Technique for simulating the steady-state response of power electronic converters

Naidu, S.R.; Fernandes, Darlan A.

doi:10.1049/iet-pel.2009.0321

Cited by 14 publications

(8 citation statements)

References 19 publications

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“…The numeric analysis is found in [7,8,10,12,13,14,15]. The numeric analysis observes the system response by inputting parameter values into model.…”

Section: Introductionmentioning

confidence: 99%

“…The approximation may be correct if the switching frequency is high. Since there are some limitation in component, some high frequency is not always reached.The importance of accurate steady-state analysis has already noticed in many researches [7,8,9,10,11,12]. A significant part of the design of circuits requires the simulation of the steady-state response.…”

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confidence: 99%

“…A significant part of the design of circuits requires the simulation of the steady-state response. Parameters such as the gain, harmonic distortion and the input and output impedances are studied in the steady-state mode of operation [7]. Using conventional time-stepping simulations and waiting-time for possible steady state is often not practical because in most cases the time constants of the modes are much larger than the switching period [8].…”

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confidence: 99%

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Accurate Symbolic Steady State Modeling of Buck Converter

Setiawan¹,

Hirata²,

Hodaka³

2017

IJECE

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Steady state analysis is fundamental to any electric and electronic circuit design. Buck converter is one of most popular power electronics circuit and has been analyzed in various situations. Although the behavior of buck converters can be understood approximately by the well-known state space averaging method, little is known in the sense of detailed behavior or exact solution to equations. In this paper a steady state analysis of buck converter is proposed which allows the exact calculation of steady state response. Our exact solution is expressed as a Fourier series. Our result is compared with numerical calculation to be verified. Our method copes with more complicated problems such as describing average power and root-mean-square power that are most critical issues in power electronics circuit.Copyright c 2017 Institute of Advanced Engineering and Science.All rights reserved.Corresponding Author: Ichijo Hodaka Department of Environmental Robotics, University of Miyazaki 1-1, Gakuen Kibanadai-nishi, Miyazaki, 889-2192, Japan Phone: +81 985 587 352 E-mail: hijhodaka[at]cc.miyazaki-u.ac.jp INTRODUCTIONAn analysis of steady-state response of a system is important key in circuit design and control, included dc-dc converter. In convential method, the steady state of dc-dc converter is assumed as the constant value. Many researches based on state space averaging method and high switching frequency assumption observe steady state response [1,2,3,4,5]. The method gives simple way to analyze but some ripples are undescribed clearly. The power electronic handbook approximate linear ripple to analyze dc-dc converter more accurately [6]. The approximation may be correct if the switching frequency is high. Since there are some limitation in component, some high frequency is not always reached.The importance of accurate steady-state analysis has already noticed in many researches [7,8,9,10,11,12]. A significant part of the design of circuits requires the simulation of the steady-state response. Parameters such as the gain, harmonic distortion and the input and output impedances are studied in the steady-state mode of operation [7]. Using conventional time-stepping simulations and waiting-time for possible steady state is often not practical because in most cases the time constants of the modes are much larger than the switching period [8]. In conventional method of dc-dc converter analysis, steady state ripple values are negligible, compared to the steady state values themselves. Switching power converters are inherently nonlinear and consequently it is very difficult to calculate the root-mean-square (RMS) values of the state variable ripple. These RMS values are important in order to calculate the current stresses of the different power converter devices as well as to filter design in order to meet the given specifications [9]. Though power electronic handbook [6] shows the RMS calculation using approximation linear ripple, the result is not absolutely correct due to linear approximation. In order to achieve a ...

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“…The numeric analysis is found in [7,8,10,12,13,14,15]. The numeric analysis observes the system response by inputting parameter values into model.…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Accurate Symbolic Steady State Modeling of Buck Converter

Setiawan¹,

Hirata²,

Hodaka³

2017

IJECE

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“…Distorções harmônicas também são bastante frequentes e são geralmente provocadas por cargas não lineares ligadas à rede elétrica. A maioria das soluções para proteger cargas sensíveis são projetadas exclusivamente para lidar com as elevações e afundamentos e operar para restaurar somente as tensões fundamentais [6]- [8]. O desempenho destas soluções geralmente se deteriora com a presença de harmônicos [9]- [11].…”

Section: Introductionunclassified

Compensação De Tensão Trifásica Em Cargas Sensíveis Baseada Em Um Sistema De Controle Repetitivo E Mínimos Quadrados

