Title :
On-off control of an active load for power system damping-theory and field test
Author :
Samuelsson, Olof ; Akke, Magnus
Author_Institution :
IEA, Lund Univ., Sweden
fDate :
5/1/1999 12:00:00 AM
Abstract :
Controlled resistive loads can contribute to damping of electro-mechanical oscillations. This paper presents an on-off damping controller for a single machine system. It was used at a field test in Southern Sweden to damp oscillations of a 0.9 MW hydro power generator. The controller used estimated machine frequency as input and controlled a 20 kW resistive load via thyristor switches. The field measurements are compared to time simulations and a systematic procedure for tuning the controller is given. The results indicate that on-off control of active loads is effective in terms of added damping and that it is simple to tune and implement
Keywords :
control system analysis; control system synthesis; damping; hydroelectric generators; hydroelectric power; on-off control; oscillations; power system control; 0.9 MW; 20 kW; active load; control design; control simulation; controlled resistive loads; controller tuning; electromechanical oscillations damping; estimated machine frequency; field measurements; on-off control; power system damping; thyristor switches; time simulations; Control systems; Damping; Frequency estimation; Power generation; Power system control; Power systems; Switches; Testing; Thyristors; Time measurement;
Journal_Title :
Power Systems, IEEE Transactions on
