Line Insulation Design for APS 500-ky System

Hileman, A. R.; Guyker, W. C.; Smith, H. M.; Grosser, George E.

doi:10.1109/tpas.1967.291923

Cited by 11 publications

(4 citation statements)

References 11 publications

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“…In the past decades, many studies have been carried out on the discharge characteristics of long air gaps. In the 1960s, scholars from the Soviet Union and the United States carried out the research on the air gap discharge characteristics under switching impulse, to obtain the discharge characteristics of different air gap structures through a large number of experiments and establish the empirical calculation formula of the discharge voltage [3][4][5]. Since the 1970s, Chinese scholars have carried out many experiments on the air gap discharge characteristics of transmission projects, providing a basis for extrahigh and ultrahigh voltage (EHV and UHV) transmission projects [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Switching impulse discharge characteristics of UHV transmission line air gaps

Gao

Wang

Zhang

et al. 2019

IEEJ Transactions Elec Engng

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The design of external insulation for transmission lines is usually based on real-type experiments. With the increasing voltage level of the transmission lines, in order to better design the experiments and reduce the experiment workload in the future, this paper studies the switching impulse discharge characteristics of air gaps of an ultrahigh-voltage (UHV) transmission line. A long air gap switching impulse breakdown voltage prediction method based on the leader discharge mechanism is proposed in this paper, and a continuous leader inception model is fitted for the air gaps in UHV transmission lines by calculating the factor R of the conductor-plane gaps. The method and the model can effectively predict the air gap breakdown voltage of transmission lines. The influence of tower width and conductor structure on air gap breakdown characteristics of UHV transmission lines is studied by the method and the model proposed this paper. The results show that, as the width of the tower increases, the breakdown voltage decreases, and as the gap length increases, the influence of the tower width on the breakdown voltage decreases. The conductor structure has no obvious influence on the discharge characteristics of transmission line air gaps.

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Section: Introductionmentioning

confidence: 99%

Switching impulse discharge characteristics of UHV transmission line air gaps

Gao

Wang

Zhang

et al. 2019

IEEJ Transactions Elec Engng

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“…When the streamer ahead of the leader reaches the ground potential electrode, the discharge goes into the final jump, as shown in Figure 1. of tests, and established several empirical formulas for calculating the discharge voltage [3][4][5]. Since the 1970s, some scholars have carried out tests on the discharge characteristics of power transmission and transformation projects to provide a basis for Extra High Voltage (EHV) and UHV transmission projects [6][7][8].…”

Section: Long Air Gap Discharge Modelmentioning

confidence: 99%

“…In past decades, scholars have carried out a lot of research on long air gap discharge characteristics. In the 1960s, some scholars studied the discharge characteristics under switching impulse, obtained the breakdown characteristics of different gap structures through a large number of tests, and established several empirical formulas for calculating the discharge voltage [3][4][5]. Since the 2 of 12 1970s, some scholars have carried out tests on the discharge characteristics of power transmission and transformation projects to provide a basis for Extra High Voltage (EHV) and UHV transmission projects [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Positive Switching Impulse Discharge of UHV Transmission Line Air Gaps

et al. 2018

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Positive switching impulse discharge characteristics are an important basis for the external insulation design of transmission line towers. At present, the characteristics are obtained mainly by real tower discharge tests. Since the existing research on the discharge model is not perfect, test designs are not reasonable, which results in high costs. The influence of line height and tower width on the discharge characteristics of Ultra High Voltage (UHV) transmission lines air gaps is studied in this paper. The results show that the line height had little influence on the breakdown voltage of air gaps in UHV transmission lines. A tower-width discharge model was obtained by fitting the breakdown voltage of air gaps with different gap lengths and tower widths. By analyzing the gap characteristic factors of different transmission lines, a discharge model of different tower air gaps in UHV transmission lines was presented. The breakdown voltage calculated by the models was in good agreement with the test results, and the errors were not more than 5%.

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“…Since air gaps are the main external insulation of power transmission and transformation projects, their dielectric strength is the important basis for the determination of gap distances in engineering applications. In the past decades, a large number of discharge tests of long air gaps have been carried out to obtain the dielectric strength of different types of air gaps [1–5]. In addition, the physical process of discharge development has also been revealed by using discharge observation techniques [6–10].…”

Section: Introductionmentioning

confidence: 99%