Applicability of Dynamic Thermal Line Rating for Long Lines

Dawson, Leanne; Knight, Andrew M.

doi:10.1109/tpwrd.2017.2691671

Cited by 34 publications

(16 citation statements)

References 19 publications

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“…Assuming that z is the collection of meteorological data such as wind speed, wind direction and ambient temperature at a certain time. The QDR of transmission lines under self-limiting and ambient environment can be calculated by Equations (2) and (3). When the current flowing through the line is QDR calculated, the actual operating temperature of the conductor T c under z is obtained by the heat balance equation, and the frequency of T c is shown in Equation 4:…”

Section: Operation Risk and Tension Loss Assessmentmentioning

confidence: 99%

“…The emissivity and absorptivity are fixed at 0.5. According to the above parameters, the ampacity of 416450 groups can be calculated by Equation (2). The scatter diagram is shown in Figure 5, which shows that the distribution of ampacity has obvious seasonality.…”

Section: Quasi-dynamic Thermal Ratingmentioning

confidence: 99%

“…In view of the challenges of new energy generation, load growth and obsolete distribution facilities, it is imperative to improve the utilization of transmission line capacity [1]. However, due to the scarcity of space and land, there is great difficulty in building new transmission corridors [2]. Therefore, it is particularly important to accurately evaluate the maximum allowable ampacity and tap the transmission potential of existing lines to make full use of power grid resources [3].…”

Section: Introductionmentioning

confidence: 99%

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Increasing the Utilization of Transmission Lines Capacity by Quasi-Dynamic Thermal Ratings

et al. 2019

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The power grid is under pressure to maintain a reliable supply because of constrained budgets and environmental policies. In order to effectively make use of existing transmission lines, it is important to accurately evaluate the line capacity. Dynamic thermal rating (DTR) offers a way to increase the utilization of capacity under real-time meteorological data. However, DTR relies on a number of sensors and the cost is high. Therefore, a method of improving the utilization of capacity by quasi-dynamic thermal rating (QDR) is proposed in this paper. QDR at different confidence levels and time scales is determined through the statistical analysis of line ampacity driven by key parameters, and the key parameters is identified by control variate method. In addition, the operation risk and tension loss is evaluated. The results show that QDR can increase the utilization of line capacity and in the absence of along-line measuring devices, QDR is more accurate, reliable and cost-saving. The managers can determine the appropriate confidence level according to the operation risk and tension loss that the system can bear, and shorten the time scale with the permission of the operation and control complexity.

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Section: Operation Risk and Tension Loss Assessmentmentioning

confidence: 99%

Section: Quasi-dynamic Thermal Ratingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Increasing the Utilization of Transmission Lines Capacity by Quasi-Dynamic Thermal Ratings

et al. 2019

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“…In [13] the wide range of real-time line monitoring devices which can be used to determine the DTR of an overhead transmission line in normal or contingency operation is discussed. In [14], considering the growth in RES installation, DTR is investigated as a way to connect the new intermittent generation, expanding the possibility to increase the rating of non-thermally limited lines (long lines). Regarding the L-GIS method, the geographic component together with the availability of information on a detailed geographical scale up to the urban level is undoubtedly an important element for the TSOs.…”

Section: Introductionmentioning

confidence: 99%

Methodologies for the Exploitation of Existing Energy Corridors. GIS Analysis and DTR Applications

et al. 2018

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Abstract:The exploitation of power lines currently in operation has now become a common practice among electric system operators. The construction of new power lines requires taking economic, political and social problems into consideration. This paper considers two methodologies adopted by the Italian Transmission System Operator (TSO), Terna S.p.A.: Dynamic Thermal Rating (DTR) and Laser Imaging Detection and Ranging-Geographic Information System (L-GIS). DTR systems dynamically calculate the real transport capacity of a power line. The L-GIS system allows, after the geo-referencing of the power line, the management of any interference between the line and the nearby obstacles, permitting the optimization of the high voltage line operation. In this paper, after a brief illustration of the two methods, the authors report the results of some applications in the Sicilian electrical power High Voltage (HV) system.

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“…The STR has the advantages in easy calculation and utilization, but the STR is also obvious conservative which is not conductive to wind power accommodation. To exploit the transfer capability of WPIOLs, the dynamic thermal rating (DTR) technique, which calculates the thermal ratings of transmission lines based on the measured meteorological data (including ambient temperature, wind speed & direction, and solar insolation) [10,11], has been applied on WPIOLs. As reported in [12][13][14][15][16], DTR can provide a much larger thermal rating than STR in most cases, thus significantly benefitting wind power accommodation.…”

mentioning

confidence: 99%

A Thermal Rating Calculation Approach for Wind Power Grid-Integrated Overhead Lines

Wang

Huang³

et al. 2018

Energies

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Currently, the rapid increase in wind power integration in power systems is resulting in an increasing power flow in the grid-integrated power transmission lines of wind farms. The wind power curtailment caused by the current limits (thermal ratings) of the wind power integration overhead lines (WPIOLs) is becoming increasingly common. Aiming at this issue, the influence of conductor heating on the loss of tensile strength (LOTS) and sag of a WPIOL was analyzed in this paper. Then a decision model is proposed for the thermal ratings of WPIOLs, which regards the minimized wind power curtailment as objective and introduces permissible cumulative LOTS and sag of the conductor as constraints. Based on this model, the thermal rating for a WPIOL can be decided to ensure the expected service life of the conductor and safe clearance. In addition, case studies are used to demonstrate that the proposed approach is capable of improving the conservatism of conventional thermal rating calculation and reducing the wind power curtailment by improving the utilization efficiency of WPIOLs.

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Applicability of Dynamic Thermal Line Rating for Long Lines

Cited by 34 publications

References 19 publications

Increasing the Utilization of Transmission Lines Capacity by Quasi-Dynamic Thermal Ratings

Increasing the Utilization of Transmission Lines Capacity by Quasi-Dynamic Thermal Ratings

Methodologies for the Exploitation of Existing Energy Corridors. GIS Analysis and DTR Applications

A Thermal Rating Calculation Approach for Wind Power Grid-Integrated Overhead Lines

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