By M.-J. Chen, M. Buamud, D. M. Grant (auth.)
The contents of this ebook are meant for these considering the simulation of the functionality of new release platforms. the topic is of significance to practicing electric engineers as a result many occasions that come up within the layout and operation of modem electromechanical structures and electricity structures. The simulation courses contained during this publication disguise the prediction of generator functionality for either huge and small scale devices. Synchronous turbines of the around rotor and salient-pole number of scores of among a number of Megawatts to round 1200 MW are continually utilized by public provide businesses for the iteration of electric strength. For business reasons numerous sorts of generator are used, together with steam and gasoline generators, and medium to low velocity diesel engine pushed turbines, the previous for these situations the place technique steam is on the market and the latter usually within the function of marine iteration or in a standby role.
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Extra info for Generation Systems Software: Steam, gas and diesel plant
Aa Generator electromagnetic power p. u. aa ..... s ) Generator shaft torque p. u. aa Generator load angle Fig. 2 Three-phase-to-earth fault of200ms duration. 20 . . . , . . . . . . . ,. . . : . . . : . . . . . . . . . . . . . . . . 00 Generator voltage phase A p. u. 00 Til'l'lc(lI'IIs) Generator current phase A p. u. 00 - . ~ . . . ~ .. . ~. . ' . ~. . . :- . ; ...... ; .. ~. . 00 .. ~. . . Till'le(lI'IIs) Generator field current Fig. 1 Single-phase-to-earth fault of 200 ms duration.
4. 'imi~f VREF VT K1(1+sTD1) K2 (1+sTD~ K3(1+sT D~ 1+sT G1 1+sTG2 1+sT G3 block 1 block 2 block 3 ~------~-----I K4(1+sTD4) ~----~----~ 1+sT G4 block 4 Fig. 3 Standardized representation of IEEE AVR model. Kn( 1+s TDn ) 1+sTGn Kn Ton TGn - gain of block n leaD time-constant of block n laG time-constant of block n Fig. 4 Standardized transfer function block. The standardization of the transfer function blocks results in some care being required when evaluating and entering data, as described below.
K VA rating - generator rating in k VA. Rated voltage (kV) - the nominal line voltage of the generator in kV. Rated field current (A) - the value of field current which results in an airline open circuit emf Eo = IsXmd, where Is = rated stator current and Xmd is the d-axis magnetizing reactance. Rated power factor - the specified design power factor of the generator. 52 Simulation of the Performance of Generating Systems D-axis magnetizing reactance - the value of per-unit mutual reactance associated with the direct axis.