Wind turbine generator set sidewind yaw electrical control system, method and generator set

Abstract

The present invention relates to the technical field of wind power generation, and discloses a wind turbine generator set crosswind yaw electrical control system, method and wind turbine generator set, the system comprising: a speed acquisition module, a pressure acquisition module, a master control module, a mode control module, a hydraulic pump control module and a yaw motor control module; the master control module is respectively connected with the speed acquisition module, the pressure acquisition module, the mode control module, the hydraulic pump control module and the yaw motor control module, the mode control module is connected with the hydraulic pump control module and the yaw motor control module, the hydraulic pump control module is connected with the hydraulic pump, and the yaw motor control module is connected with the yaw motor. The present invention can trigger the yaw electrical circuit to be turned on by outputting a common DO when an overspeed triggers an emergency stop fault of the unit and the safety chain is disconnected, and then the yaw motor can receive the control command of the master control module to perform crosswind yaw action, thereby effectively reducing the speed of the wind turbine and ensuring that the speed of the unit is within a safe range.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power generator set sidewind yaw electrical control system, method and generator set. Background Art

[0002] The yaw system of a wind turbine can also be called a wind-facing system. Since the wind direction changes frequently, if the wind turbine's rotor sweeping surface is not perpendicular to the wind direction, the power output will be reduced. The function of the yaw system is to track the change in wind direction and drive the nacelle to rotate around the center line of the tower to maximize wind energy.

[0003] However, if the wind is too strong, it may cause the unit to overspeed. In the event of overspeed, an emergency stop fault will be triggered and the unit will disconnect the safety chain. At this time, the yaw DO has no output and the unit cannot yaw in the crosswind. In the event of unit overspeed, if the wind turbine rotor swept surface remains perpendicular to the wind direction, serious consequences will occur. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a wind turbine generator set sidewind yaw electrical control system, method and generator set in view of the problems existing in the prior art.

[0005] To solve the above technical problems, an embodiment of the present invention provides a wind turbine generator set sidewind yaw electrical control system, including: a speed acquisition module, a pressure acquisition module, a master control module, a mode control module, a hydraulic pump control module, a yaw motor control module, a hydraulic pump and a yaw motor.

[0006] The master control module is respectively connected to the speed acquisition module, the pressure acquisition module, the mode control module, the hydraulic pump control module and the yaw motor control module; the mode control module is connected to the hydraulic pump control module and the yaw motor control module; the hydraulic pump control module is connected to the hydraulic pump; and the yaw motor control module is connected to the yaw motor.

[0007] The speed acquisition module is used to acquire the speed of the unit in real time; the pressure acquisition module is used to acquire the pressure of the hydraulic pump in real time; the master control module is used to output a normal DO control instruction to the mode control module when an emergency stop fault is triggered according to the speed of the unit, and send a hydraulic pump DO control instruction to the hydraulic pump control module; the mode control module is used to turn on the corresponding mode control branch according to the normal DO control instruction; the hydraulic pump control module is used to turn on the corresponding control branch according to the hydraulic pump DO control instruction, and drive the hydraulic pump to work; the master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure; the yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction, and drive the yaw motor to work.

[0008] The beneficial effect of the present invention is that when an overspeed occurs to the unit and an emergency stop fault is triggered, and the safety chain is disconnected, the yaw electrical circuit is triggered to be turned on by outputting a normal DO, and then the yaw motor can receive the control command of the master control module to perform a side wind yaw action, thereby effectively reducing the fan speed, ensuring that the unit speed is within a safe range, and ensuring the safety of the unit.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the master control module is also used to output an emergency stop DO control instruction to the mode control module and send a hydraulic pump DO control instruction to the hydraulic pump control module when the unit speed is within a normal range; the mode control module is used to turn on the corresponding mode control branch according to the emergency stop DO control instruction; the hydraulic pump control module is used to turn on the corresponding control branch according to the hydraulic pump DO control instruction, and drive the hydraulic pump to work; the master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure; the yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction, and drive the yaw motor to work.

[0011] The beneficial effect of adopting the above further scheme is that when the unit speed is within the normal range, the yaw electrical circuit is triggered to be turned on by outputting the emergency stop DO, thereby executing normal yaw action, tracking the change of wind direction, driving the cabin to rotate around the center line of the tower, and trying to obtain maximum wind energy.

