CN107843870B - Method and system for detecting correctness of metering load curve of electric meter - Google Patents
Method and system for detecting correctness of metering load curve of electric meter Download PDFInfo
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Abstract
The invention discloses a method for detecting the correctness of a metering load curve of an electric meter, which comprises the following steps: configuring test parameters and test conditions of the ammeter; starting load recording, circulating for N times, and storing the data of the test parameters; reading the load curve stored each time, comparing the load curve with preset conditions, if the load curve meets the preset conditions, sequentially reading back 288 times of data in the data storing the test parameters by the system, judging whether the data of the test parameters are qualified, if so, circulating the system for M times again, reading 99 load record data, and judging whether the load record data are consistent with the data calculated by the ammeter; if the data are consistent, the measured category data are output to meet the requirements. A system for detecting the correctness of a metering load curve of an ammeter comprises an initial setting module, a data testing module and a data judging module, so that the work of testing personnel is reduced, and the labor cost of an enterprise is saved; meanwhile, the product quality is improved through omnibearing functional test; the method is widely applied to the field of electric energy meter metering.
Description
Technical Field
The invention relates to the field of electric energy meter measurement, in particular to a method and a system for detecting the correctness of a measurement load curve of an electric meter.
Background
Load curve: curves of various power loads in the power system along with time variation; which is the basis for scheduling power and planning power systems. The load of the power system relates to various users in a wide area, the power utilization condition of each user is different, and the time, the place and the type of load added cannot be known in advance, so the load change of the power system has randomness. The change of the load with time is described by using the load curve, and the regularity of the change of the load is researched according to the change of the load curve.
As is known, the construction of the power supply has a certain periodicity, which cannot significantly improve the supply capacity of the supply side in a short time; the method improves the tension of power supply in China by improving the management level of the demand side, improves the economic benefit of power supply enterprises, and has very important significance for improving the utilization efficiency of energy in China, reducing environmental pollution and even the healthy development of the whole national economy. Meanwhile, the requirement of the power supply department on the electricity larceny prevention technology of the user side is more and more urgent. The improvement of the traditional settlement means brought by the method has stronger and stronger demand on monitoring the electricity utilization condition of large and medium-sized industrial users and distribution transformer metering monitoring points. The load curve is recorded through the electric energy meter, customer management work is well done, customer electricity load characteristics are known, load change trends are known in time, and prediction work of a dispatching department is facilitated.
The load curve records the data of the items classified into six categories (voltage/current/frequency, active power, power factor, total electric quantity, four-quadrant reactive power and current demand). Each record of the standard requirement ammeter is used for storing all six types of data; the time for storing the load curve is synchronous with the clock of the electric meter, the time for storing the data is determined according to the set clock relationship between the six types of data recording intervals and the electric meter, and the interval time of the storage time is minimum 1 minute.
In the existing test mode, the parameters of the electric meter are set and the characters are printed under specific voltage and current according to national standard and the adjustment of six types of data at time intervals, then the data stored in the electric meter is read out through a test tool, and whether the software and hardware functions of the tested electric meter are normal or not is judged according to the result of manual judgment.
The current test mode of the electric energy load curve of an electric meter manufacturer comprises the following steps:
the tester sets interval time and mode characters of a load curve for the electric meter, then starts the electric meter to enable the electric meter to record data by itself, then closes the electric meter at set time, reads all data through software, performs manual sampling, and compares the data with expected data.
Because the measurement and test data of the load curve are huge, even the simple test usually takes a plurality of days for professionals, and the method cannot achieve comprehensive test as much as possible, and is only a sampling method, which also obtains a conclusion in the later comparison through manual observation and calculation comparison, thereby being time-consuming, labor-consuming and low in quality.
In summary, there is a need for improvement in this technology.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a method and a system for detecting a correct and incorrect measurement load curve of an electricity meter.
