Abstract
This work deals with a single-stage three-phase grid connected solar photovoltaic-distribution static compensator (SPV-DSTATCOM) under partial shading condition (PSC). During PSC, the SPV-DSTATCOM is connected with the distribution network to solve issues like active current sharing, reactive power control, and harmonic elimination. The conventional Proportional Resonant (PR) controller behaves as a notch filter at resonance frequency with high gain in magnitude, and it has very little dc-offset rejection capability. Here, an improved PR based on second-order generalized integrator (IPR-SOGI) control architecture with unity gain at the fundamental frequency and more dc-offset rejection capability has been presented to address the drawback of the PR controller. The performance of the proposed controller is examined under different loading conditions in steady-state and dynamic conditions. Finally, a comparison between the proposed controller with the PR controller and adaptive PR controller (APR). The experimental validation of the proposed prototype has been carried out in the laboratory.
Highlights
I N recent years, the world pays attention to renewable energy sources due to the shortening of fossil fuel sources, air pollution, and global warming
The estimated fundamental components are passed through a sample and hold block, and it passed through a zero-crossing detector (ZCD), which are triggered by a quadrature-phase unit template corresponding to the respective phase
The available maximum power has been harvested from the Solar PV (SPV)-DSTATCOM under different dynamic conditions by using the ESA algorithm
Summary
I N recent years, the world pays attention to renewable energy sources due to the shortening of fossil fuel sources, air pollution, and global warming. Many advanced tuning methods has been proposed in different literature [7]–[9] These advanced tuning methods compete with each other in terms of computational burden, system stability, system dynamics response, improved system performance such as active current sharing with the presence of two sources, power quality issue, reactive power compensation, harmonic elimination, THD improvement of grid’s current and voltage, etc. These advanced tuning methods further lead to complicated control action and reduction of the system dynamics response. The proposed control structure is used for the calculation of the fundamental components, which are used to estimate the reference currents for the hysteresis current controller to generate gate pulses for VSC
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