METODOLOGIA DE PROJETO DE INVERSORES MONOFÁSICOS DE TENSÃO PARA CARGAS NÃO-LINEARES AUTOR FERNANDO HAEMING GERENT UNIVERSIDADE FEDERAL DE SANTA CATARINA PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA ELÉTRICA-BRASIL

METODOLOGIA DE PROJETO DE INVERSORES MONOFÁSICOS DE TENSÃO PARA CARGAS NÃO-LINEARES FERNANDO AUTOR:HAEMING GERENT UNIVERSIDADE FEDERAL DE SANTA CATARINA PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA ELÉTRICA-BRASIL 

 Resumo da Dissertação apresentada à UFSC como parte dos requisitos necessários para a obtenção do grau de Mestre em Engenharia Elétrica.

METODOLOGIA DE PROJETO DE INVERSORES MONOFÁSICOS DE TENSÃO PARA CARGAS NÃO-LINEARES
Fernando Haeming Gerent Junho / 2005

 Orientador: Prof. Ivo Barbi, Dr. Ing. Área de Concentração: Eletrônica de Potência e Acionamento Elétrico. Palavras-chave: Inversor; carga não-linear, metodologia de projeto. Número de páginas: 165.
Este trabalho tem por objetivo apresentar uma metodologia de projeto para inversores senoidais monofásicos de tensão com baixa THD que alimentam cargas nãolineares do tipo retificador monofásico com filtro capacitivo. Entre os principais atrativos deste trabalho está a interação entre os parâmetros do filtro e do transformador de forma que a relação de transformação ótima para o circuito possa ser determinada. Além disso, a falta de material relacionada ao projeto de inversores para cargas não-lineares também motivou o trabalho. Outros aspectos de interesse abrangem o estudo detalhado do retificador monofásico com filtro capacitivo e o controle da corrente magnetizante do transformador em razão da possibilidade de saturação do núcleo.
LINK:http://www.mediafire.com/file/1uiggdssti8k1w1/METODOLOGIA_DE_PROJETO_DE_INVERSORES.pdf/file

Interlinking Converter Control Techniques to Improve Power Quality in Hybrid AC-DC Microgrids 교류-직류 마이크로그리드 인터링킹 컨버터의 고품질 전력제어기술-AUTHOR PHAN DANG MINH UNIVERSITY OF ULSAN-SOUTH KOREA

UNIVERSITY OF ULSAN-SOUTH KOREA
 Interlinking Converter Control Techniques to Improve Power Quality in Hybrid AC-DC Microgrids by Phan Dang Minh

A Dissertation Submitted to the Graduate School of University of Ulsan in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The Graduate School of University of Ulsan Department of Electrical Engineering.
December 2019

 Abstract 
Hybrid AC-DC microgrids (HMGs) have been studied recently in order to simultaneously exploit AC and DC microgrids (MGs). This dissertation develops control techniques for interlinking converter (IC) which is utilized to link MGs in HMGs. With the proposed control techniques, IC simultaneously manages various AC and DC voltage quality issues along with power flow among MGs. In islanded HMGs, where utility grid is not considered, power quality is seriously degraded with highly distorted bus voltage when nonlinear loads are applied. In order to obtain sinusoidal bus voltage, we propose an IC control scheme which maintains bus voltage by providing harmonic currents caused by the nonlinear load. Moreover, the active power between DC and AC distributed generations (DGs) is also accurately balanced by IC. In the proposed algorithm, the desired IC current is determined by only considering the IC terminal voltage instead of the load current. Consequently, power converters in HMGs are operated autonomously with low system cost because communication links among them are not needed. When AC MG connects to the utility grid, HMGs become grid-connected HMGs. In grid-connected HMGs, we have considered different conditions such as: the abnormal grid voltage, the utilized nonlinear load and the wide variation of DC load power. A versatile IC control strategy is proposed in order to enhance HMGs power quality under such severe conditions. Without implementing any additional hardware compensator, IC with the proposed control scheme can mitigate various issues such as distortion, sag/swell and imbalance in AC voltage and DC bus voltage restoration despite of wide load power variation. Both the desired power and the current among MGs are provided by IC since IC iii current references are generated by only detecting buses voltages. Therefore, AC bus voltage is balanced and sinusoidal with proper magnitude while DC bus voltage is constantly kept at the nominal voltage. In grid-connected HMGs, DC bus voltage is highly ripple when single-phase inverter with variable frequencies (SPI-VF) is operated in DC MG. In order to eliminate the ripple voltage, we present an IC control strategy which can adaptively deal with ripple voltage at different frequencies by controlling IC ripple current. In the proposed approach, instead of SPI current/voltage, only DC bus voltage is required to generate the IC ripple current reference. Besides that, power among MGs is also balanced by controlling IC fundamental current. As a consequence, AC MG can support DC MG in case DC load power changes widely. And DC bus voltage is well maintained at the nominal voltage without ripple. Simulation and experimental results are carried out to validate performance of the proposed IC control techniques.

