Study on the Power-Frequency Waves Distribution Characteristics for Half-Wavelength Transmission Lines Based on the Frequency-Length Factor
Joint Authors
Chen, Chang
Ma, Xiaoyang
Yang, Honggeng
Wang, Weikang
Liu, Yilu
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-27
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
To analyze the distribution characteristics of voltage and current along half-wavelength transmission lines (HWTLs) in the cases with or without short circuit in the steady state, the method based on the frequency-length factor (FLF) for lossy lines is proposed.
Firstly, according to the pole condition of the FLF, the distribution characteristics of power-frequency waves along HWTLs are analyzed.
Then, the comprehensive effects of the system parameters and fault resistance are explored, revealing the mechanism of the power-frequency resonance caused by nonmetallic short circuit.
Meanwhile, unbalanced short-circuit fault is studied by exploiting additional impedance.
The results show that the distribution of the maximum value of power-frequency resonance voltage is related to the system parameters but not to the fault impedance.
When a HWTL is short circuited at 2640 km∼2930 km, the resonance voltage can reach to 21 p.u.
In relation to symmetrical short circuit, the resonance voltage appears at 1469 km from the short-circuit point, while the position moves towards the short-circuit point with the increase of additional impedance in asymmetrical short-circuit conditions.
Additionally, the model theoretically proves that the power-frequency overvoltage induced by short circuit does not appear on a line whose length is less than 1469 km.
Finally, cases are studied on PSCAD to verify the accuracy of the model.
American Psychological Association (APA)
Chen, Chang& Ma, Xiaoyang& Yang, Honggeng& Wang, Weikang& Liu, Yilu. 2020. Study on the Power-Frequency Waves Distribution Characteristics for Half-Wavelength Transmission Lines Based on the Frequency-Length Factor. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1194434
Modern Language Association (MLA)
Chen, Chang…[et al.]. Study on the Power-Frequency Waves Distribution Characteristics for Half-Wavelength Transmission Lines Based on the Frequency-Length Factor. Mathematical Problems in Engineering No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1194434
American Medical Association (AMA)
Chen, Chang& Ma, Xiaoyang& Yang, Honggeng& Wang, Weikang& Liu, Yilu. Study on the Power-Frequency Waves Distribution Characteristics for Half-Wavelength Transmission Lines Based on the Frequency-Length Factor. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1194434
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194434