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This article examines the power flow and voltage profile of a transmission line system. A flexible alternating current transmission system (FACTS) device named unified power flow controller (UPFC) incorporating fuzzy logic controller (FLC) has been implemented to reduce power loss and enhance voltage profile after the current network analysis was completed. Utilizing Newton-Raphson load flow analysis, the weakest bus in a system is identified for the installation of UPFC. The 341-km-long, 230 kV line that runs from Bahir Dar to Alamata serves as the validation point for this controller’s operation. Therefore, to demonstrate the performance of FLC-UPFC, a comparison has been done using conventional proportional-integral (PI)-based UPFC, FLC-UPFC, and without UPFC at the same load bus. For example, receiving end voltage improves by 11% when PI-UPFC is used, while real and reactive power flows improve by 13.7% and 8.6%, respectively. Voltage rises by 14.9% when the recommended FLC-UPFC is used, while the real and reactive power flows have improved by 21.6% and 15.05%, respectively. The findings indicate that the FLC-UPFC technique, which is being proposed, performs better than the conventional PI controller.

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Voltage Profile Improvement and Loss Minimization in a Transmission Line Using FLC-Based UPFC at Bahir Dar Substation-II 230 kV Line

  • 会议论文

  • 发表日期：

    2025年

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  • Minale Birlie

摘要

This article examines the power flow and voltage profile of a transmission line system. A flexible alternating current transmission system (FACTS) device named unified power flow controller (UPFC) incorporating fuzzy logic controller (FLC) has been implemented to reduce power loss and enhance voltage profile after the current network analysis was completed. Utilizing Newton-Raphson load flow analysis, the weakest bus in a system is identified for the installation of UPFC. The 341-km-long, 230 kV line that runs from Bahir Dar to Alamata serves as the validation point for this controller’s operation. Therefore, to demonstrate the performance of FLC-UPFC, a comparison has been done using conventional proportional-integral (PI)-based UPFC, FLC-UPFC, and without UPFC at the same load bus. For example, receiving end voltage improves by 11% when PI-UPFC is used, while real and reactive power flows improve by 13.7% and 8.6%, respectively. Voltage rises by 14.9% when the recommended FLC-UPFC is used, while the real and reactive power flows have improved by 21.6% and 15.05%, respectively. The findings indicate that the FLC-UPFC technique, which is being proposed, performs better than the conventional PI controller.