Double-K Differential Protection Principle of Regional Power Grid Based on Voltage Vector Compensation

Abstract In the regional active distribution network where the Distributed Generation (DG) penetration rate is getting higher and higher. When a high-resistance ground fault occurs in a heavy-load line, the traditional current differential protection has very low sensitivity, the protection may refu...

Full description

Saved in:
Bibliographic Details
Published inJournal of physics. Conference series Vol. 2166; no. 1; pp. 12014 - 12023
Main Authors Gao, Meijin, Zhu, Yanhan, Zhang, Xiao, Fang, Xinyan
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2022
Subjects
Compensation
Distributed generation
Electric potential
Electric power grids
Penetration resistance
Physics
Sensitivity
Voltage
Online AccessGet full text

Cover

More Information
Summary:Abstract In the regional active distribution network where the Distributed Generation (DG) penetration rate is getting higher and higher. When a high-resistance ground fault occurs in a heavy-load line, the traditional current differential protection has very low sensitivity, the protection may refuse to act. And the power differential protection has the voltage dead zone. In addition, the T-type branch will further reduce the sensitivity of the traditional differential protection. In order to solve the problems, this paper proposes a new principle of double- K differential protection with voltage vector compensation. The principle can flexibly adjust the braking zone range by setting two parameters, and then introduce the voltage vector to compensate the operating point, which effectively improves the protection sensitivity in the case of high-resistance ground fault occurs in a heavy-load line, and there is no voltage dead zone. Simulation shows that the principle can greatly improve the reliability of protection.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2166/1/012014