Performance of Insulators for Direct Current Transmisson Line Under Polluted Condition

Kimoto, I.; Fujimura, T.; Naito, K.

doi:10.1109/tpas.1973.293660

Cited by 44 publications

(9 citation statements)

References 7 publications

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“…It is recognized that saline deposition and diffusion are affected by various natural processes such as temperature exposure, relatively humidity or moisture level, counter-diffusion of hydroxide ions and environmental load of salts and other adverse weather conditions. Types of contamination deposition on the insulator surface influence surface flashover, which has been extensively studied by several researchers [3][4][5][6][7][8]. The use of non-ceramic insulators increased significantly in last five decades.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Saline Deposition and Surface Flashover on High-Voltage Insulators near Shoreline: Mathematical Models and Experimental Validations

2019

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This paper deals with sea salt transportation and deposition mechanisms and discusses the serious issue of degradation of outdoor insulators resulting from various environmental stresses and severe saline contaminant accumulation near the shoreline. The deterioration rate of outdoor insulators near the shoreline depends on the concentration of saline in the atmosphere, the influence of wind speed on the production of saline water droplets, moisture diffusion and saline penetration on the insulator surface. This paper consists of three parts: first a model of saline transportation and deposition, as well as saline penetration and moisture diffusion on outdoor insulators, is presented; second, dry-band initiation and formation modelling and characterization under various types of contamination distribution are proposed; finally, modelling of dry-band arcing validated by experimental investigation was carried out. The tests were performed on a rectangular surface of silicone rubber specimens (12 cm × 4 cm × 8 cm). The visualization of the dry-band formation and arcing was performed by an infrared camera. The experimental results show that the surface strength and arc length mainly depend upon the leakage distance and contamination distribution. Therefore, the model can be used to investigate insulator flashover near coastal areas and for mitigating saline flashover incidents.

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Section: Introductionmentioning

confidence: 99%

Mechanism of Saline Deposition and Surface Flashover on High-Voltage Insulators near Shoreline: Mathematical Models and Experimental Validations

2019

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“…It is stated that the bigger the diameter, the lower the pollution flashover voltage with the other dimensions and test conditions are identical [3,11]. This is because that the increasing of diameter can enlarge the polluted area of insulator, resulting in the decrease of the contaminated layer resistance and the decrease of the flashover voltage [12].…”

Section: Effect Of Diametermentioning

confidence: 99%

Effect of Shed Configuration on AC Flashover Performance of Polluted Porcelain Insulators

Li¹,

Zhang²,

Yang³

et al. 2016

Proceedings of the 2015 2nd International Forum on Electrical Engineering and Automation (IFEEA 2015)

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“…Large numbers of upcoming HVDC projects motivate us to enhance the technical knowledge towards the behavior of HVDC insulators, as failure rate is observed to be more under DC excitation [12][13][14]. [15][16][17][18].…”

Section: Insulator's Under Investigationmentioning

confidence: 99%

Pollution performance of HVDC insulator strings under normal and faulted conditions

Reddy

Verma

2014

2014 6th IEEE Power India International Conference (PIICON)

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HVDC transmission is becoming increasingly viable to EHVAC transmission system, since it can carry huge amount of power compared to same voltage levels as of HVAC. HVDC transmission is more economical when the power is to be transferred over the long distances, but the major problem is the failure of overhead transmission line insulator due to the pollution/contaminated conditions. This failure rate is observed to be higher as compared to the AC systems. This paper presents the simulation and experimental studies which are carried out on different types of newly developed HVDC insulators (± 500 kV and ± 800 kV system voltage) under different conditions such as normal, string containing faulty discs at arbitrary locations and under polluted/ contaminated conditions of different severity (medium and high pollution conductivity respectively). The results of the present investigation are analyzed and presented.

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Performance of Insulators for Direct Current Transmisson Line Under Polluted Condition

Cited by 44 publications

References 7 publications

Mechanism of Saline Deposition and Surface Flashover on High-Voltage Insulators near Shoreline: Mathematical Models and Experimental Validations

Mechanism of Saline Deposition and Surface Flashover on High-Voltage Insulators near Shoreline: Mathematical Models and Experimental Validations

Effect of Shed Configuration on AC Flashover Performance of Polluted Porcelain Insulators

Pollution performance of HVDC insulator strings under normal and faulted conditions

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