研究目的
To propose a robust ensemble Kalman filter (EnKF) based control for a multifunctional three phase grid-connected solar energy conversion system with distribution static compensator (DSTATCOM) abilities, aiming to enhance power quality (PQ) of the distribution grid by balancing grid currents, mitigating harmonics current, and maintaining unity power factor.
研究成果
The proposed robust EnKF based control algorithm effectively improves the PQ of the distribution grid by balancing grid currents, mitigating harmonics, and maintaining unity power factor. The algorithm demonstrates superior performance compared to conventional methods, with satisfactory response under various dynamic scenarios. The adaptive DC link voltage approach reduces losses in the VSC, and the improved RCGA algorithm ensures effective regulation of the DC link voltage.
研究不足
The study focuses on a specific configuration of grid-connected solar energy conversion systems and may not cover all possible grid scenarios or configurations. The computational complexity, although improved, may still pose challenges for very large-scale systems.
1：Experimental Design and Method Selection:
The study employs a robust EnKF based control algorithm for PQ improvement in grid-connected solar energy conversion systems. The methodology includes simulation in MATLAB with Simscape directory and experimental validation using a laboratory prototype.
2：Sample Selection and Data Sources:
The system includes solar PV array, nonlinear load, interfacing inductor, RC filter, three phase grid, a boost converter, and voltage source converter (VSC). Data are sourced from simulations and experimental measurements.
3：List of Experimental Equipment and Materials:
Includes Hall-Effect based voltage and current sensors, opto-couplers, digital signal processor (DSP-dSPACE-1102 MicroLab box), digital storage oscilloscope, and power analyzer.
4：Experimental Procedures and Operational Workflow:
The procedure involves simulation of the system under various scenarios (load imbalancing, change in solar irradiations, under voltage, over voltage, and voltage imbalanced) and experimental validation of the proposed control algorithm.
5：Data Analysis Methods:
The performance is analyzed based on THDs of grid currents, power quality improvement, and computational complexity compared to conventional methods.
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