Efficient Coordination of ROCOF and Frequency Relays for Distributed Generation Protection by Using the Application Region

Vieira, José Carlos M.; Freitas, Walmir; Xu, Wilsun; Morelato, A.

doi:10.1109/tpwrd.2006.881588

Cited by 114 publications

(71 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Distributed generation is usually the main access to the distribution network, would be the distribution network The impact on many aspects, such as: for power quality, grid reliability, short-circuit current protection effects and so on [7]. Distributed generation, such as wind power, solar power, adopted a lot of power electronic devices, such as inverters, their design and application design conditions than are strictly prohibited by a large current, which leads to lack of protection required to trigger a short circuit capacity.…”

Section: Distributed Generationmentioning

confidence: 99%

The Impact of Distributed Generation on the Protection of Distribution Network

Zhao¹,

Liu²,

Yang³

2015

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

View full text Add to dashboard Cite

Abstract-Distributed power access to change the trend and fault characteristics of traditional distribution network, the existing distribution network protection caused a huge impact. To meet the distributed power of access, protection methods must examine with the grid. After the analysis of distributed power grid access with fault current characteristics and classification of different principles expounded distributed power distribution grid Protection. On the basis of the distribution network including distributed power protection configuration overview home and abroad, analysis and discussion of existing methods of protection and pointed out the direction of development of distribution network protection configuration. Further research is distributed power grid access with protection configuration to provide ideas for the ultimate realization of the future distribution network safe, reliable operation.

show abstract

Section: Distributed Generationmentioning

confidence: 99%

The Impact of Distributed Generation on the Protection of Distribution Network

Zhao¹,

Liu²,

Yang³

2015

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

View full text Add to dashboard Cite

show abstract

“…In this case, the local frequency and voltage level may remain steady and within statutory limits such that the accidental island is not detected within the required time (2 seconds by IEEE 1547 [17]) or possibly not at all. The boundary of active (P) and reactive (Q) power match which defines the region of such non-detection is called the non-detection zone (NDZ) of the relay [18][19][20]. The NDZ for inverter-connected generation is dominated by the inverter interface control software and the PLL dynamics.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the varying size of the NDZ reported by previous works such as [8][9][10][11][12][13][14][15][18][19][20] highlights how the size of the NDZ is heavily influenced by the architecture of the control loops determining the DG real and reactive power export; i.e. the prime mover governor/throttle and the automatic voltage regulator (AVR) and field.…”

Section: Introductionmentioning

confidence: 99%

Avoiding the Non-Detection Zone of Passive Loss-of-Mains (Islanding) Relays for Synchronous Generation by Using Low Bandwidth Control Loops and Controlled Reactive Power Mismatches

Roscoe

Burt

Bright

2014

IEEE Trans. Smart Grid

View full text Add to dashboard Cite

This version is available at https://strathprints.strath.ac.uk/46054/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Abstract-Generation connected to electrical distribution systems requires reliable and timely detection of loss-of-mains (islanding). Passive loss-of-mains detection relays typically usemeasurements of parameters such as frequency, phase, and the magnitudes of voltage and current. If a part of the power network becomes islanded and there is a very close match between generation and demand of both active and reactive power, there is a risk that the relay will not be able to detect the loss-of-mains (LOM) event quickly, or perhaps at all. This is the "non-detection zone" or NDZ. This paper proposes a combination of 2 generator control techniques which allow the NDZ to be avoided even when the generator has significant inertia. Firstly, the natural instability (when islanded) of a grid-connected control scheme consisting of integral and droop controls is recognized and exploited. Secondly, a simple strategy is added which makes occasional small, steady-state adjustments to the reactive power output of the generator. The scheme has been tested in the laboratory and shows that the 2 second detection time required by IEEE 1547 can be achieved, even when an exact match of active power generation and demand is initially configured, and the generator has a significant inertia.

show abstract

“…Em [17] é apresentada a coordenação entre a função de sub/sobrefrequência (81U/O) e a função 81R para detecção de ilhamento utilizando curvas de desempenho. Posteriormente o ajuste é avaliado para casos de curto-circuito e chaveamentos de carga.…”

