CN105319528B - A kind of operating condition method of inspection of electric energy meter - Google Patents
A kind of operating condition method of inspection of electric energy meter Download PDFInfo
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Abstract
The invention discloses the operating condition method of inspection of the comprehensive and accurate electric energy meter of a kind of efficient and inspection result.The method of inspection classifies the data of collection and calculates electric energy meter operating status value R by collecting the basic information data and field operational data of electric energy meterM, pass through the correspondence of default electric energy meter operating condition value and operating status, determine the actual motion state corresponding to the actual operating mode value of electric energy meter, the method of inspection is efficient, be not in since artificial origin causes the device fails of script normal operation, the method of inspection considers primary current percentage, primary voltage percentage, power-factor of load, voltage-form distortion rate, non-equilibrium among three phase voltages, environment temperature, influence of the envionmental humidity to electric energy meter, it can realize the complete examination of electric energy meter operating condition, the inspection result that guarantee is finally drawn is accurate, comprehensively, reliability is high.It is adapted to promote and apply in energy metering equipment state assessment technical field.
Description
Technical Field
The invention relates to the technical field of state evaluation of gateway metering equipment, in particular to a method for testing the operation condition of an electric energy meter.
Background
In order to ensure the normal operation of the electric energy meter and the reliability of the metering data of the electric energy meter, the operation condition of the electric energy meter is usually estimated remotely, most of the existing methods for detecting the operation condition of the electric energy meter adopt a manual detection mode, the manual detection mode needs a large amount of manual work to carry out field detection and a complex calculation process, and the working efficiency is low; secondly, when the electric energy meter is manually tested on site precision, the electric energy meter is repeatedly operated for many times, so that the equipment which normally runs originally fails, and larger hidden trouble exists; in addition, the existing method for inspecting the operation condition of the electric energy meter only simply detects the quality of equipment of the electric energy meter, the operation state of the electric energy meter is often ignored, and the influence caused by the fault is sometimes very large, so that the existing method for inspecting the operation condition of the electric energy meter cannot realize the comprehensive inspection of the operation condition of the electric energy meter, the finally obtained inspection result of the operation condition is inaccurate, the manual intervention is easy to make mistakes, the reliability of the inspection result is low, the dynamic safety and stability of the operation condition of the electric energy meter cannot be accurately mastered, the safe, stable and accurate operation of each main electric energy meter cannot be further ensured, the dynamic tracking and analysis of accident handling information is lacked, and the dynamic control of serious faults cannot be carried out.
Disclosure of Invention
The invention aims to provide the method for testing the operation condition of the electric energy meter, which has high efficiency and comprehensive and accurate test result.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for checking the operation condition of the electric energy meter comprises the following steps:
A. collecting basic information data and field operation data of the electric energy meter;
B. classifying the data, and classifying the data into the following two categories: basic information data of the electric energy meter and monitoring data of the electric energy meter;
C. according to the electric energy meter baseCalculating the running condition value R of the electric energy meter according to the basic information data and the monitoring data of the electric energy meterU(ii) a And determining the actual operation state corresponding to the actual operation condition value of the electric energy meter according to the preset corresponding relation between the operation condition value and the operation state of the electric energy meter.
Further, the electric energy meter operates the working condition value RMThe formula is as follows:
and omegaMI+ωMU+ωMcos+ωMTHDU+ωMdU+ωMT+ωMH＝1；
Wherein, IMThe primary current percentage value of the electric energy meter is the ratio of the primary current of the electric energy meter obtained by on-line monitoring to the rated current of the electric energy meter, IMmaxThe maximum value of the primary current percentage of the electric energy meter is obtained;
wherein Δ UMIs the voltage deviation percentage value, delta U, of the electric energy meterMlimThe voltage deviation limit value of the electric energy meter; delta UM＝UM-1，UMThe primary voltage percentage value of the electric energy meter is the ratio of the primary voltage of the electric energy meter obtained by on-line monitoring to the rated voltage of the electric energy meter;
wherein,is a primary load of an electric energy meterThe power-carrying factor of the power-carrying element,the lower limit value of the primary load power factor of the electric energy meter is obtained;
wherein, THDUFor the rate of distortion of the voltage waveform, THD, of electric energy metersUlimThe upper limit value of the distortion rate of the voltage waveform of the electric energy meter;
wherein d isUIs the three-phase voltage unbalance of the electric energy meter, dUlimThe upper limit value of the electric energy meter;
wherein, TMIs the ambient temperature value, T, of the electric energy meterMnIs the rated ambient temperature value, C, of the electric energy meterTM1And CTM2Coefficient of rate of change for temperature induced degradation;
wherein HMIs the environmental humidity value H of the electric energy meterMnRated ambient humidity, C, required for electric energy metersHMThe rate of change causing the deterioration for humidity.
