Nonlinear controller for maximum power extraction in asymmetric multilevel DC link reduced switch count inverter‐based grid connected PV system

Gowd, G. Eshwar; Sreenivasarao, Dharmavarapu

doi:10.1002/2050-7038.12206

Cited by 5 publications

(4 citation statements)

References 30 publications

(46 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PWM technique is classified as; n-phase disposition (IPD), Anti-phase disposition (APD), Carrier Overlap (CO) and Variable Frequency (VF) are used in MLI's [19][20][23][24]. The (n-l) carriers are used to match with the modulation signal in an n-level inverter, in MC-PWM [20,25].…”

Section: Pwm Modulation Techniquementioning

confidence: 99%

Design a Perturb & Observe MPPT Algorithm for PV System Based Asymmetric Cascaded HalfBridge Multilevel Inverter

Solangi¹

2020

IJST

View full text Add to dashboard Cite

Objectives/methods: This research proposes a Perturb and Observe (P&O) algorithm to extract maximum power point for photovoltaic (PV) system which then used as a direct current (DC) source for an asymmetrical cascaded half-bridge (ACHB) multilevel inverter (MLI). The whole system is modelled in MATLAB/SIMULINK. An approach is used to give input DC sources to asymmetrical cascaded halfbridge MVI with two PV systems. For PV system, a P&O maximum power point tracking (MPPT) algorithm is used to control the duty cycle of DC to DC boost converter for maintaining the constant output voltage. The switching pattern of MLI done by using pulse width modulation (PWM) technique. Findings: The proposed switching sample based on Multi Carrier (MC) PWM which reduces the voltage of components, decrease size, cost and also switching losses. ACHB MLI is attractive for its features as it gives higher level of output voltage by using fewer number of switching devices. Finally, two PV systems of different output voltages are integrated with asymmetrical cascaded half-bridge MVI. The results of the proposed model are verified in MATLAB/SIMULINK. Novelty: Dual P&O MPPT algorithms based PV system is used as input DC source for asymmetric cascaded half-bridge MLI which provides higher level output voltage as compared to conventional two-level inverter.

show abstract

Section: Pwm Modulation Techniquementioning

confidence: 99%

Design a Perturb & Observe MPPT Algorithm for PV System Based Asymmetric Cascaded HalfBridge Multilevel Inverter

Solangi¹

2020

IJST

View full text Add to dashboard Cite

show abstract

“…The authors had concluded that the DC grid has the advantages of simple construction and high reliability. The novel work of Reference 9 proposed a reduced switch count‐based multilevel inverter for integrating solar PV systems into the grid. The authors 10 developed a novel switching capacitor‐based multilevel inverter design that creates seven levels (7L) at the output voltage using just a single voltage source.…”

Section: Introductionmentioning

confidence: 99%

Gray wolf optimization‐based optimal grid connected solar photovoltaic system with enhanced power quality features

Nagadurga

Narasimham

Vakula

et al. 2021

Concurrency and Computation

View full text Add to dashboard Cite

In recent times, regional renewable energy sources (RES) are increasingly integrated with the existing electric power grid by onboarding certain superior power quality features, thereby helping them in meeting massive electrical demand. This grid integration drastically reduces the use of fossil fuels, besides preventing environmental hazards as well. However, in grid‐connected systems, with RES such as photovoltaic (PV) systems and wind energy systems, many power quality issues (PQ) still crop up. In this paper, Gray Wolf Optimization (GWO), in conjunction with a static synchronous compensator (STATCOM) is suggested to address such challenges in the RES integrated grid‐connected PV systems. The intermittent nature of solar PV power under shading conditions can be harnessed by using the GWO approach. STATCOM is one of many specialized power electronic devices that effectively reduce power quality concerns such as voltage sag/swell and Total Harmonic Distortions. The fast‐acting PI controller is intended to drive a STATCOM by using some tuned parameters for maintaining the DC link voltage as constant. The best findings are attained after these results are compared with PI. The test system is modeled using the MATLAB/Simulink environment.

show abstract

“…cascaded H bridge (CHB) MLIs require more number of isolated sources and switching components. To reduce the device count, various symmetrical and asymmetrical MLIs [1][2][3][4] are presented. However, the MLIs [1][2][3][4] are unable to provide voltage gain which is essential in PV and EV applications.…”

mentioning

confidence: 99%

“…To reduce the device count, various symmetrical and asymmetrical MLIs [1][2][3][4] are presented. However, the MLIs [1][2][3][4] are unable to provide voltage gain which is essential in PV and EV applications. In recent times, switched capacitor MLI (SCMLI) topologies are widely used due to their simple operation and voltage gain features.…”

mentioning

confidence: 99%

A new buck‐boost integrated multilevel inverter with reduced capacitors and capacitor size for low‐frequencyACapplications

Babu

Narasimharaju

Rathore

2021

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

This paper proposes a new buck-boost integrated multilevel inverter with reduced capacitors and capacitor size. The proposed multilevel inverter consists of a 5-level basic unit formed by two interleaved buck-boost converters, whose outputs are cascaded with the source to achieve a voltage gain of five. The capacitors present in the buck-boost converters are charged at the high switching frequency; therefore, the proposed multilevel inverter utilizes small capacitors compared to the existing switched capacitor multilevel inverter (SCMLI) topologies. Moreover, capacitors presented in the conventional SCMLI are limited to fixed voltage charging, whereas the capacitors of the proposed inverter can be charged to desired voltages by adjusting respective buck-boost converter duty cycles. Hence, the proposed inverter requires a relatively less number of compact capacitors to produce the higher number of voltage levels. In this paper, the design and operation of the proposed 11-level inverter are presented. A 500 W proof-of-concept is developed and the experimental results are presented for linear and nonlinear loads under static and dynamic load conditions. In addition, a comprehensive comparative study of the proposed inverter and the recent SCMLIs is presented.buck-boost integrated, multilevel inverter, step-up inverter, switched capacitor | INTRODUCTIONRecently, multilevel inverter (MLI) topologies became popular in various applications such as photovoltaic (PV) energy conversion, electric vehicles (EV), and power quality improvement, etc., over the conventional two-level inverters. The

show abstract

Nonlinear controller for maximum power extraction in asymmetric multilevel DC link reduced switch count inverter‐based grid connected PV system

Cited by 5 publications

References 30 publications

Design a Perturb & Observe MPPT Algorithm for PV System Based Asymmetric Cascaded HalfBridge Multilevel Inverter

Design a Perturb & Observe MPPT Algorithm for PV System Based Asymmetric Cascaded HalfBridge Multilevel Inverter

Gray wolf optimization‐based optimal grid connected solar photovoltaic system with enhanced power quality features

A new buck‐boost integrated multilevel inverter with reduced capacitors and capacitor size for low‐frequencyACapplications

Contact Info

Product

Resources

About