Fuzzy Gain Scheduling for Load Frequency Control of Single Area Multi Source Hydro-Thermal-

Power system is a combination of a number of sources and loads properly linked by a transmission system. The source is a generating system fueled by renewable or non renewable system where bio mass fuel is used to generate electric power. Due to low levels of bio fuel availability, the gas turbine system is considered as a weak system when compared to thermal and hydro systems. However, stable operation can strong sources. The mathematical modelling of a gas turbine system was proposed by Rowen (1983). Later many authors have proposed several modelsfor gas turbine plant,Hamid Asgari Hannet et al (1995); Hannet and Khan (1993), but Rowen’s model is a proven model for the analysis of gas turbine plants to enhance its performance. With Rowen’s model as reference, a small signal model of gas turbine plant is developed for interconnected operation with thermal and hydro systems. The one line diagram of the Single Area Multi Source system is shown in Fig.1. A control strategy is formulated to control the frequency deviation in the single area system with s The modelling of thermal (Elgerd, 2000) and hydro systems (IEEE committee report, 1973) involve speed governors and turbine systems. These speed governors are identified with drooping c limitation of speed governor drooping characteristics of thermal and hydro systems, the frequency would settle with steady state error when the systems are subjected to load change. , 10(5) Special 2016, Pages: 137-143