[0012] Further, the mode control module includes: an emergency stop DO control contactor, an ordinary DO control contactor and a cascade contactor; one end of the coil of the emergency stop DO control contactor is connected to the main control module, and the other end is connected to the ground wire, and one end of the coil of the ordinary DO control contactor is connected to the main control module, and the other end is connected to the ground wire; the normally open contact of the emergency stop DO control contactor and the normally open contact of the ordinary DO control contactor are connected in parallel, and one end of the parallel structure is connected to a DC power supply, and the other end is connected to a first end of the cascade contactor coil, and the second end of the cascade contactor coil is connected to the ground wire; the first end of the normally open contact of the cascade contactor is connected to an AC power supply, and the second end is respectively connected to a hydraulic pump control module and a yaw motor control module.

[0013] The beneficial effect of adopting the above further scheme is that by setting an emergency stop DO control contactor and a normal DO control contactor, the emergency stop DO control instructions and the normal DO control instructions issued by the main control module can be respectively accepted, and the hydraulic pump control module and the yaw motor control module are connected through the cascade contactor to realize the cascade of the mode control module with the hydraulic pump control module and the yaw motor control module.

[0014] Further, the hydraulic pump control module includes a hydraulic pump motor protection switch and a first hydraulic pump control relay; one end of the coil of the first hydraulic pump control relay is connected to the main control module, and the other end is connected to the ground wire; one end of the hydraulic pump motor protection switch is connected to the second end of the normally open contact of the cascade contactor, and the other end of the hydraulic pump motor protection switch is connected to one end of the normally open contact of the first hydraulic pump control relay, and the other end of the normally open contact of the first hydraulic pump control relay is connected to the hydraulic pump.

[0015] The beneficial effect of adopting the above further scheme is that the hydraulic pump motor protection switch is in a normally closed state. When a special situation occurs, the hydraulic pump motor protection switch is disconnected, thereby protecting the safety of the hydraulic pump motor; the first hydraulic pump control relay receives the hydraulic pump DO control instruction of the main control module through the coil, and then the normally open contact of the first hydraulic pump control relay is closed, that is, the automatic control branch of the hydraulic pump control module is turned on, thereby driving the hydraulic pump to work.

[0016] Further, the yaw motor control module includes a yaw motor protection switch and a first yaw motor control relay; one end of the coil of the first yaw motor control relay is connected to the main control module, and the other end is connected to the ground wire; one end of the yaw motor protection switch is connected to the second end of the normally open contact of the cascade contactor, and the other end of the yaw motor protection switch is connected to one end of the normally open contact of the first yaw motor control relay, and the other end of the normally open contact of the first yaw motor control relay is connected to the yaw motor.

[0017] The beneficial effect of adopting the above further scheme is that the yaw motor protection switch is in a normally closed state. When a special situation occurs, the yaw motor protection switch is disconnected, thereby protecting the safety of the yaw motor; the first yaw motor control relay receives the yaw motor DO control instruction of the main control module through the coil, and then the normally open contact of the first yaw motor control relay is closed, that is, the automatic control branch of the yaw motor control module is turned on, thereby driving the yaw motor to work.

[0018] Furthermore, the mode control module also includes a manual control contactor, the hydraulic pump control module also includes a second hydraulic pump control relay, and the yaw motor control module also includes a second yaw motor control relay; the manual control contactor is connected in parallel with the normally open contact of the emergency stop DO control contactor and the normally open contact of the ordinary DO control contactor; the second hydraulic pump control relay is connected in parallel with the normally open contact of the first hydraulic pump control relay; the second yaw motor control relay is connected in parallel with the normally open contact of the first control yaw motor control relay.

[0019] The beneficial effect of adopting the above further scheme is that by adding a manual control contactor, a second hydraulic pump control relay and a second yaw motor control relay, when the main control module fails and cannot issue an emergency stop DO control command or a normal DO control command, the yaw electrical circuit can be manually controlled to be turned on, thereby achieving crosswind yaw.

