KR102030836B1 - Apparatus and method for test of watt-hour meter - Google Patents

Abstract

The present invention relates to a power meter test apparatus and a method thereof, comprising: a load input unit configured to provide a plurality of power meters with a load value including any one of voltage, power, and phase; And a electricity meter tester configured to control communication between the electricity meter and the load input unit, and to operate a process of performing a test of the built-in virtual electricity meter and the electricity meter to determine suitability of the electricity meter.

Description

Power meter test apparatus and its method {APPARATUS AND METHOD FOR TEST OF WATT-HOUR METER}

The present invention relates to a power meter test apparatus and a method thereof, and a process operation apparatus and method applied thereto. More particularly, the present invention relates to an improvement of a power meter test procedure for a suitability determination and to an error problem that may be caused by an improvement of a test procedure. The present invention relates to a power meter test apparatus and method for providing an algorithm for determination and a process operation apparatus and method applied thereto.

The electricity meter is an instrument that measures electricity consumption, and is installed in the place where electricity is used as well as general households, and it is a standard that measures and charges electricity consumption through this. Electricity meters are classified into inductive and electronic wattmeters according to the operation method.The electronic wattmeter is used in home and industrial field to measure power consumption like the inductive wattmeter. The biggest feature is that it can measure various related values and provide various additional functions in combination with the recently rising remote metering system.

Currently, electronic electricity meters are being supplied to about 160,000 high-voltage customers in Korea, and they are extremely low to 18 million low-voltage customers, and according to the remote meter reading business plan, all 18 million units are low-voltage electronic electricity meters by 2020. The replacement will be completed. At this time, since a lot of electricity meters are installed in a wide area, it is necessary to secure quality through thorough testing before on-site installation, as it requires huge cost and time even for minor error correction. In the test, not only hardware functional tests verifying electrical, electronic, mechanical, and physical characteristics, but also software functional tests to verify the suitability and communication functions of weighing instruments are required. In particular, since the software function is closely related to the billing information such as the power consumption and the maximum demand power, the intelligent electricity meter having various and complex information needs more systematic verification.

Recently, an intelligent electronic meter (hereinafter referred to as intelligent meter) is being introduced and developed to support the next generation remote metering and smart grid, and the intelligent meter is a bi-directional metering (electric power, transmission), quality (voltage, More than 4 times more information than the standard power meter to support advanced functions such as current, phase and THD measurement functions, various tariff plans (maximum peak tariff, timed tariff, real-time tariff, etc.) and remote control (remote load switching etc.) As it operates over 300 highly complex information, it takes much more time for comparison analysis and judgment as well as test time.

In addition, in the verification of the function of the intelligent electricity meter, it is not only the accuracy of measurement to accurately measure the power supply and transmission mode, but also the operation by the program having the information such as the TOU, the metering parameter, and the like. Do you record the history of the events that occur according to the swell, phase loss, etc., and whether the function of the electricity meter is operating correctly even in the event of program change, time change, and conquest etc. Verification is required. In other words, it is necessary to check whether the meter reading and the normal weighing occur under any circumstances such as time change, conquest before and communication with the outside.

The power amount, which is the information of the electricity meter, stores the accumulated pulse value as the energy amount data.When the date time changes, program input or change among the functions of the electricity meter, the SR (Self-Reading, Self-Reading) occurs every time the meter reading occurs. The function that generates (Demand Reset) is an important indicator used as basic information for calculating power consumption and maximum demand power. When the SR is generated once in the current month, the monthly power amount is generated. When the SR is generated once more (twice), the previous month's power is generated while the previous month's power is generated. The electricity usage fee is calculated by multiplying the electricity consumption (monthly amount of electricity-monthly quantity of electricity) by the unit price. In addition, the generation of DR is a function of returning the demand power can derive the maximum demand power within a certain period, and additional fees such as penalties may be imposed depending on whether the contract power is exceeded. Inaccurate power consumption and billing may cause complaints, such as customer complaints, so that the accuracy of the function operation required by the electricity meter specification is verified in advance, improving the reliability of the electricity meter function to 99.9% or more. It is quite important. As a result, normal meter reading (SR, DR) occurs even when the electricity meter operating in the field changes time between regular meter reading days, when conquest occurs, or during frequent communication with the outside. Test scenarios should fully verify each function.

