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Adaptive Neuro-Fuzzy Inference System (ANFIS) Control for Total Harmonic Distortions Reduction of Multi-Pulse STATCOM

Priti N. Nimbalkar, Pratik Ghutke, Prashant Thakre


       In this paper proposed ANFIS System is adapted for controllable mitigation of Total harmonic distortions of STATCOM with Multiple pulse technology. Integrated power electronics device, Gate Turn Off (GTO) is used in switching mode with Voltage source convertor during application of distinct load conditions. The proportional and integrated Controller is replaced by a smart fuzzy logic controller that offers great support for harmonic mitigation by redefining the electrical magnitudes of voltage and current for satisfactory operating conditions. Using ANFIS (Adaptive neuro-fuzzy inference system) control system, better results are observed for the simulation system in MATLAB. This modified controller is useful to enhance the transmission and distribution system working by limiting the THD content. The unique combination of this hybrid mode of artificial intelligence system of Fuzzy and Neural network give their contribution to stabilize the system voltage margin. As voltage harmonics is created by impedance which always exists in between the sending and receiving end of the system.  Electrical power converters and different types of Electric drives is used absolutely in all machineries causes several harmonics in the system, several huge capacity capacitors are installed for power factor improvement also cause system harmonics and resonance with existing system, so altogether are utilized for reducing energy cost but such power system come across the issue of relatively generated significant harmonics. Hence to conquer over such harmonic’s problems, several FACTS controllers are highly desirable for better control for dynamic stability and harmonic mitigation by providing the reactive and real power compensation for regulated voltage and currents through the way they connected to the respective network through VSC. The novelty of this new ANFIS control utilization is beneficial for the power system lines which in this modern era is a combination of complex, highly spread, power electronics-based nonlinear system integrated components. Explosion of electronics-based equipment and semiconductor devices due to their economical aspect, compact size and low cost over energy as well as easy operational conditions are being widely used in modern power system.


Keywords: fuzzy logic controller (FLC), Flexible AC Transmission System (FACTS), Total Harmonic Distortions (THD), Gate Turn Off (GTO), Adaptive Fuzzy inference System (ANFIS).

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