CN111812578A - Gateway meter electric energy monitoring method - Google Patents
Gateway meter electric energy monitoring method Download PDFInfo
- Publication number
- CN111812578A CN111812578A CN202010600096.0A CN202010600096A CN111812578A CN 111812578 A CN111812578 A CN 111812578A CN 202010600096 A CN202010600096 A CN 202010600096A CN 111812578 A CN111812578 A CN 111812578A
- Authority
- CN
- China
- Prior art keywords
- gateway
- voltage
- current
- error
- electric energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 43
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention belongs to a monitoring method, and particularly relates to a gateway meter electric energy monitoring method. It includes: step 1: establishing a test object; taking two gateway tables with the same model, wherein one gateway table is kept in a constant temperature environment at 23 ℃, the other gateway table is placed in a variable temperature environment, the variable temperature environment refers to that the environment temperature is adjusted according to different temperatures to be tested, and the step 2: inputting and recording output; the test comprises voltage and current test; and step 3: calculating an error curve; respectively carrying out curve fitting on errors obtained by voltage and current tests; and 4, step 4: circulating; circularly executing the step 2 and the step 3 until all the temperatures to be tested are tested; and 5: correcting errors; and correcting the result of the actual gateway table by using the obtained voltage error curve and current error curve. The invention has the following remarkable effects: the monitoring result is accurate, and the cost is low.
Description
Technical Field
The invention belongs to a monitoring method, and particularly relates to a gateway meter electric energy monitoring method.
Background
The gateway meter is an electric energy meter applied to gateway electric energy metering devices of power generation enterprises for surfing the internet, cross-regional connecting lines, provincial connecting lines, intra-provincial networks and the like. Because the electric quantity value recorded by the gateway table is quite large, even if a short-time fault occurs, the gateway table causes great economic loss.
Through a series of previous researches, the temperature has a great influence on the measurement of the electric energy of the gateway meter, and in the most serious case, the measured quantity of the electric energy reaches 20 percent. Because the influence of the temperature on the electric energy measurement of the gateway meter does not change linearly with the temperature, no systematic research is carried out on how to monitor the electric energy of the gateway meter in the prior art, and no effective solution is provided.
In the prior art, replacement methods such as replacing a high-precision gate table are more suggested. However, the number of the present gateway meters used in the power grid is large, the cost of replacing the gateway meters with high-precision meters is very high, and the high-precision gateway meters cannot be guaranteed not to be influenced by the temperature. Therefore, a simple and easy method for monitoring the electric energy of the meter with low cost is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a gateway meter electric energy monitoring method.
The invention is realized by the following steps: a gateway meter electric energy monitoring method comprises the following steps:
step 1: building test objects
Taking two gateway meters with the same model, wherein one gateway meter is kept in a constant temperature environment at 23 ℃, the other gateway meter is placed in a variable temperature environment,
the variable temperature environment refers to that the environmental temperature is adjusted according to different temperatures to be tested,
step 2: inputting and recording output
The test comprises voltage and current test;
and step 3: calculating an error curve
Respectively carrying out curve fitting on errors obtained by voltage and current tests;
and 4, step 4: circulation of
Circularly executing the step 2 and the step 3 until all the temperatures to be tested are tested;
and 5: error correction
And correcting the result of the actual gateway table by using the obtained voltage error curve and current error curve.
In the method for monitoring the electric energy of the gateway meter, in step 1, the two gateway meters with the same model should be the same as the model of the actually used gateway meter to be monitored.
In the method for monitoring the electric energy of the gateway meter, in step 1, the gateway meter is required to keep the temperature at the newly set temperature for more than 4 hours each time the ambient temperature is changed.
The gateway meter electric energy monitoring method is characterized in that the range of the ambient temperature is-30-50 ℃; the change in ambient temperature was 1 ℃ as the minimum temperature change amplitude.
