TITLE:
Fault Location Method for STATCOM Connected Transmission Lines Using CCM
AUTHORS:
R. Ilango, T. Sree Renga Raja
KEYWORDS:
Distance Relay, Fault Location, Flexible AC Transmission Systems (FACTS), Power System Protection, Static Synchronous Compensator (STATCOM)
JOURNAL NAME:
Circuits and Systems,
Vol.7 No.10,
August
22,
2016
ABSTRACT: Determining the fault
location using conventional impedance based distance relay in the presence of
FACTS controllers is a challenging task in a transmission line. A new distance
protection method is developed to
locate the fault in a transmission line compensated with STATCOM with simple calculations. The proposed protection
method considers the STATCOM injected/absorbed current to correct the fault
loop apparent impedance and accordingly calculates the actual distance to the
fault location. The comprehensive equations needed for apparent impedance
calculation are also outlined and
the performance is evaluated and tested with a typical 400 KV transmission
system for different fault types and locations using MATLAB/SIMULINK software.
The evaluation results indicate
that the new protection method effectively estimates the exact fault location
by mitigating the impact of STATCOM on distance relay performance with error
less than 0.3%.