A Study of Ripple Harmonics in the Traction Power Systems

• Main Authors: Kuang-Chieh Lin, 林廣傑
• Other Authors: 蕭瑛東
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/69071798390738691373

博士 === 淡江大學 === 電機工程學系博士班 === 97 === The harmonic detection for the alternating current system is performed by the fixed current and voltage ratio transformers as well as transducers. There are many literatures about the harmonics of the AC systems with innumerable results. As to the ripple harmonics in the direct current system, there are few investigations on the ripple harmonic except the ripple amplitude with its corresponding response time. This work present a novel technique and analysis method that can be utilized under various operating conditions. This study presents a new measurement method with a search probe to detect the magnetic field on the rails of the mass rapid transit systems for predicting the harmonics of the ripple in the DC traction power systems. This work measures the signals and harmonics on the DC link of the traction power of the Taipei Mass Rapid Transit System under the static and dynamic status as a train running the rail road. This study proposes a novel device named the search probe that can precisely analyze the ripple harmonic in the DC traction power and eliminate the noise and electromagnetic interference on the measurement data. The field measurement results demonstrate the adaptability of the presented search probe. The harmonics in the DC ripple signals can be appied to analyze the characteristics and compatibility with the signals in the railway.