A Novel Six-Level Inverter Topology for Medium-Voltage Applications

Le, Quoc Anh; Lee, Dong-Choon

doi:10.1109/tie.2016.2547909

Cited by 85 publications

(29 citation statements)

References 30 publications

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“…Like this, the topology of NPC, the topology of the FC is too inadequate for MV and HV applications because it uses a large number of condensers requiring circuits for prior charging and balancing [9], [11]. Furthermore, a large dc link capacitor needs for single cell topology, limits its application to medium and high voltages, particularly to solar PV applications, where different PV panels is to be connected in series [12], [13]. These huge number of series connected PV panels will decrease the overall system efficiency due to common MPPT and series resistance [14].…”

Section: Developments In DC To Ac Power Converter Topologiesmentioning

confidence: 99%

“…However, it requires a two-stage transfer of energy, which increases the loss. Few common mode grounding topologies in single phase transformer-less inverters are shown in figure (13). (c) Fig.13.Single-phase common mode transformer less inverter (a) Topology in [36] (b) Topology in [37] (c) Topology in [38] In perspective of the constraints in the above topologies [36], [37] & [38], a novel flying capacitor topology is proposed in [39] with charging and discharge schemes.…”

Section: Fig7 Modified Z-source Inverter Topologymentioning

confidence: 99%

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Technological Developments in Direct Grid Connected Power Converters for Solar PV Power Plants

Kumar¹,

Ganesh²

2019

IJEAT

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Most of the countries in the world are concentrating on renewable energy generation, due to day-day increase in population increasing the energy demand, also to make their environment sustainable. With the many of features, use of megawatts rating solar photovoltaic (PV) power plants are becoming more popular for upgrading the existing power generation throughout the world. Moreover, among the existing renewable energy generations, solar power is the primary choice to meet the rapidly increasing demands; since solar PV plant installing time is relatively quick, say about in 3- 4 months, compared to conventional (thermal, hydro & diesel) plants which may require about 3-4 years. The low voltage (270‒700V) power converters require a filter and a step-up transformer for interconnecting the local grids with solar PV power plants. The advances in power converters without transformers and filters have recently become more attractive for solar PV power plants connected directly to grid. The study of this article describes the essential requirement and the technological developments in the design of power electronics converters, together with their modulation schemes to integrate solar power directly with standard power grid. This article, review ongoing research activities and the probable directions for the future research in developing inverters for cost-efficient grid connected solar PV plants

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Section: Developments In DC To Ac Power Converter Topologiesmentioning

confidence: 99%

Section: Fig7 Modified Z-source Inverter Topologymentioning

confidence: 99%

Technological Developments in Direct Grid Connected Power Converters for Solar PV Power Plants

Kumar¹,

Ganesh²

2019

IJEAT

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“…The proposed topology substitutes all the separate dc voltage sources with capacitors, as compared with the conventional cascaded multilevel inverter. In [22], a new topology of six-level inverter is proposed. It consists of flying capacitor inverter units inside and two-level inverter units outside.…”

Section: Related Workmentioning

confidence: 99%

Novel Basic Block of Multilevel Inverter Using Reduced Number of On-State Switches and Cascaded Circuit Topology

Prayag

Bodkhe²

2017

Advances in Electrical Engineering

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In this paper a basic block of novel topology of multilevel inverter is proposed. The proposed approach significantly requires reduced number of dc voltage sources and power switches to attain maximum number of output voltage levels. By connecting basic blocks in series a cascaded multilevel topology is developed. Each block itself is also a multilevel inverter. Analysis of proposed topology is carried out in symmetric as well as asymmetric operating modes. The topology is investigated through computer simulation using MATLAB/Simulink and validated experimentally on prototype in the laboratory.

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“…However, it demands more independent DC sources for higher voltage levels. Therefore, in the recent literature, [7][8][9][10][11][12][13][14][15] several new MLI topologies are reported with a reduced component count, novel voltage balancing methods, and the reduced number of independent DC sources in comparison with the aforesaid conventional topologies. The topology proposed in Babaei et al 7 can produce a seven-level output with reduced component count as compared with CHB, but it has no common DC-link to operate for three phases.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a modified 5-L hybrid inverter topology that is referred to as 5-L HFC was proposed in Dao and Lee, 16 which is similar to Le and Lee. 15 More conducting devices, complex control, and additional need for FCs increase the size and cost with a reduction in the efficiency of the system. Moreover, the requirement of a voltage sensing device in each phase of Le and Lee 15 and Dao and Lee 16 limits their applicability for a cost-effective prototype.…”

Section: Introductionmentioning

confidence: 99%

A three‐phase inverter circuit using half‐bridge cells and T‐NPC for medium‐voltage applications

Tirupathi

Kirubakaran

Tirumala

2020

Circuit Theory & Apps

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Three-phase single DC-source based multilevel inverter topologies play a pivotal role in industrial applications due to the reduced number of components and higher efficiency. This paper emphasizes the inverter for medium-voltage applications that employ a conventional three-phase T-type structure (T-NPC). The primary circuit of the proposed configuration consists of a T-NPC structure connected to the half-bridge cells at the top and the bottom sides of each phase. The secondary circuit consists of DC-link capacitors whose voltage balancing is attained through a separate voltage balancing circuit (VBC). Using the proposed configuration, the number of components and independent DC supplies are reduced compared with the conventional topologies such as a neutral point clamped (NPC) inverter, a flying capacitor (FC) inverter, and a cascaded H-bridge (CHB) inverter for the same number of output voltage levels. Hence, the proposed topology results in the reduction of weight, volume, and power losses of the inverter. A sine-triangle comparison method is employed in the field programmable gate array (FPGA) platform to generate the firing pulses of the circuit switches. The effectiveness of the proposed topology is verified with simulation studies and is experimentally validated with a scaleddown prototype.

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A Novel Six-Level Inverter Topology for Medium-Voltage Applications

Cited by 85 publications

References 30 publications

Technological Developments in Direct Grid Connected Power Converters for Solar PV Power Plants

Technological Developments in Direct Grid Connected Power Converters for Solar PV Power Plants

Novel Basic Block of Multilevel Inverter Using Reduced Number of On-State Switches and Cascaded Circuit Topology

A three‐phase inverter circuit using half‐bridge cells and T‐NPC for medium‐voltage applications

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