The Experts below are selected from a list of 3252 Experts worldwide ranked by ideXlab platform

J Gurney - One of the best experts on this subject based on the ideXlab platform.

  • voltage stability monitoring based on the concept of coupled single port circuit
    Power and Energy Society General Meeting, 2012
    Co-Authors: Yunfei Wang, Iraj Rahimi Pordanjani, Tongwen Chen, Ebrahim Vaahedi, J Gurney
    Abstract:

    Summary form only given: This paper reveals that the impedance match (or the Thevenin circuit) based voltage stability monitoring techniques have problems to predict voltage stability limits when applied to multi-load power systems. Power system loads are nonlinear and dynamic. They cannot be simply represented as Thevenin circuit parameters for impedance match analysis. To overcome these difficulties, a new concept called “coupled single-port circuit” is proposed in this paper. The concept decouples a Meshed Network into individual single generator versus single bus Network and, as a result, a modified version of the impedance match theorem can be used. This leads to a real-time voltage stability monitoring scheme without the need to estimate Thevenin parameters. The scheme can estimate voltage stability margin and identify weak areas in a system based on the SCADA and PMU data. Case studies conducted on several test systems have verified the validity of the proposed method.

  • voltage stability monitoring based on the concept of coupled single port circuit
    IEEE Transactions on Power Systems, 2011
    Co-Authors: Yunfei Wang, Iraj Rahimi Pordanjani, Tongwen Chen, Ebrahim Vaahedi, J Gurney
    Abstract:

    This paper reveals that the impedance match (or the Thevenin circuit) based voltage stability monitoring techniques have problems to predict voltage stability limits when applied to multi-load power systems. Power system loads are nonlinear and dynamic. They cannot be simply represented as Thevenin circuit parameters for impedance match analysis. To overcome these difficulties, a new concept called “coupled single-port circuit” is proposed in this paper. The concept decouples a Meshed Network into individual single generator versus single bus Network and, as a result, a modified version of the impedance match theorem can be used. This leads to a real-time voltage stability monitoring scheme without the need to estimate Thevenin parameters. The scheme can estimate voltage stability margin and identify weak areas in a system based on the SCADA and PMU data. Case studies conducted on several test systems have verified the validity of the proposed method.

Gianluca Fulli - One of the best experts on this subject based on the ideXlab platform.

  • opf solution for a real czech urban Meshed distribution Network using a genetic algorithm
    Sustainable Energy Grids and Networks, 2021
    Co-Authors: Ladislav Foltyn, Jan Vysocký, Giuseppe Prettico, Michal Běloch, Pavel Praks, Gianluca Fulli
    Abstract:

    Abstract Electrical distribution Networks are facing an energy transition which entails an increase of decentralised renewable energy sources and electric vehicles. The resulting temporal and spatial uncertainty in the generation/load patterns challenges the operations of an infrastructure not designed for such a transition. In this situation, Optimal Power Flow methods can play a key role in identifying system weak points and supporting efficient management of the electrical Networks, including the distribution level. In this work, to support distribution system operators’ decision-making process, we aim at attaining a quasi-optimal solution in the shortest time possible in an electrical Network experiencing a large growth of distributed energy sources. We propose an optimisation method based on a modified version of a genetic algorithm and the Python pandapower package. The method is tested on a model of a real urban Meshed Network of a large Czech city. The optimisation method minimises the total operating costs of the distribution Network by controlling selected Network components and parameters, namely the transformer tap changers and the active power demand at consumption nodes. The results of our method are compared with the exact solution showing that a close-to-optimal solution of the observed problem can be reached in a relatively short time.

Yunfei Wang - One of the best experts on this subject based on the ideXlab platform.

  • voltage stability monitoring based on the concept of coupled single port circuit
    Power and Energy Society General Meeting, 2012
    Co-Authors: Yunfei Wang, Iraj Rahimi Pordanjani, Tongwen Chen, Ebrahim Vaahedi, J Gurney
    Abstract:

    Summary form only given: This paper reveals that the impedance match (or the Thevenin circuit) based voltage stability monitoring techniques have problems to predict voltage stability limits when applied to multi-load power systems. Power system loads are nonlinear and dynamic. They cannot be simply represented as Thevenin circuit parameters for impedance match analysis. To overcome these difficulties, a new concept called “coupled single-port circuit” is proposed in this paper. The concept decouples a Meshed Network into individual single generator versus single bus Network and, as a result, a modified version of the impedance match theorem can be used. This leads to a real-time voltage stability monitoring scheme without the need to estimate Thevenin parameters. The scheme can estimate voltage stability margin and identify weak areas in a system based on the SCADA and PMU data. Case studies conducted on several test systems have verified the validity of the proposed method.

