installation is connected by the pitch-variable system of signaling transfer point block from different aerogenerator set type.

4. the proving installation of pitch-variable system according to claim 1, is characterized in that, described proving installation also comprises: distribution loop, by the external three-phase alternating-current powered input of power cable, for powering for described pitch-variable system.

5. the proving installation of pitch-variable system according to claim 1, it is characterized in that, described proving installation also comprises: wireless module, is connected with described PLC, and the change oar status data that the pitch-variable system for being received by described PLC is uploaded sends to mobile terminal.

6. the proving installation of pitch-variable system according to claim 1, is characterized in that, described proving installation also comprises: remote control emergency stop switch, is connected with described PLC, for receiving the stop signal that remote control equipment sends, and is transmitted to described PLC.

7. the proving installation of pitch-variable system according to claim 4, is characterized in that, described distribution loop comprises:

Fault protection device, for carrying out emergency protection to described distribution loop;

Contactor, is electrically connected with described fault protection device, described PLC and described pitch-variable system respectively, under the control of described PLC, is connected pitch-variable system energising and power-off.

8. the proving installation of pitch-variable system according to claim 7, it is characterized in that, described contactor comprises auxiliary contact, and described auxiliary contact are connected with described PLC, and described PLC judges the on off operating mode of described contactor by the on off operating mode detecting described auxiliary contact.

9. the proving installation of pitch-variable system according to claim 7, is characterized in that, described fault protection device is specially isolating switch or air switch.

10. the proving installation of pitch-variable system according to claim 1, is characterized in that, described PLC carries out communication by Process FieldbusROFIBUS Profibus communication cable and described pitch-variable system.