β Scribed by M. Hamed
No coin nor oath required. For personal study only.
Now that large blocks of power need to be transmitted to load centers, modifications to traditional transmission systems may be necessary. Although multi-phase (six-phase) systems have been suggested, new connections between the phases of double-circuit transmission lines might improve the trans.. mission performance.
This paper presents a mathematical analysis of the main parameters of multi-phase transmission lines. The mutual effect between the phase voltages is included. A ring-type transmission system is proposed for power transmission over lines of a network. Different configurations for such ring systems are investigated. The best connection diagram for this type of transmission is determined according to the condition of maximum transmitted power. The voltage distribution in ring transmission systems is compared with that of ordinary double-circuit transmission lines. The currents through both ring and ordinary lines are estimated. The circulating power during the no-load operation of ring transmission systems is evaluated. The transmitted power over both ordinary and ring double-circuit transmission lines is formulated and computed. Also, the transmission efficiency is calculated with respect to the transmission distance. The performance of ring transmission systems varies according to the angle between the voltages of both phases of the two circuits of double-circuit lines. Abnormal conditions are compared for three types of power transmission, namely, single, double and ring transmission lines.
The proposed ring transmission system is recommended for networks with bad stability characteristics.
π SIMILAR VOLUMES
The evaluation of vibratory power transmission in structural junctions is an important part of the study of structure-borne noise. In this paper, a method for calculating the transmission efficiency of three-dimensional beam junctions is described. It takes into account the effects of unsymmetrical