LINK
http://www.riss.kr/search/Search.do?isDetailSearch=Y&searchGubun=true&queryText=znCreator,%ED%8C%90%EC%9E%A5%EB%AF%BC&colName=bib_t

Low power transformers-R.Khorenovich Balyan -Трансформаторы малой мощности-Роблен Xоренович Бальян

LINK:http://www.mediafire.com/file/v2kprfryq97440d/LOW_POWER_TRANSFORMER.pdf/file

Оптимальное проектирование силовых высокочастотных ферромагнитных устройств-Optimal design of power high-frequency ferromagnetic devices

Оптимальное проектирование силовых высокочастотных ферромагнитных устройств
Авторы: Р.X. Бальян, В.П. Обрусник.
Optimal design of power high-frequency ferromagnetic devices.
 Authors: R.X. Balian, V.P. Litterberry

 Abstract: The book summarizes the modern achievements of science and practice in designing high-frequency ferromagnetic devices (microwave FMU), which include transformers, saturation chokes, phase multipliers, etc. A complete scheme of the engineering design of the microwave FMU is given, based on a small number of simple expressions proposed and proved in the book. Examples of the optimal calculation of high-frequency transformers and inductors up to 200 kVA per phase are given. High accuracy of the final results of designing a microwave FMU for a frequency range of 0.4-100 kHz is guaranteed. For specialists involved in the design of electronic and conversion systems, as well as for university students of electrical and radio engineering profiles.

 Аннотация издательства: В книге обобщены современные достижения науки и практики по проектированию высокочастотных ферромагнитных устройств (СВЧ ФМУ), к которым относятся трансформаторы, дроссели насыщения, умножители числа фаз и т.д. Дается полная схема инженерного проектирования СВЧ ФМУ, базирующаяся на небольшом количестве простых выражений, предложенных и доказанных в книге. Приведены примеры оптимального расчета высокочастотных трансформаторов и дросселей до 200 кВА на фазу. Гарантируется высокая точность конечных результатов проектирования СВЧ ФМУ для диапазона частот 0,4-100 кГц. Для специалистов, занимающихся вопросами проектирования электронных и преобразовательных систем, а также для студентов вузов электротехнического и радиотехнического профилей.
LINK:  http://www.mediafire.com/file/go1qc40yohomjyu/design_of_power_high-frequency_ferromagnetic_devices.pdf/file

Master Degree Thesis Data Analysis and Modeling for Fault Detection in Solar Photovoltaic (PV) System- Mokpo National University Department of Electronics Engineering-Author Prasis - 광전지(PV) 시스템의 고장 탐지를 위한 테이터 분석 및 모델링South Korea

Prasis Poudel A thesis Submitted for Partial Fulfilment of the Requirements for the Degree of Master of Engineering Department of Electronics Engineering 
Graduate School Mokpo National University August, 2017
 광전지(PV) 시스템의 고장 탐지를 위한 데이터
분석 및 모델링

ABSTRACT
This thesis presents the solar (PV) Power output data analysis and modelling using least mean square (LMS), linear regression and multiple linear regression algorithms and comparison between them to find the best model for applying in the PV system Fault detection. This method has been developed and validated using climatic and electrical output obtained from a SANYO 200 Wp photovoltaic modules installed at the Hae-Nam, Korea. This modelling includes the correlation of solar PV power output and solar irradiation. In modelling algorithms, PV power is modelled adaptively as a function of solar irradiation and each model is compared in terms of estimated error performance based on statistical and graphical methods. From the result, it was found that the multiple linear regression modelling is the best for solar PV modelling with MSE 0.00818 with modelling error 1.58% which is less than that compared to the model using the least Mean square (LMS) having 1.97% and linear regression 5.98%. ii | P a g e After successfully modelled, the solar Photovoltaic (PV) power output as a function of solar irradiance, resulting best model is used for the development of practical fault detection. Our modelling results had fairly low complexity with high fault detection rates. The fault detection is based on the analysis of the power losses using the linear regression modelling. The model estimated by stepwise linearity of the PV power output as a function of irradiance. The results obtained from this modelling indicate that the under normal condition the solar radiation and PV power output have a very strong positive correlation and very useful for solar PV data prediction. In addition, the observations below the proposed linear functions are considered as the faulty PV data. From Overall results, we can conclude that this PV system data modelling and fault detection approach is reasonable for PV power estimation and faulty data analysis.
LINK
http://www.riss.kr/search/detail/DetailView.do?p_mat_type=be54d9b8bc7cdb09&control_no=6310cda13afffe46ffe0bdc3ef48d419