Laplace Domain Modeling of Power Components for Transient Converter-Grid Interaction Studies

Hussein A. Alameri; Pablo Gomez

doi:10.1109/NAPS52732.2021.9654553

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Publication Date

Sun Nov 14 2021

Journal Name

2021 North American Power Symposium (naps)

Volume

31

DOI

10.1109/NAPS52732.2021.9654553

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Laplace Domain Modeling of Power Components for Transient Converter-Grid Interaction Studies

converter modeling

converter-grid interaction

frequency domain methods

Laplace transforms

transient analysis

Hussein A. Alameri

Pablo Gomez

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This paper introduces a Laplace-based modeling approach for the study of transient converter-grid interactions. The proposed approach is based on the development of two-port admittance models of converters and other components, combined with the use of numerical Laplace transforms. The application of a frequency domain method is aimed at the accurate and straightforward computation of transient system responses while preserving the wideband frequency characteristics of power components, such as those due to the use of high frequency semiconductive switches, electromagnetic interaction between inductive and capacitive components, as well as wave propagation and frequency dependence in transmission systems.

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Publication Date

Sat Apr 15 2023

Journal Name

Journal Of Mechanical Engineering

Corrosion Resistance Enhancement for Low Carbon Steel by Gas Phase Coating

Fayyadh S.K.

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Corrosion Resistance Enhancement for low carbon steel is very important to extend its life service, the coating process is one of the methods which can using to achieve this, and it's the most important in surface treatments to improve the properties of metals and alloys surfaces such as corrosion resistance. In this work, low carbon steel was nitrided and coated with nano zinc using gas phase coating technical, to enhance the resistance of corrosion. The process included adding two layers. The first, a nitride layer, was added by precipitating nitrogen (N) gas, and the second, a zinc (Zn) layer, was added by precipitating Zn. The process of precipitating was carried out at different periods (5, 10, and 15 minutes). Scan electron mi

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Publication Date

Wed Feb 20 2019

Journal Name

Political Sciences Journal

Russian foreign policy towards the Arab Gulf For the post-2001

أ.م.د.عمار حميد

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The Russian foreign policy of the post-cold-war era faced dilemmas in the light of the international and regional realities of the disintegration of the Soviet Union and the formation of a new unipolar international order led by the United States of America. Thus, Russian foreign policy-making was divided over the nature of the foreign policy to be followed. The achievement of the Russian goals, especially as the objectives of Russian foreign policy have been set within the framework of trying to regain the status and leading role, as well as the establishment of some fundamental changes to be consistent with the new international situation of the post-one The Russian Federation has adopted in the sphere of its foreign policy to the vari

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Publication Date

Tue Apr 02 2024

Journal Name

Al-iraqia Journal Of Scientific Engineering Research

Prioritise Five Tafseer Translators Using Clustering Technique for Surah Al-Baqarah

Dictionary

Image compression

Lossless Compression

LZW algorithm

photographs

Mohammed A.

Shahad Mahgoob

Hanif

Puteri Nor Ellyza

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Publication Date

Tue Dec 30 2014

Journal Name

College Of Islamic Sciences

Excuse for ignorance in Islamic law Financial transactions: (Contemporary Applied Models)

د. صهيب سليم

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The researcher highlighted in his research on an important subject that people need, which is the excuse of ignorance in Islamic law. , As the flag of light and ignorance of darkness. Then the researcher lameness of the reasons for research in this subject as it is one of the assets that should be practiced by the ruler and the judge and the mufti and the diligent and jurisprudent, but the public should identify the issues that ignore ignorance and issues that are not excused even if claimed ignorance.
Then the researcher concluded the most important results, and recommendations that he wanted to set scientific rules for students of science and Muslims in general, to follow the issues of legitimacy and learn its provisions and i

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Publication Date

Mon Aug 10 2020

Journal Name

Journal Of Petroleum Exploration And Production Technology

Geomechanical modelling and two-way coupling simulation for carbonate gas reservoir

Barzan I.

M S

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Abstract<p>Geomechanical modelling and simulation are introduced to accurately determine the combined effects of hydrocarbon production and changes in rock properties due to geomechanical effects. The reservoir geomechanical model is concerned with stress-related issues and rock failure in compression, shear, and tension induced by reservoir pore pressure changes due to reservoir depletion. In this paper, a rock mechanical model is constructed in geomechanical mode, and reservoir geomechanics simulations are run for a carbonate gas reservoir. The study begins with assessment of the data, construction of 1D rock mechanical models along the well trajectory, the generation of a 3D mechanical earth model, and runni</p> ... Show More

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Publication Date

Mon Sep 30 2019

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Synthesized 2nd Generation Zeolite as an Acid-Catalyst for Esterification Reaction

Biodiesel

Renewable Energy

Esterification

MCM-48 2nd Generation Zeolite

Ali H.