Section: Segundo O Primeiro Módulo Dos Procedimentos De Distribuição unclassified

“…Assim como a função de frequência, pode apresentar bloqueio de tensão e temporização, a depender do relé comercial utilizado [60]; [61]. Algumas aplicações são verificadas em [17]; [49]; [59].…”

Section: Função De Proteção 81runclassified

Metodologias de ajuste das proteções anti-ilhamento de geradores distribuídos considerando múltiplos eventos

Motter¹

View full text Add to dashboard Cite

AgradecimentoAgradeço acima de tudo a Deus pela oportunidade de desenvolver esta pesquisa.A minha família pelo apoio e incentivo, e a minha companheira Vivian pelo carinho, dedicação, paciência e compreensão durante todos os momentos.Ao Prof. Dr. José Carlos de Melo Vieira Júnior, pela excelente orientação e correções, por toda a paciência, dedicação e amizade, e pela confiança ao me aceitar como seu orientado.Suas contribuições e conselhos foram além do conhecimento técnico, e ajudaram no meu desenvolvimento pessoal e profissional. Os geradores distribuídos em sistemas de distribuição de energia elétrica devem ser desconectados em eventos de ilhamento, que ocorrem quando parte da rede elétrica torna-se eletricamente isolada da concessionária e o subsistema isolado continua a ser energizado pela geração distribuída. A proteção anti-ilhamento deve detectar tal condição operativa, porém pode não atuar em condições de pequenos desbalanços entre carga e geração, ou atuar incorretamente para eventos de outra natureza. Assim, um ajuste adequado dessa proteção deve desconectar o gerador rapidamente quando detecta o ilhamento e, simultaneamente, deve ser imune a eventos como curtos-circuitos e chaveamentos de carga, por exemplo. Esta pode ser uma tarefa muito difícil face às variações de carga e diferentes eventos de não ilhamento que podem ocorrer no sistema de distribuição. Portanto, nesta tese são propostas metodologias de ajuste das funções de proteção anti-ilhamento de sub/sobrefrequência, taxa de variação de frequência, salto de vetor e sub/sobretensão, que são técnicas convencionalmente utilizadas para a detecção de ilhamento de geração distribuída. O objetivo das metodologias é maximizar a detecção de ilhamento e minimizar a atuação incorreta, e são considerados cenários com múltiplos geradores distribuídos de diferentes tecnologias. Inicialmente, são explorados os principais fatores que afetam as proteções, tais como distribuição das cargas, fator de potência e desequilíbrio das cargas. Esta análise permite identificar os casos mais difíceis de detecção de ilhamento. Como segunda contribuição, foi proposta a metodologia de análise gráfica denominada Mapa de Ajustes, cuja eficácia foi comprovada por meio de casos de teste, mostrando ser capaz de melhorar a sensibilidade da proteção anti-ilhamento e minimizar atuação incorreta. Na sequência, é apresentado um método automático para ajuste e bloqueio de tensão e outro baseado em proteção adaptativa para ajuste das funções de Distributed generators in power distribution systems must be disconnected after an islanding event, which occurs when part of the power grid becomes electrically isolated from the utility and the isolated subsystem continues to be energized by the distributed generation. The antiislanding protection has to detect such operating condition, which may fail for critical loading conditions, or operate incorrectly for events of other nature than islanding. Therefore, an appropriate protection setting should quickly disconnect the generator when an ...

show abstract

Efficient Coordination of ROCOF and Frequency Relays for Distributed Generation Protection by Using the Application Region

Cited by 114 publications

References 3 publications

The Impact of Distributed Generation on the Protection of Distribution Network

The Impact of Distributed Generation on the Protection of Distribution Network

Avoiding the Non-Detection Zone of Passive Loss-of-Mains (Islanding) Relays for Synchronous Generation by Using Low Bandwidth Control Loops and Controlled Reactive Power Mismatches

Metodologias de ajuste das proteções anti-ilhamento de geradores distribuídos considerando múltiplos eventos

Contact Info

Product

Resources

About