Method of controlled switching for transformers using transformer residual flux
AssigneeSchweitzer Engineering Laboratories, Inc.
InventorsGabriel Benmouyal, Ritwik Chowdhury
Life of this patent
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Abstract
An intelligent electronic device (IED) may obtain a voltage measurement matrix based on an arrangement of a transformer in a power system. The IED may obtain a delta connection compensating angle based on the location of the circuit breaker and the transformer arrangement. The IED may obtain voltage measurements of the transformer. The IED may determine a residual flux value of the transformer based at least in part on the voltage measurements, the voltage measurement matrix and the delta connection compensating angle. The IED may send a signal to a circuit breaker of the transformer to connect the transformer to the power system based at least in part on the system voltage and residual flux value.
Claims20
An intelligent electronic device (IED), comprising:
- a memory;
- and
- a processor operatively coupled to the memory, wherein the processor is configured to execute instructions stored on the memory to cause operations comprising:
- determining a voltage measurement matrix based on an arrangement of a transformer in a power system;
- obtaining voltage measurements of the transformer;
- determining a residual flux value of the transformer based at least in part on the voltage measurements and the voltage measurement matrix;
- and
- sending a signal to a circuit breaker of the transformer to connect the transformer to the power system based at least in part on the residual flux value and system voltage magnitude prior to closing the circuit breaker.
A non-transitory, computer readable medium, comprising instructions configured to be executed by a processor to cause operations comprising:
- determining a voltage measurement matrix based on an arrangement of a transformer in a power system;
- obtaining a delta connection compensating angle based on the breaker location, transformer winding configuration connected to the breaker and the system phase rotation
- obtaining voltage measurements of the transformer;
- determining a residual flux value of the transformer based at least in part on the voltage measurements, the voltage measurement matrix, and the delta connection compensating angle;
- and
- sending a signal to a circuit breaker of the transformer to connect the transformer to the power system based at least in part on system voltage and the residual flux value.
A method performed by an intelligent electronic device, (IED), comprising:
- determining a voltage measurement matrix based on an arrangement of a transformer in a power system;
- obtaining voltage measurements of the transformer;
- determining a residual flux value of the transformer based at least in part on the voltage measurements and the voltage measurement matrix;
- and
- sending a signal to a circuit breaker of the transformer to connect the transformer to the power system at a time based at least in part on the residual flux value.
Dependencies are inferred from the claim text.