The method for monitoring the electric energy of the gateway meter comprises the following steps of (1) testing the gateway meter in the temperature-variable environment according to the following procedures after the heat preservation time of the gateway meter meets the requirement,
step 2.1: voltage testing
Firstly, the input current of the gate table is set as the median of the rated current, and then the input voltage of the gate table is set as the lower limit of the rated voltage, and the voltage is set as VminThen add a small voltage magnitude (V) without secondary testingmax-Vmin) K, wherein VmaxIs the upper limit of rated voltage, k is the data inputted from outside, until the endThe input voltage is the upper limit V of rated voltagemaxThe k is in the range of 50-10000, preferably 100,
through the test, k +1 test data are obtained in all in each gateway table,
step 2.2: current testing
Firstly, setting the input voltage of the gate table as the median of the rated current, and then setting the input current of the gate table as the lower limit of the rated voltage, wherein the current is IminThen, a slight current amplitude (I) is added in the next testmax-Imin) P of which ImaxIs the upper limit of rated current, p is the data input from outside, and the voltage input to the end is the upper limit of rated voltagemax，
The range of p is 50-10000, preferably 100, the values of the value p and the value k can be the same or different,
with the above test, p +1 test data are obtained in total per gateway table.
The gateway meter electric energy monitoring method is characterized in that the following calculation is carried out on the two groups of k +1 numerical values obtained in the step 2.1,
subtracting the data corresponding to the two gate tables to obtain k +1 voltage error data, performing curve fitting based on the k +1 voltage error data,
the curve fitting can be performed using any existing fitting method, such as least squares,
the following calculations were performed on the two sets of p +1 values obtained in step 2.2,
and subtracting the data corresponding to the two gateway tables to obtain p +1 current error data, and performing curve fitting on the basis of the p +1 current error data.
The method for monitoring the electric energy of the gateway meter comprises the steps of firstly inquiring the temperature of the place where the gateway meter is actually used, determining a voltage error curve and a current error curve at the temperature, then inquiring the voltage and current values output by the gateway meter, respectively obtaining the voltage error and the current error through the voltage error curve and the current error curve, and finally subtracting the corresponding errors from the voltage and current values output by the gateway meter to obtain the monitored voltage value of the gateway meter and the monitored current value of the gateway meter.
The invention has the following remarkable effects: the invention obtains more accurate error value by using the gateway table with the same number as the actual gateway table, and the method uses the output value of the gateway table at 23 ℃ as the standard value, thereby reducing the influence of the error of the gateway table on the subsequent monitoring caused by the temperature to the maximum extent, correcting the actual measurement value by using the result of independent test, ensuring accurate result and low cost.
Detailed Description
A gateway meter electric energy monitoring method comprises the following steps:
step 1: building test objects
Two gateway meters with the same model are taken, wherein one gateway meter is kept in a constant temperature environment at 23 ℃, and the other gateway meter is placed in a variable temperature environment.
The two same type of gateway tables should be the same type as the actual gateway table to be monitored.
The variable temperature environment refers to that the environmental temperature is adjusted according to different temperatures to be tested.
Every time the ambient temperature is changed, the heat of the closing table is preserved for more than 4 hours in the newly set temperature. While a longer soak time may ensure that the tariff is highly consistent with ambient temperature, 4 hours is the minimum temperature duration for the soak in view of the cost of test time.
The range of the ambient temperature is-30 ℃ to 50 ℃.
The change in ambient temperature was 1 ℃ as the minimum temperature change amplitude.
Step 2: inputting and recording output
And when the heat preservation time of the gateway table in the temperature changing environment meets the requirement, testing according to the following processes respectively.
Step 2.1: voltage testing
Firstly, the input current of the gate table is set as the median of the rated current, and then the input voltage of the gate table is set as the lower limit of the rated voltage, and the voltage is set as VminThen add a small voltage magnitude (V) without secondary testingmax-Vmin) K, wherein VmaxIs the upper limit of the rated voltage, k is the data inputted from outside, until the voltage inputted finally is the upper limit V of the rated voltagemax。
The k ranges from 50 to 10000, and is preferably 100.
Through the above test, a total of k +1 test data are obtained for each gateway table.
