The protection of nonlinear and sensitive loads can be achieved economically through series compensation-based dynamic voltage restorer. The effective voltage compensation by dynamic voltage restorer depends on the controller used for voltage sag detection. In this paper, the sag detection of dynamic voltage restorer employing feed-forward control and synchronous reference frame control are compared. The efficiency of sag detection of these controls in dynamic voltage restorer for in-phase compensation of balanced sags with PWM-based injection of compensation voltage is analyzed. Comparisons on the performance of the controllers are shown clearly using Matlab/Simulink-based simulated results. © Springer Nature Singapore Pte Ltd. 2018.

Palanisamy K

Department of Energy and Power Electronics

School of Electrical Engineering

Vellore Campus

Rini Ann Jerin A

Umashankar S

Sanjeevikumar P.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Comparative Analysis of Feed-Forward and Synchronous Reference Frame Control-Based Dynamic Voltage Restorer

Advances in Power Systems and Energy Management Lecture Notes in Electrical Engineering

Multilevel inverters (MLIs) are gaining familiarity in industries for high-voltage applications. This study is a comparison of symmetric and asymmetric reduced switch MLI topologies which require a lesser number of switches for generating the desired number of voltage levels. In both symmetric and asymmetric conditions, output voltage levels are generated using the same number of switches with different DC source magnitudes. Unipolar pulse width modulation strategy is adapted in these topologies to generate the switching pulses. Three different unipolar references (sine, trapezoidal, 60°) and three different carrier arrangements (phase disposition, alternative phase opposition and disposition and variable frequency) are taken and each reference is compared with three different carrier signals. The performance parameters such as total harmonic distortion (THD), crest factor and distortion factor are evaluated for different modulation indices and compared with both conditions. The proposed topology in symmetric and asymmetric conditions can generate 9-level and 31-level output voltages, respectively, which are simulated using MATLAB/Simulink and verified with the experimental setup. The calculation of%THD using analytical asymptotic formula is also carried out. The theoretical value of%THD is verified to match closely with the simulation and experimental results. © The Institution of Engineering and Technology 2016.

IET Power Electronics

Comparative analysis of symmetric and asymmetric reduced switch MLI topologies using unipolar pulse width modulation strategies

Research of multilevel inverter (MLI) has always been a noteworthy inspiration to increasing number of levels with decreasing total harmonic distortion (THD). Various topologies of symmetric dc source and asymmetric dc source multilevel inverter have been developed. In this paper, a new asymmetric dc source hybrid multilevel inverter topology with minimized switch count is proposed. It is possible to extent any number of levels. Multicarrier pulse width modulation techniques are adopted for triggering the gate pulses. The operation of the proposed topology is explained with 15-level output voltage. In that, phase disposition (PD) technique has 8.03% of THD when compared to the carrier overlapping (CO) technique. The simulation results are carried out by using MATLAB/Simulink with different modulation index. © 2015 IEEE.

2015 IEEE Conference on Energy Conversion (CENCON)

New hybrid multilevel inverter topology with reduced switch count using carrier based pulse width modulation technique

IEEE Transactions on Industry Applications

Control of Reduced-Rating Dynamic Voltage Restorer With a Battery Energy Storage System

Flexible AC Transmission Systems (FACTS)

FACTS and FACTS Controllers

“SRF Theory Revisited” to Control Self-Supported Dynamic Voltage Restorer (DVR) for Unbalanced and Nonlinear Loads

Journal	Data powered by TypesetAdvances in Power Systems and Energy Management Lecture Notes in Electrical Engineering
Publisher	Data powered by TypesetSpringer Singapore
ISSN	1876-1100
Open Access	No