CN105319528A - Method for checking operation working condition of electric energy meter - Google Patents

Abstract

The invention discloses an efficient method for checking the operation working condition of an electric energy meter with a comprehensive and accurate checking result. The method comprises the following steps: acquiring basic information data of the electric energy meter and site operation data, classifying the acquired data, calculating an operation state value RM of the electric energy meter, and determining an actual operation state corresponding to an actual operation working condition value of the electric energy meter. The checking method is high in efficiency; the problem that equipment which operates normally fails due to an artificial reason; by the checking method, the primary current percentage, the primary voltage percentage, the primary load power factor, the voltage waveform aberration rate, the degree of unbalance of three-phase voltage, ambient temperature, and influence of the relative humidity of the environment on the electric energy meter are taken into consideration, so that comprehensive checking on the operation working condition of the electric energy meter can be realized, and the finally obtained checking result is accurate, comprehensive and high in reliability; the method is suitable for being popularized and applied in the technical field of evaluations on the states of gateway counting equipment.

Description

A kind of operating condition method of inspection of electric energy meter

Technical field

The present invention relates to energy metering equipment state assessment technology field, especially a kind of operating condition method of inspection of electric energy meter.

Background technology

In order to ensure that electric energy meter can normally run and the reliability of continuous data, usually need to carry out long-range estimation to the operating condition of electric energy meter, the existing electric energy meter operating condition method of inspection is mostly the mode adopting desk checking, the mode of desk checking needs a large amount of computation process of manually carrying out field test and complexity, inefficiency, secondly, manually when carrying out on-the-spot accuracy test to electric energy meter, repetitious operation being carried out to electric energy meter, causing the normal device fails run originally, there is larger potential faults, in addition, the existing electric energy meter operating condition method of inspection is only simple to be detected the equipment quality of electric energy meter, and the condition monitoring of electric energy meter is often out in the cold, and the impact that the fault of this part is brought is sometimes very larger, therefore, the existing electric energy meter operating condition method of inspection can not realize the complete examination of electric energy meter operating condition, cause the operating condition assay that finally draws inaccurate, and manual intervention easily makes mistakes and causes assay reliability low, accurately cannot grasp the operating condition dynamic security stability of electric energy electric energy meter, and then also cannot ensure each main electric energy meter safety, stable, accurate operation, shortage is dynamically followed the tracks of accident treatment information and is analyzed, Dynamic controlling can not be carried out to catastrophic failure.

Summary of the invention

Technical matters to be solved by this invention is to provide the high and operating condition method of inspection of the comprehensive and accurate electric energy meter of assay of a kind of efficiency.

The technical solution adopted for the present invention to solve the technical problems is: the operating condition method of inspection of this electric energy meter, comprises the following steps:

A, the basic information data collecting electric energy meter and on-the-spot service data;

B, data to be classified, data are divided into following two classes: electric energy meter basic information data, electric energy meter Monitoring Data;

C, calculate electric energy meter operating condition value R according to electric energy meter basic information data, electric energy meter Monitoring Data _u; By the electric energy meter operating condition value preset and the corresponding relation of running status, determine the actual motion state corresponding to actual operating mode value of electric energy meter.

Further, described electric energy meter operating condition value R _mfollowing formulae discovery is adopted to obtain:

And ω _mI+ ω _mU+ ω _mcos+ ω _mTHDU+ ω _mdU+ ω _mT+ ω _mH=1;

$E_{IM}=\left\{\begin{array}{cc}{I}_M,& 0\&le;I_M<1\\ 1,& 1\&le;I_M\&le;I_{Mmax}\\ 0,& I_M>I_{Mmax}\end{array}\right.,$ Wherein, I _mfor the primary current percentage value of electric energy meter, the primary current percentage value of electric energy meter refers to the ratio of the rated current of the electric energy meter primary current that on-line monitoring obtains and electric energy meter, I _mmaxfor the primary current number percent maximal value of electric energy meter;

