CN106443567A - Real-load test system for electric energy meters - Google Patents
Real-load test system for electric energy meters Download PDFInfo
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Abstract
本发明涉及一种电能表的实负载测试系统，包括上位机，上位机与中心控制板双向通讯，所述中心控制板分别与用于对单相被检电能表进行误差测试的单相误差测试装置、用于对三相被检电能表进行误差测试的三相误差测试装置双向通讯，所述中心控制板向单相误差测试装置和三相误差测试装置供电。本发明能够采用模拟现场用电的真实负载，在实际用电情况下测试电表的计量误差；本发明能够输出电表运行的实际负荷曲线，帮助更贴切更准确地了解和掌握电能表的运行计量情况；本发明在真实负载情况下，通过外部载波抄控器对被检测电能表的电力载波通讯能力进行测试，更能真实的反应用户现场的环境。
The present invention relates to a real load test system for electric energy meters, which includes a host computer, which communicates bidirectionally with a central control board, and the central control board is respectively connected with a single-phase error tester for error testing of a single-phase electric energy meter to be tested. The device, the three-phase error testing device used for error testing the three-phase tested electric energy meter are in bidirectional communication, and the central control board supplies power to the single-phase error testing device and the three-phase error testing device. The present invention can adopt the real load of simulating on-site power consumption, and test the measurement error of the electric meter under the actual electric power consumption condition; the present invention can output the actual load curve of electric meter operation, and help to understand and grasp the operation measurement situation of electric energy meter more closely and accurately ; In the case of a real load, the present invention tests the power carrier communication capability of the detected electric energy meter through an external carrier copy controller, which can more truly reflect the user's on-site environment.
Description
技术领域technical field
本发明涉及电能测试技术领域，尤其是一种电能表的实负载测试系统。The invention relates to the technical field of electric energy testing, in particular to a real-load testing system for electric energy meters.
背景技术Background technique
目前，智能电能表得到了越来越广泛的应用，电能表作为一种较高精度的计量产品，其计量的准确性和稳定性是用户关注的重要方面。在电能表出厂之前，电表生产厂家需要对电能表进行计量和性能合格性检定，判断电能表否符合用户的要求，其计量精度和性能质量是否合格，是否具备出厂的条件。At present, smart energy meters have been used more and more widely. As a high-precision metering product, the metering accuracy and stability are important aspects that users pay attention to. Before the electric energy meter leaves the factory, the electric energy meter manufacturer needs to carry out the measurement and performance qualification verification of the electric energy meter to judge whether the electric energy meter meets the user's requirements, whether its measurement accuracy and performance quality are qualified, and whether it meets the conditions for leaving the factory.
在电能表正式投入使用之前，要经过电力计量部门的检验认可，同样需要检测其计量精度并验证功能的符合性。但是考虑到生产成本和检验成本，目前生产厂商和电力计量局所用的检定装置都是使用假负载对电能表的计量精度进行检定，即在检验台里面安装恒定输出的电压电流源，在对电能表检定时，对采样回路输出恒定的电流电压源，通过电能表内部计量单元的换算得出流过电表的计量值，然后与台体内部的标准表的计量值进行比较，得到被检定电能表的误差值，对比是否满足偏差要求，从而判定电能表是否合格。这种方法仅从理论上对电能表的精度进行判定，所加电流是理想的干净电流，并不是实际工作中的负荷电流。在假负载下的工作特性并不一定与真实负载下工作完全一致，计量误差会也会存在一定的偏差，更稳妥的方法是在真实负载下对电能表进行抽样检定。Before the energy meter is officially put into use, it needs to be inspected and approved by the power metering department. It is also necessary to test its measurement accuracy and verify the compliance of its functions. However, considering the production cost and inspection cost, the verification devices currently used by manufacturers and power metering bureaus use dummy loads to verify the measurement accuracy of electric energy meters, that is, a constant output voltage and current source is installed in the inspection table. When the meter is verified, a constant current and voltage source is output to the sampling circuit, and the metering value flowing through the meter is obtained through the conversion of the metering unit inside the meter, and then compared with the metering value of the standard meter inside the platform to obtain the meter to be verified The error value is compared with whether the deviation requirements are met, so as to determine whether the electric energy meter is qualified. This method only theoretically judges the accuracy of the electric energy meter, and the applied current is an ideal clean current, not the load current in actual work. The working characteristics under the false load may not be exactly the same as those under the real load, and there will be some deviations in the measurement error. The more secure method is to conduct sampling inspection on the electric energy meter under the real load.
