Performance of high-speed distance relays with particular reference to travelling-wave effects
Traveling waves on e.h.v. transmission lines often cause considerable distortion of relaying measurands, and modern methods of digital simulation are used to examine the performance of crosspolarized Mho relays under more realistic conditions than have hitherto been possible using conventional conjunctive test methods. It is shown that travelling-wave effects can cause a significant delay in the fault-detection process and that, in this respect, the bandwidth of the voltage transformers (v.t.s.) is an important influencing factor. The extensively used block-average comparator arrangement is examined in detail, and it is shown that a recently developed processing technique can provide faster fault-clearance times when coupled with a small degree of overreach. The performance of the block-average comparator mho relay in a long-line application is considered.
- Research Organization:
- Univ. of Bath, Eng.
- OSTI ID:
- 7255705
- Journal Information:
- Proc. Inst. Electr. Eng. (London); (United States), Journal Name: Proc. Inst. Electr. Eng. (London); (United States) Vol. 124:7; ISSN PIEEA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EHV & UHV-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
COMPUTER CALCULATIONS
COMPUTERS
DIGITAL COMPUTERS
EHV AC SYSTEMS
ELECTRICAL EQUIPMENT
ELECTRICAL FAULTS
EQUIPMENT
PERFORMANCE
POWER SYSTEMS
POWER TRANSMISSION LINES
RELAYS
SIMULATION
STABILITY
TRAVELLING WAVES