Improved algorithm of wide-area current differential protection based on non-uniform quantisation

Improved algorithm of wide-area current differential protection based on non-uniform quantisation

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Generation, Transmission & Distribution — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

Current differential protection characterised by whole-line quick action has now become the main concept in the research of the wide-area relay protection algorithm. However, strict requirements on broadband and real-time capability are difficult to meet in actual projects. Aiming at reducing the system traffic while not compromising the protection performance, the study proposes an improved algorithm of wide-area current differential protection based on non-uniform quantisation. The algorithm is proposed based on the information theory and in view of the non-uniform distribution of information redundancy of current signal in different width intervals. Comparing with traditional current differential protections, the improved algorithm is able to retain the sensitivity and reliability of the protection while reducing at least 44% of the system traffic whenever internal or external faults occur. It facilitates the realisation of wide-area differential protection in practice. Through digital simulation and dynamic simulation, the study demonstrates that the algorithm can distinguish fault places correctly and features a relatively high degree of sensitivity.


    1. 1)
      • 1. U.S-Canada Power System Outage Task Force: ‘Final report on the August 14, 2003 blackout in the United States and Canada: causes and recommendations’. Tech. Rep., 2004.
    2. 2)
      • 2. The Enquiry Committee, Ministry of Commerce and Industry, Government of India, New Delhi, India: ‘Report of the Enquiry Committee on grid disturbance in northern region on 30th July 2012 and in northern, eastern & northeastern region on 31st July 2012’, 2012.
    3. 3)
      • 3. Zhenxing, L., Xianggen, Y., Zhe, Z.: ‘Architecture and fault identification of wide-area relay protection system’, Telkomnika, 2012, 10, (3), pp. 442450.
    4. 4)
      • 4. Novosel, D., Bartok, G., Henneberg, G., et al: ‘IEEE PSRC report on performance of relaying during wide-area stressed conditions’, IEEE Trans. Power Deliv., 2010, 25, (1), pp. 316.
    5. 5)
      • 5. Begovic, M.M., Messina, A.R.: ‘Wide area monitoring, protection and control’, IET Gener. Transm. Distrib., 2010, 4, (10), pp. 10831085.
    6. 6)
      • 6. Dubey, R., Samantaray, S.R., Panigrahi, B.K.: ‘An spatiotemporal information system based wide-area protection fault identification scheme’, Int. J. Electr. Power Energy Syst., 2017, 89, pp. 136145.
    7. 7)
      • 7. Sharafi, A., Sanaye-Pasand, M., Aminifar, F.: ‘Transmission system wide-area back-up protection using current phasor measurements’, Int. J. Electr. Power Energy Syst., 2017, 92, pp. 93103.
    8. 8)
      • 8. Zhihui, D., Zengping, W., Yanjun, J.: ‘Reliability evaluation of the communication network in wide-area relay protection’, IEEE Trans. Power Deliv., 2011, 26, (04), pp. 25232530.
    9. 9)
      • 9. Hashemi, S.M., Tarafdar, H.M., Seyedi, H.: ‘A directional comparison scheme using the average of super imposed components’, IEEE Trans. Power Deliv., 2013, 28, (02), pp. 955964.
    10. 10)
      • 10. Radha, T., Millie, P., Kusum, D.: ‘Optimal coordination of over-current relays using modified differential evolution algorithms’, Eng. Appl. Artif. Intell., 2010, 23, (05), pp. 820829.
    11. 11)
      • 11. Tianxiang, D., Rongxiang, Y., Zhenfeng, X., et al: ‘Split-phase current differential protection of transmission line based on instantaneous power theory’, Electr. Power Autom. Equip., 2014, 34, (11), pp. 8288o+94.
    12. 12)
      • 12. Wen, J., Edwin, L.W.-H., Arons Patricia, L.: ‘Evolution pathway towards wide area monitoring and protection-A real-world implementation of centralized RAS system’, IEEE Trans. Smart Grid, 2014, 5, (3), pp. 15061513.
    13. 13)
      • 13. Jun, Y., Xiao-xin, Z.: ‘A survey on power system wide-area protection and control’, Power Syst. Technol., 2006, 30, (8), pp. 712o+30.
    14. 14)
      • 14. Peng, J., Lu, J., Wang, Y.: ‘Communication infrastructure design for WAMS’, Power Syst. Prot. Control, 2009, 37, (12), pp. 6267.
    15. 15)
      • 15. Wang, Y.G.: ‘Research on information management and communication technology of wide-area protection coping with power grid catastrophe’. PhD thesis, Huazhong University of Science & Technology, May 2010.

Related content

This is a required field
Please enter a valid email address