Title :
Placement of variable impedance devices for enhancement of small signal stability in power systems
Author :
Messina, A.R. ; Begovich, M.O. ; Sanchez, Edgar N.
Author_Institution :
IPN, Unidad Guadalajara, Mexico
Abstract :
This paper presents an efficient analysis and design method, based on the analysis of controllability and observability measures to place variable impedance devices for enhancement of small signal stability in complex power systems. An advanced linear state model of the power system that includes the representation of high-speed thyristor-based control of variable impedance devices is derived. Based on this representation, a numerically stable algorithm is given for computing controllability of critical system modes as a measure of the distance of the linear state representation from the nearest uncontrollable system. This approach is then extended for computing observability. A location index for variable impedance devices is finally defined from controllability and observability measures
Keywords :
controllability; observability; power system interconnection; power system stability; static VAr compensators; thyristor applications; analysis method; controllability measures; design method; high-speed thyristor-based control; linear state model; location index; observability measures; power systems; small signal stability enhancement; variable impedance devices placement; Control system analysis; Controllability; Design methodology; Impedance measurement; Observability; Power system analysis computing; Power system measurements; Power system modeling; Power system stability; Signal analysis;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704061
