Load Frequency Control of an Interconnected Power System Using H α Loop-Shaped Controller with Communication Delays

EasyChair Preprint 5112

Abstract

In an Interconnected power system, as a power demand varies randomly, both area frequency and tie-line power interchange also vary. Load frequency control (LFC) is of importance in electric power system operation to damp frequency and voltage oscillations originated from load variations or sudden changes in load demands. The objectives of load frequency control (LFC) is to minimize the transient deviations in these variables (area frequency and tie-line power interchange) and to ensure their steady state errors to be zeros. It is considered to the problem of power system load frequency control design incorporating the effect of using open communication network instead of a dedicated one for the area control error signals. A delay-dependent two-term Hα loop-shaped controller design has been proposed using linear matrix inequalities. The control error signal in LFC is called Area Control Error (ACE) which is a linear combination of net tie-line power error and frequency error. Comparison of effectiveness of the delay-dependent two-term H∞ loop-shaped controller design of the proposed two-term controller with that of existing one-term and two-term controller designs establishes the superiority as well as applicability of the present design for the LFC problem. The controller is constructed for a two area power system and the dynamic model of the power system and the controller design based on the model are elaborated in the thesis. Simulation results and frequency-domain analysis proved that Hα loop-shaped controller is attractive to the LFC problem in its stability and robustness

Keyphrases: H α loop controller, Load Frequency Control, Two-term controller Delay independent, time-delay system

@booklet{EasyChair:5112,
  author    = {B Prakash Ayyappan and R Kanimozhi},
  title     = {Load Frequency Control of an Interconnected Power System Using H α Loop-Shaped Controller with Communication Delays},
  howpublished = {EasyChair Preprint 5112},
  year      = {EasyChair, 2021}}