Study On The Distributed Busbar Protection

This paper analyzes detailedly the principles on distributed busbar protection -current instantaneous value differential method, impedance method, and put forward the new method of current fault component phase method, then compares with these methods. In order to solve the existing CT saturation problem which is met in current differential principle, this paper bring forward the new method to discriminate CT's saturation based on Bd wavelet transformation. Meanwhile various numerical simulations with Electromagnetic Transients Analysis Program (ATP/EMTP) are madeand the results are analyzed. Finally, this paper put forward software scheme on otherprotections matched with distributed busbar protection. Thus, we can make a whole new-style distributed busbar protection scheme.