The Experts below are selected from a list of 82491 Experts worldwide ranked by ideXlab platform

Jan Carmeliet - One of the best experts on this subject based on the ideXlab platform.

  • decarbonizing the Electricity Grid the impact on urban energy systems distribution Grids and district heating potential
    Applied Energy, 2017
    Co-Authors: Boran Morvaj, Ralph Evins, Jan Carmeliet
    Abstract:

    Many energy policies set a goal of decreasing the carbon emissions of the energy sector by up to 100%, including the Electricity Grid. This is a long term and gradual process. Energy systems in cities will likely be the starting point for greenhouse gas emissions mitigation since they account for 80% of global carbon emissions. This paper analyses the impact on urban districts of decarbonizing the electric Grid supply. A multi-objective optimization model has been developed that combines the optimal design and operation of distributed energy systems, the design of district heating (DH), Electricity Grid constraints based on linearized alternating current (AC) power flow and Grid upgrade options. A number of scenarios were defined corresponding to different levels of renewable energy share in the Electricity Grid. For each scenario, we analyse the changes to the design and operation of the urban energy system, the impact on the district heating potential, and the impact on the operation of the distribution Grid as well as the Grid upgrade potential.

  • decarbonizing the Electricity Grid the impact on urban energy systems distribution Grids and district heating potential
    Applied Energy, 2017
    Co-Authors: Boran Morvaj, Ralph Evins, Jan Carmeliet
    Abstract:

    Abstract Many energy policies set a goal of decreasing the carbon emissions of the energy sector by up to 100%, including the Electricity Grid. This is a long term and gradual process. Energy systems in cities will likely be the starting point for greenhouse gas emissions mitigation since they account for 80% of global carbon emissions. This paper analyses the impact on urban districts of decarbonizing the electric Grid supply. A multi-objective optimization model has been developed that combines the optimal design and operation of distributed energy systems, the design of district heating (DH), Electricity Grid constraints based on linearized alternating current (AC) power flow and Grid upgrade options. A number of scenarios were defined corresponding to different levels of renewable energy share in the Electricity Grid. For each scenario, we analyse the changes to the design and operation of the urban energy system, the impact on the district heating potential, and the impact on the operation of the distribution Grid as well as the Grid upgrade potential. The results showed that the renewable share of the Grid has a large impact on the optimal solutions obtained. When the renewable share is below 55%, a lot of photovoltaic (PV) Electricity has to be used to offset the carbon emissions from the Grid. Conversely, when the renewable share is above 70%, the use of PV decreases and heating systems become electrified by producing heat with heat pumps (HP). District heating is used regardless of the renewable share in the Grid, but as carbon emissions limits are tightened the potential of DH decreases. Only when the renewable share in the Electricity Grid is 100% it is possible to have a carbon-neutral district. In the carbon optimal solutions of each scenario there is no need for DH, but the Grid has to be upgraded to enable electrification of the heating system.

Boran Morvaj - One of the best experts on this subject based on the ideXlab platform.

  • decarbonizing the Electricity Grid the impact on urban energy systems distribution Grids and district heating potential
    Applied Energy, 2017
    Co-Authors: Boran Morvaj, Ralph Evins, Jan Carmeliet
    Abstract:

    Many energy policies set a goal of decreasing the carbon emissions of the energy sector by up to 100%, including the Electricity Grid. This is a long term and gradual process. Energy systems in cities will likely be the starting point for greenhouse gas emissions mitigation since they account for 80% of global carbon emissions. This paper analyses the impact on urban districts of decarbonizing the electric Grid supply. A multi-objective optimization model has been developed that combines the optimal design and operation of distributed energy systems, the design of district heating (DH), Electricity Grid constraints based on linearized alternating current (AC) power flow and Grid upgrade options. A number of scenarios were defined corresponding to different levels of renewable energy share in the Electricity Grid. For each scenario, we analyse the changes to the design and operation of the urban energy system, the impact on the district heating potential, and the impact on the operation of the distribution Grid as well as the Grid upgrade potential.