Step 2.2: current testing
Firstly, setting the input voltage of the gate table as the median of the rated current, and then setting the input current of the gate table as the lower limit of the rated voltage, wherein the current is IminThen, a slight current amplitude (I) is added in the next testmax-Imin) P of which ImaxIs the upper limit of rated current, p is the data input from outside, and the voltage input to the end is the upper limit of rated voltagemax。
The range of p is 50-10000, preferably 100. The values of the value p and the value k may be the same or different.
With the above test, p +1 test data are obtained in total per gateway table.
And step 3: calculating an error curve
The following calculations were performed on the two sets of k +1 values obtained in step 2.1.
And subtracting the data corresponding to the two gateway tables to obtain k +1 voltage error data, and performing curve fitting on the basis of the k +1 voltage error data.
The curve fitting may be by any existing fitting method, such as least squares.
The following calculations were performed on the two sets of p +1 values obtained in step 2.2.
And subtracting the data corresponding to the two gateway tables to obtain p +1 current error data, and performing curve fitting on the basis of the p +1 current error data.
The curve fitting may be by any existing fitting method, such as least squares.
And 4, step 4: circulation of
Since the voltage error curve and the current error curve at a specific temperature can be obtained in step 2 and step 3, in order to obtain the voltage error curve and the current error curve at all temperatures, step 2 and step 3 need to be executed in a loop until all temperatures needing to be tested are tested. The temperature range to be tested is-30 ℃ to 50 ℃. Each change has 1 ℃ as the minimum temperature change amplitude.
And 5: error correction
Because the type of the selected gateway table for testing is the same as that of the actually used gateway table in the step 1, when the actually used gateway table is monitored, the temperature of the place where the gateway table is located is firstly inquired, a voltage error curve and a current error curve under the temperature are determined, then the voltage and current numerical values output by the gateway table are inquired, the voltage error and the current error are obtained through the voltage error curve and the current error curve respectively, and finally the corresponding errors are subtracted by the voltage and current numerical values output by the gateway table, so that the monitored voltage value and the monitored current value of the gateway table are obtained. The gate table monitoring voltage value and the gate table monitoring current value are used in the calculation of other parameters.
Claims (7)
1. A gateway meter electric energy monitoring method is characterized by comprising the following steps:
step 1: building test objects
Taking two gateway meters with the same model, wherein one gateway meter is kept in a constant temperature environment at 23 ℃, the other gateway meter is placed in a variable temperature environment,
the variable temperature environment refers to that the environmental temperature is adjusted according to different temperatures to be tested,
step 2: inputting and recording output
The test comprises voltage and current test;
and step 3: calculating an error curve
Respectively carrying out curve fitting on errors obtained by voltage and current tests;
and 4, step 4: circulation of
Circularly executing the step 2 and the step 3 until all the temperatures to be tested are tested;
and 5: error correction
And correcting the result of the actual gateway table by using the obtained voltage error curve and current error curve.
2. The gateway meter electric energy monitoring method of claim 1, characterized in that: in step 1, the two gateway tables with the same model should be the same as the model of the actually used gateway table to be monitored.
3. The gateway meter electric energy monitoring method of claim 2, characterized in that: in step 1, the heat of the closing table is required to be preserved for more than 4 hours in the newly set temperature every time the environmental temperature is changed.
4. A gateway meter power monitoring method according to claim 3, characterized in that: the range of the ambient temperature is-30 ℃ to 50 ℃; the change in ambient temperature was 1 ℃ as the minimum temperature change amplitude.
