Fuzzy Logic based Automatic Load Frequency control of Multi-area power systems | ISSN: 2321-9939 2013 | IJEDR1301002 INTERNATIONAL JOURNAL OF ENGINEERING DEVELOPMENT AND RESEARCH | IJEDR (All right reserved by www.ijedr.org) 13 Fuzzy Logic Based Automatic

Abstract — now days due to the increase in the interconnection of the power system, load as well as power flow in tie-line are varying dynamically. So there is a need of robust control of both systems frequency and tie-line power flows. This robust control can be attained using fuzzy logic controller rather than the conventional proportional, proportional integral and proportional integral derivative controllers. Because gain values of conventional controllers are constant, for load changes. Load can’t be constant, load changes time to time but gain values of conventional controllers are constant. In order to overcome the drawbacks of the conventional controllers, many techniques have been proposed in literature. In this work, fuzzy logic base controller is considered for load frequency control problem. The required rules are executed depending upon the load variation to minimize the error. In fuzzy logic controller, triangular membership function is used for making the rule base, because triangular membership function gives easy way to make the rule base compared to other membership functions. The system simulation is realized by using Matlab/Simulink software