Papers by Preye Milton Ivry
2014 International Symposium on Electromagnetic Compatibility
The version presented here may differ from the published version or from the version of record. I... more The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.
Vehicle-to-Grid (V2G) is an emerging application of plug-in electric vehicles communicating with ... more Vehicle-to-Grid (V2G) is an emerging application of plug-in electric vehicles communicating with power grids to provide energy or ancillary services. Power quality improvement is one of the possible benefits of V2G systems. In this paper, V2G is evaluated as a means to improve distribution network power quality via harmonic suppression. Based on a V2G trial project, simulations were conducted with practical power quality parameters monitored and collected from installed charging points with V2G functions. Both the simulation and practical results revealed an improvement in voltage rms value but an increase in current harmonics during V2G operation. On the other hand, V2G had no significant effect on voltage harmonics. Lastly, potential solutions on how to suppress current harmonics were proposed.
The microgrid concept integrates Renewable Energy Systems (RES) to the Electrical Power System (E... more The microgrid concept integrates Renewable Energy Systems (RES) to the Electrical Power System (EPS) as a means to produce clean energy, meet consumer energy demands and preserve the depleting fossil fuels reserves. These RES are usually interfaced to the grid using power electronic converters (such as Voltage Source Converters) to achieve the required control and conversion of power. Nevertheless, Voltage Source Converters (VSCs) produce both current and voltage harmonics which negatively impact on the Power Quality (PQ) of a microgrid and may cause damage or malfunctions of equipment. This thesis focuses on the impact of VSC harmonics on the power quality of a microgrid. It also investigates various factors that affect the harmonics generated by VSCs with the aim of predicting their impact on the PQ of the microgrid. The PQ of the microgrid is represented as a measure of the level of harmonic distortion of the voltage and current at the Point of Common Coupling (PCC) to the grid. ...
Various uncertainties arise in the operation and management of power systems containing Renewable... more Various uncertainties arise in the operation and management of power systems containing Renewable Energy Sources (RES) that affect the systems power quality. These uncertainties may arise due to system parameter changes or design parameter choice. In this work, the impact of uncertainties on the prediction of harmonics in a power system containing multiple Voltage Source Converters (VSCs) is investigated. The study focuses on the prediction of harmonic distortion level in multiple VSCs when some system or design parameters are only known within certain constraints. The Univariate Dimension Reduction (UDR) method was utilized in this study as an efficient predictive tool for the level of harmonic distortion of the VSCs measured at the Point of Common Coupling (PCC) to the grid. Two case studies were considered and the UDR technique was also experimentally validated. The obtained results were compared with that of the Monte Carlo Simulation (MCS) results.
2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)
Operational uncertainties such as variation of power or grid impedance affect the level of conduc... more Operational uncertainties such as variation of power or grid impedance affect the level of conducted emission of power converters in renewable energy systems. This paper utilizes an enhanced Unscented Transform (UT) method based on dimension reduction technique to predict the conducted emissions of multiple Voltage Source Converters (VSCs) in the presence of uncertainties. The accuracy of the predicted results are then compared with the Monte Carlo Simulation approach and the traditional Unscented Transform.
2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), May 1, 2016
This paper highlights the importance of assessing Power Quality (PQ) of microgrids using the reco... more This paper highlights the importance of assessing Power Quality (PQ) of microgrids using the recommended indices as stated in IEEE 519 and IEEE 1547 standards. It assesses the microgrid PQ by verifying if converter harmonics at the Point of Common Coupling (PCC) to the grid complies or exceeds the IEEE 519 standard on harmonic limit.
Proc. of the 2014 International Symposium on Electromagnetic Compatibility (EMC Europe 2014), Gothenburg, Sweden, September 1-4, 2014, 2014
One objective of the smart grid is to produce clean energy through the use of Renewable Energy So... more One objective of the smart grid is to produce clean energy through the use of Renewable Energy Sources (RES) such as wind turbines and photovoltaic cells. RES systems are usually interfaced to the grid using electronic power converters. However, these interfacing converters generate voltage and current harmonics at the converter terminal which are further transmitted to the rest of the smart grid. This paper presents and evaluates different factors that may affect the produced harmonics and reduce the quality of power on the smart grid. The factors are investigated first from the converter design specification such as the switching frequency, modulation index and the converter topology, then from the smart grid network characteristics. It clearly shows in detail the relation between these factors and the harmonics generated by the converters and how it affects the power quality of the smart grid. The RES system and smart grid was simulated using MATLAB Simulink™ and Plecs™ simulation tools.
The increased penetration of renewable and alternative energy systems such as wind turbines and p... more The increased penetration of renewable and alternative energy systems such as wind turbines and photovoltaic cells upon the distribution network has led to a new concept called "Microgrid". The renewable/alternative generation systems upon the microgrid are sometimes referred to as Distributed Energy Resource (DER) system and are usually interfaced with the grid using power electronic converters. However, as the power converter switch at high frequencies, harmonic voltages and currents are generated at the converter terminals and these harmonics are further transmitted to the microgrid/grid. This paper presents and evaluates different factors that may affect the produced harmonics and reduce the quality of supply including the switching frequency, modulation index and the converter topology. It clearly shows in detail the relation between these factors and the harmonics generated by the converters. Moreover, it introduces a generic model of a DER grid interfacing Voltage Source Converter (VSC). The paper also presents methods that can be used to mitigate these harmonics. The simulation was modelled and the results are presented using MATLAB Simulink TM and Plecs TM simulation tools.
Uploads
Papers by Preye Milton Ivry