CN102087352A - Three-phase intelligent watt-hour meter inspection device and method - Google Patents
Three-phase intelligent watt-hour meter inspection device and methodDownload PDFInfo
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Abstract
Translated fromChineseDescription
Translated fromChinese技术领域technical field
本发明涉及一种电能表检验装置和方法。The invention relates to an electric energy meter inspection device and method.
背景技术Background technique
目前在智能电网中，智能电能表被赋予了很多新的功能，具有非常重要的作用。根据三相智能电能表的技术规范，需要对其有功电能计量误差、无功电能计量误差、时钟误差进行检验，并且要对其自身的功率消耗进行考核，而且还要对费控功能进行试验。At present, in the smart grid, the smart energy meter has been endowed with many new functions and plays a very important role. According to the technical specifications of the three-phase smart energy meter, it is necessary to test its active energy measurement error, reactive energy measurement error, and clock error, and to assess its own power consumption, and to test the cost control function.
普通的电能表检验装置，对于电能表的有功误差检验、无功误差检验、时钟准确度检验是串行进行的，检验时间长；对于电能表功耗的检验，需要使用额外的仪器，每次只能检验一只电能表，效率低下；对于智能电能表的费控跳闸试验无能为力。Ordinary watt-hour meter inspection devices are serially performed for the active energy error inspection, reactive power error inspection, and clock accuracy inspection of the electric energy meter, and the inspection time is long; for the inspection of the power consumption of the electric energy meter, additional instruments are required. Only one watt-hour meter can be tested, which is inefficient; there is nothing that can be done for the cost control trip test of the smart watt-hour meter.
发明内容Contents of the invention
本发明要解决的技术问题和提出的技术任务是对现有技术方案进行完善与改进，提供一种三相智能电能表检验装置和方法，以达到电能表检验快速，同时能检验功耗和费控跳闸的目的。为此，本发明采取以下技术方案：The technical problem to be solved and the technical task proposed by the present invention are to perfect and improve the existing technical solutions, and to provide a three-phase smart energy meter inspection device and method, so as to achieve fast inspection of the electric energy meter and at the same time to inspect power consumption and cost. The purpose of trip control. For this reason, the present invention takes the following technical solutions:
三相智能电能表检验装置，包括计算机，用于安装检验软件以控制检验设备并处理检测结果；标准时钟仪，用于发生恒定频率的时钟脉冲；三相程控源，为标准电能表和被检电能表提供三相电流和电压；标准电能表，为被检电能表的参照电能表；误差计算器，用于根据标准电能表及标准时钟仪计算被测电能表的误差；功耗测试仪，用于测试被检表的功耗；通讯模块，用于实现计算机和设备、被检电能表之间的通信连接，其特征在于：检验装置还包括能监测跳闸信号并自动短接测试工位电流回路的跳闸监测单元；检验装置设有复数个测试工位，每个测试工位设一功耗测试仪、一跳闸监测单元及一误差计算器；所述的误差计算器设有能对同时输入的三路高频脉冲、三路低频脉冲进行计数并同时计算的计数计算模块；所述的标准电能表设有能同时计量有功电能和无功电能并同时输出有功电能脉冲和无功电能脉冲的计量输出模块。标准电能表能同时输出有功电能脉冲和无功电能脉冲，且误差计算器能对输入的三组脉冲同时进行计数、误差计算，提高检测速度，解决传统电能表检验装置对于三相智能电能表的有功/无功电能计量误差和时钟误差等常规检验项目只能逐项检验、效率低下的问题。而且解决功耗测试难题，增加跳闸监测检验，完善检查项目，每一测试工位用于测试一台电能表，设多个测试工位能对多个电能表同时检查，节省检验时间。Three-phase intelligent electric energy meter inspection device, including computer, used to install inspection software to control inspection equipment and process inspection results; standard clock instrument, used to generate constant frequency clock pulse; three-phase program control source, for standard electric energy meter and tested The energy meter provides three-phase current and voltage; the standard energy meter is the reference energy meter of the tested energy meter; the error calculator is used to calculate the error of the tested energy meter according to the standard energy meter and the standard clock instrument; the power consumption tester, It is used to test the power consumption of the meter under inspection; the communication module is used to realize the communication connection between the computer and the equipment, and the electric energy meter under inspection. The trip monitoring unit of the circuit; the inspection device is provided with a plurality of test stations, and each test station is provided with a power consumption tester, a trip monitoring unit and an error calculator; the error calculator is provided with the ability to simultaneously input The three-way high-frequency pulse and three-way low-frequency pulse count and calculate the counting module at the same time; the standard electric energy meter is equipped with a device that can simultaneously measure active energy and reactive energy and simultaneously output active energy pulses and reactive energy pulses metered output module. The standard watt-hour meter can output active energy pulses and reactive energy pulses at the same time, and the error calculator can simultaneously count and calculate the errors of the three sets of input pulses, improve the detection speed, and solve the problem of the traditional watt-hour meter inspection device for the three-phase smart watt-hour meter. Routine inspection items such as active/reactive energy measurement errors and clock errors can only be inspected item by item, which is inefficient. And solve the problem of power consumption test, increase trip monitoring inspection, improve inspection items, each test station is used to test one electric energy meter, and setting multiple test stations can check multiple electric energy meters at the same time, saving inspection time.