In order to secure the quality of intelligent electricity meters, much more than tens of steps are required, and comparison, analysis, and determination are required. When determining the result value for more than 300 complex information each time, it is possible to improve the reliability by reducing the possibility of error and judgment error caused by manpower, and to compare, analyze and judge the result value for more than 300 complex information by human resource. Therefore, it takes considerable time, so it is necessary to develop a test system that can increase the processing capacity to cope with this.

As a representative way to shorten the test time required and increase the processing capacity, as disclosed in Korean Patent Laid-Open Publication No. 2011-0038861, a test system capable of parallel processing of a plurality of tests has been developed. If a problem occurs in some meters, there was a problem that may affect other meters.

The present invention has been invented to solve the above problems, and provides a power meter test apparatus and method thereof, and a process operating apparatus and method for improving the test procedure in order to ensure the accuracy of the determination of the electricity meter. There is a purpose.

In addition, an object of the present invention is to provide a power meter test apparatus and method thereof, and a process operation apparatus and method applied thereto, which provide a suitability determination algorithm for comparing a test result of a virtual meter and a test result of a test meter.

In addition, the present invention, by adding a synchronization step to the test procedure, in addition to the sequential test, random test, re-test on the failed test items, instrument information initialization and time information so that the previous test does not affect the next test It is an object of the present invention to provide an electricity meter test apparatus and method for performing synchronization, and a process operation apparatus and method applied thereto.

In order to achieve the above object, a wattmeter test apparatus according to an embodiment of the present invention includes a load input unit providing a load value including any one of voltage, current, and phase to a plurality of wattmeters; And a wattmeter tester configured to control communication between the wattmeter and the load input unit and to perform a test for determining suitability of the wattmeter using a pre-programmed virtual wattmeter. A communication control unit which collects measurement and management information of the electricity meter while controlling communication between the electricity meter and the load input unit; An analysis processing unit for analyzing and processing the collected measurement and management information; A storage conversion unit for converting and storing the analyzed and measured information according to a data type; And a process operating unit operating the process based on the stored and stored measurement and management information, wherein the process operating unit includes: a connection setting unit configured to establish a connection between the electricity meter and the load input unit; A synchronization unit for initializing meter information and synchronizing time information at each test of the electricity meter or the virtual electricity meter; A setting information changing unit which changes setting information of the test scenario; A test performer configured to test the electricity meter and the virtual electricity meter according to the test scenario; A result collector configured to collect test results of the electricity meter and the virtual electricity meter; An suitability determination unit for comparing suitability of the electricity meter by comparing test results of the electricity meter and the virtual electricity meter; And a disconnection unit for releasing the connection between the wattmeter and the load input unit.

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In addition, the measurement and management information may include instrument basic information, power information, maximum demand power, LP (Load Profile), history recording, self-diagnosis, average voltage current, current time of use, reservation TOU, current and reservation program It characterized in that it comprises any one of the individual setting value.

In addition, the process operation unit is characterized in that the process is set to the load input, synchronization, setting information change, test execution, information collection, load determination and load shedding step.

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The test execution unit is characterized in that any one of the transmission and reception of the measurement value verification test, instantaneous measurement value test, maximum demand power test, meter reading function test and TOU test.

In addition, the suitability determining unit compares the test results of the electricity meter and the virtual electricity meter and determines that the electricity meter is suitable if the error is within a preset error range, and determines that the electricity meter is inappropriate if it is not included in the preset error range. Characterized in that.

In addition, the virtual electricity meter is characterized in that it is programmed based on the steady state of the electricity meter.

In order to achieve the above object, a power meter test method according to an embodiment of the present invention includes providing a load value including any one of voltage, current, and phase to a plurality of power meters by a load input unit; And controlling, by the electricity meter tester, communication between the electricity meter and the load input unit, and performing a test for determining suitability of the electricity meter using a pre-programmed virtual electricity meter. Controlling communication between the electricity meter and the load input unit, and operating a process for performing a test to determine the suitability of the electricity meter using a pre-programmed virtual electricity meter, the communication between the electricity meter and the load input unit Collecting measurement and management information of the electricity meter; Analyzing and processing the collected measurement and management information; Converting and storing the analyzed and measured information according to a data type; And operating the process on the basis of the converted stored measurement and management information, and operating the process on the basis of the converted stored measurement and management information, setting a connection of the electricity meter and the load input unit. Making; Synchronizing meter information initialization and time information every time the power meter or the virtual power meter is tested; Changing setting information of the test scenario; Performing a test of the electricity meter and the virtual electricity meter according to the test scenario; Collecting test results of the electricity meter and the virtual electricity meter; Comparing the result of performing the test of the electricity meter and the virtual electricity meter to determine whether the electricity meter is appropriate; And disconnecting the power meter from the load input unit.

