Title :
Stability investigation of a longitudinal power system and its stabilization by a coordinated application of power system stabilizers
Author :
Ao, Z. ; Sidhu, T.S. ; Fleming, R.J.
Author_Institution :
Power Syst. Res. Group, Saskatchewan Univ., Saskatoon, Sask., Canada
fDate :
9/1/1994 12:00:00 AM
Abstract :
This paper presents the results of a stability investigation of a power system with longitudinal structure and its stabilization by coordinated power system stabilizers (PSSs). The effects of the existing controllers on system stability are studied. If no PSSs are present, the damping of various swing modes in the system will be very poor and low frequency oscillations present. Eigenvalue analysis shows that the undamped modes are sensitive to excitation control while speed governors have little influence on damping. In order to enhance the overall system stability through excitation control, a coordinated design procedure for power system stabilizers has been developed based on generation coherency, total coupling factor and nonlinear simulation. A PSS designed using this procedure is robust to different operating conditions and very effective for damping oscillations. Comprehensive simulation studies were conducted and results are presented
Keywords :
circuit oscillations; control system analysis computing; control system synthesis; damping; digital simulation; eigenvalues and eigenfunctions; power system analysis computing; power system control; power system stability; LF oscillations; computer simulation; damping; design; eigenvalue analysis; excitation control; generation coherency; longitudinal power system; nonlinear simulation; power system stabilizers; robustness; speed governors; swing modes; total coupling factor; Control systems; Damping; Eigenvalues and eigenfunctions; Frequency; Nonlinear control systems; Power system analysis computing; Power system control; Power system simulation; Power system stability; Power systems;
Journal_Title :
Energy Conversion, IEEE Transactions on