$E_{UM}=\left\{\begin{array}{cc}1,& 0\&le;\left|{\mathrm{\&Delta;U}}_M\right|<0.5{\mathrm{\&Delta;U}}_{M\lim }\\ 1-\left(\right|{\mathrm{\&Delta;U}}_M|-0.5{\mathrm{\&Delta;U}}_{M\lim })/0.5{\mathrm{\&Delta;U}}_{M\lim }\&times;100\%,& 0.5{\mathrm{\&Delta;U}}_{M\lim }\&le;\left|{\mathrm{\&Delta;U}}_M\right|\&le;{\mathrm{\&Delta;U}}_{M\lim }\\ 0,& \left|{\mathrm{\&Delta;U}}_M\right|>{\mathrm{\&Delta;U}}_{M\lim }\end{array}\right.,$ Wherein Δ U _mfor the voltage deviation percentage value of electric energy meter, Δ U _mlimfor the voltage deviation limit value of electric energy meter; Δ U _m=U _m-1, U _mfor the primary voltage percentage value of electric energy meter, the primary voltage percentage value of electric energy meter refers to the ratio of the rated voltage of the electric energy meter primary voltage that on-line monitoring obtains and electric energy meter;

wherein, for a power-factor of load of electric energy meter, for the lower limit of a power-factor of load of electric energy meter;

$E_{THDU}=\left\{\begin{array}{cc}1,& 0\&le;{\mathrm{THD}}_U<0.5{\mathrm{THD}}_{U\lim }\\ 1-({\mathrm{THD}}_U-0.5{\mathrm{THD}}_{U\lim })/0.5{\mathrm{THD}}_{U\lim }\&times;100\%,& 0.5{\mathrm{THD}}_{U\lim }\&le;{\mathrm{THD}}_U\&le;{\mathrm{THD}}_{U\lim }\\ 0,& {\mathrm{THD}}_U>{\mathrm{THD}}_{Ulin}\end{array}\right.$ Wherein, THD _ufor the voltage-form distortion rate of electric energy meter, THD _ulimfor the higher limit of the voltage-form distortion rate of electric energy meter;

$E_{dU}=\left\{\begin{array}{cc}1,& 0\&le;d_U<0.5d_{U\lim }\\ 1-(d_U-0.5d_{U\lim })/0.5d_{U\lim }\&times;100\%,& 0.5d_{U\lim }\&le;d_U\&le;d_{U\lim }\\ 0,& d_U>d_{U\lim }\end{array}\right.,$ Wherein, d _ufor the non-equilibrium among three phase voltages of electric energy meter, d _ulimfor the higher limit of electric energy meter;

wherein, T _mambient temperature value residing for electric energy meter, T _mnfor the specified ambient temperature value of electric energy meter, C _tM1and C _tM2for temperature causes the rate of change coefficient of variation;

wherein, H _mambient humidity value residing for electric energy meter, H _mnfor the specified ambient humidity that electric energy meter requires, C _hMfor humidity causes the rate of change of variation.

Further, described weights ω _mI, ω _mU, ω _mcos, ω _mTHDU, ω _mdU, ω _mT, ω _mHadopt and determine with the following method, the method comprises the following steps:

G1, determine order relation: in select proportion maximum a type be designated as G ₁ ^*; Then the type selecting proportion maximum in six types of remainder is designated as G ₂ ^*; The type selecting proportion maximum in five types of remainder is designated as G ₃ ^*, the type selecting proportion maximum in four types of remainder is designated as G ₄ ^*, the type selecting proportion maximum in three types of remainder is designated as G ₅ ^*, the type selecting proportion maximum in two types of remainder is designated as G ₆ ^*, finally remaining type is designated as G ₇ ^*, its order relation is G ₁ ^*> G ₂ ^*> G ₃ ^*> G ₄ ^*> G ₅ ^*> G ₆ ^*> G ₇ ^*, wherein G ₁ ^*> G ₂ ^*represent type G ₁ ^*proportion be greater than or be not less than G ₂ ^*, determine E thus _iM, E _uM, e _tHDU, E _dU, E _tM, E _hMorder relation;

The ratio in judgement of g2, adjacent type proportion size: adjacent type G _k-1with G _kbetween the ratio G of proportion size _k-1/ G _k=η _k, k=7,6,5,4,3,2, according to G _k-1with G _kproportion size, η _kspan be 1.0-1.8;

