The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform

Hak-man Kim - One of the best experts on this subject based on the ideXlab platform.

  • A Flywheel Energy Storage System Based on a Doubly Fed Induction Machine and Battery for Microgrid Control
    Energies, 2015
    Co-Authors: Thai-thanh Nguyen, Hyeong Jun YOO, Hak-man Kim
    Abstract:

    Microgrids are eco-friendly power systems because they use renewable sources such as solar and wind power as the main power source. However, the stochastic nature of wind and solar power is a considerable challenge for the efficient operation of microgrids. Microgrid operations have to satisfy quality requirements in terms of the frequency and voltage. To overcome these problems, Energy Storage systems for short- and long-term Storage are used with microgrids. Recently, the use of short-term Energy Storage systems such as Flywheels has attracted significant interest as a potential solution to this problem. Conventional Flywheel Energy Storage systems exhibit only one control mode during operation: either smoothing wind power control or frequency control. In this paper, we propose a new Flywheel Energy Storage system based on a doubly fed induction machine and a battery for use with microgrids. The new Flywheel Energy Storage system can be used not only to mitigate wind power fluctuations, but also to control the frequency as well as the voltage of the microgrid during islanded operation. The performance of the proposed Flywheel Energy Storage system is investigated through various simulations using MATLAB/Simulink software. In addition, a conventional Flywheel Energy Storage system based on a doubly fed induction machine is simulated and its performance compared with that of the proposed one.

Xiaoqiang Du - One of the best experts on this subject based on the ideXlab platform.

  • Hierarchical Coordinated Control of Flywheel Energy Storage Matrix Systems for Wind Farms
    IEEE-ASME Transactions on Mechatronics, 2018
    Co-Authors: Yongduan Song, Xiaoqiang Du
    Abstract:

    Flywheel Energy Storage technology plays an important role in enhancing the operation reliability and efficiency of wind power generation farms. This work investigates an aggregated connection topology of Flywheel Energy Storage matrix system, which is composed of multiple Flywheel Energy Storage system (FESS) units within a wind farm. Based on this architecture, an effective charge/discharge strategy is introduced in order to ensure cooperative operation among Flywheels, so as to realize smooth power transients, quality regulation, and voltage restoration. For each FESS unit, a structurally simple and computationally inexpensive neural-adaptive proportional integration derivative (PID) control algorithm based on Lyapunov stability theory is developed to control each Flywheel individually in coordinated and stable manner. The merits and benefits of the proposed method are validated and demonstrated by both numerical simulations and experimental results.

  • Study on Droop Control Strategy with Application to Flywheel Energy Storage System
    Applied Mechanics and Materials, 2013
    Co-Authors: You Ran Lv, Lei Wang, Jia Yi Xiang, Feng Yang, Xiaoqiang Du
    Abstract:

    The Flywheel Energy Storage technology is a kind of method that converts electrical Energy into kinetic Energy in store. The Flywheel Energy Storage system (FESS) is usually used for renewable Energy system such as wind turbine generator system (WTGS) to adjust the quality of output power. Droop control is a kind of control technology to regulate the active power and reactive power in micro-grid. In this paper, we introduced a method to combine the droop control with FESS and designed the control topology. The droop control method was applied to control the part of inverter in FESS. By controlling the output frequency and the voltage amplitude of WTGS-FESS system, we can regulate the output of the inverter as a promotion in smoother active power and reactive power.

Thai-thanh Nguyen - One of the best experts on this subject based on the ideXlab platform.

  • A Flywheel Energy Storage System Based on a Doubly Fed Induction Machine and Battery for Microgrid Control
    Energies, 2015
    Co-Authors: Thai-thanh Nguyen, Hyeong Jun YOO, Hak-man Kim
    Abstract:

    Microgrids are eco-friendly power systems because they use renewable sources such as solar and wind power as the main power source. However, the stochastic nature of wind and solar power is a considerable challenge for the efficient operation of microgrids. Microgrid operations have to satisfy quality requirements in terms of the frequency and voltage. To overcome these problems, Energy Storage systems for short- and long-term Storage are used with microgrids. Recently, the use of short-term Energy Storage systems such as Flywheels has attracted significant interest as a potential solution to this problem. Conventional Flywheel Energy Storage systems exhibit only one control mode during operation: either smoothing wind power control or frequency control. In this paper, we propose a new Flywheel Energy Storage system based on a doubly fed induction machine and a battery for use with microgrids. The new Flywheel Energy Storage system can be used not only to mitigate wind power fluctuations, but also to control the frequency as well as the voltage of the microgrid during islanded operation. The performance of the proposed Flywheel Energy Storage system is investigated through various simulations using MATLAB/Simulink software. In addition, a conventional Flywheel Energy Storage system based on a doubly fed induction machine is simulated and its performance compared with that of the proposed one.

