Risks From Utility Supply Disruption

Dalke, G.; Baum, A S; Bailey, B.; Daley, James M.; Duncan, Brent; Fischer, J.; Hesla, Erling; Hoerauf, R.; Hornbarger, B.; Lee, W; Love, D.J.; McCullough, Don; Mozina, Charles J.; Nichols, N.; Padden, Lorraine K.; Patel, S.; Pierce, A.; Pillai, P.; Poletto, G.; Rifaat, Rasheek; Sanders, M.K.; Shelton, John M.; Stringer, T.N.; Weber, Jens H.; Wu, Alex Y.; Young, R.; Powell, L.J.

doi:10.1109/mias.2010.939426

Cited by 9 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For DGs planned to still supply designated loads after loss of the grid, the proper speed governor mode for parallel operation is droop control. This is because that operating in modes such as constant power or constant export/import may lead to collapse of the islanded system with the commencement of disconnection from main utility . The excitation system in grid‐connected operation should not control the voltage because frequent reactive power variations triggered by changes in utility voltage will be unavoidable for the small capacity of DGs when compared with the grid.…”

Section: Studied System: Scheme Description and Control System Modelsmentioning

confidence: 99%

“…When working in parallel (grid‐connected), the DG control should not respond to changes in utility's frequency and voltage magnitude deviations; otherwise, instability and equipment damage may threaten the DG unit . However, in stand‐alone mode (grid‐disconnected), the DG unit should maintain frequency and voltage of the microgrid due to absence of utility support, thus emerging the need for a change in control mode of the DG.…”

Section: Introductionmentioning

confidence: 99%

“…Although grid reconnection detection could be performed via breaker status communication (transfer trip) or power line carrier‐based methods, introduced in , these methods are considered to be expensive for DGs on a utility circuit. This is mainly for expensive signal generators used in power line carrier‐based methods of and similarly for the cost of the transfer trip scheme and its communication channel . Moreover, schemes based on breaker status communication must adapt to topology changes in the system, and the adaptation results in poor reliability of the system while it requires many communication links .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Grid reconnection detection for synchronous distributed generators in stand-alone operation

Jouybari-Moghaddam

Hosseinian

Vahidi

2013

Int. Trans. Electr. Energ. Syst.

View full text Add to dashboard Cite

Summary Industrial plants/commercial facilities with synchronous generation, seek reliable and continuous operation even at the time of grid outages. Thus, islanding detection methods have been proposed in the literature that can be used to change the operating mode of the employed distributed generators from grid‐parallel to stand‐alone. Among the few solutions previously presented for switching the control mode in the reverse event of reconnecting to the grid, the method presented in this paper is unique. This grid‐reconnection detection technique is low cost, fast, and does not interact with the power quality of the island although it only uses one, locally measured, variable. The method implies processing of oscillatory modes in frequency signal and is independent of the autonomous island's boundary. The investigation also includes a discussion on similar event of merging of adjacent islands. Simulations confirm the successful discrimination between reconnection event and other switching/power quality events. Copyright © 2013 John Wiley & Sons, Ltd.

show abstract

Section: Studied System: Scheme Description and Control System Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Grid reconnection detection for synchronous distributed generators in stand-alone operation

Jouybari-Moghaddam

Hosseinian

Vahidi

2013

Int. Trans. Electr. Energ. Syst.

View full text Add to dashboard Cite

show abstract

“…Possible initial cause was that storms in the isolated area led to outages of several lines. Islanding occurs when a part of a power interconnection containing generation and load is isolated from the remainder of the system [8]. If multiple disturbances occur, synchronism of interconnected power systems could be destroyed, in which case out-of-step protection systems can help to detect angular instability and isolate the asynchronous part to preserve stability [9].…”

Section: Three-phase Faultmentioning

confidence: 99%

Monitoring the North American interconnections at distribution level

Dong

Xia

Zhang

et al. 2009

2009 IEEE Power &Amp; Energy Society General Meeting

View full text Add to dashboard Cite

The North American Frequency Monitoring Network (FNET) is a wide-area measurement system that monitors the North American Interconnections at distribution voltage level. A situational awareness system has been implemented on the server located at Virginia Tech to detect and analyze power system disturbances in near-real time. This paper demonstrates the viability of monitoring bulk transmission systems at a very low voltage level by discussing several major disturbances in the Eastern Interconnection (EI) observed by FNET. Important parameters of power systems, such as frequency, voltage and phase angle, are examined to understand system behavior during disturbances. The recordings and analysis show that a great deal of valuable information about dynamics in transmission systems can be obtained at a lower voltage level. The disturbance location estimation is also analyzed as an application of the distribution-level measurements.

show abstract

“…Como a ocorrência de um ilhamento não intencional no SEP é inevitável e imprevisível, são necessários estudos de técnicas de detecção de ilhamento para manter o funcionamento adequado da RD. A magnitude, a taxa e a duração dessas mudanças de frequência afetam a capacidade de detectar uma condição de ilhamento (DALKE et al, 2011). Devido a esses fatores, diversas normas e recomendações estabelecem que a desconexão da GD após a ocorrência de ilhamentos deve ser realizada rapidamente.…”

Section: Tabelaunclassified

Análise dos tempos máximos de chaveamento dos modos de operação de um grupo gerador diesel após ilhamento

Agnoletto¹

View full text Add to dashboard Cite

Agradeço a Deus em primeiro lugar, por ter me dado a oportunidade para o desenvolvimento deste trabalho. Aos meus pais, à minha irmã e à toda minha família pelo incentivo, apoio, confiança depositada em mim, pelos conselhos e palavras de motivação nos momentos mais difíceis. À minha namorada Thais pelo carinho, amizade, apoio, paciência e compreensão durante os períodos difíceis deste mestrado. À minha orientadora Prof a. Vilma Alves de Oliveira, pela amizade, pelos conselhos, pela orientação durante todo o período deste trabalho e pelos momentos de descontração vividos. Ao Prof. Ricardo Quadros Machado, pela amizade, pelo apoio concedido ao longo deste período, pelas ideias, sugestões e pelos momentos divertidos. Ao Prof. José Carlos de Melo Vieira Júnior, pela amizade, pela contribuição neste trabalho por meio de ideias, sugestões, críticas e pelo conhecimento transferido. A todos os meus amigos do Laboratório de Controle, especialmente ao Rodolpho, pela recepção, pela amizade, pela paciência nas explicações e por todo conhecimento transferido. A todas as amizades que tive o prazer de fazer em São Carlos. À Escola de Engenharia de São Carlos pelo suporte fornecido no decorrer deste trabalho e ao CNPq pela bolsa de estudo concedida. Palavras-chave: Geração distribuída. Controle fuzzy. Operação no modo ilhado. Gerador síncrono. Geração a diesel.

show abstract

Risks From Utility Supply Disruption

Cited by 9 publications

References 3 publications

Grid reconnection detection for synchronous distributed generators in stand-alone operation

Grid reconnection detection for synchronous distributed generators in stand-alone operation

Monitoring the North American interconnections at distribution level

Análise dos tempos máximos de chaveamento dos modos de operação de um grupo gerador diesel após ilhamento

Contact Info

Product

Resources

About