Mehdi Abapour

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In this paper, a diode-bridge-type nonsuperconductor fault current limiter (NSFCL) is proposed. The structure has the capability of controlling the DC reactor current that yields to control the magnitude of fault current. In order to control the magnitude of DC reactor current, a discharging resistor is used in the proposed structure. By controlling the(More)
In this paper, voltage sag compensation of point of common coupling (PCC) using a new structure of fault current limiter (FCL) is proposed. The proposed structure prevents voltage sag and phase-angle jump of the substation PCC after fault occurrence. This structure has a simple control method. Using the semiconductor switch (insulated-gate bipolar(More)
Obviously for the correct operation of conventional boost converters, all components should work correctly. Interleaved boost converters having several stages, can be used to increase the reliability. So in this paper, a reliability comparison is done between the conventional boost converter and the interleaved structure. Two different operation modes are(More)
Connection of new distributed generation (DG) to the existing distribution network increases the fault current and disturbs the existing distribution protection system. In this paper a solid state fault current limiter (SSFCL) application is proposed to minimize the effect of the DG on the distribution protection system in a radial system during a fault.(More)
The fault current levels through the breakers have a significant impact on failure probability of circuit breakers. With the expansion of the network, fault current levels increase and circuit breakers are subject to increasing duties and stresses, and are more tending to failures. Deferent method such as circuit breaker replacement proposed. In this paper(More)
A new method is proposed for inrush current reduction of under load transformers. The proposed limiter consists of a control-less diode-bridge and a single coil that connects in series with each-phase of transformer. It is necessary using three similar circuits for three-phase transformers. The limiter has almost no effect in normal operation of(More)
This paper presents an application of fuzzy control to determine the control signal of static var compensator (SVC) for reactive power compensation and power factor correction. Input signals for the FLC are chosen as load reactive power and initial firing angle of thyristors. The control signal is calculated using fuzzy membership functions. The(More)
In photovoltaic (PV) generation systems, dc-dc boost converters are responsible for maximum power point tracking and voltage regulation. The intent of this paper is to determine the number of the stages in an interleaved boost converter interfacing PV panels for achieving a reliable and costly optimized structure. A comparative study has been done on(More)
One of the main aims of distribution networks is increasing the participation of distributed generation. One of the methods that can determine the maximum penetration of DG in distribution network is use of active network management. Active network management has essential role to facilitate the connection of new generations without need of reinforcement(More)
A new topology for nonsuperconducting fault current limiter (NSFCL) based on multilevel switching strategy is proposed in this paper. The proposed multilevel NSFCL circuit aims to control the high-level fault current by inserting different resistances in the circuit. Due to interrupting the fault current based on multilevel switching strategy which results(More)