Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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Author: search.filters.author.Parthiban, P.Subject: search.filters.subject.Power Quality (PQ)

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    A Novel Three-Phase Low Voltage (LV) Dynamic Voltage Restorer (DVR) Employing Semi-Z-Source Inverter
    (IEEE Computer Society help@computer.org, 2018) Remya, V.K.; Parthiban, P.; Nandakumar, A.; Ansal, V.
    This paper presents the design and control of a Low Voltage (LV) Dynamic Voltage Restorer (DVR) for a three-phase power system. The DVR is designed to protect a three-phase load of 3 kVA from the voltage sags and swells ranging up to 0.5 p.u of the supply voltage. The proposed DVR utilizes semi-Z-source (SZS) inverter as the power converter in each phase of the DVR. The SZS inverter offers many advantages such as reduction in cost, size, weight, elimination of filter etc. compared to the conventional Full Bridge (FB) inverter based DVR. Each phase is controlled independently which offers mitigation of both symmetrical and asymmetrical sags. The proposed DVR employs the modified feedback control technique. The simulation results from MATLAB/Simulink environment verify the efficacy of the proposed DVR topology. The proposed DVR topology is suitable for mitigation of sags and swells initiating at any point-on-wave. © 2018 IEEE.
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    A comparative study of full-bridge inverter based DVR and SEMI-Z-source inverter based DVR
    (Institute of Electrical and Electronics Engineers Inc., 2018) Remya, V.K.; Parthiban, P.; Nandakumar, A.
    There is always a necessity to protect the voltage sensitive industrial systems from Power Quality (PQ) issues to prevent the loss of product quality and revenue. Generally, custom power devices take the responsibility to mitigate these PQ problems, restore the voltage and thus maintain the PQ standards. Dynamic Voltage Restorer (DVR) is one among the custom power devices which offers an economical compensation of load voltage under abnormal supply voltage conditions. The voltage injected in series by the DVR compensates the load profile during PQ events; appropriate voltage injected by the DVR in series with supply protects the load and restores the voltage to pre-defined values. The required injected voltage is generated by the inverter circuit in the DVR system. The most commonly used DVR inverter is the full-bridge inverter which consists of four switches. The Semi-Z-Source (SZS) inverter based DVR which offers same injection capability with only two-switches is compared with the full-bridge inverter. The in-phase compensation technique is employed in both the DVRs for injecting required voltage into the grid. The efficiency, quality of the injected voltage and load voltage are studied. This paper presents simulation results in MATLAB/Simulink environment to validate thecomparison. © 2018 IEEE.
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    Design, and Hardware Implementation of Semi-Z-Source Inverter based Transformer-less Dynamic Voltage Restorer
    (Institute of Electrical and Electronics Engineers Inc., 2023) Remya, V.K.; Parthiban, P.; Nandakumar, A.; Ansal, V.; Rajkumar, K.
    In this paper, design, and implementation of a semi-Z-source inverter based topology of Dynamic Voltage Restorer (DVR) is discussed. The topology utilizes the semi-Z-source buck inverter to synthesize the missing voltage for load compensation during power quality (PQ) events. The absence of filter components, elimination of shoot-through phenomenon, reduced size and cost of the SZS inverter are some of the attributes of the proposed DVR topology. The design and the hardware implementation of the laboratory prototype of the semi-Z-source inverter based DVR is elaborated in this paper. © 2023 IEEE.