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With the increases in demand of energy, the non renewable energy sources have depleted and also there is a concern of global warming with the use of non renewable source of energy. So there arises a need to find new energy resources which are in bulk and also does not affect the environment. Solar is one of the best solution among all the renewable source of energy available today. Nowadays photovoltaic...
This paper investigates the operation of an active filter configuration to eliminate the dominant harmonics from a low frequency (50 Hz) square wave Voltage Source Inverter (VSI). VSIs are playing a vital in industry for medium voltage high power drive applications. For high power drives the inverter switching frequency should be less to minimize the switching losses of power semiconductor devices...
Battery energy storage system(BESS) connected to the grid by power conversion system(PCS). Currently Cascaded Multilevel Converter(CMC) and Modular Multilevel Converter (MMC) are two more advanced topologies for PCS. This paper compares CMC and MMC topologies in aspects of efficiency, harmonic characteristics, reliability, control system complexity and cost, the simulation results are presented. Suggestions...
Single-phase grid-connected inverter (GCI) is a kind of single-phase voltage source converter (VSC), and as the indispensable tie unit between different power supplies, it is widely used in the fields of wind generation and solar PV generation. In the paper, as first, on the basis of the concept of the discontinuous pulse-width modulation (DPWM) for three-phase VSI, a new DPWM of single-phase GCI...
When power frequency alternating voltage was used to heat soybean milk, electrode surface was corroded. Aiming at this problem, a high frequency and high power supply based on ARM microprocessor was designed. This power supply consists of ARM microprocessor, human-computer interaction interface, direct current power module, inverter device and data acquisition device. And it could change direct voltage...
The desaturation and charge recovery behavior for 1200-V RC-IGBTs with diode control is investigated. The low thickness of the drift-region of modern 1200-V IGBTs results in significantly reduced time constants of the diode-control feature. While a low desaturation time constant is well acceptable, the recovery time constant becomes critical when compared to typical locking time requirements of common...
A Reverse Conducting IGBT (RC-IGBT) is a promising device to reduce a size and cost of the power module thanks to the integration of IGBT and FWD into a single chip. However, it is difficult to achieve well-balanced performance between IGBT and FWD. Indeed, the total inverter loss of the conventional RC-IGBT was not so small as the individual IGBT and FWD pair. To minimize the loss, the most important...
Various soft switching inverter topologies have been reported in the literature with the aims of reducing the switching losses and dynamic switching stress. However, lower losses are generally regarded as one of the most significant advantages of the emerging silicon carbide semiconductor devices over the conventional silicon devices. Both routes seem viable to improve the converter efficiency. To...
In this paper, a novel twenty-one level inverter unit is proposed. Using this, the cascaded multilevel inverter topology is suggested to achieve the higher number of output levels. The cascaded topology is constructed by the series connection of the twenty-one level basic unit. The topology is created in such a way that more levels can be added without modifying the existing circuit. The proposed...
A modular, multi-port converter configuration realizes DC-AC conversion for a high-power grid-connected photovoltaic system; but one or more faults can occur in any of the highly numerous components. In this paper, a reconfigurable multi-port control is proposed to achieve fault detection and resolution among cascaded ports. A series of switching algorithms are applied, thus enabling a continued operation...
This paper presents a simulation of wind turbine driven by a Doubly-Fed Induction Generator (DFIG), the rotor is fed through a two level inverter using Space Vectors Pulse Width Modulation (SVM). LabVIEW and Multisim are used to co-simulate the control and power electronics steps respectively. The thermal models of Multisim are used in order to analyze the thermal performance of IGBTs under different...
The number of ac drives present in the power systems of most industrial facilities has shown a significant increase in the past 3 decades, taking an important percentage of the total power demand. Two options to produce energy savings on these drives is the use of an optimized flux level, and the operation with reduced switching frequency. Paper reports the development of a complete loss model for...
This paper presents a control process and the functioning of Modular Multilevel Converter (MMC) in high-voltage DC transmission system. A new algorithm is proposed to generate gate pulses of the switching devices for running, shifting the system from higher to any other lower level or any other lower level to higher level of operation, which is based on Carrier and Signal (reference) Magnitude Control...
This paper contains simulations of a six-pulse Induction Furnace with 500 Hz output frequency and 500V output voltage. Comparison of thyristor based inverter and IGBT based inverter shown in the paper, and simulation of IGBT based inverter is shown because it has higher efficiency, faster switching. Rectifier section is diode based for the simplicity constrain. The model of the induction furnace was...
This paper presents the modeling & simulation of 100 KW grid connected Solar Power Plant on MATLAB. The renewable energy sources such as the solar and wind offers clean, green and abundant energy. As the power demand increasing the power failure also increases so that the renewable energy can be used to provide the constant load demand continuously. Due to environmental condition PV array is influenced...
This paper presents a novel generalized topology of a multilevel inverter. The proposed topology is obtained by extending the developed H-bridge topology. The proposed topology is competent to generate the optimum number of output voltage levels by using minimum number of dc voltage sources. The topology offers reduced value of voltage stress on semiconductor power switches. Utilization of dc voltage...
In the light of rapid developments in electric vehicles, it has raised a concern on the functional safety of inverters. Overcurrent is a common fault in the inverter, which could not only damage the inverter but also be hazardous to drivers and passengers due to unintended motive power loss on the road. Hence, an overcurrent protection design in an inverter is highly needed. In this study, the failure...
This paper presents a new power semiconductor IGBT module family dedicated for Electric Vehicle (EV) and Hybrid Electric Vehicle (HEV) power-train inverter applications, especially for higher power requirements. The new IGBT module family adopts a 6-in-1 circuit configuration with an optimized internal layout, Direct Lead Bond (DLB) structure and an integrated Al fin for direct liquid cooling. As...
This paper presents a comparative evaluation of the loss and thermal performance of two advanced three-level inverter topologies, namely the SiC based T-Type and the Hybrid-NPC, both of which are aimed at reducing the high switching losses associated with a conventional Si based T-Type inverter. The first solution directly replaces the 1200V primary Si IGBT switches with lower loss 1200V SiC MOSFETs...
Reliability of multilevel power converters has received increased attention over the past few years, due to the relatively high component failure probability caused by the large number of switching devices utilized in the converter topologies. Thus, the fault-tolerant operation of multilevel converters plays an essential role in safety-critical industrial applications. This paper introduces an improved...
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