Title :
Nonlinear Control of FACTS Controllers for Damping Interarea Oscillations in Power Systems
Author :
Zarghami, Mahyar ; Crow, Mariesa L. ; Jagannathan, Sarangapani
Author_Institution :
Electr. & Comput. Eng. Dept., Missouri Univ. of Sci. & Technol., Rolla, MO, USA
Abstract :
This paper introduces a new nonlinear control of flexible ac transmission systems (FACTS) controllers for the purpose of damping interarea oscillations in power systems. FACTS controllers consist of series, shunt, or a combination of series-shunt devices which are interfaced with the bulk power system through injection buses. Controlling the angle of these buses can effectively damp low frequency interarea oscillations in the system. The proposed control method is based on finding an equivalent reduced affine nonlinear system for the network from which the dominant machines are extracted based on dynamic coherency. It is shown that if properly selected, measurements obtained from this subsystem of machines are sufficient inputs to the FACTS controllers to stabilize the power system. The effectiveness of the proposed method on damping interarea oscillations is validated on the 68 bus, 16 generator system of the New England/New York network.
Keywords :
damping; flexible AC transmission systems; nonlinear control systems; oscillations; power system stability; power transmission control; FACTS controller; New England; New York; damping interarea oscillation; dynamic coherency; flexible AC transmission system; nonlinear control system; power system stability; series-shunt devices; Control systems; Damping; Flexible AC transmission systems; Frequency; Generators; Nonlinear control systems; Nonlinear dynamical systems; Nonlinear systems; Oscillators; Phasor measurement units; Power system control; Power system dynamics; Power systems; Coherent groups; dominant machines; flexible ac transmission systems (FACTS); interarea oscillation; nonlinear control; phasor measurement unit (PMU); wide-area control;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2010.2055898