The technical scheme adopted by the invention is as follows:
the invention provides a method for detecting the correctness of a metering load curve of an ammeter, which comprises the following steps:
the system receives an instruction input by a user, and configures test parameters and test conditions of the ammeter;
respectively setting freezing frequencies of various test parameters;
the system starts load recording, and circulates for N times, wherein N is more than 288, and the data of the test parameters are stored;
respectively reading the load curve stored each time by the system, comparing the load curve with a preset condition, and if the load curve does not meet the preset condition, outputting an error prompt of the load curve by the system;
if the load curve meets the preset condition, the system sequentially reads back the last 288 times of data in the stored data of the test parameters and judges whether the data are qualified, and if the data are not qualified, the system outputs the error prompt of the load curve;
if the test parameters are qualified, the system circulates for M times again, 99 load record data are read, and whether the data of the test parameters are consistent with the data calculated by the ammeter or not is judged, wherein M is more than 99;
if the test parameters are consistent, outputting the data of the test parameters to meet the requirements;
and repeating the steps in sequence until the data of the various test parameters of the ammeter are tested.
As an improvement of the technical scheme, the test parameters comprise voltage/current/frequency, active power, power factor and total electric quantity.
As an improvement of the technical scheme, the test parameters also comprise four-quadrant reactive power and current demand.
As an improvement of this solution, the test parameters further include a recording time of the load curve.
As an improvement of the technical scheme, the test conditions comprise test voltage, current and phase angle.
Further, the test voltage comprises a normal voltage and/or a critical voltage loss and/or an overvoltage.
Further, the preset conditions include a preset voltage vector, a preset current vector and a power factor.
In another aspect, the present invention further provides a system for detecting a correctness of a metering load curve of an electricity meter, including:
the system comprises an initial setting module, a power supply module and a power supply module, wherein the initial setting module is used for executing the steps that the system receives an instruction input by a user and configuring test parameters and test conditions of an ammeter; respectively setting freezing frequencies of various test parameters;
the data testing module is used for executing the step that the system starts load recording, circulating for N times, wherein N is larger than 288, and storing the data of the testing parameters; the system respectively reads the load curve stored each time and compares the load curve with preset conditions,
the data judgment module is used for executing the step, if the load curve does not meet the preset condition, the system outputs the load curve error prompt; if the load curve meets the preset condition, the system sequentially reads back the last 288 times of data in the stored data of the test parameters and judges whether the data of the test parameters are qualified, and if not, the system outputs an error prompt of the load curve;
if the test parameters are qualified, the system circulates for M times again, 99 load record data are read, and whether the data of the test parameters are consistent with the data calculated by the ammeter or not is judged, wherein M is more than 99;
if the test parameters are consistent, outputting the data of the test parameters to meet the requirements; and repeating the steps in sequence until the data of various test parameters of the ammeter are tested.
The invention has the beneficial effects that: according to the method and the system for detecting the correctness of the metering load curve of the electric meter, provided by the invention, the load curve is collected in a circulating manner by setting a test environment, meanwhile, whether a preset condition is met or not is detected by covering a part of stored data, whether the obtained data is consistent with the data obtained by the electric meter or not is judged by reading back the stored data, and the correctness of the load curve is further judged; by the method for testing the load curve of the electric meter, the data type of the load curve of the electric meter is fully covered by national standards, and the data is stored and recorded completely; meanwhile, the adjustment of testing tools and testing environments by testing personnel is reduced, the method is realized through software control, the method is simple, reasonable in structure and ingenious in concept, the concept of intelligent testing is introduced, a method designed in advance is adopted, and a user participates in software configuration through mode switching to complete the required functions. The labor cost of an enterprise is saved as the work of a tester is reduced; meanwhile, the product quality is improved by omnibearing functional test instead of sampling test; the problem is analyzed by combining a computer, so that the data of the test parameters are more accurate and real without visual observation and manual calculation.
