Abstract

A series of data transmission tests has been carried out on the telecommunications network privately-owned by electric power companies in Japan. These tests have been conducted at data signalling rates of 2,400, 4,800 bit/s, 42 and 48 kbit/s. This paper outlines the test results, including error rate performance, various error characteristics and group delay distortion. This paper also presents design criteria of data transmission circuits for power system control, protective relaying and also supervision of the power system.

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