Providing the Pollution Map in South West Provinces of Iran Based on DDG Method

Shariati, Mohammad Reza; Moradian, Ali; Rezaei, M.; Vaseai, S.J.A.

doi:10.1109/tdc.2005.1547144

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…It is important to highlight that there are many guides to help to assess the site pollution severity of any service environment even if they are not standardized solutions in the IEC. Such not standardized procedures have been used in countries such as Iran (by the Niroo Research Institute) [28] and China (by the State Grid and Southern China Power Grid) [29].…”

Section: Introductionmentioning

confidence: 99%

On the Chemical Composition and Hygroscopicity of Aerosols Deposited on the Insulators of Italian Power Lines

Gini,

Balzarini,

Pirovano

et al. 2023

Applied Sciences

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The reliability of the national power grid is a key issue in modern society. Atmospheric aerosols are the main cause of the reduction in the performance of insulators and the increase in the possibility of flashovers, resulting in power line failures. Under high ambient humidity, the water-soluble compounds of atmospheric aerosols collected on the insulators’ surface can dissociate in ions and form a conductive layer, which may lead to flashover events. With a view to investigating the processes that drive these phenomena, the chemical composition of aerosol deposits on insulators in Italy was determined by ion chromatography analysis and thermos-optical and X-ray techniques. In addition, a synthetic aerosol with the same analyzed chemical composition was generated in a laboratory and deposited on PTFE filters and glass specimens allowing us to determine the deliquescence and crystallization relative humidity and the conductive effect in an aerosol exposure chamber. The results evidenced the presence of a hazardous inorganic ion layer, which generates a sharp phase transition of the aerosol deposit as a function of the ambient relative humidity; this layer poses a dangerous threat to the reliability of the power grid, increasing the probability of flashover events where the conductive layer facilitates the flow of electrical current across the insulator surface, potentially causing power outages or damage to the power lines.

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Section: Introductionmentioning

confidence: 99%

On the Chemical Composition and Hygroscopicity of Aerosols Deposited on the Insulators of Italian Power Lines

Gini,

Balzarini,

Pirovano

et al. 2023

Applied Sciences

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“…Many scholars have conducted in-depth researches on insulator contamination [6][7][8][9], and analyzed the impact of insulator contamination on contamination flashover. Shariati et al [10] studied the contamination flashover characteristics of insulators, and in their study, when the insulator surface was wet due to rain or fog, the contamination deposits would accumulate on the insulator surface and became a conductive path, eventually leading to flashover. Yang Zhongyi et al [11] studied the effect of the chemical composition of contamination on the flashover performance of insulators made of different materials.…”

Section: Introductionmentioning

confidence: 99%

Study on the Contamination Characteristics of V-Type Double Suspension Rod Insulators Based on the Influence of Wake Flow

et al. 2022

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The insulators of the catenary of the Lanzhou-Xinjiang High-speed Railway in windy areas suffer from serious contamination, which has led to frequent flashover accidents. The catenary of the Lanzhou-Xinjiang High-speed Railway has adopted the unique external insulation of V-type double suspension rod insulators. To further determine the contamination characteristics of this type of insulator, a contamination simulation model of insulator is established in this paper based on the principles of fluid mechanics, which is used to analyze the contamination characteristics of the V-type double suspension rod insulators under the influence of wake flow. The research results show that wind speed directly determines the static pressure on the surface of the insulator, the wind speed and particle concentration are proportional to the contamination volumes on the windward and crosswind sides of insulator, while the particle size is inversely proportional to the contamination volume on the leeward side of the insulator. The direction of wake flow is consistent with the direction angle of external incoming flow, and the wake flow generating area affects the contamination characteristics of the insulator. When the incoming flow is at a prevailing wind direction of 0°, focus should be put on the windward and crosswind sides of the two insulators during insulator cleaning, and the contamination distributions on these two insulators are similar; when the incoming flow is at a prevailing wind elevation of 0∘∼60∘, focus should be put on the entire surface of 1# insulator and the windward and crosswind sides of 2# insulator during insulator cleaning.

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Atmospheric Corrosion Rates of Copper, Galvanized Steel, Carbon Steel and Aluminum in the Metropolitan Region of Salvador, BA, Northeast Brazil

Portella

Pereira

et al. 2012

Procedia Engineering

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Providing the Pollution Map in South West Provinces of Iran Based on DDG Method

Cited by 5 publications

References 1 publication

On the Chemical Composition and Hygroscopicity of Aerosols Deposited on the Insulators of Italian Power Lines

On the Chemical Composition and Hygroscopicity of Aerosols Deposited on the Insulators of Italian Power Lines

Study on the Contamination Characteristics of V-Type Double Suspension Rod Insulators Based on the Influence of Wake Flow

Atmospheric Corrosion Rates of Copper, Galvanized Steel, Carbon Steel and Aluminum in the Metropolitan Region of Salvador, BA, Northeast Brazil

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