Reclosing apparatus for auxiliary systems

• US 6,385,023 B1
• Filed: 11/12/1999
• Issued: 05/07/2002
• Est. Priority Date: 11/19/1998
• Status: Expired due to Fees

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: Asea Brown Boveri AG (ABB Limited)
• Inventors: Pednekar, Sudhir, Goebelbecker, Theo, Blatter, Richard, Schlett, Hans-Werner
• Primary Examiner(s): Ballato, Josie
• Assistant Examiner(s): HUYNH, KIM NGOC
• Application Number:
  US09/438,585
• Time in Patent Office: 907 Days
• Field of Search: 361/59-75, 307/11, 307/17-19, 307/29, 307/38-42, 307/112-116, 307/125, 307/126, 307/139, 307/141.4, 700/286, 700/295
• US Class Current: 361/71
• CPC Class Codes: H02J 11/00 Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted

Abstract

A reclosing apparatus for the auxiliary systems of a plant, in particular a power station, has drive modules (81) for actuating electrical drives (23a, 23b, 33, 53a, 53b, 63, 73) of the auxiliary systems. Each drive module (81) of a reclosable drive (23a, 33, 53a, 63, 73) is assigned a reclosing module (82). When a voltage interruption occurs, the reclosing modules (82) switch the drives (23a, 33, 53a, 63, 73) by opening switches (22a, 32a, 52a, 62, 72). If the end of the voltage interruption is detected within a predetermined time, the reclosing modules (82) switch the drives (23a, 33, 53a, 63, 73) on again. Each busbar (2, 3, 5, 6, 7) which supplies a drive (23a, 33, 53a, 63, 73) provided with a reclosing module (82) is equipped with a microprocessor-controlled voltage monitoring device (21).

Claims

1. Reclosing apparatus for a plant comprising:

a plurality of jointly supplied electrical drives, having at least one voltage monitoring device,

at least two reclosing modules which are electrically connected to the at least one voltage monitoring device in order to transmit voltage values, and for which the reclosing time of each module is individually adjustable, and

at least two drive modules, where each drive module comprises control and protection logic for a single electrical drive and is configured to actuate the electrical drive, which drive modules are electrically connected to the reclosing modules wherein each reclosing module is configured to transmit switching commands to a drive module in order to switch an electrical drive off and on, depending on a transmitted voltage value, and each reclosing module is assigned one, and only one, drive module.

2. Reclosing apparatus according to claim 1, characterized in that at least two voltage monitoring devices are provided, and in that each reclosing module is assigned one, and only one, voltage monitoring device.

3. Reclosing apparatus according to claim 1, characterized in that the at least one voltage monitoring device contains at least one microprocessor for measurement and evaluation of the voltage.

4. Reclosing apparatus according to claim 3, characterized in that the at least one voltage monitoring device has a converter for cyclic sampling and evaluation of the voltage.

5. Reclosing apparatus according to claim 4, characterized in that the converter has a sampling time of less than 100 ms.

6. Reclosing apparatus according to claim 1, characterized in that the at least one voltage monitoring device has a display for the measured voltage, and/or is connected to a device for displaying the measured voltage.

7. Reclosing apparatus according to claim 1, characterized in that the at least one voltage monitoring device has a recording unit for storing the measured voltage, and/or is connected to a device for storing the measured voltage.

8. Plant having a plurality of jointly supplied electrical drives and having a reclosing apparatus according to claim 1, characterized in that the drives are connected to one another by busbars which supplies at least one drive which is operatively connected to a reclosing module is assigned to dedicated voltage monitoring device in order to transmit voltage information relating to this busbar to the at least one associated reclosing module.