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Daniela Proto - One of the best experts on this subject based on the ideXlab platform.

  • A fuel cell-based Dispersed Generation system providing system ancillary services through power electronic interfaces
    Renewable Energy, 2011
    Co-Authors: R. Angelino, Antonio Bracale, Guido Carpinelli, M. Mangoni, Daniela Proto
    Abstract:

    Recent advances in power electronic technology for interfacing Dispersed energy resources to distribution grids offer potential solutions to several technical and economical problems in distribution networks. In particular, Dispersed Generation (DG) can be used to provide the usual energy service as well as some ancillary services, such as load following, back-up service, and compensation of Power Quality disturbances. In this paper, a fuel cell-based DG system is proposed for providing energy and ancillary services. The novelty of the system is that it can operate with a ‘system strategy’ (aimed at compensating for the disturbances in the whole system or in some privileged areas of the network) thanks to a suitable control technique of the power electronic interfaces. In this way, the benefits of using the Dispersed Generation system are maximized. Computer simulations were performed on an actual distribution grid to demonstrate the effectiveness of the compensation actions.

  • Distribution Networks with Linear and Nonlinear Loads: Cost-Based Method for Planning Dispersed Generation and Capacitor Units under Uncertainty
    Journal of Energy Engineering, 2011
    Co-Authors: Claudia Battistelli, Guido Carpinelli, Daniela Proto, Fabio Mottola, D. Zoppoli
    Abstract:

    This paper discusses the optimal allocation of capacitors and Dispersed Generation units in a medium-voltage distribution system with linear and nonlinear loads. An optimization problem is formulated and solved for optimal siting and sizing, with the objective of minimizing costs sustained by the distributor for reactive power service, even containing the impact of the waveform distortions. A three-step procedure, based on genetic algorithm and decision theory, is applied to obtain a solution for the optimization problem that takes into account the unavoidable uncertainties that the Dispersed Generation production and the loads introduce. The numeric applications performed on an 18-bus test distribution system demonstrate of the effectiveness of the proposed procedure.

  • Dispersed Generation units providing system ancillary services in distribution networks by a centralised control
    IET Renewable Power Generation, 2011
    Co-Authors: Antonio Bracale, R. Angelino, Guido Carpinelli, M. Mangoni, Daniela Proto
    Abstract:

    This study considers a distribution system with a number of Dispersed Generation (DG) units interconnected to the AC grid through power electronic interfaces. Some selected DG units were able to provide energy service and system ancillary services (in particular, voltage regulation and partial compensation or elimination of some power quality disturbances, such as waveform distortions and voltage unbalances) through a proper centralised control system that provides the reference signals to the converters of the DG units in real time. In addition, the problem of time delays owing to data acquisition and digital signal processing for reference signal calculations and the effects of these delays on compensation actions were studied. Several time-domain simulations of an actual distribution system are reported, taking into account different DG units and time-delay scenarios.

  • Dispersed Generation and storage systems for providing ancillary services in distribution systems
    SPEEDAM 2010, 2010
    Co-Authors: R. Angelino, Guido Carpinelli, Daniela Proto, Antonio Bracale
    Abstract:

    In this paper, the problem of the use of Dispersed Generation (DG) for providing ancillary services in electrical distribution systems is addressed. Fuel cell-based, photovoltaic cell-based, and wind Generation systems are connected to the distribution network through power electronic interfaces, each with a proper storage system for the optimal grid operation. Thanks also to the storage system, the DG units are able to provide ancillary services such as load following, back-up, peak shaving, reactive power support and power quality disturbance compensation. A centralized control system coordinates the DG units. Time domain simulations on an actual distribution system are reported and discussed.

  • On the Evaluation of Power Quality Indices in Distribution Systems with Dispersed Generation
    Renewable energy & power quality journal, 2009
    Co-Authors: Daniela Proto, Antonio Bracale, Guido Carpinelli, Annarita Di Fazio
    Abstract:

    The increasing penetration of Dispersed Generation (DG) influences the power quality (PQ) levels in the distribution networks. Then, an accurate assessment of PQ disturbances in presence of DG is needed and adequate probabilistic indices should be adopted to properly quantify the random nature of the disturbances. In this paper, a tool for the calculation of slow voltage variations, waveform distortions, unbalances, voltage fluctuations and voltage sag probabilistic indices has been developed by using DigSilent Power Factory software. Numerical applications are performed on a 120-bus distribution network whose DG units are wind generators and gas turbine units.

M Wydra - One of the best experts on this subject based on the ideXlab platform.