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The following further describes embodiments of the present invention with reference to the accompanying drawings:
FIG. 1 is a schematic flow chart of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a control module according to a second embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The invention provides a method for detecting the correctness of a metering load curve of an ammeter, which comprises the following steps:
the system receives an instruction input by a user, and configures test parameters and test conditions of the ammeter;
respectively setting freezing frequencies of various test parameters;
the system starts load recording, and circulates for N times, wherein N is more than 288, and the data of the electric meter test parameters are stored;
respectively reading the load curve stored each time by the system, comparing the load curve with a preset condition, and if the load curve does not meet the preset condition, outputting an error prompt of the load curve by the system;
if the load curve meets the preset condition, the system sequentially reads back the last 288 times of data in the stored data of the test parameters and judges whether the data are qualified, and if the data are not qualified, the system outputs the error prompt of the load curve;
if the test parameters are qualified, the system circulates for M times again, 99 load record data are read, and whether the data of the test parameters are consistent with the data calculated by the ammeter or not is judged, wherein M is more than 99;
if the test parameters are consistent, outputting the data of the test parameters to meet the requirements; meanwhile, the curved surface obtained by the data of the test parameters is correct;
and repeating the steps in sequence until the data of various test parameters of the ammeter are tested. If the measured various data meet the requirements, outputting the load curve to be correct, otherwise, outputting the load curve to be incorrect.
As an improvement of the technical scheme, the test parameters comprise voltage/current/frequency, active power, power factor and total electric quantity.
As an improvement of the technical scheme, the test parameters also comprise four-quadrant reactive power and current demand.
As an improvement of this solution, the test parameters further include a recording time of the load curve.
As an improvement of the technical scheme, the test conditions comprise test voltage, current and phase angle.
Further, the test voltage comprises a normal voltage and/or a critical voltage loss and/or an overvoltage.
Further, the preset conditions include a preset voltage vector, a preset current vector and a power factor.
As a specific embodiment of the scheme, before testing the electric meter, a tester configures test parameters, for example, six types of parameters are recorded for a three-phase meter, and the six types of parameters include voltage/current/frequency; active power; a power factor; the total electric quantity; four-quadrant reactive power; the current demand; and the single-phase table standard only needs to record the first four types of data. If the tested meter is a single-phase meter, only four types of data to be tested are configured, and the voltage (or normal voltage, or critical voltage loss, or overvoltage state) of each round of test, parameters of the current environment and the like are configured. When the test conditions are completely configured, a tester starts the software to test, the tester does not need to watch the software, the software can automatically complete all test flows, and in the process, the software automatically records and compares the test flows to obtain an analysis result, so that the tester can conveniently read the analysis result.
The invention adopts all combination conditions according to the national standard of the ammeter industry, and adopts software to automatically finish the check of whether the ammeter correctly and completely records the load curve.
The scheme configuration process comprises the following steps:
1. the recording times (which can be set arbitrarily, such as 1 minute, 2 minutes, 5 minutes, 15 minutes) for configuring the six types of the conformity curves were adjusted in combination according to the course of each test.
2. And configuring the voltage, current and phase angle of the power supply of the electric meter. The specific configuration can be adjusted in combination according to the process of each test.
The configuration can be configured before the test total starting process, and each test of the software sets the electric meter according to the test parameters. Whether the load curve can be correctly recorded in the normal environment and the abnormal environment of the electric meter can be tested through setting, so that whether an embedded software program and hardware in the electric meter are reasonable and correct can be reflected.
