Investigation on corona performance of conductors using fabricated indoor corona cage

Megala, V.; Karpagam, R.; Sathishkumar, G.; Gopinath, B.; Kumar, P. Marish; Brindha, M.

doi:10.1016/j.matpr.2020.10.682

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…Under the influence of DC voltage, the dispersion of the DC breakdown voltage in air gaps is generally minimal. The equation for estimating the corona inception field strength for positive polarity conductors can be approximated using the empirical formula proposed by J.B. Whitehead, as shown in Equation ( 1) [21].…”

Section: Construction Of Experimental Platform and Experimental Methodsmentioning

confidence: 99%

Research on Ultraviolet Characteristic Parameters of DC-Positive Polarity Corona Discharge on Conductors

Dai,

Zhang,

Dong

et al. 2024

Applied Sciences

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The detection of corona-related defects in transmission lines has been included in the work of transmission line defect detection. Ultraviolet detection technology has gradually been widely applied in the field of corona discharge detection. However, the current research on the application of ultraviolet detection technology in transmission lines is relatively simple and mainly limited to using changes in the photon count to determine whether corona discharge has occurred. To address this, this study used a mini corona cage to simulate transmission lines and measured the changes in the photon count, spot area, and corona current in the corona inception process of different types of smooth, stainless-steel conductors. This study also investigated the variations in the photon count and spot area depending on conductor corona intensity, ultraviolet imager gain, and observation distance. The results show that the photon count and spot area can, to some extent, reflect the intensity of corona discharge. Both the photon count and spot area exhibited quadratic relationships with the voltage. As the observation distance increased, both the photon count and spot area showed exponential decay. The photon count exhibited a trend of initially increasing, then decreasing, and finally increasing again with the increase of gain, while the spot area showed exponential growth with increasing gain. The photon count and spot area can complement each other to identify and characterize the intensity of corona discharge.

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Section: Construction Of Experimental Platform and Experimental Methodsmentioning

confidence: 99%

Research on Ultraviolet Characteristic Parameters of DC-Positive Polarity Corona Discharge on Conductors

Dai,

Zhang,

Dong

et al. 2024

Applied Sciences

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“…For this purpose, our solution is focused on connecting APIs directly which enhances data transfer in real-time more than regular hardware and software connections. Recent trends suggest that in years to come paperless payments have a bigger advantage over the conventional methods of payments [26][27][28][29]. The proposed solution is developed based on the concept of supporting contactless payments and developing a payment gateway for the app that makes payments more sophisticated for users [30][31][32][33][34].…”

Section: Algorithm For the User Interfacementioning

confidence: 99%

Next Generation Parking System with Computer Vision and Machine Learning

T¹,

Megala²,

S³

et al. 2022

ECS Trans.

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Parking management is a term that describes methods for making better use of parking resources. The first step toward successful parking management is to identify the cause of the problem. Finding suitable parking is among the fastest-growing industries of all, given the ever-increasing number of cars on the road. Traditionally, traffic has been a nightmare. To address these issues, businesses adopted intelligent parking systems from large hardware vendors. These, on the other hand, are unfit for purpose and also have resulted in major parking issues at many businesses. The approach attempts to offer a practical answer to the problem of smart parking. We aim to create a functioning software that will inform requesting customers if there is still a free parking spot near their location using technologies like Machine Learning, CNN, OpenCV, and React.

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“…The occurrence and intensity of corona discharges, and hence their losses, is affected by the following factors: The electric field gradient on the conductor surface [16,17], the conductor surface condition [6,18], weather conditions [19][20][21], the relative air density [22,23], the effect of water on the conductor surface [20,22], the average operating voltage of the line [19,24,25], the size of phase conductors [18,26], bundled conductor lines [5,12,16,17], the existence or not of shield conductors [27], the sag value of the phase and shield conductors [28], the line unbalance and the type of structure.…”

Section: Introductionmentioning

confidence: 99%

“…In overhead conductors, the effect is visible in the darkness, being possible to appreciate how they are surrounded by a luminous, bluish, circular cross-section halo [1,4,5] in the form of a corona. Corona effect, produces audible hissing in the vicinity of the transmission lines, power and energy losses, television interference and corrosion in conductors and metal fitting of lines [4,[6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A new method to calculate corona losses for active conductors considering real transmission line unbalance

Llamo‐Laborí

Fuentefria

2022

The Journal of Engineering

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This paper shows the characteristics of an algorithm that calculates the corona losses of transmission lines. The line can have up to four circuits, with any configuration, with single or bundled conductors, and taking into account the line unbalance. This is achieved by modelling the lines in phase quantities, for active conductor, and calculating the corona losses for each one. The results are given per active conductor and average per bundle. In lines with several conductors per phase the results are given per circuit and a total one. These characteristics allow choosing the most convenient configuration and spacing for the conductor bundles, which will reduce and balance corona losses. The results found with this method show that the value of the losses calculated with the formulas with transmission lines symmetrically transposed is conservative. The configuration and the number of conductors per phase have a noted influence in the value and the asymmetry of the corona losses. In double circuit lines, corona losses can be reduced by changing the arrangement of the phases of circuit two in reference to circuit one, with the advantage that, at the design stage, those changes are costless.

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Investigation on corona performance of conductors using fabricated indoor corona cage

Cited by 6 publications

References 18 publications

Research on Ultraviolet Characteristic Parameters of DC-Positive Polarity Corona Discharge on Conductors

Research on Ultraviolet Characteristic Parameters of DC-Positive Polarity Corona Discharge on Conductors

Next Generation Parking System with Computer Vision and Machine Learning

A new method to calculate corona losses for active conductors considering real transmission line unbalance

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