Regions of electrical stress in high voltage capacitor units

Research output: Contribution to conferencePoster

Abstract

As electrical systems develop, and power electronic converter interfaces proliferate, greater reliance is placed on the capacitor units which comprise them. For such applications, resilience to electrical stresses is essential to capacitor unit design, as electrical field stresses can degrade insulation and cultivate incipient faults. Left unchecked, insulation can breakdown and cause an associated reduction in capacitance, an increased reactance, and subsequently greater electric field stresses and susceptibility to further ‘cascading’ failures. COMSOL Multiphysics’® AC/DC module is used in this study to emulate electric field stresses throughout a simplified capacitor unit. Regions of electrical field stress are highlighted using an electrostatics boundary condition so that: their impact and implications for fault progression can be considered for engineering design; and to inform maintenance activities of where degradation is anticipated. While this study uses a simplistic capacitor model of homogenous dielectric, few winding turns, and omits noise inherent to real applications, it could offer limited insight into physical influences within enclosed assets which are presently becoming increasingly pervasive in electrical infrastructure. Configurability is also discussed as a means to enable study of alternative designs.

Conference

ConferenceCOMSOL Conference 2019
CountryUnited Kingdom
CityCambridge
Period24/09/1926/09/19
Internet address

Fingerprint

Capacitors
Electric potential
Insulation
Electric fields
Power electronics
Electrostatics
Capacitance
Boundary conditions
Degradation

Keywords

  • capacitors
  • electrical power systems
  • high voltage capacitor units

Cite this

Mackinnon, C., & Stewart, B. G. (2019). Regions of electrical stress in high voltage capacitor units. Poster session presented at COMSOL Conference 2019, Cambridge, United Kingdom.
Mackinnon, Calum ; Stewart, Brian G. / Regions of electrical stress in high voltage capacitor units. Poster session presented at COMSOL Conference 2019, Cambridge, United Kingdom.7 p.
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abstract = "As electrical systems develop, and power electronic converter interfaces proliferate, greater reliance is placed on the capacitor units which comprise them. For such applications, resilience to electrical stresses is essential to capacitor unit design, as electrical field stresses can degrade insulation and cultivate incipient faults. Left unchecked, insulation can breakdown and cause an associated reduction in capacitance, an increased reactance, and subsequently greater electric field stresses and susceptibility to further ‘cascading’ failures. COMSOL Multiphysics’{\circledR} AC/DC module is used in this study to emulate electric field stresses throughout a simplified capacitor unit. Regions of electrical field stress are highlighted using an electrostatics boundary condition so that: their impact and implications for fault progression can be considered for engineering design; and to inform maintenance activities of where degradation is anticipated. While this study uses a simplistic capacitor model of homogenous dielectric, few winding turns, and omits noise inherent to real applications, it could offer limited insight into physical influences within enclosed assets which are presently becoming increasingly pervasive in electrical infrastructure. Configurability is also discussed as a means to enable study of alternative designs.",
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Mackinnon, C & Stewart, BG 2019, 'Regions of electrical stress in high voltage capacitor units' COMSOL Conference 2019, Cambridge, United Kingdom, 24/09/19 - 26/09/19, .

Regions of electrical stress in high voltage capacitor units. / Mackinnon, Calum; Stewart, Brian G.

2019. Poster session presented at COMSOL Conference 2019, Cambridge, United Kingdom.

Research output: Contribution to conferencePoster

TY - CONF

T1 - Regions of electrical stress in high voltage capacitor units

AU - Mackinnon, Calum

AU - Stewart, Brian G.

N1 - Paper was submitted and was also presented as a poster at the conference.

PY - 2019/9/24

Y1 - 2019/9/24

N2 - As electrical systems develop, and power electronic converter interfaces proliferate, greater reliance is placed on the capacitor units which comprise them. For such applications, resilience to electrical stresses is essential to capacitor unit design, as electrical field stresses can degrade insulation and cultivate incipient faults. Left unchecked, insulation can breakdown and cause an associated reduction in capacitance, an increased reactance, and subsequently greater electric field stresses and susceptibility to further ‘cascading’ failures. COMSOL Multiphysics’® AC/DC module is used in this study to emulate electric field stresses throughout a simplified capacitor unit. Regions of electrical field stress are highlighted using an electrostatics boundary condition so that: their impact and implications for fault progression can be considered for engineering design; and to inform maintenance activities of where degradation is anticipated. While this study uses a simplistic capacitor model of homogenous dielectric, few winding turns, and omits noise inherent to real applications, it could offer limited insight into physical influences within enclosed assets which are presently becoming increasingly pervasive in electrical infrastructure. Configurability is also discussed as a means to enable study of alternative designs.

AB - As electrical systems develop, and power electronic converter interfaces proliferate, greater reliance is placed on the capacitor units which comprise them. For such applications, resilience to electrical stresses is essential to capacitor unit design, as electrical field stresses can degrade insulation and cultivate incipient faults. Left unchecked, insulation can breakdown and cause an associated reduction in capacitance, an increased reactance, and subsequently greater electric field stresses and susceptibility to further ‘cascading’ failures. COMSOL Multiphysics’® AC/DC module is used in this study to emulate electric field stresses throughout a simplified capacitor unit. Regions of electrical field stress are highlighted using an electrostatics boundary condition so that: their impact and implications for fault progression can be considered for engineering design; and to inform maintenance activities of where degradation is anticipated. While this study uses a simplistic capacitor model of homogenous dielectric, few winding turns, and omits noise inherent to real applications, it could offer limited insight into physical influences within enclosed assets which are presently becoming increasingly pervasive in electrical infrastructure. Configurability is also discussed as a means to enable study of alternative designs.

KW - capacitors

KW - electrical power systems

KW - high voltage capacitor units

UR - https://uk.comsol.com/conference/cambridge

M3 - Poster

ER -

Mackinnon C, Stewart BG. Regions of electrical stress in high voltage capacitor units. 2019. Poster session presented at COMSOL Conference 2019, Cambridge, United Kingdom.