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Open AccessArticle

An Adaptive Differential Protection and Fast Auto-Closing System for 10 kV Distribution Networks Based on 4G LTE Wireless Communication

1
School of Automation, Foshan University, Foshan 528225, China
2
Dispatching and Control Center, China Southern Power Grid Co. Ltd., Guangzhou 510080, China
3
Department of Distribution Automation, Beijing Sifang Automation Co. Ltd., Beijing 100085, China
*
Author to whom correspondence should be addressed.
Future Internet 2020, 12(1), 2; https://doi.org/10.3390/fi12010002
Received: 15 October 2019 / Revised: 25 November 2019 / Accepted: 18 December 2019 / Published: 20 December 2019
(This article belongs to the Special Issue Global Trends and Advances Towards a Smarter Grid and Smart Cities)
With the development of wireless communication technology and computer technology, more and more smart technologies have been applied in electricity distribution networks. This paper presents an adaptive current differential protection and fast auto-closing system for application in 10 kV distribution networks in China Southern Power Grid. The current differential protection can adaptively change its settings according to the topology change of the primary distribution networks, thus the system effectively reduces the operation and maintenance cost of the power distribution network. In order to restore the power supply for the healthy part of the 10 kV networks quickly after a power system fault is cleared, the protection and control system provides wide area control function for automatic fault isolation and automatic switching. The traditional overcurrent protection and control system have no fault location function, it may take several minutes or even hours to manually locate a fault and then restore the power supply. Compared with the protection and control system of the traditional 10 kV distribution networks, the system developed can locate and isolate faults within 900 ms (assuming that the operating time of the load switch is 700 ms), and can quickly restore power supply in less than one second after a power system fault is cleared. View Full-Text
Keywords: adaptive current differential protection; auto-closing; distribution network; wireless communication adaptive current differential protection; auto-closing; distribution network; wireless communication
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MDPI and ACS Style

An, W.; Ma, J.J.; Zhou, H.Y.; Chen, H.S.; Jun, X.; Jian, X. An Adaptive Differential Protection and Fast Auto-Closing System for 10 kV Distribution Networks Based on 4G LTE Wireless Communication. Future Internet 2020, 12, 2.

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