The Experts below are selected from a list of 1217502 Experts worldwide ranked by ideXlab platform
Venkataramana Ajjarapu - One of the best experts on this subject based on the ideXlab platform.
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investigation of relevant Distribution System representation with dg for voltage stability margin assessment
IEEE Transactions on Power Systems, 2020Co-Authors: Alok Kumar Bharati, Venkataramana AjjarapuAbstract:This paper emphasizes the importance of including unbalanced Distribution Systems for voltage stability studies in power Systems. The paper aims to: discuss the various simulation methods for power System analysis; highlight the need for modeling unbalanced Distribution System for accurate load margin assessment; demonstrate the influence of net-load unbalance (NLU) on voltage stability margin (VSM). We also share a TD these are not guaranteed to proliferate in a balanced manner and uncertainty resulting due to these DERs is well acknowledged. These uncertainties cannot be captured or visualized without representing the Distribution System in detail along with the transmission System. We show the impact of proliferation of DERs in various 3-phase proportions on voltage stability margin through T&D co-simulation. We also study the impact of volt/VAR control on voltage stability margin. This analysis is only possible by representing the Distribution System in detail through T&D co-simulation. Higher percentage of net-load unbalance (NLU) in Distribution System aggravates the voltage stability margin of the Distribution System, which can further negatively influence the overall voltage stability margin of the System.
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investigation of relevant Distribution System representation with dg for voltage stability margin assessment
arXiv: Systems and Control, 2019Co-Authors: Alok Kumar Bharati, Venkataramana AjjarapuAbstract:This paper emphasizes the importance of including the unbalance in the Distribution networks for stability studies in power Systems. The paper aims to: discuss the various simulation methods for power System analysis; highlight the need for modeling unbalanced Distribution System for accurate load margin assessment; demonstrate the influence of net-load unbalance (NLU) on voltage stability margin (VSM). We also share a TD these are not guaranteed to proliferate in a balanced manner and uncertainty resulting due to these DERs is well acknowledged. These uncertainties cannot be captured or visualized without representing the Distribution System in detail along with the transmission System. We show the impact of proliferation of DERs in various 3-phase proportions on voltage stability margin through T&D co-simulation. We also study the impact of volt/VAR control on voltage stability margin. This analysis is only possible by representing the Distribution System in detail through T&D co-simulation. Higher percentage of net-load unbalance (NLU) in Distribution System aggravates the stability margin of the Distribution System which can further negatively impact the overall stability margin of the System.
Alok Kumar Bharati - One of the best experts on this subject based on the ideXlab platform.
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investigation of relevant Distribution System representation with dg for voltage stability margin assessment
IEEE Transactions on Power Systems, 2020Co-Authors: Alok Kumar Bharati, Venkataramana AjjarapuAbstract:This paper emphasizes the importance of including unbalanced Distribution Systems for voltage stability studies in power Systems. The paper aims to: discuss the various simulation methods for power System analysis; highlight the need for modeling unbalanced Distribution System for accurate load margin assessment; demonstrate the influence of net-load unbalance (NLU) on voltage stability margin (VSM). We also share a TD these are not guaranteed to proliferate in a balanced manner and uncertainty resulting due to these DERs is well acknowledged. These uncertainties cannot be captured or visualized without representing the Distribution System in detail along with the transmission System. We show the impact of proliferation of DERs in various 3-phase proportions on voltage stability margin through T&D co-simulation. We also study the impact of volt/VAR control on voltage stability margin. This analysis is only possible by representing the Distribution System in detail through T&D co-simulation. Higher percentage of net-load unbalance (NLU) in Distribution System aggravates the voltage stability margin of the Distribution System, which can further negatively influence the overall voltage stability margin of the System.
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investigation of relevant Distribution System representation with dg for voltage stability margin assessment
arXiv: Systems and Control, 2019Co-Authors: Alok Kumar Bharati, Venkataramana AjjarapuAbstract:This paper emphasizes the importance of including the unbalance in the Distribution networks for stability studies in power Systems. The paper aims to: discuss the various simulation methods for power System analysis; highlight the need for modeling unbalanced Distribution System for accurate load margin assessment; demonstrate the influence of net-load unbalance (NLU) on voltage stability margin (VSM). We also share a TD these are not guaranteed to proliferate in a balanced manner and uncertainty resulting due to these DERs is well acknowledged. These uncertainties cannot be captured or visualized without representing the Distribution System in detail along with the transmission System. We show the impact of proliferation of DERs in various 3-phase proportions on voltage stability margin through T&D co-simulation. We also study the impact of volt/VAR control on voltage stability margin. This analysis is only possible by representing the Distribution System in detail through T&D co-simulation. Higher percentage of net-load unbalance (NLU) in Distribution System aggravates the stability margin of the Distribution System which can further negatively impact the overall stability margin of the System.
