The comparative analysis of multicarrier control techniques for SPWM controlled cascaded H-bridge multilevel inverter

Grounding systems are able to provide necessary safety for electrical equipment under lightning. However, these systems will be negatively affected by external factors such as climate changes and technical requirements for photovoltaic and wind systems in the future. In order to prevent negative effects on the system created by high voltage leaking, grounding resistance has to be checked periodically. High voltages on the electrical devices can cause possible intolerable problems when periodic checking is ignored. This study constitutes an important area in safety standards and applications. The purpose of this study is to measure the grounding resistance at short periods of time continuously to keep it constant at certain value. Hence, obtained grounding resistance value based on grounding standards on power plants is preserved. Moreover, necessary protection for Photo voltaic systems, people and equipment is provided automatically. Finally, experimental results show that the grounding resistance is monitored and kept as constant by the system designed.

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“…Different types of switching methods are used for control inverters [22]. In this study, sinusoidal PWM (Pulse Width Modulation) method is used.…”

Section: A Hardware Implementationmentioning

confidence: 99%

An application of maintaining constant grounding resistance of renewable energy sources by using a dspic

Çolak

Garip²,

Issi

2014

2014 Ninth International Conference on Ecological Vehicles and Renewable Energies (EVER)

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“…Figure (c) shows the common emitter structure. The advantage of this structure over the previous one is that each bidirectional switch needs one gate driver . Hence, we use this structure for the switch S 1 .…”

Section: Proposed Topologiesmentioning

confidence: 99%

A new cascade boost inverter for photovoltaic applications with minimum number of elements

Alishah

Barzegar

Nazarpour

2014

Int. Trans. Electr. Energ. Syst.

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Summary Photovoltaic systems consist of a DC‐DC converter that can track the peak power operating point and a DC‐AC inverter to deliver the active power into the utility. In this paper, a novel cascade boost inverter for photovoltaic application is presented which requires fewer number of power electronic elements. The number of required switches and gate driver circuits against required output voltage levels is a very important factor in designing of an inverter because switches define the circuit size, reliability, losses, costs and control complexity. The comparison of the proposed structure with other new structures and classical multilevel inverters is presented to reflect the merits of the presented structure. The operation of the proposed inverter is analyzed with the experimental and simulation results for different topologies. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Since APOD and POD schemes in case of three level inverter are the same, a seven level inverter is considered to discuss about the APOD PWM scheme [8]. When the number of levelsn = 7, there are n -1 = 6 carrier waveforms arranged so that every carrier waveform is in out of phase with its neighbor carrier by 180.The converter switches to + V dc when the reference is greater than all the carrier waveforms.…”

Section: Alternate Phase Opposition Disposition (Apod) Strategymentioning

confidence: 99%

“…Hence they are said to be AMLIs [10]. A seven level output voltage is achieved with two bridges in asymmetrical inverter whereas only five level output voltage will be achieved with two such bridges in case of conventional cascaded MLI [8]. In AMLI more voltage levels can be achieved with lesser number switches.Figure1 shows the chosen asymmetrical three phase inverter.…”

Section: Three Phase Asymmetrical Multi Level Inverter (Amli) Figure mentioning

confidence: 99%

“…Tolbert et al [7] explored the benefits and discussed control schemes of the cascade inverter for use as an Electric Vehicle (EV) motor drive or a parallel Hybrid Electric Vehicle (HEV) drive and the diode-clamped inverter as a series HEV motor drive. Josh and Jerome [8]have stated that the power quality improvement can be achieved by reducing the harmonics at the output voltage of the inverter. Colak et al [9] have done intensive studies and have proposed carrier based sinusoidal space vector and sigma delta PWM methods in open loop control of inverters.…”

Section: Introductionmentioning

confidence: 99%

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A New Three Phase Seven Level Asymmetrical Inverter with Hybrid Carrier and Stepped Reference

Uthayakumar¹,

Natarajan²,

Bensraj³

2013

IJCA

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The comparative analysis of multicarrier control techniques for SPWM controlled cascaded H-bridge multilevel inverter

Cited by 14 publications

References 9 publications

An application of maintaining constant grounding resistance of renewable energy sources by using a dspic

An application of maintaining constant grounding resistance of renewable energy sources by using a dspic

A new cascade boost inverter for photovoltaic applications with minimum number of elements

A New Three Phase Seven Level Asymmetrical Inverter with Hybrid Carrier and Stepped Reference

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