| Abstract |
A continuous harmonic observation system has been developed which can continuously observe harmonics superposed in power distribution lines and be remotely controlled. The system consists of a fixed key station, movable terminal stations and communication lines connecting both kinds of stations and one key station can remotely control maximum five terminal stations so that the harmonics at multiple points can simultaneously be observed. There are two observation modes, one being a periodical observation mode and the other a continuous observation mode, and three types of observations are further prepared in the latter mode. The continuous observation mode is formed so that the maximum value data including the maximum value of a designated harmonic content, which can not be picked up in the conventional single-shot observation method, may reliably be sampled, This point is the most remarkable feature of the present system. The system can be utilized also as a support system for exploring the cause of harmonics generation by analyzing how harmonics in distribution lines are superposed at the spots of the terminal stations and in
the period of observation. |
