The Development of Real-Time Harmonic Analysis Algorithm in Distribution Transformer

배전용 변압기의 실시간 고조파 분석 알고리즘 개발

  • Park, Chul-Woo (Kyungpook National University Medical device and robot institute of park)
  • 박철우 (경북대학교 융합의료기기로봇연구소)
  • Received : 2012.11.24
  • Accepted : 2013.02.14
  • Published : 2013.03.31


Recently harmonics flowing into power system is increasing as the usage of semiconductor equipments and switching mode power equipments are increasing. Harmonics cause problems such as heat increasing and reduction in capacity of transformers, especially the harmonics flowing into a distribution transformer can lead to the lifetime reduction of transformer. In this paper, we are about to develop a device that can monitor harmonics in real-time as it is affixed to a distribution transformer. Unlike the existing expensive harmonic analysis device, a new harmonic analysis algorithm is proposed in order to implement low-cost equipment. The real-time harmonic analysis algorithm proposed in this paper allows implementation on low performance microcontrollers, thus it can monitor the harmonic in real-time as it is individually affixed to the transformer. Therefore, it would improve the reliability of the transformer and stable power system operation would be possible as it can prevent the transformer accidents in advance.


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