G3, scale-up factor calculate: g2 step is drawn η _kvalue brings following formula into:

$\left\{\begin{array}{c}{\mathrm{\&omega;}}_m={(1+\underset{k=2}{\overset{m}{\&Sigma;}}\underset{i=k}{\overset{m}{\&Pi;}}{\mathrm{\&eta;}}_i)}^{-1}\\ {\mathrm{\&omega;}}_{k-1}={\mathrm{\&eta;}}_k{\mathrm{\&omega;}}_k,k=m,m-1,...,2\end{array}\right.$ Wherein, m=7

G can be calculated ₁, G ₂, G ₃, G ₄, G ₅, G ₆, G ₇weight vector ω=[ω ₁, ω ₂, ω ₃, ω ₄, ω ₅, ω ₆, ω ₇], ω ₁, ω ₂, ω ₃, ω ₄, ω ₅, ω ₆, ω ₇corresponding G ₁, G ₂, G ₃, G ₄, G ₅, G ₆, G ₇weights, just correspondence can draw ω according to the order relation determined _mI, ω _mU, ω _mcos, ω _mTHDU, ω _mdU, ω _mT, ω _mHvalue.

Beneficial effect of the present invention: the operating condition method of inspection of this electric energy meter, by collecting the basic information data of electric energy meter and on-the-spot service data, is classified to the data of collecting and calculates electric energy meter operating condition value R _mby the electric energy meter operating condition value preset and the corresponding relation of running status, determine the actual motion state corresponding to actual operating mode value of electric energy meter, this method of inspection is the running status by drawing electric energy meter to the analysis of data, without the need to manually carrying out field test, efficiency is high, secondly, decrease artificial intervention, there will not be because artificial origin causes the normal device fails run originally, equipment failure hidden danger is lower, moreover, this method of inspection considers primary current number percent, primary voltage number percent, a power-factor of load, voltage-form distortion rate, non-equilibrium among three phase voltages, environment temperature, envionmental humidity is on the impact of electric energy meter, the complete examination of electric energy meter operating condition can be realized, ensure that the operating condition assay finally drawn is accurate, comprehensively, reliability is high, accurately can grasp the dynamic security stability of electric energy electric energy meter operating condition, and then ensure each main electric energy meter safety, stable, accurate operation, can dynamically follow the tracks of accident treatment information and analyze, thus Dynamic controlling is carried out to catastrophic failure.

Embodiment

The operating condition method of inspection of electric energy meter of the present invention, comprises the following steps:

A, the basic information data collecting electric energy meter and on-the-spot service data; The basic information data of electric energy meter can be obtained by existing metering production scheduling platform (MDS), metering production scheduling platform (MDS) summarizes all Back ground Informations of the electric energy meter supply of material, when collecting the basic information data of electric energy meter, the related data that metering production scheduling platform stores only need be called; The on-the-spot service data of electric energy meter can be obtained by existing power information acquisition system, power information acquisition system can realize the collection monitoring of the Various types of data such as the metering electricity of electric energy meter, operating condition and logout, wherein, on-line monitoring and intelligent diagnostics module are by the compare of analysis of image data, event and data mining, the ruuning situation of electric energy meter is diagnosed and analyzes, the abnormal conditions such as Timeliness coverage electricity, load, when collecting the on-the-spot service data of electric energy meter, the related data that power information acquisition system gathers only need be called;

B, data to be classified, data are divided into following two classes: electric energy meter basic information data, electric energy meter Monitoring Data;

C, calculate electric energy meter operating condition value R according to electric energy meter basic information data, electric energy meter Monitoring Data _m; By the electric energy meter operating condition value preset and the corresponding relation of running status, determine the actual motion state corresponding to actual operating mode value of electric energy meter.

