Frequency regulating device for A.C. systems interconnected through D.C. systems

摘要

In a system interconnection composed of two a.c. systems, two converters connected with the respective a.c. systems and a d.c. power transmission system, one of the converters or rectifier is subject to constant current control and the other or inverter is subject to constant margin angle control. In the control system, the difference between the frequencies of the a.c. systems to which the respective converters are connected is utilized for modifying the set point of control. The greater the frequency difference, the rate of modification of the set point is increased so as to minimize the frequency difference between the a.c. systems remaining after control.