Fault Location Method for STATCOM Connected Transmission Lines Using CCM

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DOI: 10.4236/cs.2016.710266    2,031 Downloads   3,857 Views  

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%.

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Ilango, R. and Raja, T. (2016) Fault Location Method for STATCOM Connected Transmission Lines Using CCM. Circuits and Systems, 7, 3131-3141. doi: 10.4236/cs.2016.710266.
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