Investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distribution
Sag calculation plays an important role in overhead line design. Since the tensile stress of aluminium conductor steel reinforced (ACSR) is required for the sag calculation, an analysis on sag behaviour when considering the tensile stress distribution can be very useful to improve the accuracy of sa...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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The Royal Society
2021-08-01
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| Series: | Royal Society Open Science |
| Subjects: | |
| Online Access: | https://royalsocietypublishing.org/doi/10.1098/rsos.210049 |
| _version_ | 1818443703769890816 |
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| author | Deming Guo Pengyu Wang Wencheng Zheng Yang Li Junwen Li Wenhu Tang Liang Shi Gang Liu |
| author_facet | Deming Guo Pengyu Wang Wencheng Zheng Yang Li Junwen Li Wenhu Tang Liang Shi Gang Liu |
| author_sort | Deming Guo |
| collection | DOAJ |
| description | Sag calculation plays an important role in overhead line design. Since the tensile stress of aluminium conductor steel reinforced (ACSR) is required for the sag calculation, an analysis on sag behaviour when considering the tensile stress distribution can be very useful to improve the accuracy of sag results. First, this paper analyses the ACSR tensile stress distribution arising from the temperature maldistribution through proposing a new calculation formula. A finite-element analysis (FEA) model of ACSR is conducted for the solution of the new formula. By using the results, the error and limitations of the existing sag calculation methods for ACSR are discussed. As the critical point of sag calculation, knee-point temperature is solved iteratively involving the tensile stress maldistribution phenomenon in aluminium wires. Based on this iterative solution, an improved analytical method for the ACSR sag calculation considering the creep effect is presented and also compared with the hybrid sag method. The results show that these two methods are basically coincident without the consideration of creep effect, while there are non-negligible differences between them as the creep strain is involved. Compared with the existing analytical methods, the improved sag calculation method proposed in this paper can be applied in more extensive situations. |
| first_indexed | 2024-12-14T19:04:16Z |
| format | Article |
| id | doaj.art-3dfa40eba61b4cb786f8976d05235645 |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-12-14T19:04:16Z |
| publishDate | 2021-08-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-3dfa40eba61b4cb786f8976d052356452022-12-21T22:50:54ZengThe Royal SocietyRoyal Society Open Science2054-57032021-08-018810.1098/rsos.210049Investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distributionDeming Guo0Pengyu Wang1Wencheng Zheng2Yang Li3Junwen Li4Wenhu Tang5Liang Shi6Gang Liu7School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, People's Republic of ChinaSchool of Electric Power Engineering, South China University of Technology, Guangzhou 510641, People's Republic of ChinaSchool of Electric Power Engineering, South China University of Technology, Guangzhou 510641, People's Republic of ChinaState Grid Shijiazhuang Electric Power Supply Company, Shijiazhuang 050000, People's Republic of ChinaSchool of Electric Power Engineering, South China University of Technology, Guangzhou 510641, People's Republic of ChinaSchool of Electric Power Engineering, South China University of Technology, Guangzhou 510641, People's Republic of ChinaGuangdong Hydropower Planning and Design Institute Co., Ltd, Guangzhou 510635, People's Republic of ChinaSchool of Electric Power Engineering, South China University of Technology, Guangzhou 510641, People's Republic of ChinaSag calculation plays an important role in overhead line design. Since the tensile stress of aluminium conductor steel reinforced (ACSR) is required for the sag calculation, an analysis on sag behaviour when considering the tensile stress distribution can be very useful to improve the accuracy of sag results. First, this paper analyses the ACSR tensile stress distribution arising from the temperature maldistribution through proposing a new calculation formula. A finite-element analysis (FEA) model of ACSR is conducted for the solution of the new formula. By using the results, the error and limitations of the existing sag calculation methods for ACSR are discussed. As the critical point of sag calculation, knee-point temperature is solved iteratively involving the tensile stress maldistribution phenomenon in aluminium wires. Based on this iterative solution, an improved analytical method for the ACSR sag calculation considering the creep effect is presented and also compared with the hybrid sag method. The results show that these two methods are basically coincident without the consideration of creep effect, while there are non-negligible differences between them as the creep strain is involved. Compared with the existing analytical methods, the improved sag calculation method proposed in this paper can be applied in more extensive situations.https://royalsocietypublishing.org/doi/10.1098/rsos.210049aluminium conductor steel reinforcedsag calculationforced convectiontensile stress distributioncreep effectknee-point temperature |
| spellingShingle | Deming Guo Pengyu Wang Wencheng Zheng Yang Li Junwen Li Wenhu Tang Liang Shi Gang Liu Investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distribution Royal Society Open Science aluminium conductor steel reinforced sag calculation forced convection tensile stress distribution creep effect knee-point temperature |
| title | Investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distribution |
| title_full | Investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distribution |
| title_fullStr | Investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distribution |
| title_full_unstemmed | Investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distribution |
| title_short | Investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distribution |
| title_sort | investigation of sag behaviour for aluminium conductor steel reinforced considering tensile stress distribution |
| topic | aluminium conductor steel reinforced sag calculation forced convection tensile stress distribution creep effect knee-point temperature |
| url | https://royalsocietypublishing.org/doi/10.1098/rsos.210049 |
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