Noise resistant current relay for a high speed high frequency protector

Journal Article · Mon Jan 01 04:00:00 EST 1979 · Sov. Power Eng. (Engl. Transl.); (United States)

OSTI ID:5714670

Leviush, A I; Shapoval, A P; Solokha, V Ya; Dovbnya, G N

Flashover of the air gap on the switch contacts leads at power substations to propagation of a traveling electromagnetic wave, which arises in the secondary noise circuits. The noise pulses may have significant levels and may reach the relay input. According to data of the time of attenuation of the transient voltages usually lies in the 4 to 20 microsecond range. In the process of operating a high speed high frequency semiconductor current protector, installed on a 750 kV line it was shown that the current protector relays are subject to false operation during switching operations. The designation of these current relays, their circuits, the causes of operation during noise, experimental studies at two 750 kV substations and measurements to eliminate false operation of the relays are examined.

• OSTI ID: 5714670
• Journal Information: Sov. Power Eng. (Engl. Transl.); (United States), Journal Name: Sov. Power Eng. (Engl. Transl.); (United States) Vol. 8:1; ISSN SVPEA
• Country of Publication: United States
• Language: English

Related Subjects

200301* -- Power Transmission & Distribution-- AC Systems
EHV & UHV-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
EHV AC SYSTEMS
ELECTRICAL EQUIPMENT
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
NOISE
OPERATION
POWER SUBSTATIONS
POWER SYSTEMS
RELAYS
RELIABILITY