Referring to fig. 1, a method for detecting the correctness of a metering load curve of an electric meter comprises the following steps:
the software program firstly supplies energy to the electric meter to be tested by reading the configuration, and then transmits data to the electric meter through communication;
performing freezing frequency setting: if the first type of data, the voltage, the current and the frequency are set to be frozen once in two minutes, the second type of data, the active power is set to be frozen once in thirty minutes, and the like;
carrying out load curve data zero clearing on the electric meter;
setting the meter time, such as 2017/1/100: 59: 57 seconds, wherein the purpose is to enable the zero crossing point of the ammeter to start to freeze the load curve data;
the cycle is 290 times, the electric meter is adjusted to the preset time, such as 1 hour, each time, the purpose of doing so is to enable the electric meter to automatically freeze each type of load curve data, for example, the first type of data should be frozen 30 times, but actually frozen once, and other data areas should be supplemented with FF data according to the standard requirement; the purpose of the 290 cycles is that the standard specifies that the maximum frozen data is 288, and later frozen data will replace the previous data in turn, wherein 290 is not limited herein as long as it is greater than 288.
In the 290 cycles, each program reads the frozen load curve of the electric meter, and compares the frozen load curve with a pre-learned algorithm, such as whether the read values and the actual values of the voltage and the current are in a reasonable fluctuation range, whether the electric quantity value is correct, whether abnormal sudden change exists or not, and the like.
After the 290 determinations, the program reads back 288 additional times, wherein the time is no longer set, and the meter data is read out and compared with the last 288 of the 290 determinations. The purpose is to verify that the meter has correctly stored each load curve record and to determine the overlay storage.
After all the data are judged to be correct, the program is recycled for 100 times, 99 blocks of load record data are read, each piece of record data is stored, and the data validity (whether to fill a bit FF) is judged; the number of cycles 100 is also not limited as long as it is greater than 99.
After the above process is completed, the program will perform the second round of processing, analysis and comparison according to the power supply parameters of the exterior until the test of various data is completed.
Referring to fig. 2, the present invention further provides a system for detecting the correctness of the metering load curve of the electric meter, including:
the system comprises an initial setting module, a power supply module and a power supply module, wherein the initial setting module is used for executing the steps that the system receives an instruction input by a user and configuring test parameters and test conditions of an ammeter; respectively setting freezing frequencies of various test parameters;
the data testing module is used for executing the step that the system starts load recording, circulating for N times, wherein N is larger than 288, and storing the data of the testing parameters; the system respectively reads the load curve stored each time and compares the load curve with preset conditions,
the data judgment module is used for executing the step, if the load curve does not meet the preset condition, the system outputs the load curve error prompt; if the load curve meets the preset condition, the system sequentially reads back the last 288 times of data in the stored data of the test parameters and judges whether the data of the test parameters are qualified, and if not, the system outputs an error prompt of the load curve;
if the test parameters are qualified, the system circulates for M times again, 99 load record data are read, and whether the data of the test parameters are consistent with the data calculated by the ammeter or not is judged, wherein M is more than 99;
if the test parameters are consistent, outputting the data of the test parameters to meet the requirements; and repeating the steps in sequence until the data of various test parameters of the ammeter are tested.
