Digital protection system for transmission lines and associated power equipment
First Claim
1. A method of monitoring and controlling the respective operating conditions of a plurality of electrical power transmission structures at a corresponding plurality of locations remote from each other comprising:
- sensing the operating condition of the power transmission structure at each of the locations;
digitizing the information corresponding to the sensed operating condition from each location;
communicating the digitized information to a microprocessing station at each location;
processing the digitized information with a predetermined algorithm to cause the generation of signals corresponding to the operating condition of the corresponding power transmission structure;
communicating the signals from each microprocessing station to a central processing region independently of the communication of the signals from the microprocessing stations of the other locations; and
changing the operating conditions of the transmission structure at a location corresponding to a predetermined operating condition detected by the receipt of digitized information at the corresponding microprocessing station.
0 Assignments
0 Petitions
Accused Products
Abstract
A system including a number of subsystems having dedicated protection units which are dedicated to the protection of specific transmission lines and associated power equipment, each subsystem having stand-alone capability. The subsystems are interfaced to a central computer through a remote control communications interface unit. Each subsystem includes a microprocessor which interfaces with the corresponding transmission line or associated power equipment to be protected through converters, sensors, contacters, direct digital control equipment and the like. The central computer is capable of performing real time modification by addressing each subsystem to change local protection parameters thereof to fit system needs. The system is totally digital, lending itself to integration into other digital control apparatus.
73 Citations
13 Claims
-
1. A method of monitoring and controlling the respective operating conditions of a plurality of electrical power transmission structures at a corresponding plurality of locations remote from each other comprising:
- sensing the operating condition of the power transmission structure at each of the locations;
digitizing the information corresponding to the sensed operating condition from each location;
communicating the digitized information to a microprocessing station at each location;
processing the digitized information with a predetermined algorithm to cause the generation of signals corresponding to the operating condition of the corresponding power transmission structure;
communicating the signals from each microprocessing station to a central processing region independently of the communication of the signals from the microprocessing stations of the other locations; and
changing the operating conditions of the transmission structure at a location corresponding to a predetermined operating condition detected by the receipt of digitized information at the corresponding microprocessing station. - View Dependent Claims (2, 3, 4, 5)
- sensing the operating condition of the power transmission structure at each of the locations;
-
6. A system for protecting a plurality of electrical power transmission structures, said structures being at locations remote from each other, each said structure having an actual operating condition and a defined range of operating conditions wherein protection is required when the actual operating condition is within the defined range, the system comprising:
- a plurality of subsystems, each said subsystem being operatively coupled to a respective power transmission structure for monitoring and controlling the operating condition thereof, each said subsystem includiing a digital information processor having an input and an output, sensor means operatively coupled to said structure for generating an electrical signal respresentative of the actual operating condition of said structure, means for transmitting said electrical signal to said input, said information processor having means for generating a control signal at said output when the actual operating condition is within said defined range, and means operatively coupling said output to the structure for changing the actual operating condition of the structure in response to said control signal;
a central computer remote from at least one said subsystem; and
means operatively coupling said central computer to said digital information processor for providing an interface therebetween such that data is communicated between said central computer and said digital information processor for communication with each said digital information processor independently of the other subsystems;
wherein each of said subsystems carries out its functions independent of said central computer and said interface means, whereby said structures remain protected in spite of a failure of said central computer or said interface means. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
- a plurality of subsystems, each said subsystem being operatively coupled to a respective power transmission structure for monitoring and controlling the operating condition thereof, each said subsystem includiing a digital information processor having an input and an output, sensor means operatively coupled to said structure for generating an electrical signal respresentative of the actual operating condition of said structure, means for transmitting said electrical signal to said input, said information processor having means for generating a control signal at said output when the actual operating condition is within said defined range, and means operatively coupling said output to the structure for changing the actual operating condition of the structure in response to said control signal;
Specification