Investigation of time delay effects on the frequency regulation of power system

Abstract

The restructuring of existing electrical power grid has imposed new newlinechallenges on the task of effective maintenance and reliable operation of newlinepower system. One of the most important challenges is to develop an newlineextensive infrastructure for information and communication sector in Load newlineFrequency Control (LFC) of power system. The control signals are newlinetransmitted from generation, transmission and distribution network to the newlinecorresponding control centers at remote locations with the help of different newlinecommunication links. Time delays associated with these communication newlinenetwork decreases the effective damping performance of the system and may newlineeven lead the power system to the loss of synchronization. Hence, it is newlineimportant to precisely investigate the impact of communication delays on newlinepower system stability. An earnest effort has been made to explore several newlinefrequency domain methodologies for investigating the delay-dependent newlinestability of power system including communication delays. The newlinecommunication delays in LFC system may be constant or time varying. This newlineresearch focusses on the implementation of various control algorithms for newlinestability analysis of LFC system including communication delays. It is newlinedemonstrated that the proposed control methodologies provide more newlineaccuracy, less conservativeness and minimum computational complexity newlineirrespective of the size of the system. Moreover an effective methodology has newlinebeen presented to design and optimize the gain of a controller for time newlinedelayed LFC system that improves the marginal stability of the system with newlineless degradation in its dynamic performance newline