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Trial Development of New Optical High Voltage Sensor Using Pockels Fiber Crystal

Research Project

Project/Area Number 09555085
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 電力工学・電気機器工学
Research InstitutionThe University of Tokyo

Principal Investigator

HIDAKA Kunihiko  The University of Tokyo, School of Engineering, Professor, 工学系研究科, 教授 (90181099)

Co-Investigator(Kenkyū-buntansha) MATSUOKA Shigeyasu  The University of Tokyo, School of Engineering, Research Associate, 工学系研究科, 助手 (10114646)
CHIBA Masakuni  The University of Tokyo, School of Engineering, Research Associate, 工学系研究科, 助手 (20011140)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥8,600,000 (Direct Cost: ¥8,600,000)
Fiscal Year 1998: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1997: ¥6,700,000 (Direct Cost: ¥6,700,000)
KeywordsFiber / Crystal / Pockels Effect / High Voltage / Measurement / Optical Method / Potentical Difference / Electric Field
Research Abstract

Measuring of the high voltages generally needs extra devices such as capacitive or resistive dividers in combination with voltage transformers. These conventional techniques have some limitation in frequency bandwidth, insulation and nonlinearity at the dynamic behavior.
In this research a new Pockels electro-optic sensor applied directly to measure high voltages without the aid of any additional voltage divider are developed. It uses a fiber Pockels crystal in a longitudinal modulation arrangement. Main results obtained are as follows :
1. A fiber Pockels crystal of Bi_4Ge_3O_<12>(BGO), which is 0.9 mm in diameter and 40 mm in length, has been grown. The sensor system consists of the fiber BGO crystal, He-Ne laser of 632.8nm as a light source, large core optical fibers in communication link, a PIN photodiode detector, and a high voltage SF_6 gas insulated vessel.
2. The measured half-wave voltage, which corresponds to the maximum measurable voltage of the sensor system, as 162 kV.Its value is 5 times lager than the theoretically predicted value. This characteristic is considered to be useful for measuring high voltages.
3. The performance of the sensor system was tested for dc, ac, lightning impulse and step waveform applied voltages up to 50 kV.
4. An oscillatory component in the range of hundreds kHz, which was observed in the tail part of the lightning impulse measurements using conventional Pockels sensors, is successfully eliminated with the present sensor system.
5. The sensor system responds to a fast step voltage of 3 ns in rising time which corresponds to a frequency bandwidth of 116 MHz. Finally, the experimental results show a flat frequency response of this sensor in a wide frequency range from dc to more than 100 MHz.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] J.C.Santos: "Optical High Voltage Measurement technique Using Pockels Devices" Jpn.J.Appl.Phys.,Part 1. 36・4. 2394-2398 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.C.Santos: "Optical High Voltage Sensors Using Pockels Fiber Crystals" Proc.10th Int. Symp. on High Voltage Engineering. 4. 475-478 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Hidaka: "The fiber crystal high voltage Pockels sensor" 平成9年電気学会全国大会. Vol.1. 88 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.C.Santos: "Multi-Segmented Pockels High-Voltage Measuring System" 電気学会誘電・絶縁材料研究会資料. DEI-97-46. 7-12 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.C.Santos: "Optical High Voltage Measurement Using Pockels Micro Single Crystal" Rev.Sci.Instrum.Vol.70(掲載予定). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.C.Santos and K.Hidaka: "Optical High Voltage Measurement Technique Using Pockels Devices" Jpn.J.Appl.Phys., Part 1. Vol.36, No.4. 2394-2398 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.C.Santos, M.C.Taplamacioglu and K.Hidaka: "Optical High Voltage Measurement Using Pockels Micro Single Crystal" Rev.Sci.Instrum.Vol.70 (to be published). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.C.Santos, M.C.Taplamacioglu and K.Hidaka: "Optical High Voltage Sensors Using Pockels Fiber Crystals" Proceedings of 10th International Symposium on High Voltage Engineering, Montreal, Canada. Vol.4. 475-478 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Hidaka, J.C.Santos and Yap N.W: "The fiber crystal high voltage Pockels sensor" IEEJ National Convention. No.70, Vol.1. 88 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.C.Santos, M.C.Taplamacioglu and K.Hidaka: "Multi-Segmented Pockels High-Voltage Measuring System" IEEJ Research Symposium on Dielectrics and Electrical Insulation. No.DEI-97-46. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.C.Santos: "Optical High Voltage Measurement Using Pockels Micro Single Crystal" Rev.Sci.Instrum.Vol.70(掲載予定). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] J.C.Santos: "Optical High Voltage Measurement Technique Using Pockels Devices" Jpn.J.Appl.Phys.Part1 36・4. 2394-2398 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] J.C.Santos: "Optical High Voltage Sensors Using Pockels Fiber Crystals" Proc.10th Int.Symp.on High Voltage Engineering. 4. 475-478 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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