2026-03-12T16:01:54Z https://miyazaki-mu.repo.nii.ac.jp/oai

oai:miyazaki-mu.repo.nii.ac.jp:00000741 2023-07-27T08:19:07Z 11:15

配電線路電流計測用光電流センサシステムの基礎研究 Fundamental Study on the Optical Current Sensor System of Mesaurement of Current for Power Distribution Systems 金子, 正光 カネコ, タダミツ KANEKO, Tadamitsu 本田, 親久 ホンダ, チカヒサ HONDA, Chikahisa 贄田, 寛 ニエダ, ヒロシ NIEDA, Hiroshi 上島, 征行 ウエジマ, マサユキ UEJIMA, Masayuki For the purpose of increasing supply reliability in power distribution systems, high reliable voltage and current sensors must be used. An optical current sensor based on the Faraday effect and an optical voltage sensor based on the Pockels effect have actively developed. They have such excellent features as eliminate electromagnetic interference in current or voltage measurement in spite of the smaller size than conventional current transformer or potential transformer and by applying optical fibers to the transmission line from optical current or voltage sensors to signal processing units. The authors have already reported the some characteristics of the two kinds of fiber-optic sensors for current and voltage measurements adaptable to the power distributions systems by using bulk Bi12GeO20(BGO) crystal as a Faraday or Pockels device. In this work, by using a thin R3Fe5O12(RIG) crystal and a bulk BGO crystal as Faraday devices, the characteristics of the optical current sensors for power distribution systems were investigated by applying AC 60 Hz current to the five kinds of insulated wires (ACSR-OE･OC) with 25, 58, 120, 200, 400 mm2 in nominal cross section, respectively. Then, the current was changed over a range from 1A to 550A at room temperature. As a result, it was found that when the RIG sensor without a ring core was used as a sensor, the currents in insulted wires cold be measured with accuracy bettte than three percent over a range from 1A to 550A. Also, it was found that when the BGO sensor with a ring core was used as a sensor, the larger currents than 10A could be measured with an accuracy better than five percent, but the currents of less than 10A could't be measured with an allowable accuracy. 1995-03-20 jpn departmental bulletin paper https://miyazaki-mu.repo.nii.ac.jp/records/741 AN10457429 宮崎公立大学人文学部紀要 Bulletin of Miyazaki Municipal University Faculty of Humanities 2 1 85 95 https://miyazaki-mu.repo.nii.ac.jp/record/741/files/2(1)_010_Kaneko.pdf application/pdf 821.8 kB 2014-04-01