Browsing by Author "Agelidis, Vassilios"
Now showing items 21-40 of 42
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Interleaved selective harmonic elimination PWM for single-phase rectifiers in traction applications
(2013)
Conference report
Restricted access - publisher's policyInterleaved four-quadrant, single-phase rectifiers are widely used in traction applications as part of an AC-DC-AC conversion system. This paper presents selective harmonic elimination pulse-width modulation (SHE-PWM) ... -
Minimization of the capacitor voltage fluctuations of a modular multilevel converter by circulating current control
(2012)
Conference report
Open AccessThe modular multilevel converter (MMC) is one of the most potential converter topologies for medium/high power/voltage applications. One of the main technical challenges of an MMC is to eliminate/minimize the circulating ... -
Modulation strategy for multiphase neutral-point-clamped converters
(2015-02-01)
Article
Open AccessThis paper presents a novel modulation strategy for n-phase neutral-point-clamped (NPC) converters. The proposed modulation strategy is able to control and completely remove the low-frequency neutral-point (NP) voltage ... -
On improving phase-shifted PWM for flying capacitor multilevel converters
(2016-08-01)
Article
Restricted access - publisher's policyThis letter proposes a phase-shifted pulse-width modulation (PS-PWM) technique for the flying capacitor (FC) multilevel converter that improves the quality of the line-to-line voltages. In traditional PS-PWM, the line-to-line ... -
Optimal injection of harmonics in circulating currents of modular multilevel converters for capacitor voltage ripple minimization
(2013)
Conference report
Restricted access - publisher's policyThis paper proposes an algorithm to calculate the optimal amplitude and phase of the harmonic current components that can be injected in the circulating currents of a modular multilevel converter (MMC) to minimize the ... -
Optimum state voltage balancing method for stacked multicell converters
(2013)
Conference report
Open AccessThis paper presents a voltage balancing method for stacked multicell converters based on phase disposition pulse-width modulation. This method is based on minimizing a cost function to determine the optimum redundant state ... -
Performance evaluation of a five-level flying capacitor converter with reduced DC bus capacitance under two different modulation schemes
(2012)
Conference report
Restricted access - publisher's policyIn flying capacitor (FC) converters, phase-shifted pulse-width modulation (PS-PWM) provides natural voltage balancing. However, for a practical application, a more robust balancing mechanism of maintaining the FC voltages ... -
Performance evaluation of three-phase grid-connected photovoltaic inverters using electrolytic or polypropylene film capacitors
(2014-10-01)
Article
Restricted access - publisher's policyIn grid-connected photovoltaic (PV) power stations, improving the life expectancy and long-term reliability of three-phase PV inverters is urgently needed to match the significantly higher lifetime of the PV modules. A key ... -
Positive- and negative-sequence control of grid-connected photovoltaic systems under unbalanced voltage conditions
(2013)
Conference report
Open AccessThis paper discusses the control of the positive- and negative-sequence components of a large-scale grid-connected photovoltaic system (GCPS) under unbalanced voltage sag conditions in the grid. Some issues regarding ... -
Reducing circulating currents in interleaved converter legs under selective harmonic elimination pulse-width modulation
(2015)
Conference report
Open AccessInterleaving of voltage source converter legs enables higher output currents per phase, effectively increasing the power rating without increasing semiconductor ratings. Different switching patterns between the converter ... -
Single-carrier phase-disposition PWM implementation for multilevel flying capacitor converters
(2015-10-01)
Article
Open AccessThis letter proposes a new implementation of phase-disposition pulse-width modulation (PD-PWM) for multilevel flying capacitor (FC) converters using a single triangular carrier. The proposed implementation is much simpler ... -
Single-stage inverter-based grid-connected photovoltaic system with ride-through capability over different types of grid faults
(2013)
Conference report
Open AccessIn this paper the control of a single-stage grid-connected photovoltaic power plant (GCPPP) is developed to address the issue of inverter disconnection under various grid faults. There are three main reasons for inverter ... -
Solid State Transformer Based on the Flying Capacitor Multilevel Converter for Intelligent Power Management
(IEEEXPLORE, 2012)
Conference report
Restricted access - publisher's policyFuture grids will consist of large scale of integration of both renewable and other distributed energy sources. Therefore, advanced power electronics converters for critical loads will be needed in order to enhance power ... -
Utilising redundant voltage levels for circulating current control in modular multilevel converters
(2015)
Conference report
Open Access -
Varying and unequal carrier frequency PWM techniques for modular multilevel converters
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyCarrier-based pulse-width modulation (PWM) strategies are commonly applied to modular multilevel converters (MMC). This paper proposes a modified PWM technique with unequal and varying carrier frequencies between consecutive ... -
Voltage balancing method for a seven-level stacked multicell converter using minimum-switching transitions
(2013)
Conference report
Open AccessThis paper presents a voltage balancing method for stacked multicell converters based on phase disposition pulse-width modulation. This method is based on minimizing a cost function to determine the optimum redundant state ... -
Voltage balancing method for the multilevel flying capacitor converter using phase-shifted PWM
(2012)
Conference report
Restricted access - publisher's policyn flying capacitor (FC) converters, phase-shifted pulse-width modulation (PS-PWM) provides natural voltage balancing. However, for a practical application, a more robust balancing mechanism of maintaining the FC voltages ... -
Voltage balancing method using phase-shifted PWM for stacked multicell converters
(2013)
Conference report
Open AccessThis paper proposes an active voltage balancing method for stacked multicell converters (SMC) using phase-shifted pulse-width modulation, which is easy to implement and extend to high number of levels. The proposed method ... -
Voltage balancing of a five-level flying capacitor converter using optimum switching transitions
(2012)
Conference report
Open AccessThe flying capacitor (FC) multilevel converter requires a capacitor voltage balancing mechanism for proper operation. This paper proposes a voltage balancing scheme for a five-level FC converter based on phase disposition ... -
Voltage balancing scheme for the multilevel flying capacitor converter using phase-shifted PWM
(2012)
Conference report
Open AccessIn flying capacitor (FC) converters, phase-shifted pulse-width modulation (PS-PWM) provides natural voltage balancing. However, for a practical application, a more robust balancing mechanism of maintaining the FC voltages ...
