A new blocking principle with phase and earth fault detection during fast power swings for distance protection

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · IEEE Transactions on Power Delivery

DOI:https://doi.org/10.1109/61.400902· OSTI ID:136555

Mechraoui, A; Thomas, D W.P. ^[1]

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1. Univ. of Nottingham (United Kingdom). Dept. of Electrical and Electronic Engineering

Any sudden change in the configuration or the loading of an electrical network causes power swings between the load concentrations of that network. In order to prevent the distance protection from tripping during such conditions, a power swing blocking device is often utilized. Conventional power swing blocking devices cannot cope with very fast power swings of up to 5 Hz/sec. This paper presents a new power swing blocking principle that has the ability to immediately clear the block when a fault occurs within the relay trip zone. This is demonstrated for extremely fast swings (greater than 5 Hz/sec) and even for two phase operation (during single pole tripping). This new principle is in a form which can be implemented on an existing digital distance protection relay. Results are presented based on extensive simulation studies carried out on a typical 400 kV system, using the Electromagnetic Transient program (EMTP) software.

• OSTI ID: 136555
• Report Number(s): CONF-950103--
• Journal Information: IEEE Transactions on Power Delivery, Journal Name: IEEE Transactions on Power Delivery Journal Issue: 3 Vol. 10; ISSN 0885-8977; ISSN ITPDE5
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
ELECTRICAL FAULTS
ELECTRICAL TRANSIENTS
EQUIPMENT PROTECTION DEVICES
POWER SYSTEMS
STABILIZATION