Comparison of ANN and ANFIS controller for PMSG Variable Speed WECS

This paper deals with the variable speed wind energy conversion systems (WECS), using PMSG. To overcome the demerits occurred in these systems. A new DC Optimal level reference standard, however maximum power point tracking (MPPT) algorithm also used to obtain the new optimal operating point for the power curve. This optimal operating point is depends upon DC Interlink Voltage and currents. The proposed ANN and ANFIS technique is simulated in MAT Lab/ Simulink software. Here the WECS is evaluated and compared with conventional ANN and ANFIS network methods. The problems related with the Power Co-Efficient , the tip speed ratio(TSR) and DC inter link voltage and average power is evaluated over the total power extraction of WECS has provided with the modern advantages with all these errors consideration and improvement. This control signal also derived in order to achieve MPPT along with this the total harmonic distortion (THD) is also calculated for all mentioned systems

CONTROL OF ISLANDED VOLTAGE IN VSC-BASED DISTRIBUTED GENERATION SYSTEM USING ANFIS TECHNIQUE

In this paper islanding operation of a voltage source converter based DG system with fuzzy logic controller is presented. In the grid-connected mode, a microgrid including its loads and DG units is connected to the main grid at the point of common coupling (PCC), the voltage-sourced converter is operated in the active and reactive power (PQ) control mode, by using conventional control scheme to control the active and reactive power exchange with the grid. In the islanded mode, the proposed ANFIS is used to control the voltage of the islanded system despite the load variability and uncertainties. The salient features of the proposed ANFIS are: 1) efficient to deal with the nonlinear systems 2) design does not depend on the mathematical model of the system and 3) less sensitive to the parameters variation than the conventional controllers. The frequency of the islanded system is dictated through the use of an internal oscillator. The simulation results are presented by using Matlab/simulink platform. The dynamic response of the DG system using the ANFIS have good transient behaviors compairing to the FLC and PI controllers