Performance Analysis of a Dynamic Line Rating System Based on Project Experiences

Levente Rácz,Dimitar Zarchev,Valeri Mladenov,Bálint Németh,Gábor Göcsei

doi:10.3390/en15031003

Levente Rácz, Dimitar Zarchev + Show 3 more

Open Access

https://doi.org/10.3390/en15031003

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Abstract

This paper aims to demonstrate the performance and reliability analysis of a dynamic line rating (DLR) system at the Bulgarian demonstration site of the FLEXITRANSTORE project. As part of the project, various manufacturers’ different line monitoring DLR sensors and weather stations were installed on a 110 kV double-circuit overhead line (OHL). These devices provided input parameters to the DLR system based on objective measurements. This paper used statistical tools to examine the reliability and accuracy of installed devices, thus making products from different manufacturers comparable. In addition, two independent line monitoring and DLR models have been developed: the black-box and extended white-box models. The performances of the two models were analyzed for the same input parameters and compared to the field measurements. Based on the presented results, the reliability and accuracy of the applied weather stations of different companies were almost the same. This conclusion cannot be said for DLR line monitoring sensors, where the devices could be differentiated based on reliability and measurement accuracy results. In terms of models, the usability of the extended white-box model seemed to be limited in certain weather conditions, implicating a more significant role for soft-computing-based DLR models in the future. In addition to the results, root causes for the errors and future directions that may provide a framework for further research are also presented.

Highlights

Changes in the electricity system pose constant challenges for system operators to improve their grid and utilization levels [1,2]
This paper aims to demonstrate the performance and reliability analysis of a dynamic line rating (DLR) system at the Bulgarian demonstration site of the FLEXITRANSTORE project
In the implemented DLR system in the framework of the FLEXITRANSTORE project, the proper data collection and reliable operation of the sensors are as important as the precise calculation of the models because these devices provide the input data

Summary

Introduction

Changes in the electricity system pose constant challenges for system operators to improve their grid and utilization levels [1,2]. Dynamic line rating (DLR) is a novel method that offers a cost-effective solution to adjust the transmission capacity of power lines to the prevailing environmental conditions in real time [5,6,7]. It can be efficiently applied for congestion management and avoid network curtailment [8]. Another significant advantage of applying the DLR method is that a complex system can be built around itself that can monitor various sections’ thermal parameters and sag-clearance issues in real-time and cope with the challenges of power

Objectives

Results

Conclusion