Journal
IET SCIENCE MEASUREMENT & TECHNOLOGY
Volume 13, Issue 6, Pages 767-782Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-smt.2018.5597
Keywords
electric breakdown; dielectric losses; dielectric loss measurement; permittivity; power apparatus; insulation testing; power system measurement; power system reliability; diagnostic challenges; dielectric loss assessment; sustainable electrical systems; high-voltage power apparatuses; electrical cable; transformer; electrical energy; generation end; consumer end; electrical stress; insulation system; constant threat; reliable operation; continual deterioration; complete breakdown; HV equipment; dielectric properties; electrical insulation; power systems; diagnostic assessment; dielectric loss measurement; regular monitoring; measurement instruments; dielectric loss interpretation; regular diagnosing; tan-delta measurement
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Funding
- Australian Research Council (ARC) [LP140100782]
- Australian Research Council [LP140100782] Funding Source: Australian Research Council
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In any sustainable electrical systems, various high-voltage (HV) power apparatuses such as electrical cable, transformer etc. play a pivotal role to transfer electrical energy from the generation end to the consumer end. The degradation due to electrical stress is very unlikely to avoid in operation. Prominently, the insulation system is mostly expected to be strong enough, and its degradation always provides a constant threat to the reliable operation. Moreover, the continual deterioration can gradually lead to the complete breakdown of HV equipment. To assess the overall dielectric properties, the regular monitoring/diagnosing of electrical insulation has a paramount importance in power systems. One of the potential tools for diagnostic assessment is the tan-delta (tan delta) measurement. Considering different aspects at various frequencies, this study elucidates a comprehensive review of tan delta measurement. First, a detailed review and explanation of multiple challenges associated with dielectric loss measurement are presented. Various dielectric losses, their contribution to tan delta, measurement techniques and their comparisons are also discussed. This study further reviews the analogy of different physical dipolar theories, modelling and a brief analysis of commercially available measurement instruments.
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