  • decarbonizing the Electricity Grid the impact on urban energy systems distribution Grids and district heating potential
    Applied Energy, 2017
    Co-Authors: Boran Morvaj, Ralph Evins, Jan Carmeliet
    Abstract:

    Abstract Many energy policies set a goal of decreasing the carbon emissions of the energy sector by up to 100%, including the Electricity Grid. This is a long term and gradual process. Energy systems in cities will likely be the starting point for greenhouse gas emissions mitigation since they account for 80% of global carbon emissions. This paper analyses the impact on urban districts of decarbonizing the electric Grid supply. A multi-objective optimization model has been developed that combines the optimal design and operation of distributed energy systems, the design of district heating (DH), Electricity Grid constraints based on linearized alternating current (AC) power flow and Grid upgrade options. A number of scenarios were defined corresponding to different levels of renewable energy share in the Electricity Grid. For each scenario, we analyse the changes to the design and operation of the urban energy system, the impact on the district heating potential, and the impact on the operation of the distribution Grid as well as the Grid upgrade potential. The results showed that the renewable share of the Grid has a large impact on the optimal solutions obtained. When the renewable share is below 55%, a lot of photovoltaic (PV) Electricity has to be used to offset the carbon emissions from the Grid. Conversely, when the renewable share is above 70%, the use of PV decreases and heating systems become electrified by producing heat with heat pumps (HP). District heating is used regardless of the renewable share in the Grid, but as carbon emissions limits are tightened the potential of DH decreases. Only when the renewable share in the Electricity Grid is 100% it is possible to have a carbon-neutral district. In the carbon optimal solutions of each scenario there is no need for DH, but the Grid has to be upgraded to enable electrification of the heating system.

Vassilios G Agelidis - One of the best experts on this subject based on the ideXlab platform.

  • review of dc system technologies for large scale integration of wind energy systems with Electricity Grids
    Energies, 2010
    Co-Authors: Sheng Jie Shao, Vassilios G Agelidis
    Abstract:

    The ever increasing development and availability of power electronic systems is the underpinning technology that enables large scale integration of wind generation plants with the Electricity Grid. As the size and power capacity of the wind turbine continues to increase, so is the need to place these significantly large structures at off-shore locations. DC Grids and associated power transmission technologies provide opportunities for cost reduction and Electricity Grid impact minimization as the bulk power is concentrated at single point of entry. As a result, planning, optimization and impact can be studied and carefully controlled minimizing the risk of the investment as well as power system stability issues. This paper discusses the key technologies associated with DC Grids for offshore wind farm applications.

  • wind solar resource complementarity and its combined correlation with Electricity load demand
    Conference on Industrial Electronics and Applications, 2009
    Co-Authors: Vassilios G Agelidis, Y Shrivastava
    Abstract:

    The paper presents analysis of wind and solar data for the same geographical location. The wind speed data taken at ground level are calibrated to evaluate the resource available for a large wind turbine with a hub height of approximate 80m. The correlation of each resource data against the Electricity load demand for an entire year is then calculated separately and selected results are documented. The combined availability of wind and solar source against the same Electricity demand and the respective correlation are also studied confirming that there is a strong complementarity between the two resources although such level of complementarity depends profoundly upon the location. It is shown that a combined resource can effectively deliver energy to the Electricity Grid when load demand experiences peaks, hence strengthening the case for further integration of wind and solar sources with the Electricity Grid. The study used actual weather data reported for the Sydney Airport and Electricity load for New South Wales, Australia.

Ralph Evins - One of the best experts on this subject based on the ideXlab platform.

  • decarbonizing the Electricity Grid the impact on urban energy systems distribution Grids and district heating potential
    Applied Energy, 2017
    Co-Authors: Boran Morvaj, Ralph Evins, Jan Carmeliet
    Abstract:

    Many energy policies set a goal of decreasing the carbon emissions of the energy sector by up to 100%, including the Electricity Grid. This is a long term and gradual process. Energy systems in cities will likely be the starting point for greenhouse gas emissions mitigation since they account for 80% of global carbon emissions. This paper analyses the impact on urban districts of decarbonizing the electric Grid supply. A multi-objective optimization model has been developed that combines the optimal design and operation of distributed energy systems, the design of district heating (DH), Electricity Grid constraints based on linearized alternating current (AC) power flow and Grid upgrade options. A number of scenarios were defined corresponding to different levels of renewable energy share in the Electricity Grid. For each scenario, we analyse the changes to the design and operation of the urban energy system, the impact on the district heating potential, and the impact on the operation of the distribution Grid as well as the Grid upgrade potential.

