Ben-Gurion University of the Negev Research and Development Authority

Sami Shamoon College of Engineering (r.a.)

Alon Kuperman

Dmitry Baimel

The present invention provides topologies of phase-controlled IGBT bridge type and GTO bridge type Fault Current Limiter (FCL), which allow the precise limitation of fault currents to the desired values and can keep these values constant despite variations (dynamic behavior) of the fault currents. According to an embodiment of the invention, the topologies enable to use a phase control approach for optimal firing angles calculation. This control approach can be used in the proposed FCL topologies and other controlled bridge topologies such as SCRs bridge, GTO bridge, and IGBT/IGCT/Mosfet bridge topologies.

Phase-controlled IGBT bridge type, GTO bridge type, and hybrid IGBT/semi-passive, GTO/semi-passive types fault current limiters (FCLs)

A high-frequency resonant power conversion system for transferring power from an oscillator to a load or vice-versa, the system including components with at least one fluctuating parameter and is configured to control the value of a defined variable selected from: a certain current, a certain voltage, a phase difference between a certain voltage and a certain current, and a certain power; the system further including a virtual impedance creation loop which is configured to create a virtual component, the virtual component forming a basis for changing amplitude and a phase of the oscillator, thereby to compensate for a deviation from the controlled variable due to the fluctuations.

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Beer-Sheva, Israel

Alon Kuperman