System for monitoring and assessing electrical circuits and method of operation
AssigneesConsolidated Edison Company of New York, Inc., Softstuf, Inc.
InventorsSanjay Bose, Anthony T. Giuliante, Amir Makki, Maria Rothweiler Makki
Life of this patent
Estimating the term…
Abstract
A system for collecting data and monitoring the operation of electrical circuits, such as branch circuits at a substation is provided. The system collects data from a plurality of sensors coupled to a plurality of electrical equipment associated with a circuit. The data from the sensors is collected and used to determine the activation of the electrical equipment, such as a protective relay for example. The data is further transformed to allow assessment of the circuit's performance against desired parameters.
Claims27
A method of identifying a relay, said method operable via a processor, said method comprising:
- coupling a first plurality of sensors to a relay trip ladder, wherein each of said first plurality of sensors is associated with one of a plurality of relays;
- collecting a first electrical data from said first plurality of sensors;
- identifying a trip signal on said trip ladder;
- determining a first relay of said plurality of relays from said first electrical data, wherein said first relay generated said trip signal;
- coupling a second plurality of sensors to a secondary side of a current transformer, wherein each of said second plurality of sensors is associated with one of said plurality of relays;
- collecting a second electrical data from said second plurality of sensors;
- determining a second relay from said second electrical data, wherein said second relay detected an electrical anomaly;
- and,
- generating an exception report indicating said trip signal and said identified relay, said exception report including a time, duration and description of the exception.
A method of identifying an activated relay in a protective relay cabinet, where said protective relay cabinet includes a first relay, a second relay and a third relay, each of said first relay, said second relay and said third relay being operably coupled to a circuit breaker by a trip ladder, said method operable via a processor, said method comprising:
- coupling a first sensor to said trip ladder adjacent said first relay;
- coupling a second sensor to said trip ladder adjacent said second relay;
- coupling a third sensor to said trip ladder adjacent said third relay;
- detecting a trip signal on said trip ladder;
- determining which of said first sensor, said second sensor and said third sensor measured said trip signal;
- determining said second relay generated said trip signal;
- coupling a fourth sensor to a secondary connection of a first current transformer associated with said first relay;
- coupling a fifth sensor to a secondary connection of a second current transformer associated with said second relay;
- coupling a sixth sensor to a secondary connection of a third current transformer associated with said third relay;
- detecting an electrical anomaly on said fourth sensor;
- and,
- determining if said second relay generated said trip signal;
- generating an exception report if said fifth sensor measured an electrical anomaly and said second relay did not generate said trip signal said exception report including a time, duration and description of the exception.
A system of assessing an electrical circuit on an electrical utility network, said system comprising a processor configured to perform a method, said method comprising:
- collecting a first data set of a first electrical parameter current during a first time period representing a first electrical parameter on a portion of said electrical utility network;
- collecting a second data set of said first electrical parameter during a second first time period representing a second electrical parameter on a portion of said electrical utility network;
- creating with said processor a graphical plot of said first data set and said second data set;
- comparing with said processor a characteristic of said graphical plot to a threshold parameter;
- determining that said threshold parameter has been violated by said characteristic.
A system of assessing an electrical circuit on an electrical utility network, said system having a processor configured to perform a method, said method comprising:
- collecting a first data set representing a first electrical parameter on a portion of said electrical utility network;
- collecting a second data set representing a second electrical parameter on said portion of said electrical utility network;
- collecting a third data set representing a third electrical parameter on said portion of said electrical utility network;
- storing on a tangible storage medium said first data set, said second data set and said third data set;
- generating with said processor a polar plot of said stored first data set, said stored second data set, and said stored third data set;
- comparing with said processor a characteristic of said polar plot to a threshold parameter;
- transmitting an alarm signal with said processor if said threshold parameter has been violated by said characteristic.
A system for assessing an electrical circuit on an electrical utility network, said system comprising:
- a first sensor measuring a first electrical parameter of said electrical circuit on a portion of said electrical utility network;
- a second sensor measuring a second electrical parameter of said electrical circuit on a portion of said electrical utility network;
- a data storage device operably coupled to store data received from said first sensor and said second sensor;
- and,
- a controller responsive to executable computer instructions when executed on the controller for generating a polar plot of said stored data, said controller further responsive to executable instructions to compare a characteristic of said polar plot to a threshold parameter, determining if said threshold parameter has been exceeded and transmitting an alarm signal in response to said threshold parameter.
Dependencies are inferred from the claim text.