New Method for Zero Potential Non-stop Operation of Distribution Network Based on Injection Current
Journal of Electrical and Electronic Engineering
Volume 7, Issue 6, December 2019, Pages: 163-169
Received: Nov. 4, 2019; Published: Dec. 12, 2019
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Authors
Zhu Liang, Hunan transmission Maintenance Company, Changsha, China; Live Inspection and Intelligent Operation Technology State Grid Corporation Laboratory, Changsha, China
Wang Zhenyu, Hunan transmission Maintenance Company, Changsha, China; Live Inspection and Intelligent Operation Technology State Grid Corporation Laboratory, Changsha, China
Yang Qi, Hunan transmission Maintenance Company, Changsha, China; Live Inspection and Intelligent Operation Technology State Grid Corporation Laboratory, Changsha, China
Xu Li, Hunan transmission Maintenance Company, Changsha, China; Live Inspection and Intelligent Operation Technology State Grid Corporation Laboratory, Changsha, China
Guo Hao, Hunan transmission Maintenance Company, Changsha, China; Live Inspection and Intelligent Operation Technology State Grid Corporation Laboratory, Changsha, China
Pen Shasha, Hunan transmission Maintenance Company, Changsha, China; Live Inspection and Intelligent Operation Technology State Grid Corporation Laboratory, Changsha, China
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Abstract
In the case of live working in the distribution network, a live method of live working that satisfies the requirements for personal safety and power supply reliability needs to be studied, because of the serious safety accidents caused by misuse and weak safety awareness. Based on the zero potential characteristics of the operating point, a new method based on injection current for zero-potential uninterrupted operation in distribution network is proposed. The Floyd algorithm is used to calculate the shortest electrical distance from the live working point to the substation, and the capacitance value of the ground is measured by the resonant grounding system, and the current value injected further to the neutral point is calculated. By regulating the zero-sequence voltage, the neutral point voltage is equal to the difference between the operating phase line voltage drop and the operating phase power supply voltage, ensuring that the operating point voltage is zero. Finally, based on the PSCAD simulation software, the system model is established. The simulation verifies the feasibility of the proposed method by comparing the voltage curves of the working phase.
Keywords
Distribution Network, Voltage Control, Floyd Algorithm, Resonant Grounding System, Operating Device
To cite this article
Zhu Liang, Wang Zhenyu, Yang Qi, Xu Li, Guo Hao, Pen Shasha, New Method for Zero Potential Non-stop Operation of Distribution Network Based on Injection Current, Journal of Electrical and Electronic Engineering. Vol. 7, No. 6, 2019, pp. 163-169. doi: 10.11648/j.jeee.20190706.15
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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