Fault type identification method in electrical power system
AssigneeHitachi Energy Ltd
InventorsOD NAIDU, Yasir Ullah KHAN, Neethu GEORGE, Vedanta PRADHAN
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Abstract
The present disclosure relates to a method for controlling a protection system for an electrical power system comprising a transmission line, the method comprising: determining a plurality of phase angle deviations based on network models of the electrical power system during respective faults of at least three faults; determining at least three phase angle ranges based on the plurality of phase angle deviations, wherein a sum of the at least three phase angle ranges is an angle of complete rotation; and controlling the protection system for the electrical power system based on the at least three phase angle ranges.
Claims15
A method for controlling a protection system for an electrical power system comprising a transmission line, the method comprising:
- determining a plurality of phase angle deviations based on network models of the electrical power system during respective faults of at least three faults;
- determining at least three phase angle ranges based on the plurality of phase angle deviations, wherein a sum of the at least three phase angle ranges is an angle of complete rotation;
- and
- controlling the protection system for the electrical power system based on the at least three phase angle ranges.
A method for controlling a protection system for an electrical power system comprising a transmission line being terminated by a first terminal, the method comprising:
- determining a plurality of phase angle deviations based on network models of the electrical power system during respective faults of at least three faults;
- determining at least three phase angle ranges based on the plurality of phase angle deviations, wherein a sum of the at least three phase angle ranges is an angle of complete rotation;
- obtaining a plurality of voltage and current measurements of the first terminal;
- determining a measured phase-angle deviation based on the plurality of voltage measurements and a zero-sequence current based on the plurality of current measurements of the first terminal;
- determining a fault based on the at least three phase angle ranges, the measured phase-angle deviation, and the zero-sequence current;
- and
- controlling the protection system for the electrical power system based on the determined fault.
A device for controlling a protection system for an electrical power system comprising a transmission line, the device comprising a processor being configured to:
- determine a plurality of phase angle deviations based on network models of the electrical power system during respective faults of at least three faults;
- determine at least three phase angle ranges based on the plurality of phase angle deviations, wherein a sum of the at least three phase angle ranges is an angle of complete rotation;
- and
- control the protection system for the electrical power system based on the at least three phase angle ranges.
A device for controlling a protection system for an electrical power system comprising a transmission line, the device comprising a processor being configured to:
- determine a plurality of phase angle deviations based on network models of the electrical power system during respective faults of at least three faults;
- determine at least three phase angle ranges based on the plurality of phase angle deviations, wherein a sum of the at least three phase angle ranges is an angle of complete rotation;
- obtain a plurality of voltage and current measurements of the first terminal;
- determine a measured phase-angle deviation based on the plurality of voltage measurements and a zero-sequence current based on the plurality of current measurements of the first terminal;
- determine a fault based on the at least three phase angle ranges, the measured phase-angle deviation, and the zero-sequence current;
- and
- control the protection system for the electrical power system based on the determined fault.
Dependencies are inferred from the claim text.