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The testing of the electricity meter and the virtual electricity meter according to the test scenario may include performing any one of a measurement value verification test, an instantaneous measurement value test, a maximum demand power test, a metering function test, and a TOU test of transmission and reception. It is characterized by.

Further, in the step of comparing the results of the test of the electricity meter and the virtual electricity meter to determine the suitability of the electricity meter, by comparing the results of the test results of the electricity meter and the virtual electricity meter, if the error is within a predetermined error range, the electricity meter is If it is determined that it is suitable, and it is not included in the preset error range, it is characterized in that the electricity meter is determined to be inappropriate.

In addition, the virtual electricity meter is characterized in that it is programmed based on the steady state of the electricity meter.

The electricity meter test apparatus and method thereof according to the present invention having the configuration described above, and a process operation apparatus and method applied thereto can shorten the test time by improving the test procedure to ensure the accuracy of the acceptance of the electricity meter. It works.

In addition, the present invention provides an appropriate decision algorithm for comparing the test results of the virtual electricity meter and the test results of the test meter, there is an effect that it is possible to reduce the error range due to the suitability determination caused by the shortening of the test time.

In addition, the present invention, by adding a synchronization step to the test procedure, in addition to the sequential test, random test, re-test on the failed test items, instrument information initialization and time information so that the previous test does not affect the next test By performing the synchronization, there is an effect that the suitability determination algorithm can be simplified.

1 is a view for explaining the configuration of a power meter test apparatus according to an embodiment of the present invention.
2A to 2C are diagrams for explaining types of information managed by an electricity meter according to an embodiment of the present invention.
3 is a view for explaining the detailed configuration of the wattmeter test unit employed in the wattmeter test apparatus according to an embodiment of the present invention.
4 is a view for explaining the detailed configuration of the process operation unit employed in the electricity meter test unit of FIG.
FIG. 5 is a diagram for explaining a suitability determination algorithm applied to the suitability determination unit employed in the wattmeter test unit of FIG. 3.
6 is a view for explaining the instantaneous power meter test method according to an embodiment of the present invention.
7 is a view for explaining the instantaneous generation of the normal meter reading and the normal meter confirmation test method in the power meter test method according to an embodiment of the present invention.
FIG. 8 is a diagram illustrating results of LP information for viewing power error information of five patterns in one minute period during the test process of FIG. 7.
FIG. 9 is a diagram illustrating a result of LP information for viewing time synchronization error information of five patterns of a minute period during the test process of FIG. 7.
FIG. 10 is a diagram illustrating a comparison table of a plurality of power meter values that may occur during the test process of FIG. 7.
FIG. 11 is a diagram for describing an error occurring when a load is applied during the test process of FIG. 7.

Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention. . First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are designated as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, a power meter test apparatus according to an embodiment of the present invention, a method thereof, a process operation apparatus applied thereto, and a method thereof will be described in detail with reference to the accompanying drawings.

1 is a view for explaining the configuration of a power meter test apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the electricity meter test apparatus according to the present invention includes a load input unit 120 and an electricity meter test unit 140.

The load input unit 120 provides a load value including any one of voltage, current, and phase to the plurality of power meters 110a... 110n. The load input unit 120 supplies load values required for on / off and testing to the electricity meters 110a... 110n according to the process and the scheduled time set in the present invention. On the other hand, a plurality of power meters (110a ... 110n) is connected to the terminal block, respectively, and performs the test while recording the history of events such as program input, time change, conquest before the set process scheduling.

The electricity meter test unit 140 controls a communication between the electricity meters 110a... 110n and the load input unit 120, and determines a suitability of the electricity meters 110a... 110n using the pre-programmed virtual electricity meter 130. Operate. The electricity meter test unit 140 operates a process while performing serial communication such as RS232 or RS422 / RS485 to control communication between the electricity meters 110a... 110n and the load input unit 120. In this case, the electricity meter test unit 140 may be mounted on a desktop or notebook PC, and a virtual electricity meter 130 is pre-programmed based on the normal state of the electricity meter.

2A to 2C are diagrams for explaining types of information managed by an electricity meter according to an embodiment of the present invention.

