| 摘要 |
<p>1,267,429. Connecting A.C. networks. TOKYO SHIBAURA ELECTRIC CO. Ltd., and TOKYO ELECTRIC POWER CO. Inc. 22 Aug., 1969 [28 Aug., 1968 (2)], No. 42007/69. Heading H2H. Two multi-phase power systems are connected by a link which comprises variable reactors connected between all the corresponding and all the different phases of the two systems. In the arrangement shown in Fig. 1, three-phase systems A and B are linked by groups 13, 14, 15 of saturable reactors. The system voltages are sensed by transformers 16, 17, and the currents in the link are detected by current transformers such as 22, 23, 24, others not -being shown. During normal operation, a control device 25 sends current by way of a diode 28 to excite the control windings of reactors 131, 132 and 133 only, permitting current flow between corresponding phases.. If, however, a fault occurs and the systems get out of step, the control device is influenced by the phase difference detector 18 and supplies current through diodes 29, 30 to excite other reactors and permit current flow between different phase lines of the two systems. The current and power flowing through the link are automatically limited to values determined by set circuits 26, 27.</p> |
