Failure analysis of composite dielectric of power capacitors in distribution systems

Farag, A.S.; Wang, C.; Cheng, T.C.; Zheng, Guoxiong; Du, Y.; Hu, Lei; Palk, B.; Moon, M.

doi:10.1109/94.708276

Cited by 43 publications

(13 citation statements)

References 7 publications

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“…To solve these problems, power substations or power consumers generally install ac power capacitors or an automatic power factor regulator for the distribution power system [1]- [3], thus compensating the reactive power to increase the power factor of overall system. In most distribution power systems, the capacity of applied ac power capacitor is about 25%-35% of the total capacity, and in other distribution power systems it even exceeds 50%, according previous reports [4].…”

Section: Introductionmentioning

confidence: 69%

Hybrid switch to suppress the inrush current of AC power capacitor

2005

IEEE Trans. Power Delivery

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This paper proposes a hybrid switch to suppress the inrush current of an ac power capacitor. This hybrid switch consists of a thyristor switch and an electromagnetic switch connected in parallel. The thyristor switch is used as an auxiliary switch during the transient state of turning on and turning off the ac power capacitor, and the electromagnetic switch is used as the main switch in the steady state. The proposed hybrid switch can avoid the inrush current of the ac power capacitor in the process of turning on and avoid the electrical arc in the process of turning off. The current rating of the thyristor switch and the electromagnetic switch used in the proposed hybrid switch is very small compared with a conventional thyristor switch or an electromagnetic switch used for switching ac power capacitor individually. Moreover, the proposed hybrid switch can extend the life of the ac power capacitor and the electromagnetic switch. A prototype is developed to demonstrate its performance. The test results show that the proposed hybrid switch module for ac power capacitor has the expected performance.

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Section: Introductionmentioning

confidence: 69%

Hybrid switch to suppress the inrush current of AC power capacitor

2005

IEEE Trans. Power Delivery

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“…The parameters can be obtained from linear curve fitting as described by Equation (2). y=Mx-A (2) where y=InIn{1/[1-F(t)} and x=lnt.…”

Section: Methods For Estimating Reliability Parametersmentioning

confidence: 99%

“…In a power distribution system, protective devices including breakers, reclosers, fuses and switches (disconnecting, airbreak and loadbreak switches) are considered very important because their operating conditions directly affect the reliability, security and economics of the system. [2] In this paper, all protective devices including 27 breakers, 109 reclosers, 2151 fuses and 79 switches operated in the 22 kV distribution system of the Provincial Electricity Authority (PEA) of Thailand during the period from 1997 to 2005 have been analyzed for reliability purpose.…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of Protective Devices in Power Distribution Systems for Reliability Purpose

Tippachon

Boonruang

Boonpun

et al. 2006

TENCON 2006 - 2006 IEEE Region 10 Conference

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“…According to the classification of failure data in Tab II, the failure infonnation ofHVDC protection devices SD in CS G is shown in Tab ID. (9) The aging failure data is fitted by linear regression for Weibull distribution fimction. Its results shows that the parameters for the Weibull distribution are 8=1195, m=O.8204.…”

Section: Tfr Es Timationmentioning

confidence: 99%

“…[8], with the Weibull probability distribution, as used in the capa citors, oil circuit breakers, transformers and insulators are given by probability statistics method in Ref. [9]. However, the above results are focus on the relays for AC high voltage power network, but not including the relays for HYDC.…”

Section: Introductionmentioning

confidence: 99%

Researches on the time-varying failure rate characteristic for the HVDC protection devices in China Southern Power Grid

Cao

Wang

Bao

et al. 2011

2011 International Conference on Advanced Power System Automation and Protection

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In China Southern Power Grid (CSG), the SIMADYN D (SD) of SIEMENS plays an important role for the HYDC protection system. Based on the field failure data of SD, this paper studies the time-varying failure rate (TFR) characteristic for the protection devices of HYDC in the CSG According to the concept of TFR, failure mode is divided into two types, one is the aging failure and the other is the random failure. According to the above failure classification, the failure characte ristic of different modules is also discussed.

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Failure analysis of composite dielectric of power capacitors in distribution systems

Cited by 43 publications

References 7 publications

Hybrid switch to suppress the inrush current of AC power capacitor

Hybrid switch to suppress the inrush current of AC power capacitor

Failure Analysis of Protective Devices in Power Distribution Systems for Reliability Purpose

Researches on the time-varying failure rate characteristic for the HVDC protection devices in China Southern Power Grid

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