Fernandes¹,

Martins²,

Costa³

et al. 2017

Eletrônica de Potência

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Resumo - SENSITIVE THREE-PHASE LOAD VOLTAGE COMPENSATION BASED ON A REPETITIVE AND LEAST-SQUARES CONTROL SYSTEMAbstract -In this work, it is suggested a repetitivebased control technique to dynamically restore voltages across critical loads connected to the power grid. The technique is intrinsically able for dealing with harmonics distortions and it is realized with only one transfer function. Therefore, there is no need of using harmonic selective filters. Moreover, the technique is capable of tracking sinusoid references which turns unnecessary the Park transformation, usually applied in control schemes of three-phase converters. A recursive least-square algorithm is also aggregated to assure proper synchronization of the voltages to be restored. The control system design along with its stability are discussed. The experimental results are produced through a setup of a series three-phase compensator. These scenarios for disturbed voltages are the same for the experiments and simulations. The results endorse the proposal and encourage further investigations.

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“…Distorções harmônicas também são bastante comuns e são geralmente provocadas por cargas não-lineares ligadas à rede elétrica. Na literatura, observa-se que a maioria das soluções de consumidores para proteger cargas sensíveis são projetadas exclusivamente para lidar com as elevações e afundamentos para restaurar as tensões fundamentais [10], [11]. O desempenho de tais soluções geralmente se deteriora na presença de harmônicos [12], [13].…”

Section: Introductionunclassified

Compensação Série Com Mínima Injeção De Potência Ou De Tensão Baseada Em Controle Repetitivo

Fernandes¹,

Costa²,

Martins³

et al. 2017

Eletrônica de Potência

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Resumo -Este trabalho propõe a utilização de um controle repetitivo para restaurar de forma dinâmica a tensão aplicada a cargas sensíveis e conectadas na rede elétrica. Além de compensar afundamentos e elevações de tensão, o controle proposto pode corrigir distorções harmônicas. Ainda, é capaz de trabalhar em referências senoidais, e assim, evita a necessidade do emprego de transformadas dq. SERIES COMPENSATION WITH MINIMUM POWER OR VOLTAGE INJECTION BASED ON REPETITIVE CONTROLAbstract -This paper proposes a control technique to be applied in a series compensator which dynamically maintain the voltage across critical loads connected to the power grid in nominal value. The technique is capable of dealing with voltage sags, swells and harmonic distortions. Furthermore, it is suitable for tracking sinusoid references, avoiding the employment of axes transformations and allowing control tuning for each phase separately. It is also proposed the integration of a recursive least-squares to synchronize the reference signals to the compensating voltages. These voltages, then, can be controlled for achieving two different objectives. In I. INTRODUÇÃOEm um cenário atual, a rede elétrica tem recebido um número crescente de cargas não-lineares e geradores distribuídos. Esta tendência coloca inúmeros desafios às concessionárias de energia e seus clientes. A proteção das cargas críticas a variações é um desses desafios, pois a rede elétrica está propensa a ter distorções de tensão causadas por estes geradores ou distorções harmônicas provocadas por não-linearidades presentes na rede [1]- [3]. As cargas críticas são aquelas em que a energia deve ser fornecida ininterruptamente em condições senoidais nominais. Exemplos destas cargas são centrais de dados, equipamentos hospitalares, máquinas controladas por computadores e acionamentos a velocidade variável.Existem duas possibilidades que podem ser aplicadas para proteger cargas sensíveis ou críticas na rede elétrica. Na primeira, o objetivo é melhorar a flexibilidade da rede de energia em ações como a redundância de fornecimento, aperfeiçoamento dos procedimentos de manutenção ou substituição de equipamentos obsoletos ou antigos [4], [5]. Essas ações são baseadas na configuração da rede e, geralmente, são tomadas pelas concessionárias de energia, que são agentes centrais para o sistema. A outra possibilidade é complementar à primeira e procura soluções locais. Entre as diversas soluções descritas na literatura, a utilização de compensadores séries ou restauradores dinâmicos de tensão para manter a tensão nominal na carga crítica, é bastante conhecida [6]- [8].A função básica de um compensador série é proteger cargas críticas contra distúrbios de tensão da rede. Os distúrbios mais comuns são os afundamentos e elevações de tensão [9]. Distorções harmônicas também são bastante comuns e são geralmente provocadas por cargas não-lineares Eletrôn. Potên., Campo Grande, v. 22, n. 3, p. 279-287, jul./set. 2017

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Technique for simulating the steady-state response of power electronic converters

Cited by 14 publications

References 19 publications

Accurate Symbolic Steady State Modeling of Buck Converter

Accurate Symbolic Steady State Modeling of Buck Converter

Compensação De Tensão Trifásica Em Cargas Sensíveis Baseada Em Um Sistema De Controle Repetitivo E Mínimos Quadrados

Compensação Série Com Mínima Injeção De Potência Ou De Tensão Baseada Em Controle Repetitivo

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