Power Quality Performance Evaluation of Multilevel Inverter With Reduced Switching Devices and Minimum Standing Voltage

Bana, Prabhat Ranjan; Panda, Kaibalya Prasad; Panda, Gayadhar

doi:10.1109/tii.2019.2953071

Cited by 75 publications

(49 citation statements)

References 45 publications

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“…In this paper, SHE technique is used to synthesize the output voltage of MLIs [29]. By taking fourier series analysis, the staircase output voltage of RS MLI with nonequal DC sources can be expressed as mentioned below [6]:…”

Section: Selected Harmonic Elimination (She) Techniquementioning

confidence: 99%

“…Various conventional topologies of MLIs are used for conversion of DC to AC such as neutral point clamped MLI (NPC MLI), flying capacitor MLI (FC MLI) and cascaded H-bridge MLI (CHB MLI) [5,6]. NPC MLI requires more no.…”

Section: Introductionmentioning

confidence: 99%

“…SHE technique solves different non-linear equations and gives better optimal results for MLIs [6]. In the work reported in this present manuscript, the "selected harmonic elimination" (SHE) technique is used to reduce selected lower harmonics such as 5th and 7th from the voltage output of MLIs.…”

Section: Introductionmentioning

confidence: 99%

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Reduced switches multilevel inverter integration with boost converters in photovoltaic system

2019

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Multilevel inverters (MLIs) are developed to meet medium voltage and high power applications in flexible power systems. The conventional configuration of multilevel inverter requires more switches and has limitation to its wide range application. This paper reports the performed work on 1-phase 7-level reduced switch multilevel inverter (RS MLI) in photovoltaic (PV) system. RS MLI configuration integration with PV system which uses less number of switching components for specified number of voltage output levels as compared to that of conventional multilevel inverter topology. To performed enhanced operation of PV cells and maximize the solar energy extraction an incremental conductance based maximum power point tracking scheme is used. To improve the quality of RS MLI output parameters mainly total harmonic distortion and switching losses, selected harmonic elimination based genetic algorithm method is consider for control the gating pulse of PV based RS MLI. This work is performed using MATLAB/SIMULINK software. Keywords Reduced switch multilevel inverter (RS MLI) • Maximum power point tracking (MPPT) • Incremental conductance (IC) • Genetic algorithm (GA) • Total harmonic distortion (THD)

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Section: Selected Harmonic Elimination (She) Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reduced switches multilevel inverter integration with boost converters in photovoltaic system

2019

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“…Besides the above-discussed RSMLIs that address this issue, different types of level boosting circuits (LBCs) developed to optimize the MLI and addition, reduce the stress. In [3], [33]- [35], the introduced LBC doubles the number of levels and reduces the component count per level ratio (CLR). Almost all the above-cited MLIs formed by combining a low-frequency H-bridge as polarity generation unit and high-frequency level generation units.…”

Section: Introductionmentioning

confidence: 99%

Closed-Loop Control and Performance Evaluation of Reduced Part Count Multilevel Inverter Interfacing Grid-Connected PV System

et al. 2020

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Multilevel inverters (MLIs) have drawn tremendous attention in the power sector. Application of MLI has grown extensively to improve the power quality and efficiency of the photovoltaic (PV) system. For an MLI interfacing PV system, the size, cost and voltage stress are the key constraints of the MLI that need to be minimized. This paper presents a novel reduced part count MLI interfacing single-stage grid-tied PV system along with a closed-loop control strategy. The proposed MLI consists of n repeating units and a level boosting circuit (LBC) that assists in generating 4n + 7 voltage levels instead of 2n + 3 levels. Three different algorithms are proposed for a proper selection of dc-link voltages to enhance the levels further. A comparative analysis is carried out to confirm the superiority of the developed MLI. The workability of the proposed MLI is investigated with a 1.3 kW PV system. The closed-loop control strategy ensures the maximum power tracking, dc-link voltage balancing, satisfactory operation of the MLI and injection of clean sinusoidal grid current under any dynamic changes. Comprehensive simulation analysis is carried out considering a 15-level MLI structure. Experimental tests further confirm the practicality of the topological advancement for a PV system under different dynamic conditions. INDEX TERMS Asymmetrical repeating unit, distributed maximum power point tracking, multilevel inverter, photovoltaic (PV) system, reduced components.

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“…The input voltage is equally distributed among the capacitors, which appear across the load and consequently lack the ability to boost the output. The circuit proposed in [14]- [16] for the renewable energy application uses series diodes in the conduction path. Thus, their operation in highly inductive loads is unfeasible.…”

mentioning

confidence: 99%

A Single-Source Switched-Capacitor-Based Step-Up Multilevel Inverter With Reduced Components

Panda

Bana

Kiselychnyk

et al. 2021

IEEE Trans. on Ind. Applicat.

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Switched-capacitor-based multilevel inverters (SC MLIs) have received a great deal of interest that reduces the dc source requirement and improves the power quality. However, multiple dc sources and the requirement of a large number of switches to generate a high-quality boost output are the fundamental issues in the SC MLIs. This article presents a step-up 17-level SC MLI using reduced number of switches, three capacitors, and a single dc source. The steady-state voltage across the capacitors is maintained in the ratio 1:2:0.5 that contributes to quadruple boosting ability without using any auxiliary capacitor voltage balancing circuit. Besides, lower switch count in the conduction path and operation of 50% of the switches at fundamental frequency ensures total power loss reduction in the proposed circuit. A comparative assessment with recently developed 17-level MLIs in terms of the number of components, gain, stress, and cost factor elucidates the advantages of the proposed MLI. After a detailed circuit analysis and loss evaluation, simulations are performed to verify the step-up and inherent balancing features of the proposed MLI. Further, using both the fundamental frequency and high-frequency switching techniques, extensive experimental test results are presented under different transient conditions to validate the operational feasibility of the 17-level prototype. Index Terms-Multilevel inverter (MLI), reduced components, self-voltage balance, single-source, switched-capacitor (SC), voltage gain. I. INTRODUCTION D EVELOPMENT of multilevel inverters (MLIs) has been a recent trend for a variety of low-, medium-, and highpower applications [1]-[5].

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Power Quality Performance Evaluation of Multilevel Inverter With Reduced Switching Devices and Minimum Standing Voltage

Cited by 75 publications

References 45 publications

Reduced switches multilevel inverter integration with boost converters in photovoltaic system

Reduced switches multilevel inverter integration with boost converters in photovoltaic system

Closed-Loop Control and Performance Evaluation of Reduced Part Count Multilevel Inverter Interfacing Grid-Connected PV System

A Single-Source Switched-Capacitor-Based Step-Up Multilevel Inverter With Reduced Components

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