2A to 2C, the setting information change and event occurrence details for the test during the test execution according to the present invention are recorded in the electricity meters 110a through 110n, and the electricity meters 110a through 110n are shown in FIG. As shown, basic instrument information (measurement time, manufacturer ID, meter ID, instrument constant, etc.) and power quantity information (current validity / invalidity / apparent / power factor of current month / previous month / previous month / previous month), reverse effective / invalid / apparent / power factor information ), Maximum demand power (current / previous month / previous month / previous month, effective / apparent maximum demand power and occurrence time), LP, history record, self-diagnosis, average voltage current, current and reservation TOU, current and reservation program, individual It stores and manages about 300 pieces of information, including settings. For example, when the instrument information initialization of the electricity meters 110a… 110n is executed, all instrument information except the current date time should be initialized when the instrument is initialized, and the initialization history is increased at the time of initialization and for each type of electricity meters 110a… 110n. It should be set to the default setting, and it is necessary to check whether it has the same result as the measurement and management information of FIG. In order to confirm this, a reference value is required, and the present invention includes a virtual electricity meter 130 and compares the result of the test of the electricity meters 110a ... 110n by using the test performance result of the virtual electricity meter 130 as a reference value.

3 is a view for explaining the detailed configuration of the wattmeter test unit employed in the wattmeter test apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the wattmeter tester 140 according to the present invention controls the communication between the wattmeters 110a... 110n and the load input unit 120, and is built to determine suitability of the wattmeters 110a. The process of performing the test of the virtual meter 130 and the meter (110a ... 110n) is operated.

To this end, the electricity meter test unit 140 includes a communication control unit 141, an analysis processing unit 142, a storage conversion unit 143, and a process operation unit 150.

The communication control unit 141 collects measurement and management information of the electricity meters 110a... 110n while controlling the communication between the electricity meters 110a... 110n and the load input unit 120. The communication control unit 141 controls the load input unit 120 to automatically supply and cut off the load to the electricity meters 110a... 110n and set necessary information for each process operation in the electricity meters 110a .. 110n to collect through DLMS communication. .

The analysis processing unit 142 analyzes and processes the collected measurement and management information. The analysis processing unit 142 analyzes and processes the frames of the collected measurement and management information. The analysis processing unit 142 assembles and disassembles the collected measurement and management information frames and analyzes and processes them based on the DLMS protocol system.

The storage conversion unit 143 converts and stores the analyzed measurement and management information according to the data type.

The process operation unit 150 operates a process based on the converted and stored measurement and management information. The process operation unit 150 sets the process to load input, synchronization, setting information change, test execution, information collection, load determination, and load shedding. This will be described in detail later with reference to FIG. 4.

4 is a view for explaining the detailed configuration of the process operation unit employed in the electricity meter test unit of FIG.

Referring to FIG. 4, the process operation unit 150 according to the present invention sets a process to load input, synchronization, setting information change, test execution, information collection, load determination, and load shedding.

To this end, the process operation unit 150 includes a connection setting unit 151, a synchronization unit 152, a setting information changing unit 153, a test execution unit 154, a result collection unit 155, and a suitability determination unit 156. ) And a connection release unit 157.

The connection setting unit 151 sets the connection between the wattmeters 110a... 110n and the load input unit 120. The connection setting unit 151 sets a process operation preparation state by providing a load value including any one of voltage, current, and phase to the wattmeters 110a.

The synchronization unit 152 performs meter information initialization and time information synchronization every time the power meter 110a ... 110n is tested. The synchronization unit 152 performs synchronization to test a plurality of power meters 110a... 110n at the same time. In order to verify the complex and various functions of the power meters 110a. Information initialization ensures that the previous test is not affected by the next test. In addition, the synchronization unit 152 performs time-testing of the virtual electricity meters 130 and the electricity meters 110a ... 110n by synchronizing the time information of the plurality of electricity meters 110a. Make sure you compare the results accurately. At this time, even if time information synchronization is performed, the time between the virtual electricity meter 130 and the electricity meters 110a... 110n may vary by 1 to 3 seconds, but 1 to 3 in the event occurrence time information of the electricity meters 110a. It does not affect the error range of about a second.

The setting information changing unit 153 changes setting information of the test scenario. The setting information changing unit 153 changes the load change and the instrument setting control such as voltage, current, phase, duration, and program input according to the test scenario. For example, the setting information changing unit 153 may turn on the power meters 110a ... 110n by supplying 220V and 0A when providing a load, and may set current inputs such as 10A, 20A, and 30A when the process is in a standby state. On the other hand, the phase information can be set to -90 ° to 90 ° to receive power generation amount, input from 90 ° to 270 ° to set the two-way measurement of power reception and transmission so that the amount of power transmission. In addition, the instrument configuration can set the initial program input and LP recording cycle change according to various events of the test scenario.

