A Multi-Purpose Balanced Transformer with Harmonic Eliminating Capability for Railway Traction Applications

作者：Zhang Zhiwen^*; Wu Bin; Luo Longfu; Zhou Lawu; Liu Fusheng

来源：General Meeting of the IEEE-Power-and-Energy-Society, 2008-07-20 to 2008-07-24.

• Balanced transformers
• Harmonic filters
• Reactive power compensation
• Traction drives
• Railway substations

A multi-purpose balanced (MPB) transformer is proposed in this paper for electric railway applications. The MPB transformer is developed from impedance-matching (IM) transformers widely used in China's railway systems. The proposed MPB transformer has three main functions: 1) it provides a symmetrical two-phase voltage of 27.5kV for railway overhead lines to power electric trains, 2) It supplies a three-phase balanced voltage of 10.5kV for railway substations, and 3) it can accommodate a three-phase harmonic filter with improved power factor and reduced manufacturing cost. In this paper, the operating principles of the MPB transformer are elaborated, the design of the harmonic filters is discussed, and the results of computer simulations are provided. A 16MVA MPB transformer was designed and commissioned, and real-time field measurements are provided.

• 出版日期2008
• 单位湖南大学