The Experts below are selected from a list of 6 Experts worldwide ranked by ideXlab platform

Bo Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Performance of Shipboard Medium-Voltage DC System of Various Grounding Modes Under Monopole Ground Fault
    IEEE Transactions on Industry Applications, 2015
    Co-Authors: Wang Yunchao, Shuiming Chen, Rong Zeng, Bo Zhang
    Abstract:

    This paper compares different grounding modes of a shipboard medium-voltage dc (MVDC) system such as ungrounded, solidly grounded, grounded with resistors, and grounded with resistors in parallel. Based on a typical shipboard MVDC system under different grounding modes, the transient short-circuit current and overvoltage under a monopole ground fault condition are calculated with PSCAD/EMTDC. The impact of the grounding resistance on the fault feature of the system is also studied. According to the comparative analysis and simulation results, a suitable grounding mode and the grounding resistance are proposed. The influences of load conditions, capacitance of loads, capacitance of the transmission cables, resistance between line and ground at the fault point, and fault position on the overvoltage are considered. Finally, a system protection scheme consisting of grounding mode selection, capacitor, arrester, and Conjugate Mirror Filter has been developed.

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

  • Performance of Shipboard Medium-Voltage DC System of Various Grounding Modes Under Monopole Ground Fault
    IEEE Transactions on Industry Applications, 2015
    Co-Authors: Wang Yunchao, Shuiming Chen, Rong Zeng, Bo Zhang
    Abstract:

    This paper compares different grounding modes of a shipboard medium-voltage dc (MVDC) system such as ungrounded, solidly grounded, grounded with resistors, and grounded with resistors in parallel. Based on a typical shipboard MVDC system under different grounding modes, the transient short-circuit current and overvoltage under a monopole ground fault condition are calculated with PSCAD/EMTDC. The impact of the grounding resistance on the fault feature of the system is also studied. According to the comparative analysis and simulation results, a suitable grounding mode and the grounding resistance are proposed. The influences of load conditions, capacitance of loads, capacitance of the transmission cables, resistance between line and ground at the fault point, and fault position on the overvoltage are considered. Finally, a system protection scheme consisting of grounding mode selection, capacitor, arrester, and Conjugate Mirror Filter has been developed.

Shuiming Chen - One of the best experts on this subject based on the ideXlab platform.

  • Performance of Shipboard Medium-Voltage DC System of Various Grounding Modes Under Monopole Ground Fault
    IEEE Transactions on Industry Applications, 2015
    Co-Authors: Wang Yunchao, Shuiming Chen, Rong Zeng, Bo Zhang
    Abstract:

    This paper compares different grounding modes of a shipboard medium-voltage dc (MVDC) system such as ungrounded, solidly grounded, grounded with resistors, and grounded with resistors in parallel. Based on a typical shipboard MVDC system under different grounding modes, the transient short-circuit current and overvoltage under a monopole ground fault condition are calculated with PSCAD/EMTDC. The impact of the grounding resistance on the fault feature of the system is also studied. According to the comparative analysis and simulation results, a suitable grounding mode and the grounding resistance are proposed. The influences of load conditions, capacitance of loads, capacitance of the transmission cables, resistance between line and ground at the fault point, and fault position on the overvoltage are considered. Finally, a system protection scheme consisting of grounding mode selection, capacitor, arrester, and Conjugate Mirror Filter has been developed.

Rong Zeng - One of the best experts on this subject based on the ideXlab platform.

  • Performance of Shipboard Medium-Voltage DC System of Various Grounding Modes Under Monopole Ground Fault
    IEEE Transactions on Industry Applications, 2015
    Co-Authors: Wang Yunchao, Shuiming Chen, Rong Zeng, Bo Zhang
    Abstract:

    This paper compares different grounding modes of a shipboard medium-voltage dc (MVDC) system such as ungrounded, solidly grounded, grounded with resistors, and grounded with resistors in parallel. Based on a typical shipboard MVDC system under different grounding modes, the transient short-circuit current and overvoltage under a monopole ground fault condition are calculated with PSCAD/EMTDC. The impact of the grounding resistance on the fault feature of the system is also studied. According to the comparative analysis and simulation results, a suitable grounding mode and the grounding resistance are proposed. The influences of load conditions, capacitance of loads, capacitance of the transmission cables, resistance between line and ground at the fault point, and fault position on the overvoltage are considered. Finally, a system protection scheme consisting of grounding mode selection, capacitor, arrester, and Conjugate Mirror Filter has been developed.

A. Hamid Krim - One of the best experts on this subject based on the ideXlab platform.

  • Multiscale shape analysis: beyond the normality and independence of noise
    Wavelet Applications in Signal and Image Processing VII, 1999
    Co-Authors: A. Hamid Krim
    Abstract:

    In this paper, we propose a new algorithm for extracting a non smooth shape from its noisy observation. The key ideal is to project the noisy shape onto a set of orthogonal subspaces at different resolutions, and construct scale space representation gleaned from the locally smoothed shape. Using the curvature we proceed to Filter the high resolution scale subspace by projecting it onto the scale which is in turn used for the reconstruction. Inspired by the Conjugate Mirror Filter and the wavelet decomposition synergy, we propose a curvature based Filter operating at different scales and with minimal knowledge about the noise statistics.