A study on effects of conducting particles in SF/sub 6/ gas and test methods for GIS

Hattori, Toshiitsu; Honda, Masaki; Aoyagi, H.; Kobayashi, N.; Terasaka, Kenichiro

doi:10.1109/61.4246

Cited by 49 publications

(16 citation statements)

References 3 publications

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“…The decision was made by referring to the paper on the voltage-time (V-t) characteristics of metallic particles in GIS which have random chance failure pattern, where flashover can happen without PD in advance. [2] The experience gives noteworthy suggestion that the current on-line PD monitoring technology did not work perfectly enough. The future PD monitoring development will probably demand a faster data acquisition and interpretation.…”

Section: Factory Acceptance Test and Site Acceptance Testmentioning

confidence: 95%

Partial discharge monitoring system for CLP power strategic 400 kV GIS extension at black point power station

Ito

Taniguchi

Kamei

et al. 2009

8th International Conference on Advances in Power System Control, Operation and Management (APSCOM 2009)

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CLP Power Hong Kong Limited (CLP Power) has reinforced its 400kV power grid by introducing new extension switchgear to the Black Point Power Station (BKP). Since the circuits are of strategic importance to provide more generation infeed capacity and any fault must be avoided by all means, if possible, to ensure high supply reliability, CLP Power has created a cooperative arrangement with Mitsubishi Electric, the original equipment manufacturer of the 400kV gas insulated switchgear (GIS) for BKP to establish an effective solution using the condition-based maintenance (CBM) approach. So an On-line partial discharge (PD) monitoring system has been installed with operation and maintenance support from the manufacturer. The design of the PD coupler has been integrated with the GIS design, with high sensitivity and reliability, while meeting recognized standards. The system can also cope with future expansion. Establishing a methodology on how to diagnose the insulation healthiness of GIS using the PD monitoring system is of high importance to the CBM practice. The PD monitoring system has been working satisfactorily since its full commissioning in June 2008. There is also a good collaboration between the teams in building up the future CBM requirements through the analysis of PD monitoring data and providing expertise support.The paper is intended to share (a) the information on key technical requirements, system design, architecture, layout arrangement and provisions on the GIS of the PD monitoring and, (b) the experience in factory acceptance test, site acceptance test and subsequent operation of the system.

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Section: Factory Acceptance Test and Site Acceptance Testmentioning

confidence: 95%

Partial discharge monitoring system for CLP power strategic 400 kV GIS extension at black point power station

Ito

Taniguchi

Kamei

et al. 2009

8th International Conference on Advances in Power System Control, Operation and Management (APSCOM 2009)

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“…Sakai studied the movement and corona discharge characteristics of wire‐type metallic particles and found that the particles exist in different states of motion under the electric force and move toward the high‐field region, then causing gap breakdown in the high‐field region. T. Hattori found that the length of a free aluminum particle is negatively related to the strength of the corresponding flashover field . Zhang Qiaogen focused on the free‐conducting particles on the surface of a GIS internal support insulator and studied the metal particles under the influence of defects and the effect of steep wave rising speed on the insulation performance of SF 6 under the insulation fault of free‐conducting particles.…”

Section: Introductionmentioning

confidence: 99%

SF₆ decomposition components under different metallic free‐conducting wire‐type particles in positive DC partial discharge

Cao

Tang

Zhou

et al. 2018

IEEJ Transactions Elec Engng

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This study aimed to explore the common free‐conducting wire‐type particles that can produce severe partial discharge (PD) in DC gas‐insulated equipment. The experiment was conducted on the SF6 positive DC PD experimental system to determine the influence of the free‐conducting wire‐type particles of three kinds of metal materials (aluminum, 18/8 stainless steel, and copper) on SF6 decomposition. The change rules of five main characteristic decomposition components, namely, CF4, CO2, SOF2, SO2F2, and SO2, under different free‐conducting metal particles were obtained using gas chromatography–mass spectrometry quantitative detection. No significant correlation was observed between the formation of CO2 and the kinds of metal materials; however, the kinds of metal materials significantly influenced the formation of the other four kinds of characteristic gases. The differences in the physical and chemical properties of the metal materials caused the different characteristics of SF6 positive DC PD decomposition under different free‐conducting metal wire‐type particles. Findings provide an experimental basis for the diagnosis of fault‐type positive DC SF6 gas‐insulated equipment. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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“…Research on discharge phenomena caused by particles inside GIS has been widely performed, focusing on breakdown initiated by particles [2][3][4], the firefly phenomenon [5,6], micro-gap discharge via particles located in proximity to the electrode [7], the characteristics of electric discharge via particles deposited on spacers [8][9][10], and movement of the particles around spacers [11]. Although discharge from a fixed needle electrode has been investigated in detail [12], there are few reports on the relationship between the movement of wire particles in an electric field and corona discharge occurring from the edges of particles.…”

Section: Introductionmentioning

confidence: 99%

Corona and micro‐gap discharge at a wire particle in precessional motion under a DC electric field

Kudo

Sugimoto

Higashiyama

2006

Electrical Engineering Japan

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SUMMARYA free wire particle located in an electric field between parallel plate electrodes manifests several motions: standing, precession on the electrode, crossing, and breakdown via the particle. During stable standing or precessional motion, the corona discharge inevitably occurs. To clarify the influence of discharge phenomenon on the behavior of the wire particle, the corona discharge characteristic of the particle in the precession was investigated experimentally in a DC electric field formed by parallel plate electrodes with a positive voltage applied to the upper electrode. The waveforms of the corona discharge current flowing through a 6-mm wire particle were measured under two conditions: when a free wire was in precession on the lower electrode and when a wire was fixed between the electrodes vertically with a spacing of less than 1 mm between the lower electrode and the bottom of the particle. From a comparison of the waveform of corona discharge occurring at the particle in precession with that of the fixed particle, it was found that both micro-gap discharge and negative corona occurred simultaneously only when the particle was in precession with a relatively small elevation angle. The particle was lifted up when the magnitude of the corona discharge current was decreased below about 15 µA.

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A study on effects of conducting particles in SF/sub 6/ gas and test methods for GIS

Cited by 49 publications

References 3 publications

Partial discharge monitoring system for CLP power strategic 400 kV GIS extension at black point power station

Partial discharge monitoring system for CLP power strategic 400 kV GIS extension at black point power station

SF₆ decomposition components under different metallic free‐conducting wire‐type particles in positive DC partial discharge

Corona and micro‐gap discharge at a wire particle in precessional motion under a DC electric field

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A study on effects of conducting particles in SF/sub 6/ gas and test methods for GIS

Cited by 49 publications

References 3 publications

Partial discharge monitoring system for CLP power strategic 400 kV GIS extension at black point power station

Partial discharge monitoring system for CLP power strategic 400 kV GIS extension at black point power station

SF6 decomposition components under different metallic free‐conducting wire‐type particles in positive DC partial discharge

Corona and micro‐gap discharge at a wire particle in precessional motion under a DC electric field

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SF₆ decomposition components under different metallic free‐conducting wire‐type particles in positive DC partial discharge