| 摘要 |
<p>There is disclosed an apparatus for detecting a short-circuit of a bi-polar d.c. transmission system in which one end (B) of a neutral line (6) is ground and the other end (A) thereof is not ground. This short-circuit detecting apparatus is adapted to detect a short-circuit between d.c. transmission lines on conditions that a current (I6) flowing through the neutral line (6) is below a predetermined value, that a ground current (Ig) at she ground point (B) of the neutral line (6) is below a predetermined value, and that a difference between bi-polar current command values (Idp1, Idp2) is above a predetermined value. <IMAGE></p> |
