Insulation Coordination of UHVDC Transmission Line

2017 ◽  
pp. 959-987
Author(s):  
Jidong Shi ◽  
Hao Zhou ◽  
Xu Deng
Keyword(s):  
Transmission Line ◽  
Insulation Coordination

Impact of 750kV Transmission Line Series Compensation Capacity on Power Frequency Overvoltage

2014 ◽  
Vol 986-987 ◽  
pp. 330-333
Author(s):  
Ding Jun Wen ◽  
Xiu Bin Zhang ◽  
Hong Gang Chen ◽  
Feng Jiang ◽  
Ya Ming Sun
Keyword(s):  
Transmission Line ◽  
Single Phase ◽  
Power Transmission ◽  
Series Compensation ◽  
Two Phase ◽  
Transient Model ◽  
Power Frequency ◽  
Arc Current ◽  
Recovery Voltage ◽  
Insulation Coordination

The overvoltage calculation of 750kV transmission line with series compensation has great significance on the design, insulation coordination and protection of the line. In this paper, a transient model of 750kV power transmission system with series compensation is established. Effects of different capacity on no-load capacitive rise overvoltage, single-phase grounding overvoltage, two-phase grounding overvoltage are calculated. Secondary arc current and recovery voltage of different series compensation capacity in single-phase grounding is also calculated.

scholarly journals Modelling 132 kV Substation for Surge Arrester Studies

2008 ◽  
Vol 9 (5) ◽  
Author(s):  
Mohd Zainal Abidin Ab Kadir ◽  
Hatta Mohamed Ariff ◽  
Aida Maria Azmi
Keyword(s):  
Cost Effectiveness ◽  
Power System ◽  
Transmission Line ◽  
Transient Analysis ◽  
Single Phase ◽  
Layout Design ◽  
Phase Line ◽  
Surge Arresters ◽  
Damage Modelling ◽  
Insulation Coordination

Insulation coordination models are an essential part of power system studies and are used to determine the performance of a transmission line or substation. This paper generalizes the guidelines and parameters to be used in modelling the substation and in performing the analysis on the prediction of the transformer damage. Modelling parameters and the substation layout design are based and adapted from 132/11 kV Simpang Renggam – Ayer Hitam substation in Johor Baharu, Malaysia, courtesy of the Tenaga Nasional Berhad (TNB). The model is based on the single phase line model, as was suggested by the IEEE, to be adequate to represent the substation in transient analysis simulation. Extensive analyses on the placement of the surge arresters at the substation and a prediction of the transformer damage are also presented. The results obtained from this analysis are then compared with the suggested Basic Lightning Insulation Level (BIL) by the TNB, according to the standards, for assessing the percentage of transformer damage and optimizing the substation performance in terms of its reliability and cost effectiveness.

scholarly journals PROFIL SURJA HUBUNG KARENA PROSES ENERGIZED (PEMBERIAN TENAGA) PADA SALURAN TRANSMISI 500 KV

2010 ◽  
Vol 16 (1) ◽  
pp. 31
Author(s):  
Yuniarto Yuniarto
Keyword(s):  
Transmission Line ◽  
Electromagnetic Transients ◽  
Process Data ◽  
Coordination System ◽  
Insulation Coordination ◽  
Research Show

Yuniarto, in this paper explain that transient over voltage that happened because switching surge have tobe paid attention to don't cause the damage equipments of insulation coordination system. This research aim toperceive the transient over voltage at the end of 500 kv transmission line caused energized process by using EMTP(Electromagnetic Transients Program) as toll to simulate the energized process. Data for this research was takenfrom 500 kv transmission line Ungaran-Pedan. From this research was expected can become a reference for powercompany in planning insulation coordination at transmission line.Result of research show that transient over voltage at the end of 500 kv transmission line caused energizedprocess reach more or less twice its nominal voltageKey word : energized, karateristik, transient over voltage, EMTP

scholarly journals Assessment of Overvoltage and Insulation Coordination in Mixed HVDC Transmission Lines Exposed to Lightning Strikes

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4217
Author(s):  
Mansoor Asif ◽  
Ho-Yun Lee ◽  
Kyu-Hoon Park ◽  
Ayesha Shakeel ◽  
Bang-Wook Lee
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Protective Level ◽  
Lightning Strikes ◽  
Hvdc Transmission ◽  
Surge Arresters ◽  
Hvdc Transmission Lines ◽  
Lightning Impulse ◽  
Insulation Coordination ◽  
Front Model

Many geographical constraints and aesthetic concerns necessitate the partial use of cable sections in the High Voltage DC (HVDC) transmission line, resulting in a mixed transmission line. The overhead sections of mixed lines are exposed to lightning strikes. The lightning strikes can not only result in flashover of overhead line (OHL) insulators but can enter the cable and permanently damage its insulation if adequate insulation coordination measures are not taken. In this work, we have analyzed the factors that affect the level of overvoltage inside the cable by simulating a fast front model in PSCAD. It has been determined that surge arresters must be provided at cable terminals when the length of cable sections is less than 16 km to limit the core-ground overvoltage within the lightning impulse protective level (LIPL). The level of sheath-ground overvoltage is independent of the length of cable; however, it can be limited within LIPL by lowering the sheath grounding impedance to 1.2 Ω. Insulation coordination measures do not impact the likelihood of OHL insulators’ flashover. The flashover performance of OHL can be improved by lowering the footing impedance of the second tower closest to the cable terminals, which is otherwise most likely to flashover.

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