CN212202349U - Yaw start-stop protection circuit - Google Patents

Abstract

The utility model provides a driftage opens and stops protection circuit, including yaw motor group, controller, driftage converter, anemoscope, driftage counter, the driftage converter passes through main contactor and is connected with the power end, the output of driftage converter is connected with the yaw motor group, anemoscope, driftage counter are connected with the driftage converter, the controller is connected the control end of driftage converter; the yaw motor set comprises a plurality of yaw motors connected in parallel. The utility model discloses keep most original devices, transformation process and circuit are simple, easily transform, and easy construction can greatly reduced transform the cost.

Description

Yaw start-stop protection circuit

Technical Field

The utility model relates to a yaw generator system technical field, in particular to driftage opens and stops protection circuit.

Background

At present the yawing motor group yawing control strategy is comparatively old, adopts asynchronous machine to start, realizes the commutation through contactor switching, and the current impact is too big when this design approach drawback is motor start, causes the cabin emergency start scram, and it is great to strike each part of yawing motor group, and the harm that causes represents following several kinds of condition:

1) the mechanical impact is large due to rapid starting and rapid stopping, and the meshing clearance between a yaw gear ring and a speed reducer is enlarged due to long-term operation, so that the vibration fault of the unit is frequent;

2) the yaw speed reducer is easy to tooth, the fixing bolt is loosened, and shearing force is generated to cause bolt fracture;

3) the mechanical impact is large, and the abrasion of a yaw bearing and damping is intensified;

4) the mechanical impact is large, and the tooth surface of the yaw outer gear ring is broken due to long-term operation;

5) mechanical impact and engine room vibration are large, and damage can be brought to a mechanical structure of the tower drum after long-term operation.

6) The existing yaw motor set yaw starting and stopping circuit is high in modification cost, complex in circuit and not easy to construct.

SUMMERY OF THE UTILITY MODEL

The purpose of the present invention is to solve at least one of the technical drawbacks.

Therefore, the utility model aims to provide a driftage opens and stops protection circuit remains most original device, and transformation process and circuit are simple, easily transform, and easy construction can greatly reduced transform the cost.

In order to achieve the above object, an embodiment of the present invention provides a yaw start-stop protection circuit, which includes a yaw motor set, a controller, a yaw frequency converter, a wind direction indicator, and a yaw counter, wherein the yaw frequency converter is connected to a power supply end through a main contactor, an output end of the yaw frequency converter is connected to the yaw motor set, the wind direction indicator and the yaw counter are connected to the yaw frequency converter, and the controller is connected to a control end of the yaw frequency converter; the yaw motor set comprises a plurality of yaw motors connected in parallel.

In any of the above solutions, it is preferable that each yaw motor is connected to the yaw frequency converter through a secondary contactor.

In any of the above schemes, preferably, the yaw frequency converter includes a rectifying circuit, a filter circuit, a circuit protection circuit, and an inverter, the rectifying circuit is connected to the inverter through the filter circuit, and the filter circuit is further connected to the circuit protection circuit.

In any one of the above aspects, preferably, the yaw frequency converter further includes a dc reactor, one end of the dc reactor is connected to the filter circuit, and the other end of the dc reactor is connected to the inverter.

In any one of the above aspects, preferably, the yaw frequency converter further includes a gust suppression compensation circuit, and the gust suppression compensation circuit is connected to the circuit protection circuit.

In any of the above schemes, preferably, the gust suppression compensation circuit employs a high-power resistor, and the high-power resistor is connected in parallel with a braking resistor in the circuit protection circuit.

In any one of the above aspects, preferably, the anemoscope and the yaw counter are connected to the inverter.

In any of the above embodiments, preferably, the anemoscope and the yaw counter are further connected to a controller

In any of the above schemes, preferably, the controller is an MCU chip.

In any of the above aspects, preferably, the yaw frequency converter outputs an S-curve-like control signal to the yaw motor unit.

The utility model discloses a driftage is opened and is stopped protection circuit has following beneficial effect:

1. the utility model discloses keep most original devices, transformation process and circuit are simple, easily transform, and easy construction can greatly reduced transform the cost.

2. The utility model discloses can realize driftage buffering start-up and buffering stop comprehensively: the original yaw system can only adopt the method that the soft start component is adjusted after the signal of the controller is sent out, but the original yaw system can only stop by the main control yaw command and then stop rapidly because the wind direction and the deflection angle are not detected, so the buffer stop function cannot be solved; the utility model discloses a gather wind direction signal and driftage counter signal, obtain the totality angle of driftage, and then make in advance and slowly stop, make the system more stable, reduce mechanical impact force.