Further, ω isMI、ωMU、ωMcos、ωMTHDU、ωMdU、ωMT、ωMHThe method is determined by adopting the following steps:
g1, determining order relation: in { EIM、EUM、ETHDU、EdU、ETM、EHMSelecting one type with the highest specific gravity as G1 *(ii) a Then selecting one type with the highest specific gravity from the remaining six types to be marked as G2 *(ii) a Selecting one type with the highest specific gravity from the rest five types as G3 *Selecting one type with the highest specific gravity from the rest four types as G4 *Selecting one type with the highest specific gravity from the rest three types as G5 *Selecting one type with the highest specific gravity from the rest two types as G6 *And the last remaining type is denoted as G7 *The order relationship is G1 *＞G2 *＞G3 *＞G4 *＞G5 *＞G6 *＞G7 *Wherein G is1 *＞G2 *Representation type G1 *Has a specific gravity of G or more2 *From this, E is determinedIM、EUM、ETHDU、EdU、ETM、EHMThe order relationship of;
g2, judging the ratio of the specific gravity of the adjacent types: adjacent type Gk-1 *And Gk *The ratio G of the specific gravity to the specific gravityk-1 */Gk *＝ηkK is 7, 6, 5, 4, 3, 2, according to Gk-1 *And Gk *Specific gravity of ηkThe value range of (A) is 1.0-1.8;
g3, calculating a proportionality coefficient, namely obtaining η by the step g2kThe values are substituted into the following equation:
then G can be calculated1 *、G2 *、G3 *、G4 *、G5 *、G6 *、G7 *The weight vector ω ═ ω1,ω2,ω3,ω4,ω5,ω6,ω7]，ω1,ω2,ω3,ω4,ω5,ω6,ω7Corresponds to G1 *、G2 *、G3 *、G4 *、G5 *、G6 *、G7 *The weight of (a) can be obtained according to the determined order relationMI、ωMU、ωMcos、ωMTHDU、ωMdU、ωMT、ωMHThe value of (c).
The invention has the beneficial effects that: the method for testing the operation condition of the electric energy meter classifies the collected data and calculates the operation condition value R of the electric energy meter by collecting the basic information data and the field operation data of the electric energy meterMThe actual running state corresponding to the actual running condition value of the electric energy meter is determined according to the preset corresponding relation between the running condition value and the running state of the electric energy meter, the running state of the electric energy meter is obtained through data analysis, manual field inspection is not needed, and the efficiency is high; secondly, manual intervention is reduced, the failure of the original normally-operated equipment caused by human reasons can not occur, and the hidden danger of equipment failure is low; furthermore, the method considers the influence of primary current percentage, primary voltage percentage, primary load power factor, voltage waveform distortion rate, three-phase voltage unbalance degree, environmental temperature and environmental relative humidity on the electric energy meter, can realize the comprehensive inspection of the operation condition of the electric energy meter, ensures that the finally obtained inspection result of the operation condition is accurate, comprehensive and high in reliability, can accurately master the dynamic safety and stability of the operation condition of the electric energy meter, and further ensures that each main electric energy meter is safe, stable and capable of measuring the voltage of the electric energy meter,The system can operate accurately, and can dynamically track and analyze accident handling information, thereby dynamically controlling serious faults.
