LPM-Based Shielding Performance Analysis of High-Voltage Substations Against Direct Lightning Strokes

Rahiminejad, Abolfazl; Vahidi, B.

doi:10.1109/tpwrd.2016.2616518

Cited by 21 publications

(9 citation statements)

References 33 publications

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“…The next movement of lightning toward the ground is varying in one or more directions. The concept of the lightning process can be demonstrated as follows: a half sphere is taken into consideration after the end of every step, below the leader tip associated with its middle point and radii of the following step length as indicated in Figure 7 52‐54 . The half sphere shape contains many potential points that can be chosen as the following leap point.…”

Section: Lapo Methods Basicsmentioning

confidence: 99%

“…The concept of the lightning process can be demonstrated as follows: a half sphere is taken into consideration after the end of every step, below the leader tip associated with its middle point and radii of the following step length as indicated in Figure 7. [52][53][54] The half sphere shape contains many potential points that can be chosen as the following leap point. The following leap point is chosen in a random manner, whereas the points possessing the largest value of the electrical domain through the connecting line from the leader tip to the identical point have the higher possibility as the next leap point.…”

Section: Downward Leader Motion In the Direction Of The Groundmentioning

confidence: 99%

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Optimal power flow solution incorporating a simplified UPFC model using lightning attachment procedure optimization

Taher¹,

Kamel

Ebeed

2019

Int Trans Electr Energ Syst

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Summary Unified power flow controller (UPFC) is utilized to regulate the bus voltage as well as the power flow through a power system. A solution of optimal power flow (OPF) problems with UPFC is a crucial and complex task due to the required modifications for considering the parameters of UPFC. This work proposes a simplified UPFC modeling into an OPF code in order to avoid the programming complexity. Moreover, the solution of an OPF problem with a UPFC model is obtained by a recent physical‐based optimization technique called lightning attachment procedure optimization (LAPO). Different objective functions including minimizing fuel cost and fuel cost with valve point effect (VPE), reduction of emission, improvement of voltage profile, and improving the voltage stability index are considered. The proposed algorithm is tested using the standard IEEE 30‐bus system. The results obtained by the proposed algorithm are compared with those obtained by other optimization techniques. However, the obtained results verify the applicability of the simplified UPFC model in OPF.

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Section: Lapo Methods Basicsmentioning

confidence: 99%

Section: Downward Leader Motion In the Direction Of The Groundmentioning

confidence: 99%

Optimal power flow solution incorporating a simplified UPFC model using lightning attachment procedure optimization

Taher¹,

Kamel

Ebeed

2019

Int Trans Electr Energ Syst

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“…In each step of the downwards leader movement, leader path is substituted by vertical and horizontal charge lines and thus the amount of charges increases along the path [17,22,23]. Electrical charge density of downward leader is obtained using the following relation that is based on lightning waveforms electrostatic measurements [34]:…”

Section: Leader Progression Model and Final Jumpmentioning

confidence: 99%

“…The performance of lightning protection system of different types of structures such as transmission lines [17,20,21], communication towers [22] and substations [23] has been evaluated so far using the LPM in conjunction with the charge simulation method (CSM). Relevant to the type of structure, most important equipment which is identified to be vulnerable against lightning are modelled both in size and position.…”

Section: Introductionmentioning

confidence: 99%

Analyses of launch sites lightning protection systems by 3D numerical modelling and experimental tests

Aslani

Yahyaabadi²,

Vahidi

2018

IET Science, Measurement & Technology

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“…Lightning is a significant cause of temporary and permanent power outages, due to the abnormal stresses it puts on the distribution lines. Studies from China, Japan, and Malaysia indicate that lightning is a major cause of power outages [1,2], with 40-70% of the total number of outages caused by lightning [3]. In Thailand, statistics from the Metropolitan Electricity Authority (MEA) [4] report 5000 outages per year with an unknown cause that may be the result of lightning hitting the system.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Direct Lightning Strike to the 24 kV Distribution Lines in Thailand

Sestasombut

Ngaopitakkul

2019

Energies

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This paper evaluates the effect of a lightning strike directly on the 24 kV distribution lines in Thailand, where such strikes are one of the main causes of power outages. The voltage across the insulator, and the arrester energy absorbed due to the lightning, need to be analyzed for different grounding distances of the overhead ground wire, ground resistance, lightning impact positions, and lightning current waveforms. Analysis and simulations are conducted using the Alternative Transients Program/Electromagnetic Transients Program (ATP/EMTP) to find the energy absorbed by the arrester and the voltages across the insulator. The results indicate that when surge arresters are not installed, the voltage across the insulator at the end of the line is approximately 1.4 times that in the middle of the line. In addition, the ground resistance and grounding distance of the overhead ground wire affect the voltage across the insulator if the overhead ground wire is struck. When surge arresters are installed, a shorter grounding distance of the overhead ground wire and a lower ground resistance are not always desirable; this is because they reduce the back-flashover rate and the voltage across the insulator if lightning strikes the overhead ground wire. However, lightning strikes to the phase conductor result in high arrester energy and the possibility that the arrester will fail. Furthermore, the tail time of the lightning waveform is a significant variable when considering the energy absorbed by the arrester, whereas the front time is important for the voltage across the insulator. In case lightning strikes directly on the connected point between the overhead lines and the underground cables, the distribution line system is protected only by the lightning arrester at the connection point. The overvoltage at the connection point is lower than the basic impulse level at 24 kV of 125 kV, but the overvoltage at the end of the cable is still more than 125 kV in case the cable is longer than 400 m. When the distribution line system is protected by the lightning arrester at both the connection point and the end of the cable, it results in overvoltage throughout the cable is lower than the critical flashover of insulation. This method is the best way to reduce the failure rate of underground cables and equipment that are connected to the distribution line system.

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LPM-Based Shielding Performance Analysis of High-Voltage Substations Against Direct Lightning Strokes

Cited by 21 publications

References 33 publications

Optimal power flow solution incorporating a simplified UPFC model using lightning attachment procedure optimization

Optimal power flow solution incorporating a simplified UPFC model using lightning attachment procedure optimization

Analyses of launch sites lightning protection systems by 3D numerical modelling and experimental tests

Evaluation of a Direct Lightning Strike to the 24 kV Distribution Lines in Thailand

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