Load Frequency Control Using Fuzzy Logic

In industry or any area increasing load is a vast problem for power generation plants due to increase in demand for power. So making balance between generation and demand is the operating principle of load frequency control (LFC). The reliable operation of a large interconnected power system necessarily requires an Automatic Generation Control (AGC). The objective of AGC is to regulate the power output of Generators within a specified area in response to change in the system frequency, tie line power or relation of the two to each other, so as to maintain the scheduled system frequency and power interchange in the other are within the prescribed limits Several studies in LFC have led to the trend of applying the adaptive approach to the implementation on automatic generation control (AGC). However, the adaptive controller with self tuning technique requires online acquisition of system parameters that was not clearly stated in the related literatures. Fuzzy controller and integral controller have been used to the models of single area power system and responses of area control error (ACE), tie line power and change in frequency are observed. The design of Fuzzy Logic Controller (FLC) involves the allocation of areas inputs and outputs , mapping of rules between inputs and outputs and defuzzification of outputs into a real value. There are some parameters (TP, M, β) which are used online for the adaptive tuning of fuzzy controller. We have solved for those parameters with model equations and used in the designing of the controller. Simulation results show that fuzzy control based estimate with an adaptive controller could enhance the performance of the LFC.