| Project/Area Number |
10650283
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | SAGA UNIVERSITY |
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Principal Investigator |
FURUKAWA Tatsuya Saga University, Faculty of Science and Engineering, Associate Professor, 理工学部, 助教授 (90173525)
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| Co-Investigator(Kenkyū-buntansha) |
OHCHI Masashi Saga University, Faculty of Science and Engineering, Professor, 理工学部, 助手 (30233018)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Induction Sensor / Voltage-Current Sensor / Electromagnetic Analysis / Phase shift / Power Distribution / Ground Wire / Sensor in Insulator / Test Sensor / 電流電圧センサ内蔵がいし / 配電系力率計測 / 電圧センサ / 電流センサ / 碍子内蔵センサ / 電圧電流センサ内蔵碍子 / 非接触計測 / 有限要素解析 |
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| Research Abstract |
The precise estimation of the electric power at the consumer end-side is eagerly demanded for the maintenance, control and the stable voltage regulation by electric power companies. There are several approaches to the observation of the power factor based on the practical waveform of both the voltage and the current. However, conventionally each sensor has been installed on power distribution lines independently. The measurement systems will be large and complicated to result in no maintenance free systems.
To carry out the waveform observation for power factor, we have devised and proposed an insulator built-in type of voltage-current sensor. According to our previous investigations on the sensor, it was found out theoretically that a serious phase shift in the measured waveforms of the voltage and the current might occur owing to the electromagnetic interference of each phase.
In this project, we have investigated the cause of phase shift in the voltage and current sensors through the finite element analyses on the single phase power distribution system, the horizontal and vertical three-phase power distribution systems. To compensate the phase shift in the current sensor, we have introduced the new current sensor coils, that are connected with opposite polarity to each other so that the sensor installed on each phase distribution line will measure only the flux linkage across its phase line and cancel the flux linkage due to other phase currents.
Finally, based on the theoretical design, the prototype of the voltage-current sensor embedded in an insulator with above two coils has been fabricated in the insulator company and it has been found out experimentally that the effect of compensation on the phase shift in the current sensor could be obtainable in the simulated three-phase power distribution system.
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