Kabushiki Kaisha Toshiba

Koichi Hamamatsu

Minoru Saito

Takashi Nakajima

Shiro Maruyama

Masao Takahashi

Yoshito Sameda

Itsuo Shuto

Noriyoshi Suga

Tatsuji Tanaka

Setsuo Tamura

Masayuki Kosakada

Hachidai Ito

Toshiyuki Saida

Yuuji Minami

Hiromi Nagasaki

Hideki Torikoshi

Shigekazu Morita

Tokuo Ito

A time synchronization system comprises a GPS (Global Positioning System) receiver for receiving a time signal from a Global Positioning System (GPS), and outputting a UTC (Universal Time Coordinated) synchronization reference signal synchronizing with UTC and a UTC synchronization absolute time signal, and a time signal distributor for generating a reference time signal synchronizing with UTC from the synchronization reference signal and the absolute time signal, and transmits this reference time signal in distribution to a plurality of distributed control oriented terminal devices. The time synchronization between the plurality of distributed control oriented terminal devices can be thereby taken.

Time synchronizing system

The present invention relates to a system for protecting and controlling main-circuit components of an electricity transmission substation. The system includes devices for digital data output, protection-and-controlling, component controlling-and-monitoring, and communication. The digital data output devices input analogue AC electric values and output digital data. The protection-and-controlling devices input the data from the digital data output devices, and further control, monitor, and protect the substation main-circuit components. The component controlling-and-monitoring devices receive commands from the protection-and-controlling devices or from the substation controlling-and-monitoring equipment, and further control and monitor the substation main-circuit components. The devices for digital data output, the protection-and-controlling, and component controlling-and-monitoring are disposed near or within their corresponding substation main-circuit components.

System for protecting and controlling substation main circuit components

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Hinode-machi, Japan

Koichi Hamamatsu