  • voltage stability monitoring based on the concept of coupled single port circuit
    IEEE Transactions on Power Systems, 2011
    Co-Authors: Yunfei Wang, Iraj Rahimi Pordanjani, Tongwen Chen, Ebrahim Vaahedi, J Gurney
    Abstract:

    This paper reveals that the impedance match (or the Thevenin circuit) based voltage stability monitoring techniques have problems to predict voltage stability limits when applied to multi-load power systems. Power system loads are nonlinear and dynamic. They cannot be simply represented as Thevenin circuit parameters for impedance match analysis. To overcome these difficulties, a new concept called “coupled single-port circuit” is proposed in this paper. The concept decouples a Meshed Network into individual single generator versus single bus Network and, as a result, a modified version of the impedance match theorem can be used. This leads to a real-time voltage stability monitoring scheme without the need to estimate Thevenin parameters. The scheme can estimate voltage stability margin and identify weak areas in a system based on the SCADA and PMU data. Case studies conducted on several test systems have verified the validity of the proposed method.

Ladislav Foltyn - One of the best experts on this subject based on the ideXlab platform.

  • opf solution for a real czech urban Meshed distribution Network using a genetic algorithm
    Sustainable Energy Grids and Networks, 2021
    Co-Authors: Ladislav Foltyn, Jan Vysocký, Giuseppe Prettico, Michal Běloch, Pavel Praks, Gianluca Fulli
    Abstract:

    Abstract Electrical distribution Networks are facing an energy transition which entails an increase of decentralised renewable energy sources and electric vehicles. The resulting temporal and spatial uncertainty in the generation/load patterns challenges the operations of an infrastructure not designed for such a transition. In this situation, Optimal Power Flow methods can play a key role in identifying system weak points and supporting efficient management of the electrical Networks, including the distribution level. In this work, to support distribution system operators’ decision-making process, we aim at attaining a quasi-optimal solution in the shortest time possible in an electrical Network experiencing a large growth of distributed energy sources. We propose an optimisation method based on a modified version of a genetic algorithm and the Python pandapower package. The method is tested on a model of a real urban Meshed Network of a large Czech city. The optimisation method minimises the total operating costs of the distribution Network by controlling selected Network components and parameters, namely the transformer tap changers and the active power demand at consumption nodes. The results of our method are compared with the exact solution showing that a close-to-optimal solution of the observed problem can be reached in a relatively short time.

Riva E Sanseverino - One of the best experts on this subject based on the ideXlab platform.

  • a backward sweep method for power flow solution in distribution Networks
    International Journal of Electrical Power & Energy Systems, 2010
    Co-Authors: A Augugliaro, L Dusonchet, S Favuzza, M G Ippolito, Riva E Sanseverino
    Abstract:

    Abstract A methodology for the analysis of radial or weakly Meshed distribution systems supplying voltage dependent loads is here developed. The solution process is iterative and, at each step, loads are simulated by means of impedances. Therefore, at each iteration, it is necessary to solve a Network made up only of impedances; for this kind of Network, all the voltages and currents can be expressed as linear functions of a single unknown current (in radial systems) or of two unknown currents for each independent mesh (for Meshed systems). The methodology has been called “backward” since the unique equation, in case of radial Network, and the linear system of equations, in case of Meshed Network, in which such unknown currents appear can be determined by starting from the ending nodes of the radial system, or of the radialized Network (obtained by means of cuts in Meshed Networks). After a brief presentation of the b/f method, which is currently the most commonly used technique for solving distribution Networks, the solution methodology is detailed both for radial and for Meshed systems. Then, the way in which PV nodes can be considered is also described. Finally, the results obtained in the solution of some Networks already studied in the literature are presented with other methods, in order to compare their performances. The applications show the efficiency of the proposed methodology in solving distribution Networks with many meshes and PV nodes.