Fuzzy Pid Controller for Load Frequency Control of Two-Area Power System Considering Generation Rate Constraint

In this paper a fuzzy proportional-integral-derivative controller (FPIDC) is proposed for load frequency control of two-area interconnected power system with generation rate constraint (GRC). The FPIDC is developed as a set of heuristic control rules, and the control signal is directly deduced from the knowledge base and the fuzzy inference mechanism rather than adaptation of the parameters of another controller. The dynamic performance is studied for 1% step load perturbation in area-1 of the two-area power system. The results are compared with conventional integral controller (CIC) implemented on the same system. Simulation results indicate that the proposed FPIDC is very effective and better than CIC in damping the frequency and tie-line power flow oscillations and tracking the deviation errors of both these variables to zero at steady state. The dynamic performance of the proposed controller is superior to the CIC in terms of the frequency and tie-line power deviation oscillations, settling time etc. Further, the FPIDC is a simple and computationally efficient scheme to implement. Simulations have been carried out using Matlab®. 1 Associate Professor, E-mail: [email protected] 2 Professor Department of Electrical Engineering, E-mail: [email protected]. 1,2 National Institute of Technology, Kurukshetra-136119, India