Comparative analysis of Synchronization Algorithms based on PLL, RDFT and Kalman Filter

Padua, M.S.; Deckmann, S.M.; Sperandio, G.S.; Marafão, Fernando Pinhabel; Colón, Diego

doi:10.1109/isie.2007.4374728

Cited by 44 publications

(20 citation statements)

References 13 publications

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“…Para a proteção e detecção de ilhamento foi implementada uma solução mista com o algoritmo ativo SMS (deslocamento de frequência em modo escorregamento) em conjunto com proteções passivas de sobre/sub tensão e sobre/sub frequência da rede em CA [15]- [17]. Ainda, o algoritmo de injeção de energia na rede (fluxo de potência) opera em sincronia com a rede devido a um algoritmo de sincronização baseado no p-PLL (phase locked-loop) [18] [20], [21]. Para realizar uma conexão segura e suave com a rede de distribuição em CA optou-se por um aumento gradual da potência transferida, tão logo seja verificada a presença da rede em CA.…”

Section: Resultados Experimentaisunclassified

Análise De Estruturas Inversoras Não Isoladas Monofásicas Para Geração Distribuída Fotovoltaica

Brito¹,

Alves²,

Canesin³

2017

Eletrônica de Potência

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Resumo -Este artigo apresenta comparações entre estruturas monofásicas a duplo estágio não isoladas, para aplicações em geração distribuída fotovoltaica (GD-FV), em conexão à rede de distribuição em baixa tensão. Considerando aplicação para GD-FV observou-se vantagens significativas para conversores com características naturais de fonte de corrente para a entrada, fato que reduz a capacitância de desacoplamento do sistema FV. ANALYSIS OF SINGLE-PHASE NON-ISOLATED INVERTER STRUCTURES APPLIED TO PHOTOVOLTAIC DISTRIBUTED GENERATIONAbstract -This paper presents comparisons among non-isolated DC to AC double-stage single-phase structures, applied to photovoltaic distributed generation (PV-DG), suitable to operate connected to the AC electric power network. Considering the PV-DG application, this paper has focused on converters with natural current source input characteristic which allows low capacitance value required for PV power decoupling. Simulation results and qualitative analysis are presented and experimental results from an application are discussed in order to confirm the feasibility of the proposal. The developed prototype is digitally controlled by a DSC, considering the designed firmware for MPPT, and in agreement with NBR-IEC 62116:2012 standard, including islanding and electrical protections.

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Section: Resultados Experimentaisunclassified

Análise De Estruturas Inversoras Não Isoladas Monofásicas Para Geração Distribuída Fotovoltaica

Brito¹,

Alves²,

Canesin³

2017

Eletrônica de Potência

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“…This method assumes a nominal grid frequency fg and extracts frequency components of the grid voltage samples. The DFT of the grid voltage at the (n-1)th and nth samples are used based on equations given by (20) and (21) …”

Section: The Energy Operator Synchronization Algorithmmentioning

confidence: 99%

“…Various methods identified in the literature include the space vector filter (SVF) [17]; Kalman filtering methods [18][19][20][21] and Least Square Estimation methods (WLSE) which has a fast response time and works well with frequency variations [20,[22][23][24][25]. The one regarded as the most stable open-loop method is based on the Discrete Fourier Transform (DFT) [24,26], due to its extended data window length.…”

Section: Introductionmentioning

confidence: 99%

Grid Voltage Synchronization for Unbalanced Voltages Using the Energy Operator

Nwobu

Nakiganda

Zhang

2017

IEEE J. Emerg. Sel. Topics Power Electron.

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Abstract--This paper presents a novel synchronization technique which can identify the grid voltage frequency and phase angle under unbalanced grid voltage conditions. The method combines the features of two different energy operator schemes: the basic one for estimating the frequency of the grid voltages and the cross-energy operator for phase tracking. Using a moving data window of five samples the algorithm can track the fundamental frequency and phase angle quickly and accurately. The paper discusses the fundamental principles of the method, highlights its features and filter requirements in implementation. An experimental implementation of this method is presented which validates its performance for practical operation. The ability of the proposed method to enable a STATCOM riding-through unbalanced grid voltage condition is verified by the results from a power network simulation study.

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“…There are various known methods to track the grid phase based on the grid voltages, such as the zero-crossing detection (ZCD), the phase-locked loop (PLL) and the Kalman filter. A more detailed comparison of these can be found in [29]. In this setup, the PLL-loop is selected.…”

Section: Grid Phase Trackingmentioning

confidence: 99%

Control of offshore marine substation for grid-connection of a wave power farm

Ekström

Leijon

2014

International Journal of Marine Energy

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PostprintThis is the accepted version of a paper published in International Journal of Marine Energy. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Ekström, R., Leijon, M. (2014) Control of offshore marine substation for grid-connection of a wave power farm. AbstractTo grid-connect an offshore wave power farm, an intermediate marine substation is suggested. As a part of the Uppsala University wave power project, a marine substation has been designed, assembled and deployed at sea. The substation is capable of connecting up to seven wave energy converters (WECs), and to transfer the power to the onshore 1kV-grid. In this article, the control procedure for grid connection of the WECs is described step-by-step, and the practical implementations are presented. The system is designed with autonomous control and will connect or disconnect the WECs, depending on the sea state. Fault handling is taken into account, and grid power quality such as harmonic distortion and flicker are considered in the design. Experimental results are presented to verify the system functionalities.

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Comparative analysis of Synchronization Algorithms based on PLL, RDFT and Kalman Filter

Cited by 44 publications

References 13 publications

Análise De Estruturas Inversoras Não Isoladas Monofásicas Para Geração Distribuída Fotovoltaica

Análise De Estruturas Inversoras Não Isoladas Monofásicas Para Geração Distribuída Fotovoltaica

Grid Voltage Synchronization for Unbalanced Voltages Using the Energy Operator

Control of offshore marine substation for grid-connection of a wave power farm

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