Abstract
Characteristics of temperature control are quite important to insure the reliable operation of the superconducting power transmission cable in practice.
Three typical control schemes are considered for the cable, i.e. proportional (P), proportional integral (P-I), and proportional integral and differential (P-I-D) type feed back control.
Theoretical and numerical analysis show that the first scheme leaves permanent deviation, the second scheme gives smooth convergence, and the third scheme shows fast response for the foundamental oscillation mode, but there remains high frequency oscillations in this type of control.
Therefore we concluded that the second scheme is most suitable control system for the cable, and may be applicable for back up protection of it.
This paper discusses these three control schemes in detail.