The corresponding relation of electric energy meter operating condition value and running status is as shown in the table:

The operating condition method of inspection of this electric energy meter, by collecting the basic information data of electric energy meter and on-the-spot service data, is classified to the data of collecting and calculates electric energy meter operating condition value R _mby the electric energy meter operating condition value preset and the corresponding relation of running status, determine the actual motion state corresponding to actual operating mode value of electric energy meter, this method of inspection is the running status by drawing electric energy meter to the analysis of data, without the need to manually carrying out field test, efficiency is high, secondly, decrease artificial intervention, there will not be because artificial origin causes the normal device fails run originally, equipment failure hidden danger is lower, moreover, this method of inspection considers primary current number percent, primary voltage number percent, a power-factor of load, voltage-form distortion rate, non-equilibrium among three phase voltages, environment temperature, envionmental humidity is on the impact of electric energy meter, the complete examination of electric energy meter operating condition can be realized, ensure that the operating condition assay finally drawn is accurate, comprehensively, reliability is high, accurately can grasp the dynamic security stability of electric energy electric energy meter operating condition, and then ensure each main electric energy meter safety, stable, accurate operation, can dynamically follow the tracks of accident treatment information and analyze, thus Dynamic controlling is carried out to catastrophic failure.

Described electric energy meter operating condition value R _mfollowing formulae discovery is adopted to obtain:

And ω _mI+ ω _mU+ ω _mcos+ ω _mTHDU+ ω _mdU+ ω _mT+ ω _mH=1;

$E_{IM}=\left\{\begin{array}{cc}{I}_M,& 0\&le;I_M<1\\ 1,& 1\&le;I_M\&le;I_{Mmax}\\ 0,& I_M>I_{Mmax}\end{array}\right.,$ Wherein, I _mfor the primary current percentage value of electric energy meter, the primary current percentage value of electric energy meter refers to the ratio of the rated current of the electric energy meter primary current that on-line monitoring obtains and electric energy meter, I _mmaxfor the primary current number percent maximal value of electric energy meter, its maximal value is 120%;

$E_{UM}=\left\{\begin{array}{cc}1,& 0\&le;\left|{\mathrm{\&Delta;U}}_M\right|<0.5{\mathrm{\&Delta;U}}_{M\lim }\\ 1-\left(\right|{\mathrm{\&Delta;U}}_M|-0.5{\mathrm{\&Delta;U}}_{M\lim })/0.5{\mathrm{\&Delta;U}}_{M\lim }\&times;100\%,& 0.5{\mathrm{\&Delta;U}}_{M\lim }\&le;\left|{\mathrm{\&Delta;U}}_M\right|\&le;{\mathrm{\&Delta;U}}_{M\lim }\\ 0,& \left|{\mathrm{\&Delta;U}}_M\right|>{\mathrm{\&Delta;U}}_{M\lim }\end{array}\right.,$ Wherein Δ U _mfor the voltage deviation percentage value of electric energy meter, Δ U _mlimfor the voltage deviation limit value of electric energy meter, its voltage deviation limit value is ± 5%; Δ U _m=U _m-1, U _mfor the primary voltage percentage value of electric energy meter, the primary voltage percentage value of electric energy meter refers to the ratio of the rated voltage of the electric energy meter primary voltage that on-line monitoring obtains and electric energy meter;

wherein, for a power-factor of load of electric energy meter, for the lower limit of a power-factor of load of electric energy meter, its lower limit is 0.5;

$E_{THDU}=\left\{\begin{array}{cc}1,& 0\&le;{\mathrm{THD}}_U<0.5{\mathrm{THD}}_{U\lim }\\ 1-({\mathrm{THD}}_U-0.5{\mathrm{THD}}_{U\lim })/0.5{\mathrm{THD}}_{U\lim }\&times;100\%,& 0.5{\mathrm{THD}}_{U\lim }\&le;{\mathrm{THD}}_U\&le;{\mathrm{THD}}_{U\lim }\\ 0,& {\mathrm{THD}}_U>{\mathrm{THD}}_{U\lim }\end{array}\right.,$ Wherein, THD _ufor the voltage-form distortion rate of electric energy meter, THD _ulimfor the higher limit of the voltage-form distortion rate of electric energy meter, its higher limit is 5%;

