Computational Implementation of Different Anti-Islanding Techniques Based on Frequency Drift for Distributed Generation Systems

Resende, Enio C.; Melo, Fernando Cardoso; Lima, George; Freitas, Luiz Carlos Gomes de

doi:10.1109/isgt-la.2019.8895430

Cited by 2 publications

(3 citation statements)

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“…The main advantage of the AFD algorithm is summarized by its digital implementa tion simplicity, since it can be easily embedded into the inverter microprocessor. How ever, its efficiency depends on the insertion of high rates of THDi [30] and the accuracy o the method can be compromised in the multi-inverter islanding case [31]. Finally, in sev eral comparative papers [24,27,30], Classic AFD spent less time on detection than othe AIP algorithms.…”

Section: Active Frequency Drift (Afd)mentioning

confidence: 99%

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Implementation and Critical Analysis of the Active Phase Jump with Positive Feedback Anti-Islanding Algorithm

2022

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The protection against the unintentional islanding of Grid-Tied inverters is an important electrical security issue addressed by the main Standards. This concern is justified in face of the fact that unintentional islanding can lead to abrupt variations of voltage and frequency, electrical damages, professional accidents, power quality degradation, and out-of-phase reclosure. In response to the islanding concern, the literature has proposed several Anti-Islanding Protection (AIP) schemes that can be divided in passive and active methods. Many of the active AIP is based on the insertion of some disturbance in the inverter current in order to deviate the frequency out of the allowed thresholds, tripping the inverter internal disconnection system. Thus, the main objective of this paper is to analyze the performance of the Active Phase Jump with Positive Feedback (APJPF) algorithm compared to other well-known frequency drift-based solutions. More than that, this work covers the Non-Detection Zone (NDZ) problem, analyzing its main mapping methodologies and the normative requirements, exposing the minimum normative recommendations a given AIP must reach to be considered functional. The last contributions of this paper are the proposal of a parametrization criterion for the Active Frequency Drift with Pulsating Chopping Factor (AFDPCF) and for the APJPF.

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Section: Active Frequency Drift (Afd)mentioning

confidence: 99%

“…However, its efficiency depends on the insertion of high rates of THDi [30] and the accuracy of the method can be compromised in the multi-inverter islanding case [31]. Finally, in several comparative papers [24,27,30], Classic AFD spent less time on detection than other AIP algorithms.…”

Section: Ndz Is the Area Between The Curvesmentioning

confidence: 99%

Implementation and Critical Analysis of the Active Phase Jump with Positive Feedback Anti-Islanding Algorithm

2022

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“…A principal vantagem do método AFD é resumida pela simplicidade de sua implementação digital. No entanto, sua eficácia depende de uma forte injeção de DHTi [28] e perda de desempenho em condições em que o ilhamento ocorre em porções do sistema elétrico com mais de um inversor conectado ao Ponto de Acoplamento Comum (PAC) [29]. Além disso, trabalhos comparativos [21], [22], [28] demonstram que a técnica AFD apresenta tempos de detecção maiores que de outras estratégias descritas na literatura.…”

Section: B Active Frequency Drift (Afd)unclassified

Proposta de uma Nova Estratégia Ativa de Anti-Ilhamento Baseada em Realimentação Positiva de Frequência

Resende¹,

Carvalho²,

Coelho³

et al. 2021

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Resumo-O fenômeno do ilhamento ocorre quando um Sistema de Geração distribuída permanece energizado após a interrupção da rede da concessionária. A ocorrência de ilhamento não intencional pode acarretar em diversos problemas relacionados à segurança dos usuários e operadores do sistema elétrico e perda da qualidade de energia elétrica. Nesse contexto, o presente trabalho apresenta um novo método ativo de Proteção Anti-Ilhamento (PAI) com realimentação positiva de frequência. Para atestar a efetividade da estratégia, será realizado um estudo comparativo entre o algoritmo proposto e outras técnicas conhecidas na literatura: Active Frequency Drift (AFD), Sandia Frequency Shift (SFS) e uma variante do AFD proposta em 2013. Os ensaios experimentais serão realizados empregando um inversor CC-CA de 1 kW, a rede da concessionária e uma carga RLC, projetada segundo as recomendações da norma ABNT NBR 62116. Os resultados obtidos comprovarão que a técnica proposta apresenta uma redução da Zona de Não de Detecção, do tempo de detecção do ilhamento e do conteúdo harmônico inserido na corrente de saída do inversor.

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Computational Implementation of Different Anti-Islanding Techniques Based on Frequency Drift for Distributed Generation Systems

Cited by 2 publications

References 12 publications

Implementation and Critical Analysis of the Active Phase Jump with Positive Feedback Anti-Islanding Algorithm

Implementation and Critical Analysis of the Active Phase Jump with Positive Feedback Anti-Islanding Algorithm

Proposta de uma Nova Estratégia Ativa de Anti-Ilhamento Baseada em Realimentação Positiva de Frequência

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