CN213870120U - Emergency yaw circuit for out-of-control rotating speed of wind turbine generator - Google Patents
Emergency yaw circuit for out-of-control rotating speed of wind turbine generator Download PDFInfo
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- CN213870120U CN213870120U CN202023093009.1U CN202023093009U CN213870120U CN 213870120 U CN213870120 U CN 213870120U CN 202023093009 U CN202023093009 U CN 202023093009U CN 213870120 U CN213870120 U CN 213870120U
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Abstract
The utility model discloses an emergent driftage circuit that wind turbine generator system's rotational speed is out of control. The circuit comprises a first speed relay, a first non-delay relay, a contactor and a first delay relay; a first normally open contact of the first non-time-delay relay, a normally closed contact of the first time-delay relay and a coil of the contactor are connected in series to form a series branch; the series branch is connected with a power supply; the normally open contact of the contactor is connected with the yawing device; a first contact of the first speed relay and a second normally open contact of the first non-delay relay are connected in parallel to form a first parallel branch; a second contact of the first speed relay is connected with a coil of the first non-delay relay in series and then is connected with the coil of the first delay relay in parallel to form a second parallel branch; the first parallel branch and the second parallel branch are connected in series and then are connected in parallel with the series branch. Adopt the utility model discloses a circuit can be greater than the processing of driftage of out of control of rated revolution to the rotational speed, prevents that wind turbine generator system from taking place driftage.
Description
Technical Field
The utility model relates to a wind turbine generator system control technical field especially relates to an emergent driftage circuit that wind turbine generator system's rotational speed is out of control.
Background
The reasons influencing the safe operation of the wind turbine generator set are various, the rotating speed of the wind turbine generator set can be out of control due to factors such as a fault of a variable pitch control system, a fault of a backup power supply, a fault of a slip ring, improper daily maintenance and management and the like, the runaway of the wind turbine generator set can be caused even under extreme conditions (namely, a braking system of the wind turbine generator set fails, the rotating speed of an impeller exceeds an allowable or rated rotating speed, and the wind turbine generator set is in an out-of-control state), if the wind turbine generator set cannot be effectively controlled, destructive attacks such as blade breakage and tower collapse can occur to the wind turbine generator set, and then huge economic loss is caused, and even personal safety is endangered.
The existing emergency yaw technology can only carry out yaw treatment on the out-of-control condition that the rotating speed is greater than the rated rotating speed. If the out-of-control of the rotating speed which is less than the rated rotating speed (namely the rotating speed is less than or equal to the rated rotating speed and the brake is in a braking state, but the rotating speed of the wind turbine generator is still greater than the safe rotating speed) cannot be effectively controlled, the wind turbine generator still frequently generates accidents. In addition, the existing emergency yaw circuit cannot stop yawing in time after being started, so that the wind turbine generator is over-yawing and damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a wind turbine generator's emergent driftage circuit that rotational speed is out of control can stop the driftage when wind turbine generator's rotational speed is less than or equal to safe rotational speed.
In order to achieve the above object, the utility model provides a following scheme:
an emergent driftage circuit that rotational speed of wind turbine generator system is out of control includes:
the relay comprises a first speed relay, a first non-delay relay, a contactor and a first delay relay;
a first normally open contact of the first non-time-delay relay, a normally closed contact of the first time-delay relay and a coil of the contactor are connected in series to form a series branch; the series branch is connected with a power supply; the normally open contact of the contactor is connected with the yawing device; the delay time of the first delay relay is the time taken by an impeller of the wind turbine generator to yaw to a preset angle;
a first contact of the first speed relay and a second normally open contact of the first non-delay relay are connected in parallel to form a first parallel branch; a second contact of the first speed relay is connected with a coil of the first non-time-delay relay in series and then connected with the coil of the first time-delay relay in parallel to form a second parallel branch; the first parallel branch and the second parallel branch are connected in series and then are connected in parallel with the series branch;
a first contact of the first speed relay is closed when the rotating speed of the wind turbine generator is greater than the rated rotating speed; a first contact of the first speed relay is disconnected when the rotating speed of the wind turbine generator is less than or equal to the rated rotating speed; the second contact of the first speed relay is closed when the rotating speed of the wind turbine generator is greater than the safe rotating speed; and the second contact of the first speed relay is disconnected when the rotating speed of the wind turbine generator is less than or equal to the safe rotating speed.
