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3상 4선식 전력계통에서 전압제어 방식의 역률보상시스템

Power Factor Compensation System based on Voltage-controlled Method for 3-phase 4-wire Power System

  • 박철우 (경북대학교 의료로봇연구소) ;
  • 이현우 (경북대학교 의료로봇연구소) ;
  • 박영균 (경북대학교 의료로봇연구소) ;
  • 정상현 (경북대학교 의료로봇연구소)
  • Park, Chul-woo (Kyungpook National University Medical Device and Robot Institute of Park) ;
  • Lee, Hyun-woo (Kyungpook National University Medical Device and Robot Institute of Park) ;
  • Park, Young-kyun (Kyungpook National University Medical Device and Robot Institute of Park) ;
  • Joung, Sanghyun (Kyungpook National University Medical Device and Robot Institute of Park)
  • 투고 : 2017.04.29
  • 심사 : 2017.07.27
  • 발행 : 2017.08.25

초록

본 논문에서는 3상 4선식 전력계통에서 새로운 전압제어 방식의 역률보상시스템을 제안한다. 제안하는 전압제어 방식의 역률보상시스템은 슬라이닥을 이용하여 가변되는 출력전압을 커패시터에 인가하는 것으로 보상에 필요한 무효전력을 생성한다. 기존의 커패시터 뱅크 방법을 이용하는 역률보상시스템은 선택 가능한 커패시터 용량이 한정되어 있어 부하 상황에 따라 역률보상 오차가 발생하지만, 제안 시스템은 변화하는 부하를 추종하여 오차 없이 역률을 100%까지 보상할 수 있다. 본 논문에서는 3상 4선식 전력계통에서 전압제어 방식의 역률보상시스템과 제어 알고리즘을 개발하였고 모의실험과 실험을 통해 성능을 확인한다. 제안 시스템을 수용가에 설치할 경우 역률 개선을 통한 전기료 감소, 선로손실 감소, 부하 용량 증대 효과가 기대된다. 특히 발전 사업가 측에서는 역률 보상 성능의 향상으로 송전 여유 용량 확보와 발전량 절감이 가능하다.

In this paper, a novel power factor compensation system based on voltage-controlled method is proposed for 3-phase 4-wire power system. The proposed voltage-controlled power factor compensation system generates a reactive power required for compensation by applying a variable output voltage by a slidac to a capacitor. In conventional power factor compensation system using the capacitor bank method, the power factor compensation error occurs depending on the load condition due to the limited capacity of the capacitors. However, the proposed system compensates the power factor up to 100% without error. In this paper, we have developed a voltage-controlled power factor compensation system and a control algorithm for 3-phase 4-wire power system, and verify its performance through simulation and experiments. If the proposed power factor compensation system is applied to an industrial field, a power factor compensation performance can be maximized. As a result, it is possible to reduce of electricity prices, reduce of line loss, increase of load capacity, ensure the transmission margin capacity, and reduce the amount of power generation.

키워드

참고문헌

  1. Hyun-woo Lee, Young-kyun Park, Jinhan Lee, Sanghyun Joung and Chul-woo Park, "Development of advanced Power Factor Computation Algorithm in Harmonics distorted Distribution System," Journal of the Institute of Electronics and Information Engineers, vol. 53, no. 7, pp.121-127, 2016. https://doi.org/10.5573/ieie.2016.53.7.121
  2. Jun-sung Lee, "An Integrated Circuit design for Power Factor Correction," Journal of the Institute of Electronics and Information Engineers, vol. 51, no. 5, pp. 219-225, 2014. https://doi.org/10.5573/IEIE.2014.51.5.219
  3. Etienne Moulin, "Measuring reactive power in energy meters," Metering international-Issue, pp. 52-54, 2002.
  4. Samet H., "Employing stochastic models for prediction of arc furnace reactive power to improve compensator performance," IET generation, transmission & distribution, vol. 2, no. 4, pp. 505-515, 2008. https://doi.org/10.1049/iet-gtd:20070320
  5. KEPCO, Basic Terms of Service, KEPCO, pp. 38-40, 2016.
  6. Hyun-Woo Lee, In-Soo Lee, Jinhan Lee, Young Kyun Park, Sanghyun Joung and Chulwoo Park, "Development of Power Factor Computation Algorithm Robust to Frequency Variation," The Journal of Korean Institute of Information Technology, vol. 14, no. 7, pp. 29-37, 2016.
  7. Yun Gwang Hee and Heejin Lee, "A Study on Development of SVC to Improve Harmonics and Power Factor of Power Plant," Journal of Electrical Engineering & Technology, vol. 60, no. 11, pp. 2109-2118, 2011.
  8. Jong Gyeum Kim, "Analysis for Thermal Distribution of Low-voltage Condenser by the Variance of Voltage & Frequency," Journal of the Korean Institute of illuminating and Electrical Installation Engineers, vol. 24, no. 4, pp. 43-49, 2010.
  9. Thomas M. Blooming, "Capacitor Application Issues," IEEE Trans on IAS, pp. 1013-1026, 2008.
  10. Chul-woo Park, "Development of voltage controlled power factor compensation system using slidac," Journal of the Institute of Electronics and Information Engineers, in press.
  11. Paul. C. Krause and Oleq Wasynczuk, Electro mechanical Motion Devices, McGraw-Hill, 1998.