Design And Research On 135MW Air-Cooled Turbo-Generator Exciter

Exciation system is an important part of synchronous generator, it affects the operating characteristics of generator directly. Excitation system is make up of twon parts:one part is excitation power unit that supply DC power for excitation coil ;another is control part that auto-adjust DC power to meet generator running .According to power unit' s difference, synchronization generator excitation system includes DC generator excitation , brusherless excitation and stillness controlled silicon, brusherless excitation technology advantage :1) excitation electric current is limited for collected ring and brush, so be more fit for big capacity turbo-generator;2)for no sparkle,be fit for anti-explodning and anti-fire special environment .Along with semiconductor industry' s development, brusherless excitation generator was kept in the foreground. In this paper , taked example for WBT95+WPE35 generator , introduced brusherless excitation generator' design and manufacture .1)WBT95 brusherless exciterBrusherless exciter is a AC generator that rotor is armature , AC converted into DC by rectifier , DC is input for rotor coil. For minishing excitation generator inherence time constant .usually increasing generator frequency, .WBT95 is 200Hz. Other , in order to minish excitation generator dynamic time constant, and auto-adjust system set feedback for magnetic field current.2)WPE35 permanent magnet excitation generatorPermanent magnet exciter was not only replacing brush exciter , but also replacing trend of AL-NI series exciter.3)rotating rectifier setRectifier set is a key that is brusherless excitation generator, manny rectifier . fuse capacitor etc are fixed on the hightspeed circumrotation and limited disc. The following technology point must be settle by all kind of circumrotation rectifier set must settle, especially big capacity , high voltage, big current generator.WBT95+WPE35 is a latent pole rotating rectifier brushless exciter, is a big exciter in my factory now, conld be fit for all kind of 100 — 200MW generator. It is quite high level of standardization , supply a domestic gap.Furthermore, study mainly focus on research and discussion of three...