Power Quality Improvement for Wind Energy Conversion System using Composite Observer Controller with Fuzzy Logic

Abstract

In this paper, power quality at the distribution system has been examined by introducing an observer based control technique with fuzzy logic controller for wind energy conversion systems with constant wind velocity, for combination of linear, nonlinear loads and with load removal in one of the phases. The power quality improvement, including voltage regulation and reactive power management on the distribution side is achieved and the device used here is a distributed static compensator (DSTATCOM) a voltage source converter(VSC) based power electronic device. The performance is found to be satisfactory with the implementation of DSTATCOM for better voltage regulation with self-sustained DC link voltage at VSC of DSTATCOM. The fuzzy logic controller is used to generate gate pulses to VSC for power quality improvement and is simulated in MATLAB environment and results are studied. IndexTerms-Distributed static compensator (DSTATCOM), fuzzy logic controller, induction generator, nonlinear load, power quality, voltage control, voltage source controller (VSC).

Quality Control Strategy and Evaluation Algorithm for Noncontact Instrument Testing

“…Te application of the fuzzy logic control method can improve this situation. When designing the controller according to the "frequency domain method" of classical control theory and the "time-domain method" of modern control theory, it is necessary to know the precise mathematical model of the controlled object [16,17]. Although adaptive and self-tuning control greatly reduces the requirements for modeling accuracy, it requires a large number of prior data and online model identifcation with complex algorithms and high computational complexity, which limits its application.…”