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Study on the Power-Frequency Waves Distribution Characteristics for Half-Wavelength Transmission Lines Based on the Frequency-Length Factor
المؤلفون المشاركون
Chen, Chang
Ma, Xiaoyang
Yang, Honggeng
Wang, Weikang
Liu, Yilu
المصدر
Mathematical Problems in Engineering
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-14، 14ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-02-27
دولة النشر
مصر
عدد الصفحات
14
التخصصات الرئيسية
الملخص 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.
نمط استشهاد جمعية علماء النفس الأمريكية (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
نمط استشهاد الجمعية الأمريكية للغات الحديثة (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
نمط استشهاد الجمعية الطبية الأمريكية (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
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1194434
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