NDLI: Optimisation-based algorithm for constructing first zone of distance protection for flexible power lines

Content Provider	IET Digital Library
Author	Davydova, Nadezhda Shchetinin, Dmitry Hug, Gabriela
Abstract	The conventional first zone characteristic of distance protection is constructed mainly based on engineering experience, which limits its coverage of internal faults. The zone coverage is also adversely affected by the installation of series compensation devices with over-voltage protection. Despite research efforts to overcome these problems, developing an algorithm for constructing an optimal first zone characteristic that encloses only all separable internal faults remains a challenging task. This study addresses this issue by presenting an optimisation-based algorithm for constructing an adaptive optimal first zone characteristic for power lines. The algorithm takes into account different locations of the compensation devices along the line, their non-linear protection, and the inaccuracies in measurements and considered grid model. The proposed and conventional zone construction algorithms are compared using a grid model in MATLAB Simulink. The results demonstrate that the proposed algorithm is robust to input parameters and thus able to construct an optimal zone characteristic for a specified range of grid operating points and fault parameters. Moreover, the first zone obtained by the proposed algorithm covers substantially more internal faults than the conventional zone with optimised settings.
Starting Page	4666
Ending Page	4674
Page Count	9
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 21, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.1765
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-07-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Conventional Zone Construction Algorithm Distance Protection Engineering Experience Fault Parameter Flexible Power Line Grid Model Nonlinear Protection Optimal Zone Characteristic Optimisation Optimisation Technique Optimisation-based Algorithm Optimised Settings Over-voltage Protection Power Grid Power System Control Power System Protection Power System Simulation Power System Stability Power Transmission Control Power Transmission Line Power Transmission Protection Power Transmission Reliability Proposed Zone Construction Algorithm Reliability Separable Internal Fault Series Compensation Device Zone Coverage
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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