Patent ID: 7043381

Claim:
A substation system comprising: a protection state detector for detecting a state of monitored objects connected to a power system and for protecting the state of said monitored objects; a monitor state detector for detecting the state of said monitored objects connected to said power system and for monitoring the state of said monitored objects; a controller for controlling controlled objects connected to said power system according to control information; a monitor-information creating device for exchanging information with said monitor state detector using digital signals as media and also creating information about the state of said monitored objects; a control-information creating device for creating control information for controlling said controller, converting the created control information along with received control information into digital signals and transmitting the signals to said controller; and said monitor-information creating device and said control-information creating device connected to a monitoring and controlling device for collecting information about the state of said monitored objects and outputting control information for controlling said controlled objects via a signal transmission path shared by those devices, and exchange information with said monitoring and controlling device using digital signals as media; wherein said monitor-information creating device is connected to said protection state detector and said controller via a protection signal transmission path; and said control-information creating device is connected to said monitor state detector via a monitor signal transmission path.