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Prasanna, R.
- Voltage Controller for 3 Level NPC-MLI Based HSVM With Grid Connected PV System
Abstract Views :185 |
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Authors
Affiliations
1 SRM University, Kattankulathur, Chennai -600048, Tamil Nadu, IN
1 SRM University, Kattankulathur, Chennai -600048, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 35 (2016), Pagination:Abstract
Objectives: This paper proposes an improved Neutral Point Clamped 3-Level Inverter (NPC-TLI) that is suitable for transformer-less Photovoltaic (PV) grid connected system. Methods/Analysis: The use of NPC topology guarantees the reduction of shoot-through risk and helps keep common mode voltage in check. The inverter is controlled by Hysteresis Space Vector Modulation algorithm which helps to decrease Total Harmonic Distortion (THD) factor in the output. The proposed system simulation results were verified using MATLAB/SIMULINK. Findings: Furthermore, the use of a split inductor helps to avoid the use of a transformer, hence, reducing the size, leakage current and the voltage stress in the inverter. The input of the system is derived from a PV source whose output can be synchronized with a grid connected system. Novelty/ Improvement: The use of SVVC using hexagonal hysteresis areas ensures reduced THD and improved DC link voltage balancing in the capacitors of the NPC configuration. Reduced common mode voltage, and switching losses are other added benefits of the inverter configuration.Keywords
Hysteresis Space Vector Modulation (HSVM), Maximum Power Point Tracking (MPPT), Multilevel Inverter (MLI), Neutral Point Clamping (NPC), PV System.Full Text
- Design Antenna Using Fractal Geometries & Conductive Thin Films
Abstract Views :94 |
PDF Views:0
Authors
Affiliations
1 School of Electrical Engineering, Vel Tech Dr. RR & Dr. SR Technical University, IN
1 School of Electrical Engineering, Vel Tech Dr. RR & Dr. SR Technical University, IN
Source
International Journal of Engineering Research, Vol 2, No 4 (2013), Pagination: 278-281Abstract
The use of fractal geometries has significantly impacted many areas of science and engineering; one of which is antenna. Designing antenna using fractal geometries has been shown to improve several antenna features. Moment method based simulation code was applied to perform a detailed parametric study for H-Shape model. The use of this model reduces the size of a resonant antenna compared with square antenna. This model is studied as single element and arrays which shows improvement in antenna gain.Keywords
Fractal, H-Shaped, Conductive Thin Film, Polyacetylene Polypyrrole and Poly P-Phenylene-Benzobis-Thiazole.Full Text
- Bandwidth Enrichment for Micro-Strip Patch Antenna Using Pendant Techniques
Abstract Views :104 |
PDF Views:0
Authors
Affiliations
1 School of Electrical Engineering, Vel Tech Dr. RR & Dr. SR Technical University, IN
1 School of Electrical Engineering, Vel Tech Dr. RR & Dr. SR Technical University, IN
Source
International Journal of Engineering Research, Vol 2, No 4 (2013), Pagination: 286-289Abstract
A probe feed, slotted hexagonal patch antenna has been proposed. Bandwidth enhancement has been improved by suitably cutting slots into hexagonal patch. Proposed antenna is suitable for various telecoms, LAN, Wi-Fi applications in ISM-band. It is demonstrated that the proposed antenna exhibits resonance in ISM-Band and a peak gain of 6dBi. The antenna structure is described and simulated results are presented.Keywords
Microstrip Patch Antenna, Band Width Enhancement, Gain, Dielectric Substrate, Simulation.Full Text