Multi-areas optimal reactive power flow

Echeverri, Mauricio Granada; Rider, Marcos J.; Mantovani, José Roberto Sanches; Shahidehpour, M.

doi:10.1109/tdc-la.2008.4641869

Cited by 12 publications

(3 citation statements)

References 16 publications

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“…Another class of solutions makes use of power flow decomposition techniques, such as Lagrangian relaxation or Lagrangian augmentation. This implies to have a unique OPF problem which is decomposed and solved separately for different areas coupled by common constraints, e.g., active and reactive power flows over connection lines, and based on the exchange of Lagrangian multipliers [32]. However, the method is not adequately performant requiring a significant amount of iterations even for simple cases.…”

Section: Coordination Procedures Between Tso and Dsomentioning

confidence: 99%

Optimal Control of Wind Farms for Coordinated TSO-DSO Reactive Power Management

et al. 2018

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Abstract:The growing importance of renewable generation connected to distribution grids requires an increased coordination between transmission system operators (TSOs) and distribution system operators (DSOs) for reactive power management. This work proposes a practical and effective interaction method based on sequential optimizations to evaluate the reactive flexibility potential of distribution networks and to dispatch them along with traditional synchronous generators, keeping to a minimum the information exchange. A modular optimal power flow (OPF) tool featuring multi-objective optimization is developed for this purpose. The proposed method is evaluated for a model of a real German 110 kV grid with 1.6 GW of installed wind power capacity and a reduced order model of the surrounding transmission system. Simulations show the benefit of involving wind farms in reactive power support reducing losses both at distribution and transmission level. Different types of setpoints are investigated, showing the feasibility for the DSO to fulfill also individual voltage and reactive power targets over multiple connection points. Finally, some suggestions are presented to achieve a fair coordination, combining both TSO and DSO requirements.

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Section: Coordination Procedures Between Tso and Dsomentioning

confidence: 99%

Optimal Control of Wind Farms for Coordinated TSO-DSO Reactive Power Management

et al. 2018

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“…As técnicas de decomposição matemáticas em que o problema de FP multi-áreas é resolvido possuem poucas referências na literatura especializada. A maioria delas são aplicadas ao problema de fluxo de potência ótimo (Bakirtzis e Biskas, 2003;Biskas e Bakirtzis, 2006;Conejo e Aguado, 1998;Granada et al, 2008;Kim e Baldick, 1997;Kim et al, 2001;Nogales et al, 2003) . Em Bakirtzis e Biskas (2002) é apresentado um FP-DC descentralizado usando o princípio do problema auxiliar (PPA), no qual um dos objetivos é preservar a confidencialidade dos dados de rede para cada ORS em um mercado de livre concorrência.…”

Section: Revisão Da Literaturaunclassified

Fluxo de potência AC para operação independente de áreas interligadas

Echeverri¹,

Rider²,

Mantovani³

2011

Sba Controle & Automação

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Neste artigo utiliza-se um método de decomposição matemática para resolver um problema de fluxo de carga AC em sistemas de potência compostos de áreas interligadas e administradas por diferentes operadores regionais do sistema elétrico (ORS). A estratégia proposta permite encontrar o ponto de operação de uma determinada área sem conhecer explicitamente os dados da rede das outras áreas interligadas, sendo necessária apenas a troca de informações de fronteira associadas às linhas de interligação. A metodologia baseia-se na decomposição das condições de otimalidade de primeira ordem do fluxo de potência AC que, por sua vez, é formulado como um problema de programação não-linear. Para visualizar melhor o conceito de operação independente de cada ORS, usou-se uma rede neural artificial para simular os cálculos das variáveis de fronteira dos ORS interligados. Um fluxo de carga multi-áreas pode ser visto como uma ferramenta básica que pode ser usada no âmbito de mercados competitivos multi-agentes. O sistema de teste IEEE RTS-96 é utilizado para demonstrar o funcionamento e a eficácia do fluxo de potência AC multi-áreas.

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“…That could be problematic when faced with a large network with many renewable generators whose power outputs depend on unpredictable nature elements like wind and sunlight that could change at any time. Moreover, the number of constraints grow exponentially when the network becomes large [29], therefore at the end it will be nearly impossible to solve an optimal dispatch problem in a centralized way using available computer. Using a decentralized approach to solve the dispatch problem address the shortcomings of centralized dispatch, namely, the exponential growth of the computational and information gathering effort which render centralized dispatch to be unsuitable for real-time application.…”

Section: Introductionmentioning

confidence: 99%

Optimal coordination of vehicle-to-grid batteries and renewable generators in a distribution system

Wang

Sharkh

Chipperfield

2016

Energy

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The increasing penetration of electric vehicles (EVs) and renewable generators (RGs) in the power grid is an inevitable trend to combat air pollution and reduce the usage of fossil fuels. This will challenge distribution networks, which have constrained capacity. However, appropriate dispatch of electric vehicles via vehicle-to-grid (V2G) operation in coordination with the distributed renewable generators can provide support for the grid, reduce the reliance on traditional fossil-fuel generators and benefit EV users. This paper develops a novel agent-based coordinated dispatch strategy for EVs and distributed renewable generators, taking into account both grid's and EV users' concerns and priorities. This optimal dispatch problem is formulated as a distributed multi-objective constraint optimisation problem utilizing the Analytic Hierarchy Process and is solved using a dynamic-programming-based algorithm. The proposed strategy is tested on a modified UK Generic Distribution System (UKGDS). The electricity network model is simplified using a virtual sub-node concept to alleviate the computation burden of a node's agent. Simulation results demonstrate the feasibility and stability of this dispatch strategy.

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Multi-areas optimal reactive power flow

Cited by 12 publications

References 16 publications

Optimal Control of Wind Farms for Coordinated TSO-DSO Reactive Power Management

Optimal Control of Wind Farms for Coordinated TSO-DSO Reactive Power Management

Fluxo de potência AC para operação independente de áreas interligadas

Optimal coordination of vehicle-to-grid batteries and renewable generators in a distribution system

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