Fast transfer test of power station auxiliaries
There has been much work done concerning the analytical and theoretical analysis of bus transfers, most of this pertaining to the induction motor during transients; however, very little has been published presenting experimental data of such a transfer. In this paper data is presented which was taken during and after a bus transfer on a 450 MW fossil fired unit. The data shows the validity of the models, but also indicates that the synchronous motor is more of a concern than previously thought.
Analytical Studies Of Voltage And Current Transients During Fast Bus Transfer In A.C. Auxiliary System Of Thermal Power Station
This paper presents a powerful approach to analyse the voltages and currents during auxiliary bus transfer. A generalized computer program using multi-motor modelling suitable for analysis of a number of motors connected on the unit bus has been developed. In the first part of the study, auxiliary bus voltage decay and phase angle, speed fall of various motors, motor residual voltage and current and bus frequency are investigated at discrete time interval of 0.001 second. In the second part of the study the in-rush currents in the individual motors at different instants of closing of the reserve bus are predicted. Also, the bus-voltage recovery characteristic i s obtained. A test case is also illustrated.
Representation of systems disturbed by wide band noise
In this paper, a method of handling and working with wide band noise is developed. We represent wide band noise as a distributed delay of white noise and use it to reduce a nonlinear system disturbed by wide band noise to a nonlinear system disturbed by white noise. An application of this reduction to a nonlinear filtering problem under a wide band noise disturbance is discussed.