Harmonic-factor-based electronic electric energy meter reliability prediction method
A technology of harmonic factor and electric energy meter, applied in the direction of calculation, electric digital data processing, special data processing application, etc., can solve the problems affecting power quality, voltage distortion, power grid harmonic pollution, etc.
Inactive Publication Date: 2014-01-01
JIANGSU INST OF METROLOGY
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Problems solved by technology
[0003] With the wide application of various non-linear electrical equipment, there is a serious problem of harmonic pollution in the power grid, causing voltage distortion, which in turn has adverse effects on various electrical equipment, and has become a problem that affects power quality in current power systems public nuisance
However, the influence of grid voltage harmonics on the reliability life of electric energy meters is not considered in the current reliability prediction of electric energy meters. Therefore, the current reliability prediction method of electric energy meters has certain deficiencies, and it is necessary to propose a The reliability prediction method of the electronic energy meter, so as to improve the accuracy of the reliability prediction of the electric energy meter
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[0047] The present invention will be described in further detail below in conjunction with specific embodiments.
[0048]Embodiment, the first step: Aiming at the DDZY71 single-phase cost-controlled smart energy meter provided by a certain company with an average life of 10 years, the aging statistical test of the energy meter is carried out, and the actual use environment of each energy meter in the presence of grid voltage harmonics is tested respectively. (environment I) aging test data (z 1 ,λ 1 , τ 1 ), the aging test data of the energy meter in the laboratory environment (environment II) without grid voltage harmonics (z 2 ,λ 2 , τ 2 ).
[0049] Take the confidence degree γ=0.5, and determine the confidence interval of the environmental factor K [K L , K U ],
[0050] K L =1, K U =1.34;
[0051] Calculate the experimental data according to formulas (2) and (3), and get:
[0052] When the grid voltage harmonic content is 1% to 3%, the arithmetic mean value of ...
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The invention discloses a harmonic-factor-based electronic electric energy meter reliability prediction method. The method comprises the following steps: solving environmental factors K and an average value thereof in confidence intervals of electric energy meters through experimental data, thereby determining harmonic factors pi h of the electric energy meters; determining an electric energy meter total failure rate lambda considering the harmonic factors according to the harmonic factors pi h and an electric energy meter total failure rate lambda s not considering the harmonic factors, thereby acquiring the electric energy meter expected service life T considering the harmonic factors. The method is simple and efficient; the harmonic-factor-based electronic electric energy meter reliability prediction method is provided by considering the influence of electrical network harmonic waves in an electric energy meter service life prediction process, so that the prediction accuracy of the electric energy meter service life is effectively improved; the method has an important theoretical value and a broad engineering practical value.
Description
technical field [0001] The invention relates to a method for predicting the reliability of an electronic electric energy meter based on a harmonic factor, and belongs to the technical field of safety and reliability of electronic equipment. technical background [0002] At present, electronic energy meters are widely used in power systems, and their reliability level has attracted more and more attention from all walks of life. The reliability of electronic watt-hour meters is expected to have developed to a certain extent. At present, it is mainly based on the failure rate of the components and parts selected in its design, combined with technical design, manufacturing process, and electrical stress on the device. And factors such as the use environment of the electric energy meter to predict the reliability of the electronic electric energy meter. Therefore, the environmental factor is a very important parameter, and it is widely used in reliability engineering. [0003]...
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IPC IPC(8): G06F19/00
Inventor 李林马宇明高佳郭青龙颜伟
Owner JIANGSU INST OF METROLOGY