Optionally, the emergency yaw circuit further includes:
a second speed relay and a second time delay relay;
a coil of the second time delay relay is connected with a contact of the second speed relay in series and then is connected with a power supply;
a normally open contact of the second time delay relay is connected in series with a first contact of the first speed relay in the first parallel branch;
the contact of the second speed relay is closed when the rotating speed of the wind turbine generator is greater than the rated rotating speed; the contact of the second speed relay is disconnected when the rotating speed of the wind turbine generator is less than or equal to the rated rotating speed; and the normally open contact of the second time delay relay is closed when the closing time of the contact of the second speed relay reaches preset time.
Optionally, the emergency yaw circuit further includes:
a second non-time-delay relay;
the first end of the coil of the second non-delay relay is connected with a low level; the second end of the coil of the second non-delay relay is connected with a brake control device of the wind turbine generator; the brake control device comprises a switching part, a braking end and a non-braking end;
the second end of the coil of the second non-delay relay is connected with the non-braking end; a first end of the switching part is connected with a high level; the second end of the switching part is switched to the braking end when the wind turbine generator is normally braked and braked; the second end of the switching part is switched to the non-braking end when the wind turbine generator is normally and not braked or when the wind turbine generator is out of order in braking;
the normally closed contact of the second non-delay relay and the third contact of the first speed relay are connected in series and then are connected in parallel with the first parallel branch; the third contact of the first speed relay is closed when the rotating speed of the wind turbine generator is greater than the safe rotating speed; and the third contact of the first speed relay is disconnected when the rotating speed of the wind turbine generator is less than or equal to the safe rotating speed.
Optionally, the preset angle is 90 degrees.
Optionally, the safe rotation speed is 1 rpm/min.
Optionally, the yaw device is a yaw frequency converter.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a wind turbine generator system's emergent driftage circuit that rotational speed is out of control, first speed relay's first contact is closed when the rotational speed is greater than rated revolution in the emergent driftage circuit, and at this moment, first non-time delay relay's coil is got electric, and first non-time delay relay's normally open contact is closed to make the coil of contactor get electric, and contactor normally open contact is closed makes driftage device operation. And the normally closed contact of the first time delay relay is disconnected when the power-on time of the coil of the first time delay relay reaches the time delay of the first time delay relay (the time taken by an impeller of the wind turbine generator to yaw to a preset angle), and the yaw device stops acting. And in the time taken by the impeller of the wind turbine generator to yaw to a preset angle, the second contact of the first speed relay is disconnected when the rotating speed after yawing is less than or equal to the safe rotating speed, and the yawing device stops acting. The utility model provides an emergent driftage circuit can be when being greater than the out of control of rated revolution to the rotational speed and carrying out the driftage processing, prevents that wind turbine generator system from taking place driftage, reduces and driftage and causes the damage to wind turbine generator system.
The utility model provides an emergent driftage circuit has add the detection device (second non-time delay relay electrical apparatus) and the start branch road (being the normally closed contact of second non-time delay relay and the third contact series connection of first speed relay) of brake control device, and the start branch road is parallelly connected with first speed relay's first contact, and when impeller rotational speed was greater than safe rotational speed and brake, the coil of second non-time delay relay loses electricity, and normally closed contact is closed; the third contact of the first speed relay is closed, the coil of the first non-delay relay is electrified, the first normally open contact of the first non-delay relay is closed, so that the coil of the contactor is electrified, and the yawing device starts yawing. The utility model provides an emergent driftage circuit can be greater than the out of control of rated revolution and the out of control that the rotational speed is less than the rated revolution to the rotational speed and all carry out driftage processing, prevents simultaneously that wind turbine generator system from taking place driftage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a circuit diagram of an emergency yaw circuit in which the rotating speed of the wind turbine generator is out of control in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a wind turbine generator's emergent driftage circuit that rotational speed is out of control can stop the driftage when wind turbine generator's rotational speed is less than or equal to safe rotational speed.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Examples
Fig. 1 is a circuit diagram of an emergency yaw circuit in which the rotational speed of a wind turbine generator is out of control according to an embodiment of the present invention; in the figure, KF2 is a first speed relay, and 12, 34 and 56 marked at KF2 are a first contact, a second contact and a third contact of the first speed relay respectively; a KF1 second speed relay, 12 marked at KF1 being the contacts of the second speed relay; k1 is a first non-delay relay, and K11 and K12 are respectively a first normally open contact and a second normally open contact of the first non-delay relay; KM is a contactor; KT1 is a first time delay relay; KT3 is a second time delay relay; k2 second non-time-delay relay; s222.7 is a brake control device of the wind turbine generator, and 2, 3, and 5 marked at S222.7 are a switching part, a non-braking end, and a braking end of the brake control device, respectively. SB-forward means yaw left, SB-backward means yaw right, fb-SB means yaw manual.