Antonio Bracale - One of the best experts on this subject based on the ideXlab platform.

  • A fuel cell-based Dispersed Generation system providing system ancillary services through power electronic interfaces
    Renewable Energy, 2011
    Co-Authors: R. Angelino, Antonio Bracale, Guido Carpinelli, M. Mangoni, Daniela Proto
    Abstract:

    Recent advances in power electronic technology for interfacing Dispersed energy resources to distribution grids offer potential solutions to several technical and economical problems in distribution networks. In particular, Dispersed Generation (DG) can be used to provide the usual energy service as well as some ancillary services, such as load following, back-up service, and compensation of Power Quality disturbances. In this paper, a fuel cell-based DG system is proposed for providing energy and ancillary services. The novelty of the system is that it can operate with a ‘system strategy’ (aimed at compensating for the disturbances in the whole system or in some privileged areas of the network) thanks to a suitable control technique of the power electronic interfaces. In this way, the benefits of using the Dispersed Generation system are maximized. Computer simulations were performed on an actual distribution grid to demonstrate the effectiveness of the compensation actions.

  • Dispersed Generation units providing system ancillary services in distribution networks by a centralised control
    IET Renewable Power Generation, 2011
    Co-Authors: Antonio Bracale, R. Angelino, Guido Carpinelli, M. Mangoni, Daniela Proto
    Abstract:

    This study considers a distribution system with a number of Dispersed Generation (DG) units interconnected to the AC grid through power electronic interfaces. Some selected DG units were able to provide energy service and system ancillary services (in particular, voltage regulation and partial compensation or elimination of some power quality disturbances, such as waveform distortions and voltage unbalances) through a proper centralised control system that provides the reference signals to the converters of the DG units in real time. In addition, the problem of time delays owing to data acquisition and digital signal processing for reference signal calculations and the effects of these delays on compensation actions were studied. Several time-domain simulations of an actual distribution system are reported, taking into account different DG units and time-delay scenarios.

  • Dispersed Generation and storage systems for providing ancillary services in distribution systems
    SPEEDAM 2010, 2010
    Co-Authors: R. Angelino, Guido Carpinelli, Daniela Proto, Antonio Bracale
    Abstract:

    In this paper, the problem of the use of Dispersed Generation (DG) for providing ancillary services in electrical distribution systems is addressed. Fuel cell-based, photovoltaic cell-based, and wind Generation systems are connected to the distribution network through power electronic interfaces, each with a proper storage system for the optimal grid operation. Thanks also to the storage system, the DG units are able to provide ancillary services such as load following, back-up, peak shaving, reactive power support and power quality disturbance compensation. A centralized control system coordinates the DG units. Time domain simulations on an actual distribution system are reported and discussed.

  • On the Evaluation of Power Quality Indices in Distribution Systems with Dispersed Generation
    Renewable energy & power quality journal, 2009
    Co-Authors: Daniela Proto, Antonio Bracale, Guido Carpinelli, Annarita Di Fazio
    Abstract:

    The increasing penetration of Dispersed Generation (DG) influences the power quality (PQ) levels in the distribution networks. Then, an accurate assessment of PQ disturbances in presence of DG is needed and adequate probabilistic indices should be adopted to properly quantify the random nature of the disturbances. In this paper, a tool for the calculation of slow voltage variations, waveform distortions, unbalances, voltage fluctuations and voltage sag probabilistic indices has been developed by using DigSilent Power Factory software. Numerical applications are performed on a 120-bus distribution network whose DG units are wind generators and gas turbine units.

Guido Carpinelli - One of the best experts on this subject based on the ideXlab platform.

  • A fuel cell-based Dispersed Generation system providing system ancillary services through power electronic interfaces
    Renewable Energy, 2011
    Co-Authors: R. Angelino, Antonio Bracale, Guido Carpinelli, M. Mangoni, Daniela Proto
    Abstract:

    Recent advances in power electronic technology for interfacing Dispersed energy resources to distribution grids offer potential solutions to several technical and economical problems in distribution networks. In particular, Dispersed Generation (DG) can be used to provide the usual energy service as well as some ancillary services, such as load following, back-up service, and compensation of Power Quality disturbances. In this paper, a fuel cell-based DG system is proposed for providing energy and ancillary services. The novelty of the system is that it can operate with a ‘system strategy’ (aimed at compensating for the disturbances in the whole system or in some privileged areas of the network) thanks to a suitable control technique of the power electronic interfaces. In this way, the benefits of using the Dispersed Generation system are maximized. Computer simulations were performed on an actual distribution grid to demonstrate the effectiveness of the compensation actions.

