Bahador Fani

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In this paper a new zero voltage switching flyback current-fed push-pull converter with an active circuit is proposed. The active clamp circuit not only absorbs the voltage surge across the switches at turn off instant, but also provides zero voltage switching condition for all switches. Main switches are controlled by PWM scheme and the auxiliary switches(More)
We propose a new scheme for transformer differential protection. This scheme uses different characteristics of the differential currents waveforms (DCWs) under internal fault and magnetizing inrush current conditions. The scheme is based on choosing an appropriate feature of the waveform and monitoring it during the post-disturbance instants. For this(More)
Flexible ac transmission systems (FACTS) controller can provide better control than conventional control and achieve fast control response time. Static synchronous compensator (STATCOM) is one of the key flexible ac transmission systems (FACTS) devices based on voltage source converter (VSC) technology. The controller can provide both capacitive and(More)
The main function of power system stabilizer (PSS) is suppressing the low-frequency oscillation of the power system to improve the dynamic stability of power system. In this paper, the pole-placement approach and full phase-compensation method are used to design the parameters of a derivative power system stabilizer (DPSS) base on electrical torque(More)
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