26-04-2012, 02:16 PM
EVALUATION OF FAULT ANALYSIS IN TRANSMISSION LINES USING RELAY SETTINGS
(1)EVALUATION OF FAULT ANALYSIS IN TRANSMISSION.pdf (Size: 141.99 KB / Downloads: 237)
INTRODUCTION:
There is a rapid development in the
field of electrical power systems, in which large
amount of interconnection involved for
consuming continuity of supply good voltage
regulation. Generation, Transmission and
Distribution are three main stages in power
system. Among these the performance and
maintenance of transmission play an important
role in the field of power system. Analysis of
fault is very pivotal for the stable operation
power system.
Operating Characteristic of the RAZOA
relay:
The directional measuring unit have
quadrilateral characteristic with independent
settings in resistive and reactive directions.
Which have resistance ® and reactance (X)
Journal of Theoretical and Applied Information Technology
can be set independently.
RAZOA relay
We use oval characteristics for long
transmission lines and circular characteristics
for short, medium transmission lines. If we set
relay in the short transmission lines, the
resistances values are kept more to avoid
reactance effect .If we set relay in the long
transmission lines, the reactance values are kept
more to avoid power swing problems. So, there
is possibility of changing the characteristic in
RAZOA relays.
Operating principle of REL-100 Relay:
The different types of faults in
impendence zones can be analyzed using
protection terminal in REL-100 relay.The relay
includes three forward and one reverse
impedance zone, measuring technique used in
REL-100 is based on signal processors which
operate with numerical signal derived from the
analogue to digital converter (A/D)