According to the method and the system for detecting the correctness of the metering load curve of the electric meter, provided by the invention, the load curve is collected in a circulating manner by setting a test environment, meanwhile, whether a preset condition is met or not is detected by covering a part of stored data, whether the obtained data is consistent with the data obtained by the electric meter or not is judged by reading back the stored data, and the correctness of the load curve is further judged; by the method for testing the load curve of the electric meter, the data type of the load curve of the electric meter is fully covered by national standards, and the data is stored and recorded completely; meanwhile, the adjustment of testing tools and testing environments by testing personnel is reduced, the method is realized through software control, the method is simple, reasonable in structure and ingenious in concept, the concept of intelligent testing is introduced, a method designed in advance is adopted, and a user participates in software configuration through mode switching to complete the required functions. The labor cost of an enterprise is saved as the work of a tester is reduced; meanwhile, the product quality is improved by omnibearing functional test instead of sampling test; the problem is analyzed by combining a computer, so that the data of the test parameters are more accurate and real without visual observation and manual calculation.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A method for detecting the correctness of a metering load curve of an electric meter is characterized by comprising the following steps:
the system receives an instruction input by a user, and configures test parameters and test conditions of the ammeter;
respectively setting freezing frequencies of various test parameters;
the system starts load recording, and circulates for N times, wherein N is more than 288, and the data of the test parameters are stored;
respectively reading the load curve stored each time by the system, comparing the load curve with a preset condition, and if the load curve does not meet the preset condition, outputting an error prompt of the load curve by the system;
if the load curve meets the preset condition, the system sequentially reads back the last 288 times of data in the stored data of the test parameters and judges whether the data of the test parameters are qualified, and if not, the system outputs an error prompt of the load curve;
if the test parameters are qualified, the system circulates for M times again, 99 load record data are read, and whether the data of the test parameters are consistent with the data calculated by the ammeter or not is judged, wherein M is more than 99;
if the test parameters are consistent, outputting the data of the test parameters to meet the requirements;
the steps are sequentially repeated until the data of various test parameters of the electric meter are tested; and if the data of the various tested test parameters meet the requirements, outputting the correct load curve, wherein the preset conditions comprise a preset voltage vector, a preset current vector and a power factor.
2. The method for detecting the correctness of the metering load curve of the electric meter according to claim 1, characterized in that: the test parameters comprise voltage/current/frequency, active power, power factor and total electric quantity.
3. The method for detecting the correctness of the metering load curve of the electric meter according to claim 2, characterized in that: the test parameters also include quadrant reactive and current demand.
4. The method for detecting the correctness of the metering load curve of the electric meter according to claim 3, characterized in that: the test parameters also include the recording time of the load curve.
5. The method for detecting the correctness of the metering load curve of the electric meter according to claim 1, characterized in that: the test conditions include test voltage, current, and phase angle.
6. The method for detecting the correctness of the metering load curve of the electric meter according to claim 5, wherein the method comprises the following steps: the test voltage comprises a normal voltage and/or a critical loss of voltage and/or an excess voltage.
7. A system for detecting the correctness of a metering load curve of an electric meter is characterized by comprising:
the system comprises an initial setting module, a power supply module and a power supply module, wherein the initial setting module is used for executing the steps that the system receives an instruction input by a user and configuring test parameters and test conditions of an ammeter; respectively setting freezing frequencies of various test parameters;
the data testing module is used for executing the step that the system starts load recording, circulating for N times, wherein N is larger than 288, and storing the data of the testing parameters; respectively reading the load curves stored each time by the system, and comparing the load curves with preset conditions;
the data judgment module is used for executing the step, if the load curve does not meet the preset condition, the system outputs the load curve error prompt; if the load curve meets the preset condition, the system sequentially reads back the last 288 times of data in the stored data of the test parameters and judges whether the data of the test parameters are qualified, and if not, the system outputs an error prompt of the load curve;
if the test parameters are qualified, the system circulates for M times again, 99 load record data are read, and whether the data of the test parameters are consistent with the data calculated by the ammeter or not is judged, wherein M is more than 99;
if the test parameters are consistent, outputting the data of the test parameters to meet the requirements; the steps are sequentially repeated until the data of various test parameters of the electric meter are tested;
and if the various types of measured data meet the requirements, outputting the correct load curve, wherein the preset conditions comprise a preset voltage vector, a preset current vector and a power factor.
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| CN109061548B (en) * | 2018-10-12 | 2021-11-09 | 山东计保电气有限公司 | Integral online checking method for high-voltage electric energy metering device |
| CN114167341B (en) * | 2021-11-26 | 2023-09-15 | 国网江苏省电力有限公司南京供电分公司 | Online monitoring and tracking method for precision misalignment of electric energy meter based on user load characteristic change |
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| CN102831488B (en) * | 2012-08-17 | 2015-12-09 | 华北电力大学 | Based on the Methods of electric load forecasting of the grey method improved |
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