Browsing by Author "Radmanesh, Hamid"

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    A Compound Current Limiter and Circuit Breaker
    (MDPI AG, 2019-05-01) Heidary, Amir; Radmanesh, Hamid; Bakhshi, Ali; Rouzbehi, Kumars; Pouresmaeil, Edris; Department of Electrical Engineering and Automation; Renewable Energies for Power Systems; Amirkabir University of Technology; Shahid Sattari University of Aeronautical Engineering; University of Seville
    The protection of sensitive loads against voltage drop is a concern for the power system. A fast fault current limiter and circuit breaker can be a solution for rapid voltage recovery of sensitive loads. This paper proposes a compound type of current limiter and circuit breaker (CLCB) which can limit fault current and fast break to adjust voltage sags at the protected buses. In addition, it can act as a circuit breaker to open the faulty line. The proposed CLCB is based on a series L-C resonance, which contains a resonant transformer and a series capacitor bank. Moreover, the CLCB includes two anti-parallel power electronic switches (a diode and an IGBT) connected in series with bus couplers. In order to perform an analysis of CLCB performance, the proposed structure was simulated using MATLAB. In addition, an experimental prototype was built, tested, and the experimental results were reported. Comparisons show that experimental results were in fair agreement with the simulation results and confirm CLCB’s ability to act as a fault current limiter and a circuit breaker.
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    A Multi-Inductor H Bridge Fault Current Limiter
    (MDPI AG, 2019-07-16) Heidary, Amir; Radmanesh, Hamid; Moghim, Ali; Ghorbanyan, Kamran; Rouzbehi, Kumars; Rodrigues, Eduardo M.G.; Pouresmaeil, Edris; Department of Electrical Engineering and Automation; Renewable Energies for Power Systems; Amirkabir University of Technology; Shahid Sattari University of Aeronautical Engineering; University of Seville; University of Aveiro
    Current power systems will suffer from increasing pressure as a result of an upsurge in demand and will experience an ever-growing penetration of distributed power generation, which are factors that will contribute to a higher of incidence fault current levels. Fault current limiters (FCLs) are key power electronic devices. They are able to limit the prospective fault current without completely disconnecting in cases in which a fault occurs, for instance, in a power transmission grid. This paper proposes a new type of FCL capable of fault current limiting in two steps. In this way, the FCLs’ power electronic switches experience significantly less stress and their overall performance will significantly increase. The proposed device is essentially a controllable H bridge type fault current limiter (HBFCL) that is comprised of two variable inductances, which operate to reduce current of main switch in the first stage of current limiting. In the next step, the main switch can limit the fault current while it becomes open. Simulation studies are carried out using MATLAB and its prototype setup is built and tested. The comparison of experimental and simulation results indicates that the proposed HBFCL is a promising solution to address protection issues.