US 4,767,941 AGranted

Method for error-protected actuation of the switching devices of a switching station and an apparatus thereof

AssigneeBBC Brown, Boveri & Company, Limited

InventorsKlaus-Peter Brand, Jurgen Kopainsky, Wolfgang Wimmer

Life of this patent

Estimating the term…

Loading patent…

Abstract

A method for error-protected switching operation of switching devices of a high-voltage switching station. The current operational state of the station is determined from the signals provided by position indicating contacts (K.sub.I, K.sub.II, K.sub.III) of the switching devices. Using the obtained operational state, switching operation request commands (for example KA) are checked for release or blocking status by means of error-protected switching interlocking rules. In the case of changes in the topological configuration of the high-voltage switching station and/or in the case of changes of the error-protected switching interlocking rules, it is possible to adapt the basic method to these changes in a simple manner and without losing operational reliabilty. This is achieved by decoupling the topological configuration of the high-voltage switching station from the error-protected switching interlocking rules. To this end, the topological configuration of the high-voltage switching station and the error-protected switching interlocking rules are stored independently of each other. From current position indicating signals of the switching devices and the topological configuration, topological elements establishing the current operational state of the high-voltage switching station are formed by means of which the error-protected switching interlocking rules are interrogated for releasing or blocking a switching operation request commands (KE).

A method for carrying out error protected switching operations for a switching station having a plurality of nodes and switching devices between adjacent nodes, comprising the steps of:

storing data signals which contain information relating to all the nodes, and, for each node, the electrical state of bordering nodes which border on said each node;
establishing a topological configuration for the switching station;
storing a set of error-protected-switching interlocking rules which are based on and applicable to a basic set of topological elements and which are effective for establishing all operating states of any switching station of any arbitrary configuration, said interlocking rules being independent of said topological configuration of said switching station;
repeatedly interrogating position indicating contacts associated with said switching devices for determining the contact status of said switching devices;
temporarily storing signals received from the interrogation of said position indicating contacts;
logically combining said stored signals of said position indicating contacts with data signals which represent said topological configuration of said switching station and generating from said combination topological elements which belong to a basic set of topological elements and establishing an operating state for said switching stations;
temporarily storing said topological elements;
interrogating said stored error-protected-switching interlocking rules on the basis of said temporarily stored topological elements and generating from said interrogation a release pattern indicating a releasing or blocking status for each of said switching devices;
temporarily storing said release pattern;
and
interrogating said temporarily stored release pattern by and with a requested switching operation command and releasing or blocking said requested switching operation command based thereon in order to generate an error-free-switching operation command.

8 more elements

Abstract

Claims5