Panda

Renewable energy sources (RESs) have been receiving significant attention recently worldwide as a sustainable alternative type of energy supply in the energy mix. Inverters are being used to convert the dc voltage into ac voltage before being injected into the grid or isolated loads.

In this presentation, a novel current control technique is proposed to control both active and reactive power flow from a renewable energy source feeding a micro-grid system through a single-phase parallel connected inverter. The parallel connected inverter ensures active and reactive power flow from the grid with low current THD even in the presence of non-linear load. A p-q theory-based approach is used to find the reference current of the parallel connected converter to ensure desired operating conditions at the grid terminal. The proposed current controller is simple to implement and gives superior performance over the conventional current controllers such as rotating frame PI controller or stationary frame Proportional Resonant (PR) controller. The stability of the proposed controller is ensured by direct Lyapunov method. A new technique based on the Spatial Repetitive Controller (SRC) is also proposed to improve the performance of the current controller by estimating the grid and other periodic disturbances. Detailed experimental results are presented to show the efficacy of the proposed current control scheme along with the proposed non-linear controller to control the active and reactive power flow in a single-phase micro-grid under different operating conditions.

Biography:

Sanjib Kumar Panda (Fellow, IEEE) received his B. Eng. degree from the South Gujarat University (India) in 1983, M.Tech. degree from the Indian Institute of Technology, Banaras Hindu University (India) in 1987, and Ph.D. degree from the University of Cambridge (UK) in 1991, all in electrical engineering.  Dr. Panda is currently the Chair of PELS TC 12 (Energy Access and Off-Grid Systems) and serves as an Associate Editor for various IEEE Transactions.