Islanding Protection with Active and Reactive Power Control
The Metropolitan power system owned and operated by Tokyo Electric Power Company consists of several radial sub-power systems. Each sub-power system receives electric power from the 500 kV mesh bulk power system, via 275 kV parallel overhead transmission lines and three 275 kV underground cable circuits which take the same route. These sub-power systems cannot be interconnected to one another due to the restrictions imposed by short-circuit fault current. One of these metropolitan power systems supplies many politically and economically important loads and the load capacity of the locally installed power plant is small.
More