3. The utility model also adopts an independent yaw frequency converter, the yaw frequency converter is used for independently controlling the yaw motor set, and other systems of the machine set can not be directly controlled when the yaw frequency converter controls the yaw motor set; if the yaw speed reducer is directly controlled by the controller, and the yaw motor set is controlled by the yaw frequency converter, the yaw speed reducer and the yaw motor set are controlled independently.

4. The utility model discloses an independent driftage converter, its power is big, compares with the soft start components and parts of former driftage system, is more difficult to damage.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a main circuit diagram of an original yawing system;

fig. 2 is a main circuit diagram of the yaw start-stop protection circuit of the present invention;

FIG. 3 is a schematic diagram of the yaw frequency converter of the present invention;

fig. 4 is a schematic diagram of the S-like velocity curve signal according to the present invention.

In the figure, 11, a rectifier circuit; 12. a filter circuit; 13. a circuit protection circuit; 14. an inverter; u1, a controller; t1, yaw frequency converter; y1, anemoscope; j1, yaw counter;

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Fig. 1 is a main circuit diagram of an original yaw system, and as can be seen from fig. 1, 4 yaw motors of the original yaw system are connected in parallel by contactors, and are directly attracted by the contactors and provide power for the 4 yaw motors, so that the direction switching is realized, and the method belongs to a power frequency direct starting mode.

In order to solve the problem, the utility model provides a protection circuit is opened and stop to driftage, as shown in fig. 2, including the yaw motor group, controller U1, yaw converter T1, anemoscope Y1, yaw counter J1, yaw converter T1 is connected with the power end through main contactor Q1, the yaw motor group is connected to yaw converter T1's output, anemoscope Y1, yaw counter J1 are connected with yaw converter T1, controller U1 connects yaw converter T1's control end; the yaw motor group comprises a plurality of yaw motors M1-M4 connected in parallel.

Each yaw motor is connected with a yaw frequency converter T1 through a secondary contactor, namely a yaw motor M1 is connected with a yaw frequency converter T1 through a secondary contactor F1, the yaw motor M2 is connected with a yaw frequency converter T1 through a secondary contactor F2, the yaw motor M3 is connected with a yaw frequency converter T1 through a secondary contactor F3, and the yaw motor M4 is connected with the yaw frequency converter T1 through a secondary contactor F4. The anemoscope Y1 and the yaw counter J1 are connected to the inverter. The anemoscope Y1 and the yaw counter J1 are also connected with the controller U1, and the controller U1 selects an MCU chip.

Yaw motor starts theory of operation: and the controller closes the main contactor to electrify the yaw frequency converter, then controls the band-type brake of the main contactor to be opened, closes the secondary contactor between the output of the yaw frequency converter and the yaw motor, and then carries out yaw position initialization operation. After the initialization is completed, a ready-to-run signal and a zero-speed signal are output, and then the controller is waited to give a direction signal and a running speed signal. The controller gives a running direction signal (ascending or descending) to the yaw frequency converter, releases the brake of the secondary contactor, and gives a speed signal to the yaw frequency converter after delay. The yaw frequency converter controls the yaw motor to start, the yaw motor is slowly started in the starting process, then the yaw motor runs at a constant speed for a period of time after running to the maximum speed in an accelerating mode, when the system runs to a speed reducing point, the controller gives a crawling speed instruction to the yaw frequency converter, the yaw frequency converter controls the yaw motor to start to reduce the speed, and after the yaw frequency converter runs to a set point in a decelerating mode, the yaw motor starts to reduce the speed until the yaw motor stops. And after the yaw frequency converter stops, a zero-speed signal is output, and the controller controls the secondary contactor to close the brake.

According to the yaw working principle of the yaw motor, the anemoscope Y1 transmits a detected wind direction signal to the yaw frequency converter T1, and after the yaw frequency converter receives a yaw starting command sent by the controller, the yaw frequency converter starts to calculate the wind direction offset angle required to deflect by the yaw motor set according to the wind direction signal collected by the anemoscope Y1; then the yaw frequency converter controls the yaw motor set to start through voltage and frequency adjustment, so that the yaw motor is started slowly; the yaw frequency converter also acquires signals of a yaw counter constantly, and calculates the time for yaw by calculating the yaw angle and the wind direction offset; according to the calculated offset, before the unit is about to reach an ideal wind angle and the controller finishes a yaw command, the yaw frequency converter reduces the speed of the yaw motor unit by adjusting the voltage and the frequency; when the yaw signal sent by the controller stops, the yaw frequency converter stops working, and the system stops yawing.

As shown in fig. 3, the yaw frequency converter T1 includes a rectifier circuit 11, a filter circuit 12, a circuit protection circuit 13, and an inverter 14, the rectifier circuit 11 is connected to the inverter 14 through the filter circuit 12, and the filter circuit 12 is further connected to the circuit protection circuit 13.

