ANFIS Controller for AGC in Restructured Power System

摘要

This paper investigates the ANFIS controller for an Automatic Generation Control (AGC) problem in a restructured power system. The intense participation of Gencos in restructured system leads to aggressiveness in frequency and tie-line responses which in turn affect the generation related ancillary services. For this reason, the ANFIS controller is designed to improve the dynamics, such as reducing the overshoot, minimizing settling time, reduce the steady state error of frequency and tie-line power deviations and maintain the balance between generation and demand. Five area control structure with Hydro-Thermal-Gas power generations are considered here as a test system. In each control area, the effects of the feasible contracts are treated as a set of new input signals in a modified traditional dynamical model. The key benefit of this strategy is its high insen-sitivity to large load changes and disturbances in the presence of plant parameter inconsistency and system nonlinearities such as Generation Rate Constraint (GRC) and Backlash. This newly developed scheme leads to a flexible controller with a simple structure that is easy to realize and consequently it can be constructive for the real world power system.