作为对上述技术方案的进一步完善和补充，本发明还包括以下附加技术特征：As a further improvement and supplement to the above technical solution, the present invention also includes the following additional technical features:
所述的跳闸检测单元设用于检测电流开路的内置继电器跳闸检测功能模块、外置继电器跳闸检测功能模块和用于对电流开路进行短接的自动短接功能模块。在检测时，内置继电器跳闸检测功能模块的检测端与被检电能表的三相电流输入线并联连接，外置继电器跳闸检测功能模块的检测端与被检电能表的跳闸控制信号输出端连接。The trip detection unit is provided with a built-in relay trip detection function module for detecting current open circuit, an external relay trip detection function module and an automatic short circuit function module for short circuit current open circuit. During detection, the detection terminal of the built-in relay trip detection function module is connected in parallel with the three-phase current input line of the electric energy meter under inspection, and the detection end of the external relay trip detection function module is connected with the trip control signal output end of the electric energy meter under inspection.
所述的功耗测试单元设有用于检测被检电能表每相电压输入回路有功功率和无功功率的有功功率测试模块和无功功率测试模块、用于检测被检电能表每相电流输入回路的视在功率消耗的视在功率消耗测试模块及用于计算被检电能表电压回路总的有功功率和视在功率消耗、电流回路总的视在功率消耗的功耗测试计算模块。The power consumption test unit is provided with an active power test module and a reactive power test module for detecting the active power and reactive power of each phase voltage input circuit of the tested electric energy meter, and is used for detecting the current input circuit of each phase of the tested electric energy meter. The apparent power consumption test module of the apparent power consumption and the power consumption test calculation module for calculating the total active power and apparent power consumption of the voltage loop of the tested electric energy meter, and the total apparent power consumption of the current loop.
所述的通讯模块包括设备通信总线及电能表通信总线，计算机通过设备通信总线与三相程控源、标准电能表、误差计算器、功耗测试单元、跳闸检测单元相连使计算机通过设备通信总线对检测设备进行通信控制并将测试结果传递给计算机，计算机通过电能表通信总线与被检电能表相连。The communication module includes an equipment communication bus and an electric energy meter communication bus, and the computer is connected to a three-phase program control source, a standard electric energy meter, an error calculator, a power consumption test unit, and a trip detection unit through the equipment communication bus so that the computer can communicate with each other through the equipment communication bus. The detection equipment performs communication control and transmits the test results to the computer, and the computer is connected with the electric energy meter to be inspected through the electric energy meter communication bus.
三相程控源设有通讯接口与计算机通讯连接使计算机控制三相程控源输出设定的三相电压和三相电流的幅值、任意一相电压和电流之间的角度和三相电压之间的角度。The three-phase program-controlled source is equipped with a communication interface and is connected with a computer so that the computer controls the three-phase program-controlled source to output the set three-phase voltage and three-phase current amplitude, the angle between any one-phase voltage and current, and the three-phase voltage. Angle.