5. The gateway meter electric energy monitoring method of claim 4, characterized in that: the step 2 comprises testing the gateway according to the following procedures respectively after the heat preservation time of the gateway in the temperature-changing environment meets the requirements,
step 2.1: voltage testing
Firstly, the input current of the gate table is set as the median of the rated current, and then the input voltage of the gate table is set as the lower limit of the rated voltage, and the voltage is set as VminThen add a small voltage magnitude (V) without secondary testingmax-Vmin) K, wherein VmaxIs the upper limit of the rated voltage, k is the data inputted from outside, until the voltage inputted finally is the upper limit V of the rated voltagemax，
The k is in the range of 50-10000, preferably 100,
through the test, k +1 test data are obtained in all in each gateway table,
step 2.2: current testing
Firstly, setting the input voltage of the gate table as the median of the rated current, and then setting the input current of the gate table as the lower limit of the rated voltage, wherein the current is IminThen, a slight current amplitude (I) is added in the next testmax-Imin) P of which ImaxIs the upper limit of rated current, p is the data input from outside, and the voltage input to the end is the upper limit of rated voltagemax，
The range of p is 50-10000, preferably 100, the values of the value p and the value k can be the same or different,
with the above test, p +1 test data are obtained in total per gateway table.
6. The gateway meter electric energy monitoring method of claim 5, characterized in that: the following calculations were performed on the two sets of k +1 values obtained in step 2.1,
subtracting the data corresponding to the two gate tables to obtain k +1 voltage error data, performing curve fitting based on the k +1 voltage error data,
the curve fitting can be performed using any existing fitting method, such as least squares,
the following calculations were performed on the two sets of p +1 values obtained in step 2.2,
and subtracting the data corresponding to the two gateway tables to obtain p +1 current error data, and performing curve fitting on the basis of the p +1 current error data.
7. The gateway meter electric energy monitoring method of claim 6, characterized in that: firstly, the temperature of the place where the gateway table is actually used is inquired, a voltage error curve and a current error curve under the temperature are determined, then the voltage and current numerical values output by the gateway table are inquired, the voltage error and the current error are obtained through the voltage error curve and the current error curve respectively, and finally the corresponding errors are subtracted from the voltage and current numerical values output by the gateway table, so that the monitoring voltage value and the monitoring current value of the gateway table are obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010600096.0A CN111812578A (en) | 2020-06-28 | 2020-06-28 | Gateway meter electric energy monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010600096.0A CN111812578A (en) | 2020-06-28 | 2020-06-28 | Gateway meter electric energy monitoring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111812578A true CN111812578A (en) | 2020-10-23 |
Family
ID=72855108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010600096.0A Pending CN111812578A (en) | 2020-06-28 | 2020-06-28 | Gateway meter electric energy monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111812578A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858980A (en) * | 2021-01-13 | 2021-05-28 | 国家电网有限公司华东分部 | Gateway metering abnormity diagnosis method combining sampling and big data |
| CN113138362A (en) * | 2021-05-11 | 2021-07-20 | 深圳市先行电气技术有限公司 | Calibration method for automatically compensating electric energy metering error of electric energy meter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590782A (en) * | 2012-03-05 | 2012-07-18 | 钜泉光电科技(上海)股份有限公司 | Method and device for automatically correcting voltage influence quantity of electric energy measurement chip |
| CN103439367A (en) * | 2013-09-04 | 2013-12-11 | 国家电网公司 | Composite insulator string live detection equipment |
| CN103454611A (en) * | 2013-08-29 | 2013-12-18 | 深圳市卓联电子有限公司 | Electric energy metering device remote calibration detection system and secondary voltage drop detection method |
| CN104808168A (en) * | 2015-03-25 | 2015-07-29 | 广州市格宁电气有限公司 | Rapid electric energy meter verification method based on segmented current technology |
| CN107741577A (en) * | 2017-08-04 | 2018-02-27 | 国网辽宁省电力有限公司电力科学研究院 | A method and system for on-line monitoring and analysis of gateway meter accuracy |
