Experimental-based models for predicting the flashover voltage of polluted SiR insulators using leakage current characteristics

Samakosh, Jaber Dadashizadeh; Mirzaie, Mohammad

doi:10.1049/iet-smt.2020.0021

Cited by 9 publications

(4 citation statements)

References 27 publications

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“…To date, few studies have investigated the performance of aged polymeric insulators with respect to LC. In [16], the LC was used to predict flashover voltage. The above study is limited to LC performance as a parameter of the prediction model.…”

Section: Introductionmentioning

confidence: 99%

“…The shape factor of the insulator, its height, and diameter are important factors affecting flashover performance [23]. In [16], experiments were conducted to predict the flashover voltage of two different profiles of composite insulators under various pollution levels and hydrophobicity classes, using flashover voltage and LC tests, where the components of LC were used as input for artificial neural network (ANN) model. Authors in [24] stated that the analysis of the LC of insulators aided in the assessment of high-voltage insulator conditions.…”

Section: Introductionmentioning

confidence: 99%

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Investigating and Modeling Ageing Effects on Polymeric Insulator Electrical Properties

et al. 2023

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Polymeric insulators, in particular silicone rubber (SIR) are lightweight, have good hydrophobicity characteristics, and are easy to carry and install. They are commonly used for outdoor insulation in power lines. However, pollution, UV radiation, temperature, discharge, wetness, and stress can cause them to degrade over time, losing their electrical properties. Therefore, evaluating the ageing and degradation of polymeric insulators under different conditions becomes crucial. This paper investigates the ageing effects of the polymeric insulators with differences in pollution, applied voltage, hydrophobicity class, and geometrical structures of insulators. The investigation includes the experimental tests of the insulators' electrical properties such as leakage current and flashover voltage, after assessing the initial characteristics of insulators based on their age and supply voltage. In addition, the aged polymeric insulator model based on an equivalent circuit model was developed to determine the leakage current and breakdown voltage of aged insulators. Moreover, an artificial neural network model is carried out to predict the critical leakage current and flashover voltage of the insulator under the ageing effect. The experiment results were used to validate the accuracy of the proposed models; with an aggregate error of less than 10%, the proposed models appeared to be satisfactory. These models can serve as a scholarly resource for designing, operating, and maintaining insulators, especially in polluted environments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating and Modeling Ageing Effects on Polymeric Insulator Electrical Properties

et al. 2023

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“…For aged samples, an extensive analysis of leakage current has been carried out in [27][28][29][30][31][32]. The investigation has been conducted on non-uniform and also longitudinal conditions based on experimental tests.…”

Section: Introductionmentioning

confidence: 99%

Condition assessment criteria evaluation of asymmetric aged and fully aged silicone rubber insulators based on leakage current harmonics

Esmaieli,

Khodsuz,

Nouri

2023

IET Science Measure & Tech

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The leakage current characteristic monitoring of transmission line insulators is considered a worthy technique for insulator state prediction. In this paper, the harmonic analysis of leakage current signals has been performed to analyze the composite insulator condition. Experimental studies of asymmetrically aged, fully aged, and virgin insulators have been conducted. The effects of different aging types, pollution, and humidity on leakage current components, such as harmonics and the phase differences with the applied voltage, have been investigated. The analysis of the results shows that the effect of asymmetric aging on leakage current components is non‐linear, and this non‐linearity increases with the degree of pollution. Also, the type of insulator aging can be determined by the ratio of the third‐ and fifth‐order leakage current harmonics. For instance, the classification of insulators into virgin, asymmetrically aged, and fully aged can be determined by examining the corresponding value ranges of 0–0.5, 0.5–0.9, and > 0.9, respectively. Similarly, the phase difference values of < 15% and those > 15% indicate the clean and polluted operating conditions individually.

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“…Otros autores proponen evaluar el rendimiento del aislador en base al número de pulsos, el valor pico y la carga acumulada de la corriente de fuga [101,102]. Dadashizadeh ha propuesto un modelo de redes neuronales artificiales para predecir la tensión de descarga disruptiva a partir de ESDD, grado de heterogeneidad de contaminación, edad, corriente fundamental y distorsión armónica, obteniendo un error relativo <6.4% [103].…”

Section: Corriente De Fuga Como Medio De Diagnósticounclassified

Contribución al mantenimiento de aisladores de alta tensión en servicio basado en medidas de corrientes de fuga

Bueno Barrachina

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Resumen iv mediante el aprendizaje en cascada de la arquitectura inception que permite extraer simultáneamente la información local y regional (en distintos instantes de tiempo) cada vez más extensa. Tanto el modelo 2IL-CNN (R 2 : 0.89±0.06) como el 4IL-CNN (R 2 : 0.94±0.03) obtuvieron rendimientos sustancialmente superiores al modelo 2SL-CNN (R 2 : 0.73±0.11), y este a su vez ligeramente superior que SVR (R 2 : 0.70±0.13), siendo estas diferencias estadísticamente significativas. A pesar del complejo proceso de humedecido con depósitos de contaminación en los aisladores de silicona, el modelo 4IL-CNN es válido para predecir la corriente de fuga tanto en aisladores cerámicos con o sin recubrimientos de silicona como aisladores de silicona, y además fácilmente adaptable a otras subestaciones.

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Experimental-based models for predicting the flashover voltage of polluted SiR insulators using leakage current characteristics

Cited by 9 publications

References 27 publications

Investigating and Modeling Ageing Effects on Polymeric Insulator Electrical Properties

Investigating and Modeling Ageing Effects on Polymeric Insulator Electrical Properties

Condition assessment criteria evaluation of asymmetric aged and fully aged silicone rubber insulators based on leakage current harmonics

Contribución al mantenimiento de aisladores de alta tensión en servicio basado en medidas de corrientes de fuga

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