Load Frequency Control of A Typical Two Area Interconnected Power System by Using Battery Energy Storage System

摘要

The main objective of this paper is to maintain the constant frequency in two area interconnected power system by using Battery Energy Storage System (BESS) . When there is a variation in the load demand on a generating unit, there is a momenterial occurrence of unbalance between real power input and output. LFC helps in maintaining the scheduled system frequency and tie-line power interchange with the other areas within the prescribed limits .To control the load frequency and compensate the power imbalance the conventional controllers are used in olden days. But ,these conventional controllers are slow and donot allow the controller designer to take into account possible changes in operating condition and non-linearities in the generator unit.The advancement technique to control the load frequency, an external Battery Energy Storage (BES) system is incorporated. Frequency oscillations due to large load disturbance can be effectively damped by fast acting energy storage devices such as Battery Energy Storage systems.This paper presents the qualitative and quantitative comparison of conventional controllers and BES system in Load Frequency Control (LFC) of a typical two area interconnected power system. The performance of BESS over conventional controllers and how the disturbances are controlled and maintain the constant frequency with response are highlighted.