Influence of forest fire particles on the breakdown characteristics of air gap

Huang, Daochun; Ruan, Jiangjun; Han, Wei; Qin, Zhihang; Long, Mingyang; Pu, Ziheng; Wu, Tian

doi:10.1109/tdei.2016.7556469

Cited by 17 publications

(17 citation statements)

References 17 publications

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“…There have been plenty of theories trying to figure out breakdown voltages in lab experiment level [5], [29], [30]. Further in our paper, the process of the breakdown probability changes with time, determined by flame temperature and smoke density in the line buffer, also provides an illustration of the mechanism of impacts of wildfires to electrical transmission lines at the power system operating level.…”

Section: B Prediction Of Electrical Transmission Line Breakdownmentioning

confidence: 86%

“…To optimize the grid arrangement of firefighting resources and reduce economic losses, it is important to predict the spatial and temporal dynamics of fire propagation and integrate wildfire prediction into power transmission line for an early warning system. For the purpose of developing the early warning system, there are studies on two categories: 1) the studies mainly focused on wildfires e.g., monitoring fires with satellite or sensor networks [2], [23]- [25], or the mathematical modeling of the fire propagation toward transmission lines only [26]; and 2) the studies on consequences of transmission line confronting wildfires, through statistical approaches [27], [28], mathematical modeling [29] and high voltage experiments for flashover mechanisms [13], [30]. However, emphasizing solely on one aspect could not satisfy the requirements of a timely early warning system for transmission line confront wildfires.…”

Section: Discussionmentioning

confidence: 99%

“…In terms of current early warning methods of wildfires, satellite remote sensing method can monitor occurrence of wildfires, but cannot achieve realtime monitoring wildfire propagation due to the limitation of satellite overpass time. In addition, major environment noises such as clouds could significantly restrict the effectiveness of satellite sensing [30]. Wireless sensor networks perform much better when facing environment noises, however, it is subject to the problem of battery and might be damaged in the wilderness by animals, which will seriously affect its data transmission [8].…”

Section: Implications and Limitations Of The Early Warning Systemmentioning

confidence: 99%

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Integrating Wildfires Propagation Prediction Into Early Warning of Electrical Transmission Line Outages

Dian

Cheng

et al. 2019

IEEE Access

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Wildfires could pose a significant danger to electrical transmission lines and cause considerable losses to the power grids and residents nearby. Previous studies of preventing wildfire damages to electrical transmission lines mostly analyze wildfire and power system security independently due to their differences in disciplines and cannot satisfy the requirement of the power grid for active and timely responses. In this paper, we have designed an integrated wildfire early warning system framework for power grids, taking prediction of wildfires and early warning of line outage probability together. First, the proposed model simulates the spatiotemporal process of wildfires via a geography cellular automata model and predicts when and where wildfires initially get into the security buffer of an electrical transmission line. It is developed in the context of electrical transmission line operating with various situations of topography, vegetation, wind and, especially, multiple ignition points. Second, we have proposed a line outage model (LOM), based on wildfire prediction and breakdown mechanisms of the air gap, to predict the breakdown probability varying with time and the most vulnerable poles at the holistic line scale. Finally, to illustrate the validation and rationality of our proposed system, a case study for a 500-kV transmission line near Miyi county, China, is presented, and the results under various wildfire situations are studied and compared. By integrating wildfire prediction into the LOM and alarming the holistic line breakdown probability along time, this paper makes a significant contribution in the early warning system to prevent transmission lines to be damaged by wildfires, illustrating the related breakdown mechanisms at the line operation level rather than laboratory experiments only. Meanwhile, the implementation of cellular automata model under comprehensive environmental conditions and simulation of the breakdown probability for the 500-kV transmission line could serve as references for other studies in the community. INDEX TERMS Cellular automata, electrical transmission lines, earning warning, wildfire.

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Section: B Prediction Of Electrical Transmission Line Breakdownmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Implications and Limitations Of The Early Warning Systemmentioning

confidence: 99%

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Integrating Wildfires Propagation Prediction Into Early Warning of Electrical Transmission Line Outages

Dian

Cheng

et al. 2019

IEEE Access

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“…As shown in Equations (6)- (22), the voltage and current propagated along any transmission line will be affected by electromagnetic waves travelling along other parallel conductors due to the coupling of electromagnetic fields. If the characteristics of multiconductor transmission lines are symmetric, the electromagnetic wave propagating along those lines can be represented by the sum of three-phase voltage and current, with two different propagation constants and two different characteristic impedances.…”

Section: Modelling Of Parallel Multiconductor Transmission Linesmentioning

confidence: 99%

Voltage Distribution–Based Fault Location for Half-Wavelength Transmission Line with Large-Scale Wind Power Integration in China

et al. 2018

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Large-scale wind farms are generally far away from load centers, hence there is an urgent need for a large-capacity power transmission scheme for extremely long distances, such as half-wavelength transmission lines (HWTLs), which can usually span thousands of kilometers from large-scale wind farms to load centers. An accurate fault location method for HWTLs is needed to ensure safe and reliable operation. This paper presents the design of a modal voltage distribution-based asynchronous double-end fault location (MVD-ADFL) scheme, in which the phase voltages and currents are transformed to modal components through a Karenbauer transformation matrix. Then, the modal voltage distributions along transmission lines are calculated by voltage and current from double ends. Moreover, the minimums and intersection points of calculated modal voltages from double ends are defined as the fault location estimation. In order to identify incorrect fault location results and reduce calculation errors for the correct ones, air modal and earth modal voltage distributions are applied in the fault location estimations. Simulation results verify the effectiveness of the proposed approach under different fault resistances, distances, and types. Lastly, a real-time digital simulator (RTDS)-based hardware-in-the-loop (HIL) test is undertaken to validate the feasibility of implementing the proposed approach.

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“…In particular, a difference of up to 40% was noted in the presence of conductive particles. Therefore, to study the reduction in dielectric strength caused by flames, it is necessary to select materials that generate fewer conductive particles [6].…”

Section: Introductionmentioning

confidence: 99%

Study on the Decrease in Air Dielectric Strength of DC Voltage According to the Ignition Properties of Combustibles

Chun

Song

Kim³

2022

Applied Sciences

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Most electrical transmission lines are located in forests, and currently in South Korea, deregulation has allowed various structures to be built on the ground below transmission lines. Events of fires occurring below high-voltage transmission lines can lead to large-scale electrical accidents. To prevent such accidents, this study examined the ignition properties of combustible materials and their relationship with the reduction in air dielectric strength. Experiments were performed on two types of synthetic resins and lumbers, namely cypress and pine. A cone calorimeter was used to measure ignition properties such as effective heat of combustion, heat release rate, and soot yield. In addition, we built a dielectric strength testing device to measure the reduction in air dielectric strength caused by flames. These measurement results can serve as a basis for revising fire safety standards.

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Influence of forest fire particles on the breakdown characteristics of air gap

Cited by 17 publications

References 17 publications

Integrating Wildfires Propagation Prediction Into Early Warning of Electrical Transmission Line Outages

Integrating Wildfires Propagation Prediction Into Early Warning of Electrical Transmission Line Outages

Voltage Distribution–Based Fault Location for Half-Wavelength Transmission Line with Large-Scale Wind Power Integration in China

Study on the Decrease in Air Dielectric Strength of DC Voltage According to the Ignition Properties of Combustibles

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