A review on current control techniques for inverter for three phase grid connected renewable sources

Renewable based power generation system and their grid interconnection throughout the world. Due to large penetration of renewable sources into the grid, maintenance of power quality, grid integrity and protection against islanding detection became a critical issue. One of the most important aspects in the renewable grid interconnection is the adoption and current control techniques for the inverter. These current controlled inverters must meet the grid criteria and international standard while interconnecting to grid. This paper presents a review on different types of current control techniques that has been adopted in the industry as per the best practices and state of technology. Various techniques and their control algorithms were discussed in two categories, like linear controller and non-linear controller. New current control techniques such as Artificial Neural Network, Fuzzy logic Controllers were also discussed in the paper. Performance analysis of different types of controller were also discussed in this paper for better understanding of the characteristics of the system. MATLAB/SIMULINK based test was carried out to the performance of the system.