DOI QR코드

DOI QR Code

과전류 경고 회로용 변류기의 자기포화 특성을 고려한 최적 설계

Optimal Design considering Magnetic Saturation Characteristic of Current Transformers for the Overcurrent Warning Circuit

  • 투고 : 2015.06.22
  • 심사 : 2015.07.23
  • 발행 : 2015.07.31

초록

본 논문은 과전류 경고회로의 신호를 나타내는 변류기를 설계하기 위해 관통형 변류기의 특성을 분석하고 손실을 고려한 최적 설계를 수행하였다. 관통형 변류기 코어의 크기는 2차측의 코일 턴수에 따라 결정된다. 우리는 코어에 코일을 감는 턴수에 따라 다르게 나타나는 전류 파형을 분석하였으며, 변류기 코어의 자속포화에 의한 비정현적인 파형을 개선하고자 2차측 코일 턴수와 부하저항과의 관계를 확인하였다. 또 코어의 외경은 유지하면서 내경 및 적층을 변화시켜 정밀도 개선 및 최적설계를 하였고, 이를 통하여 과전류 경고회로의 동작에 필요한 전류 값을 도출하였다.

In this paper, we analyzed characteristic of window type current transformer and we performed the optimal design consider to the loss; in order to design the current transformer figured signal of overcurrent warning circuit. The core size of window type current transformer was determined by the secondary coil turns. We analyzed current waveform, which is appeared by the number of coil turns on the core, we made sure the relation of secondary coil turns and load resistance in order to improve the non-sinusoidal wave by the flux saturation of the current transformer core. Additionally, we did improvement of the accuracy and optimal design through the transformation of the inner diameter and the stack length when the outer diameter of core is sustaining.

키워드

참고문헌

  1. G. Park, and S. Park, "A study on the cause Analysis and solution of an overheated NGR of the Main Transformer," J. of the Korea Institute of Electronic Communication Sciences, vol. 6, no. 2, 2011, pp. 262-267.
  2. Y. Han, and D. Kim, "The Development of Android Application for Intelligent Concent," J. of the Korea Institute of Electronic Communication Sciences, vol. 8, no. 10, 2013, pp. 1515-1521. https://doi.org/10.13067/JKIECS.2013.8.10.1515
  3. M. Jeon, "A Differential Colpitts-VCO Circuit Suitable for Sub-1V Low Phase Noise Operation," J. of the Korea Institute of Electronic Communication Sciences, vol. 6, no. 1, 2011, pp. 7-12.
  4. H. Shin, "Design of LED Driving SMPS for Large Traffic Signal Lamp," J. of the Korea Institute of Electronic Communication Sciences, vol. 4, no. 2, 2009, pp. 123-129.
  5. Y. Kang, T. Zheng, H. Kang, B. Lee, and Y. Kim, "Development of a Compensating Algorithm for an Iron-cored Measurement CT using Flux-magnetizing Current Curves and Voltage-core Loss Current Curves," The Trans. of the Korean Institute of Electrical Engineers, vol. 58, no. 10, 2009, pp. 1849-1854.
  6. Y. Kang, J. Yun, and S. Ok, "A Percentage Differential Current Relaying Algorithm for Bus Protection Using Current Transformer Saturation Detecting Algorithm," The Trans. of the Korean Institute of Electrical Engineers, vol. 2001, no. 11, 2001, pp. 115-117.
  7. Y. Park, and S. Jang. "A Study on an Electronically Compensated Current Transformer for a Precision Power Transducer," The Trans. of the Korean Institute of Electrical Engineers, vol. 44, no. 7, 1995, pp. 948-953.
  8. Y. Eum, C. Koh, S. Hong, and P. Shin. "Experimental Measurement of Magnetic Properties of a Toroidal-type Bulk Electrical Steel using B-waveform Control," The Trans. of the Korean Institute of Electrical Engineers, vol. 56, no. 5, 2007, pp. 869-875.
  9. J. Lee, S. Kang, S. Lee, Y. Kang, J. Bae, J. Ahn, C. Lee, and J. Lee. "A Design Method of Iron-cored CTs To Prevent Saturation," The Trans. of the Korean Institute of Electrical Engineers, vol. 48, no. 2, 1999, pp. 119-126.