[0020] In order to solve the above technical problems, an embodiment of the present invention provides a method for implementing yaw control by using the yaw electrical control system of a wind turbine generator set described in the above technical solution, comprising:

[0021] When the emergency stop fault is triggered according to the unit speed, the master control module outputs a normal DO control instruction to the mode control module and sends a hydraulic pump DO control instruction to the hydraulic pump control module;

[0022] The mode control module is used to turn on the corresponding mode control branch according to the common DO control instruction;

[0023] The hydraulic pump control module is used to conduct the corresponding control branch according to the hydraulic pump DO control instruction and drive the hydraulic pump to work;

[0024] The master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure;

[0025] The yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction and drive the yaw motor to work.

[0026] Based on the above technical solution, the present invention can also be improved as follows.

[0027] Further, when the unit speed is within the normal range, the master control module outputs an emergency stop DO control instruction to the mode control module, and sends a hydraulic pump DO control instruction to the hydraulic pump control module;

[0028] The mode control module is used to turn on the corresponding mode control branch according to the emergency stop DO control instruction;

[0029] The hydraulic pump control module is used to conduct the corresponding control branch according to the hydraulic pump DO control instruction and drive the hydraulic pump to work;

[0030] The master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure;

[0031] The yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction and drive the yaw motor to work.

[0032] Further, the master control module outputs an emergency stop DO control instruction or a normal DO control instruction to the mode control module according to the unit speed, and sends a hydraulic pump DO control instruction to the hydraulic pump control module;

[0033] Alternatively, after the master control module outputs an emergency stop DO control instruction or a normal DO control instruction to the mode control module according to the unit speed, it sends a hydraulic pump DO control instruction to the hydraulic pump control module after a delay of a preset time.

[0034] In order to solve the above technical problems, an embodiment of the present invention further provides a wind turbine generator set, comprising the wind turbine generator set sidewind yaw electrical control system described in the above technical solution.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A block diagram of a wind turbine generator set sidewind yaw electrical control system provided by an embodiment of the present invention;

[0037] Figure 2 An electrical connection diagram of a wind turbine generator set sidewind yaw electrical control system provided by an embodiment of the present invention;

[0038] Figure 3 An overspeed judgment logic diagram of the master control module provided in an embodiment of the present invention;

[0039] Figure 4 A logic diagram of the sidewind yaw electrical control provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0041] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0042] Figure 1 This is a block diagram of a wind turbine generator set sidewind yaw electrical control system provided by an embodiment of the present invention. Figure 1 As shown, the system includes: a speed acquisition module 101 , a pressure acquisition module 102 , a general control module 103 , a mode control module 104 , a hydraulic pump control module 105 , a yaw motor control module 106 , a hydraulic pump 107 and a yaw motor 108 .

[0043] The master control module 103 is respectively connected to the speed acquisition module 101, the pressure acquisition module 102, the mode control module 104, the hydraulic pump control module 105 and the yaw motor control module 106; the mode control module 104 is connected to the hydraulic pump control module 105 and the yaw motor control module 106; the hydraulic pump control module 105 is connected to the hydraulic pump 107; and the yaw motor control module 106 is connected to the yaw motor 108.

[0044] The speed acquisition module 101 is used to acquire the speed of the unit in real time; the pressure acquisition module 102 is used to acquire the pressure of the hydraulic pump in real time.

[0045] In one embodiment, the master control module 103 is used to output a normal DO control instruction to the mode control module 104 and send a hydraulic pump DO control instruction to the hydraulic pump control module 105 when an emergency stop fault is triggered according to the unit speed; the mode control module 104 is used to turn on the corresponding mode control branch according to the normal DO control instruction; the hydraulic pump control module 105 is used to turn on the corresponding control branch according to the hydraulic pump DO control instruction, and drive the hydraulic pump to work; the master control module 103 is used to send a yaw motor DO control instruction to the yaw motor control module 106 when the hydraulic pump is depressurized to a preset pressure; the yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction, and drive the yaw motor to work.

[0046] When the unit is overspeeding, it may cause serious consequences. In order to reduce losses and ensure the safety of the unit, the industry requires that the unit should have the ability to automatically deviate from the main wind direction and reduce the fan speed after overspeeding to ensure that the unit speed is within a safe range. When the fan deviates from the main wind direction by 90 degrees, the fan can minimize the absorption of wind energy, thereby reducing the harm. At present, general wind turbines do not have the crosswind yaw function in the event of an overspeed emergency.

