Real-Time Digital Processing of GPS Measurements for Transmission Engineering

Mensah-Bonsu,; Heydt,

doi:10.1109/mper.2002.4312606

Cited by 5 publications

(2 citation statements)

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“…+ a 10,11,12 S t−1,t,t+1 + a 13,14,15 T at−1,t,t+1 / a 3 (5) 400 V/6 V enclosed transformer connected with a 32 A, 415 V variac. In this test rig, current is controlled via the variac, the weather conditions experienced by the conductor are, however, the natural conditions prevailing at the time of test.…”

Section: Outdoor Experimentsmentioning

confidence: 99%

“…Several techniques have been applied for determining the DLR. These include weather-based methods [2,3], conductor temperature-based methods [4] and methods based on measuring sag [5][6][7][8] or tension in the conductor [9]. A test for the verification of the relationship relating conductor sag and tension to the conductor temperature is described in [10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimentally validated partial least squares model for dynamic line rating

Morrow

Abdelkader

2014

IET Renewable Power Generation

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This study presents a model based on partial least squares (PLS) regression for dynamic line rating (DLR). The model has been verified using data from field measurements, lab tests and outdoor experiments. Outdoor experimentation has been conducted both to verify the model predicted DLR and also to provide training data not available from field measurements, mainly heavily loaded conditions. The proposed model, unlike the direct measurement based DLR techniques, enables prediction of line rating for periods ahead of time whenever a reliable weather forecast is available. The PLS approach yields a very simple statistical model that accurately captures the physical performance of the conductor within a given environment without requiring a predetermination of parameters as required by many physical modelling techniques. Accuracy of the PLS model has been tested by predicting the conductor temperature for measurement sets other than those used for training. Being a linear model, it is straightforward to estimate the conductor ampacity for a set of predicted weather parameters. The PLS estimated ampacity has proven its accuracy through an outdoor experiment on a piece of the line conductor in real weather conditions.

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Section: Outdoor Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimentally validated partial least squares model for dynamic line rating

Morrow

Abdelkader

2014

IET Renewable Power Generation

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GPS/GNSS Current Bibliography

Soler

2004

GPS Solutions

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Review of Thermal Stress and Condition Monitoring Technologies for Overhead Transmission Lines: Issues and Challenges

et al. 2020

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The overhead transmission line system is one of the methods of transmitting electrical energy at a high voltage from one point to another, especially over long distances. The demand for electrical energy is increasing due to the increase in the world population, the evolution of transport technology, and economic expansion, thereby resulting in overloading to the overhead line (OHL) system. In building new infrastructure for transmission lines, several issues need to be addressed. Thus, optimizing existing power by increasing the ampacity of power line is a practical solution to meet energy demand issues. During long-term operation, the temperature of OHL conductors may increase beyond their rated temperature, which is typically 75 °C for conventional conductors such as aluminum-conductor steel-reinforced cable. This condition is defined as thermal stress, which results in lower sag vertical clearance, tensile loss, elongation and creep, and reduced life span of the conductors. This condition must be avoided to ensure that the line is not permanently elongated, which can disrupt the vertical ground clearance, and to expand the conductor's life. Other factors such as lightning, wildfire, aging, and degradation of the conductor can also cause thermal stress on the conductors and have thermal effects on the conductor's performance. Therefore, unwanted thermal stress needs to be examined and identified by monitoring the thermal effect and behavior of the lines. This paper presents the state of the art in monitoring technologies that can be used to identify thermal stress on OHL conductors, including the issues and challenges in monitoring. At the end of this paper, a few suggestions are included to address the occurrence and assessment of thermal stress in lines. Ultimately, this work may provide complete information to researchers and maintenance engineers to enable them to make better decisions on condition monitoring, operation, and maintenance of the system. INDEX TERMS Overhead transmission line, thermal rating, conductor temperature, thermal stress effect, conditioning monitoring.

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Real-Time Digital Processing of GPS Measurements for Transmission Engineering

Cited by 5 publications

References 0 publications

Experimentally validated partial least squares model for dynamic line rating

Experimentally validated partial least squares model for dynamic line rating

GPS/GNSS Current Bibliography

Review of Thermal Stress and Condition Monitoring Technologies for Overhead Transmission Lines: Issues and Challenges

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