Title :
Decentralized stability-enhancing control of synchronous generator
Author :
Machowski, J. ; Robak, S. ; Bialek, J.W. ; Bumby, J.R. ; Abi-Samra, N.
Author_Institution :
Inst. Elektroenergetyki, Warsaw Univ. of Technol., Poland
Abstract :
Summary form only given, as follows. This paper describes new structures for stability-enhancing excitation controllers designed using a nonlinear multi-machine system model and Lyapunov´s direct method. Two control structures are presented: a hierarchical structure in which the AVR is the master controller and the PSS the slave controller and a traditional structure in which the PSS constitutes a supplementary loop to the main AVR. Both controllers are shown to be robust, as the damping they introduce into the system is insensitive to changes in both the system topology/parameters and the pattern of network flows. Each individual controller contributes positively to the overall system damping with no undesirable interaction between controllers. These features should allow a decentralized approach to the design of the AVR+PSS. Such a design approach is compatible with the new competitive market structures and should result in savings on commissioning costs. Simulation results for a multi-machine power system are presented that confirm the above and show that the two control structures are very effective in damping both local and inter-area power swings
Keywords :
Lyapunov methods; control system analysis; control system synthesis; damping; decentralised control; machine control; machine theory; nonlinear control systems; power system control; power system stability; robust control; synchronous generators; voltage control; AVR; Lyapunov´s direct method; PSS; competitive market structures; control design; control simulation; control structures; damping; decentralized stability-enhancing control; hierarchical structure; inter-area power swings; local power swings; nonlinear multimachine system power model; synchronous generator; Control systems; Costs; Damping; Master-slave; Network topology; Nonlinear control systems; Power system simulation; Robust control; Stability; Synchronous generators;
Conference_Titel :
Power Engineering Society Summer Meeting, 2000. IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-6420-1
DOI :
10.1109/PESS.2000.867493