A transformerless five level cascaded inverter based single phase photovoltaic system

Calais, Martina; Agelidis, Vassilios G.; Borle, L.J.; Dymond, M.S.

doi:10.1109/pesc.2000.880477

Cited by 54 publications

(21 citation statements)

References 6 publications

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“…2 will be referred to as a Cascade-3/3H inverter. This is the topology originally patented by Robicon [6] and is a popular power converter for motor drives [6], [9], [15], [18], power supplies [7], [13], [17], and ac power systems [8], [11], [12], [14], [16]. In terms of the general mathematical description, it can be noted that , and .…”

Section: Generalized Cascaded Topologymentioning

confidence: 99%

“…The main disadvantage of this topology is that each H-bridge cell requires an isolated dc source. The isolated sources are typically provided from a transformer/rectifier arrangement [6], but may be supplied from batteries, capacitors [8] or photovoltaic arrays [17]. This topology was recently patented by Robicon Group in 1996 [6] and is one of the companies standard drive products.…”

Section: Introductionmentioning

confidence: 99%

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A new cascaded multilevel H-bridge drive

Corzine

Familiant

2002

IEEE Trans. Power Electron.

333

114

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In this paper, a general structure for cascaded power converters is presented in which any number of H-bridge cells having any number of voltage levels are series connected to form an inverter phase leg. Equations are introduced for determining an optimal voltage ratio of dc voltages for the H-bridge cells which will maximize the number of voltage levels obtainable resulting in high power quality. Special cases of the generalized inverter are presented including novel 11-level and 15-level inverters. Laboratory measurements demonstrate the proposed inverter performance.

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Section: Generalized Cascaded Topologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new cascaded multilevel H-bridge drive

Corzine

Familiant

2002

IEEE Trans. Power Electron.

333

114

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“…Calais [9] have described an overview of different multilevel topologies and investigated their suitability for single-phase grid connected photovoltaic systems regarding issues such as component count and stress, system power rating and the influence of the photovoltaic array earth capacitance. Calais and Agelidis [10,19] have developed Unipolar SPWM full-bridge with transformer less grid connected inverter, a lot of depth researches, where new freewheeling paths are constructed to separate the PV array from the grid in the freewheeling period.…”

Section: Introductionmentioning

confidence: 99%

Cascaded H-Bridge Five Level Inverter for Grid Connected PV System using PID Controller

Sivagamasundari¹,

Mary²

2016

JSTS:Journal of Semiconductor Technology and Science

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Abstract-Photovoltaic energy conversion becomes main focus of many researches due to its promising potential as source for future electricity and has many advantages than the other alternative energy sources like wind, solar, ocean, biomass, geothermal etc. In Photovoltaic power generation multilevel inverters play a vital role in power conversion. The three different topologies, diode-clamped (neutral-point clamped)inverter, capacitor-clamped (flying capacitor) inverter and cascaded h-bridge multilevel inverter are widely used in these multilevel inverters. Among the three topologies, cascaded h-bridge multilevel inverter is more suitable for photovoltaic applications since each pv array can act as a separate dc source for each h-bridge module. This paper presents a single phase Cascaded H-bridge five level inverter for grid-connected photovoltaic application using sinusoidal pulse width modulation technique. This inverter output voltage waveform reduces the harmonics in the generated current and the filtering effort at the input. The control strategy allows the independent control of each dc-link voltages and tracks the maximum power point of PV strings. This topology can inject to the grid sinusoidal input currents with unity power factor and achieves low harmonic distortion. A PID control algorithm is implemented in Arm Processor LPC2148. The validity of the proposed inverter is verified through simulation and is implemented in a single phase 100W prototype. The results of hardware are compared with simulation results. The proposed system offers improved performance over conventional three level inverter in terms of THD.Index Terms-Multilevel inverter, cascaded H-bridge multilevel inverter, total harmonic distortion, sinusoidal pulse width modulation, MATLAB, PID controller

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“…However, this method increases the complexity of the circuit and losses. In articles [3] and [6] a cascade structure is employed to increase the dc voltage, which needs more power switches and still results in a complex circuit. In article [7], a current source inverter (CSI) employing a large inductor is used for power conversion.…”

Section: Introductionmentioning

confidence: 99%