ISSN E 2409-2770
ISSN P 2521-2419

A Novel Principle of Current Differential Protection for UHV and EHV Transmission Lines Based on Distributed Parameters Line Model

Vol. 2, Issue 4, PP. 48-53, April, 2015


Keywords: Current differential protection, ultra high voltage and extra high voltage, capacitive current, linear interpolation, distributed parameters line model

Download PDF

Distributed capacitive current of ultra high voltage and extra high voltage (UHV&EHV) transmission lines has a severe negative effect on current differential protection. The current differential protection in this proposed paper is based on distributed parameters line model of the transmission line and has been used to solve the problem of distributive capacitive current of transmission line. Time-domain algorithm has been used to calculate currents at the set point of the line by using both ends current. By adding linear interpolation with low computational rate at each sampling points has been achieved. The theoretical analysis of this method is broach to demonstrate how the novel principle is of high sensitivity in differentiating between the external and the internal faults of the line. After theoretical analysis and applying the pristine novel principle of current differential protection for UHV and EHV transmission lines based on distributed parameters line model, the simulation results illustrates that the analysis done in this paper is quite appropriate as desired, correspondingly this recently acquired principle is much reliable, compared to the traditional principle.  

    This work is supported by National Natural Science Foundation of China through grants No. 51037005, 51177127 and National Basic Research Program of China (973 Program) (2012CB215105).   


       M. Arshad Shehzad Hassan, Xi’an Jiaotong University, Xi’an, China, Email:, Tel: +92-0344-7306780

       Guobing Song, Xi’an Jiaotong University, Xi’an, China, Email:, Tel: +86-13572131892

       Xiaoning Kang, Xi’an Jiaotong University, Xi’an, China, Email:, Tel: +86-13519195338

       Zaibin Jiao, Xi’an Jiaotong University, Xi’an, China, Email:, Tel: +86-13572881504

       Sohaib Tahir, Xi’an Jiaotong University, Xi’an, China, Email:, Tel: +92-0332-6699333

       Nouman Faiz, COMSATS Institute Of Information Technology , Islamabad, Pakistan, Email:, Tel: +92-0334- 7076102

M. Arshad Shehzad Hassan Guobing Song Xiaoning Kang Zaibin Jiao Sohaib Tahir Nouman Faiz

[1]     Yan, L. I., De_shu, C. H. E. N., Zhang, Z., & Xiang_gen, Y. I. N. (2001). The emulation analysis for the influence of capacitance current of UHV transmission line on differential current protection and compensating countermeasure [J]. Relay, 29(6), 6-9.

[2]     Yuan, R., Chen, D., Yin, X., Zhang, Z., Ma, T., & Chen, W. (2000, January). Principle and property investigation of the transient current differential protection based on correlation analysis. In Power Engineering Society Winter Meeting, 2000. IEEE (Vol. 3, pp. 1945-1949). IEEE.

[3]     Shi L, Wang G, Zhao J. Adaptive current differential protection for transmission lines [J]. Presented at the 8th IEE Int. Conf. Developments in Power System Protection, April 2004, vol. 2, pp. 424–427.

[4]     Li, K. K., Gang, W., Baoji, Y., & Jiali, H. (2001). Implementation of adaptive dispersed phase current differential protection for transmission lines. In IEE Conference Publication (No. 478, pp. 64-69).

[5]     Ito, H., Shuto, I., Ayakawa, H., Beaumont, P., & Okuno, K. (2001). Development of an improved multifunction high speed operating current differential relay for transmission line protection. In Developments in Power System Protection, 2001, Seventh International Conference on (IEE) (pp. 511-514). IET.

[6]     Bi, T. S., Y. L. Yu, S. F. Huang, and Q. X. Yang. "An accurate compensation method of distributed capacitance current in differential protection of UHV transmission line." In Power Engineering Society General Meeting, 2005. IEEE, pp. 770-774. IEEE, 2005.

[7]     Yekai, Wu, and Zou Dongxia. "The Influence of Capacitance Current to differential Protection and Its Compensation Scheme [J]." Relay 25, no. 4 (1997): 4-8.

[8]     Yining, Zhang, and Suonan Jiale. "Phaselet-based current differential protection scheme based on transient capacitive current compensation." Generation, Transmission & Distribution, IET 2.4 (2008): 469-477.

[9]     Jiale, Suonan, Zhang Yining, Qi Jun, and Jiao Zaibin. "Current Differential Protection Based on Time-Domain Algorithm of Capacitive Current Compensating." JOURNAL-XIAN JIAOTONG UNIVERSITY 39, no. 12 (2005): 1370.

[10]  Suonan J, Liu K, Song G. A novel UHV/EHV transmission-line pilot protection based on fault component integrated impedance [J]. Power Delivery, IEEE Transactions on, 2011, 26(1): 127-134.

[11]  Suonan J, Deng X, Liu K. Transmission line pilot protection principle based on integrated impedance [J]. Generation, Transmission & Distribution, IET, 2011, 5(10): 1003-1010.

[12]  Song, Guobing, Jiale Suonan, Qingqiang Xu, Ping Chen, and Yaozhong Ge. "Parallel transmission lines fault location algorithm based on differential component net." Power Delivery, IEEE Transactions on 20, no. 4 (2005): 2396-2406.

[13]  M. Arshad Shehzad Hassan, Guobing Song, Xiaoning Kang, Zaibin Jiao, Chenqing Wang, Sohaib Tahir, "Current Differential Protection for Distributed Transmission Lines using Low Sampling Frequency" International Journal of Engineering Works, Vol. 2, Issue 3, PP. 42-47, March, 2015.