三相智能电能表检验方法，其特征在于它包括以下步骤：Three-phase intelligent electric energy meter inspection method is characterized in that it comprises the following steps:
1）检验装置及被检电能表连接步骤，三相程控源输出三相电压、三相电流接入标准电能表及多台被检电能表，电压串联，电流并联；被检电能表的有功电能脉冲输出、无功电能脉冲输出及时钟脉冲输出同时接到对应测试工位的误差计算器；误差计算器的标准有功脉冲输入端与标准电能表的有功脉冲输出端相连，标准无功脉冲输入端与标准电能表的无功脉冲输出端相连，标准时钟脉冲输入端与标准时钟的输出端相连；功耗测试仪与对应测试工位的被检电能表的电压、电流端相连，电压串联，电流并联；计算机通过设备通信总线连接到三相程控源、标准电能表、误差计算器、功耗测试单元的通讯端口；计算机通过电表通信总线连接到各被检电能表；1) Connection steps of the inspection device and the tested electric energy meter, the three-phase program-controlled source outputs three-phase voltage and three-phase current connected to the standard electric energy meter and multiple tested electric energy meters, the voltage is connected in series and the current is connected in parallel; the active energy of the tested electric energy meter The pulse output, reactive energy pulse output and clock pulse output are simultaneously connected to the error calculator of the corresponding test station; the standard active pulse input terminal of the error calculator is connected to the active pulse output terminal of the standard electric energy meter, and the standard reactive pulse input terminal It is connected to the reactive pulse output terminal of the standard electric energy meter, and the standard clock pulse input terminal is connected to the output terminal of the standard clock; Parallel connection; the computer is connected to the communication port of the three-phase program-controlled source, standard electric energy meter, error calculator, and power consumption test unit through the equipment communication bus; the computer is connected to each electric energy meter to be tested through the electric meter communication bus;
2）电能表误差测试步骤，计算机通过设备通信总线向程控源发出含三相电压、电流、相位值的指令，程控源输出特定的电压和电流，标准电能表对有功电能、无功电能同时计量并同时输出有功电能脉冲、无功电能脉冲，被检电能表输出有功电能脉冲、无功电能脉冲、时钟脉冲，标准时钟发出标准时钟脉冲信号；计算机通过设备通信总线向误差计算器发送含预置脉冲数的指令，误差计算器接收到指令后开始对同时输入的三路高频脉冲和三路低频脉冲同时计数并计算误差，计算结果包括有功电能误差值、无功电能误差值、时钟误差值；计算机检验软件通过设备通信总线从误差计算器读取误差结果数据；2) The error test step of the electric energy meter, the computer sends commands including three-phase voltage, current, and phase value to the program-controlled source through the equipment communication bus, and the program-controlled source outputs specific voltage and current, and the standard electric energy meter measures active energy and reactive energy at the same time At the same time, it outputs active energy pulses and reactive energy pulses. The tested energy meter outputs active energy pulses, reactive energy pulses, and clock pulses. The standard clock sends out standard clock pulse signals; The instruction of pulse number, after receiving the instruction, the error calculator starts to count and calculate the error of three high-frequency pulses and three low-frequency pulses input at the same time, and the calculation results include active energy error value, reactive energy error value, and clock error value ; The computer inspection software reads the error result data from the error calculator through the device communication bus;
3）电能表功耗测试步骤，计算机通过设备通信总线向功耗测试单元发出启动测试的指令；电能表功耗测试单元测试被检电能表每相电压输入回路的有功功率和视在功率消耗，被检电能表每相电流输入回路的视在功率消耗，计算被检电能表电压回路总的有功功率和视在功率消耗、电流回路总的视在功率消耗；计算机通过设备通信总线从功耗测试单元读取功耗测试值。3) The power consumption test step of the electric energy meter, the computer sends an instruction to start the test to the power consumption test unit through the equipment communication bus; the power consumption test unit of the electric energy meter tests the active power and apparent power consumption of each phase voltage input circuit of the electric energy meter under test, Calculate the apparent power consumption of each phase current input circuit of the tested electric energy meter, calculate the total active power and apparent power consumption of the voltage circuit of the tested electric energy meter, and the total apparent power consumption of the current circuit; The unit reads the power consumption test value.
