Method for controlling a water sluice gate drive for a water sluice gate having an electric machine, service connection, water sluice gate drive and hydroelectric power plant

Patent metadata

Field	Value
Publication number	US-9758940-B2
Application number	US-201314654355-A
Country	US
Kind code	B2
Filing date	Dec 18, 2013
Priority date	Dec 21, 2012
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

The invention relates to a method for controlling a water sluice gate drive for a water sluice gate, in particular for a roller sluice gate, preferably in a hydroelectric power plant, wherein the drive has an electric machine, in particular has an asynchronous machine, in particular an asynchronous motor/generator. According to the invention, it is provided that the electric machine, in particular an asynchronous machine, has a fan brake, wherein the method comprises the steps of: disengagement of the fan brake in the case that an insufficient power supply is indicated, self-actuated operation of the electric machine, in particular an asynchronous machine, wherein the electric machine, in particular an asynchronous machine, is operated in generative island operation, in which a rotating field is generated in a self-actuating manner.

First claim

The invention claimed is:

1. A method for controlling a water sluice gate drive for a water sluice gate in a hydroelectric power plant, the method comprising:
detecting an emergency closure situation;
detecting an insufficient or absent power supply;
in response to detecting the insufficient power supply, disengaging a fan brake of an asynchronous machine;
in response to disengaging the fan brake, actuating operation of the asynchronous machine in a generative island operation and under an influence of a weight force of a vertical sluice gate of the water sluice gate;
generating, by a capacitor array of excitation capacitors, a rotating field in a self-actuating manner;
selecting at least one of a first speed step and a second speed step depending on at least one of a voltage and a position of the water sluice gate; and
regulating the asynchronous machine in at least one of the first speed step and the second speed step using at least one of a first stage of load resistors and a second stage of load resistors,
wherein at least one of first and second controls or adjustment control stages is run for the asynchronous machine while load shifting to the fan brake.

2. The method according to claim 1 , further comprising:
in response to detecting the sufficient power supply, detecting a power supply from at least one of a grid and a system for an uninterrupted power supply; and
operating the asynchronous machine using the power supply.

3. The method according to claim 1 , further comprising:
operating the asynchronous machine at variable rotational speeds in the event that the sufficient power supply is detected.

4. The method according to claim 1 , further comprising:
operating the asynchronous machine to close the water sluice gate; and
running an electric deceleration ramp for the asynchronous machine in the event that the sufficient power supply is detected.

5. The method according to claim 1 ,
wherein the insufficient power supply is detected in a system for an uninterrupted power supply.

6. The method according to claim 1 , further comprising:
in the event that the insufficient power supply is detected, operating the asynchronous machine at different rotational speeds and without a power supply.

7. The method according to claim 1 , wherein disengaging the fan brake includes an automatic and self-actuated lifting of the fan brake.

8. A water sluice gate drive for a water sluice gate for control of an asynchronous machine in a hydroelectric power plant, the water sluice gate drive comprising:
a fan brake;
an indicating unit configured to:
detect an emergency closure situation; and
detect an insufficient or absent power supply;

an actuator unit configured to disengage the fan brake in the event that the insufficient power supply is detected; and
a service connection for controlling the water sluice gate drive for self-actuated operation of the asynchronous machine, the service connection including:
a first stage of connectable load resistors having a first quantity of connectable load resistors;
a second stage of connectable load resistors having a second quantity of connectable load resistors;
a first control phase element configured to connect the first and second stages of connectable load resistors depending on at least one of a voltage and a position of the water sluice gate; and
a capacitor array of excitation capacitors configured to generate a rotating field in a self-actuating manner;
wherein the service connection is configured to:
operate the asynchronous machine in a generative island operation and under an influence of a weight force of a vertical sluice gate of the water sluice gate;
operate the first control phase element to regulate the asynchronous machine in at least a first speed step and a second speed step, wherein the first and second speed steps being selected depending on at least one of the voltage and the position of the water sluice gate; and
wherein at least one of first and second control or adjustment control stages are run for the asynchronous machine while load shifting to the fan brake.

9. The water sluice gate drive according to claim 8 ,
wherein the actuator unit includes a gas spring accumulator configured to disengage a brake spring of the fan brake.

10. The water sluice gate drive according to claim 8 ,
wherein the actuator unit has a control valve that is closed when energized and open when not energized, said control valve being located in an actuator pressure line between a pressure accumulator and a gas spring accumulator for the actuation of a brake spring of the fan brake.

11. The water sluice gate drive according to claim 8 ,
wherein the service connection in a second control phase element is configured to electrically control the asynchronous machine at a variable rotational speed by a conventional control current supply from a grid.

12. The water sluice gate drive according to claim 8 ,
wherein the service connection in a second control phase element is independent of a system for an uninterrupted power supply.

13. A hydroelectric power plant comprising:
a water sluice gate drive according to claim 8 that is configured to control of an electric machine for a water sluice gate.

Assignees

• Wobben Properties Gmbh

Inventors

• Janssen Andreas
• Uphoff Heinrich

Classifications

• E02B9/025 Primary

  automatically movable · CPC title

• E02B7/30 Primary

  with guide wheels or rollers for the gates · CPC title

• H02P3/04

  Means for stopping or slowing by a separate brake, e.g. friction brake or eddy-current brake · CPC title

• E02B9/022

  Closures · CPC title

• Y02E10/22

  Cross-Sectional Technologies · mapped topic