The test performing unit 154 performs a test of the electricity meters 110a... 110n according to the test scenario. The test execution unit 154 checks the measured value of the power transmission and reception, instantaneous measured value test, maximum demand power test, and metering function based on a program change and reservation, a change in instrument time, a power recovery, and a communication state according to a test scenario. Perform tests, TOU tests, etc.

The result collecting unit 155 collects test results of the electricity meters 110a... 110n. The result collecting unit 155 collects information measured by the wattmeters 110a through 110n through full or partial reading of the wattmeters 110a through 110n measurement and management information in order to compare test results.

The suitability determination unit 156 compares the test results of the electricity meters 110a... 110n and the virtual electricity meters 130 to determine suitability of the electricity meters 110a. The suitability determination unit 156 compares the test performance result with the test performance result of the virtual power meter 130 to determine whether the power meters 110a...

The disconnection unit 157 disconnects the power meters 110a... 110n from the load input unit 120.

Here, the virtual electricity meter 130, in order to determine the suitability of the electricity meters (110a ... 110n), similar to the electricity meters (110a ... 110n) through the process operation unit 150 described above, load input, synchronization, setting information change, test execution And information collection is performed at the same time.

FIG. 5 is a diagram for explaining a suitability determination algorithm applied to the suitability determination unit employed in the wattmeter test unit of FIG. 3.

Referring to FIG. 5, the suitability determination unit according to the present invention compares the test results of the electricity meters 110a... 110n and the virtual electricity meters 130 to determine suitability of the electricity meters 110a. To this end, the adequacy determination unit compares the results of the tests performed by the electricity meters 110a... 110n and the virtual electricity meters 130, and determines that the electricity meters 110a... 110n are suitable if the error is within a preset error range. If it is not included, a suitability determination algorithm that determines that the wattmeters 110a... 110n is inappropriate is used.

The suitability determination algorithm is a method of determining suitability through a comparison operation between the test results of the virtual electricity meter 130 and the test results (± error range) of the power meters 110a. In this algorithm, the test results of one virtual electricity meter 130 when the multiple electricity meters 110a ... 110n are tested at the same time are used as reference values for determining suitability of the electricity meters 110a ... 110n. It is a method of performing the suitability determination through the comparison result with the execution result (including the error range) and it is more efficient than the existing method because it does not need separate storage and calculation for each electricity meter (110a… 110n), and tests on the reference value of the virtual electricity meter 130. It is possible to increase the reliability of the suitability decision through error compensation that can solve various error factors that can occur by reducing the time required.

In more detail, it is possible to compensate the error of the test load equipment (company A, company B, company C, etc.). That is, the test load equipment also has an error of the equipment itself, and compensates the load output error rate to the test performance result of the virtual electricity meter 130 and calculates it through Equation 1 below.

In this case, X means the load output error rate.

를 두어 시간변동에 따른 부하변동의 시험데이터를 활용하여 산출한다. 예를들어 전력량은 전력×사용시간 또는 펄스값÷계기정수로 계산될 수 있으며, 10A를 투입시 1A가 출력되는데 몇 초 걸리고 몇 펄스가 기록이 되는지, 2A가 출력되는 데 몇 초 걸리고 몇 펄스가 기록되는지, 3A가 출력되는데 몇 초 걸리고 몇 펄스가 기록 되는지, 10A가 출력되는데 몇 초 걸리고 몇 펄스가 기록되는지 부하변동에 따른 시험데이터를 활용하여 산출함으로 real 값에 거의 근사하게 계산된다.And it can compensate for the difference between the ideal value and the real value. The exponential increase and decrease of the load output at the start and end of the load input is to reduce the test time.When the LP recording period is set to 1 minute, the power error in the first or second section after the load is out of the error range. One of the possible error factors is the function that calculates the load output over time by using Equation 2 below.

Calculate using test data of load variation over time. For example, the amount of power can be calculated as power × operating time or pulse value ÷ instrument constant.When 10A is input, how many seconds it takes to output 1A and how many pulses are recorded, how many seconds it takes to output 2A and how many pulses Whether it is recorded, how many seconds it takes to output 3A and how many pulses are recorded, how many seconds it takes to output 10A, and how many pulses are recorded is calculated by using the test data according to the load variation.