发明内容Contents of the invention
本发明的目的在于提供一种在模拟用户现场实际用电的情况下，采用真实的负载，对电能表的采样电路计量功能进行检测，判断电能表计量功能是否正常的电能表的实负载测试系统。The purpose of the present invention is to provide a real load test system for the electric energy meter to detect the metering function of the sampling circuit of the electric energy meter and judge whether the metering function of the electric energy meter is normal under the situation of simulating the actual electricity consumption on the site of the user. .
为实现上述目的，本发明采用了以下技术方案：一种电能表的实负载测试系统，包括上位机，上位机与中心控制板双向通讯，所述中心控制板分别与用于对单相被检电能表进行误差测试的单相误差测试装置、用于对三相被检电能表进行误差测试的三相误差测试装置双向通讯，所述中心控制板分别向单相误差测试装置和三相误差测试装置供电。In order to achieve the above object, the present invention adopts the following technical solutions: a real load test system for electric energy meters, including a host computer, the host computer communicates with the central control board in two directions, and the central control board is respectively connected to the single-phase tested The single-phase error testing device for error testing of the electric energy meter and the three-phase error testing device for error testing of the three-phase tested electric energy meter have two-way communication. The device is powered.
所述中心控制板采用主控芯片，所述主控芯片为STC89C516主控芯片。The central control board adopts a main control chip, and the main control chip is an STC89C516 main control chip.
所述单相误差测试装置包括程控单相功率源、第一RLC负载箱、第一大功率调压源、第一标准电能表、第一误差计算器和多个第一误差显示器，所述中心控制板的第一通讯端口与程控单相功率源的通讯控制端连接，所述程控单相功率源通过第一大功率调压源分别为单相被检电能表、第一标准电能表提供连续的工作电压，所述中心控制板与第一RLC负载箱双向通讯，所述第一RLC负载箱输出真实电流信号分别至第一标准电能表和单相被检电能表，第一标准电能表和单相被检电能表的信号输出端均与第一误差计算器的输入端相连，第一误差计算器的输出端与第一误差显示器的输入端相连。The single-phase error testing device includes a program-controlled single-phase power source, a first RLC load box, a first high-power voltage regulating source, a first standard electric energy meter, a first error calculator and a plurality of first error displays, and the center The first communication port of the control board is connected to the communication control terminal of the program-controlled single-phase power source, and the program-controlled single-phase power source provides continuous working voltage, the central control board communicates bidirectionally with the first RLC load box, and the first RLC load box outputs real current signals to the first standard electric energy meter and the single-phase tested electric energy meter respectively, the first standard electric energy meter and the The signal output terminals of the single-phase tested electric energy meter are all connected with the input terminals of the first error calculator, and the output terminals of the first error calculator are connected with the input terminals of the first error display.
所述三相误差测试装置包括程控三相功率源、第二RLC负载箱、第二大功率调压源、三相电压互感器PT、三相电流互感器CT、监视仪表、三相现场校验仪、第二误差计算器和多个第二误差显示器，所述中心控制板的第二通讯端口与程控三相功率源的通讯控制端口相连，所述程控三相功率源通过第二大功率调压源为三相被检电能表提供连续的工作电压，所述中心控制板与第二RLC负载箱双向通讯，所述第二RLC负载箱输出真实电流信号分别至三相电流互感器CT和三相被检电能表，所述三相电流互感器CT的信号输出端分别与监视仪表、三相现场校验仪的电流输入端相连；所述第二大功率调压源的输出端与三相电压互感器PT的输入端相连，三相电压互感器PT的信号输出端分别与监视仪表、三相现场校验仪的电压输入端相连，所述三相现场校验仪、三相被检电能表的信号输出端均与第二误差计算器的输入端相连，第二误差计算器的输出端与第二误差显示器的输入端相连。The three-phase error testing device includes a program-controlled three-phase power source, a second RLC load box, a second high-power voltage regulating source, a three-phase voltage transformer PT, a three-phase current transformer CT, a monitoring instrument, and a three-phase on-site calibration instrument, a second error calculator and a plurality of second error displays, the second communication port of the central control board is connected to the communication control port of the program-controlled three-phase power source, and the program-controlled three-phase power source is adjusted by the second large power The voltage source provides continuous working voltage for the three-phase watt-hour meter to be tested. The central control board communicates bidirectionally with the second RLC load box, and the second RLC load box outputs real current signals to the three-phase current transformer CT and the three-phase current transformer respectively. Phase tested watt-hour meter, the signal output end of the three-phase current transformer CT is connected with the current input end of the monitoring instrument and the three-phase field calibrator respectively; the output end of the second high-power voltage regulating source is connected with the three-phase The input terminals of the voltage transformer PT are connected, and the signal output terminals of the three-phase voltage transformer PT are respectively connected with the voltage input terminals of the monitoring instrument and the three-phase field calibrator. The three-phase field calibrator and the three-phase tested electric energy The signal output terminals of the meter are all connected with the input terminals of the second error calculator, and the output terminals of the second error calculator are connected with the input terminals of the second error display.