[0047] The embodiment of the present invention adds electrical components such as DO and relays. When the unit overspeeds and triggers an emergency stop fault and the safety chain is disconnected, the yaw electrical circuit is triggered to be turned on by outputting a normal DO. Then the yaw motor can receive the control command of the master control module to perform side wind yaw action, thereby effectively reducing the fan speed, ensuring that the unit speed is within a safe range, and ensuring the safety of the unit.

[0048] In one embodiment, the master control module 103 is used to output an emergency stop DO control instruction to the mode control module 104 and send a hydraulic pump DO control instruction to the hydraulic pump control module 105 when the unit speed is within a normal range; the mode control module 104 is used to turn on the corresponding mode control branch according to the emergency stop DO control instruction; the pressure pump control module 105 is used to turn on the corresponding control branch according to the hydraulic pump DO control instruction, and drive the hydraulic pump to work; the master control module 103 is used to send a yaw motor DO control instruction to the yaw motor control module 106 when the hydraulic pump is depressurized to a preset pressure; the yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction, and drive the yaw motor to work.

[0049] In the above embodiment, when the unit speed is within the normal range, the emergency stop DO is output to trigger the yaw electrical circuit to be turned on, thereby performing normal yaw action to track the change in wind direction, drive the cabin to rotate around the center line of the tower, and try to obtain maximum wind energy.

[0050] Figure 2The electrical connection diagram of the wind turbine yaw electrical control system provided by the embodiment of the present invention. U1 and U2 are input voltages, U1 is DC, and U2 is AC (U1 is generally 24V, 12V, etc., and U2 is 400V); K1 is an emergency stop DO control contactor; K2 is a common DO control contactor; K3 is a manual control contactor. K4 is a cascade contactor, and the coil input voltage is U1; Q1 is a hydraulic pump motor protection switch, which is in a closed state; M1 is a hydraulic pump; Q2 is a yaw motor protection switch, which is in a closed state; M2 is a yaw motor; K5 is a first pressure pump control relay; K6 is a first yaw motor control relay; K7 is a second hydraulic pump control relay; K8 is a second yaw motor control relay.

[0051] In one embodiment, the mode control module 103 includes: an emergency stop DO control contactor K1, a common DO control contactor K2 and a cascade contactor K4. One end of the coil of the emergency stop DO control contactor K1 is connected to the main control module 103, and the other end is connected to the ground wire. One end of the coil of the common DO control contactor K2 is connected to the main control module 103, and the other end is connected to the ground wire. The normally open contact of the emergency stop DO control contactor K1 and the normally open contact of the common DO control contactor K2 are connected in parallel, and one end of the parallel structure is connected to a DC power supply, and the other end is connected to the first end of the coil of the cascade contactor K4, and the second end of the coil of the cascade contactor K4 is connected to the ground wire. The first end of the normally open contact of the cascade contactor K4 is connected to an AC power supply, and the second end is respectively connected to the hydraulic pump control module 105 and the yaw motor control module 106.

[0052] In the above embodiment, by setting an emergency stop DO control contactor and a normal DO control contactor, the emergency stop DO control instructions and the normal DO control instructions issued by the main control module can be respectively received, and the hydraulic pump control module and the yaw motor control module are connected through the cascade contactor to realize the cascade of the mode control module with the hydraulic pump control module and the yaw motor control module.

[0053] Optionally, in one embodiment, the hydraulic pump control module 105 includes a hydraulic pump motor protection switch Q1 and a first hydraulic pump control relay K5. One end of the coil of the first hydraulic pump control relay K5 is connected to the master control module 103, and the other end is connected to the ground wire; one end of the hydraulic pump motor protection switch Q1 is connected to the second end of the normally open contact of the cascade contactor K4, and the other end of the hydraulic pump motor protection switch Q1 is connected to one end of the normally open contact of the first hydraulic pump control relay K5, and the other end of the normally open contact of the first hydraulic pump control relay is connected to the hydraulic pump M1.

