Five-Level Diode-Clamped Inverter With Three-Level Boost Converter

Abdullah, Raihanah; Rahim, Nasrudin Abd; Raihan, Siti Rohani Sheikh; Ahmad, Abu Zaharin

doi:10.1109/tie.2013.2297315

Cited by 90 publications

(37 citation statements)

References 40 publications

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“…DC link capacitor voltage balancing is major issue in multilevel diode clamped inverters. 30 In previous work, three-level boost converter and an extra balancing circuit is used to balance the capacitor voltages. However, additional switches, inductors, etc of balancing circuit make it difficult to control the system.…”

Section: Output Filter Capacitormentioning

confidence: 99%

Modular‐structured resonant converter for multilevel converters in micro grids

Reddy

Suryawanshi

Nachankar

et al. 2019

Circuit Theory & Apps

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In this work, an isolated modular resonant circuit with effective voltage regulation is presented as front-end for multilevel inverter system to interface renewable sources of energy with micro grid. Inputs of each module of the converter are connected to low-voltage DC sources. Modular-structured module outputs may be linked in sequence or parallel to attain the desired DC link capacitor voltage for multilevel inverter. The proposed converter overcomes imbalance in the capacitor voltage of diode-clamped inverter structure. Interleaved phase shift of 90 • is supplied among the gate pulses of all four modules that minimizes the input-side current ripples. An effective zero voltage switching (ZVS) is achieved over wide load range using duty cycle and frequency-duty cycle double control method to improve system performance at light load condition. Adopting powder core magnetics and low forward voltage insulated-gate bipolar transistors (IGBTs) reduces magnetic and conduction loss. A 12-kW prototype of the designed modular resonant converter was verified by experimentation with a different-level diode-clamped inverter structures. KEYWORDS high frequency (HF), insulated-gate bipolar transistor (IGBT), resonant converter, zero voltage switching (ZVS) wileyonlinelibrary.com/journal/cta

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Section: Output Filter Capacitormentioning

confidence: 99%

Modular‐structured resonant converter for multilevel converters in micro grids

Reddy

Suryawanshi

Nachankar

et al. 2019

Circuit Theory & Apps

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“…• A five-level diode-clamped converter [5], [14]- [17] which has a large number of clamping diodes. This converter has 36 diodes, 12 diodes in each phase.…”

Section: Introductionmentioning

confidence: 99%

A Novel Five-Level Voltage Source Inverter With Sinusoidal Pulse Width Modulator for Medium-Voltage Applications

Narimani

Zargari

2016

IEEE Trans. Power Electron.

126

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This paper proposes a new five-level voltage source inverter (VSI) for medium-voltage high-power applications. The proposed inverter is based on the upgrade of a four-level nested neutral-point clamped (NNPC) converter. This inverter can operate over a wide range of voltages without the need for connecting power semiconductor in series, has high quality output voltage and fewer components compared to other classic five-level topologies. The features and operation of the proposed converter are studied and a simple sinusoidal PWM scheme is developed to control and balance the flying capacitors to their desired values. The performance of the proposed converter is evaluated by simulation and experimental results. Index Terms-Multilevel converter, DC-AC power conversion, sinusoidal pulse width modulation (SPWM).Recently, a novel four-level nested neutral point clamped (NNPC) converter has been proposed in [21]. This topology has interesting properties such as operating over a wide range of voltages (2.4-7.2kV) without the need for connecting power semiconductor in series, all switches have the same voltage stress (equal to one third of the dc voltage), and fewer components compared to other classical four-level topologies. However, this topology is a four-level topology.

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“…The existing approaches for the capacitor voltage balancing of 5L-DCCs can be primarily divided into three categories: 1) utilizing redundant switching vectors with software implementations [5]- [10], 2) designing auxiliary balancing circuits with additional hardware costs [13]- [19], and 3) applying advanced techniques for the topology of back-to-back converters but not stand-alone 5L-DCCs [20]- [22]. The first category does not require additional hardware costs and thus receives much attention in the recent literature.…”

Section: Introductionmentioning

confidence: 99%

An Improved Capacitor Voltage-Balancing Method for Five-Level Diode-Clamped Converters With High Modulation Index and High Power Factor

Zhao

Huang

2016

IEEE Trans. Power Electron.

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The capacitor voltage imbalance is a critical issue of five-level diode-clamped converters (5L-DCC). To address this issue, an inner-hexagon-vector-decomposition based space vector modulation (VDSVM-H1) approach is provided in the literature, which obtains the capacitor voltage balancing with high modulation index and high power factor but renders some drawbacks. To overcome these shortcomings, a novel capacitor voltage balancing method is proposed here. First, the previous VDSVM-H1 approach is modified by introducing six new vector sequences to each triangle and applying a new vector selection rule such that the converter will not violate the 5L-DCC switching mechanism in all operating conditions. Second, the variation of the line-to-line voltage output in one sampling period is restricted to one-or two-level in the optimized region, instead of the three-level in the previous VDSVM-H1 approach, which means less harmonics generating in the ac-side outputs. Finally, the simulation and experimental results show that the proposed method can improve the VDSVM-H1 with convincing results.Index Terms-Capacitor voltage balancing, five-level diode clamped converter, high modulation index, high power factor, total harmonic distortion (THD). 0885-8993 (c)

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Five-Level Diode-Clamped Inverter With Three-Level Boost Converter

Cited by 90 publications

References 40 publications

Modular‐structured resonant converter for multilevel converters in micro grids

Modular‐structured resonant converter for multilevel converters in micro grids

A Novel Five-Level Voltage Source Inverter With Sinusoidal Pulse Width Modulator for Medium-Voltage Applications

An Improved Capacitor Voltage-Balancing Method for Five-Level Diode-Clamped Converters With High Modulation Index and High Power Factor

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