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P. Vijayapriya

Bio: P. Vijayapriya is an academic researcher from VIT University. The author has contributed to research in topics: Inverter & AC power. The author has an hindex of 1, co-authored 2 publications receiving 2 citations.

Papers
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Journal ArticleDOI
TL;DR: It has been found that with the STATCOM implemented, the voltage profile of all the bus has increased nearly to 1 pu and the power factor has improved to 0.97 when compared to the other compensating devices.
Abstract: Background/Objectives: Due to the immense development in distributed generation, the entire power system network requires flexible control of power flow and increased stability. Methods/Statistical analysis : In order to achieve this as well as to improve the reliability of the network, power electronics switches are incorporated at several locations as the control of these switches are comparatively easy and accurate. Cascaded multilevel inverter based static synchronous compensator is one such device that provides better reactive power compensation, improves voltage profile as well as enhances the power factor of the system. Findings: This paper is intended to design and analyze static synchronous compensator (STATCOM) utilizing cascaded H-bridge (CHB) multilevel inverter. The designed STATCOM has been used for the Reactive Power Compensation (RPC) and power factor improvement for the single end fed power system network modeled in Simulink. Seven levels CHB multilevel inverter has been designed for STATCOM using sine pulse width modulation (SPWM). The output of the inverter is then filtered using the pi filter to obtain nearly sinusoidal voltage profile. Single end fed power system network has been modeled in Simulink. STATCOM majorly provides reactive power and improve the power factor of the system without any further loading on it. For confirming the effectiveness of the proposed STATCOM compensation, the system has also been analyzed with shunt compensation by fixed capacitor and thyristor switched capacitor (TSC) individually and the same study has been carried out to compare them. Applications/Improvements: It has been found that with the STATCOM implemented, the voltage profile of all the bus has increased nearly to 1 pu and the power factor has improved to 0.97 when compared to the other compensating devices.

2 citations

Proceedings ArticleDOI
01 Jan 2014
TL;DR: In this paper, a multi-gradient inverter with low total harmonic distortion in the output voltage is presented, which is self-stabilized through a closed feedback loop, and the inverter incorporates operational amplifier as integrator to generate variable voltage slope.
Abstract: The paper presents a multi gradient inverter with low total harmonic distortion in the output voltage. The inverter implements summation of variable voltage slope to obtain the sinusoidal output. The inverter output voltage is self-stabilized through a closed feedback loop. The inverter incorporates operational amplifier as integrator to generate variable voltage slope. Summation of these voltages produces sine wave output. The entire system is designed to give the output with low harmonic distortion without using filter circuit. To verify the presented model simulations with MATLAB/Simulink software has been conducted. Simulation results prove the validity of the model.

Cited by
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Journal ArticleDOI
TL;DR: In this article, the Static Synchronous Compensator (STATCOM) is used to control reactive power through transmission lines in an IEEE standard 5 bus system to meet constraints on bus voltage magnitude, thermal limits and power factor.
Abstract: Background/Objectives: This paper presents implementation of Static Synchronous Compensator (STATCOM) which can control reactive power through transmission lines in an IEEE standard 5 bus system to meet constraints on bus voltage magnitude, thermal limits and power factor. Methods/Statistical Analysis: This is made possible by appropriately controlling compensation current of shunt compensator. Findings: Simulation results on performance of STATCOM are studied in MATLAB/SIMULINK and validated the effectiveness of the controller. The results show reduction in losses, improvement in power factor and improvement in bus voltage profile are obtained with STATCOM. Application/Improvements: Power flow through the transmission line had improved from 0.014 p.u. to 0.154 p.u.

7 citations

Journal ArticleDOI
31 May 2021
TL;DR: This paper describes a 7-Level Cascaded H-Bridge Multilevel Inverter (CHB-MLI) architecture with fewer switches and lower harmonics, ideally suited for medium voltage and high-power applications since it synthesizes numerous Direct Current (DC) sources.
Abstract: In the current context, Medium Voltage High Power (MVHP) applications are developing industrial technologies. The direct connection of a Photovoltaic (PV) system to an MVHP system may cause various connectivity challenges. To address the interconnection difficulties, this paper describes a 7-Level Cascaded H-Bridge Multilevel Inverter (CHB-MLI) architecture with fewer switches and lower harmonics. This article proposes the Reduced Switch Multilevel Inverter (RSMLI). This design is less expensive than traditional Multilevel Inverter (MLI) topologies, and it is ideally suited for medium voltage and high-power applications since it synthesizes numerous Direct Current (DC) sources. The innovative 7-Level inverter is represented with a decreased number of switches using the Phase Opposition Disposition (POD) methodology. The lower switch count helps the construction of simple converter structures. To boost performance, the MATLAB/Simulink results are evaluated.

2 citations