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- 저자 : Srinivas Bhaskar Karanki (검색결과 4 건)
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Buduru Naveen Kumar,Karanki Srinivas Bhaskar 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.4
Due to the enormous increase of domestic and industrial loads in the smart grid infrastructure, the power quality issues are very frequent. It is essential to monitor the quality of power being supplied to customers. To identify the quality of the power effectively at various locations, a simple solution is needed that limits the usage of computing resources and can also be deployed in remote location. This paper proposes a low-computational, automatic, real-time PQ monitoring system based on the Hilbert transform (HT), fuzzy logic and threshold based classifiers. The major contribution of the proposed method is based on sample-to-sample process that can detect the events timely, unlike a ten-cycle window-based methods. Six power quality disturbances are synthetically generated using mathematical model as per the IEEE 1159–1195 standard. The methodology utilizes HT for the extraction of the instantaneous amplitude from the filtered signal. Thereby, the essential features are extracted and fed to classifier to improve the recognition capability. The robustness of the proposed algorithm is verified in a MATLAB environment with different signal-to-noise ratios. An experimental prototype has also been developed using TMS320F28379D Launchpad to validate the proposed PQ monitoring algorithm using both synthetic and real-time PQ signals. The real-time implementation demonstrates that the proposed PQ sensing hardware and PQ disturbance analysis software are effective, fast, and accurate.
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A Single Input DC Source Boost Multilevel Inverter for Renewable Energy Applications
Anurag Priyadarshi,Pratik Kumar Kar,Srinivas Bhaskar Karanki 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
In this paper, a single input DC voltage source boost multilevel inverter topology is presented. The presented converter does not require multiple isolated dc sources or additional circuit for voltage balancing of the split capacitors, thus reduces the overall cost and complexity. The salient feature of the proposed converter is high voltage gain boost capability. Furthermore, due to the input inductor, it has less input current ripple and variable fractional voltage gain, which is a key requirement for maximum power point tracking (MPPT) in photovoltaic application. Based on the proposed topology, a hardware prototype of seven-level boost inverter is developed and the experimental results are presented to validate the performance of the proposed converter.
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Anurag Priyadarshi,Pratik Kumar Kar,Srinivas Bhaskar Karanki 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.3
This paper presents a switched capacitor (SC) based bidirectional dc-dc converter topology for high voltage gain applications. The proposed converter is able to operate with multiple integral voltage conversion ratios based on user input. The architecture of a user-friendly, inductor-less multi-voltage-gain bidirectional dc-dc converter is proposed in this study. The inductor-less or magnetic-less design of the proposed converter makes it effective in higher temperature applications. Furthermore, the proposed converter has a reduced component count and lower voltage stress across its switches and capacitors when compared to existing SC converters. An output impedance analysis of the proposed converter is presented and compared with popular existing SC converters. The proposed converter is simulated in the OrCAD PSpice environment and the obtained results are presented. A 200 W hardware prototype of the proposed SC converter has been developed. Experimental results are presented to validate the efficacy of the proposed converter.
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Priyadarshi, Anurag,Kar, Pratik Kumar,Karanki, Srinivas Bhaskar The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.3
This paper presents a switched capacitor (SC) based bidirectional dc-dc converter topology for high voltage gain applications. The proposed converter is able to operate with multiple integral voltage conversion ratios based on user input. The architecture of a user-friendly, inductor-less multi-voltage-gain bidirectional dc-dc converter is proposed in this study. The inductor-less or magnetic-less design of the proposed converter makes it effective in higher temperature applications. Furthermore, the proposed converter has a reduced component count and lower voltage stress across its switches and capacitors when compared to existing SC converters. An output impedance analysis of the proposed converter is presented and compared with popular existing SC converters. The proposed converter is simulated in the OrCAD PSpice environment and the obtained results are presented. A 200 W hardware prototype of the proposed SC converter has been developed. Experimental results are presented to validate the efficacy of the proposed converter.
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