US 4,507,703 A · System for error-protected operation of multipanel, power distribution network switches

Abstract

An arrangement for generating in each switching panel of a multipanel switching facility of an electrical power distribution network a digital operating-state image derived from command inputs and switching position signals. The digital operating state image is transmitted to a collecting memory arranged in a coupling panel which produces an overall image of all switching panels; which overall image is transmitted to the individual switching panels at periodic time intervals. A checking procedure is then conducted in the individual switching panels using the overall image. The arrangement utilizes microprocessors which are coupled to one another so as to exchange data via several transmission paths which are one-bit wide. This arrangement obviates the need for an interlock cable harness in the switching panels and cross-cabling between the switching panels.

Claims14

Dependent claims

A method of operating a switching facility with protection against switching errors, the switching facility consisting of several switching panels in an electric power distribution network, the method comprising the steps of:

generating a digital image of the operating state of each switching panel utilizing signals from switches within said switching panel;
simulating a requested switching action;
interrogating continuously and sequentially digital images cyclically from individual ones of the switching panels;
transmitting said digital images to a central collecting memory;
assembling said digital images to form an overall image;
transmitting said overall image to each switching panel;
storing said overall image in each switching panel until a subsequent overall image arrives;
requesting a switching action;
checking for switching error protection interlock conditions in response to information contained in an overall image arriving subsequently and the switching action requested;
and
executing said switching action if the result of said step of checking is negative.

8 more elements

An arrangement for operating a switching facility consisting of several switching panels in an electric power distribution network with protection against switching errors, the arrangement comprising:

first signal generating means for producing position indicating signals identifying actual switch positions in the several switching panels;
second signal generating means for producing switching action request signals indicating desired switch positions in said switching panels;
a plurality of switching panel processor means arranged in respective ones of the switching panels for generating switching commands to change the actual switch positions in said switching panels;
central image collecting processor means for communicating with each of said switching panel processor means;
a plurality of bidirectional transmission means coupling respective ones of said plurality of switching processor means to said central image collecting processor means for transmitting thereto encoded images of the operating states of switches and for transmitting to said switching processor means from said central image collecting processor means a digital overall image, said encoded images including said position indicating signals and said switching action request signals;
and
AND logic means for linking said switching commands delivered by said switching panel processor means with associated ones of said switching action request signals for execution of said switching commands.

4 more elements

Dependencies are inferred from the claim text.

System for error-protected operation of multipanel, power distribution network switches

Life of this patent

System for error-protected operation of multipanel, power distribution network switches

Life of this patent

Abstract

Claims14