Development Of Frequency Conversive Dephasing Rectifier Transformer

The frequency conversive dephasing rectifier transformer will have a broad application prospects and market value in our country, the multi-pulse wave rectifier has gotten the affirmation of the market and become more and more popular in the group of rectifier transformers manufactured by foreign and domestic famous enterprises.Management of inevitable harmonic form power system becomes the key technical problem. There are two main methods for harmonic governance: one is the filter; The second is to control the harmonic from the source and the most effective way to govern harmonic from the source is to use multi-pulse rectifier transformer system. As we all know, the more pulse wave number in power supply system, the higher energy utilization ratio, the higher power factor of the system, and the higher operation efficiency. So the wide us of the 12 pulse wave, 24 pulse wave, 36 pulse wave, 48 pulse wave or even higher pulse wave rectifier transformer system become inevitable. This paper describes the 24 pulse wave frequency conversive dephasing rectifier transformer as the typical representative, from the working principle to the structure design and the Electromagnetic calculation.1. Grasping the working principle of rectifier circuit is one of the most important link in developing rectifying device, also is the necessary condition to design rectifier transformer well.2. The development of frequency conversive dephasing rectifier transformer should include two stages, first is electromagnetic calculation, and then is the structure design and production drawings.3. Make sure the device is composed of two frequency conversive dephase rectifier transformer: the two transformers’ network side are in extend-triangle connection, with + 7.5 ° and-7.5 ° phase angle shift respectively, windings on valve side adopt d, y connection and the line voltage phasors have 15 ° phase angle difference. They are in parallel operation after full-wave rectifier and composing of 24 pulse wave rectifier system. This kind of transformer has the following three advantages: staggered winding arrangement on valve side, overcoming the unequal semi-cross impedance problem in the transformer with split windings; With tapping lead in main winding and phase-shifting winding, the voltage relationship between network side and valve side are more accurate; phase-shifting is conducted through the extend-triangle, which is convenient and simple, reduce the voltage regulating coefficient, and also reduce the pollution to the grid.The design scheme of this frequency conversive dephasing rectifier transformer is in line with practical application, and can bring large economic benefits to transformer manufacturers.