$E_{dU}=\left\{\begin{array}{cc}1,& 0\&le;d_U<0.5d_{U\lim }\\ 1-(d_U-0.5d_{U\lim })/0.5d_{U\lim }\&times;100\%,& 0.5d_{U\lim }\&le;d_U\&le;d_{U\lim }\\ 0,& d_U>d_{U\lim }\end{array}\right.,$ Wherein, d _ufor the non-equilibrium among three phase voltages of electric energy meter, d _ulimfor the higher limit of electric energy meter, its higher limit is 4%;

wherein, T _mambient temperature value residing for electric energy meter, T _mnfor the specified ambient temperature value of electric energy meter, C _tM1and C _tM2for temperature causes the rate of change coefficient of variation; According to electric power mutual-inductor JJG1021-2007 standard verification, the electric energy meter error change that environment temperature independent role causes is no more than fundamental error limit value 1/4, and in test condition, temperature range is-25 ~ 55 DEG C, at rated temperature T _mnunder the variation that causes close to 0, and when temperature far exceeds the upper limit, lower range, its change caused close to fundamental error limit value 1/4, specified environment temperature T _mnbe 25 DEG C, C _tM1and C _tM2for temperature causes the rate of change coefficient of variation, get C respectively _tM1=2, C _tM2=3;

wherein, H _mambient humidity value residing for electric energy meter, H _mnfor the specified ambient humidity that electric energy meter requires, C _hMfor humidity causes the rate of change of variation, 95% is not more than according to regulation envionmental humidity in electric power mutual-inductor JJG1021-2007 standard verification, the electric energy meter error change that ambient humidity independent role causes is no more than fundamental error limit value 1/8, when ambient humidity is less than specified humidity H _mnin time, is deteriorated accordingly close to 0, specified ambient humidity H _mnbe 65%, humidity causes the rate of change C of variation _hMbe 5%.

The electric energy meter operating condition value R utilizing said method to calculate _maccurately, comprehensively, reliability is high, accurately can grasp the operating condition dynamic security stability of electric energy meter, and then ensure electric energy meter safety, stable, accurately run, can electric energy meter accident treatment information dynamically be followed the tracks of and be analyzed, thus Dynamic controlling is carried out to voltage transformer (VT) catastrophic failure.

In the above-described embodiment, described weights ω _mI, ω _mU, ω _mcos, ω _mTHDU, ω _mdU, ω _mT, ω _mHclassical layer fractional analysis can be adopted to draw, but this method not easily constructs the differentiation battle array meeting coherence request, therefore, the invention provides a kind of simple effective method to determine weights ω _mI, ω _mU, ω _mcos, ω _mTHDU, ω _mdU, ω _mT, ω _mH, the method comprises the following steps:

G1, determine order relation: in select proportion maximum a type be designated as G ₁ ^*; Then the type selecting proportion maximum in six types of remainder is designated as G ₂ ^*; The type selecting proportion maximum in five types of remainder is designated as G ₃ ^*, the type selecting proportion maximum in four types of remainder is designated as G ₄ ^*, the type selecting proportion maximum in three types of remainder is designated as G ₅ ^*, the type selecting proportion maximum in two types of remainder is designated as G ₆ ^*, finally remaining type is designated as G ₇ ^*, its order relation is G ₁ ^*> G ₂ ^*> G ₃ ^*> G ₄ ^*> G ₅ ^*> G ₆ ^*> G ₇ ^*, wherein G ₁ ^*> G ₂ ^*represent type G ₁ ^*proportion be greater than or be not less than G ₂ ^*, determine E thus _iM, E _uM, e _tHDU, E _dU, E _tM, E _hMorder relation;

The ratio in judgement of g2, adjacent type proportion size: adjacent type G _k-1with G _kbetween the ratio G of proportion size _k-1/ G _k=η _k, k=7,6,5,4,3,2, according to G _k-1with G _kproportion size, η _kspan be 1.0-1.8; η _kthe value rule judged is as described below:

G3, scale-up factor calculate: g2 step is drawn η _kvalue brings following formula into:

$\left\{\begin{array}{c}{\mathrm{\&omega;}}_m={(1+\underset{k=2}{\overset{m}{\&Sigma;}}\underset{i=k}{\overset{m}{\&Pi;}}{\mathrm{\&eta;}}_i)}^{-1}\\ {\mathrm{\&omega;}}_{k-1}={\mathrm{\&eta;}}_k{\mathrm{\&omega;}}_k,k=m,m-1,...,2\end{array}\right.$ Wherein, m=7

