Báo Cáo Analysis of series impedance matrix models and induced magnetic field of transmission lines above lo

Thảo luận trong 'Điện - Điện Tử' bắt đầu bởi Bích Tuyền Dương, 6/2/12.

  1. Bích Tuyền Dương

    Bài viết:
    2,590
    Được thích:
    0
    Điểm thành tích:
    0
    Xu:
    0Xu
    ABSTRACT
    This paper considers the influence of earth complex resistivity and sag to magnitude of the
    induced magnetic field of transmission lines above lossy ground. We first analyze and compare series
    impedance matrix calculation methods. We secondly propose a simple formula for calculating a height
    of overhead distribution lines in a span. Finally, we present new theoretical analysis of the induced
    magnetic field computation of power lines in a span based on the earth-return impedance formulae
    which proposed by Taku Noda [5]. These analytical formulae are more accuracy about mathematics
    and physics because, in which, the correction of earth resistivity and the line height are taken into
    account. Results are presented by means of graphs that are shown that all values of inductances
    (impedances) and induced magnetic fields always vary with complex resistivity and the height of the
    line in a span.

    Keywords: Transmission lines, induced magnetic field, complex resistivity, line sag.
     
Đang tải...