CN211008956U

CN211008956U - Yaw control system of wind generating set

Info

Publication number: CN211008956U
Application number: CN201922121654.0U
Authority: CN
Inventors: 王�华; 王剑钊; 童彤; 任鑫; 王恩民; 王晨; 杨晓峰; 赵鹏程
Original assignee: Huaneng Clean Energy Research Institute
Current assignee: Huaneng Clean Energy Research Institute; Huaneng Dali Wind Power Co Ltd Eryuan Branch
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-14
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a wind generating set yaw control system, including first yaw controller, the second yaw controller, fan operating condition monitoring sensor, the driftage driver, driftage position sensor and driftage position counter, fan operating condition monitoring sensor includes generator speed sensor, power sensor and wind velocity transducer, fan operating condition monitoring sensor and driftage position sensor connect the input of first yaw controller, wind velocity transducer connects the input of second yaw controller and first yaw controller, the output of first yaw controller and the output of second yaw controller all connect the control signal input of driftage drive; the first yaw controller is used for controlling the yaw driver to achieve fan yaw, and when the working condition of extremely high wind speed occurs, the fan can continue to operate, so that support can be provided for reducing large-area cut-out of the wind driven generator under high wind speed, and impact on a power grid caused by sudden output change of a wind power plant can be avoided.

Description

Yaw control system of wind generating set

Technical Field

The utility model belongs to the technical field of wind-powered electricity generation, concretely relates to wind generating set yaw control system.

Background

The yaw system is one of indispensable component systems of a horizontal-axis wind generating set, is positioned in a cabin and has the function of capturing the wind direction when the wind direction changes so that the impeller obtains the maximum wind energy.

The yaw system generally comprises a wind vane, a yaw bearing, a yaw driving motor, a yaw gear box, a yaw limit switch and the like. The yaw system is controlled by the master control of the fan, and the conventional yaw control strategy is as follows:

1. automatic wind alignment in normal operation: when the engine room deviates from the wind direction by a certain angle, the control system sends a command of adjusting the direction to the left or the right, the engine room starts to face the wind, and the control system automatically stops facing the wind when knowing that the wind reaches the allowable range;

2. automatic cable unwinding during cable winding: when the engine room is deflected in the same direction to a certain angle, the system is controlled to stop, or the cable twisting fault is reported, the unit is automatically stopped, and a worker waits for manual cable untwisting;

3. deviation from wind direction at stall protection: when the wind speed is higher than the cut-out wind speed of the wind turbine, the wind turbine is automatically stopped, the blade tip is released, and the wind is leeward, so that the purpose of protecting the wind wheel from being damaged is achieved.

The problems of the existing scheme are as follows: the cut-out wind speed of the wind generating set is obtained by theoretical calculation according to the load which can be borne by each component of the set. Under the condition of high wind speed, the wind generating set can be repeatedly switched off and shut down due to wind speed fluctuation while bearing high load, and the safety and reliability of the wind turbine and the wind power plant are obviously threatened by changing the running state of the wind turbine for many times in a short time; and the wind driven generator can be cut out in a large area under high wind speed, so that the output of the wind power plant can be suddenly and suddenly reduced from nearly full power generation to zero, and the scheduling operation of the power grid is adversely affected.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a wind generating set yaw control system under the high wind speed condition, can be through control crosswind declination, the angle to the wind of adjustment impeller reaches the high wind speed condition and effectively avoids the great wind-force of forward and arouse impeller overspeed pivoted purpose, ensures under the prerequisite of fan safety, improves the wind speed working range of fan.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a yaw control system of a wind generating set comprises a first yaw controller, a second yaw controller, a selector, a fan operation condition monitoring sensor, a yaw driver, a yaw position sensor and a yaw position counter, wherein the fan operation condition monitoring sensor comprises a generator rotating speed sensor, a power sensor, a wind direction sensor and a wind speed sensor;

the wind speed sensor is connected with the input end of the first yaw controller, and the wind direction sensor is connected with the input end of the second yaw controller; the generator rotating speed sensor, the power sensor, the yaw position sensor and the yaw position counter are connected with the input ends of the first yaw controller and the second yaw controller;

the output end of the first yaw controller and the output end of the second yaw controller are both connected with the input end of the selector, and the output end of the selector is connected with the control signal input end of the yaw driver.

The first yaw controller and the second yaw controller both adopt a P L C controller.

The yaw position sensor employs a rotary encoder, and the yaw position sensor is provided at a yaw bearing.

The wind speed sensor is arranged on the top of the wind turbine cabin.

The aircraft further comprises a limit switch, the limit switch is connected with the input ends of the second yaw controller and the first yaw controller, and the limit switch is arranged at a large gear of the engine room.

And the fan operation condition monitoring sensor and the yaw position sensor are connected with the second yaw controller and the yaw controller through 24V lines.

