International Science Index


10007589

Field-Programmable Gate Array Based Tester for Protective Relay

Abstract:

The reliability of the power grid depends on the successful operation of thousands of protective relays. The failure of one relay to operate as intended may lead the entire power grid to blackout. In fact, major power system failures during transient disturbances may be caused by unnecessary protective relay tripping rather than by the failure of a relay to operate. Adequate relay testing provides a first defense against false trips of the relay and hence improves power grid stability and prevents catastrophic bulk power system failures. The goal of this research project is to design and enhance the relay tester using a technology such as Field Programmable Gate Array (FPGA) card NI 7851. A PC based tester framework has been developed using Simulink power system model for generating signals under different conditions (faults or transient disturbances) and LabVIEW for developing the graphical user interface and configuring the FPGA. Besides, the interface system has been developed for outputting and amplifying the signals without distortion. These signals should be like the generated ones by the real power system and large enough for testing the relay’s functionality. The signals generated that have been displayed on the scope are satisfactory. Furthermore, the proposed testing system can be used for improving the performance of protective relay.

References:
[1] A. kG. Phadke, T. Hlibka, M. Ibrahim, “A digital computer system for EHV Substation: Analysis and Field Tests”, IEEE Trans. Power Apparatus and System, Vol. PAS-95, 1976, pp. 291-301.
[2] K.C.A. Dierks, Relay Specific Computer Aided Testing for Protective Relays, Eskom, Republic of South Africa 2006.
[3] Relay testing and commissioning (Online). Available: http://www.fecime.org/referencias/npag/chap21-370-397.pdf (Retrieved on 17/12/2016).
[4] M. Chafai, H. Bentarzi, A. Ouadi, A. Zitouni and A. Recioui, “PC based Testing System for Protective Relay”, in Proc. 4th International Conference on Power Engineering, Energy and Electrical Drives, Istanbul, Turkey, 13-17 May 2013.
[5] A. Ouadi, H. Bentarzi, M. Chafai and A. Zitouni, “Microcontroller Based Protective Relay Testing System,” in Proc. The 10th WSEAS International Conference on Circuits, Systems, Electronics, Control & Signal Processing (CSECS '11), Montreux University, Switzerland, December, 29-31, 2011.
[6] National Instruments, NI R Series Multifunction RIO User Manual, 2009.
[7] M. Chafai, H. Bentarzi, and A. Ouadi, “A New Frame Work for Protective Relay Tester “NNGT Journal: International Journal of Signal Processing and Imaging Engineering, Vol. 1, pp.60 -65, (2014).
[8] Texas Instruments, LMx24-N, LM2902-N Low-Power, Quad-Operational Amplifiers, 2015.