Study on Decision Method of Neutral Point Grounding Mode for Medium-Voltage Distribution Network

Hengyong Liu^1*, Xiaofu Xiong², Jinxin Ouyang², Xiufen Gong², Yinghua Xie¹, Jing Li¹

¹Shenzhen Power Supply Co. Ltd., Shenzhen, China.
²State Key Laboratory of Power Transmission Equipments & System Security and New Technology, College of Electrical Engineering, Chongqing University, Chongqing, China.

DOI: 10.4236/jpee.2014.24088                

Abstract

The neutral grounding mode of medium-voltage distribution network decides the reliability, overvoltage, relay protection and electrical safety. Therefore, a comprehensive consideration of the reliability, safety and economy is particularly important for the decision of neutral grounding mode. This paper proposes a new decision method of neutral point grounding mode for mediumvoltage distribution network. The objective function is constructed for the decision according the life cycle cost. The reliability of the neutral point grounding mode is taken into account through treating the outage cost as an operating cost. The safety condition of the neutral point grounding mode is preserved as the constraint condition of decision models, so the decision method can generate the most economical and reliable scheme of neutral point grounding mode within a safe limit. The example is used to verify the feasibility and effectiveness of the decision method.

Keywords

Distribution Network; Neutral Grounding Mode; Reliability; Decision Method; Objective Function

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Ping, S.-X. and Zhou, Y.-F. (2010) Power System Neutral Grounding Mode and Operation Analysis. China Electric Power Press, Beijing, 118-119.
[2]	Su, J.-F. (2013) Research of Neutral Grounding Modes in Power Distribution Network. Power System Protection and Control, 41, 143-147.
[3]	Guo, Q.-T. and Wu, T. (2010) Survey of the Methods to Select Fault Line in Neutral Point Ineffectively Grounded Power System. Power System Protection and Control, 38, 146-152.
[4]	Fu, X.-Q., Xu, L.-Z. and Zhao, B.-L. (2010) Discussion on the Technology and Application of 10 kV Distribution Network Neutral Grounding through Small Resistance. Power System Protection and Control, 38, 227-230.
[5]	Dai, K.-M. (2000) Analysis on Neutral Grounding of Distribution System. Power System Technology, 24, 52-55.
[6]	He, Z.-F. and Liu, P. (2002) Research of Neutral Point Grounding Modes in MV Distribution Network. Electric Power Automation Equipment, 22, 70-72.
[7]	Zhou, Y., Zhao, L.-J. and Kang, P. (2006) Neutral Grounding Mode of Urban Distribution Networks in Guizhou Province. Power System Technology, 30, 61-64.
[8]	Zhao, R., Tan, W.-P. and Yang, Y.-H. (2007) Analysis of Neutral Grounding Operation Modes for Distribution Network. RELAY, 35, 22-26.
[9]	Lin, Z.-C. (2004) The Selection and Application of Neutral Grounding Method of MV Network. High Voltage Engineering, 30, 60-64.
[10]	Liu, M.-Y. (2004) Selection of Neutral Grounding Modes in Power Distribution Network. Power System Technology, 28, 86-89.
[11]	Fu, Y.-S., Wang, Z.-G. and Kuang, S. (2006) Medium-Voltage Grid Grounding Comprehensive Selection Method. Power System Technology, 30, 101-106.
[12]	Liu, Y., Nie, Y.-X. and Peng, X.-G. (2010) Application Research on the Mode Selection of Neutral Grounding with Fuzzy Reasoning Method. Power System Protection and Control, 38, 32-36.
[13]	Cao, Z.-C., He, J.-S. and Yang, X.-C. (2007) Interval Analysis about Influence on Reliability of Power Distribution Lines with Various Grounded Neutrals. Guangxi Power, 5-7.
[14]	Cao, Z.-C.,Wang, W.-L.,Yang, X.-C., et al. (2007) Decision Arithmetic of Neutral Grounding Mode Based on Interval Multiattribute Weighted Grey Target Theory. Guangxi Power, 1-5.
[15]	Ramirez-Rosado, I.J. and Dominguez-Navarro, J.A. (2006) New Multi-Objective Tabu Search Algorithm for Fuzzy Optimal Planning of Power Distribution Systems. IEEE Transactions on Power Systems, 21, 224-233. http://dx.doi.org/10.1109/TPWRS.2005.860946
[16]	Chen, D.-W. and Zhang, P.-M. (2011) Virtual Prototype Optimal Design of Intelligent AC Contactors Based on Artificial Fish-Swarm Algorithm. Transactions of China Electrotechnical Society, 26, 101-106.
[17]	Su, H.-F., Zhang, J.-H., Liang, Z.-R., et al. (2012) Substation LCC Planning Based on Refined Mean Clustering Random Particle Swarm Algorithm. Transactions of China Electrotechnical Society, 27, 209-214.
[18]	Luo, X.-C., Li, L. and Wei, Z.-L. (2011) Applications of Life Cycle Cost Theory in Decision-Making of Investment for Distribution Transformers Renovation. Power System Technology, 35, 207-210.
[19]	Li, B. and Shu, H.-C. (2012) Applications of Life Cycle Cost Theory in Decision-Making of Investment for Distribution Transformers Renovation. Transactions of China Electrotechnical Society, 27, 183-190.
[20]	Xu, J.-Z. and Li, Y. (2007) Reliability Assessment of Complex Distribution System Using GO Method. Transactions of China Electrotechnical Society, 22, 149-153.
[21]	Billinton, R., Kumar, S., Goel, L., et al. (1989) A Reliability Test System for Educational Purposes-Basic Data. IEEE Transactions on Power Apparatus and System, 4, 1238-1244. http://dx.doi.org/10.1109/59.32623
[22]	Ma, S.-C. (2008) Fault Location Techniques for Non-Effectively Earthed System Based on Transient Signals. Shandong University.