Volume 21, Issue 1 (March 2025)                   IJEEE 2025, 21(1): 3141-3141 | Back to browse issues page

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Ramezani N, Shahnazdoost Kilvaei M. A New Procedure Based on Continuous RTU Measurement to Estimate Multi-port Thevenin Equivalent Circuit Parameters of an External Power System. IJEEE 2025; 21 (1) :3141-3141
URL: http://ijeee.iust.ac.ir/article-1-3141-en.html
A New Procedure Based on Continuous RTU Measurement to Estimate Multi-port Thevenin Equivalent Circuit Parameters of an External Power System
Nabiollah Ramezani , Mohsen Shahnazdoost Kilvaei
Abstract:   (560 Views)
In this paper, a novel method is presented that can accurately estimate the Thevenin equivalent circuit parameters of an external power system by RTUs. The presented method is based on the simultaneous measurements of the desired points in the boundary system, which includes the bus voltage amplitude, the current amplitude of the boundary transmission lines, as well as active and reactive power, and is continuously active until the Thevenin equivalent circuit model would be available online. The practical application of the proposed method is related to online monitoring and control of wide-area power systems as well as their development design. Also, the innovation of the method is the accurate estimation of the Thevenin equivalent circuit model from part of the power network where information is not available. In the proposed method, an additional measurement and the least squares method are used to eliminate measurement errors in order to accurately estimate the parameters of the equivalent circuit model. In order to avoid providing the wrong equivalent circuit model due to external system changes, a method is presented that can track the correct system changes to continuously monitor the disturbances. The proposed method performance has been implemented and validated by DigSILENT software.
Keywords: Thevenin equivalent circuit, Continuous synchronized amplitude measurement, Equivalent external system, Remote measurement unit (RTU).
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Type of Study: Research Paper | Subject: Cable Modeling
Received: 2023/12/08 | Revised: 2025/01/08 | Accepted: 2024/10/16
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© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.