Novel Control Technique for Power Quality Improvement in PV - Wind Operated Hybrid Standalone System with TSK Fuzzy Controllers

Abstract

Power generation and supplying to electric loads through hybrid renewable energy sources is one of the best choices to reduce global warming as well as fulfill the needs of electric loads in many rural places. Hence establishing standalone hybrid power supply systems are becoming increasing day by day. However, due to atmospheric changes, a storage device (i.e., battery bank unit (BBU)) along with proper energy management system must be integrated into standalone system to manage power balance between load and generation. Photovoltaic-wind-battery powered standalone power supply system is considered in this work. An effective control mechanism is proposed to supply the quality power at load bus. Due to drawbacks of conventional PI controllers, a Takagi Sugeno Kang Fuzzy controller is used in proposed control methodology. Dual inverter configuration is implemented in this research work, one is operated between AC load bus and dc-link, the other one is in between BBU and AC load bus. In order to manage power balance in the system, a dc to dc bidirectional circuit is placed between batteries and inverter. In this configuration, the operation similar to inter line power flow controller is achieved by operating the inverter between BBU and AC load bus by proposed method. The Hardware-in the-Loop is designed for analyzing various case studies in the results by connecting two OPAL-RT devices.

Keywords

• tsk-fuzzy controllers renewable energy sources
• power quality
• dual inverter mode
• interline power flow