Directional overcurrent monitoring in substation transformers
AssigneeOneSubsea IP UK Limited
InventorsAudun Magne Askeland, Kristiansen Baricuatro
Life of this patent
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Abstract
The present disclosure provides techniques and apparatus for fault monitoring for a substation transformer. An example substation includes a transformer coupled to a plurality of generators, and a monitoring circuit. The transformer includes a core and a monitoring winding disposed on the core. The monitoring circuit is coupled to the monitoring winding. The monitoring circuit is configured to measure a first single-phase voltage of the transformer via the first monitoring winding. The monitoring circuit is also configured to monitor for one or more faults that affect the substation based at least in part on the first single-phase voltage.
Claims18
A substation comprising:
- a transformer coupled to a plurality of generators and comprising:
- a core comprising a plurality of yoke segments and a plurality of core legs;
- a first set of windings disposed around a first core leg of the plurality of core legs, the first set of windings being coupled to a first single-phase power supply;
- and
- a first monitoring winding disposed on the core and around a first yoke segment of the plurality of yoke segments, the first monitoring winding being inductively coupled to the first set of windings;
- and
- a monitoring circuit coupled to the first monitoring winding and configured to:
- measure a first single-phase voltage of the transformer via the first monitoring winding;
- and
- monitor for one or more faults that affect the substation based at least in part on the first single-phase voltage.
A system comprising:
- a plurality of generators;
- and
- a substation coupled to the plurality of generators and comprising:
- a transformer comprising:
- a core;
- and
- a first monitoring winding disposed on the core;
- and
- a monitoring circuit coupled to the first monitoring winding and comprising a plurality of current transformers, the monitoring circuit configured to:
- measure a first single-phase voltage of the transformer via the first monitoring winding;
- measure a respective single-phase current within the transformer via a respective current transformer of the plurality of current transformers;
- and
- monitor for one or more faults within the system based at least in part on the first single-phase voltage and the measured single-phase currents.
A substation comprising:
- a transformer coupled to a plurality of generators and comprising:
- a core comprising a plurality of core legs;
- and
- a first monitoring winding disposed on the core and around a single core leg of the plurality of core legs;
- and
- a monitoring circuit coupled to the first monitoring winding and configured to:
- measure a first single-phase voltage of the transformer via the first monitoring winding;
- and
- monitor for one or more faults that affect the substation based at least in part on the first single-phase voltage.
Dependencies are inferred from the claim text.