CN212376789U

CN212376789U - Backup over-speed protection control system of wind generating set

Info

Publication number: CN212376789U
Application number: CN202020932179.5U
Authority: CN
Inventors: 林奔腾; 倪肖泉; 吴中标; 易长安
Original assignee: Huayi Wind Energy Co ltd
Current assignee: Huayi Wind Energy Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-19
Anticipated expiration: 2030-05-28

Abstract

The utility model relates to a wind generating set reserve overspeed protection control system. The technical scheme adopted comprises the following steps: the system comprises an impeller rotating speed detection device, a programmable speed control module and a plurality of protection action relays, wherein the impeller rotating speed detection device is used for detecting the rotating speed of an impeller of the wind generating set, the programmable speed control module is used for receiving rotating speed signals detected by the impeller rotating speed detection device, sending different commands to the protection action relays at different rotating speeds according to set values, and connecting safety chain feedback contacts of the wind driven generator in series to the protection action relay action loop.

Description

Backup over-speed protection control system of wind generating set

Technical Field

The utility model relates to a wind generating set reserve overspeed protection control system.

Background

The wind power generator is an electric power device which converts wind energy into mechanical work, and the mechanical work drives a rotor to rotate so as to finally output alternating current. The wind-driven generator generally comprises wind wheels, a generator (including a device), a direction regulator (empennage), a tower, a speed-limiting safety mechanism, an energy storage device and other components. When the wind generating set runs for a long time, serious operation faults can happen accidentally, so that the blades cannot be retracted normally, and at the moment, if the main control protection measures cannot be implemented normally, the rotating speed of the impeller rises continuously, and the set has the danger of galloping and tower falling.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a wind generating set reserve overspeed protection control system.

In order to solve the above problem, the utility model discloses a technical scheme include: the system comprises an impeller rotating speed detection device, a programmable speed control module and a plurality of protection action relays, wherein the impeller rotating speed detection device is used for detecting the rotating speed of an impeller of the wind generating set, the programmable speed control module is used for receiving rotating speed signals detected by the impeller rotating speed detection device, sending different commands to the protection action relays at different rotating speeds according to set values, and connecting safety chain feedback contacts of the wind driven generator in series to the protection action relay action loop.

Wind generating set reserve overspeed protection control system, its characterized in that: the impeller rotating speed detection device is a proximity switch.

Wind generating set reserve overspeed protection control system, its characterized in that: the system also comprises a test manual yaw starting button used for detecting whether the protection system operates normally.

The utility model discloses a wind generating set reserve overspeed protection control system advantage: when a serious fault occurs during the operation of the wind generating set, the rotating speed of the set impeller is overhigh, and the normal protection measures of the main control of the set cannot be started due to other faults, the backup protection system is started at the moment, the hardware control loop provides an additional emergency yaw function, and the set automatically yaws to reduce the rotating speed of the impeller and avoid the tower falling accident of the set.

Drawings

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

FIG. 1 is a schematic diagram of a backup overspeed protection control system of a wind generating set of the present invention;

fig. 2 and 3 are circuit diagrams of the backup overspeed protection control system of the wind generating set of the utility model.

Detailed Description

As shown in fig. 1 to 3, the utility model discloses a backup overspeed protection control system of wind generating set, include: the impeller rotating speed detection device 101, the programmable speed control module 202 and a plurality of protective action relays 303. The impeller rotating speed detection device 101 preferably adopts a proximity switch, which is installed on the wind generating set and used for detecting the rotating speed of the impeller of the wind generating set. The programmable speed control module 202 is configured to receive a rotation speed signal detected by the impeller rotation speed detection device 101, and send different commands to the protection action relay 303 at different rotation speeds according to a set value. And the safety chain feedback contacts of the wind power generator are connected in series to the action loop of the protective action relay 303. Only when the safety chain is disconnected, the standby protection control can act, so that frequent false triggering of the yaw protection control due to electromagnetic interference is reduced. In addition, a manual yaw start button 404 for testing whether the protection system is operating normally can be added to the tower bottom.

The protection steps of the system are as follows:

the 356U2 programmable speed control module receives 356S1 impeller speed signals in real time, judges whether the impeller speed exceeds n1, if the impeller speed exceeds n1, the 356U2 overspeed module No. 13 port outputs high level, judges whether the safety chain is disconnected, if the safety chain is disconnected, the 356K7 relay is attracted, controls the 219K8 and 221K8 relays to be attracted, opens the pressure half release of the yaw brake and the electromagnetic brake of the yaw motor, and prepares for emergency yaw; and when the rotating speed is less than n1, delaying the No. 13 port of the 356U2 overspeed module for 134 seconds to stop outputting the high level, and finishing the protection action. If the safety chain is not disconnected, the unit has no fault, which may be false operation of the 356U2 overspeed module due to interference production, and the protection action is not started.

If the rotating speed of the impeller exceeds n2, outputting a high level by a No. 15 port of the 356U2 overspeed module, judging whether a safety chain is disconnected or not, and if the safety chain is disconnected, attracting a 356K8 relay to attract a 220K7 relay, electrifying a yaw driving system and starting a unit to yaw; and when the rotating speed is less than n2, delaying the No. 15 port of the 356U2 overspeed module for 134 seconds to stop outputting the high level, and finishing the protection action. If the safety chain is not disconnected, the unit has no fault, which may be false operation of the 356U2 overspeed module due to interference production, and the protection action is not started. Wherein the rotating speed n2 is more than n1, so that before the emergency automatic yawing, the pressure of the yawing brake is released in a half way and the electromagnetic brake of the yawing motor is opened.

After pressing the emergency yaw test button at the tower bottom 1S3, the relay 15K7 is attracted, whether the safety chain is disconnected or not is judged at the moment, if the safety chain is disconnected, the relay 356K7 is attracted, the relays 219K8 and 221K8 are attracted, the pressure of a yaw brake is half released, and the electromagnetic brake of a yaw motor is opened; after the 17K8 time delay relay 1S time delay, the 15K8 relay is attracted, whether the safety chain is disconnected or not is judged at the moment, if the safety chain is disconnected, the 356K8 relay is attracted, the 220K7 relay is attracted, a yaw driving system is electrified, and the unit starts to yaw; if the safety chain is not disconnected, the protection action is not started. After the 1S3 button is pulled up, the 15K7 and 15K8 relays are disconnected, and the test is finished.

The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention are all included within the protection scope of the present invention.

Claims

1. A backup overspeed protection control system of a wind generating set is characterized by comprising: the wind driven generator protection system comprises an impeller rotating speed detection device (101), a programmable speed control module (202) and a plurality of protection action relays (303), wherein the impeller rotating speed detection device (101) is used for detecting the rotating speed of an impeller of a wind driven generator set, the programmable speed control module (202) is used for receiving rotating speed signals detected by the impeller rotating speed detection device (101), sending different commands to the protection action relays (303) according to set values at different rotating speeds, and connecting safety chain feedback contacts of the wind driven generator in series to action loops of the protection action relays (303).

2. The wind generating set backup overspeed protection control system of claim 1, characterized in that: the impeller rotating speed detection device (101) is a proximity switch.

3. The wind generating set backup overspeed protection control system of claim 1, characterized in that: a test manual yaw start button (404) is also included for detecting whether the protection system is functioning properly.