[0054] In the above embodiment, the hydraulic pump motor protection switch is in a normally closed state. When a special situation occurs, such as a stall or overcurrent during motor operation, the hydraulic pump motor protection switch is disconnected, which can effectively provide protection and cut off the power supply circuit, thereby protecting the safety of the hydraulic pump motor; the first hydraulic pump control relay receives the hydraulic pump DO control instruction of the main control module through the coil, and then the normally open contact of the first hydraulic pump control relay is closed, that is, the automatic control branch of the hydraulic pump control module is connected, thereby driving the hydraulic pump to work.

[0055] Optionally, in one embodiment, the yaw motor control module 106 includes a yaw motor protection switch Q2 and a first yaw motor control relay K6; one end of the coil of the first yaw motor control relay is connected to the main control module 103, and the other end is connected to the ground wire; one end of the yaw motor protection switch Q2 is connected to the second end of the normally open contact of the cascade contactor, and the other end is connected to one end of the normally open contact of the first yaw motor control relay K6, and the other end of the normally open contact of the first yaw motor control relay is connected to the yaw motor M2.

[0056] In the above embodiment, the yaw motor protection switch is in a normally closed state. When a special situation occurs, such as stalling, overcurrent, etc. during motor operation, the yaw motor protection switch is disconnected, which can effectively protect the motor and cut off the power supply circuit, thereby protecting the safety of the yaw motor; the first yaw motor control relay receives the yaw motor DO control instruction of the master control module through the coil, and then the normally open contact of the first yaw motor control relay is closed, that is, the automatic control branch of the yaw motor control module is turned on, thereby driving the yaw motor to work.

[0057] Optionally, in one embodiment, the mode control module also includes a manual control contactor K3, the hydraulic pump control module 105 also includes a second hydraulic pump control relay K7, and the yaw motor control module 106 also includes a second yaw motor control relay K8; the manual control contactor K3 is connected in parallel with the normally open contact of the emergency stop DO control contactor and the normally open contact of the ordinary DO control contactor; the second hydraulic pump control relay K7 is connected in parallel with the normally open contact of the first hydraulic pump control relay; the second yaw motor control relay K8 is connected in parallel with the normally open contact of the first yaw motor control relay K6.

[0058] In the above embodiment, by adding a manual control contactor, a second hydraulic pump control relay and a second yaw motor control relay, when the main control module fails and cannot issue an emergency stop DO control command or a normal DO control command, the yaw electrical circuit can be manually controlled to be turned on, thereby achieving crosswind yaw.

[0059] like Figure 3As shown, an embodiment of the present invention provides a method for implementing yaw control by using the yaw electrical control system of a wind turbine generator set described in the above embodiment, comprising the following steps:

[0060] S310, when the emergency stop fault is triggered according to the unit speed, the master control module outputs a common DO control instruction to the mode control module, and sends a hydraulic pump DO control instruction to the hydraulic pump control module;

[0061] S320, the mode control module is used to turn on the corresponding mode control branch according to the common DO control instruction;

[0062] S330, the hydraulic pump control module is used to conduct the corresponding control branch according to the hydraulic pump DO control instruction and drive the hydraulic pump to work;

[0063] S340, the master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure;

[0064] S350, the yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction and drive the yaw motor to work.

[0065] Optionally, in one embodiment, when the unit speed is within a normal range, the main control module outputs an emergency stop DO control instruction to the mode control module, and sends a hydraulic pump DO control instruction to the hydraulic pump control module; the mode control module is used to turn on the corresponding mode control branch according to the emergency stop DO control instruction; the hydraulic pump control module is used to turn on the corresponding control branch according to the hydraulic pump DO control instruction, and drive the hydraulic pump to work; the main control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure; the yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction, and drive the yaw motor to work.

[0066] Optionally, in one embodiment, the master control module outputs an emergency stop DO control instruction or a normal DO control instruction to the mode control module according to the unit speed, and at the same time sends a hydraulic pump DO control instruction to the hydraulic pump control module; or, after the master control module outputs an emergency stop DO control instruction or a normal DO control instruction to the mode control module according to the unit speed, it delays for a preset period of time and sends a hydraulic pump DO control instruction to the hydraulic pump control module.

[0067] The following describes the details of the technical solution of the present invention in detail with a specific embodiment. In the embodiment of the present invention, the master control module can adopt a PLC control module.

