Modelling of a Fuzzy-Based STATCOM to Ensure Power Quality

Power electronic devices are inherently non-linear and draws reactive power and related harmonics from the supply source. For three phase system, these PE devices drains excessive neutral current and may also unbalance the system. The excessive neutral current, imbalance, reactive power burden, harmonics injection etc, are the major causes of lowering system efficiency and power factor thereby affecting the efficient power quality. One of the most striving issue in electrical industry today is power quality and with the development of contemporary and complex gadgets, whose performance is dependent on quality of supply, it becomes even more vital. The majority of industrial loads are driven by electronic switches/equipment those are sensitive to disturbances. The power quality concerns namely, voltage flickers, sags, swells, imbalance load, harmonics etc. causes intolerance to industrial loads. The FACTS control topologies have adorable importance in maintaining the power quality as they play very crucial role in reactive power compensation. These controllers are available in wide range and flexible in operation so as to cope with disturbances caused. This paper focuses on development and implementation of fuzzy based STATCOM in three phase transmission system. The proposed model encourages fuzzy based STATCOM's high dynamic performance and compensation range. The purpose of the paper is to create a fuzzy logic controller and compare its performance to that of a traditional controller. This is used to correct for current and voltage quality concerns in sensitive loads. The data are analyzed and reported using the MATLAB/Simulink software.