  • decarbonizing the Electricity Grid the impact on urban energy systems distribution Grids and district heating potential
    Applied Energy, 2017
    Co-Authors: Boran Morvaj, Ralph Evins, Jan Carmeliet
    Abstract:

    Abstract Many energy policies set a goal of decreasing the carbon emissions of the energy sector by up to 100%, including the Electricity Grid. This is a long term and gradual process. Energy systems in cities will likely be the starting point for greenhouse gas emissions mitigation since they account for 80% of global carbon emissions. This paper analyses the impact on urban districts of decarbonizing the electric Grid supply. A multi-objective optimization model has been developed that combines the optimal design and operation of distributed energy systems, the design of district heating (DH), Electricity Grid constraints based on linearized alternating current (AC) power flow and Grid upgrade options. A number of scenarios were defined corresponding to different levels of renewable energy share in the Electricity Grid. For each scenario, we analyse the changes to the design and operation of the urban energy system, the impact on the district heating potential, and the impact on the operation of the distribution Grid as well as the Grid upgrade potential. The results showed that the renewable share of the Grid has a large impact on the optimal solutions obtained. When the renewable share is below 55%, a lot of photovoltaic (PV) Electricity has to be used to offset the carbon emissions from the Grid. Conversely, when the renewable share is above 70%, the use of PV decreases and heating systems become electrified by producing heat with heat pumps (HP). District heating is used regardless of the renewable share in the Grid, but as carbon emissions limits are tightened the potential of DH decreases. Only when the renewable share in the Electricity Grid is 100% it is possible to have a carbon-neutral district. In the carbon optimal solutions of each scenario there is no need for DH, but the Grid has to be upgraded to enable electrification of the heating system.

Zhao Yang Dong - One of the best experts on this subject based on the ideXlab platform.

  • planning of solar photovoltaics battery energy storage system and gas micro turbine for coupled micro energy Grids
    Applied Energy, 2017
    Co-Authors: Junhua Zhao, Hongming Yang, Dongxiao Wang, Zhao Yang Dong
    Abstract:

    Abstract This paper presents the planning of solar photovoltaics (PV), battery energy storage system (BESS) and gas-fired micro turbine (MT) in a coupled micro gas and Electricity Grid. The proposed model is formulated as a two-stage stochastic optimization problem, including the optimal investment in the first stage and the optimal operation in the second stage. To better understand the mutual interactions between electric and heat energy, the gas network models are taken into account. As a result, the fuel availability and price of the gas-fired MT can be explicitly modeled and analyzed. Moreover, to enhance the computational efficiency of the formulated mixed-integer quadratic programming problem, the point estimation method is used as the scenario reduction technique. The effectiveness of the proposed model is verified on a 14-bus coupled micro energy Grid. Based on the case studies, the proposed two-stage planning model can identify a planning solution with the objective value of $99.3104, which is comprised of the daily capital recovery cost of $20.5070, the daily operating cost of $78.8034 for the coupled micro gas and Electricity Grid. Comparative studies demonstrate that the proposed approach can help the microGrid operator identify feasible and optimal planning solutions, and provide valuable guidance for energy infrastructure expansion from an integrated perspective.

  • the 2015 ukraine blackout implications for false data injection attacks
    IEEE Transactions on Power Systems, 2017
    Co-Authors: Gaoqi Liang, Junhua Zhao, Steven R Weller, Fengji Luo, Zhao Yang Dong
    Abstract:

    In a false data injection attack (FDIA), an adversary stealthily compromises measurements from Electricity Grid sensors in a coordinated fashion, with a view to evading detection by the power system bad data detection module. A successful FDIA can cause the system operator to perform control actions that compromise either the physical or economic operation of the power system. In this letter, we consider some implications for FDIAs arising from the late 2015 Ukraine Blackout event.