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Energy Balancing Improvement of Modular Multilevel Converters under Unbalanced Grid Conditions
(Institute of Electrical and Electronics Engineers, 2017-08)
This paper presents a feedback/feed-forward control strategy to improve the voltage balancing of modular multilevel converters (MMCs) under unbalanced grid conditions. The inclusion of a feed-forward compensation improves ...
Voltage-source active power filter based on multilevel converter and ultracapacitor DC link
(2006)
A new topology for active power filters (APF) using an 81-level converter is analyzed. Each phase of the converter is composed of four three-state converters, all of them connected to the same capacitor dc link voltage and ...
High-Frequency Link: A Solution for Using Only One DC Source in Asymmetric Cascaded Multilevel Inverters
(IEEE, 2011)
Multilevel inverters are in state-of-the-art power conversion systems due to their improved voltage and current waveforms. Cascaded H-bridge (CHB) multilevel inverters have been considered as an alternative in the ...
Voltage source active power filter, based on multi-stage converter and ultracapacitor dc-link
(IEEE, 2003)
A multi-stage inverter using three-state converters is being analyzed for active filter and static var compensator applications. Each phase of the converter is composed of four three-state converters, all of them connected ...
Practical evaluation of different modulation techniques for current-controlled voltage source inverters
(INST ENGINEERING TECHNOLOGY-IET, 1996)
The quality of the current waveform generated by a current-controlled, voltage source inverter, depends basically on three factors: (a) the switching frequency of the PWM modulator; (b) the type of current waveform being ...
A series active power filter based on a sinusoidal current controlled voltage source inverter
(IEEE, 1995)
A series active power filter, working as a sinusoidal current source, in phase with the mains voltage, has been developed and tested. The amplitude of the fundamental current in the series filter is controlled through the ...
Adaptive Control Strategy for VSC-Based Systems under Unbalanced Network Conditions
(Institute of Electrical and Electronics Engineers, 2010-12)
A new adaptive control strategy, intended to improve the ride-through capability of HVDC systems under unbalanced network conditions and parameter uncertainties, is introduced. The proposed strategy resorts to a model ...
Cascaded Multilevel Converters: Optimal Asymmetries and Floating Capacitor Control
(IEEE, 2013)
Cascaded multilevel (CM) converter is a series connection of several inverters that together generate multiple voltage levels with controllable frequency, phase, and amplitude. Its main advantages are high power, reliability, ...
Compensation of Voltage disturbances in hybrid AC/DC Microgrids using series converter
(Universidade Federal de Santa Maria, 2015)