Journal ArticleDOI
Natural Pollution Test of Insulators Energized with DC High Voltage
Taisuke Seta,N. Arai,T. Udo +2 more
TLDR
In this paper, various types of insulators have been energized with ±250 kV dc voltage and exposed to natural conditions by the seaside continuously for about two years, and the influence of dc voltage application on the salt deposit density was not so notable as expected, while the effect of insulator types on the voltage withstand strength was greater than anticipated.Abstract:
Various types of insulators have been energized with ±250 kV dc voltage and exposed to natural conditions by the seaside continuously. Salt deposit density and flashover phenomenon of these insulators have been investigated extensively for about two years. According to the results obtained so far, the influence of dc voltage application on the salt deposit density was not so notable as expected, while the effect of insulator types on the voltage withstand strength was greater than anticipated.read more
Citations
More filters
Journal ArticleDOI
Aging of silicone rubber-based composite insulators under multi-stressed conditions: an overview
Journal ArticleDOI
Natural contamination test of insulators with DC voltage energization at inland areas
K. Takasu,T. Shindo,N. Arai +2 more
TL;DR: In this article, the results of tests for natural contamination of insulator strings in inland areas are discussed and the application of these results to insulation design for HVDC transmission lines is discussed.
Journal ArticleDOI
Pressure Dependence of DC Breakdown of Contaminated Insulators
TL;DR: In this paper, the effect of pressure on dc breakdown voltage of contaminated porcelain insulators and glass models was investigated in the range of 13 to 100 kPa, and it was shown that flashover voltage decreases nonlinearly with lowering of pressure.
Journal ArticleDOI
Mechanism of saline deposition and surface flashover on outdoor insulators near coastal areas part II: Impact of various environment stresses
TL;DR: In this article, the degradation rate of outdoor insulators near the shoreline depends on the concentration of saline in the atmosphere, influence of wind speed on the production of saline water droplets, moisture diffusion and saline penetration on the insulator surface.
Journal ArticleDOI
Studies on Performance of Contaminated Insulators Energized with DC Voltage
TL;DR: In this paper, several types of insulators with a variety of contaminants and test methods were tested using dc voltages and a thyristor controlled dc power source provided a sufficiently stiff source for dc contamination testing, and the dc performance was influenced by the contamination degree both for soluble and insoluble materials, contamination uniformity, insulator shape and relationship of total leakage distance to insulator diameter.
References
More filters
Journal ArticleDOI
Performance of Insulators for Direct Current Transmisson Line Under Polluted Condition
TL;DR: In this article, the performance of suspension type insulators for HVDC transmission line under polluted condition is investigated, where shed profile plays a big role in determining DC withstand voltage value.
Journal ArticleDOI
Insulation Requirements, Corona Losses, and Corona Radio Interference for High-Voltage D-C Lines
Journal ArticleDOI
BPA's Extra High Voltage DC Tests: II - Outdoor Flashover
TL;DR: In this paper, a linear function of specimen length for either polarity or for either wet or dry test conditions was used to determine the dc flashover characteristics of rod gaps, line-to-tower air gaps, and suspension insulator assemblies.
Journal ArticleDOI
BPA's Extra High Voltage DC Tests: I - Contaminated Insulators
TL;DR: In this paper, the dc flashover characteristics of clean, artificially, and naturally contaminated transmission line suspension insulators were evaluated in the fog chamber and compared with clean-wet and contaminated insulators.