Detailed Description
The invention relates to a method for checking the operation condition of an electric energy meter, which comprises the following steps:
A. collecting basic information data and field operation data of the electric energy meter; the basic information data of the electric energy meter can be obtained through the conventional metering production scheduling platform (MDS), the metering production scheduling platform (MDS) collects all basic information of electric energy meter supply, and when the basic information data of the electric energy meter is collected, only the related data stored by the metering production scheduling platform is needed to be called; the on-site operation data of the electric energy meter can be acquired by the existing power consumption information acquisition system, and the power consumption information acquisition system can realize the acquisition and monitoring of various data such as the metering power consumption, the operation working condition, the event record and the like of the electric energy meter, wherein the on-line monitoring and intelligent diagnosis module can diagnose and analyze the operation condition of the electric energy meter by comparing and analyzing the acquired data and the event and mining the data, so that the abnormal conditions such as the power quantity, the load and the like can be found in time, and when the on-site operation data of the electric energy meter is collected, only the related data acquired by the power consumption information acquisition system needs to be called;
B. classifying the data, and classifying the data into the following two categories: basic information data of the electric energy meter and monitoring data of the electric energy meter;
C. calculating the running condition value R of the electric energy meter according to the basic information data and the monitoring data of the electric energy meterM(ii) a And determining the actual operation state corresponding to the actual operation condition value of the electric energy meter according to the preset corresponding relation between the operation condition value and the operation state of the electric energy meter.
The corresponding relation between the operating condition value and the operating state of the electric energy meter is shown as the following table:
the method for testing the operation condition of the electric energy meter classifies the collected data and calculates the operation condition value R of the electric energy meter by collecting the basic information data and the field operation data of the electric energy meterMThe actual running state corresponding to the actual running condition value of the electric energy meter is determined according to the preset corresponding relation between the running condition value and the running state of the electric energy meter, the running state of the electric energy meter is obtained through data analysis, manual field inspection is not needed, and the efficiency is high; secondly, manual intervention is reduced, the failure of the original normally-operated equipment caused by human reasons can not occur, and the hidden danger of equipment failure is low; furthermore, the method considers the influence of primary current percentage, primary voltage percentage, primary load power factor, voltage waveform distortion rate, three-phase voltage unbalance, ambient temperature and ambient relative humidity on the electric energy meter, can realize the comprehensive inspection of the operation condition of the electric energy meter, ensures that the finally obtained operation condition inspection result is accurate, comprehensive and high in reliability, can accurately master the dynamic safety and stability of the operation condition of the electric energy meter, further ensures that each main electric energy meter can safely, stably and accurately operate, and can dynamically track and analyze accident handling information, thereby dynamically controlling serious faults.
The running condition value R of the electric energy meterMThe formula is as follows:
and omegaMI+ωMU+ωMcos+ωMTHDU+ωMdU+ωMT+ωMH＝1；
Wherein, IMIs the primary current percentage value of the electric energy meterThe primary current percentage value of the meter is the ratio of the primary current of the electric energy meter obtained by on-line monitoring to the rated current of the electric energy meter, IMmaxThe maximum value of the primary current percentage of the electric energy meter is 120 percent;
wherein Δ UMIs the voltage deviation percentage value, delta U, of the electric energy meterMlimThe voltage deviation limit value of the electric energy meter is +/-5%; delta UM＝UM-1，UMThe primary voltage percentage value of the electric energy meter is the ratio of the primary voltage of the electric energy meter obtained by on-line monitoring to the rated voltage of the electric energy meter;
wherein,is the primary load power factor of the electric energy meter,the lower limit value of the primary load power factor of the electric energy meter is 0.5;
wherein, THDUFor the rate of distortion of the voltage waveform, THD, of electric energy metersUlimThe upper limit value of the voltage waveform distortion rate of the electric energy meter is 5 percent;
wherein d isUIs the three-phase voltage unbalance of the electric energy meter, dUlimThe upper limit value of the electric energy meter is 4 percent;
wherein, TMIs the ambient temperature value, T, of the electric energy meterMnIs the rated ambient temperature value, C, of the electric energy meterTM1And CTM2Coefficient of rate of change for temperature induced degradation; according to the verification standard of the power transformer JJJG 1021-2007, the error change of the electric energy meter caused by the independent action of the environmental temperature does not exceed the basic error limit value 1/4, the temperature range in the verification condition is-25-55 ℃, and the temperature is at the rated temperature TMnThe lower variation is close to 0, and when the temperature is far beyond the upper limit and the lower limit, the variation is close to the basic error limit 1/4 and the rated environment temperature TMnAt 25 ℃ CTM1And CTM2For the coefficient of rate of change of temperature-induced degradation, C is takenTM1＝2、CTM2＝3；
Wherein HMIs the environmental humidity value H of the electric energy meterMnRated ambient humidity, C, required for electric energy metersHMIn order to change the change rate of the humidity-caused deterioration, according to the regulation that the environmental relative humidity is not more than 95% in the verification standard of the JJG1021-2007 power transformer, the error change of the electric energy meter caused by the independent action of the environmental humidity does not exceed the basic error limit value 1/8, and when the environmental humidity is less than the rated humidity HMnThe corresponding variation is close to 0 and the rated environment humidity HMn65% of the total amount of the components, and a change rate C of humidity-induced deteriorationHMThe content was 5%.
