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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:   (284 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 is 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 that 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).
Full-Text [PDF 2117 kb]   (90 Downloads)    
Type of Study: Research Paper | Subject: Cable Modeling
Received: 2023/12/08 | Revised: 2024/10/19 | Accepted: 2024/10/16
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Creative Commons License
© 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.