Reverse Power Flow Protection in Grid Connected PV Systems

Rahman, Shafin; Aburub, Haneen; Moghaddami, Masood; Sarwat, Arif I.

doi:10.1109/secon.2018.8478882

Cited by 25 publications

(10 citation statements)

References 11 publications

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“…Tabela VIII-Margem de potência reativa da curva QV com o fluxo de potência reverso na segunda vizinhança no sistema real Sul-Sudeste. Como uma margem de potência reativa positiva está associada à instabilidade dinâmica [14], pode-se afirmar que embora o fluxo de potência reverso cause transtornos operacionais para os sistemas de distribuição de energia [8], existem benefícios para os sistemas de transmissão em estudos de estabilidade de tensão.…”

Section: Geradores Fator De Cargaunclassified

“…O fluxo de potência reverso ocorre quando a geração fornecida pelos sistemas de geração distribuída não é consumida, o que provoca absorção de potência pelo barramento de interface entre os sistemas de transmissão e distribuição. Estudos na literatura têm mostrado que o fluxo de potência reverso resulta em problemas operacionais para os sistemas de distribuição de energia elétrica [8,9,10]. A principal contribuição deste artigo é analisar a influência do fluxo de potência reverso em sistemas de transmissão.…”

Section: Introductionunclassified

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Influência De Redes Ativas Em Estudos De Estabilidade De Tensão

Nunes¹,

Souza²,

Borges³

et al. 2021

XIX Conferência De Estudos Em Engenharia Elétrica

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Resumo -Este trabalho busca apresentar uma discussão a respeito da influência do fluxo de potência reverso na margem de potência reativa da curva QV em Sistemas Elétricos de Potência (SEP). Com esse propósito, é mostrado o cálculo da curva QV com e sem a presença do fluxo de potência reverso em dois sistemas elétricos de potência, sistema do IEEE 57 barramentos e um sistema real brasileiro. De acordo com os cálculos realizados foi visto que o fluxo de potência reverso aumenta as margens negativas de potência reativa das curvas QV, o que resulta em uma melhora na estabilidade da tensão dinâmica. Os limites operacionais foram considerados em todas as simulações realizadas.Palavras-Chave -curva QV, estudos de estabilidade de tensão, fluxo de potência reverso.

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Section: Geradores Fator De Cargaunclassified

Section: Introductionunclassified

Influência De Redes Ativas Em Estudos De Estabilidade De Tensão

Nunes¹,

Souza²,

Borges³

et al. 2021

XIX Conferência De Estudos Em Engenharia Elétrica

View full text Add to dashboard Cite

show abstract

“…There, a notable amount of energy is produced locally by distributed photovoltaic plants [14], which on occasion can cause Reverse Power Flow, when unbalances between produced and consumed energy occur. To avoid this abnormal operation [15] [16], electrical vehicles (EVs) will be offered significant incentives to match their EV charging needs with the distribution network's requirements. The actors in the pilot, as depicted in Fig.…”

Section: Grid Balancing With Electrical Vehiclesmentioning

confidence: 99%

Secure Open Federation of IoT Platforms Through Interledger Technologies - The SOFIE Approach

Lagutin¹,

Bellesini²,

Bragatto

et al. 2019

2019 European Conference on Networks and Communications (EuCNC)

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The lack of interoperability among IoT platforms has led to a fragmented environment, where the users and society as a whole suffer from lock-ins, lack of privacy, and reduced functionality. This paper presents SOFIE, a solution for federating the existing IoT platforms in an open and secure manner using Distributed Ledger Technologies (DLTs) and without requiring modifications to the IoT platforms, and describes how SOFIE is used to enable two complex real life pilots: food supply chain tracking from field to fork and electricity distribution grid balancing with guided electrical vehicle (EV) charging. SOFIE's main contribution is to provide interoperability between IoT systems while also enabling new functionality and business models.

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“…However, the generators and their prime movers are always vulnerable to various risks. The majority of the risks stems from the power system interaction on power plants [2][3][4][5]. For this reason, different worthy relays have been utilised to protect synchronous generators and their prime movers.…”

Section: Motivation and Problem Descriptionmentioning

confidence: 99%

Novel fast and secure approach for reverse power protection in synchronous generators

Samami

Azari

2019

IET Electric Power Applications

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The purpose of the reverse power (RP) protection is essentially to prevent severe damage to the generator prime mover. For this aim, directional relays are usually utilised. RP condition (RPC) leads to initial oscillations of power and frequency which might exceed the RP threshold and lead to mal-operation of the relay. Therefore, assigning a time delay is essential to reduce the oscillations. However, this strategy increases the relay trip time, which leads to enhancing the motoring time and the risk of damage to the prime mover. This study proposes a novel algorithm to detect RPC in synchronous generators, based on some easily accessible quantities including active power (P), load angle (δ), internal voltage (E A), terminal voltage (V) and the phase difference between voltage and current (θ). This scheme utilises two criterions including the sign of θ and also comparing V with tangential component of E A on V (E A Cosδ). This algorithm is independent of the size and type of load and is also capable of discriminating RPC with other potential faults. The performance of the proposed approach has been verified with Matlab software and the obtained simulation results show the fastest operation and highest reliability of the proposed technique compared to others.

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Reverse Power Flow Protection in Grid Connected PV Systems

Cited by 25 publications

References 11 publications

Influência De Redes Ativas Em Estudos De Estabilidade De Tensão

Influência De Redes Ativas Em Estudos De Estabilidade De Tensão

Secure Open Federation of IoT Platforms Through Interledger Technologies - The SOFIE Approach

Novel fast and secure approach for reverse power protection in synchronous generators

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