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The superconducting magnets, intended for use in the LHC High Luminosity (HL-LHC) project at CERN are based on Nb3Sn technology. Powering of prototypes of such magnets with up to tens of kilo-Amperes is required for detailed studies of the quench behavior as well as an evaluation of the associated magnet protection equipment. For this purpose an ultra-fast energy extraction system is needed in order...
In this paper, a hybrid DC circuit breaker based on natural Zero Current Switching for DC microgrid is proposed. In the DC networks, arc quenching is a dramatic challenge due to lack of zero crossing of current, which results in corrosion and reduction of circuit breaker lifetime. The hybrid circuit breaker conducts the current using a mechanical switch in normal condition. In fault condition, counter...
A modular multi-level converter (MMC) is composed of many sub-modules (SMs). Each SM needs a power supply to drive insulated-gate bipolar transistor (IGBT) and control power. The MMC system has a power of 100MW, a dc link voltage of 250kV, and a total of 125 SMs. This means that each SM has a rated input voltage of 2kV. This high input voltage should be converted to low load voltage by the power supply...
Transient thermal design is a key technology in miniaturization of switching power supply with intermittent operating mode or frequent overload condition. Based on capacitor charging power supply the transient thermal design technology was researched and the goal was to achieve the miniaturization of capacitor charging power supply. In the paper the losses of main heating devices were calculated and...
Looking at the near future, we see that offshore wind penetration into the electrical grid will continue increasing rapidly. Until very recently, the trend has been to place the offshore wind farms close to shore within the reach for transmission using HVAC cables but for larger distances HVDC solutions need to be considered. In the present work are presented methods to simulate the converter without...
The operation of PWM motor drives with long cables results in several undesired phenomena. In order to avoid them all, it was proposed in a previous work that the long cable be used to connect the rectifier to the inverter, which would then be placed beside the motor, thus establishing a DC line transmission. In the mentioned work, the additional benefit of the proposal, which is the reduction of...
Parasitic inductances are a major problem with power modules, in particular in fast switching applications. The parasitic inductance of the component interconnections causes an overvoltage condition and increases the switchoff losses in the semiconductor. Many initiatives have been investigated to reduce the parasitic inductance in power modules utilizing a complex mechanical construction of overlapping...
In many power electronic applications galvanic isolating IGBT/MOSFET drivers are advantageously used. The main reasons are safety issues, driving high voltage power semiconductors with blocking voltages of typically 600 V or above and avoiding or minimizing unwanted ground current loops. This paper deals with a new method for achieving galvanic isolation in high voltage drivers based on printed circuit...
Presented is a solid state high repetition-rate pulse generator with adjustable output amplitude, together with a resonant LC charger. This pulse generator was designed for transient plasma production for ignition and other aerospace plasma applications. The design of the pulse-forming network makes use of commercially available insulated gate bipolar transistors (IGBT) switching a capacitor bank...
The transient performance of 3-phase 4-wire self-excited induction generator (SEIG) feeding various types of linear and non-linear loads is analyzed in detail. The reactive power of SEIG and the load are being controlled by a 3-phase 4-wire configuration of static compensator (STATCOM). The STATCOM is an insulated gate bipolar transistor (IGBT) based, pulse width modulation (PWM) operated, four-leg...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
In order to increase the power density of power converters, reduction of the switching losses at a high-frequency switching condition is one of the most important issues. This paper presents a new gate drive circuit that enables to reduce the switching loss on both the power MOSFET and the IGBT. A distinctive feature of this method is that both the turn on loss and the turn off loss can be decreased...
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