Design and Implementation of Flexible Control Strategy for Stand Alone Wind Generator System

Abstract:

This paper presents the design and implementation of the flexible control strategy for stand alone wind generator system controlled by a digital signal processor. The system is composed of a wind generator, a step-up dc/dc converter and battery energy storage system (BESS). The wind generator is the main power source of the system, and the BESS is used for energy storage and power compensation for the lack of stability of the wind power. Since the output power of wind generator varies with the change of wind speed, a flexible control strategy is used to determine the system working state and the operating mode of BESS. In charging mode, the battery is charged by multi-stage current charging method with maximum power point tracking (MPPT) algorithm to raise the charging efficiency and completely employ the finite power. Fuzzy logic control algorithm is used to improve the transient response when the battery discharges in discharging mode. Finally, a 100 W power converter system is constructed and the performance is verified.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 1169-1173
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.1169
• Online since: January 2012
• Authors: Chih Chiang Hua, Chih Wei Chuang, Yu Chi Liao
• Keywords: BESS, Fuzzy Logic Control, MPPT, Wind Generator

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