Author(s)

Rajmohan Rajalakshmi¹, Vairamani Rajasekaran²

¹Department of Electrical and Electronics Engineering, Coimbatore Institute of Technology, Coimbatore, India.
²Department of Electrical and Electronics Engineering, PSNA College of Engineering and Technology, Dindigul, India.

This research work brings out the unique predictive current control method for attaining an efficient grid connected Photo Voltaic (PV) system by Shunt Active Power Filter (SAPF) as grid connected converter. The major objective of the research work is to address the presence of Direct Current (DC) component, frequency improvement, quicker theta response, voltage magnitude estimation in the input signal of the Phase Locked Loop (PLL) which is challenging. This work focuses on tuning the PLL block (K_p, K_i, K_v and K_o) through Artificial Bee Colony (ABC) optimization algorithm. The proposed ABC based modified three-phase PLL method is based on adding a new loop inside the PLL structure. In power converters, ABC algorithm is used to select the optimal switching states. The voltage vector which minimizes a cost optimization function is selected. Simulation is carried out for both balanced and unbalanced system and the results validate that the performance of the proposed approach is better in terms of harmonic compensation as per the IEEE standards within ±5%, power factor improvement of the system, quicker theta tracking and suppression of frequency jump with the interconnection of PV system.

Shunt Active Filter, Phase Locked Loop, Artificial Bee Colony, Current Control Method, PV System

Rajalakshmi, R. and Rajasekaran, V. (2016) Improved PLL Tuning of Shunt Active Power Filter for Grid Connected Photo Voltaic Energy System. Circuits and Systems, 7, 3063-3080. doi: 10.4236/cs.2016.710261.