Voltage Regulation by Reactive Energy Compensation Using Fuzzy Logic Controller Based ASVC Device

The improvement in power semiconductor devices acts as a major factor for the increased importance of power electronics in future power system [1]. Reactive energy compensation is an important aspect of power systems. The flow of reactive power in the transmission line is to be controlled by FACTS (Flexible Alternating Current Transmission Systems) devices which are based on high speed power electronics [2]. The FACTS equipments can provide controlled reactive power compensation to the power system for voltage control, power flow control and power oscillation damping [3]. The Advanced Static Var Compensator (ASVC) is one of the most widely used FACTS which is based on a voltage source converter with a DC link capacitor. Recently, Artificial Intelligence (AI) techniques have been discussed in literatures to solve problems related to ASVC design. One of this AI approach like Fuzzy Logic Control (FLC) has received much attention in control applications. The proposed ASVC is modeled using MATLAB/Simulink sim power systems (SPS) toolboxes. The dynamic performance of the ASVC is tested for varying reference reactive power using FLC, by controlling the reference terminal voltage and under the switching of the inductive and capacitive loads.