The Experts below are selected from a list of 3198 Experts worldwide ranked by ideXlab platform

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

  • Three-Phase Fault direction identification method for outgoing transmission line of DFIG-based wind farms
    Journal of Modern Power Systems and Clean Energy, 2019
    Co-Authors: Zhanfeng Fan, Jisi Tang, Guobing Song, Xiaoning Kang, Xiaobo Wang
    Abstract:

    Doubly-fed induction generator (DFIG)-based wind farm has the characteristic of transient Fault with low voltage ride through (LVRT) capability. A new Three-Phase Fault direction identification method for the outgoing transmission line of the wind farm is presented. The ability of the new directional relay to differentiate between a Three-Phase Fault in one direction or the other is obtained by using the increment of phase angle difference between the memory voltage signal and the Fault current signal within a certain time, and using the amplitude variation of the Fault current. It can be inferred that the Fault current is supplied by the wind farm whether the phase angle differs or the current amplitude varies considerably. Different Fault locations at the outgoing transmission line have been simulated by PSCAD/EMTDC to evaluate the reliability and sensitivity of the proposed technique. Results show that the new directional relay is of faster response when a Three-Phase Fault occurs at the outgoing transmission line of a DFIG-based wind farm.

Zhanfeng Fan - One of the best experts on this subject based on the ideXlab platform.

  • Three-Phase Fault direction identification method for outgoing transmission line of DFIG-based wind farms
    Journal of Modern Power Systems and Clean Energy, 2019
    Co-Authors: Zhanfeng Fan, Jisi Tang, Guobing Song, Xiaoning Kang, Xiaobo Wang
    Abstract:

    Doubly-fed induction generator (DFIG)-based wind farm has the characteristic of transient Fault with low voltage ride through (LVRT) capability. A new Three-Phase Fault direction identification method for the outgoing transmission line of the wind farm is presented. The ability of the new directional relay to differentiate between a Three-Phase Fault in one direction or the other is obtained by using the increment of phase angle difference between the memory voltage signal and the Fault current signal within a certain time, and using the amplitude variation of the Fault current. It can be inferred that the Fault current is supplied by the wind farm whether the phase angle differs or the current amplitude varies considerably. Different Fault locations at the outgoing transmission line have been simulated by PSCAD/EMTDC to evaluate the reliability and sensitivity of the proposed technique. Results show that the new directional relay is of faster response when a Three-Phase Fault occurs at the outgoing transmission line of a DFIG-based wind farm.

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

  • Transient current analysis of induction generators for wind power generating system
    Electrical Engineering in Japan, 2004
    Co-Authors: T. Senjyu, N. Sueyoshi, K. Uezato, H. Fujita
    Abstract:

    In this paper we present a transient current analysis of induction generators used in a wind power system before and after Three-Phase Fault conditions. First, the basic equations of an induction generator connected to an infinite bus are developed and then transient current analysis formulas are derived for a Three-Phase Fault before and after Fault clearance. We also determine the initial phase angle for the Three-Phase Fault or the restoration phase angle of the power supply voltages and the time at which the maximum or minimum transient currents flow in the system. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 148(1): 38–45, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.10319

  • Transient current analysis of induction generator for wind power generating system
    IEEE PES Transmission and Distribution Conference and Exhibition, 2002
    Co-Authors: T. Senjyu, N. Sueyoshi, K. Uezato, H. Fujita
    Abstract:

    In this paper, we present transient current analysis of induction generators used in wind power system before and after Three-Phase Fault conditions. At first basic equations of induction generator, connected to infinite bus, are developed and then transient current analysis formulas are deduced for a Three-Phase Fault before and after Fault clearance. Furthermore, it is derived that the initial phase angle for the Three-Phase Fault or restore phase angle of power supply voltages and the time at which maximum or minimum transient currents flow in the system.

R. Sathyanarayanan - One of the best experts on this subject based on the ideXlab platform.

  • DVR with sweep mode control to alleviate voltage sags on a distribution system for three phase Fault
    2012 International Conference on Emerging Trends in Electrical Engineering and Energy Management (ICETEEEM), 2012
    Co-Authors: P. Poornima, N. Veerappan, R. Sathyanarayanan
    Abstract:

    Power quality problems are associated with an extensive number of electromagnetic phenomena in power systems with broad ranges of time frames such as long duration variations, short duration variations and other disturbances. Short duration variations are mainly caused by either Fault conditions or energization of large loads that require high starting currents. Depending on the electrical distance related to impedance type of grounding and connection of transformers between the Faulted/load location and the node, there can be a temporary loss of voltage or temporary voltage reduction (sag) or voltage rise (swell) at different nodes of the system.

  • DVR with sweep mode control to alleviate voltage sags on a distribution system for three phase Fault
    2012 International Conference on Emerging Trends in Electrical Engineering and Energy Management (ICETEEEM), 2012
    Co-Authors: P. Poornima, N. Veerappan, R. Sathyanarayanan
    Abstract:

    The point of common coupling voltage during sag condition resulting due to a Fault occurring on the parallel feeder in a distribution system evidently shows good dynamic response of the DVR achieved through the sweep mode control. It can also be observed that usage of sweep mode control to DVR eliminates the additional sag detection and makes the DVR multifunctional, such as the same control can be used to compensate any variation in the supply voltage.

Mojtaba Khederzadeh - One of the best experts on this subject based on the ideXlab platform.

  • Three-Phase Fault Detection During Power Swing by Transient Monitor
    IEEE Transactions on Power Systems, 2015
    Co-Authors: Jalal Khodaparast, Mojtaba Khederzadeh
    Abstract:

    Distance relays are immune to inadvertent operation during power swings by a block known as “power swing blocking (PSB)”. Its main function is discriminating Faults from power swings. However, if a Fault occurs during a power swing, PSB should be de-blocked and let the distance relay to operate normally and clear the Fault accordingly. Meanwhile, discrimination of a Three-Phase Fault from a power swing is the most difficult task due to their likelihood. This paper proposes a new method to overcome this issue by monitoring the transient period established in the process of current dynamic phasor estimation. In this regard, transient monitor (TM) index, which is the difference between the estimated current samples regenerated from the calculated dynamic phasors and the actual sample values, is used to distinguish the Fault from the power swing. Fourier-Taylor transformation is applied to estimate the dynamic phasor of the current signal. Simulation results verify the inherent potential of the proposed method to overcome the issue.