And it can compensate the start time of instrument measurement such as conquest, initialization, program input. Due to the event such as power failure, initialization, program input, etc., according to the test scenario, the characteristics are different for each of the electricity meters 110a… 110n due to parameter setting and rising time which cannot be defined in the standard. The difference in the time it takes for 110a… 110n) to start weighing is an error that the power error can be out of the error range in the first or second section after load is applied when setting the LP recording period to 1 minute to shorten the test time. It becomes one of the factors. To compensate for this, the error range can be reduced by compensating the measurement start time by reading a time gap in which the power meters 110a ... 110n start measurement through Equation 3 below. The time it takes for each meter 110a… 110n to start measurement when testing a plurality of meter meters 110a… 110n may be different, which is an error by applying the measurement time of the slowest meter 110a… 110n. Allows you to adjust the range flexibly.

6 is a view for explaining the instantaneous power meter test method according to an embodiment of the present invention.

Referring to FIG. 6, a power meter test method according to an embodiment of the present invention includes a power meter test apparatus including a plurality of power meters 110a... 110n, a load input unit 120, and a power meter test unit 140. 100 to control the communication between the electricity meters 110a... 110n and the load input unit 120, and determine whether the electricity meters 110a. The process of performing the test is operated, and overlapping description thereof will be omitted.

First, a load is input to establish a connection between the electricity meters 110a... 110n and the load input unit 120 (S100). In step S100, a load value including any one of a voltage, a current, and a phase is provided to the wattmeters 110a.

Next, the meter information is initialized and time information is synchronized every time the power meter 110a ... 110n is tested. (S110) In step S110, synchronization is performed to simultaneously test a plurality of power meter 110a ... 110n. In order to verify the complex and versatile functions of… 110n), the initialization of instrument information for each N-level test ensures that the previous test is not affected by the next test. In addition, the synchronization unit 152 synchronizes time information of the plurality of power meters 110a... 110n using functions such as time change of the power meters 110a... 110n to test the virtual meter 130 and the meters of electricity 110a. Allows you to compare performance results accurately. At this time, even if the time information is synchronized, the time between the virtual electricity meter 130 and the electricity meters 110a... 110n may be different from 1 to 3 seconds, but in the event occurrence time information of the electricity meters 110a. It does not affect the error range of about 3 seconds. However, in LP recording at 1 minute intervals (which has a record of LP information every 1 minute), this may be a problem for payment. For example, if an event occurs at XX: 04: 0, an LP is created and contains information at 04 minutes. The reference value is recorded as XX hour 04 minutes 0 seconds for the event occurrence time and has one LP information at 04 minutes, but the electricity meters 110a… 110n can record XX hours 03 minutes 59 seconds or 04 minutes 1 second, which is 04 Not only one LP information is generated in a minute, but additional LP is generated in 03 minutes 59 seconds or 04 minutes 01 seconds. Therefore, in order to solve the problem that may occur due to time synchronization error in step S110, not only the time change but also the occurrence of all events and setting information for the test occur every ± 10 seconds, so that the comparative analysis can be smoothly within the error range for time. Proceed to facilitate suitability determination.

Next, the setting information of the test scenario is changed (S120). In step S120, the load change and the instrument setting control such as voltage, current, phase, duration, and program input are changed according to the test scenario. For example, the setting information changing unit 153 inputs 220V and 0A at the time of providing a power meter. (110a… 110n) If the process is in the standby state by turning on the power, current input such as 10A, 20A, 30A can be set, while the phase information is input from -90 ° to 90 ° to generate power received from the faucet, 90 ° to 90 °. Enter 270 ° to enable two-way measurement of the faucet and the faucet so that the amount of transmit power is generated. In addition, the instrument configuration can set the initial program input and LP recording cycle change according to various events of the test scenario.

Next, a test of the electricity meters 110a ... 110n is performed according to the test scenario (S130). Step S130 is based on test scenarios, program change and reservation, instrument time change, power recovery, communication status, etc., based on the measurement value check of power transmission and reception, instantaneous measurement value test, maximum demand power test, meter reading function test, TOU test And so on. Step S130 collects the information measured in the electricity meter (110a ... 110n) through the full or partial metering of the meter and 110a measurement and management information to compare the test results. At this time, according to the test scenario, the process may proceed back to step S130 from step S140 to step S120, or after step S150 to go back to step S120, and may proceed to step S130, and may proceed to step S130 after step S150 to step S130. .

Next, test results of the electricity meters 110a... 110n are collected.

