Conference Papers

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    Performance study of high frequency link AC-AC converter
    (IEEE Computer Society, 2014) Ansal, V.; Parthiban, P.; Ravikumar, K.
    In this paper operation performance of an high-frequency (HF) link ac/ac converter is demonstrated using computer aided simulation package PSCAD/EMTDC. The converter consists of input filter, input matrix converter, HF transformer, and output matrix converter. The proposed configuration permits flexibility in the choice of voltage levels and frequency in the system without the penalty of bulky magnetic components. The proposed approach achieve high voltage transfer ratio, HF galvanic isolation of the input source from the output utility, higher power density by introducing a HF transformer in between the two stages of the converter. It is capable of having bidirectional power flow, achieve lower harmonic distortion on both input and output sides with proper filter design and controllable input displacement power factor. It also provides fast response, high efficiency, and free from acoustic noise. Comprehensive results are presented to assess the performance of the converter. Several features like voltage sag compensation, instantaneous voltage regulation, and power factor correction can be combined to this converter. This kind of converter laid the base for regulated ac power supplies and electronic transformers. © 2014 IEEE.
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    Simulation study of a power electronic transformer based on matrix converter
    (IEEE Computer Society help@computer.org, 2015) Ansal, A.; Parthiban, P.
    A power electronic transformer (PET) is a direct AC/AC converter with a high frequency isolation. Various topologies of electronic PETs have been discussed in recent literatures. This paper is concentrated on the simulation study of an electronic transformer adopting matrix converter on either side of the high frequency isolation transformer. The industrial standard power system simulation package PSACD/EMTDC is used for the modeling of the PET. The PET described can convert a sinusoidal AC to a lower or higher voltage and/or to a lower or higher frequency without DC link. Both the steady state and transient performance of the converter are carried out to assess the performance. The simulation results of the converter shows that the PET accomplishes high frequency isolation, bidirectional power flow, two stage power conversion, higher power density, controllable input source displacement power factor, and lower harmonic distortion on both input and output sides. © 2014 IEEE.
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    Performance analysis of distance relay in an AC grid with VSC-HVDC connection
    (Institute of Electrical and Electronics Engineers Inc., 2017) Tale, S.; Muniappan, M.; Vittal, K.P.
    Voltage Source Converter (VSC) based High Voltage Direct Current (HVDC) link is the economic option for long distance bulk power transmission and it is used to interconnect distributed generation sources into AC grids. A 3-terminal VSC-HVDC system has been modeled in this paper. With the penetration of such Multi-terminal VSC-HVDC links into the AC grid, mis-coordination in the operation of distance relays of the AC transmission system is investigated where a Zone-2 fault can possibly be viewed as a Zone-3 event. Also, the impact of change in AC voltage reference and active power reference of a VSC on the performance of distance relays is studied. This analysis is validated through simulation results in PSCAD/EMTDC environment. © 2017 IEEE.
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    Modeling and simulation of PMSG-based wind power generation system
    (Institute of Electrical and Electronics Engineers Inc., 2018) Muniappan, M.; Vittal, K.P.
    Wind energy is one of the best technologies and widely used source of renewable energy for supplying the electric power to the world due to its environmental and economic advantages. An application of permanent magnet synchronous generator (PMSG) into the wind energy system is continuously increasing. In this paper, the modeling and simulation of a PMSG-based wind power generation system under power system dynamic conditions are presented. The dynamic behavior of the wind power generation system is analyzed during the start-up process and the gust, ramp and noisy variation of wind conditions using PSCAD/EMTDC simulation. © 2018 IEEE.
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    Modeling and simulation studies on performance evaluation of three-terminal VSC-HVDC link connected offshore wind farms
    (Institute of Electrical and Electronics Engineers Inc., 2018) Muniappan, M.; Vittal, K.P.
    Due to the continuous increase in power demand, offshore wind farms (OWFs) are increasing consistently since last decade. Normally OWFs are located at very long distance from the onshore grid. VSC based HVDC link is the economic option to interconnect the OWFs with the onshore grid. An application of multi-terminal networks into the HVDC link is continuously increasing. In this paper, a three-terminal VSC based HVDC link connected OWFs is modeled and its performance is analysed using PSCAD/EMTDC. The response of the proposed HVDC system is analysed under different wind conditions and various power system fault conditions. In addition, Harmonic performance of HVDC system is analysed. The final emphasis of this paper is to assess transient behaviour of multi-terminal VSC-HVDC systems. © 2017 IEEE.