G can be calculated ₁, G ₂, G ₃, G ₄, G ₅, G ₆, G ₇weight vector ω=[ω ₁, ω ₂, ω ₃, ω ₄, ω ₅, ω ₆, ω ₇], ω ₁, ω ₂, ω ₃, ω ₄, ω ₅, ω ₆, ω ₇corresponding G ₁, G ₂, G ₃, G ₄, G ₅, G ₆, G ₇weights, just correspondence can draw ω according to the order relation determined _mI, ω _mU, ω _mcos, ω _mTHDU, ω _mdU, ω _mT, ω _mHvalue.

The weights utilizing said method to draw more tally with the actual situation the primary current number percent of middle electric energy meter, primary voltage number percent, power-factor of load, voltage-form distortion rate, non-equilibrium among three phase voltages, environment temperature, proportion shared by envionmental humidity, can make finally to draw that the operating condition state value of electric energy meter conforms to more with actual operating condition state, its matching degree and accuracy higher.

Claims (3)

1. an operating condition method of inspection for electric energy meter, is characterized in that comprising the following steps:

A, the basic information data collecting electric energy meter and on-the-spot service data;

B, data to be classified, data are divided into following two classes: electric energy meter basic information data, electric energy meter Monitoring Data;

C, calculate electric energy meter operating condition value R according to electric energy meter basic information data, electric energy meter Monitoring Data _m, by the electric energy meter operating condition value preset and the corresponding relation of running status, determine the actual motion state corresponding to actual operating mode value of electric energy meter.

2. the operating condition method of inspection of electric energy meter as claimed in claim 1, is characterized in that: described electric energy meter operating condition value R _mfollowing formulae discovery is adopted to obtain:

And ω _mI+ ω _mU+ ω _mcos+ ω _mTHDU+ ω _mdU+ ω _mT+ ω _mH=1;

$E_{IM}=\left\{\begin{array}{cc}{I}_M,& 0\&le;I_M<1\\ 1,& 1\&le;I_M\&le;I_{Mmax}\\ 0,& I_M>I_{Mmax}\end{array}\right.,$ Wherein, I _mfor the primary current percentage value of electric energy meter, the primary current percentage value of electric energy meter refers to the ratio of the rated current of the electric energy meter primary current that on-line monitoring obtains and electric energy meter, I _mmaxfor the primary current number percent maximal value of electric energy meter;

$E_{UM}=\left\{\begin{array}{cc}1,& 0\&le;\left|{\mathrm{\&Delta;U}}_M\right|<0.5{\mathrm{\&Delta;U}}_{M\lim }\\ 1-\left(\right|{\mathrm{\&Delta;U}}_M|-0.5{\mathrm{\&Delta;U}}_{M\lim })/0.5{\mathrm{\&Delta;U}}_{M\lim }\&times;100\%,& 0.5{\mathrm{\&Delta;U}}_{M\lim }\&le;\left|{\mathrm{\&Delta;U}}_M\right|\&le;{\mathrm{\&Delta;U}}_{M\lim }\\ 0,& \left|{\mathrm{\&Delta;U}}_M\right|>{\mathrm{\&Delta;U}}_{M\lim }\end{array}\right.,$ Wherein Δ U _mfor the voltage deviation percentage value of electric energy meter, Δ U _mlimfor the voltage deviation limit value of electric energy meter; Δ U _m=U _m-1, U _mfor the primary voltage percentage value of electric energy meter, the primary voltage percentage value of electric energy meter refers to the ratio of the rated voltage of the electric energy meter primary voltage that on-line monitoring obtains and electric energy meter;

wherein, for a power-factor of load of electric energy meter, for the lower limit of a power-factor of load of electric energy meter;

