Back-Up Protection Scheme for Series-Compensated Transmission Line Connected to Wind Farm

Abstract

Series compensation poses serious challenges to the protection schemes of transmission lines (TLs). Moreover, with the penetration of distributed generation (DG), the conventional protection schemes fail to detect the fault and identify the faulty phase as the backfeed currents from the DG units mask the faulty phase. This work presents an algorithm for the protection of series-compensated TLs (SCTL) integrated with wind farms. The algorithm uses the phase difference between the positive sequence currents at the two ends of the TL to discriminate internal and external faults. The faulty phase for internal fault is identified from the difference in complex power at the two ends of the TL. Extensive simulations with several fault and system parameters assess the reliability and applicability of this technique.

KEYWORDS:

• Differential power
• Fault classification
• Internal fault and external fault
• Series-compensated transmission line
• Wind farm

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Monideepa Paul

Monideepa Paul received her MTech degree in industrial electrical systems from the National Institute of Technology, Durgapur, India. She is currently pursuing her PhD at the Department of Electrical Engineering, Jadavpur University, Kolkata, India. Her areas of interest are fault identification and classification in distribution and transmission systems.

Sudipta Nath

Sudipta Nath received her BE, MTech and PhD degrees from NIT Durgapur, Calcutta University, and IIEST Shibpur. She is currently working as a professor in the Electrical Engineering Department of Jadavpur University in Kolkata, India. Her research interests include fault detection and power quality improvement in distribution systems. Email: [email protected]