Vigna Kumaran Ramachandaramurthy

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This paper present the tolerance analysis and evaluation of flicker severity Pst short term perceptibility assessment for 1 minute observation time based on IEC61000-4-15 flickermeter standard. The evaluation approach takes a complete range of standard rectangular modulated test waveform set for evaluation of both 10 minutes and the 1 minute observation(More)
A multiple magnitude-duration (MMD) function is proposed for voltage sag acceptability assessment. The MMD function is a statistical representation of voltage sag derived from its rms analysis. The MMD function maps a series of correlated sag magnitude and duration points onto the standard power acceptability curve, revealing the dynamic characteristic of(More)
This paper presents a novel fault-location scheme for unbalanced power distribution system in the presence of distributed generation (DG). The proposed scheme first identifies the possible fault locations using a new formulation of the impedance-based method. The new formulation overcomes the requirement of fault-type identification by using only one(More)
Increase in electric vehicle mobility has encouraged the growth of vehicle to grid technology. Vehicle to grid technology allows bidirectional power flow between the battery of electric vehicle and the power grid. This allows peak load shaving, load leveling, voltage regulation and improvements of power system stability. Implementation of the vehicle to(More)
In a conventional energy storage system in a grid-connected solar power stations, solar power is transferred to the grid through a PV-Inverter, and the battery is charged and discharged through a bi-directional converter. In this paper, a novel grid energy storage system for large-scale PV systems is discussed. With the proposed configuration, the battery(More)
The realization of vehicle to grid technology requires the development of an appropriate bidirectional electric vehicle charger. This paper presents the development of a bidirectional vehicle to grid charger, which consists of a front-end bidirectional AC/DC converter and a back-end bidirectional buck-boost DC/DC converter, separated by DC-link capacitor.(More)
Excessive greenhouse gas emissions from conventional internal combustion engine vehicles have encouraged governments worldwide to seek for alternative solutions and electric vehicles seems to be a promising replacement. However, the interconnection of high penetration of electric vehicles into the power grid can alter the operation of the existing network.(More)
This paper investigates the fault ride through (FRT) capability improvement of a doubly fed induction generator (DFIG)-based wind turbine using a dynamic voltage restorer (DVR). Series compensation of terminal voltage during fault conditions using DVR is carried out by injecting voltage at the point of common coupling to the grid voltage to maintain(More)
Burning of fossil fuels to generate electricity is one of the fundamental causes of global warming. Wind energy has substantial potential due to the availability of wind and due to its non-polluting nature. The upward demand for wind energy has enabled considerable improvement in wind turbine technology. Among the wind turbine technologies available,(More)
New members of XY converter family topologies are proposed in this treatise for a high-voltage/low-current renewable application. Based on the X Converter, the whole existing X-Y Converter family is categorized into four categories; L-Y, 2L-Y, 2LC-Y and 2LCm-Y converter. Four new 2LC-Y topologies (2LC-LVD, 2LC-2LVD, 2LC-2LCVD and 2LC-2LCmVD) converters are(More)