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.
A Simplified Procedure for Determining the Auxiliary Bus Voltage and Angle During Bus Transfer
During a power station auxiliary bus transfer the bus residual voltage and angle relative to the reserve bus voltage are critical for the first .5 second. A procedure is presented that determines the auxiliary bus voltage during the critical period of the bus transfer. For this simplified procedure a gas fired steam turbine generator auxiliary system is the test case used. The procedure is equally applicable to a nuclear steam turbine generator auxiliary system. The effect of residual motor current is reviewed. Motor speed may also be determined with reasonable accuracy.
Fungal Biotransformations in Pharmaceutical Sciences
The regio- and stereoselective conversion of complex substrates represents one of the major advantage of microbial biotransformation. This chapter covers the biocatalytic capacities of fungi to derivatize bioactive small molecules, both from natural sources and from synthetic compounds. We focus particularly on sterol and taxane biotransformation. We also present examples at the interface of biotransformation and pathway engineering using recombinant organisms, with an emphasis on the production of lovastatin derivatives. Finally, we highlight selected studies on fungal xenometabolism which serves as a model to study the breakdown of drugs in mammals.