Robust control of a single-phase VSI with LCL filter for grid-tie and islanded operation modes applied to PV distributed generation in microgrids environment

This paper proposes a methodology to control a three-phase voltage source inverter with LCL filter for distributed generation (DG) in microgrid scenario. Thus, the presented control strategy allows the DG system to operate in both grid-connected and islanded modes with a smooth transition between them. Therefore, the DG control system strategy is performed by splitting the control input into two control-stages; the first one is in charge of reproducing sinusoidal voltages at the filter capacitors; meanwhile, the second is dedicated to modulate these voltages in order to achieve proper amplitude and phase for correct output current injection. By means of discrete-time state-space representation of the system, state-feedback controllers are obtained employing linear matrix inequalities considering uncertainties on grid inductances and optimization of the H2 norm for each operation mode. Finally, the feasibility of the proposed DG system is demonstrated and validated through computational simulations, as well as experimental evaluations.Keywords Grid-connected inverter • LCL filter • Linear matrix inequalities (LMIs) • Microgrid inverter • Robust control

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“…On the other hand, generation and coordination of the reference signals is similar to the described in Peña et al (2014).…”

Section: Control Schemementioning

confidence: 99%

Robust Control of Three-Phase VSI with LCL Filter for Distributed Generation Power Quality Improvement

Pena

Sampaio

Brito

et al. 2020

J Control Autom Electr Syst

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“…Besides the traditional three legs/three phase inverter [55,56], as can be seen in Figure 4b, other GFM topologies can be found in the literature related to VSI. One of these topologies is the single-phase full-bridge inverter, as seen in Figure 4a, which is the most common single-phase inverter [57][58][59][60][61]. Research on GFM inverters topology with four-leg, Figure 4c, has grown due to their functionalities and advantages in microgrid applications.…”

Section: Number Of Legsmentioning

confidence: 99%

Grid Forming Inverters: A Review of the State of the Art of Key Elements for Microgrid Operation

et al. 2022

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In the past decade, inverter-integrated energy sources have experienced rapid growth, which leads to operating challenges associated with reduced system inertia and intermittent power generation, which can cause instability and performance issues of the power system. Improved control schemes for inverters are necessary to ensure the stability and resilience of the power system. Grid-forming inverters dampen frequency fluctuations in the power system, while grid-following inverters can aggravate frequency problems with increased penetration. This paper aims at reviewing the role of grid-forming inverters in the power system, including their topology, control strategies, challenges, sizing, and location. In order to facilitate continued research in this field, a comprehensive literature review and classification of the studies are conducted, followed by research gaps and suggestions for future studies.

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“…The PCC voltage is measured and communicated to the synchronising DG unit that uses a PLL to obtain the voltage rms and its phase angle. In [104], the strategy used for the modelling and control of a single‐phase VSI with inductor–capacitor–inductor filter, adapted to PV. This technique is able to operate in both scenarios: in network‐connected mode and in island mode.…”

Section: Islanding and Mg Operationmentioning

confidence: 99%

Photovoltaic power plants in electrical distribution networks: a review on their impact and solutions

Mansouri

Lashab

Guerrero

et al. 2020

IET Renewable Power Generation

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Robust control of a single-phase VSI with LCL filter for grid-tie and islanded operation modes applied to PV distributed generation in microgrids environment

Cited by 11 publications

References 16 publications

Robust Control of Three-Phase VSI with LCL Filter for Distributed Generation Power Quality Improvement

Robust Control of Three-Phase VSI with LCL Filter for Distributed Generation Power Quality Improvement

Grid Forming Inverters: A Review of the State of the Art of Key Elements for Microgrid Operation

Photovoltaic power plants in electrical distribution networks: a review on their impact and solutions

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