D. B. REDDY

National Institute of Technology Goa

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M. V. Ramana Reddy

Icahn School of Medicine at Mount Sinai

V. Padmavathi

Sri Venkateswara University

P. V. R. REDDY

Sri Venkateswara University

B. Seenaiah

Sri Venkateswara University

Adivireddy Padmaja

Sri Venkateswara University

S. Reddy

Sri Venkateswara University

V. T. Somasekhar

National Institute of Technology Warangal

M. Muralidhar Reddy

Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology

T. Seshamma

Sri Venkateswara University

N. S. Reddy

Sri Venkateswara University

Cooperative Institutions

Sri Venkateswara University

National Institute of Technology Goa

Pondicherry University

Indian Institute of Science Bangalore

National Institute of Technology Warangal

University of Madras

Indian Institute of Chemical Technology

Northeastern University

Icahn School of Medicine at Mount Sinai

Anna University, Chennai

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Converter-less MPPT for rural area applications

Manjunath Matam D. B. REDDY

A popular method to extract maximum power from a solar PV array is the direct connection of a DC/DC converter to the PV array. It is known as Maximum Power Point Tracking (MPPT) technique. In this approach, the PV array is perturbed at a fractional voltage and few tens of kHz frequency. Drawbacks in this approach of maximum power extraction include oscillations in the DC voltage, reduced conversion efficiency and frequent maintenance of the converters (owing to the frequent failure of electrolytic capacitor), which makes it unsuitable to rural area PV applications. This paper proposes Dynamic PV array (DPVA) approach for extracting maximum power from PV array. In this approach, a switch-network of semiconductor switches or electrical relays is integrated into the PV array to choose a matching-configuration for the load. The absence of high-frequency operation, oscillations in the DC voltage and power processing stages are some inherent advantages of this approach. This paper presents a procedure to design a specific size Dynamic PV array, such that, it produces MPP or close to MPP power at all load conditions. Further, a mathematical relationship between the size of DPVA and the Minimum Output Power (MOP) it can produce is derived. Simulations and a six-module experimental tests are conducted to validate the derived relation.

Maximum power principle

10.1109/pedes.2018.8707757

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Citations (1)

Reconfiguration Based Single Stage PV Water Pumping System

Harish Kumar Varma Gadiraju D. B. REDDY Rohit Jain

The market for PV is growing rapidly around the world in last few years due to its diverse applications. The output power of PV cells depends on various factors. Among them, Partial Shading is commonly encountered issue which yields in reduction of output power. This reduction of power reduces the output of the pump. This paper proposed a reconfiguration based PV water pumping system. The proposed algorithm firstly generates maximum power output under Partial shading conditions. Secondly, the MPPT algorithm tracks the maximum power. Further V/f control and SAZE PWM are used to operate the Induction motor effectively. The Performance of the system is analyzed using MATLAB simulations.

Control reconfiguration

Maximum power principle

Shading

10.1109/npec47332.2019.9034870

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An effective dual-objective optimization to enhance power generation in a two-stage grid-tied PV system under partial shading conditions

Energy (2024)

Swetha K.T.D. B. REDDY

Shading

Power grid

10.1016/j.energy.2024.132259

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Citations (1)

ChemInform Abstract: A New Method for Synthesis of 1,3,5‐Triacetylbenzene.

ChemInform (1998)

D. B. REDDY N. Chandrasekhar Babu

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

10.1002/chin.199838081

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ChemInform Abstract: A Novel Phase‐Transfer Catalyzed Cycloaddition of Carbonyl‐Stabilized Sulfur Ylides to Vinylic Sulfones.

ChemInform (1987)

D. B. REDDY P. S. REDDY B. V. Reddy P. Amruta Reddy

Abstract The arylcyclopropylsulfones (III) are prepared from the vinylic sulfones (I) by coupling with sulfur ylides derived from the phenacylsulfonium bromides (II).

10.1002/chin.198722171

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ChemInform Abstract: SYNTHESIS AND SPECTRAL STUDIES OF SOME UNSATURATED SULFONES

Chemischer Informationsdienst (1984)

D. B. REDDY B. Sankaraiah T. Balaji

Abstract Die zur Herstellung von Arylcyclopropylsulfonen benötigten ungesättigten Sulfone (V) werden aus den Arylsulfonylessigsäuren (III) und den aromatischen Aldehyden (IV) erhalten.

Sulfone

10.1002/chin.198405161

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A decoupled SVPWM technique for a dual inverter four-level open-end winding induction motor drive with voltage balancing of Dc-link capacitors

D. B. REDDY V. T. Somasekhar

Four-level inversion is realised by connecting two two-level inverters, fed from both ends of open-end winding induction motor with Asymmetrical DC link voltages in the ratio of 2:1. This inverter scheme produces 64 space-vector combinations distributed over 37 space-vector locations. All the switching combinations are not helpful to achieve four level inversion, some of the combinations overcharge DC-link capacitor of the inverter operating with a lower DC-link voltage of V dc /3 by other inverter with higher DC-link voltage of 2V dc /3. Decoupled space vector PWM switching strategy is described to eliminate the overcharging effect. Isolated DC power supplies are employed to avoid the zero-sequence currents. Simulation and experimental results are presented in this paper.

10.1109/pedes.2010.5712530

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Citations (8)

ChemInform Abstract: Cyclohexanonedicarboxylates as Precursors for the Synthesis of Some Spiropyrimidinetetrones and Spiropyrazolidinetriones.

ChemInform (1993)

D. B. REDDY V. Padmavathi P. V. R. REDDY

10.1002/chin.199321178

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Citations (2)

ChemInform Abstract: Synthesis and Antimicrobial Activity of Some Enamino Ketones and Esters of Bis(2‐pyrazolyl)ketones and Sulfones.

ChemInform (1995)

D. B. REDDY Adivireddy Padmaja V. Padmavathi