Assessment of Overvoltage and Insulation Coordination in Mixed HVDC Transmission Lines Exposed to Lightning Strikes

Asif, Mansoor; Lee, Ho-Yun; Park, Kyu-Hoon; Shakeel, Ayesha; Lee, Bang-Wook

doi:10.3390/en12214217

Cited by 9 publications

(7 citation statements)

References 20 publications

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“…Insulation coordination strategy for underground cables is based upon the standard industry test waveshape (10 kA, 8/20 µs), and in adverse situations at an unprotected cable terminal, the surge doubles. As shown in our previous research work, for an exceptionally high-magnitude unipolar lightning stroke, the overvoltage exceeded the LIPL of only unprotected shorter cables [35]. In case of bipolar lightning strokes even with minimal lightning stroke parameters, the voltage surge at the cable terminals exceeds the assumed margin of the worst-case scenario for cable insulation.…”

Section: Discussionsupporting

confidence: 51%

A Study of Fast Front Transients of an HVDC Mixed Transmission Line Exposed to Bipolar Lightning Strokes

et al. 2021

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Bipolar lightning strokes are associated with multiple polarity electrical discharge with no current intervals in between, making their behavior quite peculiar. This work presents a fast front analysis of a mixed high voltage direct current (HVDC) transmission link, evaluating the factors that influence the line transients due to shielding failures and back flashovers (BFOs), considering both overvoltage and repeated polarity reversal at the cable sending terminal. The research process includes a detailed modeling of a bipolar lightning stroke, frequency-dependent HVDC overhead, and underground transmission line sections. Noticeable findings include the occurrence of only a positive polarity insulator BFO for the adjacent and subsequent tower, despite the dual polarity of the lightning stroke with relatively small values for the lightning parameters. The influence of traveling waves on the insulator flashover performance of the line with varying parameters (such as the riser section length, the tower grounding impedance, and the location of the lightning stroke) is recorded and explained.

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Section: Discussionsupporting

confidence: 51%

A Study of Fast Front Transients of an HVDC Mixed Transmission Line Exposed to Bipolar Lightning Strokes

et al. 2021

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“…After passage of the surge, the arrester is capable of returning to its initial state. Accordingly, insulation coordination is one of the MOSA applications [1]. They have been selected according to standard insulation levels of electrical equipment, so that power system overvoltage has been limited in a particular level.…”

Section: Metal Oxide Surge Arrester (Mosa): Definition Application and Testsmentioning

confidence: 99%

Surge arrester operation investigation in low‐ and high‐current regions using MATLAB GUI: Implementing an educational goal for undergraduate students

Seyyedbarzegar

Khodsuz

2021

Comp Applic In Engineering

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Metal oxide surge arresters (MOSAs) have been widely used as protective devices against switching and lightning overvoltages in power electrical systems. MOSAs have dynamic characteristics in low‐ and high‐current regions. The unique model of MOSA, which is able to evaluate all the possible operating conditions of power systems, would surely be so complicated. Therefore, by the selection of an operating condition, the appropriate model of MOSA has been created. Many parameters affect MOSA performance in low‐ and high‐current regions. As a result, MOSA's performance under different operating conditions has been investigated by using a MATLAB GUI environment. To make a software environment to simulate MOSA performance in a high voltage laboratory, temperature variations influence on leakage current and its harmonic components under power frequency applied voltages and also the efficacy of impulse parameters variations on MOSA's residual voltage have been investigated. The designed graphical environment has been used by 40 electrical engineering students. The results showed that the use of the graphical environment had a great impact on the concepts' understanding of MOSA's performance.

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“…Further, to assess the reliability of an HVDC system under the action of lightning impulse (LI) phenomena, a test has been performed on a high voltage (HV) divider. In addition to these analyses, several researchers in References 11‐13 have assessed LI voltage phenomena in mixed HVDC transmission lines in 110 kV double circuit line insulators. The overall performance analysis of a power system exposed to LI phenomena leads to the system components' failure analysis and maintenance strategy, as discussed in Reference 14.…”

Section: Introductionmentioning

confidence: 99%

Reliability assessment for DFIG ‐based WECS considering the impact of 3‐phase fault and lightning impulse voltage

Kumar

Sarita

Saket

et al. 2021

Int Trans Electr Energ Syst

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Summary The assimilation of wind energy into the conventional grid brings several considerable challenges when uncertainties are considered. The uncertainties, including the occurrence of three‐phase fault and lightning fault, are considered to analyze the reliability and performance of the wind energy system. So, a study is a prerequisite for the power system, including wind farm (WF), voltage source converter (VSC), and lightning voltage and current phenomena. Therefore, the present work deals with the generation of lightning envelopes of impulse voltage and current and rectangular pulse current by considering the realistic equivalent circuit. The generated impulse voltage acting as a lightning fault is then implemented on the 3‐phase terminals of grid‐connected Doubly Fed Induction Generator (DFIG) based Wind Integrated Power System (WIPS), which includes six wind turbines (WT) of 1.5 MW each and 120 kV, 60 Hz grid. A 3‐phase short circuit fault is applied further to compare the output responses of the DFIG‐based WIPS. The system's behavior under both faults is observed by determining the controller gain values. The gains, including proportional (kp) and integral (ki) of a sixth‐order transfer function for Wind Turbine Generator (WTG), have been determined by using particle swarm optimization (PSO) algorithm. A reliability assessment of VSC considering DC voltage is done using the Monte‐Carlo (MC) method, considering the lightning impulse voltage (LIV) as a major cause of converter failure. It is found that the DFIG‐based WIPS achieves considerable responses under both types of faults by obtaining the optimal controller values. It has been also observed that the reduction in the number of failures that occurred in VSC during the lightning strike improves the system's reliability.

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Assessment of Overvoltage and Insulation Coordination in Mixed HVDC Transmission Lines Exposed to Lightning Strikes

Cited by 9 publications

References 20 publications

A Study of Fast Front Transients of an HVDC Mixed Transmission Line Exposed to Bipolar Lightning Strokes

A Study of Fast Front Transients of an HVDC Mixed Transmission Line Exposed to Bipolar Lightning Strokes

Surge arrester operation investigation in low‐ and high‐current regions using MATLAB GUI: Implementing an educational goal for undergraduate students

Reliability assessment for DFIG ‐based WECS considering the impact of 3‐phase fault and lightning impulse voltage

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