Zhiping Qi - One of the best experts on this subject based on the ideXlab platform.

  • Modeling and control of a Flywheel Energy Storage system for uninterruptible power supply
    2009 International Conference on Sustainable Power Generation and Supply, 2009
    Co-Authors: Long Zhou, Zhiping Qi
    Abstract:

    Flywheel Energy Storage has attracted new research attention recently in applications like power quality, regenerative braking and uninterruptible power supply (UPS). As a sustainable Energy Storage method, Flywheel Energy Storage has become a direct substitute for batteries in UPS applications. Inner design of the Flywheel unit is shown to illustrate the economical way to construct the system. A comprehensive model of Flywheel Energy Storage system (FESS) that bridging the gap caused by power outage for critical loads in commercial and industrial areas is presented. The basic circuit consists of bidirectional power converter and Flywheel unit coupled with interior permanent magnet synchronous motor (IPMSM). Maximum torque per ampere (MTPA) and flux weakening are used in the control scheme on IPMSM. Detailed block diagrams of the control scheme are given. The FESS for UPS application is modeled, simulated, and analyzed in MATLAB/SIMULINK environment.

  • Modeling and control of a Flywheel Energy Storage system for uninterruptible power supply
    2009 International Conference on Sustainable Power Generation and Supply, 2009
    Co-Authors: Long Zhou, Zhiping Qi
    Abstract:

    Flywheel Energy Storage has attracted new research attention recently in applications like power quality, regenerative braking and uninterruptible power supply (UPS). As a sustainable Energy Storage method, Flywheel Energy Storage has become a direct substitute for batteries in UPS applications. Inner design of the Flywheel unit is shown to illustrate the economical way to construct the system. A comprehensive model of Flywheel Energy Storage system (FESS) that bridging the gap caused by power outage for critical loads in commercial and industrial areas is presented. The basic circuit consists of bidirectional power converter and Flywheel unit coupled with interior permanent magnet synchronous motor (IPMSM). Maximum torque per ampere (MTPA) and flux weakening are used in the control scheme on IPMSM. Detailed block diagrams of the control scheme are given. The FESS for UPS application is modeled, simulated, and analyzed in MATLAB/SIMULINK environment.

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

  • Neuron Adaptive PID Control Algorithm With Application to Flywheel Energy Storage System Unit
    Power system technology, 2020
    Co-Authors: Wang Le
    Abstract:

    A neural adaptive proportional integral differential(PID) control algorithm applied to Flywheel Energy Storage system is proposed. Based on traditional doubly closed-loop governing system and neural network theory the proposed algorithm implements the control of driving motor of Flywheel to make the motor driving the Flywheel Energy Storage unit to store up or release Energy according to the demand of power grid. Both stability and validity of the proposed control algorithm are proved by Lyapunov theory, and the stability conditions of the proposed control algorithm are given. Simulation results show that using the proposed control algorithm the Energy Storage or release of Flywheel Energy Storage unit can be controlled effectively, and the control parameters of Flywheel Energy Storage unit can be adaptively adjusted according to power grid operation, and both control accuracy and robustness of Flywheel Energy Storage unit can be improved.

  • Coordinated Control of Flywheel Energy Storage Matrix System for Wind Farm
    Power system technology, 2020
    Co-Authors: Wang Le
    Abstract:

    The coordinated operation of wind turbine generator systems(WTGS) with Flywheel Energy Storage system(FESS) can effectively smooth the active output of WTGS and improve the power quality, thus it plays a very important role to stable and efficient operation and secure grid-connection of WTGS. According to the features of wind farm and its demand on Energy Storage, a kind of Flywheel Energy Storage matrix system(FESMS), which is composed of multi Flywheel Energy Storage units with same parameters to jointly undertake the task of Energy Storage, is led in. On this basis, a network topology for FESMS and WTGS is designed, and according to the master-slave control mode a charging/discharging and secure coordination control strategy between wind farm and FESMS is designed. In the designed control mode according to charging/discharging and security control strategy the master controller in upper level allocates the charging/discharging power within FESMS and sends reference input/output orders or switch orders to slave controller in lower level to implement the coordinated operation of FESMS with wind farm. Simulation results validate the effectiveness of the proposed control strategy. With the help of FESMS, wind farm can transmit smoothed active output to power grid.