The working principle of the yaw frequency converter is that a power supply is changed into a direct current circuit through a rectifying circuit 11, and is changed into alternating current through an inverter 14 after passing through a filter circuit 12 and a circuit protection circuit 13 and then is output to a yaw motor; the yaw frequency converter controls the start of a yaw motor by adjusting voltage and frequency.

The yaw frequency converter T1 further comprises a direct current reactor, one end of the direct current reactor is connected with the filter circuit, and the other end of the direct current reactor is connected with the inverter.

In the yawing process, gust can affect the power output of the yawing frequency converter, and if the influence of disturbance factors is not considered, the frequency converter is easy to be out of work due to overvoltage of a bus; in order to compensate gust disturbance in the actual operation of a field in the start-stop process, the yaw frequency converter T1 further comprises a gust suppression compensation circuit, and the gust suppression compensation circuit is connected with the circuit protection circuit. Preferably, the gust suppression compensation circuit adopts a high-power resistor, and the high-power resistor is connected in parallel with the braking resistor RB in the circuit protection circuit.

The utility model discloses a further embodiment, in order to further make yaw motor' S start-up obtain the buffering effect, driftage converter T1 exports class S curve control signal to the yaw motor group, as shown in FIG. 4, class S speed curve can divide into with higher speed, evenly accelerate, subtract with higher speed, at the uniform velocity, add the 7 processes of accelerating, evenly slow down, subtract and slow down.

The utility model discloses can realize driftage buffering start-up and buffering stop comprehensively: the original yaw system shown in fig. 1 can only adopt the method that the controller signal is sent out and then the soft start component is adjusted, but the original yaw system can only be stopped by a main control yaw command and then is stopped quickly because the wind direction and the deflection angle are not detected, so that the buffer stop function cannot be solved; the utility model discloses a gather wind direction signal and driftage counter signal, obtain the totality angle of driftage, and then make in advance and slowly stop, make the system more stable, reduce mechanical impact force.

The utility model also adopts an independent yaw frequency converter, the yaw frequency converter is used for independently controlling the yaw motor set, and other systems of the machine set can not be directly controlled when the yaw frequency converter controls the yaw motor set; if the yaw speed reducer is directly controlled by the controller, and the yaw motor set is controlled by the yaw frequency converter, the yaw speed reducer and the yaw motor set are controlled independently.

The utility model discloses keep most original devices, transformation process and circuit are simple, easily transform, and easy construction can greatly reduced transform the cost.

The utility model discloses an independent driftage converter, its power is big, compares with the soft start components and parts of former driftage system, is more difficult to damage.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A yaw start-stop protection circuit is characterized by comprising a yaw motor set, a controller, a yaw frequency converter, a wind direction instrument and a yaw counter, wherein the yaw frequency converter is connected with a power supply end through a main contactor, the output end of the yaw frequency converter is connected with the yaw motor set, the wind direction instrument and the yaw counter are connected with the yaw frequency converter, and the controller is connected with the control end of the yaw frequency converter; the yaw motor set comprises a plurality of yaw motors connected in parallel.

2. The yaw start-stop protection circuit of claim 1, wherein each of the yaw motors is connected to the yaw inverter through a secondary contactor.

3. The yaw start-stop protection circuit of claim 1, wherein the yaw frequency converter comprises a rectifying circuit, a filter circuit, a circuit protection circuit and an inverter, the rectifying circuit is connected with the inverter through the filter circuit, and the filter circuit is further connected with the circuit protection circuit.

4. The yaw start-stop protection circuit of claim 3, wherein the yaw frequency converter further comprises a direct current reactor, one end of the direct current reactor is connected with the filter circuit, and the other end of the direct current reactor is connected with the inverter.

5. The yaw start-stop protection circuit of claim 3, wherein the yaw frequency converter further comprises a gust suppression compensation circuit, the gust suppression compensation circuit connected to the circuit protection circuit.

6. The yaw start-stop protection circuit of claim 5, wherein the gust suppression compensation circuit employs a high power resistor, and the high power resistor is connected in parallel with a brake resistor in the circuit protection circuit.

7. The yaw start stop protection circuit of claim 3, wherein the anemoscope, yaw counter and the inverter are connected.

8. The yaw start stop protection circuit of claim 1, wherein the anemoscope and yaw counter are further connected to a controller.

9. The yaw start-stop protection circuit of claim 1, wherein the controller is an MCU chip.

10. The yaw start-stop protection circuit of claim 1, wherein the yaw frequency converter outputs an S-curve-like control signal to a yaw motor assembly.

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