Estimation and Application for Line Impedance Between IBR and POM
With the increasing integration of Inverter-Based Resources (IBRs) into power grids, accurate estimation of line impedance between the Point of Connection (POC) and the Point of Measurement (POM) has become critical to ensure stable and efficient reactive power control. However, conventional impedan...
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2025-06-01
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author | Woo-Hyun Kim Ye-Chan Kim Seung-Ho Song |
author_facet | Woo-Hyun Kim Ye-Chan Kim Seung-Ho Song |
author_sort | Woo-Hyun Kim |
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description | With the increasing integration of Inverter-Based Resources (IBRs) into power grids, accurate estimation of line impedance between the Point of Connection (POC) and the Point of Measurement (POM) has become critical to ensure stable and efficient reactive power control. However, conventional impedance estimation methods often face challenges such as power quality degradation and sensitivity to voltage unbalance. This paper presents a method to improve the reactive power control performance of Inverter-Based Resources (IBRs) by estimating the line impedance between the Point of Connection (POC) and the Point of Measurement (POM) and utilize the estimated impedance into control. The impact of voltage drop caused by line impedance on reactive power delivery is analyzed, and a compensation method is designed to mitigate the resulting control errors. The line impedance is estimated through a negative-sequence current injection technique, under the condition that the voltage phases at the two measurement points are synchronized. To address potential voltage unbalance issues that may arise during the injection process, a dedicated compensation algorithm is also proposed. The proposed algorithm is validated through both simulations and lab-scale experiments, demonstrating that the line impedance can be estimated with an error of less than 2%, while effectively compensating for reactive power distortion at the POM. |
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id | doaj-art-dd2a7f09beef4bf7a3762b4cfd3f9f79 |
institution | Matheson Library |
issn | 1996-1073 |
language | English |
publishDate | 2025-06-01 |
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series | Energies |
spelling | doaj-art-dd2a7f09beef4bf7a3762b4cfd3f9f792025-06-25T13:45:43ZengMDPI AGEnergies1996-10732025-06-011812313510.3390/en18123135Estimation and Application for Line Impedance Between IBR and POMWoo-Hyun Kim0Ye-Chan Kim1Seung-Ho Song2Department of Electrical Engineering, Kwangwoon University, Seoul 01897, Republic of KoreaDepartment of Electrical Engineering, Kwangwoon University, Seoul 01897, Republic of KoreaDepartment of Electrical Engineering, Kwangwoon University, Seoul 01897, Republic of KoreaWith the increasing integration of Inverter-Based Resources (IBRs) into power grids, accurate estimation of line impedance between the Point of Connection (POC) and the Point of Measurement (POM) has become critical to ensure stable and efficient reactive power control. However, conventional impedance estimation methods often face challenges such as power quality degradation and sensitivity to voltage unbalance. This paper presents a method to improve the reactive power control performance of Inverter-Based Resources (IBRs) by estimating the line impedance between the Point of Connection (POC) and the Point of Measurement (POM) and utilize the estimated impedance into control. The impact of voltage drop caused by line impedance on reactive power delivery is analyzed, and a compensation method is designed to mitigate the resulting control errors. The line impedance is estimated through a negative-sequence current injection technique, under the condition that the voltage phases at the two measurement points are synchronized. To address potential voltage unbalance issues that may arise during the injection process, a dedicated compensation algorithm is also proposed. The proposed algorithm is validated through both simulations and lab-scale experiments, demonstrating that the line impedance can be estimated with an error of less than 2%, while effectively compensating for reactive power distortion at the POM.https://www.mdpi.com/1996-1073/18/12/3135line impedance estimationnegative-sequence current injectionvoltage unbalance compensationreactive power control at POMinverter-based resource (IBR) |
spellingShingle | Woo-Hyun Kim Ye-Chan Kim Seung-Ho Song Estimation and Application for Line Impedance Between IBR and POM Energies line impedance estimation negative-sequence current injection voltage unbalance compensation reactive power control at POM inverter-based resource (IBR) |
title | Estimation and Application for Line Impedance Between IBR and POM |
title_full | Estimation and Application for Line Impedance Between IBR and POM |
title_fullStr | Estimation and Application for Line Impedance Between IBR and POM |
title_full_unstemmed | Estimation and Application for Line Impedance Between IBR and POM |
title_short | Estimation and Application for Line Impedance Between IBR and POM |
title_sort | estimation and application for line impedance between ibr and pom |
topic | line impedance estimation negative-sequence current injection voltage unbalance compensation reactive power control at POM inverter-based resource (IBR) |
url | https://www.mdpi.com/1996-1073/18/12/3135 |
work_keys_str_mv | AT woohyunkim estimationandapplicationforlineimpedancebetweenibrandpom AT yechankim estimationandapplicationforlineimpedancebetweenibrandpom AT seunghosong estimationandapplicationforlineimpedancebetweenibrandpom |