Next, the test results of the electricity meters 110a... 110n and the virtual electricity meters 130 are compared to determine suitability of the electricity meters 110a... 110n. (S150) In operation S150, the test results of the virtual electricity meters 130 are tested. It is determined whether or not the wattmeters 110a... At this time, it is possible to manage not only the result of the test but also the load input and power meter (110a… 110n) control and communication result to distinguish the operation function of electricity meter. Through the power meter 110a ... 110n can be easily tested.

Finally, the power meters 110a... 110n are disconnected from the load input unit 120 (S160).

7 is a view for explaining the instantaneous generation of the normal meter reading and the normal meter confirmation test method in the power meter test method according to an embodiment of the present invention.

Referring to FIG. 7, the normal meter reading and the normal weighing test during communication with the outside make a test standby state by turning on the power of the power meters 110a. In the next synchronization step, time information and instrument initialization are performed to initialize the instrument information and synchronize the time information (S210). Next, in the setting information change step, the program for testing is input, the LP recording period is set to 1 minute, and the load is changed to 10A and input (S220). In the next test execution step, the test is performed for 5 minutes, and at this time, the state of communication with the outside makes the electricity meters 110a… 110n internally very busy (S230). In the next information collection step, all the information of the test result is collected by the full meter reading, and then the next suitability determination step is performed (S240). In the suitability determination step, all measurement and management information of the wattmeters 110a... 110n as shown in FIG. 2 is analyzed (S250). In the analysis, the process proposed by the present invention is operated to compare and analyze the test performance result of the virtual electricity meter 130 embedded in the electricity meter test unit 140 with the test performance result of the electricity meters 110a. Then, the load is cut off (S260).

FIG. 8 is a diagram illustrating results of LP information for viewing power error information of five patterns of one minute period during the test process of FIG. 7, and FIG. 9 is a time of five patterns of minute cycles of the test process of FIG. 7. It is a figure which shows the result of LP information for viewing synchronization error information.

Referring to FIG. 8, the analysis of the LP is easy for the tester to intuitively analyze the test scenario, and the test result of the LP information among the above test results is as shown in FIG. 8. LP information has index, date / time, status information, forward valid / invalid ground / invalid phase / apparent power amount, and the power amount information records the accumulated pulse value. For example, if the pulse value currently recorded in the electricity meters 110a ... 110n having an instrument constant of 1,000 pulses / kwh is 2,000, the current power consumption is 2 kwh. The LN present in the state information of all the indexes is information indicating the latch on state indicating the state information of the electricity meters 110a ... 110n controlled by the latch, and the state information LF, LN, P of the index 1 when the instrument is initialized. It shows LF (Latch Off) status that occurs, P status generated by initial program input. The section in which the recording of the cumulative pulse value started is index 3, indicating that the load input has started after the section 2 of the index, and that the normal reading occurs through the status information LN, SR, and DR in the index 9. At this time, the cumulative pulse value of the first section where load is started may have a large error compared to the reference value (the result of the test of the virtual electricity meter). 9 illustrates a problem that may occur due to time synchronization error. The hatched portions in FIG. 8 mean power error not included in the preset error range, and the hatched portions in FIG. 9 mean time synchronization errors not included in the preset error range. 8 and 9, SR means meter reading, DR returns to demand power, P means program change, LN means LatchON, and LF means LatchOff.

FIG. 10 is a diagram illustrating a comparison table of a plurality of power meter values that may occur during the test process of FIG. 7, and FIG. 11 is a diagram for describing an error occurring when a load is generated during the test process of FIG. 7. .

Referring to FIG. 10, power meters adjacent to each other may fail because a value outside the error range occurs not only in the first section but also in the second section after the load is input. As shown in FIG. 11, the error may occur due to the difference between the Real value and the Ideal value when the load is output in the initial stage of load input, and events such as conquest, initialization, and program input that may occur due to a test scenario. Due to the parameter setting and rising time which cannot be defined in the standard, the characteristics are different for each of the electricity meters 110a… 110n. Errors may occur. Accordingly, the present invention proposes a suitability determination algorithm including a virtual electricity meter 130 to compensate for an error factor by using a test result of the virtual electricity meter 130.

As described above, the electricity meter test apparatus and method thereof, and the process operation apparatus and method applied thereto according to the present invention can shorten the test time by improving the test procedure to ensure the accuracy of the acceptance of the electricity meter.

In addition, the present invention provides a suitability determination algorithm for comparing the test result of the virtual watt-hour meter with the test result of the test watt-hour meter, thereby reducing the error range due to the suitability decision caused by the shortening of the test time.