[0068] like Figure 4As shown, a method for implementing yaw control using the wind turbine generator set yaw electrical control system described in the above embodiment includes the following steps:

[0069] Determine whether the unit speed exceeds the protection limit M. If so, the unit is considered to be overspeeding, otherwise the unit is in normal condition.

[0070] 1) PLC makes the judgment. When the unit is in normal condition, the yaw action sequence is as follows: emergency stop DO output → K1 energizes → K4 coil is energized → K4 energizes → PLC gives hydraulic pump action command → K5 energizes → M1 acts → when the hydraulic pump is depressurized to the preset pressure, PLC gives yaw motor action command → K6 energizes → M2 acts.

[0071] 2) When the unit is in overspeed condition, the yaw action sequence is as follows: normal DO output → K2 energizes → K4 coil energizes → K4 energizes → PLC gives hydraulic pump action command → K5 energizes → M1 acts → when the hydraulic pump is depressurized to the preset pressure, PLC gives yaw motor action command → K6 energizes → M2 acts.

[0072] 3) When the unit is in an overspeed condition and the PLC module is stuck and unable to output control signals, K5 and K6 cannot be controlled by the PLC. The yaw control sequence is: manual button controls K3 to energize → K4 coil is energized → K4 is energized → manual button controls K5 to energize → M1 is actuated → manual button controls K6 to energize → M2 is actuated.

[0073] In an embodiment of the present invention, when the yaw condition is met, the main control PLC of the unit issues a yaw command, the hydraulic pump starts to work, the pressure of the yaw system is released to the set value, and the yaw motor starts to work to yaw. Under normal circumstances (the unit is not overspeeding), the yaw of the unit is controlled by the emergency stop DO, and the module will provide a yaw output, and the emergency stop DO output will control the entire power supply circuit. When the unit is overspeeding, the yaw DO has no output, and the unit cannot yaw, that is, in the case of overspeed, the yaw output is no longer controlled by the emergency stop DO, but is controlled by the ordinary DO. In the case of overspeeding and the PLC is stuck, the PLC module cannot output the control, and the embodiment of the present invention adopts manual control of the entire power supply circuit. The embodiment of the present invention provides a control method for the electrical circuit of the wind turbine under various operating conditions to ensure that the wind turbine operates normally under normal conditions and achieves crosswind yaw under overspeed.

[0074] The embodiment of the present invention provides a wind turbine generator set, including the wind turbine generator set sidewind yaw electrical control system provided by the above embodiment. The wind turbine generator set according to the embodiment of the present invention can operate normally under normal conditions and achieve sidewind yaw under overspeed conditions.

[0075] 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 wind turbine generator set sidewind yaw electrical control system, characterized in that: include: Speed ​​acquisition module, pressure acquisition module, master control module, mode control module, hydraulic pump control module, yaw motor control module, hydraulic pump and yaw motor; The master control module is connected to the speed acquisition module, the pressure acquisition module, the mode control module, the hydraulic pump control module and the yaw motor control module respectively; the mode control module is connected to the hydraulic pump control module and the yaw motor control module; the hydraulic pump control module is connected to the hydraulic pump; and the yaw motor control module is connected to the yaw motor; The speed acquisition module is used to acquire the speed of the unit in real time; the pressure acquisition module is used to acquire the pressure of the hydraulic pump in real time; The master control module is used to output a common DO control instruction to the mode control module and send a hydraulic pump DO control instruction to the hydraulic pump control module when an emergency stop fault is triggered according to the unit speed; The mode control module is used to turn on the corresponding mode control branch according to the common DO control instruction; The mode control module includes: an emergency stop DO control contactor, a common DO control contactor and a cascade contactor; One end of the coil of the emergency stop DO control contactor is connected to the main control module, and the other end is connected to the ground wire; one end of the coil of the ordinary DO control contactor is connected to the main control module, and the other end is connected to the ground wire; The normally open contact of the emergency stop DO control contactor is connected in parallel with the normally open contact of the common DO control contactor, and one end of the parallel structure is connected to a DC power supply, and the other end is connected to a first end of a cascade contactor coil, and a second end of the cascade contactor coil is connected to a ground wire; The first end of the normally open contact of the cascade contactor is connected to the AC power supply, and the second end is connected to the hydraulic pump control module and the yaw motor control module respectively; The hydraulic pump control module is used to conduct the corresponding control branch according to the hydraulic pump DO control instruction and drive the hydraulic pump to work; The master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure; The yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction and drive the yaw motor to work.