  • Distribution Networks with Linear and Nonlinear Loads: Cost-Based Method for Planning Dispersed Generation and Capacitor Units under Uncertainty
    Journal of Energy Engineering, 2011
    Co-Authors: Claudia Battistelli, Guido Carpinelli, Daniela Proto, Fabio Mottola, D. Zoppoli
    Abstract:

    This paper discusses the optimal allocation of capacitors and Dispersed Generation units in a medium-voltage distribution system with linear and nonlinear loads. An optimization problem is formulated and solved for optimal siting and sizing, with the objective of minimizing costs sustained by the distributor for reactive power service, even containing the impact of the waveform distortions. A three-step procedure, based on genetic algorithm and decision theory, is applied to obtain a solution for the optimization problem that takes into account the unavoidable uncertainties that the Dispersed Generation production and the loads introduce. The numeric applications performed on an 18-bus test distribution system demonstrate of the effectiveness of the proposed procedure.

  • Dispersed Generation units providing system ancillary services in distribution networks by a centralised control
    IET Renewable Power Generation, 2011
    Co-Authors: Antonio Bracale, R. Angelino, Guido Carpinelli, M. Mangoni, Daniela Proto
    Abstract:

    This study considers a distribution system with a number of Dispersed Generation (DG) units interconnected to the AC grid through power electronic interfaces. Some selected DG units were able to provide energy service and system ancillary services (in particular, voltage regulation and partial compensation or elimination of some power quality disturbances, such as waveform distortions and voltage unbalances) through a proper centralised control system that provides the reference signals to the converters of the DG units in real time. In addition, the problem of time delays owing to data acquisition and digital signal processing for reference signal calculations and the effects of these delays on compensation actions were studied. Several time-domain simulations of an actual distribution system are reported, taking into account different DG units and time-delay scenarios.

  • Dispersed Generation and storage systems for providing ancillary services in distribution systems
    SPEEDAM 2010, 2010
    Co-Authors: R. Angelino, Guido Carpinelli, Daniela Proto, Antonio Bracale
    Abstract:

    In this paper, the problem of the use of Dispersed Generation (DG) for providing ancillary services in electrical distribution systems is addressed. Fuel cell-based, photovoltaic cell-based, and wind Generation systems are connected to the distribution network through power electronic interfaces, each with a proper storage system for the optimal grid operation. Thanks also to the storage system, the DG units are able to provide ancillary services such as load following, back-up, peak shaving, reactive power support and power quality disturbance compensation. A centralized control system coordinates the DG units. Time domain simulations on an actual distribution system are reported and discussed.

  • On the Evaluation of Power Quality Indices in Distribution Systems with Dispersed Generation
    Renewable energy & power quality journal, 2009
    Co-Authors: Daniela Proto, Antonio Bracale, Guido Carpinelli, Annarita Di Fazio
    Abstract:

    The increasing penetration of Dispersed Generation (DG) influences the power quality (PQ) levels in the distribution networks. Then, an accurate assessment of PQ disturbances in presence of DG is needed and adequate probabilistic indices should be adopted to properly quantify the random nature of the disturbances. In this paper, a tool for the calculation of slow voltage variations, waveform distortions, unbalances, voltage fluctuations and voltage sag probabilistic indices has been developed by using DigSilent Power Factory software. Numerical applications are performed on a 120-bus distribution network whose DG units are wind generators and gas turbine units.

Ingo Sgoff - One of the best experts on this subject based on the ideXlab platform.

  • ISGT - Optimized regulation of Dispersed Generation units for minimization of reactive power consumption
    2015 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), 2015
    Co-Authors: P. Franz, I. Talavera, Jutta Hanson, Ingo Sgoff
    Abstract:

    Because of the increasing share of renewable energies violations of the statuary voltage limits occur more and more often in the German distribution grids. Therefore, distribution system operators take advantage of reactive power support by Dispersed Generation units for voltage regulation. Commonly, only one standard cosφ(P)-profile is implemented as a control-method for all units to decrease voltage rises. This profile is independent of network characteristics and the point of common coupling. However, additional reactive power consumption causes additional reactive power unbalances in the networks which have to be compensated by the overlaid transmission grid. This becomes more difficult in times of a decreasing number of large conventional power plants. In order to reduce the additional reactive power demand caused by the improvement of statuary voltage stability this paper describes two methods to calculate optimized cosφ(P)-profiles for reactive power support. Beside the reduction of reactive power demand the optimized control-methods have also the positive effect of lower power losses in the distribution grids.