A simulation method for winter pollution contamination of HV insulators

Ravelomanantsoa, N.; Farzaneh, M.; Chisholm, William A.

doi:10.1109/eic.2011.5996181

Cited by 17 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to simplify the analysis, only the extreme case of saturated electricity is considered, so Formula (5) is used to characterize the quantity of electric charge of polluted particles. The electric field force on polluted particles is expressed as Formula (6).…”

Section: Numerical Calculation and Analysis Of Electric Field Forcementioning

confidence: 99%

“…Plenty of research [6][7][8] has been done through simulation and pollution tests to reveal insulator contamination mechanisms. Literature [6] has put forward a power law relationship between the pollution accumulation rate and wind velocity through a simplified wind tunnel contamination experiment. Literature [7] built a pollution deposit model of rail insulator using a gas-solid aerosol flow simulation to show the rules of wind velocity affecting pollution deposits and distribution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Non-Uniform Distribution of Contamination on Composite Insulators in HVDC Transmission Lines

et al. 2018

View full text Add to dashboard Cite

In recent years, the air particulate pollutants formed by the combustion of fossil fuels and the emission of industrial waste gases have constantly been produced, and the polluted particles deposit also seriously affects social production and people’s lives. For instance, pollution-induced flashover is seriously threatening the safe operation of the power system, while insulator pollution non-uniformity has great influence on the flashover voltage of insulators. Therefore, in this paper both field contamination experiments of HVDC (High Voltage Direct Current) transmission lines and wind tunnel contamination simulation tests were conducted, and pollution non-uniformity coefficient KT/B, KW/L and KH/M were proposed and obtained. The results showed that the degree of contamination on top surface and leeward side is heavier than that on bottom surface and windward side. Thus, in the DC energized condition, contamination along the string is also non-uniform, and serious pollution occurs mainly in the high voltage terminal. In order to explain the uneven distribution phenomenon along the string, the coupling-physics model of composite insulator string was established and using the finite element method, the electric field around the insulator was simulated. Furthermore, basing on the field charging theory, the value of electric field force on particles around the insulator surface was calculated and the mechanism of non-uniformity along the insulator sting was then explained. The results are very important for guiding insulation design and field anti-pollution works.

show abstract

Section: Numerical Calculation and Analysis Of Electric Field Forcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Non-Uniform Distribution of Contamination on Composite Insulators in HVDC Transmission Lines

et al. 2018

View full text Add to dashboard Cite

show abstract

“…A large number of research studies have been conducted recently, through simulation and contamination tests, to study the contamination mechanism of insulators. By simplifying the wind tunnel pollution test, a power law relationship between the pollution accumulation rate and wind speed was proposed in [10]. In [11], a rail insulator pollution deposition model was established by using gas-solid aerosol flow simulation, and the influence of wind speed on pollution deposition and distribution was revealed.…”

Section: Introductionmentioning

confidence: 99%

Influence of DC Electric Fields on Pollution of HVDC Composite Insulator Short Samples with Different Environmental Parameters

et al. 2019

View full text Add to dashboard Cite

Pollution-induced flashover is a serious threat to the safe operation of power systems. With the development of High Voltage Direct Current (HVDC), it is necessary to study insulator contamination in DC electric fields. In this paper, the energized wind tunnel contamination test was conducted in order to systematically study the pollution ratio, k (ratio of non-soluble deposit density (NSDD) of a DC-energized condition to a non-energized condition), under different environmental parameters. Later, a two-dimensional contamination model of short samples of an HVDC composite insulator was established. The particle motion characteristics under different environmental parameters were then analyzed by the finite element method (FEM). The research results showed that—the DC electric field had an influence on particle motion but in different environments, the degree of influence was different. In addition, k was found to largely vary, with a variation in the environmental parameters. When the electrical stress (Es) increased from 0 to 70 kV/m, k increased gradually. However, when the wind speed (ws) increased, k experienced a decreasing trend. Finally, as the particle diameter (dp) decreased, k increased at first, followed by a decrease, and then again showed an increase. The results of the pollution ratio, k, for different environmental parameters are of great importance for guiding anti-pollution work in power systems.

show abstract

“…Liu [15] discussed the movement direction of fog particles in ionized field around HVDC transmission line, and studied the polarity of fog particles and motion characteristics in ionized field by the experiments, similarly to the works of Wang et al [13]. Ravelomanantsoa [16,17] raised an experiment similar to wind tunnel test to study the accumulation of road salt on the energized insulator, involved the factors of air flow velocity and salt particle diameter. From the results of experiment and calculation of scale model insulator, it was indicated that the factor airflow has the greatest influence on particle motion; the electric force causes the deflection of contamination particles as moving between the sheds [18].…”

Section: Introductionmentioning

confidence: 99%

Force and Motion Characteristics of Contamination Particles near the High Voltage End of UHVDC Insulator

Lan¹,

Zhang²,

Wang³

et al. 2017

Energies

View full text Add to dashboard Cite

Abstract:It is important to reveal the relations of physical factors to deposition of contaminants on insulator. In this paper, the simulation model of high voltage end of insulator was established to study the force and motion characteristics of particles affected by electric force and airflow drag force near the ultra-high voltage direct current (UHVDC) insulator. By finite element method, the electric field was set specially to be similar to the one near practical insulator, the steady fluid field was simulated. The electric force and air drag force were loaded on the uniformly charged particles. The characteristics of the two forces on particles, the relationship between quantity of electric charge on particles and probability of particles contacting the insulator were analyzed. It was found that, near the sheds, airflow drag force on particles is significantly greater than electric force with less electric charge. As the charge multiplies, electric force increases linearly, airflow drag force grows more slowly. There is a trend that the magnitude of electric force and drag force is going to similar. Meanwhile, the probability of particles contacting the insulator is increased too. However, at a certain level of charge which has different value with different airflow velocity, the contact probability has extremum here. After exceeding the value, as the charge increasing, the contact probability decreases gradually.

show abstract

A simulation method for winter pollution contamination of HV insulators

Cited by 17 publications

References 6 publications

Non-Uniform Distribution of Contamination on Composite Insulators in HVDC Transmission Lines

Non-Uniform Distribution of Contamination on Composite Insulators in HVDC Transmission Lines

Influence of DC Electric Fields on Pollution of HVDC Composite Insulator Short Samples with Different Environmental Parameters

Force and Motion Characteristics of Contamination Particles near the High Voltage End of UHVDC Insulator

Contact Info

Product

Resources

About