$E_{THDU}=\left\{\begin{array}{cc}1,& 0\&le;{\mathrm{THD}}_U<0.5{\mathrm{THD}}_{U\lim }\\ 1-({\mathrm{THD}}_U-0.5{\mathrm{THD}}_{U\lim })/0.5{\mathrm{THD}}_{U\lim }\&times;100\%,& 0.5{\mathrm{THD}}_{Ulin}\&le;{\mathrm{THD}}_U\&le;{\mathrm{THD}}_{U\lim }\\ 0,& {\mathrm{THD}}_U>{\mathrm{THD}}_{U\lim }\end{array}\right.,$ Wherein, THD _ufor the voltage-form distortion rate of electric energy meter, THD _ulimfor the higher limit of the voltage-form distortion rate of electric energy meter;

$E_{dU}=\left\{\begin{array}{cc}1,& 0\&le;d_U<0.5d_{U\lim }\\ 1-(d_U-0.5d_{U\lim })/0.5d_{U\lim }\&times;100\%,& 0.5d_{U\lim }\&le;d_U\&le;d_{U\lim }\\ 0,& d_U>d_{U\lim }\end{array}\right.,$ Wherein, d _ufor the non-equilibrium among three phase voltages of electric energy meter, d _ulimfor the higher limit of electric energy meter;

wherein, T _mambient temperature value residing for electric energy meter, T _mnfor the specified ambient temperature value of electric energy meter, C _tM1and C _tM2for temperature causes the rate of change coefficient of variation;

wherein, H _mambient humidity value residing for electric energy meter, H _mnfor the specified ambient humidity that electric energy meter requires, C _hMfor humidity causes the rate of change of variation.

3. the operating condition method of inspection of electric energy meter as claimed in claim 2, is characterized in that: described weights ω _mI, ω _mU, ω _mcos, ω _mTHDU, ω _mdU, ω _mT, ω _mHadopt and determine with the following method, the method comprises the following steps:

G1, determine order relation: at { E _iM, E _uM, e _tHDU, E _dU, E _tM, E _hMin select proportion maximum a type be designated as G ₁ ^*; Then the type selecting proportion maximum in six types of remainder is designated as G ₂ ^*; The type selecting proportion maximum in five types of remainder is designated as G ₃ ^*, the type selecting proportion maximum in four types of remainder is designated as G ₄ ^*, the type selecting proportion maximum in three types of remainder is designated as G ₅ ^*, the type selecting proportion maximum in two types of remainder is designated as G ₆ ^*, finally remaining type is designated as G ₇ ^*, its order relation is G ₁ ^*> G ₂ ^*> G ₃ ^*> G ₄ ^*> G ₅ ^*> G ₆ ^*> G ₇ ^*, wherein G ₁ ^*> G ₂ ^*represent type G ₁ ^*proportion be greater than or be not less than G ₂ ^*, determine E thus _iM, E _uM, e _tHDU, E _dU, E _tM, E _hMorder relation;

The ratio in judgement of g2, adjacent type proportion size: adjacent type G _k-1with G _kbetween the ratio G of proportion size _k-1/ G _k=η _k, k=7,6,5,4,3,2, according to G _k-1with G _kproportion size, η _kspan be 1.0-1.8;

G3, scale-up factor calculate: g2 step is drawn η _kvalue brings following formula into:

$\left\{\begin{array}{c}{\mathrm{\&omega;}}_m={\left(1+\underset{k=2}{\overset{m}{\&Sigma;}}\underset{i=k}{\overset{m}{\&Pi;}}{\mathrm{\&eta;}}_i\right)}^{-1}\\ {\mathrm{\&omega;}}_{k-1}={\mathrm{\&eta;}}_k{\mathrm{\&omega;}}_k,k=m,m-1,...,2\end{array}\right.$ Wherein, m=7

G can be calculated ₁, G ₂, G ₃, G ₄, G ₅, G ₆, G ₇weight vector ω=[ω ₁, ω ₂, ω ₃, ω ₄, ω ₅, ω ₆, ω ₇], ω ₁, ω ₂, ω ₃, ω ₄, ω ₅, ω ₆, ω ₇corresponding G ₁, G ₂, G ₃, G ₄, G ₅, G ₆, G ₇weights, just correspondence can draw ω according to the order relation determined _mI, ω _mU, ω _mcos, ω _mTHDU, ω _mdU, ω _mT, ω _mHvalue.