As shown in fig. 1, the utility model provides an emergent driftage circuit that wind turbine generator system's rotational speed is out of control, include: the device comprises a first speed relay KF2, a first non-delay relay K1, a contactor KM and a first delay relay KT 1.
A first normally open contact of the first non-delay relay K1, a normally closed contact of the first delay relay KT1 and a coil of the contactor KM are connected in series to form a series branch; the series branch is connected with a power supply; a normally open contact of the contactor KM is connected with a yawing device; the delay time of the first delay relay KT1 is the time taken by an impeller of the wind turbine generator to yaw to a preset angle. Wherein, the yaw device is the yaw converter, and the preset angle is 90 degrees.
A first contact of a first speed relay KF2 and a second normally open contact of a first non-delay relay K1 are connected in parallel to form a first parallel branch; a second contact of the first speed relay KF2 is connected in series with a coil of the first non-delay relay K1 and then is connected in parallel with a coil of the first delay relay KT1 to form a second parallel branch; the first parallel branch and the second parallel branch are connected in series and then are connected in parallel with the series branch.
A first contact of a first speed relay KF2 is closed when the rotating speed of the wind turbine generator is greater than the rated rotating speed; a first contact of a first speed relay KF2 is disconnected when the rotating speed of the wind turbine generator is less than or equal to the rated rotating speed; a second contact of the first speed relay KF2 is closed when the rotating speed of the wind turbine generator is greater than the safe rotating speed; the second contact of the first speed relay KF2 is opened when the rotational speed of the wind turbine is less than or equal to the safe rotational speed. Wherein the rated rotating speed is greater than the safe rotating speed, and the safe rotating speed is 1 rpm/min.
The utility model provides an emergent driftage circuit of rotational speed out of control of wind turbine generator system still includes second speed relay KF1 and second time delay relay KT 3.
A coil of the second delay relay KT3 is connected in series with a contact of the second speed relay KF1 and then connected to a power supply (specifically, a first end of the coil of the second delay relay KT3 is connected to a first end of the contact of the second speed relay KF1, a second end of the coil of the second delay relay KT3 is connected to a low level, and a second end of the contact of the second speed relay KF1 is connected to a high level, which are not shown in fig. 1). The normally open contact of the second time delay relay KT3 is connected in series with the first contact of the first speed relay KF2 in the first parallel branch; a contact of a second speed relay KF1 is closed when the rotating speed of the wind turbine generator is greater than the rated rotating speed; the contact of the second speed relay KF1 is disconnected when the rotating speed of the wind turbine generator is less than or equal to the rated rotating speed; the normally open contact of the second delay relay KT3 is closed when the closing time of the contact of the second speed relay KF1 reaches a preset time. Wherein the high level is 24V, and the low level is 0V.
Furthermore, the utility model provides an emergent driftage circuit that wind turbine generator system's rotational speed is out of control still includes: a second non-time delay relay K2.
A first end of a coil of the second non-delay relay K2 is connected with a low level; the second end of the coil of the second non-delay relay K2 is connected with a brake control device of the wind turbine generator; the brake control device comprises a switching part, a brake end and a non-brake end; the second end of the coil of the second non-delay relay K2 is connected with the non-braking end; the first end of the switching part is connected with a high level; the second end of the switching part is switched to the braking end when the wind turbine generator is normally braked and braked; the second end of the switching part is switched to the non-braking end when the wind turbine generator is normally and not braked or when the wind turbine generator is out of order in braking. A normally closed contact of the second non-delay relay K2 and a third contact of the first speed relay KF2 are connected in series and then are connected in parallel with the first parallel branch; a third contact of a first speed relay KF2 is closed when the rotating speed of the wind turbine generator is greater than the safe rotating speed; the third contact of the first speed relay KF2 is opened when the rotational speed of the wind turbine generator is less than or equal to the safe rotational speed.