Kevin P Schneider - One of the best experts on this subject based on the ideXlab platform.
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Distribution System restoration with microgrids using spanning tree search
IEEE Transactions on Power Systems, 2014Co-Authors: Chenching Liu, Kevin P SchneiderAbstract:Distribution System restoration (DSR) is aimed at restoring loads after a fault by altering the topological structure of the Distribution network while meeting electrical and operational constraints. The emerging microgrids embedded in Distribution Systems enhance the self-healing capability and allow Distribution Systems to recover faster in the event of an outage. This paper presents a graph-theoretic DSR strategy incorporating microgrids that maximizes the restored load and minimizes the number of switching operations. Spanning tree search algorithms are applied to find the candidate restoration strategies by modeling microgrids as virtual feeders and representing the Distribution System as a spanning tree. Unbalanced three-phase power flow is performed to ensure that the proposed System topology satisfies all operational constraints. Simulation results based on a modified IEEE 37-node System and a 1069-node Distribution System demonstrate the effectiveness of the proposed approach.
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multi state load models for Distribution System analysis
IEEE Transactions on Power Systems, 2011Co-Authors: Kevin P Schneider, Jason C Fuller, David P ChassinAbstract:Recent work in the field of Distribution System analysis has shown that the traditional method of peak load analysis is not adequate for the evaluation of emerging Distribution System technologies. Voltage optimization, demand response, electric vehicle charging, and energy storage are examples of technologies with characteristics having daily, seasonal, and/or annual variations. In addition to the seasonal variations, emerging technologies such as demand response and plug-in electric vehicle charging have the potential to receive control signals that affects their energy consumption. To support time-series analysis over different time frames and to incorporate potential control signal inputs, detailed end-use load models that accurately represent loads under various conditions, and not just during the peak load period, are necessary. This paper will build on previous end-use load modeling work and outline the methods of general multi-state load models for Distribution System analysis.
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Distribution System analysis to support the smart grid
Power and Energy Society General Meeting, 2010Co-Authors: Roger C Dugan, Thomas E. Mcdermott, Robert F. Arritt, Sukumar Brahma, Kevin P SchneiderAbstract:The “Smart Grid” refers to various efforts to modernize the power grid through the application of intelligent devices. This paper describes current thinking by members of the Distribution System Analysis Subcommittee (DSA SC) on how Distribution System analysis might evolve to support the Smart Grid. Various issues related to Smart Grid and Distribution System analysis are identified. The essential characteristics of Distribution System analysis tools to support these issues are discussed. Relevant activities of the DSA SC are described.
Maryam Ramezani - One of the best experts on this subject based on the ideXlab platform.
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dg integrated multistage Distribution System expansion planning
International Journal of Electrical Power & Energy Systems, 2011Co-Authors: Hamid Falaghi, Chanan Singh, Mahmoudreza Haghifam, Maryam RamezaniAbstract:In this paper, a framework is presented to solve the problem of multistage Distribution System expansion planning in which installation and/or reinforcement of substations, feeders and distributed generation units are taken into consideration as possible solutions for System capacity expansion. The proposed formulation considers investment, operation, and outage costs of the System. The expansion methodology is based on pseudo-dynamic procedure. A combined genetic algorithm (GA) and optimal power flow (OPF) is developed as an optimization tool to solve the problem. The performance of the proposed approach is assessed and illustrated by numerical studies on a typical Distribution System.
José M. Arroyo - One of the best experts on this subject based on the ideXlab platform.
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Distribution System Expansion Planning Considering Non-Utility-Owned DG and an Independent Distribution System Operator
IEEE Transactions on Power Systems, 2019Co-Authors: Gregorio Muñoz-delgado, Javier Contreras, José M. ArroyoAbstract:This paper addresses the multistage or dynamic investment decision-making problem arising in a Distribution System within a transactive energy environment. Under such a framework, three agents are involved, namely the Distribution company (DISCO), the owner of distributed generation (DG) units (DGENCO), and the independent Distribution System operator (IDSO). Here, we propose characterizing this planning problem as an instance of trilevel programming. In the upper level, the DISCO identifies the optimal investment plan in network assets and the best potential locations for DG in order to supply the customer demand at maximum profit. In the middle level, the DGENCO determines the best location, sizing, and timing for DG installation so that the corresponding profit is maximized. Finally, in the lower level, the IDSO is responsible for the optimal operation of the expanded Distribution System. The resulting mixed-integer trilevel program is solved by a novel approach relying on Benders decomposition. The performance of the proposed approach has been illustrated with a case study based on a 37-node test System.
