Mitsubishi Denki Kabushiki Kaisha

Chubu Electric Power Company, Inc.

Tadahiro Gouda

Isao Koda

Minoru Hatata

Taizo Hasegawa

Hideharu Oshida

Hirotaka Ono

Toshiharu Narita

The power system stabilizer is provided at an individual power system to be separated due to an accident cutting off a link line which interconnects a number of power systems to form a large-scale power system. The power systems include power stations such as power plants and transformer substations. A simplified arithmetic processing unit of the stabilizer performs an arithmetic processing by a simple linear equation using an output frequency of a representative power station belonging to the separated power system immediately after the accident has been cleared, so that a total load drop of the separated power system can be assumed. Based on the assumption amount, balance control of demand and supply in the separated system is made.

Power system stabilizer

An abnormal signal detecting device, comprising a signal sampling and conversion circuit for sampling a predetermined number of data points along an analog signal and generating digital sampled data signals representative thereof; a memory circuit, connected to the signal sampling and conversion circuit, for storing the digital sampled data; and a consistency detecting circuit, connected to the memory circuit, for comparing at least three consecutive digital sampled data signals and generating an output representing an abnormal condition whenever at least three consecutive digital sampled data signals are the same.

Abnormal signal detecting device

Growing community of inventors

Hyogo, Japan

Tadahiro Gouda