电能表检验方法还包括电能表费控跳闸测试步骤，在电能表费控跳闸测试步骤前需将跳闸检测单元的内置继电器跳闸检测端与被检电能表的三相电流输入线并联连接，或将外置继电器跳闸检测端连接到被检电能表的跳闸控制信号输出端；在电能表费控跳闸测试时，计算机通过设备通信总线向跳闸检测单元发出指令；跳闸检测单元根据计算机的指令，切换到相应的检测通道，开始跳闸检测；若被检电能表是远程费控智能电能表，计算机通过电表通信总线对其发出跳闸指令，命令电能表跳闸；如果被检电能表是本地费控电能表，计算机控制程控源一直保持功率输出，直到被检电能表耗尽表内的预置电费，发生跳闸；当跳闸检测单元检测到内置继电器的跳闸，立刻短接相应测试工位的电流回路；计算机通过设备通信总线从跳闸检测单元读取跳闸检测结果；计算机通过电表通信总线向被检电能表发出充值指令，或者通过人工插卡充值，配合操作人员的操作使被检电能表发生合闸动作；计算机通过设备通信总线从跳闸检测单元读取合闸检测结果。The electric energy meter inspection method also includes the electric energy meter fee control trip test step. Before the electric energy meter charge control trip test step, it is necessary to connect the trip detection terminal of the built-in relay of the trip detection unit in parallel with the three-phase current input line of the electric energy meter under inspection, or connect the The trip detection terminal of the external relay is connected to the trip control signal output terminal of the electric energy meter under test; when the electric energy meter is charged for the trip test, the computer sends an instruction to the trip detection unit through the equipment communication bus; the trip detection unit switches to the The corresponding detection channel starts tripping detection; if the watt-hour meter to be checked is a remote fee-controlled smart watt-hour meter, the computer sends a trip command to it through the meter communication bus to order the watt-hour meter to trip; if the watt-hour meter to be checked is a local fee-controlled watt-hour meter, The computer controls the program-controlled source to maintain power output until the electric energy meter under test exhausts the preset electricity charges in the meter and trips; when the trip detection unit detects the trip of the built-in relay, it immediately short-circuits the current loop of the corresponding test station; the computer passes The device communication bus reads the trip detection result from the trip detection unit; the computer sends a recharge command to the watt-hour meter under test through the meter communication bus, or recharges through a manual card insertion, and cooperates with the operation of the operator to make the watt-hour meter under test close. Read the closing detection result from the trip detection unit through the device communication bus.
外置继电器跳闸检测时接入的跳闸控制信号为220V交流、脉冲或电平。The trip control signal connected to the external relay trip detection is 220V AC, pulse or level.
三相标准电能表同时输出的高频有功电能脉冲和无功电能脉冲频率不低于1000Hz；所述的标准时钟仪发生恒定频率的时钟脉冲频率不小于1MHz。The frequency of the high-frequency active energy pulse and reactive energy pulse output by the three-phase standard electric energy meter at the same time is not lower than 1000Hz; the frequency of the clock pulse with a constant frequency generated by the standard clock instrument is not less than 1MHz.
误差计算器对三组脉冲信号误差计算，其中两组脉冲计算出的误差值分辨率不低于0.0001%，另一组脉冲计算出的误差值分辨率不低于0.00005%。The error calculator calculates the error of the three groups of pulse signals, the resolution of the error value calculated by the two groups of pulses is not lower than 0.0001%, and the resolution of the error value calculated by the other group of pulses is not lower than 0.00005%.
本发明的有益效果是：可同时测量三相智能电能表的有功电能误差、无功电能误差和时钟误差，提高智能电能表的检验效率；可测量智能电能表的三相电压回路有功功率消耗和视在功率消耗，可测量三相电流回路视在功率消耗，解决功耗测试难题；可加载电流进行内置式继电器智能电能表跳闸试验，可进行外置式继电器智能电能表跳闸试验，外置式跳闸控制信号可以为脉冲、电平信号或交流220V，同时解决内置/外置继电器智能电能表跳闸试验问题，特别解决了外置继电器智能电能表不同类型跳闸控制信号的检测问题。The beneficial effects of the present invention are: the active energy error, the reactive energy error and the clock error of the three-phase intelligent electric energy meter can be measured simultaneously, and the inspection efficiency of the intelligent electric energy meter can be improved; the active power consumption and the three-phase voltage circuit active power consumption of the intelligent electric energy meter can be measured Apparent power consumption, can measure the apparent power consumption of three-phase current circuit, solve the problem of power consumption test; can load the current to conduct the trip test of the built-in relay smart energy meter, and can perform the trip test of the external relay smart energy meter, external trip control The signal can be pulse, level signal or AC 220V. At the same time, it solves the problem of tripping test of smart energy meter with built-in/external relay, especially solves the problem of detection of different types of trip control signals of smart energy meter with external relay.