Electric energy meter operation condition value R calculated by using methodMThe method is accurate, comprehensive and high in reliability, can accurately master the dynamic safety stability of the operation condition of the electric energy meter, further ensures the safe, stable and accurate operation of the electric energy meter, and can dynamically track and analyze the accident handling information of the electric energy meter, thereby dynamically controlling the serious fault of the voltage transformer.
In the above embodiment, ω isMI、ωMU、ωMcos、ωMTHDU、ωMdU、ωMT、ωMHThe weight omega can be obtained by adopting a classical analytic hierarchy process, but the method is not easy to construct a discriminant array meeting the requirement of consistency, so that the invention provides a simple and effective method for determining the weight omegaMI、ωMU、ωMcos、ωMTHDU、ωMdU、ωMT、ωMHThe method comprises the following steps:
g1, determining order relation: in { EIM、EUM、ETHDU、EdU、ETM、EHMSelecting one type with the highest specific gravity as G1 *(ii) a Then selecting one type with the highest specific gravity from the remaining six types to be marked as G2 *(ii) a Selecting one type with the highest specific gravity from the rest five types as G3 *Selecting one type with the highest specific gravity from the rest four types as G4 *Selecting one type with the highest specific gravity from the rest three types as G5 *Selecting one type with the highest specific gravity from the rest two types as G6 *And the last remaining type is denoted as G7 *The order relationship is G1 *＞G2 *＞G3 *＞G4 *＞G5 *＞G6 *＞G7 *Wherein G is1 *＞G2 *Representation type G1 *Has a specific gravity of G or more2 *From this, E is determinedIM、EUM、ETHDU、EdU、ETM、EHMThe order relationship of;
judging the ratio of the specific gravity of the adjacent types: adjacent type Gk-1 *And Gk *The ratio G of the specific gravity to the specific gravityk-1 */Gk *＝ηkK is 7, 6, 5, 4, 3, 2, according to Gk-1 *And Gk *Specific gravity of ηkHas a value range of 1.0-1.8 and ηkThe judgment value rule is as follows:
g3, calculating a proportionality coefficient, namely obtaining η by the step g2kThe values are substituted into the following equation:
then G can be calculated1 *、G2 *、G3 *、G4 *、G5 *、G6 *、G7 *The weight vector ω ═ ω1,ω2,ω3,ω4,ω5,ω6,ω7]，ω1,ω2,ω3,ω4,ω5,ω6,ω7Corresponds to G1 *、G2 *、G3 *、G4 *、G5 *、G6 *、G7 *The weight of (a) can be obtained according to the determined order relationMI、ωMU、ωMcos、ωMTHDU、ωMdU、ωMT、ωMHThe value of (c).
The weight obtained by the method is more in line with the proportion of the primary current percentage, the primary voltage percentage, the primary load power factor, the voltage waveform distortion rate, the three-phase voltage unbalance degree, the environmental temperature and the environmental relative humidity of the electric energy meter in the actual situation, so that the finally obtained running working condition state value of the electric energy meter is more in line with the actual running working condition state, and the matching degree and the accuracy are higher.
