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New Double Input DC-DC Converters for
... an energy storage unit comprising both batteries and ultracapacitor seem to be the promising choice for the future vehicles [1]. The basic idea is to realize advantages of both batteries and ultracapacitors while keeping the weight of the entire energy storage unit minimized through an appropriate m ...
... an energy storage unit comprising both batteries and ultracapacitor seem to be the promising choice for the future vehicles [1]. The basic idea is to realize advantages of both batteries and ultracapacitors while keeping the weight of the entire energy storage unit minimized through an appropriate m ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331
... compared with those obtained through simulation. The results obtained validate the strategy developed. Power factor of this single phase matrix converter improved by controlling the ON and OFF time period of IGBT switches and controlling PWM switching period with help of FPGA and Xilinx 13.2 Softwar ...
... compared with those obtained through simulation. The results obtained validate the strategy developed. Power factor of this single phase matrix converter improved by controlling the ON and OFF time period of IGBT switches and controlling PWM switching period with help of FPGA and Xilinx 13.2 Softwar ...
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... Abstract— D.C. motors are seldom used in ordinary applications because all electric supply companies furnish alternating current. However, for special applications such as in steel mills, mines and electric trains, it is advantageous to convert low value of DC into high value of DC in order to use D ...
... Abstract— D.C. motors are seldom used in ordinary applications because all electric supply companies furnish alternating current. However, for special applications such as in steel mills, mines and electric trains, it is advantageous to convert low value of DC into high value of DC in order to use D ...
DC – DC CONVERTER 1000W 100 - 400VDC Input / 12VDC Output
... possible to choose to supply the coil by a pull-up or pull-down system because this input is totally insulated between other electrical potentials. It is possible to drive the relay with an higher voltage signal by connecting a Ω impedance so on calculate resistor in series to the coil: the coil has ...
... possible to choose to supply the coil by a pull-up or pull-down system because this input is totally insulated between other electrical potentials. It is possible to drive the relay with an higher voltage signal by connecting a Ω impedance so on calculate resistor in series to the coil: the coil has ...
Modeling and Control of Renewable Source Boost Converter using
... The boost converter should always maintain constant voltage with variations in the input parameters. In order to maintain a stable output in the converter, an appropriate control signal should be applied. In practice the switching network is highly non-linear. An accurate mathematical modeling of th ...
... The boost converter should always maintain constant voltage with variations in the input parameters. In order to maintain a stable output in the converter, an appropriate control signal should be applied. In practice the switching network is highly non-linear. An accurate mathematical modeling of th ...
dcLFL Line Fault Location System
... one cubicle at each end of the transmission line. The technology consists of computer-based master stations, GPS timing units, custom wavefront detection electronics, and fibre optic transmitters. When a line fault occurs, the resulting wavefront propagates in both directions from the fault. Upon re ...
... one cubicle at each end of the transmission line. The technology consists of computer-based master stations, GPS timing units, custom wavefront detection electronics, and fibre optic transmitters. When a line fault occurs, the resulting wavefront propagates in both directions from the fault. Upon re ...
HVDC converter
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An HVDC converter converts electric power from high voltage alternating current (AC) to high-voltage direct current (HVDC), or vice versa. HVDC is used as an alternative to AC for transmitting electrical energy over long distances or between AC power systems of different frequencies. HVDC converters capable of converting up to two gigawatts (GW) and with voltage ratings of up to 900 kilovolts (kV) have been built, and even higher ratings are technically feasible. A complete converter station may contain several such converters in series and/or parallel.Almost all HVDC converters are inherently bi-directional; they can convert either from AC to DC (rectification) or from DC to AC (inversion). A complete HVDC system always includes at least one converter operating as a rectifier (converting AC to DC) and at least one operating as an inverter (converting DC to AC). Some HVDC systems take full advantage of this bi-directional property (for example, those designed for cross-border power trading, such as the Cross-Channel link between England and France). Others, for example those designed to export power from a remote power station such as the Itaipu scheme in Brazil, may be optimised for power flow in only one preferred direction. In such schemes, power flow in the non-preferred direction may have a reduced capacity or poorer efficiency.HVDC converters can take several different forms. Early HVDC systems, built until the 1930s, were effectively rotary converters and used electromechanical conversion with motor-generator sets connected in series on the DC side and in parallel on the AC side. However, all HVDC systems built since the 1940s have used electronic (static) converters.Electronic converters for HVDC are divided into two main categories. Line-commutated converters(HVDC classic) are made with electronic switches that can only be turned on. Voltage-sourced converters(HVDC light) are made with switching devices that can be turned both on and off. Line-commutated converters (LCC) used mercury-arc valves until the 1970s, or thyristors from the 1970s to the present day. Voltage-source converters (VSC), which first appeared in HVDC in 1997, use transistors, usually the Insulated-gate bipolar transistor (IGBT).As of 2012, both the line-commutated and voltage-source technologies are important, with line-commutated converters used mainly where very high capacity and efficiency are needed, and voltage-source converters used mainly for interconnecting weak AC systems, for connecting large-scale wind power to the grid or for HVDC interconnections that are likely to be expanded to become Multi-terminal HVDC systems in future. The market for voltage-source converter HVDC is growing fast, driven partly by the surge in investment in offshore wind power, with one particular type of converter, the Modular Multi-Level Converter (MMC) emerging as a front-runner.