| CN110031792A (en) * | 2019-05-17 | 2019-07-19 | 贵州电网有限责任公司 | Consider the Basic Error of Energy Meter test device and method of temperature and curent change |
| CN110308415A (en) * | 2019-07-05 | 2019-10-08 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | The error compensating method and device of electric energy metered system |
-
2020
- 2020-06-28 CN CN202010600096.0A patent/CN111812578A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590782A (en) * | 2012-03-05 | 2012-07-18 | 钜泉光电科技(上海)股份有限公司 | Method and device for automatically correcting voltage influence quantity of electric energy measurement chip |
| CN103454611A (en) * | 2013-08-29 | 2013-12-18 | 深圳市卓联电子有限公司 | Electric energy metering device remote calibration detection system and secondary voltage drop detection method |
| CN103439367A (en) * | 2013-09-04 | 2013-12-11 | 国家电网公司 | Composite insulator string live detection equipment |
| CN104808168A (en) * | 2015-03-25 | 2015-07-29 | 广州市格宁电气有限公司 | Rapid electric energy meter verification method based on segmented current technology |
| CN107741577A (en) * | 2017-08-04 | 2018-02-27 | 国网辽宁省电力有限公司电力科学研究院 | A method and system for on-line monitoring and analysis of gateway meter accuracy |
| CN110031792A (en) * | 2019-05-17 | 2019-07-19 | 贵州电网有限责任公司 | Consider the Basic Error of Energy Meter test device and method of temperature and curent change |
| CN110308415A (en) * | 2019-07-05 | 2019-10-08 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | The error compensating method and device of electric energy metered system |
Non-Patent Citations (2)
| Title |
|---|
| 吴涛等: "关口电度表误差现场监测分析系统", 《电测与仪表》 * |
| 肖勇等: "关口表计量影响量分析", 《电测与仪表》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858980A (en) * | 2021-01-13 | 2021-05-28 | 国家电网有限公司华东分部 | Gateway metering abnormity diagnosis method combining sampling and big data |
| CN113138362A (en) * | 2021-05-11 | 2021-07-20 | 深圳市先行电气技术有限公司 | Calibration method for automatically compensating electric energy metering error of electric energy meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zaker et al. | Simultaneous parameter identification of synchronous generator and excitation system using online measurements | |
| Martínez‐Moreno et al. | On the testing of large PV arrays | |
| CN111812578A (en) | Gateway meter electric energy monitoring method | |
| Zhou et al. | Data requisites for transformer statistical lifetime modelling—Part II: Combination of random and aging-related failures | |
| Zhao et al. | On-line PMU-based transmission line parameter identification | |
| Kenny et al. | Energy rating of PV modules: comparison of methods and approach | |
| Delle Femine et al. | Advanced instrument for field calibration of electrical energy meters | |
| Srinivasan et al. | Effects of environmental factors in transformer’s insulation life | |
| CN109581271B (en) | A fast simulation method of electricity consumption data in a typical low-voltage station area | |
| Della Torre et al. | Instrument transformers: A different approach to their modeling | |
| CN108896852B (en) | Online measurement method and system for short circuit capacity of public access point | |
| Fei et al. | Research on the responsibility partition of harmonic pollution and harmonic impedance based on the total least-squares regression method | |
| CN104345225B (en) | SVG apparatus detection system based on RTDS | |
| CN104237583A (en) | Relay mal-operation preventing method based on influence of voltage fluctuation on relay and circuit | |
| Nofuentes et al. | A reference‐module‐based procedure for outdoor estimation of crystalline silicon PV module peak power | |
| CN112731248B (en) | Electronic power distribution automation feeder terminal test conversion device | |
| Shu et al. | A Multiharmonic Sources Localization Algorithm Based on ICA and Posterior Harmonic Admittance | |
| Groß et al. | Evaluation of a three-phase distribution system state estimation for operational use in a real medium voltage grid | |
| Vazquez et al. | Background harmonic distortion measurement at power networks with wind farms | |
| CN206960641U (en) | Intelligent electric energy meter Performance Evaluation experimental rig | |
| Li et al. | Distribution network state estimation based on node voltage of variable weights | |
| Ghazali et al. | TNB experience in the use of smart meter for real time monitoring on the thermal performance of in-service distribution transformer | |
| CN105305441B (en) | A kind of state and parametric joint method for tracing | |
| Lipsky et al. | Some problems of smart meter algorithms for electric power quality measurements | |
| Singh et al. | Modified STC correction procedure for assessing PV module degradation in field surveys |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201023 |
|
| RJ01 | Rejection of invention patent application after publication |