In this research study, the control of active & nonactive powers in a single-phase grid-connected cascaded H-bridge multilevel solar inverter is demonstrated for non-linear loads. Dc-link voltage control of individual power cells is implemented with independent Maximum power point tracking (MPPT) control. Voltage drift control is utilized to improve the performance under varying solar irradiance. The nonactive current reference is derived using generalized nonactive power theory, which allows the inverter to provide the necessary nonactive power to improve grid power quality. Precise harmonic reduction and tracking are achieved through a proportional-integral (PI) controller while maintaining grid current at unity power factor. The complete system is simulated in MATLAB/Simulink & the outcomes thus obtained are given and discussed in detail. The effectiveness of the harmonic compensation is presented using harmonic profiles of load, grid, and inverter current waveforms.
Active and Nonactive Power Control of Single-phase Grid-connected Cascaded Multi-level Solar Inverter
31.07.2024
1773524 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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