2. The wind turbine generator set sidewind yaw electrical control system according to claim 1, characterized in that: The master control module is also used to output an emergency stop DO control instruction to the mode control module and send a hydraulic pump DO control instruction to the hydraulic pump control module when the unit speed is within a normal range; The mode control module is used to turn on the corresponding mode control branch according to the emergency stop DO control instruction; The hydraulic pump control module is used to conduct the corresponding control branch according to the hydraulic pump DO control instruction and drive the hydraulic pump to work; The master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure; The yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction and drive the yaw motor to work.

3. The wind turbine generator set sidewind yaw electrical control system according to claim 1, characterized in that: The hydraulic pump control module includes a hydraulic pump motor protection switch and a first hydraulic pump control relay; One end of the coil of the first hydraulic pump control relay is connected to the main control module, and the other end is connected to the ground wire; one end of the hydraulic pump motor protection switch is connected to the second end of the normally open contact of the cascade contactor, and the other end of the hydraulic pump motor protection switch is connected to one end of the normally open contact of the first hydraulic pump control relay, and the other end of the normally open contact of the first hydraulic pump control relay is connected to the hydraulic pump.

4. The wind turbine generator set sidewind yaw electrical control system according to claim 3, characterized in that: The yaw motor control module includes a yaw motor protection switch and a first yaw motor control relay; One end of the coil of the first yaw motor control relay is connected to the main control module, and the other end is connected to the ground wire; one end of the yaw motor protection switch is connected to the second end of the normally open contact of the cascade contactor, and the other end of the yaw motor protection switch is connected to one end of the normally open contact of the first yaw motor control relay, and the other end of the normally open contact of the first yaw motor control relay is connected to the yaw motor.

5. The wind turbine generator set sidewind yaw electrical control system according to claim 4, characterized in that: The mode control module further includes a manual control contactor, the hydraulic pump control module further includes a second hydraulic pump control relay, and the yaw motor control module further includes a second yaw motor control relay; The manual control contactor is connected in parallel with the normally open contact of the emergency stop DO control contactor and the normally open contact of the common DO control contactor; The second hydraulic pump control relay is connected in parallel with the normally open contact of the first hydraulic pump control relay; The second yaw motor control relay is connected in parallel with a normally open contact of the first yaw motor control relay.

6. A method for implementing yaw control using the wind turbine yaw electrical control system according to any one of claims 1 to 5, characterized in that: include: When the emergency stop fault is triggered according to the unit speed, the master control module outputs a common DO control instruction to the mode control module and sends a hydraulic pump DO control instruction to the hydraulic pump control module; The mode control module is used to turn on the corresponding mode control branch according to the common DO control instruction; The hydraulic pump control module is used to conduct the corresponding control branch according to the hydraulic pump DO control instruction and drive the hydraulic pump to work; The master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure; The yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction and drive the yaw motor to work.

7. The method according to claim 6, characterized in that When the unit speed is within the normal range, the master control module outputs an emergency stop DO control command to the mode control module and sends a hydraulic pump DO control command to the hydraulic pump control module; The mode control module is used to turn on the corresponding mode control branch according to the emergency stop DO control instruction; The hydraulic pump control module is used to conduct the corresponding control branch according to the hydraulic pump DO control instruction and drive the hydraulic pump to work; The master control module is used to send a yaw motor DO control instruction to the yaw motor control module when the hydraulic pump is depressurized to a preset pressure; The yaw motor control module is used to turn on the corresponding control branch according to the yaw motor DO control instruction and drive the yaw motor to work.

8. The method according to claim 7, characterized in that The master control module outputs an emergency stop DO control instruction or a normal DO control instruction to the mode control module according to the unit speed, and sends a hydraulic pump DO control instruction to the hydraulic pump control module; Alternatively, after the master control module outputs an emergency stop DO control instruction or a normal DO control instruction to the mode control module according to the unit speed, it sends a hydraulic pump DO control instruction to the hydraulic pump control module after a delay of a preset time.

9. A wind turbine generator set, characterized in that: The invention comprises the wind turbine generator set sidewind yaw electrical control system as claimed in any one of claims 1 to 5.

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