附图说明Description of drawings
图1是本发明的原理框图。Fig. 1 is a functional block diagram of the present invention.
具体实施方式Detailed ways
以下结合说明书附图对本发明的技术方案做进一步的详细说明。The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.
本发明包括计算机，用于安装检验软件以控制检验设备并处理检测结果；标准时钟仪，用于发生恒定频率的时钟脉冲；三相程控源，为标准电能表和被检电能表提供三相电流和电压；标准电能表，为被检电能表的参照电能表；误差计算器，用于根据标准电能表及标准时钟仪计算被测电能表的误差；功耗测试仪，用于测试被检表的功耗；通讯模块，用于实现计算机和设备、被检电能表之间的通信连接；跳闸监测单元，用于监测跳闸信号并自动短接测试工位电流回路；检验装置设有复数个测试工位，每个测试工位设一功耗测试仪、一跳闸监测单元及一误差计算器；所述的误差计算器为能对同时输入的三路高频脉冲、三路低频脉冲进行计数并同时计算的误差计算器；所述的标准电能表为能同时计量有功电能和无功电能并同时输出有功电能脉冲和无功电能脉冲的标准电能表。跳闸检测单元设用于检测电流开路的内置继电器跳闸检测功能模块、外置继电器跳闸检测功能模块和用于对电流开路进行短接的自动短接功能模块。功耗测试单元设有用于检测被检电能表每相电压输入回路有功功率和无功功率的有功功率测试模块和无功功率测试模块、用于检测被检电能表每相电流输入回路的视在功率消耗的视在功率消耗测试模块及用于计算被检电能表电压回路总的有功功率和视在功率消耗、电流回路总的视在功率消耗的功耗测试计算模块。通讯模块包括设备通信总线及电能表通信总线，计算机通过设备通信总线与三相程控源、标准电能表、误差计算器、功耗测试单元、跳闸检测单元相连使计算机通过设备通信总线对检测设备进行通信控制并将测试结果传递给计算机，计算机通过电能表通信总线与被检电能表相连。三相程控源设有通讯接口与计算机通讯连接使计算机控制三相程控源输出设定的三相电压和三相电流的幅值、任意一相电压和电流之间的角度和三相电压之间的角度。The invention includes a computer for installing inspection software to control inspection equipment and process inspection results; a standard clock instrument for generating clock pulses with a constant frequency; a three-phase program control source for providing three-phase currents for the standard electric energy meter and the electric energy meter to be inspected and voltage; standard watt-hour meter, which is the reference watt-hour meter of the tested watt-hour meter; error calculator, used to calculate the error of the tested watt-hour meter according to the standard watt-hour meter and standard clock instrument; power consumption tester, used to test the tested meter power consumption; the communication module is used to realize the communication connection between the computer and the equipment, and the electric energy meter to be tested; the trip monitoring unit is used to monitor the trip signal and automatically short-circuit the current circuit of the test station; the inspection device is equipped with a plurality of test station, each test station is provided with a power consumption tester, a trip monitoring unit and an error calculator; the error calculator is capable of counting three-way high-frequency pulses and three-way low-frequency pulses input simultaneously and An error calculator for simultaneous calculation; the standard electric energy meter is a standard electric energy meter capable of simultaneously measuring active electric energy and reactive electric energy and simultaneously outputting active electric energy pulses and reactive electric energy pulses. The trip detection unit is provided with a built-in relay trip detection function module for detecting current open circuit, an external relay trip detection function module and an automatic short circuit function module for short circuit current open circuit. The power consumption test unit is equipped with an active power test module and a reactive power test module for detecting the active power and reactive power of each phase voltage input circuit of the electric energy meter under test, and for detecting the apparent power of each phase current input circuit of the electric energy meter under test. The apparent power consumption test module of power consumption and the power consumption test calculation module for calculating the total active power and apparent power consumption of the voltage circuit of the tested electric energy meter, and the total apparent power consumption of the current circuit. The communication module includes the equipment communication bus and the energy meter communication bus. The computer is connected with the three-phase program control source, the standard energy meter, the error calculator, the power consumption test unit, and the trip detection unit through the equipment communication bus so that the computer can monitor the detection equipment through the equipment communication bus. The communication controls and transmits the test results to the computer, and the computer is connected with the tested electric energy meter through the electric energy meter communication bus. The three-phase program-controlled source is equipped with a communication interface and is connected with a computer so that the computer controls the three-phase program-controlled source to output the set three-phase voltage and three-phase current amplitude, the angle between any one-phase voltage and current, and the three-phase voltage. Angle.
