Experimental techniques to simulate naturally polluted high voltage transmission line insulators

Gouda, Osama E.; Dein, Adel Z. El

doi:10.1109/tdei.2014.004064

Cited by 13 publications

(7 citation statements)

References 15 publications

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“…On the other hand, they hardly would be sedimented on the insulator surface. Therefore, a mix of (SPm) and salty dust, originated from MIGHAN Salt Lake and its surrounding desert, which is located 5 km northeast of the biggest city of the province, identified as the dominant air pollutant for the district under study [14], [15]. Consequently, a sample from the aforementioned mixture was gathered to be used as a substance for artificial pollution tests.…”

Section: Climate Evaluation and Determining The Dominant Air Pollution Constituentmentioning

confidence: 99%

Laboratory investigation of the impact of air pollution on partial discharge inception voltage of insulators in a specific region

Shafiei

Faghihi

Heydari

et al. 2021

IJECE

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<span lang="EN-US">Studying the discharge characteristics of transmission line insulators in the presence of pollution, particularly when the contaminated layer is wet by rain, fog or condensation, is necessary for selecting the proper insulation. Therefore, identifying the major air pollutants as well as the most effective ones on the discharge performance of outdoor insulators is mandatory. A systematic approach has been proposed to evaluate the impact of dominant air pollutants of an area on partial discharge (P.D) inception voltage of specimen insulators. Based on the suggested method, determining the pollution constituents, defining the dominant pollutant of the area, finding the most commonly used insulators for medium and above distribution voltages within the geographical boundaries of the Central Province of Iran, as well as examining the effect of dominant air pollutant of the region on partial discharge inception voltage of designated insulators by laboratory measurements, are the necessary steps toward a comprehensive study of the subject.</span>

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Section: Climate Evaluation and Determining The Dominant Air Pollution Constituentmentioning

confidence: 99%

Laboratory investigation of the impact of air pollution on partial discharge inception voltage of insulators in a specific region

Shafiei

Faghihi

Heydari

et al. 2021

IJECE

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“…Because of certain influencing factors and constraints, it is difficult to choose a common form of insulation with satisfactory performance. For instance, the insulation capacity can be reduced if an insulating chain is exposed to polluted environments and then subjected to high humidity [1]. This initially leads to electric discharges where their severity and rate may increase, generating a complete line-to-ground discharge called ``bypass or flashover" [2].…”

Section: Introductionmentioning

confidence: 99%

Features Characterizing the Surface State of HV Insulator Glass Model under Desert Pollution

Maadjoudj

Kherif

Mekhaldi

et al. 2021

IEEE Trans. Dielect. Electr. Insul.

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This paper deals with the monitoring of the surface state of HV insulator model under discontinuous layer of pollution. Natural desert sand is used to simulate the pollution influence in Algerian Sahara regions. Experimental tests are carried out on a glass plane model of 1512L cap-pin insulator largely used in the said regions. Leakage current LC signal is recorded for different positions and widths of the polluted-band. First, the obtained results are discussed to describe the behaviour of insulator model. For each configuration, time-frequency decomposition is established using Discrete Wavelet Transform (DWT) for information extraction corresponding to the flashover process. Decomposition results indicate that the detail D3 is highly correlated with the measured LC signal. Recurrence Plot (RP) technique and Recurrence Quantification Analysis (RQA) are applied to quantify the temporal patterning in LC signal, giving information on the position and width of the polluted-band on the insulating surface. It was found that RQA indicators increase with the polluted-band width according to the position of this polluted-band. Based on the plan model, the findings demonstrate the capability of RQA indicators for the glass insulator monitoring, providing information on the width and position of the polluted-band on its surface.

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“…Previous studies have used lab tests to determine the relationship between the deposit levels of soluble and non-soluble salts [9,10] and leakage currents under predefined working conditions [11,12] to obtain valuable information on the risk of electric arc onset. However, in real applications, a mixture of sediments whose composition varies over time is deposited on the insulator surface [9], which makes it difficult to determine the PLC level and its possible negative consequences on the insulator.…”

Section: Introductionmentioning

confidence: 99%

Novel technique for estimating pollution-associated leakage current in high-voltage insulators based on adaptive filtering in long-term recording

Bueno-Barrachina

Peñuelas

Ye-Lin

et al. 2021

Meas. Sci. Technol.

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Moist polluting substances on high-voltage insulator surfaces can cause power-line failures by triggering electric arcs. There are at present no effective methods of measuring insulator pollution levels during normal operations. In this work, we attempt to estimate insulator pollution leakage current (PLC) as an indirect method of measuring deposits in a 30 month period of simultaneously recording leakage current and related environmental variables in substation insulators. We analyzed the relationship between raw leakage current and environmental variables. We canceled out the influence of relative humidity on leakage current by adaptive filtering and then obtained the PLC by filtering out the anomalous peaks in the recording. The proposed method considerably reduces the correlation between leakage current and relative humidity (0.826 vs 0.019). The resulting signal was only slightly correlated with other environmental variables (<0.03), suggesting that the relationships between leakage current and temperature, wind direction and speed are mainly attributable to their influence on relative humidity. The PLC presents a quasi-annual smooth fluctuation over time with a magnitude similar to those obtained in laboratory tests. This novel technique could be used to monitor insulator PLC in real time and thus improve power supply continuity and reduce maintenance costs.

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Experimental techniques to simulate naturally polluted high voltage transmission line insulators

Cited by 13 publications

References 15 publications

Laboratory investigation of the impact of air pollution on partial discharge inception voltage of insulators in a specific region

Laboratory investigation of the impact of air pollution on partial discharge inception voltage of insulators in a specific region

Features Characterizing the Surface State of HV Insulator Glass Model under Desert Pollution

Novel technique for estimating pollution-associated leakage current in high-voltage insulators based on adaptive filtering in long-term recording

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