The rotary encoder adopts a HENGST L ER-HSD photoelectric encoder, and the limit switch adopts Siemens 3SE5112-0CC 02.

Compared with the prior art, the utility model discloses following beneficial effect has at least: first yaw control ware is used for controlling the driftage driver and realizes that the fan drifts, when the very big operating mode of wind speed appears, first yaw control ware can send the driftage instruction to the driftage driver, driftage driver drive impeller motor carries out the action of driftage, enable the impeller side to the main wind direction, the fan can continue the operation, improve the fault-tolerant operation ability of unit, through the wind speed working range who improves the fan, can cut out the large tracts of land for aerogenerator probably under the reduction high wind speed and provide support, help avoiding wind-powered electricity generation field to exert oneself the sudden change and lead to the fact the impact to the electric wire netting.

Drawings

FIG. 1 is a schematic view of a yaw control system.

FIG. 2 is a schematic view of yaw control system control signals.

FIG. 3 is a schematic illustration of a crosswind yaw effect.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and fig. 2, a yaw control system of a wind turbine generator system includes a first yaw controller, a second yaw controller, a selector, a fan operating condition monitoring sensor, a yaw driver, a yaw position sensor, and a yaw position counter, where the fan operating condition monitoring sensor includes a generator speed sensor, a power sensor, a wind direction sensor, and a wind speed sensor;

the output end of the first yaw controller and the output end of the second yaw controller are both connected with the input end of a selector, and the output end of the selector is connected with the control signal input end of a yaw driver; and the priority of the output signal of the first yaw controller is higher than that of the output signal of the second yaw controller, the yaw position sensor is used for monitoring the current yaw angle of the fan and feeding back the current yaw angle to the first yaw controller and the second yaw controller, and the yaw counter is used for monitoring the number of turns of the last yaw action executed by the current yaw of the fan and feeding back the number of turns to the first yaw controller and the second yaw controller.

The first yaw controller is internally provided with an extra-large wind speed boundary value A, a wind speed sensor feeds a wind speed signal back to the first yaw controller, when the wind speed is greater than the extra-large wind speed boundary value A, the first yaw controller sends a first yaw instruction, the selector transmits the first yaw instruction to the yaw driver, and the yaw driver drives the impeller motor to execute corresponding yaw action to enable the impeller side to face the wind direction; when the wind speed is smaller than the boundary value A of the extra-large wind speed, the first yaw controller does not send a yaw instruction, the selector selects a second yaw instruction sent by the second yaw controller, the yaw driver receives the second yaw instruction and sends the second yaw instruction to the motor, and the motor drives the impeller to execute corresponding yaw action, so that the impeller is opposite to the main wind direction.

The first yaw controller and the second yaw controller are both P L C controllers, the yaw position sensor is a rotary encoder, the yaw position sensor is arranged at a yaw bearing, and the wind speed sensor is arranged on the top of the wind turbine cabin.

Still be provided with limit switch in the system, limit switch connects the input of second yaw control ware and first yaw control ware, and limit switch sets up in cabin bull gear department.

The yaw position sensor is used for measuring a yaw angle, a rotary encoder is used for metering, a yaw counter is used for counting the cable twisting angle of the impeller, and the action times of the yaw position sensor are counted to monitor whether cable twisting occurs.

The yaw control system comprises a first yaw controller, a second yaw controller, a yaw driver and a yaw position counter, wherein the first yaw controller is provided with a deviation signal of an extra-large wind speed boundary value A, the input signals of the deviation signal comprise a wind speed signal, a generator rotating speed signal and a fan power signal, the yaw position detects the deviation signal of the wind direction, and a yaw instruction is output to the yaw driver.

Claims

1. A yaw control system of a wind generating set is characterized by comprising a first yaw controller, a second yaw controller, a selector, a fan operation condition monitoring sensor, a yaw driver, a yaw position sensor and a yaw position counter, wherein the fan operation condition monitoring sensor comprises a generator rotating speed sensor, a power sensor, a wind direction sensor and a wind speed sensor;

2. The wind generating set yaw control system of claim 1, wherein the first yaw controller and the second yaw controller each employ a P L C controller.

3. The wind park yaw control system of claim 1, wherein the yaw position sensor employs a rotary encoder, the yaw position sensor being disposed at a yaw bearing.

4. The wind turbine generator set yaw control system of claim 1, wherein the wind speed sensor is disposed atop a wind turbine nacelle.

5. The wind generating set yaw control system of claim 1, further comprising a limit switch connected to inputs of the second yaw controller and the first yaw controller, the limit switch being disposed at a large gear of the nacelle.

6. The wind generating set yaw control system of claim 1, wherein the fan operating condition monitoring sensor and the yaw position sensor are connected to the second yaw controller and the yaw controller via a 24V line.

7. The yaw control system of a wind generating set according to claim 1, wherein the rotary encoder is a HENGST L ER-HSD photoelectric encoder, and the limit switch is siemens 3SE5112-0CC 02.