Claims (2)
1. The method for checking the operation condition of the electric energy meter is characterized by comprising the following steps of:
A. collecting basic information data and field operation data of the electric energy meter;
B. classifying the data, and classifying the data into the following two categories: basic information data of the electric energy meter and monitoring data of the electric energy meter;
C. calculating the running condition value R of the electric energy meter according to the basic information data and the monitoring data of the electric energy meterMThe corresponding relation between the preset electric energy meter operation condition value and the operation state is used for determiningDetermining an actual operation state corresponding to an actual operation condition value of the electric energy meter;
the running condition value R of the electric energy meterMThe formula is as follows:
and omegaMI+ωMU+ωMcos+ωMTHDU+ωMdU+ωMT+ωMH＝1；
Wherein, IMThe primary current percentage value of the electric energy meter is the ratio of the primary current of the electric energy meter obtained by on-line monitoring to the rated current of the electric energy meter, IMmaxThe maximum value of the primary current percentage of the electric energy meter is obtained;
wherein Δ UMIs the voltage deviation percentage value, delta U, of the electric energy meterMlimThe voltage deviation limit value of the electric energy meter; delta UM＝UM-1，UMThe primary voltage percentage value of the electric energy meter is the ratio of the primary voltage of the electric energy meter obtained by on-line monitoring to the rated voltage of the electric energy meter;
wherein,is the primary load power factor of the electric energy meter,the lower limit value of the primary load power factor of the electric energy meter is obtained;
wherein, THDUFor the rate of distortion of the voltage waveform, THD, of electric energy metersUlimThe upper limit value of the distortion rate of the voltage waveform of the electric energy meter;
wherein d isUIs the three-phase voltage unbalance of the electric energy meter, dUlimThe upper limit value of the electric energy meter;
wherein, TMIs the ambient temperature value, T, of the electric energy meterMnIs the rated ambient temperature value, C, of the electric energy meterTM1And CTM2Coefficient of rate of change for temperature induced degradation;
wherein HMIs the environmental humidity value H of the electric energy meterMnRated ambient humidity, C, required for electric energy metersHMThe rate of change causing the deterioration for humidity.
2. The method for checking the operating condition of the electric energy meter according to claim 1, characterized in that: the omegaMI、ωMU、ωMcos、ωMTHDU、ωMdU、ωMT、ωMHThe method is determined by adopting the following steps:
g1, determining order relation: in thatOne type with the largest specific gravity is selected and recorded as G1 *(ii) a Then selecting one type with the highest specific gravity from the remaining six types to be marked as G2 *(ii) a Selecting the five remaining types with the highest specific gravityIs denoted as G3 *Selecting one type with the highest specific gravity from the rest four types as G4 *Selecting one type with the highest specific gravity from the rest three types as G5 *Selecting one type with the highest specific gravity from the rest two types as G6 *And the last remaining type is denoted as G7 *The order relationship isWhereinRepresentation type G1 *Has a specific gravity of G or more2 *From this, E is determinedIM、EUM、ETHDU、EdU、ETM、EHMThe order relationship of;
g2, judging the ratio of the specific gravity of the adjacent types: adjacent type Gk-1 *And Gk *The ratio G of the specific gravity to the specific gravityk-1 */Gk *＝ηkK is 7, 6, 5, 4, 3, 2, according to Gk-1 *And Gk *Specific gravity of ηkHas a value range of 1.0-1.8 and ηkThe judgment value rule is as follows: when type Gk-1 *And type Gk *η when they have the same specific gravitykWhen the type G is in the range of 1.0k-1 *Is slightly higher than that of type Gk *η at a specific gravity ofkHas a value range of 1.2 when the type G isk-1 *Is significantly higher than type Gk *η at a specific gravity ofkHas a value range of 1.4 when the type G isk-1 *Has a specific gravity strongly higher than that of type Gk *η at a specific gravity ofkIs gotThe value range is 1.6 when type Gk-1 *Is extremely higher than type Gk *η at a specific gravity ofkHas a value in the range of 1.8, ηkThe median value of two adjacent judgments of (1.1), (1.3), (1.5), (1.7);
g3, calculating a proportionality coefficient, namely obtaining η by the step g2kThe values are substituted into the following equation:
wherein m is 7
Then G can be calculated1 *、G2 *、G3 *、G4 *、G5 *、G6 *、G7 *The weight vector ω ═ ω1,ω2,ω3,ω4,ω5,ω6,ω7]，ω1,ω2,ω3,ω4,ω5,ω6,ω7Corresponds to G1 *、G2 *、G3 *、G4 *、G5 *、G6 *、G7 *The weight of (a) can be obtained according to the determined order relationMI、ωMU、ωMcos、ωMTHDU、ωMdU、ωMT、ωMHThe value of (c).
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| CN106646321B (en) * | 2016-11-18 | 2023-10-27 | 云南电网有限责任公司电力科学研究院 | Synchronous calibration method and system for direct current transformer |
| CN106680759A (en) * | 2017-01-05 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Operational monitoring estimation method and apparatus for gateway metering equipment |
| CN109597015A (en) * | 2018-12-21 | 2019-04-09 | 国网山西省电力公司长治供电公司 | A kind of electric energy meter method for detecting operation state |
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