Abstract
This paper proposes a novel control strategy for grid connected current source inverter (CSI) without using a phase locked loop (PLL). The proposed finite set model predictive direct power control (FS-MPDPC) is based on direct power control (DPC) and model predictive control (MPC), and it is introduced for the first time for CSIs. The FS-PDPC controls separately the active and reactive power, using an appropriate discrete-time prediction model to predict the future behaviour of the powers to be injected into the grid, and a cost function for the selection of the optimal control signals to be applied on the switches of the power converter. The proposed control technique is simulated in Matlab/simulink® software. The obtained results verify the effectiveness of this method during different test.DOI: http://dx.doi.org/10.5755/j01.eie.23.5.19240
Highlights
Renewable energy resources are environmentally clean, free, and abundant in the nature
current source inverter (CSI) are seen as matter of great importance, due the features they offer, such like reliability, ruggedness, inherent short circuit protection, low harmonic distortion
The primary advantage of CSIs as compared to Voltage source inverters (VSIs) is that CSIs are capable to transfer power from a low DC voltage to a higher AC voltage level in single stage with no need for a cascaded boost converter of a step up transformer
Summary
Renewable energy resources are environmentally clean, free, and abundant in the nature. AC voltages required in certain applications can be obtained from a low voltage source This makes CSI suitable to interface renewable distributed generation (DG) sources or DC microgrids with AC grids for power injection [1]. A new control strategy has appeared in the field of control of power converters, named finite-set model predictive control (FS-MPC). It is a promising advanced control method that explicitly uses the system’s model to predict its future changes. Recent research works on grid connected CSI have focused on control strategies, new modified CSI topologies, improved modulation techniques, grid faults mitigation, resonance damping methods, and other.
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