A hybrid electric field calculation method for UHVAC and UHVDC transmission lines parallel adjacent erection
A hybrid electric field calculation method for UHVAC and UHVDC transmission lines parallel adjacent erection
- Author(s): S. Zhang 1 ; D. Yao 2 ; F. Li 3 ; B. Tang 3
- DOI: 10.1049/icp.2020.0261
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- Author(s): S. Zhang 1 ; D. Yao 2 ; F. Li 3 ; B. Tang 3
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View affiliations
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Affiliations:
1:
State Grid Henan Electric Power Research Institute , Zhengzhou , China ;
2: State Grid Henan Electric Power Research Institute , Zhengzhou , China ;
3: College of Electrical Engineering and New Energy , China Three Gorges University , Yichang , China
Source:
The 16th IET International Conference on AC and DC Power Transmission (ACDC 2020),
2021
p.
1677 – 1682
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Affiliations:
1:
State Grid Henan Electric Power Research Institute , Zhengzhou , China ;
- Conference: The 16th IET International Conference on AC and DC Power Transmission (ACDC 2020)
- DOI: 10.1049/icp.2020.0261
- ISBN: 978-1-83953-330-3
- Location: Online Conference
- Conference date: 02-03 July 2020
- Format: PDF
UHVAC and UHVDC transmission lines erect in the same corridors can solve the problem of insufficient transmission corridors in China, but it is difficult to solve the hybrid electric field under UHVAC and UHVDC transmission lines in the same corridors accurately and efficiently with existing algorithms. This paper proposes an algorithm based on the Deutsch assumption that an ac conductor at any time can be regarded as a dc conductor whose voltage value is the instantaneous value of ac voltage, thus simplifying the ac and dc transmission line parallel adjacent erection problem to a multi-loop dc transmission line problem. At the same time, the dc offset charge parameters and ac ripple charge parameters are introduced to improve the calculation accuracy, because It reflects the distribution law of ground electric field in practical UHVAC and UHVDC transmission lines in the same corridors. Take a transmission lines of ±800kV dc and 1000kV ac in the same corridor as an example, and compare the algorithm value with the measured value. The results show that the average error between the algorithm value and the measured value is only 7.2%, which verifies the effectiveness of the method.
Inspec keywords: HVDC power transmission; power transmission lines; conductors (electric); electric fields
Subjects: a.c. transmission; d.c. transmission; Power transmission lines and cables