Abstract
A repetitive predictive control for grid-connected inverter current control scheme is presented in this paper under voltage harmonic distortion in the stationary reference frame. Predictive control is an approach that uses a receding horizon to achieve the optimal track for the reference. In this approach, the repetitive controller behavior is added to the predictive control to increase its performance under distorted voltage conditions. In addition, to apply the controller in the generation system, controller is designed from the perspectives of the power system. The controller is designed considering the state-space model in the stationary reference frame. The controller performance was verified using a laboratory experimental setup under distorted grid voltage condition. Experimental results confirm that the proposed controller can effectively suppress harmonics under both normal operation and distorted grid voltage conditions, and also satisfy the requirements stipulated in IEEE Std. 1547.2-2008.
Highlights
T O decrease CO2 emissions from power generation the demand for renewable energy is rapidly increasing around the world [1]
The Predictive-Repetitive Control (PRC) proposed in this paper is applied to inverter grid-connected and modeled by the fundamental frequency, but to evaluated the efficiency the tests were performed under distorted voltage
The experimental workbench consists of a Texas Instruments Digital Signal Processor (DSP) model TMS320F28335, electronic boards for the correct acquisition of the current (i) and voltage (v) variables and a Back-to-Back inverter of the model "Semikron SKS20F (B6CI)2P+E1CIF+B6U 14V12" connected to a distorted grid by means of inductive filters
Summary
T O decrease CO2 emissions from power generation the demand for renewable energy is rapidly increasing around the world [1]. Many predictive control techniques have been proposed for grid-connected inverters, one of them is the Model Predictive Control (MPC) [16], [17], which uses the future behavior of the system to obtain the control law and achieve the reference signal [18], [19]. This research contributes to the academic literature as it proposes an alternative technique to mitigate the grid current due to the deformation caused by the harmonic components in grid voltage This type of controller can be found in the robotics system as presented in [29], and in power electronics as PMSM machines which operate with variable switching frequency [30].
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