TY  - JOUR
TI  - The effect of demand response control on stability delay margins of load
frequency control systems with communication time-delays
AB  - This paper studies the effect of dynamic demand response (DR) control on stability delay margins of load
frequency control (LFC) systems including communication time-delays. A DR control loop is included in each control
area, called as LFC-DR system and Rekasius substitution is utilized to identify stability margins for various proportionalintegral (PI) gains and participation ratios of the secondary and DR control loops. The purpose of Rekasius substitution
technique is to obtain purely complex roots on the imaginary axis of the time-delayed LFC-DR system. This substitution
first converts the characteristic equation of the LFC-DR system including delay-dependent exponential terms into an
ordinary polynomial. Then the well-known Routh–Hurwitz stability method is applied to find those imaginary roots and
the corresponding stability delay margin known as maximal time-delay. Delay margin results indicate that the inclusion
of DR control loop significantly increases stability delay margin and improves the frequency dynamic behavior of the
LFC system including time-delays. Theoretical stability margins are confirmed by a proven algorithm, quasi-polynomial
mapping-based root finder (QPmR) algorithm and time-domain simulations.
AU  - KATİPOĞLU, Deniz
AU  - Ayasun, Saffet
AU  - Naveed, Ausnain
AU  - sonmez, sahin
DO  - 10.3906/elk-2006-165
PY  - 2021
JO  - Turkish Journal of Electrical Engineering and Computer Sciences
VL  - 29
IS  - 3
SN  - 1300-0632
SP  - 1383
EP  - 1400
DB  - TRDizin
UR  - http://search/yayin/detay/522906
ER  -