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Transformer through-fault current monitor 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H02H-007/04
출원번호 US-0247911 (2008-10-08)
등록번호 US8031447 (2011-09-19)
발명자 / 주소
  • Guzman-Casillas, Armando
  • Fischer, Normann
출원인 / 주소
  • Schweitzer Engineering Laboratories, Inc.
대리인 / 주소
    Eugene M., Cummings, PC
인용정보 피인용 횟수 : 0  인용 특허 : 33

초록

A device is provided for monitoring through-fault current in an electric transformer on an electrical power system. The device generally includes a magnitude calculator for calculating the magnitude of current (e.g., a root means square value of current or magnitude of a fundamental of current) base

대표청구항

We claim: 1. A device for monitoring through-fault current in an electric transformer on an electrical power system, the electric transformer having a signal waveform therethrough, the device including:a magnitude calculator adapted to calculate a magnitude value of current from the signal waveform

이 특허에 인용된 특허 (33)

  1. Yang Lifeng, Adaptive quadrilateral characteristic distance relay.
  2. Guzman Casillas,Armando; Fischer,Normann, Apparatus and method for detecting the loss of a current transformer connection coupling a current differential relay to an element of a power system.
  3. Thompson,Michael J., Apparatus and method for providing differential protection for a phase angle regulating transformer in a power system.
  4. Schweitzer ; III Edmund O. (Pullman WA) Roberts Jeffrey B. (Moscow ID), Detection of transformer high side fuse operations in a power transmission system.
  5. Schiel Ludwig,DEX, Differential current protection for a transformer.
  6. Bastard Patrick,FRX ; Regal Hugues,FRX, Differential protection device of a power transformer.
  7. Andow Fumio (Hachioji JPX) Suga Noriyoshi (Tama JPX), Digital calculation type differential relay.
  8. Roberts, Jeffrey B.; Tziouvaras, Demetrios, Fault type selection system for identifying faults in an electric power system.
  9. Hankins William G. (Issaquah WA), Flue gas conditioning system for intermittently energized precipitation.
  10. Roberts, Jeffrey B., Line differential protection system for a power transmission line.
  11. Roberts, Jeffrey B.; Benmouyal, Gabriel; Altuve-Ferrer, Hector; Folkers, Ralph; Tziouvaras, Demetrios, Line differential protection system for a power transmission line.
  12. Ara Kulidjian CA; Bogdan Kasztenny CA, Magnetizing inrush restraint method and relay for protection of power transformers.
  13. Premerlani William James, Method and apparatus for transmission line phase angle comparisons.
  14. Elston, Joel A. B., Methods and apparatus for differential current measurement in a three-phase power system.
  15. Roberts Jeffrey B. ; Benmouyal Gabriel,CAX ; Tziouvaras Demetrios,CAX, Multi-ended fault location system.
  16. Wilkerson Timothy M. (Highland IL) Harden Sidney B. (St. Louis MO) Freeman Richard A. (St. Louis MO), Overcurrent protection relay with communications.
  17. Crawford Tullus E. (Knoxville TN) Riley ; Jr. Claude R. (Knoxville TN), Portable tester and related method for determining the primary winding to secondary winding current ratio of an in-servi.
  18. Wilson Gerald L. (29 Highgate Rd. Wayland MA 01778) Otten David M. (50 Playstead Rd. Newton MA 02166), Power angle relay to measure and respond to the power angle of a synchronous generator.
  19. Schweitzer ; III Edmund O. ; Roberts Jeffrey B., Protection quality capability for protective relays used in an electric power system.
  20. Schweitzer, III,Edmund O.; Lee,Tony J., Protective relay capable of protection applications without protection settings.
  21. Udren Eric A. (Monroeville PA), Protective relay methods and apparatus.
  22. Udren Eric A. (Monroeville Boro PA), Protective relaying apparatus for providing fault-resistance correction.
  23. Schweitzer ; III Edmund O. (Whitman County WA), Relay for detecting a current disturbance and asserting an output.
  24. Armando Guzman-Casillas, Restraint-type differential relay.
  25. Guzman-Casillas Armando ; Anderson Luther S., Restricted earth fault protection for transformers using a directional element.
  26. Zocholl Stanley E. (Holland PA), Solid state transformer differential relay.
  27. Roberts Jeffrey B. (Moscow ID) Hou Daqing (Pullman WA), System for detection of transients from a coupling capacitor voltage transformer used in a protective relay.
  28. Armando Guzman-Casillas ; Hector Altuve-Ferrer MX; Stanley E. Zocholl ; Gabriel Benmouyal CA, System for power transformer differential protection.
  29. Bai-Lin Qin ; Armando Guzman-Casillas, System for protection zone selection in microprocessor-based relays in an electric power system.
  30. Slade, Walter R.; Frankenberg, Scott James; McCandless, Donald A.; Hickman, Christopher W., System, method, field unit, reference unit and computer program product for phase tracking of electrical conductors.
  31. Lof, Per-Anders Kristian; Gertmar, Lars Gustaf Ingolf, System, method, rotating machine and computer program product for enhancing electric power produced by renewable facilities.
  32. Schucht Donald M. (Hadlyme CT), Three-phase transformer testing method and system.
  33. Wilkerson Timothy M. (Highland IL), Transformer differential relay.
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