The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform

Patrik Johansson - One of the best experts on this subject based on the ideXlab platform.

Julien Hannauer - One of the best experts on this subject based on the ideXlab platform.

H. Böhm - One of the best experts on this subject based on the ideXlab platform.

  • PERFORMANCE DATA FROM AN IMPROVED SODIUM/NICKEL CHLORIDE CELL
    SAE transactions, 1991
    Co-Authors: J.l. Sudworth, H. Böhm
    Abstract:

    Sodium nickel chloride batteries have been tested in electric cars over the past three years. Although the performance of the cars was satisfactory, reliability was inadequate and it became apparent that the cells needed to tolerate repeated Discharges to 100% Depth of Discharge. A new cell design with an improved sodium electrode was developed and tests with 26 Volt modules of these cells have shown that it will tolerate hundreds of cycles to 100% Depth of Discharge. The capacity and resistance stability of the new cell design are described and the feasibility of rapid charging is discussed. (A) For the covering abstract see IRRD 860570.

  • performance data from an improved sodium nickel chloride cell
    SAE transactions, 1991
    Co-Authors: J.l. Sudworth, H. Böhm
    Abstract:

    Sodium nickel chloride batteries have been tested in electric cars over the past three years. Although the performance of the cars was satisfactory, reliability was inadequate and it became apparent that the cells needed to tolerate repeated Discharges to 100% Depth of Discharge. A new cell design with an improved sodium electrode was developed and tests with 26 Volt modules of these cells have shown that it will tolerate hundreds of cycles to 100% Depth of Discharge. The capacity and resistance stability of the new cell design are described and the feasibility of rapid charging is discussed. (A) For the covering abstract see IRRD 860570.

  • PERFORMANCE DATA FROM AN IMPROVED SODIUM/NICKEL CHLORIDE CELL. IN: ELECTRIC VEHICLE R & D
    Publication of: Society of Automotive Engineers, 1991
    Co-Authors: J.l. Sudworth, H. Böhm
    Abstract:

    Sodium nickel chloride batteries have been tested in electric cars over the past three years. Although the performance of the cars was satisfactory, reliability was inadequate and it became apparent that the cells needed to tolerate repeated Discharges to 100 percent Depth of Discharge. A new cell design with an improved sodium electrode was developed and tests with 26 Volt modules of these cells have shown that it will tolerate hundreds of cycles to 100 percent Depth of Discharge. The capacity and resistance stability of the new cell design are described and the feasibility of rapid charging is discussed.

Wenzhong Gao - One of the best experts on this subject based on the ideXlab platform.

  • a comprehensive battery energy storage optimal sizing model for microgrid applications
    IEEE Transactions on Power Systems, 2018
    Co-Authors: Ibrahim Alsaidan, Amin Khodaei, Wenzhong Gao
    Abstract:

    Microgrids expansion problems with battery energy storage (BES) have gained great attention in recent years. To ensure reliable, resilient, and cost-effective operation of microgrids, the installed BES must be optimally sized. However, critical factors that have a great impact on the accuracy and practicality of the BES sizing results are normally overlooked. These factors include the wide range of characteristics for different technologies, the distributed deployment, the impact of Depth of Discharge and the number of charging/discharging cycles on the BES degradation, and the coordination of microgrid operation modes. Thus, this paper proposes a comprehensive BES sizing model for microgrid applications, which takes these critical factors into account when solving the microgrid expansion problem and accordingly returns the optimal BES size, technology, number, and maximum Depth of Discharge. The microgrid expansion problem is formulated using mixed integer linear programming. The nonlinear relationship between the BES Depth of Discharge and lifecycle is linearized using piecewise linearization technique and implemented to model the BES degradation. The proposed model is validated using a test microgrid. The conducted numerical simulation shows that the proposed model is able to determine the optimal BES size, technology, number, and maximum Depth of Discharge and further enhances the accuracy and practicality of the BES sizing solutions.

  • Optimal design of battery energy storage in stand-alone brownfield microgrids
    2017 North American Power Symposium (NAPS), 2017
    Co-Authors: Ibrahim Alsaidan, Wenzhong Gao, Amin Khodaei
    Abstract:

    Battery energy storage (BES) is an indispensable resource in stand-alone microgrids. A reliable and cost effective microgrid operation can be achieved when the BES is optimally designed and deployed. The BES lifetime, however, is greatly impacted by its operation where two important operation factors must be considered to prolong its lifetime, namely the Depth of Discharge and the number of cycles. This paper proposes a stand-alone brownfield microgrid expansion model that determines the optimal size of installed BES while taking into consideration the impact of the operation factors on the BES lifetime. Based on the relationship between the BES Depth of Discharge and lifecycle, the proposed model can determine the Depth of Discharge impact on the installed BES lifetime. Mixed-integer linear programming (MIP) is used to formulate the problem and a test microgrid is used to validate the effectiveness of the proposed model.

  • Determination of optimal size and Depth of Discharge for battery energy storage in standalone microgrids
    2016 North American Power Symposium (NAPS), 2016
    Co-Authors: Ibrahim Alsaidan, Amin Khodaei, Wenzhong Gao
    Abstract:

    Battery energy storage (BES) has a critical role in standalone microgrids to improve reliability and reduce operation costs. Two major factors affecting the economic viability of integrating a BES to a microgrid are its investment cost and lifetime. The BES investment cost greatly depends on its size, while the BES lifetime, which can be defined as the total number of charge/Discharge cycles that it can perform, depends on how deep the battery is Discharged each time. Therefore, it is imperative to determine both the BES optimal size and Depth of Discharge when integrating BES to a microgrid. This paper presents a standalone microgrid expansion model with the ability of determining the optimal BES that minimize the microgrid expansion cost. The BES long-term investment and short-term operation models, as well as complicated constraints relating the charge/Discharge schedules to the BES lifetime, are further developed and formulated. A mixed integer programming approach is used to formulate the microgrid expansion problem. Numerical simulations on a test standalone microgrid are performed to validate the proposed models.

  • A new control scheme in a battery energy storage system for wind turbine generators
    2012 IEEE Power and Energy Society General Meeting, 2012
    Co-Authors: H. Babazadeh, Wenzhong Gao, K. Duncan
    Abstract:

    This paper introduces a new control strategy for battery energy storage systems used in wind generation. It is specifically targeted to large wind installations, specifically offshore wind applications. This control strategy maximizes the life of the battery and increases the efficiency of the energy storage system while still balancing the power fluctuations of a large wind turbine system. The Depth of Discharge and remaining battery life are the key parameters considered in this approach. The proposed control scheme is applied to the battery package such that each battery cell is controlled individually. Individual cell Depth of Discharge is controlled and cell life is calculated periodically so that all cells within the package reach the end of life at the same. Total storage capacity and individual battery cell size are calculated based on the characteristics of the wind turbine. To verify the presented method, a case is studied in PSCAD and corresponding results are provided.

Johan Scheers - One of the best experts on this subject based on the ideXlab platform.