Pi Controlled DC-DC Converter Based on Three-State
... decreased switching losses obtained from a soft switching technique. As the power rating increases, it is often required to associate converters in series or in parallel. By using interleaving techniques in high current applications, the currents through the switches become just fractions of the inp ...
... decreased switching losses obtained from a soft switching technique. As the power rating increases, it is often required to associate converters in series or in parallel. By using interleaving techniques in high current applications, the currents through the switches become just fractions of the inp ...
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... direct frequency converter category. The output voltage is provided by direct switching of the input phases to the output phases. This means that the converter does not need a DC-link capacitor. The absence of a DC-link capacitor is one of the main advantages of the matrix converter. However it also ...
... direct frequency converter category. The output voltage is provided by direct switching of the input phases to the output phases. This means that the converter does not need a DC-link capacitor. The absence of a DC-link capacitor is one of the main advantages of the matrix converter. However it also ...
High Efficient Bidirectional Battery Converter for Residential PV Systems Cam Pham Tamas Kerekes
... characteristic of battery converter is the bidirectional of current flow. A. Boost-Buck converter (BBC) For non-isolated applications, the converter can be realised with MOSFET as shown in Fig. 3, where a boost converter can be seen from right to left and see from left to right, a buck converter can ...
... characteristic of battery converter is the bidirectional of current flow. A. Boost-Buck converter (BBC) For non-isolated applications, the converter can be realised with MOSFET as shown in Fig. 3, where a boost converter can be seen from right to left and see from left to right, a buck converter can ...
Как известно, основными техническими параметрами
... will be efficient at dwell-times of a fragment in the zone of corona discharge about 1 seconds. As the time of drift of a aerosols in an EP at a maximum charge is about 0,1 s an essential increase of value G can be reached only at the expense of decrease of charging time. We have found out, that an ...
... will be efficient at dwell-times of a fragment in the zone of corona discharge about 1 seconds. As the time of drift of a aerosols in an EP at a maximum charge is about 0,1 s an essential increase of value G can be reached only at the expense of decrease of charging time. We have found out, that an ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... compensating the electricity crisis. Standalone PV systems are extensively employed in the areas where power transmission through cables is practically not feasible. But for the sustainability of standalone systems, it is essential to choose suitable components as PV interface. For simplicity reason ...
... compensating the electricity crisis. Standalone PV systems are extensively employed in the areas where power transmission through cables is practically not feasible. But for the sustainability of standalone systems, it is essential to choose suitable components as PV interface. For simplicity reason ...
The Flyback Converter
... It has the advantage of very low Fig. 4. Flyback converter equivalent circuit model: (a) circuits corresponding to Eqs. (5), (7), and (9); (b) equivalent circuit parts count. Multiple outputs can containing ideal dc transformers. be obtained using a minimum number of parts: each additional output re ...
... It has the advantage of very low Fig. 4. Flyback converter equivalent circuit model: (a) circuits corresponding to Eqs. (5), (7), and (9); (b) equivalent circuit parts count. Multiple outputs can containing ideal dc transformers. be obtained using a minimum number of parts: each additional output re ...
Aalborg Universitet Multilevel Modular Converter for VSC-HVDC Transmission Applications: Control and
... A. Circuit Structure of Modular Multilevel Converter The basic building block of the MMC converter is the submodule shown in Fig. 1, which consists of two IGBT switches T1 and T2 and a capacitor C. In normal operation, exactly one switch (T1 or T2) is ON at any instant, giving a sub-module output vo ...
... A. Circuit Structure of Modular Multilevel Converter The basic building block of the MMC converter is the submodule shown in Fig. 1, which consists of two IGBT switches T1 and T2 and a capacitor C. In normal operation, exactly one switch (T1 or T2) is ON at any instant, giving a sub-module output vo ...
HVDC converter
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.