Droop control has commonly been used with distributed generators for relating their terminal parameters with power generation. The generators have also been assumed to have enough capacities for supplying the required power. This is however not always true, especially with renewable sources with no or insufficient storage for cushioning climatic changes. In addition, most droop-controlled literatures have assumed a single dc-ac inverter with its input dc source fixed. Front-end dc-dc converter added to a two-stage photovoltaic (PV) system has therefore usually been ignored. To address these unresolved issues, an improved droop scheme for a two-stage PV system has been developed in the paper. The Proposed scheme uses the STATCOM control structure in both grid-connected and islanded modes, which together with properly tuned synchronizers, and mitigates the harmonics, by providing Reactive power and Load current Subsequently the proposed scheme adapts well with internal PV and external grid fluctuations, and is hence more precise with its tracking, as compared with the traditional droop scheme. Simulation and experimental results are obtained using MATLAB Simulink.
Photovoltaic (PV) systems based on renewable energy sources are the most common, and together with battery energy storage systems (BESS), they form a hybrid power supply. When riding through the islanded mode, the operation of the PV system consists of control for maximum power point tracking (MPPT) or generation curta...
Lindemberg Roberto de Lima, Camila M. V. Barros, L. S. Barros· IEEE Access· 0 citations
This paper presents an optimized control strategy that enables a grid-connected photovoltaic (PV) system to operate as a static synchronous compensator (PV-STATCOM) to damp power oscillations in the transmission system, using an arithmetic optimization algorithm (AOA). The key contribution of this work is a synchronize...
Due to the wide spread of power electronics equipment in modern electrical systems, the increase of the harmonics disturbance in the ac mains currents has became a major concern due to the adverse effects on all equipment. Power electronic converters are commonly used for interfacing distributed generation (DG) systems...
T.Tulasi, G.Sailaja, V. S. Aditya· Journal of Science & Technol...· 0 citations
The reliable integration of multiple renewable energy sources into autonomous DC microgrid requires effective power sharing to ensure stable operation. Conventional droop control schemes often face issues, such as loop current sharing and inadequate voltage regulation. This paper introduces an adaptive droop contro...
Rajanikant A. Metri, C. Bhattar, Arun Thorat et al.· Circuit world· 0 citations
This paper proposes a control strategy for a modular multilevel converter (MMC)-based photovoltaic (PV) system operating under non-homogeneous irradiance and unbalanced grid voltage conditions. The considered topology integrates PV units directly into the MMC submodules, enabling distributed maximum power point trackin...
S. Barcellona, Marzio Barresi, L. Codecasa et al.· Electronics· 0 citations
The large-scale integration of renewable energy generation into the grid has led to increased frequency fluctuations in the power grid. Distributed energy storage systems, with their rapid response times, serve as a critical resource for primary frequency regulation. Traditional constant-droop control cannot adjust the...
