Incorporating Temperature Variations Into Transmission-Line Models

Cecchi, Valentina; Leger, Aaron St.; Miu, Karen; Nwankpa, C.O.

doi:10.1109/tpwrd.2011.2159520

Cited by 61 publications

(42 citation statements)

References 15 publications

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“…In such a case, the information about the current temperature of a conductor can be used to update the line resistance given by the model [26−30]. Such an adjustment of the model makes it applicable for the system state estimation purposes [29].…”

Section: Dynamic Line Rating Systems Taking Into Account Wire Temperamentioning

confidence: 99%

“…Dependence of the conductor resistance on the temperature is a disturbance that can be measured by a DLR device and next used to update the existing model system. Even if the measurements are accurate, error encumbered parameters of the model can lead to non-optimal estimation solutions and a decreased accuracy of the estimation [7,29].…”

Section: Estimation Of the Power System State With Taking Into Accounmentioning

confidence: 99%

“…The mentioned factors determine the temperature of a conductor, which directly affects its resistance. Thus, the real resistance of a system element differs from that of the model that is used for the estimation purposes [29].…”

mentioning

confidence: 99%

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Power System State Estimation Accuracy Enhancement Using Temperature Measurements of Overhead Line Conductors

Wydra

Kacejko

2016

Metrology and Measurement Systems

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Power system state estimation is a process of real-time online modeling of an electric power system. The estimation is performed with the application of a static model of the system and current measurements of electrical quantities that are encumbered with an error. Usually, a model of the estimated system is also encumbered with an uncertainty, especially power line resistances that depend on the temperature of conductors. At present, a considerable development of technologies for dynamic power line rating can be observed. Typically, devices for dynamic line rating are installed directly on the conductors and measure basic electric parameters such as the current and voltage as well as non-electric ones as the surface temperature of conductors, their expansion, stress or the conductor sag angle relative to the plumb line. The objective of this paper is to present a method for power system state estimation that uses temperature measurements of overhead line conductors as supplementary measurements that enhance the model quality and thereby the estimation accuracy. Power system state estimation is presented together with a method of using the temperature measurements of power line conductors for updating the static power system model in the state estimation process. The results obtained with that method have been analyzed based on the estimation calculations performed for an example system − with and without taking into account the conductor temperature measurements. The final part of the article includes conclusions and suggestions for the further research.

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Section: Dynamic Line Rating Systems Taking Into Account Wire Temperamentioning

confidence: 99%

Section: Estimation Of the Power System State With Taking Into Accounmentioning

confidence: 99%

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Power System State Estimation Accuracy Enhancement Using Temperature Measurements of Overhead Line Conductors

Wydra

Kacejko

2016

Metrology and Measurement Systems

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“…The average model and the weighted average model adopt the traditional mathematical method to establish a single lumped parameter model of the transmission line [10]. Using these two models, the accuracy of the results is improved, but it still has a certain gap from the actual situation.…”

Section: Introductionmentioning

confidence: 99%

Study on Operating Status of Overhead Transmission Lines Based on Wind Speed Variation

Yang¹,

Zhou²,

Wang³

et al. 2017

PIER M

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Abstract-In the spatial dimension, the variation of the wind speed along the overhead transmission line makes the conductor temperature and line parameter show a nonuniform distribution characteristic, which has an important influence on the operating status of the system. In order to describe the actual situation more accurately, a line division model based on the wind speed variation along the line is proposed. This paper proves the application value of the model by using a typical 4-bus system. From the two aspects of the power flow and maximum power transmission capacity, we contrast the line division model with the traditional models, indicating that the division model is closer to the actual situation of the system.

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“…When the transmission line load was short circuited or broken, the influence of transmission line segmentation model on the spectrum was analyzed in [7]. The line segmentation method was provided based on frequency and temperature in [8] and [9,10] respectively, which were carried out in hardware experiment at power system laboratory in Drexel University. These researches focus on the influence of the frequency and temperature segmentation on the system load flow wave attenuation and phase changes.…”

Section: Introductionmentioning

confidence: 99%

Transmission Line Model Considering Nonuniform Temperature Distribution at Different Locations

Wang¹,

Yang²,

Liang³

et al. 2017

PIER M

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Abstract-The temperature variation throughout overhead transmission lines has an important effect on the line operation. In order to describe the actual operation of transmission lines more accurately, this paper proposes a line segmentation method based on temperature distribution at different locations. Taking the actual transmission line of Shaanxi Province as a test case, the influence of the different temperature calculation methods on the maximum transmission power of lines is studied under the lumped parameter model and the distributed parameter model, respectively. It is shown that the transmission line model considering nonuniform temperature distribution at different locations is more accurate for studying the operating state of the system.

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Incorporating Temperature Variations Into Transmission-Line Models

Cited by 61 publications

References 15 publications

Power System State Estimation Accuracy Enhancement Using Temperature Measurements of Overhead Line Conductors

Power System State Estimation Accuracy Enhancement Using Temperature Measurements of Overhead Line Conductors

Study on Operating Status of Overhead Transmission Lines Based on Wind Speed Variation

Transmission Line Model Considering Nonuniform Temperature Distribution at Different Locations

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