Electrical network protection system
First Claim
1. An electrical protection system comprising:
- a first Rogowski coil positioned to detect a first current and generate a first current measurement;
a second Rogowski coil positioned to detect a second current and generate a second current measurement, wherein a first protection zone is defined based on a positioning of the first Rogowski coil and the second Rogowski coil; and
a first protection device operable to determine from the first current measurement and the second current measurement, the existence of a first fault that is associated with a first circuit element within the first protection zone.
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Accused Products
Abstract
Protection systems for electrical systems are described, where the electrical systems may include spot networks and/or grid networks. The various protection systems may be designed and used to detect and clear faults that may occur within the electrical systems. For example, a pair of Rogowski coils may be used to detect current along a conductors at their respective locations on the conductors, and to output corresponding signals to a multi-function, differential relay having multiple voltage and current inputs. By comparing the signals from the Rogowski coils, the differential relay may determine whether a fault exists at some point along the conductors and between the pair of Rogowski coils. Further, the relay may then, in response to the fault, trip a circuit breaker or other network protection device to address the fault.
39 Citations
61 Claims
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1. An electrical protection system comprising:
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a first Rogowski coil positioned to detect a first current and generate a first current measurement;
a second Rogowski coil positioned to detect a second current and generate a second current measurement, wherein a first protection zone is defined based on a positioning of the first Rogowski coil and the second Rogowski coil; and
a first protection device operable to determine from the first current measurement and the second current measurement, the existence of a first fault that is associated with a first circuit element within the first protection zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for protecting an electrical system, the method comprising:
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measuring a first current through a first conductor in an electrical system using a first Rogowski coil positioned along the first conductor;
outputting a first current signal corresponding to the first current;
measuring a second current through a second conductor in the electrical system using a second Rogowski coil positioned along the second conductor;
outputting a second current signal corresponding to the second current; and
providing the first current signal and the second current signal to a first protection device. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. An electrical protection system comprising:
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a first pair of Rogowski coils operable to generate a first pair of current signals, the first pair of current signals being associated with a first network unit of the electrical system;
a second pair of Rogowski coils operable to generate a second pair of current signals, the second pair of current signals being associated with a second network unit of the electrical system; and
a first protection device associated with the first network unit and operable to receive and process the first pair of current signals and the second pair of current signals. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61)
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Specification