所述第一误差计算器与中心控制板双向通讯。The first error calculator is in two-way communication with the central control board.
所述第二误差计算器与中心控制板双向通讯，所述三相现场校验仪内设置第二标准电能表。The second error calculator communicates bidirectionally with the central control board, and a second standard electric energy meter is installed in the three-phase on-site calibrator.
由上述技术方案可知，本发明的优点在于：第一，本发明能够采用模拟现场用电的真实负载，在实际用电情况下测试电表的计量误差；第二，本发明能够输出电表运行的实际负荷曲线，帮助更贴切更准确地了解和掌握电能表的运行计量情况；第三，本发明在真实负载情况下，通过外部载波抄控器对被检测电能表的电力载波通讯能力进行测试，更能真实的反应用户现场的环境。It can be seen from the above-mentioned technical scheme that the advantages of the present invention are: first, the present invention can adopt the real load of simulating on-site electricity consumption, and test the measurement error of the electric meter under the actual electric consumption situation; Second, the present invention can output the actual load of electric meter operation. The load curve helps to understand and grasp the operation and measurement of the electric energy meter more closely and accurately; third, the present invention tests the power carrier communication capability of the detected electric energy meter through an external carrier copy controller under real load conditions, and further It can truly reflect the user's on-site environment.
附图说明Description of drawings
图1为本发明的系统结构图；Fig. 1 is a system structure diagram of the present invention;
图2为本发明的总体操作流程图。Fig. 2 is a flow chart of the overall operation of the present invention.
具体实施方式detailed description
如图1所示，一种电能表的实负载测试系统，包括上位机，上位机与中心控制板双向通讯，所述中心控制板分别与用于对单相被检电能表进行误差测试的单相误差测试装置1、用于对三相被检电能表进行误差测试的三相误差测试装置2双向通讯，所述中心控制板分别向单相误差测试装置1和三相误差测试装置2供电。所述中心控制板采用主控芯片，所述主控芯片为STC89C516主控芯片。As shown in Figure 1, a real-load testing system for electric energy meters includes a host computer, which communicates with a central control board in two directions, and the central control board communicates with a single-phase single-phase electric energy meter for error testing. Phase error testing device 1, a three-phase error testing device 2 for performing error testing on a three-phase watt-hour meter to be tested in two-way communication, the central control board supplies power to the single-phase error testing device 1 and the three-phase error testing device 2 respectively. The central control board adopts a main control chip, and the main control chip is an STC89C516 main control chip.
如图1所示，所述单相误差测试装置1包括程控单相功率源、第一RLC负载箱、第一大功率调压源、第一标准电能表、第一误差计算器和多个第一误差显示器，所述中心控制板的第一通讯端口与程控单相功率源的通讯控制端连接，所述程控单相功率源通过第一大功率调压源分别为单相被检电能表、第一标准电能表提供连续的工作电压，所述中心控制板与第一RLC负载箱双向通讯，所述第一RLC负载箱输出真实电流信号分别至第一标准电能表和单相被检电能表，第一标准电能表和单相被检电能表的信号输出端均与第一误差计算器的输入端相连，第一误差计算器的输出端与第一误差显示器的输入端相连。所述第一误差计算器与中心控制板双向通讯。As shown in Figure 1, the single-phase error testing device 1 includes a programmable single-phase power source, a first RLC load box, a first high-power voltage regulating source, a first standard electric energy meter, a first error calculator and a plurality of first An error display, the first communication port of the central control board is connected to the communication control terminal of the program-controlled single-phase power source, and the program-controlled single-phase power source is respectively a single-phase tested electric energy meter, The first standard watt-hour meter provides continuous working voltage, the central control board communicates with the first RLC load box bidirectionally, and the first RLC load box outputs real current signals to the first standard watt-hour meter and the single-phase tested watt-hour meter respectively , the signal output ends of the first standard electric energy meter and the single-phase tested electric energy meter are connected with the input end of the first error calculator, and the output end of the first error calculator is connected with the input end of the first error display. The first error calculator is in two-way communication with the central control board.
