WAVELET TRANSFORM BASED FAULT LOCATION ESTIMATOR FOR STATCOM COMPENSATED LINES

Voltage Source Converter (VSC) based Flexible AC Transmission system (FACTS) controllers have several advantages like modular construction, better performance, facility to add an energy source at the DC bus. Static Synchronous Compensator (STATCOM) is a VSC based shunt connected controller employed to have better voltage regulation at critical buses. A STATCOM with energy storage device facilitates operation in any of the four quadrants and hence present methods for fault location estimation may not be accurate and reliable. This paper puts forward a new, simple and dependable wavelet transform based fault location estimator for transmission lines deploying STATCOM integrating energy storage device. It is shown that the recommended estimation methodology is very precise and is least affected by operating mode of STATCOM and fault resistance.