Effect of CES on Load Frequency Control in Multiarea AC/DC Interconnected System

Abstract

This article briefs about an evaluation of dynamic impact of capacitive energy storage (CES) in load frequency control (LFC) in a renewable energy based three area power system. The proposed power system model consists of Thermal and solar thermal power plant in area 1, Thermal and wind plant in area 2, Thermal and Photovoltaic plant in area 3. The areas are interconnected through AC/DC tie line. In this study nonlinearities such as governor dead band and generation rate constraints are considered for thermal generating unit. Tilted-integral-derivative with filter (TIDF) controller is taken as a secondary controller. The system dynamic responses such a frequency deviation, tie power deviation and settling time of the proposed system are compared with and without CES with different types of controller. The simulated results showed that with the coordinated action of CES with proposed secondary controller the system dynamic performances have improved.