如图1所示，所述三相误差测试装置2包括程控三相功率源、第二RLC负载箱、第二大功率调压源、三相电压互感器PT、三相电流互感器CT、监视仪表、三相现场校验仪、第二误差计算器和多个第二误差显示器，所述中心控制板的第二通讯端口与程控三相功率源的通讯控制端口相连，所述程控三相功率源通过第二大功率调压源为三相被检电能表提供连续的工作电压，所述中心控制板与第二RLC负载箱双向通讯，所述第二RLC负载箱输出真实电流信号分别至三相电流互感器CT和三相被检电能表，所述三相电流互感器CT的信号输出端分别与监视仪表、三相现场校验仪的电流输入端相连；所述第二大功率调压源的输出端与三相电压互感器PT的输入端相连，三相电压互感器PT的信号输出端分别与监视仪表、三相现场校验仪的电压输入端相连，所述三相现场校验仪、三相被检电能表的信号输出端均与第二误差计算器的输入端相连，第二误差计算器的输出端与第二误差显示器的输入端相连。所述第二误差计算器与中心控制板双向通讯，所述三相现场校验仪内设置第二标准电能表。As shown in Figure 1, the three-phase error testing device 2 includes a program-controlled three-phase power source, a second RLC load box, a second high-power voltage regulating source, a three-phase voltage transformer PT, a three-phase current transformer CT, a monitoring Meter, three-phase on-site calibrator, second error calculator and multiple second error displays, the second communication port of the central control panel is connected to the communication control port of the program-controlled three-phase power source, and the program-controlled three-phase power source The source provides continuous working voltage for the three-phase watt-hour meter to be tested through the second high-power voltage regulating source. The central control board communicates with the second RLC load box bidirectionally, and the second RLC load box outputs real current signals to the three phases respectively. A phase current transformer CT and a three-phase tested electric energy meter, the signal output terminals of the three-phase current transformer CT are respectively connected with the current input terminals of the monitoring instrument and the three-phase on-site calibrator; the second high-power voltage regulator The output end of the source is connected to the input end of the three-phase voltage transformer PT, and the signal output end of the three-phase voltage transformer PT is respectively connected to the voltage input end of the monitoring instrument and the three-phase field calibrator, and the three-phase field calibrator The signal output terminals of the meter and the three-phase tested electric energy meter are connected with the input terminal of the second error calculator, and the output terminal of the second error calculator is connected with the input terminal of the second error display. The second error calculator communicates bidirectionally with the central control board, and a second standard electric energy meter is set in the three-phase on-site calibrator.
如图2所示，第三项选择是指选择单相还是三相，基本功能测试和多功能测试具体如下：As shown in Figure 2, the third option is to choose single-phase or three-phase, the basic function test and multi-function test are as follows:
直流谐波测试是指直流偶次谐波试验：额定频率为基波频率偶数倍的谐波，被称为“偶次谐波”，如2、4、6、8次谐波，采用台体内对接入电能表的交流电流串接二极管，测试的电能表必须成对安装，测试时，参考电流选取14.1A，功率因数为1。The DC harmonic test refers to the DC even harmonic test: the harmonics whose rated frequency is an even multiple of the fundamental frequency are called "even harmonics", such as the 2nd, 4th, 6th, and 8th harmonics. For the AC current connected to the energy meter connected in series with diodes, the tested energy meters must be installed in pairs. During the test, the reference current is selected as 14.1A, and the power factor is 1.
电压跌落测试是指在正常电压测试过程中，通过操作大功率调压源快速升降，实现电压快速跌落试验。The voltage drop test refers to the rapid drop test of the voltage by operating the high-power voltage regulating source during the normal voltage test process.
