A Decomposition Based Adaptive Power Smoothening Control for a Solar Photovoltaic System With Mode Switching Abilities

Solar energy can potentially be used anywhere there is good solar exposure and is secure, sustainable, and economical. A photocell is a fundamental component of solar photovoltaic generation (SPVG), which produces dc power through solar light exposure. When connected to grid, a voltage source converter (VSC) is necessary to convert dc into ac. These power electronic converters impact electrical grid's power quality, which results in harmonics distortion and voltage oscillations. In order to manage VSC and produce high-quality power for supplying electricity to utility grid, a cascaded variational mode decomposition technique is presented in this article as a novel filtering technique from the decomposition filter family. Performance of proposed control is investigated in grid-connected mode and standalone mode using an SPVG grid-tied double-stage architecture. Harmonics are introduced into electrical systems by nonlinear electronic switching components such as computer power supplies, variable frequency drives, and energy-efficient lighting. Due to extensive connectivity of residential nonlinear loads in the grid, the grid voltages are tainted by harmonics. To lessen that, a cascaded type-2 type-1 generalized integrator is used as a prefilter in this article. SPVG system is simulated using MATLAB and verified by a prototype in the laboratory to evaluate effectiveness and efficacy of proposed control and prefilter.