Specifically, the utility model provides an emergent driftage circuit that the rotational speed of wind turbine generator system is out of control carries out following control respectively to out of control when the rotational speed is greater than rated revolution and out of control when the rotational speed is less than rated revolution:
runaway when the rotating speed is greater than the rated rotating speed: the contact 12 of KF1 is closed, the coil of KT3 is electrified (delay relay), KT3 normally open contact is closed after set time is reached (the purpose of KT3 is that the contact of KF1 is frequently opened and closed due to signal instability, prevent the false start emergency yaw circuit), the first contact 12 of KF2 is closed, at this time, the coil of first delay relay KT1 is electrified, meanwhile, because the rotational speed is greater than safe rotational speed, the first contact 12 of KF2 is closed, the coil of K1 is electrified, the first normally open contact K11 and the second normally open contact K12 of K1 are closed simultaneously, the closed self-holding loop of K12 is switched on (the purpose of setting K12 is after the emergency yaw begins, the contact of KF1 is frequently opened due to signal instability, prevent the false cut emergency circuit), in the yaw time of KT1, the contact of KT1 is closed, K12 is closed so that the normally open coil of KM is electrified, the contact of yaw KM is closed, the manual operation plug box is equivalent to be connected to the manual operation plug box, and the unit is deflected leftwards or rightwards. When the coil of KT1 is electrified to the time delay of KT1, the normally closed contact of KT1 is disconnected, the coil of KM is deenergized, the normally open contact of KM is disconnected, and the yawing is finished. The upper limit of the yaw time (the delay time of KT 1) is the time used for 90 degrees of yaw, and in the upper limit of the yaw time, when the yaw is reduced to the impeller rotating speed and is reduced to 1rpm/min, the second contact 34 of KF2 is disconnected, the coil of K1 loses power, the first normally open contact K11 and the second normally open contact K12 of K1 are disconnected simultaneously, the self-holding loop is disconnected, the coil of KM loses power, the normally open contact of KM is disconnected, the emergency yaw circuit is cut off, and the speed reduction protection is completed.
Runaway when the rotating speed is less than the rated rotating speed: at the moment, the rotating speed of the impeller is greater than the safe rotating speed, the third contact 56 of the KF2 is closed, the brake is performed, the switching part 2 of the brake control device is switched to the brake end 5, the coil of the K2 is de-energized, the normally closed contact of the K2 is closed, the coil of the K1 is energized, the first normally open contact K11 and the second normally open contact K12 of the K1 are closed simultaneously, the K12 closed self-holding circuit is switched on (the purpose of setting the K12 is that after the emergency yawing starts, the first contact of the KF2 is frequently switched off due to signal instability, and the emergency yawing circuit is prevented from being switched off by mistake), in the delay time of the KT1, the normally closed contact of the KT1 is closed, the coil of the KM is energized due to the closing of the K12, the normally open contact of the KM is closed, the manual yawing plug part is equivalent to being connected to an operation box, and the unit is biased to the left or right. When the coil of KT1 is electrified for the preset delay time, the normally closed contact of KT1 is disconnected, the coil of KM loses electricity, the normally open contact of KM is disconnected, and the yawing is finished. The upper limit of the yaw time (the delay time of KT 1) is the time used for 90 degrees of yaw, and in the upper limit of the yaw time, when the yaw is reduced to the impeller rotating speed and is reduced to 1rpm/min, the second contact 34 of KF2 is disconnected, the coil of K1 loses power, the first normally open contact K11 and the second normally open contact K12 of K1 are disconnected simultaneously, the self-holding loop is disconnected, the coil of KM loses power, the normally open contact of KM is disconnected, the emergency yaw circuit is cut off, and the speed reduction protection is completed.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present description should not be construed as a limitation of the present invention.
