Abstract
The voltage transformer in the substation convert high voltage into low voltage, and its second circuit must be grounded at one point through the zero phase line N600. The long-term existence of N600 multi-point grounding increase the possibility of power grid accident. This situation is usually found through patrol inspection. However, the patrol inspection is conducted every six months, the circle is so long that the problem cannot be identified in time. This paper proposes a method to identify and find the N600 multiple grounding point in real time. It judges the situation of multi-point grounding through the changes of N600 grounding current value, and determines the position of redundant grounding point through working event in the substation when the event happens, to achieve real-time monitoring of multi-point grounding situation of N600. In addition, this paper also implemented an N600 grounding current monitoring device and an N600 multi-point grounding monitoring and decision-making system, and verified the effectiveness and real-time performance of this method and the system in a testing environment.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Hou, D., Roberts, J.: Capacitive voltage transformer: transient overreach concerns and solutions for distance relaying. In: Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering, vol. 1, pp. 119–125 (1996)
Felipe, L.P., Mauricio, V.F.L., Stefan, T.: Modeling of a capacitive voltage transformer for evaluation of transient response in conformity with the IEC 61869-5 standard. Electr. Power Syst. Res. 223, 109591 (2023)
Zhang, Y.: Effect of N600 line breakage upon the operation of protection device. Shaanxi Electr. Power (2007)
Zhong, W.: Searching and treatment for multipoint earthing of N600 in secondary circuit of voltage transformer. Sichuan Electr. Power Technol. (2012)
Yu, C., LF, Y., Hu, K.B.: Hazard analysis of multipoint grounding of secondary circuit of voltage transformer in power plant. Electron. Test (2022)
Zhu, J.: Analysis and treatment of a detect of excessive grounding current at N600 one-point in 220 kV substation. Electr. Eng. (2020)
Xue, S., Sun, W., Yang, J., Gao, F., Li, Y., Li, Z.: Hidden failure identification and protection of multi-grounding fault in secondary circuit of potential transformer. IEEJ Trans. Elec. Electron. Eng. 11, 300–307 (2016)
Amir, H.E., Fotuhi-Firuzabad, M.,: New considerations in modern protection system quantitative reliability assessment. IEEE Trans. Power Deliv. 25(4), 2213–2222 (2010)
Cheng, X.S., Cheng, F.B., Cheng, J.P.: The anylasis about N600 uncorrect connecting leads. J. Electr. Power (2005)
Wang, Z., Kong, F., Tang, Y.: Analysis of protection misoperation of power-frequency variation caused by error connection of N600. Electr. Eng. (2018)
Zhao, C.L., Cui, J.P., Xu, M.Y., Dong, Y.F., Dong, E., Guo, H.Y.: Analysis of Line protection mal-operation caused by abnormal grounding of voltage secondary circuit. In: 2022 IEEE International Conference on Artificial Intelligence and Computer Applications, pp. 152–155 (2022)
Yu, L.F., Yu, C., Zhang, S., Huang, X.: Search method and preventive measures for N600 multi-point grounding of secondary circuit of distributed voltage transformer. Lamps Lighting (2021)
Zhao, W., Gao, C., Lin, H.: One-point grounding detection of PT secondary circuit and multi grounding points searching method. Electr. Power Autom. Equipment 30, 148–150 (2010)
Zhao, J.D.: Detection device and method for one-point grounding of voltage transformation secondary circuit N600 (2012)
Wang, H.X.: Appearance is seeked to passive formula voltage transformer secondary circuit N600 multipoint earthing (2015)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2024 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Diao, Y., Zhang, R. (2024). The Method and Application of Discrimination and Search for Multi-point Grounding of N600 in Secondary Circuit of Voltage Transformer in Substation. In: Dong, J., Zhang, L., Cheng, D. (eds) Proceedings of the 2nd International Conference on Internet of Things, Communication and Intelligent Technology. IoTCIT 2023. Lecture Notes in Electrical Engineering, vol 1197. Springer, Singapore. https://doi.org/10.1007/978-981-97-2757-5_1
Download citation
DOI: https://doi.org/10.1007/978-981-97-2757-5_1
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-97-2756-8
Online ISBN: 978-981-97-2757-5
eBook Packages: Computer ScienceComputer Science (R0)