Damping and synchronizing torque computation in multimachine power systems

Abstract

J o r d a n U n i v e r s i t y of Sciexict:'tlrloluffy K illg P&d [ J n i v c r z i t y o f P e t r o l e u m and M i n e r a l s I rbid , J o r d a n Dhahrati , Saiitli A r a b i a Abstract -The p a p e r p r e s e n t s a metkid f o r c a l c u l a t i n g t h c damping arid s y n c h r o n i z i n g t o r q u e s i n multimachine power syst.c.msi. This method is a p p l i e d t o evicluat,e the damping and s y n c h r o n i s i n e t o r q u e s i n int,erct>niiect.etl power s y s t e m , weakly cxiupled and e l o s e L y c o u p l e d machines f o r d i ffererit o p e r a t i n g conditicmfi and machine p a r a m e t e r s . The i n v e s t i g a t . i 011 i n enhanced by modal a r r a l y e j a . It i s foilrid t h a t b o t h apprqachen; namely t h e damping and s y n c h r o n i z i n g t o r q u e s and modal a n a l y s i s complement e a c h o t h e r 1.0 p r o v i d e i n s i g h t i tito t h e s t a b i l i t y of m u l t i m a c h i n e power s y s t e m s .KEYWORDS : Damping and synchron ixi ng torqut:u , s t a b i l i t y a n a l y s i s , modal a n a l y s i s . m u l t i m a c h i n e s y s t e m s .

Location methods of oscillation sources in power systems: a survey

“…For an SMIB system, the damping torque coefficient can be estimated using the system response by using the least square method [26,27] or Kalman filter [28]. To extend the concept to multi-machine power systems, the first attempt in [29] estimates the damping torque for each single generator using its own electrical torque, rotor angle and rotor speed trajectories based on the least square error. However, this intuitive extension is found to be valid only when the speed deviations for all other generators are zeros, while it is not tenable in general [30].…”

Synchronizing and Damping Torques of Saturated Dual-Excited Alternators

“…Having the smaIloscillation time responses of the torque, speedand rotorangle,a least square error algorithm is applied to determine both K. and K.t (10]. This algorithm yields the …”

“…Synchronizing and damping torque coefficients have been used as indices for the dynamic stability ofalternators since 1927, [6][7][8][9][10]. Many attempts havebeen done to improve both the method of calculation of these coefficients [6][7][8][9][10] and the model representing the machine (11)(12)(13).…”

“…Many attempts havebeen done to improve both the method of calculation of these coefficients [6][7][8][9][10] and the model representing the machine (11)(12)(13). Previous authors [14][15][16] have adopted the conventional equivalent circuit to model the dual excited alternator.…”

On-Line Estimation of Synchronizing and Damping Torque Coefficients Using an Artificial Neural Network Based Approach

“…The offline method has been successfully applied in the case of single machine to infmite bus systems [14][15][16][17] and was extended to multimachine systems [18,19]. The method was, also, used to examine the effect of system loading on the system stability.…”