Method of comprehensively estimating reliability of single-phase intelligent electric energy meter

Abstract

The invention discloses a method of comprehensively estimating reliability of a single-phase intelligent electric energy meter in a full life cycle. The reliability level of the intelligent electric energy meter is decided by design research, production, manufacturing, test, detection, operation, maintenance and other steps, and present reliability predication and reliability test are only based on a certain step. According to the method of the invention, reliability estimation on the intelligent electric energy meter is carried out from five aspects: reliability predication, initial reliability estimation, reliability test, accelerated degradation test and field data analysis, the life cycle of the electric energy meter is covered thoroughly, and a quantitative calculation method for determining two important time points for failure rate changes for a position of a dividing point between an early failure period and an accidental failure period and a position of a dividing point between an accidental failure period and a loss failure period on a failure curve.

Description

technical field [0001] The invention relates to a method for comprehensively evaluating the reliability of a residential single-phase intelligent electric energy meter. It belongs to the technical field of measurement equipment operation verification and detection. Background technique [0002] With economic development and scientific and technological progress, the structure and function of smart energy meters, as a part of my country's smart grid construction project terminal, have become more and more complex. According to the plan of State Grid, 230 million smart meters will be installed in 2015. Whether such a large number of metering meters is stable and reliable will directly affect the vital interests of the people and the harmony and stability of the society. The reliability evaluation of smart energy meters involves multiple life links such as pre-production design, production process, bidding acceptance, and on-site operation, and each link will affect the relia...

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Problems solved by technology

[0004] The present invention is aimed at the problems that the existing reliability research method of the smart electric energy meter can only be carried out at a single point, the single-phase meter rotation strategy is inflexible and not pertinent, and the existing reliability test standard only cares about the failure of the whole electric energy meter. Reliability prediction, preliminary reliability evaluation, reliability verification test, accelerated degradation test, combined with field operation data and other aspects of reliability level information, constantly approaching and correcting the failure rate curve (bathtub curve) of the smart energy meter to carry out A method for evaluating the reliability level of smart electric energy meters in the whole life cycle

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