Title :
Influence of the infinite-bus assumption in the design of damping controllers
Author :
de Oliveira, R.V. ; Ramos, R.A. ; Bretas, N.G.
Author_Institution :
Sao Carlos/USP, Sao Carlos
Abstract :
The present paper analyzes the influence of the infinite-bus assumption in the design of damping controllers, evaluating its effects by a comparison with two other alternatives. The first alternative is the use of a multimachine model adopting one machine angle of the system as angular reference. The second alternative is the incorporation of the primary speed control in the multimachine model of the system. The damping controllers used in the analysis are designed through a systematic methodology that uses robust control techniques. It is possible to observe, in the obtained results, that the infinite-bus assumption modifies the system dynamics, degrading the performance of the system equipped with the controllers designed over models with such assumption. The use of multimachine models without the infinite-bus assumption in the controller design provided an improvement in the performance of the closed loop system, in all the performed tests.
Keywords :
closed loop systems; control system synthesis; power system control; power system transient stability; robust control; closed loop system; damping controllers design; infinite-bus assumption; primary speed control; robust control techniques; Control systems; Control theory; Damping; Design methodology; Power generation; Power system dynamics; Power system modeling; Power system stability; Power system transients; Robust control; Power system; damping controllers; robust control; small signal stability;
Conference_Titel :
Power Tech, 2005 IEEE Russia
Conference_Location :
St. Petersburg
Print_ISBN :
978-5-93208-034-4
Electronic_ISBN :
978-5-93208-034-4
DOI :
10.1109/PTC.2005.4524427