功耗测试是指通过内部功耗测试模块，测试电压回路和电流回路功耗，分别在载波通讯和不通讯的情况下读取标准表的功率数据，得到电能表的功耗。The power consumption test refers to testing the power consumption of the voltage loop and the current loop through the internal power consumption test module, and reading the power data of the standard meter in the case of carrier communication and non-communication, respectively, to obtain the power consumption of the energy meter.
载波测试是指在台体通电测试过程中，通过外置电力载波抄控器对电能表进行载波抄读，测试在不同电压和负载下的抄读信息准确成功率。The carrier test refers to the carrier reading of the electric energy meter through the external power carrier reading controller during the power-on test of the platform, and tests the accuracy and success rate of the reading information under different voltages and loads.
市电隔离测试是指测试装置内部配备大功率隔离电源，测试过程为确保测试安全，启动隔离电源，实现市电隔离。The mains isolation test means that the test device is equipped with a high-power isolated power supply. In order to ensure the safety of the test, the test process starts the isolated power supply to achieve mains isolation.
实负载测试是指启动RLC负载箱对电能表进行功率带载，测试对即为实负载测试。The real load test refers to starting the RLC load box to carry out power load on the electric energy meter, and the test pair is the real load test.
以下结合图1、2对本发明作进一步的说明。The present invention will be further described below in conjunction with FIGS. 1 and 2 .
把被检电能表安装固定在检表台的接线架上，启动台体，被检电能表上电运行，启动RLC负载箱，被检电能表的计量运行通过后端的实际负载功率消耗带动。上位机经过串口服务器扩充出多路的串口通过RS485或RS232通信方式设置RLC负载箱的负载特性，从而调节负载的电流大小和相角特性。通过调整供电电源的电压，可以模拟实现电能表在实际运行过程中出现电压快速跌落和电压快速升高状况下的计量情况，判断是否存在电量计量不准确。Install and fix the electric energy meter under inspection on the wiring frame of the meter inspection station, start the platform body, power on the electric energy meter under inspection, start the RLC load box, and the metering operation of the electric energy meter under inspection is driven by the actual load power consumption at the back end. The upper computer expands multiple serial ports through the serial port server to set the load characteristics of the RLC load box through RS485 or RS232 communication, thereby adjusting the current size and phase angle characteristics of the load. By adjusting the voltage of the power supply, it is possible to simulate the measurement situation of the electric energy meter under the condition of rapid voltage drop and rapid voltage rise during the actual operation process, and judge whether there is inaccurate power measurement.
上位机通过串口通讯检测到电能表的计量值，经过被检电能表与标准电能表计量的电能值比对得到被检电表的相对误差，与用户设置的误差上限比对来判断电能表的误差是否合格。当检表参数（例如电流规格、阻容特性、感性等）确定后，上位机根据设定的校表参数依次调整负载的电流，进行误差检定，检定结果存储在数据库中。通过对负载和通断电的操作，上位机还具有测试电能表的负荷曲线的功能。The upper computer detects the measurement value of the electric energy meter through serial port communication, compares the electric energy value measured by the electric energy meter under inspection with the standard electric energy meter to obtain the relative error of the electric energy meter under inspection, and compares it with the error upper limit set by the user to judge the error of the electric energy meter whether it is passed. When the meter inspection parameters (such as current specifications, resistance-capacitance characteristics, inductance, etc.) Through the operation of load and power on and off, the host computer also has the function of testing the load curve of the electric energy meter.
程控单相功率源经过第一大功率调压源为单相被检电能表提供连续的工作电压，第一RLC负载箱为单相被检电能表和第一标准电能表提供真实的电流输出，每个单相被检电能表经过第一误差计算器计算再通过与第一标准电能表比对数据，最后通过第一误差显示器显示出来。The program-controlled single-phase power source provides continuous working voltage for the single-phase tested watt-hour meter through the first high-power voltage regulating source, and the first RLC load box provides real current output for the single-phase tested watt-hour meter and the first standard watt-hour meter. Each single-phase tested watt-hour meter is calculated by the first error calculator, then compared with the first standard watt-hour meter, and finally displayed on the first error display.
