Open Access Journal

ISSN : 2394-2320 (Online)

International Journal of Engineering Research in Computer Science and Engineering (IJERCSE)

Monthly Journal for Computer Science and Engineering

Open Access Journal

International Journal of Engineering Research in Electrical and Electronic Engineering(IJEREEE)

Monthly Journal for Electrical and Electronic Engineering

ISSN : 2395-2717 (Online)

Investigation of Modernized Numerical Relay with Watchdog Timers to Achieve Reliability

Author : Asha.K 1 Meghana.S.N 2 Vijaya Kumara.M.G 3 Teli Rekha Appasaheb 4 Manjunatha S 5

Date of Publication :7th November 2016

Abstract: The recent trend in protection has been a shift to numerical relay protection techniques, thanks to the development using the single chip digital signal processors with high crunching capability, which has made it possible to design digital filters in real time. In the protection field, numerical techniques have got first application to line protection, and other complementary functions like fault locator, disturbance recorder & auto-reclosing. The present work describes latest salient features of the numerical protection technology, different multifunctional relays going to be installed in modern power system protection and their methods of protection. Malfunction of relay protection is one of the main causes of the heavy failures that periodically occur in power systems all over the world. Thus the reliability of a power system depends on the reliability of relay protection in many respects. Watchdog timers are an excellent way to insure that a microprocessor based system continues to operate unattended if occasional failures occur. The way that a watchdog timer does its job is to monitor a particular signal sent by the microprocessor.

Reference :

    1. Vladimir Gurevich, Reliability of MicroprocessorBased Relay Protection Devices: Myths and Reality, Serbian journal of electrical engineering vol. 6, no. 1, May 2009, 167-186.
    2. R.K. Hunt: Hidden Failure in Protective Relays: Supervision and Control, Thesis to Master of Science in Electrical Engineering, Virginia Polytechnic Institute, 1998
    3. E.V. Konovalova: Main Results of Relay Protection Devices Maintains in Power Systems in the Russian Federation, Relay Protection and Automatics of Power Systems Conference, Moscow, 2002.
    4. G. Johnson, M.Thomson: Reliability Consideration of Multifunction Protection, Protective Relaying Conference, 2001.
    5. V. Gurevich: Microprocessor-based Relay of Protection: An Alternative View, Electro-info, No. 4, 2006.
    6. C.R. Heising, R.C. Patterson: Reliability Expectations for Protective Relays, Developments in Power Protection Fourth International Conference in Power Protection, 1989, pp. 23-26.
    7. I.A. Henderson, J. McGhee, W. Szaniawski, P. Domaradzki: Incorporating High Reliability into the Design of Microprocessor-based Instrumentation, Science, Measurement and Technology, IEE Proceedings A, Vol. 138, No. 2, 1991, pp. 105-112.

Recent Article