Ammar S.

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MCM-48 zeolites have unique properties from the surfaces and structure point of view as it’s shown in the results ,and unique and very sensitive to be prepared, have been experimentally prepared and utilized as a second-generation/ acid - catalyst for esterification reactions of oleic acid as a model oil for a free fatty acid source with Ethanol. The characterization of the catalyst used in the reaction has been identified by various methods indicating the prepared MCM-48 is highly matching the profile of common commercial MCM-48 zeolite. The XRF results show domination of SiO₂ on the chemical structure with 99.1% and agreeable with the expected from MCM-48 for it's of silica-based, and the SEM results show the cubic c

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(5)

Publication Date

Mon Jan 01 2024

Journal Name

Fusion: Practice And Applications

A Hybrid Meta-Heuristic Approach for Test Case Prioritization and Optimization

Fadhil H.M.

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The application of the test case prioritization method is a key part of system testing intended to think it through and sort out the issues early in the development stage. Traditional prioritization techniques frequently fail to take into account the complexities of big-scale test suites, growing systems and time constraints, therefore cannot fully fix this problem. The proposed study here will deal with a meta-heuristic hybrid method that focuses on addressing the challenges of the modern time. The strategy utilizes genetic algorithms alongside a black hole as a means to create a smooth tradeoff between exploring numerous possibilities and exploiting the best one. The proposed hybrid algorithm of genetic black hole (HGBH) uses the

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Publication Date

Sun Dec 25 2022

Journal Name

Nurse Media Journal Of Nursing

Targeting Smoking Triggers: A Nurse-led Intervention for Tobacco Smoking Cessation

Smoking Triggers

A Nurse-led Intervention

Tobacco

Smoking Cessation

Sadeq

Ali Hussein Alek

Musaab Majid

Shaymaa Mohammed

Linda

Abdulellah

Mayada

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Background: Nursing interventions tailored to the smoking triggers in patients with non-communicable chronic diseases are essential. However, these interventions are scant due to the nature of factors associated with smoking cessation and the poor understanding of the effect of nurse-led intervention in Iraq.Purpose: This study aimed to determine the dominant smoking triggers and examine the effects of a tailored nursing intervention on smoking behavior in patients with non-communicable chronic diseases.Methods: Convenience samples of 128 patients with non-communicable chronic diseases, male and female patients, who were 18-70 years old, were recruited in this quasi-experimental, randomized comparative trial in the outpatient clinic

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Publication Date

Thu Jan 01 2015

Journal Name

Journal Of Engineering

Wastewater Bio-solids Management for Fertilizer Quality Using Co- composting Process

co-composting

organic fraction of municipal solid waste

sewage sludge mature

compost.

Jathwa Abdul Karime

Iman Sahib

Tasnim Fahem

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Co-composting process can be acquired by combining organic fraction of municipal solid waste (OFMSW) with sewage sludge (SS) and mature compost (MC) as enhancement and bulking agent to overcome the problems of municipal solid waste and wastewater treatment plants besides the finally produced fertilizer usage for agriculture and horticulture. The effects of different mixture ratios of (OFMSW), (SS) and (MC) on the performance of composting process were investigated in this study. Piles of about 10 kg were prepared by mixing OFMSW, SS and MC in three different ratios (w/w) [OFMSW: SS: MC= 3:1:1, 3:2:1, and 3:3:1]. Results showed that the pile [3:1:1] was most beneficial to composting. The final compost products contained a

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Publication Date

Mon Jan 01 2024

Journal Name

Anais Da Academia Brasileira De Ciências

Morphological study for Accipitrid birds (Accipitridforms, Accipitridae) in Iraq; part two

A part two of Accipitridae Family members that belong to three genera: Circus

Gyps

and Neophron were documented as morphometrics

distribution ranges

and conservation status were reviewed and comprehensively discussed. A total of 29 voucher specimens belong to six species which are conserved in the “Iraq Natural History Research Center and Museum INHM” as follow: Marsh Harrier Circus aeruginosus (Linnaeus

1758)

Hen Harrier Circus cyaneus (Linnaeus

1766)

Montagus Harrier Circus pygargus (Linnaeus

1758)

Pallid Harrier Circus macrourus (Gmelin

1770)

Egyptian vulture Neophron percnopterus (Linnaeus

1758)

and Griffon vulture Gyps fulfus (Hablitz

1783). The results revealed significant criteria about near threatened NT species IUCN and Birdlife International listed as Pallid Harrier Circus macrourus

and Endangered (EN) species as Egyptian vulture Neophron percnopterus globally decreasing population trend.

HIND D.

KHALIDA I.

AFKAR M.

SUHAD Y.

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