Results 241 to 250 of about 231,657 (285)

Adaptive Numerical Distance Relaying Scheme

2020
Impedance reach of numerical distance relay is severely affected by fault resistance (RF), fault inception angle (FIA), fault type (FT), fault location (FL), power flow angle (PFA), series compensation in transmission and load encroachment. This chapter presents a novel standalone adaptive distance protection algorithm for detection, classification ...
Ujjaval Patel, Praghnesh Bhatt, Nilesh Chothani   +2 more
openaire   +1 more source

Fundamental basis for distance relaying

Electrical Engineering, 1931
For single-line protection, with the exception of pilot-wire, or superposed high-frequency methods, distance relays form the nearest approach to the theoretically ideal system. Except for errors due to fault resistance, these relays operate accurately according to the relative distance to faults.
W. A. Lewis, L. S. Tippet
openaire   +1 more source

Load model effects on distance relay settings

IEEE Transactions on Power Delivery, 2002
The purpose of this paper is to study load model effects on distance protective relay settings in Taipower's transmission system. Five load models have been used in order to explore the effects of load characteristics on relay settings: (1) static ZIP model, (2) dynamic motor model, (3) composite model, (4) PTI IEEE model, and (5) exponential model ...
K. H. Tseng, W. S. Kao, J. R. Lin
openaire   +1 more source

Operating experience with distance ground relays

Electrical Engineering, 1946
DISTANCE RELAYS for protection against wire-to-wire, two wire-to-ground, and three phase faults on transmission lines have met with wide acceptance. However, the use of distance relays for protection against single wire-to-ground faults has been limited to relatively few installations.
openaire   +1 more source

Control of distance relay potential connections

Electrical Engineering, 1934
By means of the automatic switching of potential connections to distance relays according to type of fault, each distance relay may be made to do the work of 2 or 3 such relays. The cost of distance relay installations may be reduced considerably by this automatic control of potential connections, and consequently their use should become more ...
openaire   +1 more source

Stand alone intelligent digital distance relay

IEEE Transactions on Power Systems, 2000
Remote end infeed causes problems in distance relay especially under high resistance earth fault conditions. Although a distance relay set to an ideal operating region can cover the fault resistance at one particular load condition, the operating region is affected by changes in load condition.
K.K. Li, L.L. Lai, A.K. David
openaire   +1 more source

Testing of high speed distance relays

Electrical Engineering, 1933
This paper describes the various test methods which have been evolved during three years by The Tennessee Electric Power Company, which pioneered the use of reactance type distance relays in this country. Specific examples with diagrams are given. New considerations brought about by the use of high speed distance relays are discussed, including their ...
openaire   +1 more source

Phase distance relaying for transmission systems

2013 IEEE Grenoble Conference, 2013
Distance Relays are widely used to protect transmission lines. However, due to underreaching and overreaching phenomena, there is a low precision in protection zone limits of distance relays. Thus, in this work, an extension of an existing state-of-the-art algorithm based in phase coordinates is proposed to increase the precision in zone protection ...
Denise Pivatto Marzec, Arturo Suman Bretas   +1 more
openaire   +1 more source

New technique for quadrilateral distance relay

Proceedings of the Institution of Electrical Engineers, 1974
A new technique for the development of a quadrilateral distance relay for transmission-line protection is reported. The modus operandi consists in continuously monitoring the coincidence period of four suitably derived relaying quantities, and the relay is made to develop trip output if the coincidence period is zero, whereas if the coincidence period ...
A.T. Johns, Y.G. Paithankar, M.T. Sant, V.T. Ingole   +3 more
openaire   +1 more source

Hybrid Comparison Technique for Distance Relays

IEEE Transactions on Power Apparatus and Systems, 1971
A new hybrid comparison technique for transmission line protection, providing polar characteristics marked by sharp discontinuities, has been developed. The comparator models, described in block schematic form, accompany a steady state theoretical basis for comparison.
Khincha, HP, Arun, CG, Parthasarathy, K, Ashok Kumar, BS   +3 more
openaire   +1 more source