Proportional-Resonant Controller And LCL Filter Design For Single-Phase Grid-Connected PV Micro-Inverters

Cossoli, Pedro; Cáceres, Manuel; Vera, Luis Horacio; Firman, Andrés; Busso, A.

doi:10.1109/tdc-la.2018.8511669

Cited by 15 publications

(3 citation statements)

References 9 publications

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“…Where; L1 is the inverter side inductance, VDC is the boosted DC voltage, ∆𝐼 1 𝑚𝑎𝑥 is the maximum inverter current ripple which is approximately 20% of grid current, and Fsw is the switching frequency [36].…”

Section: Proposed System Design 31 Lcl Filtermentioning

confidence: 99%

Analysis and design of photovoltaic three-phase grid-connected inverter using passivity-based control

Abed

Hassan

Hameed

2022

IJPEDS

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This paper presents photovoltaic three-phase grid-connected inverter with an inductor-capacitor-inductor (LCL)-filter. For robustness against variation of filter parameters and external disturbance, the passivity-based control (PBC) method has been adopted. In this method, there are two interactively coupled feedforward terms and three damping gains in the control loops which are designed to limit the steady state error of grid current. Boost converter with P&O maximum power point tracker (MPPT) is used for each photovoltaic (PV) string to extract maximum power and to raise the PV voltage to a value suitable for the grid-connected inverter. The outputs of all boost converters are connected in parallel and controlled to fixed reference voltage using proportional-integral (PI) controller to make the direct-current (DC) link voltage robust against variations in sun radiation intensity and system parameters change. The suggested system is analyzed, designed and simulated using PSIM program. 1 kW, 2kW, and 3kW PV systems connected to grid of 220V/50Hz are tested and the results show the validity of the suggested grid-connected PV systems and robustness against filter parameters variation.

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Section: Proposed System Design 31 Lcl Filtermentioning

confidence: 99%

Analysis and design of photovoltaic three-phase grid-connected inverter using passivity-based control

Abed

Hassan

Hameed

2022

IJPEDS

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“…Posteriormente, esta tensión DC se aplica como entrada (bus DC) a un inversor en puente, que produce en su salida la señal senoidal monofásica de 120 VAC / 60 Hz, a ser aplicada a la carga. Debido a la presencia de componentes armónicas a la salida del circuito inversor, se realiza un filtrado de paso bajo del tipo LCL [6]. En términos del control de los circuitos convertidores de potencia, para el caso del DC/DC elevador se aplica una técnica MPPT basada en el algoritmo P&O (perturbar y observar) modificado para ajustarse a las condiciones de demanda.…”

Section: A Unidad De Generación Fotovoltaicaunclassified

Generador autoexcitado: operación en red aislada y sin almacenamiento energético

2021

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El presente artículo aborda el análisis y la simulación de un sistema de generación eléctrica basado en fuentes renovables, operando aislado y sin almacenamiento de energía. Inicialmente, se proponen estrategias de control individual para garantizar regulación en la tensión del bus DC. Para un sistema fotovoltaico, se considera la modificación de un algoritmo de seguimiento del punto de máxima potencia. Para un generador autoexcitado se construye una combinación de conversión mecánica a través de turbina, conversión electromecánica vía generador de inducción, rectificación trifásica y regulación de tensión vía lazo de control PI. A partir de ello, un control droop demuestra un apropiado reparto de potencias entre las diferentes unidades de generación. La topología de sistema propuesta es aplicable como solución de electrificación de bajo costo en zonas rurales de Colombia.

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“…Nonetheless, there is very limited literature that elaborates a clear step-by-step guide to choose appropriate passive element values for the filter, especially of the open-loop type. This paper presents the stepwise design procedure of an open-loop LCL filter for a grid-tied microinverter [12], [13]. The proposed design steps are based on the current ripple minimization approach.…”

Section: Introductionmentioning

confidence: 99%

LCL filter design for grid-connected single-phase flyback microinverter: a step by step guide

Yaakub

Radzi

Azri

et al. 2021

IJPEDS

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Recently, LCL has become amongst the most attractive filter used for grid-connected flyback inverters. Nonetheless, the switching of power devices in the inverter configuration creates harmonics that affect the end application behavior and might shorten its lifetime. Furthermore, the resonance frequencies produced by the LCL network contribute to the system instability. This paper proposes a step-by-step guide to designing an LCL filter by considering several key aspects such as the resonance frequency and maximum current ripple. A single-phase grid-connected flyback microinverter with an LCL filter was designed then constructed in the MATLAB/Simulink environment. Several different parameter variations and damping solutions were used to analyze the performance of the circuit. The simulation result shows a promising total harmonic distortion (THD) value below 5% and harmonic suppression up to 14%.

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Proportional-Resonant Controller And LCL Filter Design For Single-Phase Grid-Connected PV Micro-Inverters

Cited by 15 publications

References 9 publications

Analysis and design of photovoltaic three-phase grid-connected inverter using passivity-based control

Analysis and design of photovoltaic three-phase grid-connected inverter using passivity-based control

Generador autoexcitado: operación en red aislada y sin almacenamiento energético

LCL filter design for grid-connected single-phase flyback microinverter: a step by step guide

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