Influence of Ambient Electric Field on the Corona Performance of HVdc Transmission Lines

Maruvada, P. Sarma

doi:10.1109/tpwrd.2013.2278343

Cited by 49 publications

(44 citation statements)

References 11 publications

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“…Fernando et al found that corona could occur even on wellworking equipment in DC system, which can cause surface charge accumulation on the insulation materials [14,15]. Kumara et al studied the dependence of charge injection on the initial applied voltage and environmental humidity [16,17].…”

Section: Introductionmentioning

confidence: 99%

Effects of ambient temperature on surface charge and flashover of heat-shrinkable polymer under polarity reversal voltage

2016

IEEE Trans. Dielect. Electr. Insul.

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DC transmission helps to solve the decentralization of distributed wind power generation and other renewable power sources to enhance system performance. But the existence of surface charges by the corona makes earlier insulation failure and plays an important role during the development of the surface flashover. The influences of the ambient temperature and the polarity reversal voltage on the surface charge and the flashover of the heat-shrinkable polymer are not completely clear. In this paper, the carrier mobility and the volume conductivity were employed to explain the temperature dependent surface charge decay results. The initial surface charge density and decay rates served for analyzing the effects of polarity reversal voltage. Furthermore, the flashover experiments of the samples charged by the polarity reversal voltage at different ambient temperatures were conducted. Obtained results show that the descending speed of the surface charge becomes faster at higher temperature. An obvious temperature dependence of the carrier mobility and the volume conductivity is observed. Moreover, the surface charges of the samples charged by the voltage with shorter reversal time decay more rapidly. The flashover voltage increases with the increasing ambient temperature because of less accumulated surface charges in this condition. Considering the accelerated surface charge decay by the increasing temperature and easier charge accumulation during the steady negative period, attentions should be paid to the design of DC insulation and the security of operation.Index Terms -DC transmission and distribution equipment, ambient temperature, corona discharge, heat-shrinkable polymer, polarity reversal voltage, surface charge, flashover voltage.

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Section: Introductionmentioning

confidence: 99%

Effects of ambient temperature on surface charge and flashover of heat-shrinkable polymer under polarity reversal voltage

2016

IEEE Trans. Dielect. Electr. Insul.

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“…Meanwhile, other environmental factors, such as humidity and temperature, also affect the breakdown intensity to some extent. [11][12][13][14][15] However, comparing with the air density, the effects of these factors are not significant.…”

Section: Dielectric Breakdown Performancementioning

confidence: 99%

Development of a sensor for corona current measurement under high-voltage direct-current transmission lines

Xin

Yuan

2016

International Journal of Distributed Sensor Networks

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A sensor-based distributed measurement system is designed for collecting and monitoring the corona current under the extremely high-voltage direct-current transmission lines. It is highly significant for researching the corona characteristics of extremely high-voltage direct-current transmission lines to reduce the corona effect, operating loss, and environmental impact. A new shared memory strategy has been studied based on field-programmable gate array and ARM. Based on field-programmable gate array technology, the fiber-optic transmission scheme for wide-frequency corona current highspeed signal has been set up to ensure the safety and the reliability of corona current measurement system. The proposed system has been used in China's state grid high-voltage direct-current test base and the in situ power transmission projects. Based on the experimental results, the proposed measurement system demonstrates that it can adapt to the complex electromagnetic environment under the transmission lines and can accomplish the accurate, flexible, and stable demands of the electric-field measurement.

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“…In order to meet the demand of long-distance bulk power transmission, many ultra-high-voltage direct current (HVDC) transmission projects will be operated or constructed in China. Corona discharge occurs when the electric fields around the surface of HVDC lines exceed the corona onset value [1][2][3]. Electric field, ion current density, space charge density, radio interference (RI), and audible noise (AN) are essential parameters for the design and operation of HVDC lines [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Calculation of Surface Electric Fields on the Lighting Conductors near HVDC Transmission Lines

Liu¹,

Ma²,

Zhang³

et al. 2018

Advances in Intelligent Systems Research

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Corona discharge may occurs when the lighting conductors are close to the HVDC transmission lines. In this paper, the ion flow electric field on the surface of lighting conductors is calculated by flux tracing method. According to the calculated results, influences of the height, radius and distance of lighting lines on surface electric field are discussed, and the approaches to reduce the electric field strength is given.

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Influence of Ambient Electric Field on the Corona Performance of HVdc Transmission Lines

Cited by 49 publications

References 11 publications

Effects of ambient temperature on surface charge and flashover of heat-shrinkable polymer under polarity reversal voltage

Effects of ambient temperature on surface charge and flashover of heat-shrinkable polymer under polarity reversal voltage

Development of a sensor for corona current measurement under high-voltage direct-current transmission lines

Calculation of Surface Electric Fields on the Lighting Conductors near HVDC Transmission Lines

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