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Compensation of simple fiber optic Faraday effect sensors

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G08B-021/00
  • H04W-004/14
  • G01R-033/032
  • G01R-015/24
  • G01R-019/25
  • G01R-031/02
  • H04L-029/08
  • G01R-001/00
출원번호 US-0586675 (2014-12-30)
등록번호 US-9247402 (2016-01-26)
발명자 / 주소
  • Bjorn, Lars N.
출원인 / 주소
  • POWERSENSE A/S
대리인 / 주소
    Klein, O'Neill & Singh, LLP
인용정보 피인용 횟수 : 0  인용 특허 : 29

초록

A monitoring system for detecting earth faults in an electrical power supply grid providing a power signal includes a plurality of monitoring devices, each of the monitoring devices including a detector for detecting the level of harmonics in the power signal, wherein the level of harmonics is detec

대표청구항

1. A method of communicating between a master unit and a plurality of monitoring units monitoring an electrical power supply grid, said master unit comprising a communication unit connected to a wired or wireless network for communicating with said plurality of monitoring units, each of said monitor

이 특허에 인용된 특허 (29)

  1. Wallis Lee D. (both Murfreesboro TN) Kennedy Robert A. (both Murfreesboro TN), Apparatus and method for detecting a fault in a distributed line network.
  2. Bj첩rn,Lars N., Compensation of simple fibre optic Faraday effect sensors.
  3. Bj��rn,Lars N��rgaard, Compensation of simple fibre optic Faraday effect sensors.
  4. Ishiko Daisuke (Hirakata JPX) Toda Kazurou (Hirakata JPX) Kamada Osamu (Ikoma JPX) Miura Akihiro (Akashi JPX), Current and/or voltage detector for a distribution system.
  5. Atwater Philip L. (Golden CO) Jacobs Malin L. (Littleton CO), Directional harmonic overcurrent relay device.
  6. Miller Robert C. (Penn Hills Township ; Allegheny County PA) Asars Juris A. (Murrysville Boro PA), Drift compensation technique for a magneto-optic current sensor.
  7. Morron Ricardo,ESX ; Moreno David,ESX ; Planas Pere,ESX, Earth leakage protective relay.
  8. Cruden Andrew J. (Lennoxtown GB6) McDonald James R. (Newton Mearns GB6) Andonovic Ivan (Bearsden GB6) Allan Kenneth (Erskine GB6) Porrelli Raymond A. (East Kilbride GB6), Electric current measurement.
  9. Ulmer ; Jr. Edward A. (Clearwater FL), Electric current sensor using the faraday effect.
  10. Fielden John S. (Devon GB2) James Andrew L. (Winchester GB2) McCabe Barnaby J. (Redland GB2), Electricity meters using current transformers.
  11. Asars, Juris A., Electronic circuitry with self-calibrating feedback for use with an optical current sensor.
  12. Lutz Dale R. (St. Paul MN) Olson Grieg A. (St. Paul MN) Forsberg Gary B. (St. Paul MN), Faraday effect current sensor having two polarizing fibers at an acute angle.
  13. Sahashi, Teruhisa; Nakada, Hidenori; Kawai, Hirotaka; Kojima, Isao; Tokumasu, Tsugio, Farady rotation device and optical device comprising it.
  14. Dunk Michael P. (Racine WI) Rector Gary D. (Muskego WI) Banting John F. (Waukesha WI), Faulted circuit detector having an isolated indicator for an electrical transformer.
  15. Freeman Mark R. (Yorktown Heights NY), Fiber optic probe with a magneto-optic film on an end surface for detecting a current in an integrated circuit.
  16. Kajiwara Yoshihiro,JPX ; Aishima Takeru,JPX, Harmonics survey system.
  17. Gu Wen-Jian (Croton-on-Hudson NY) DiVincenzo Gregory T. (Easton MD) Caldeira Paulo P. (Scarsdale NY), Isolated current sensor for DC to high frequency applications.
  18. Doerfler Ronald W. (Rockford IL) Power Terrill G. (Rockford IL) Jones Stephen R. (Rockford IL) Owens William R. (Rockford IL), Magneto-optic current sensor.
  19. Lanagan, Michael T.; Valsko-Vlasov, Vitalii K.; Fisher, Brandon L.; Welp, Ulrich, Magneto-optic current sensor.
  20. Feldtkeller Ernst (Munich DT), Magneto-optical measuring transducer for very high currents/voltages.
  21. Bosselmann Thomas,DEX ; Menke Peter,DEX ; Niewisch Joachim,DEX, Method and device for measuring an electrical alternating quanity with temperature compensation.
  22. Menke Peter,DEX ; Bosselmann Thomas,DEX, Method for temperature calibration of an optical magnetic field measurement array and measurement array calibrated by the method.
  23. Dupraz Jean-Pierre (Aix les Bains FRX), Method of updating the scale factor of apparatus for measuring an alternating electric current by means of the faraday e.
  24. Elston, Joel A. B., Methods and apparatus for differential current measurement in a three-phase power system.
  25. Tatsuno Kyoichi (Yamato JPX) Umeda Toshiya (Tokyo JPX), Optical fiber sensor having function of compensating for all drifting components.
  26. Okada Kenichi (Tokyo JPX), Optical interferometric angular rate meter with a self-diagnostic capability.
  27. Miller Robert C. (Salem Township ; Westmoreland County PA) Asars Juris A. (Murrysville PA), Optical measurement using polarized and unpolarized light.
  28. Unsworth, Joseph, Partial discharge monitoring system for transformers.
  29. Duncan, Paul Grems; Schroeder, John Alan, Sensor for optically measuring magnetic fields.
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