Abstract
We have developed new design methods for generator's excitation controller. The methods can improve damping and synchronizing torque to rise power transfer capability. The power transfer capability is evaluated in a one-machine connected infinite bus system and a multi-machine power system model.
(1) Development of a new optimization method for parameters of AVR and PSS: The method can improve both of damping power and synchronizing power based on eigenvalue sensitivity technique. Applying this method to 18-generator system model, the power transfer capability increases by 7% larger than a conventional method.
(2) Development of a new excitation system with a remote bus voltage as AVR input signal: Increasing of stabilized generator capacity, the power transfer capability expands much higher however its effect is saturated due to bus voltage instability. Introducing a remote signal of the bus voltage into the generator's exciter in addition to a conventional terminal voltage, the power transfer capability grows up to 63%.
(3) Comprehensive controller design scheme for practical use is proposed to enhance both of steady state stability and transient stability.