程控三相功率源经过第二大功率调压源为三相被检电能表提供三相连续工作电源，同时经过电压互感器PT计算并通过监视仪表显示出来实时显示实际电压值。上位机控制第二RLC负载箱为三相被检电能表提供实负载电流，并经过电流互感器CT转换，经过三相现场校验仪校验后，再通过第二误差计算器计算比对最终在第二误差显示器上显示出实际误差值。The program-controlled three-phase power source provides three-phase continuous working power for the three-phase tested electric energy meter through the second largest power voltage regulating source, and at the same time, it is calculated by the voltage transformer PT and displayed by the monitoring instrument to display the actual voltage value in real time. The upper computer controls the second RLC load box to provide the real load current for the three-phase electric energy meter under test, which is transformed by the current transformer CT, and after being calibrated by the three-phase on-site calibrator, the second error calculator is used to calculate and compare the final The actual error value is displayed on the second error display.
本装置采用的第一RLC负载箱和第二RLC负载箱是集阻性、感性、容性与一体的负载箱，真实模拟电能表在用户现场的用电消耗，电能计量按照现场的实际电量损耗真实计量，电源电压通过大功率电压源，真实模拟现场快速掉电上电的突发性事件，检测电量在现场突发事件下的电能计量情况。电压互感器PT和电流互感器CT作为程控三相功率源的附件跟程控三相功率源固定在一起；误差计算器是误差显示器的一个集成部件，安装在误差显示器内部，被检电能表是外部的被测对象，只有在测试时固定在装置的对应位置上；The first RLC load box and the second RLC load box used in this device are load boxes integrating resistance, inductance, and capacitiveness, which can truly simulate the electricity consumption of the electric energy meter at the user's site, and the electric energy is measured according to the actual electric consumption on the spot. Real metering, the power supply voltage passes through a high-power voltage source, truly simulates the sudden event of rapid power-off and power-on on-site, and detects the power metering situation of the electricity in the event of on-site emergency. The voltage transformer PT and the current transformer CT are fixed together with the program-controlled three-phase power source as accessories of the program-controlled three-phase power source; the error calculator is an integrated part of the error display, installed inside the error display, and the electric energy meter to be checked is external The object under test must be fixed at the corresponding position of the device during the test;
在测试时，其步骤如下：When testing, the steps are as follows:
一、选择启动按钮，给台体上电运行，根据所要测试产品型号，将被检电能表安装在台体上单相接线架或三相接线架对应表位，操作压接手柄，将被检电能表固定，调整好光电采集器位置，使其对准待测产品脉冲输出指示灯；光电采集器的作用采集脉冲输出的光电信号，再传输到误差计数器进行误差计算；1. Select the start button, power on the table body to run, install the electric energy meter to be tested on the table body on the single-phase wiring frame or the corresponding meter of the three-phase wiring frame according to the model of the product to be tested, operate the crimping handle, and the tested electric energy meter will be tested. The energy meter is fixed, and the position of the photoelectric collector is adjusted so that it is aligned with the pulse output indicator of the product to be tested; the function of the photoelectric collector is to collect the photoelectric signal output by the pulse, and then transmit it to the error counter for error calculation;
二、操作RLC负载箱的电源控制开关，打开操作显示屏，配置参数；打开上位机，根据被检电能表所在工位和测试项目，设定参数配置；2. Operate the power control switch of the RLC load box, open the operation display screen, and configure parameters; open the upper computer, and set the parameter configuration according to the station where the electric energy meter is located and the test items;
三、系统自动根据设置内容，自行对表架上的被检电能表进行精度误差测量和直流偶次谐波测试；3. The system automatically performs precision error measurement and DC even-order harmonic test on the tested electric energy meter on the meter stand according to the setting content;
四、通过控制台体电源输出，完成台体性能测试通讯测试；4. Through the power output of the console body, complete the communication test of the performance test of the console body;
五、测试结束后，按动测试结束按钮，关断电源开关。5. After the test is over, press the test end button and turn off the power switch.
本发明能够采用模拟现场用电的真实负载，在实际用电情况下测试电表的计量误差；本发明能够输出电表运行的实际负荷曲线，帮助更贴切更准确地了解和掌握电能表的运行计量情况；本发明在真实负载情况下，通过外部载波抄控器对被检测电能表的电力载波通讯能力进行测试，更能真实的反应用户现场的环境。The present invention can adopt the real load of simulating on-site power consumption, and test the measurement error of the electric meter under the actual electric power consumption condition; the present invention can output the actual load curve of electric meter operation, and help to understand and grasp the operation measurement situation of electric energy meter more closely and accurately ; In the case of a real load, the present invention tests the power carrier communication capability of the detected electric energy meter through an external carrier copy controller, which can more truly reflect the user's on-site environment.
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