Research on DC ice-melting technologies for 500kV AC transmission lines

Hao, Wen; Peng, Shurong; Lu, Jiazheng

doi:10.1109/drpt.2015.7432518

Cited by 5 publications

(3 citation statements)

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“…Melting ice can significantly reduce the isolation between the ground wire and transmission lines; hence, the discharge may occur if transmission lines are still transmitting the energy. e swing of transmission lines induced by ice melting is analyzed in the experiment environment in [1][2][3][4][5]. Zhuang et al and Nie et al [6,7] applied a trend prediction model for the ice freezing and development of deicing based on the micrometeorology monitor.…”

Section: Introductionmentioning

confidence: 99%

Identification of Permanent Faults and Disturbance Induced by Deicing Based on Permutation Entropy for the Large-Scale Clean Energy Transmission in Winter

Wang¹,

Tang²,

Xiang³

et al. 2021

Mathematical Problems in Engineering

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Ice shedding may induce isolated ground wires’ temporary grounding, which can cause electric quantities of direct current (DC) deicing devices to fluctuate. Hence, the disturbance of ice shedding is able to trigger the protective relay frequently and unnecessarily, which adversely affects the deicing process. Due to the randomness of ice shedding, the grounding resistance varies quickly; thus, the disturbance in poles of deicing devices can be detected multiple times in a short time. Moreover, the permanent fault requires steady arc plasma because of the low output voltage and current of deicing devices, which cannot bring out multiple-time disturbances in the poles. This paper proposes the identification of permanent faults and disturbance induced by deicing based on the permutation entropy, which is verified by a large number of simulations.

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Section: Introductionmentioning

confidence: 99%

Identification of Permanent Faults and Disturbance Induced by Deicing Based on Permutation Entropy for the Large-Scale Clean Energy Transmission in Winter

Wang¹,

Tang²,

Xiang³

et al. 2021

Mathematical Problems in Engineering

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“…In addition, the ground wire, which connects the earth with the tower, needs to be isolated from the tower for the propagation of the DC current. Thus, any grounding points in the tower can block the de-icing for the whole line (Hao et al, 2015;Jiazheng et al, 2016;Zhu et al, 2019a;Zhu et al, 2019b;Guo et al, 2019;Haleem and Rajapakse, 2019;De Oliveira Neto et al, 2021). To maintain the lightning protection of ground wires, grounding switches are distributed along transmission lines.…”

Section: Introductionmentioning

confidence: 99%

Fault Location Scheme for Abnormal Grounding Point in Isolated Ground Wire of Large-Scale Clean Energy Transmission

Wang

Yang

2021

Front. Energy Res.

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There is a large number of grounding switches along the isolated ground wire for the de-icing in the large-scale wind farm. If any of these grounding switches are left open by accident, this can create an unexpected abnormal grounding point in the isolated ground wire. Based on the analysis of the output power of de-icing devices, the output power of different poles can be applied for the abnormal grounding point fault location. Since the rise of output current to the rated current of de-icing devices requires a long time to build up, the protective relay may lock the de-icing device before the output current reaches the rated current. Thus, the ratio of output energy of two poles can be selected to locate the abnormal grounding point. This study verified this location method by conducting a large number of simulations.

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“…[1]Compared with other accident, ice damage to power grid losses tend to be more serious, flash light, ice, or cause tower (rod), bolt, or even shut down power grid.And with the rapid development of power grids, high pressure and ultra-high voltage transmission lines across the ice region is becoming more and more affected the possibility of ice caused power grid is becoming more and more big.Ice disaster prevention and control is one of the key research of the development of grid technology, both at home and abroad of anti-icing and deicing of methods and techniques are studied, and effective melting technology will play an important role in the fight against the ice disaster, this paper introduces the theory of melting ice in dc, are compared, and the related technology of direct melt and illuminates the 500 kv and above level line using dc melting method, the advantages of a specific 500 kv line, for example, has carried on the design of the dc melting ice [3].…”

Section: Introductionmentioning

confidence: 99%

The DC Melting Technology Research of the 500 kV Transmission Line

Li¹,

Hao²,

Ran³

2015

Advances in Intelligent Systems Research

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Abstract. Transmission lines ice cover is a kind of serious natural disasters, is one of the major problems to endanger the safety of transmission lines running.Communication often short-circuit current melting ice is melting ice the problem of insufficient power supply capacity is much, and dc melting technology is a kind of ideal and effective method.The basic theory of dc melting technology was analyzed, and the critical current of melting ice in dc are calculated, the calculated for a specific current 500 kv transmission line of melting ice, and preliminarily determines the melting ice, has carried on the simulation analysis using PSCAD/EMTDC software, in order to confirm the availability and effectiveness.

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Research on DC ice-melting technologies for 500kV AC transmission lines

Cited by 5 publications

References 0 publications

Identification of Permanent Faults and Disturbance Induced by Deicing Based on Permutation Entropy for the Large-Scale Clean Energy Transmission in Winter

Identification of Permanent Faults and Disturbance Induced by Deicing Based on Permutation Entropy for the Large-Scale Clean Energy Transmission in Winter

Fault Location Scheme for Abnormal Grounding Point in Isolated Ground Wire of Large-Scale Clean Energy Transmission

The DC Melting Technology Research of the 500 kV Transmission Line

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