Microinverter Topology based Single-stage Grid-connected Photovoltaic System: A Review

Razi, Atikah; Hidayat, Muhamad Nabil; Seroji, Mohammad Nawawi

doi:10.11591/ijeecs.v11.i2.pp645-651

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…Consequently, a global MPPT system is not required, as each PV module is operating at its maximum power in an independent way. Micro-inverters can be classified into single-stage micro-inverters and two-stage microinverters [20]. Two stage micro-inverters consist of DC-DC converters to perform voltage boosting and MPPT extraction and DC-AC converter to convert the DC voltage into AC voltage, while single stage micro-inverters consist of only one stage that performs voltage boosting, MPPT tracking and converts the DC voltage into AC voltage.…”

Section: Introductionmentioning

confidence: 99%

A Phase-Shift-Modulated LLC-Resonant Micro-Inverter Based on Fixed Frequency Predictive-MPPT

et al. 2020

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Maximum Power Point Tracking (MPPT) control is an essential part of every photovoltaic (PV) system, in order to overcome any change in ambient environmental conditions and ensure operation at maximum power.. Recently, micro-inverters have gained a lot of attention due to their ability to track the true MPP for each individual PV module, which is considered a powerful solution to overcome the partial shading and power mismatch problems which exist in series-connected panels. Although the LLC resonant converter has high efficiency and high boosting ability, traditional MPPT techniques based on Pulse Width Modulation (PWM) do not work well with it. In this paper, a fixed frequency predictive MPPT technique is presented for the LLC resonant converter to be used as the first-stage in a PV micro-inverter. Using predictive control enhances the tracking efficiency and reduces the steady state oscillation. Operation with fixed switching frequency for the LLC resonant converter improves the total harmonic distortion profile of the system and ease the selection of circuit magnetic component. To demonstrate the effectiveness of the proposed MPPT technique, the system is simulated using MATLAB/Simulink platform. Furthermore, a 150 W hardware prototype is developed and tested. Both simulation and experimental results are consistent and validate the proper operation of the developed system.

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Section: Introductionmentioning

confidence: 99%

A Phase-Shift-Modulated LLC-Resonant Micro-Inverter Based on Fixed Frequency Predictive-MPPT

et al. 2020

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“…Two-stage Microinverter usually deal with power interface challenge between unstable DC-voltage source to stable high DC-voltage value before transforming into AC-voltage output [2,5,14]. Furthermore, two-stage Microinverter contains large number of components count [2,15,16], in order to realize converter and inverter power conversion stage which includes semiconductor devices, inductor, capacitor, and/or diode. Higher components count leads to higher switching losses and production/maintenance cost [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A novel single-stage PWM microinverter topology using two-power switches

Razi

Hidayat

Seroji

et al. 2020

IJPEDS

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This paper presents a novel single-stage Microinverter topology using only two-power switches. The number of components count are directly proportional to the power losses, weight, cost and complexity of the design. Nowadays, conventional Microinverter without transformer having minimum of six power switches, while only three power switches involved in a Microinverter structure with the presence of a transformer. Thus, this paper proposed a novel Microinverter topology with only two-power switches to convert DC-voltage from Photovoltaic (PV) module to an AC-output. Modes of operation and current flow during each cycle are being explained. Variation of modulation index, irradiance and temperature of the PV module, the switching frequency and harmonic content of the proposed Microinverter are being analysed. A simulated model of Microinverter topology, employed only two power switches with a standard Unipolar Sinusoidal Pulse Width Modulation (SPWM) having 0.85% harmonic percentage; able to inject current to the load; have been successfully built and demonstrated through simulation based on MATLAB/Simulink, thus provide theoretical validation for further research.

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“…There exist two ways of power processing, firstly two-stage conversion and secondly single stage conversion. Two-stage conversion with primarily DC-DC buck/boost conversion along with MPPT to trace the maximum power by varying the duty cycle next to an inverter to convert DC power into the required form of AC power through the DC link capacitor used to reduce the oscillations of present in DC link voltage [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

Control of Single Stage Grid Tied Photovoltaic Inverter Using Incremental Conductance Method

Reddy¹,

Reddy²,

Kumar³

2018

IJPEDS

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In this investigation, a study on grid-connected Photovoltaic (PV) system with single stage power conversion (SSPC) is proposed. Double Stage Power Conversion (DSPC) topology contains two power conversion stages namely DC-DC conversion and DC-AC conversion, but the SSPC system converts DC power to high-quality AC power supply for grid connected PV system. The SSPC system has several advantages over DSPC, such as better use of the PV arrays, higher efficiency, low cost and compact size. Present work proposes a Sinusoidal Pulse Width Modulation (SPWM) along with incremental conductance Maximum Power Point Tracking (IC-MPPT) for inverter switching. The PV voltage and Grid Voltages verifies under normal and change of atmospheric conditions using MATLAB / SIMULINK.

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Microinverter Topology based Single-stage Grid-connected Photovoltaic System: A Review

Cited by 5 publications

References 15 publications

A Phase-Shift-Modulated LLC-Resonant Micro-Inverter Based on Fixed Frequency Predictive-MPPT

A Phase-Shift-Modulated LLC-Resonant Micro-Inverter Based on Fixed Frequency Predictive-MPPT

A novel single-stage PWM microinverter topology using two-power switches

Control of Single Stage Grid Tied Photovoltaic Inverter Using Incremental Conductance Method

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