Claims (6)
1. The utility model provides a wind turbine generator system's emergent driftage circuit of rotational speed out of control which characterized in that, emergent driftage circuit includes:
the relay comprises a first speed relay, a first non-delay relay, a contactor and a first delay relay;
a first normally open contact of the first non-time-delay relay, a normally closed contact of the first time-delay relay and a coil of the contactor are connected in series to form a series branch; the series branch is connected with a power supply; the normally open contact of the contactor is connected with the yawing device; the delay time of the first delay relay is the time taken by an impeller of the wind turbine generator to yaw to a preset angle;
a first contact of the first speed relay and a second normally open contact of the first non-delay relay are connected in parallel to form a first parallel branch; a second contact of the first speed relay is connected with a coil of the first non-time-delay relay in series and then connected with the coil of the first time-delay relay in parallel to form a second parallel branch; the first parallel branch and the second parallel branch are connected in series and then are connected in parallel with the series branch;
a first contact of the first speed relay is closed when the rotating speed of the wind turbine generator is greater than the rated rotating speed; a first contact of the first speed relay is disconnected when the rotating speed of the wind turbine generator is less than or equal to the rated rotating speed; the second contact of the first speed relay is closed when the rotating speed of the wind turbine generator is greater than the safe rotating speed; and the second contact of the first speed relay is disconnected when the rotating speed of the wind turbine generator is less than or equal to the safe rotating speed.
2. The wind turbine generator system speed runaway emergency yaw circuit of claim 1, further comprising:
a second speed relay and a second time delay relay;
a coil of the second time delay relay is connected with a contact of the second speed relay in series and then is connected with a power supply;
a normally open contact of the second time delay relay is connected in series with a first contact of the first speed relay in the first parallel branch;
the contact of the second speed relay is closed when the rotating speed of the wind turbine generator is greater than the rated rotating speed; the contact of the second speed relay is disconnected when the rotating speed of the wind turbine generator is less than or equal to the rated rotating speed; and the normally open contact of the second time delay relay is closed when the closing time of the contact of the second speed relay reaches preset time.
3. The wind turbine generator system speed runaway emergency yaw circuit of claim 2, further comprising:
a second non-time-delay relay;
the first end of the coil of the second non-delay relay is connected with a low level; the second end of the coil of the second non-delay relay is connected with a brake control device of the wind turbine generator; the brake control device comprises a switching part, a braking end and a non-braking end;
the second end of the coil of the second non-delay relay is connected with the non-braking end; a first end of the switching part is connected with a high level; the second end of the switching part is switched to the braking end when the wind turbine generator is normally braked and braked; the second end of the switching part is switched to the non-braking end when the wind turbine generator is normally and not braked or when the wind turbine generator is out of order in braking;
the normally closed contact of the second non-delay relay and the third contact of the first speed relay are connected in series and then are connected in parallel with the first parallel branch; the third contact of the first speed relay is closed when the rotating speed of the wind turbine generator is greater than the safe rotating speed; and the third contact of the first speed relay is disconnected when the rotating speed of the wind turbine generator is less than or equal to the safe rotating speed.
4. The emergency yaw circuit for the rotational speed runaway of a wind turbine generator as set forth in claim 1, wherein the preset angle is 90 degrees.
5. The emergency yaw circuit for the rotational speed runaway of a wind turbine generator as set forth in claim 1, wherein the safe rotational speed is 1 rpm/min.
6. The emergency yaw circuit for the rotational speed runaway of the wind turbine generator set according to claim 1, wherein the yaw device is a yaw frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023093009.1U CN213870120U (en) | 2020-12-21 | 2020-12-21 | Emergency yaw circuit for out-of-control rotating speed of wind turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023093009.1U CN213870120U (en) | 2020-12-21 | 2020-12-21 | Emergency yaw circuit for out-of-control rotating speed of wind turbine generator |
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| Publication Number | Publication Date |
|---|---|
| CN213870120U true CN213870120U (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023093009.1U Active CN213870120U (en) | 2020-12-21 | 2020-12-21 | Emergency yaw circuit for out-of-control rotating speed of wind turbine generator |
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| Country | Link |
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| CN (1) | CN213870120U (en) |
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2020
- 2020-12-21 CN CN202023093009.1U patent/CN213870120U/en active Active
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