In addition, the present invention, by adding a synchronization step to the test procedure, in addition to the sequential test, random test, re-test on the failed test items, instrument information initialization and time information so that the previous test does not affect the next test By performing the synchronization, the suitability determination algorithm can be simplified.

In the above, the preferred embodiment according to the present invention, but can be modified in various forms, those skilled in the art various modifications and modifications without departing from the claims of the present invention It is understood that the present invention may be implemented.

100: power meter test device
110: power meter 120: load input unit
130: virtual electricity meter 140: electricity meter test unit

Claims (14)

A load input unit configured to provide a plurality of power meters with a load value including any one of voltage, current, and phase; And
And a power meter test unit configured to control communication between the power meter and the load input unit, and to perform a test for determining suitability of the power meter using a pre-programmed virtual power meter.
The electricity meter test unit may include: a communication controller configured to collect measurement and management information of the electricity meter while controlling communication between the electricity meter and the load input unit; An analysis processing unit for analyzing and processing the collected measurement and management information; A storage conversion unit for converting and storing the analyzed and measured information according to a data type; And a process operation unit configured to operate the process based on the converted and stored measurement and management information.
The process operation unit may include: a connection setting unit configured to set a connection between the electricity meter and the load input unit; A synchronization unit for initializing meter information and synchronizing time information at each test of the electricity meter or the virtual electricity meter; A setting information changing unit which changes setting information of the test scenario; A test performer configured to test the electricity meter and the virtual electricity meter according to the test scenario; A result collector configured to collect test results of the electricity meter and the virtual electricity meter; An suitability determination unit for comparing suitability of the electricity meter by comparing test results of the electricity meter and the virtual electricity meter; And a disconnection unit for releasing the connection between the electricity meter and the load input unit. delete The method of claim 1,
The measurement and management information includes instrument basic information, power information, maximum demand power, load profile (LP), history record, self-diagnosis, average voltage current, current time of use, reservation TOU, current and reservation program, individual An electricity meter test apparatus comprising any one of setting values. The method of claim 1,
The process operating unit is a power meter test device, characterized in that for setting the process in the step of load input, synchronization, setting information change, test execution, information collection, load determination and load shedding. delete The method of claim 1,
The test performing unit performs a power meter test device, characterized in that any one of the measurement value verification test, instantaneous measurement value test, maximum demand power test, meter reading function test and TOU test. The method of claim 1,
The suitability determination unit compares the test results of the electricity meter and the virtual electricity meter and determines that the electricity meter is suitable if the error is within a preset error range, and determines that the electricity meter is inappropriate if it is not included in the preset error range. Power meter test device, characterized in that. The method of claim 1,
And the virtual meter is programmed based on the steady state of the meter. Providing, by the load input, a load value comprising any one of voltage, current and phase to the plurality of wattmeters; And
And controlling, by the meter tester, communication between the meter and the load input unit, and performing a test for determining suitability of the meter using a pre-programmed virtual meter.
Controlling communication between the electricity meter and the load input unit, and operating a process for performing a test to determine the suitability of the electricity meter using a pre-programmed virtual electricity meter, the communication between the electricity meter and the load input unit Collecting measurement and management information of the electricity meter; Analyzing and processing the collected measurement and management information; Converting and storing the analyzed and measured information according to a data type; And operating the process based on the converted stored measurement and management information.
Based on the stored and stored measurement and management information, operating the process may include establishing a connection between the electricity meter and the load input unit; Synchronizing meter information initialization and time information every time the power meter or the virtual power meter is tested; Changing setting information of the test scenario; Performing a test of the electricity meter and the virtual electricity meter according to the test scenario; Collecting test results of the electricity meter and the virtual electricity meter; Comparing the result of performing the test of the electricity meter and the virtual electricity meter to determine whether the electricity meter is appropriate; And releasing the connection between the electricity meter and the load input unit. delete delete The method of claim 9,
The testing of the electricity meter and the virtual electricity meter according to the test scenario may include:
A power meter test method comprising any one of a measurement value verification test, an instantaneous measurement value test, a maximum demand power test, a meter reading function test, and a TOU test of transmission and reception. The method of claim 9,
In the step of determining the suitability of the electricity meter by comparing the test results of the electricity meter and the virtual electricity meter,
Comparing the test results of the electricity meter and the virtual electricity meter and determines that the power meter is suitable if the error is within a preset error range, and if it is not included in the preset error range, the electricity meter is determined to be inappropriate. Test Methods. The method of claim 9,
The virtual electricity meter is programmed based on the steady state of the electricity meter.

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