三相智能电能表检验方法包括以下步骤：Three-phase smart energy meter inspection method includes the following steps:
1）检测设备及被检电能表连接步骤，准备三相程控源1套，标准时钟1台，具有有功电能脉冲/无功电能脉冲同时输出功能的标准电能表1台，具有三路高频/三路低频同时输入计算功能的误差计算器Ｎ（Ｎ为测试工位数，可以是任意正整数，如16、24等）个，功耗测试单元Ｎ个，跳闸检测单元Ｎ个，RS485通信总线2组，安装检测软件的计算机一台。三相程控源输出三相电压、三相电流，接入标准电能表及多台被检电能表，电压串联，电流并联。被检电能表的有功电能脉冲输出、无功电能脉冲输出及时钟脉冲输出同时接到对应测试工位的误差计算器。误差计算器的标准有功脉冲输入端与标准表的有功脉冲输出端相连，标准无功脉冲输入端与标准表的无功脉冲输出端相连，标准时钟脉冲输入端与标准时钟的输出端相连。功耗测试仪与对应测试工位的被检电能表的电压、电流端相连，电压串联，电流并联。跳闸检测单元的内置继电器跳闸检测端与被检电能表的三相电流输入线并联连接，外置继电器跳闸检测端连接到被检电能表的跳闸控制信号输出端；控制计算机通过设备通信总线连接到三相程控源、标准电能表、误差计算器、功耗测试单元、跳闸检测单元的通讯端口；控制计算机通过电表通信总线连接到各被检电能表。1) The testing equipment and the connection steps of the watt-hour meter to be tested, prepare 1 set of three-phase program-controlled source, 1 set of standard clock, 1 set of standard watt-hour meter with simultaneous output function of active energy pulse/reactive energy pulse, with three-way high-frequency/ Three-way low-frequency simultaneous input calculation function error calculator N (N is the number of test stations, which can be any positive integer, such as 16, 24, etc.), N power consumption test units, N trip detection units, RS485 communication bus 2 groups, one computer with detection software installed. The three-phase program-controlled source outputs three-phase voltage and three-phase current, which are connected to standard electric energy meters and multiple tested electric energy meters, and the voltages are connected in series and the currents are connected in parallel. The active energy pulse output, reactive energy pulse output and clock pulse output of the electric energy meter under test are connected to the error calculator corresponding to the test station at the same time. The standard active pulse input terminal of the error calculator is connected with the active pulse output terminal of the standard meter, the standard reactive pulse input terminal is connected with the reactive pulse output terminal of the standard meter, and the standard clock pulse input terminal is connected with the output terminal of the standard clock. The power consumption tester is connected to the voltage and current terminals of the electric energy meter under test corresponding to the test station, the voltage is connected in series, and the current is connected in parallel. The built-in relay trip detection terminal of the trip detection unit is connected in parallel with the three-phase current input line of the watt-hour meter under test, and the trip detection terminal of the external relay is connected to the trip control signal output port of the watt-hour meter under test; the control computer is connected to the The communication port of the three-phase program-controlled source, the standard electric energy meter, the error calculator, the power consumption test unit, and the trip detection unit; the control computer is connected to each tested electric energy meter through the electric meter communication bus.
2）电能表误差测试步骤，计算机通过设备通信总线向程控源发出含三相电压、电流、相位值的指令，程控源输出特定的电压和电流，标准电能表对有功电能、无功电能同时计量并同时输出有功电能脉冲、无功电能脉冲，被检电能表输出有功电能脉冲、无功电能脉冲、时钟脉冲，标准时钟发出标准时钟脉冲信号；计算机通过设备通信总线向误差计算器发送含预置脉冲数的指令，误差计算器接收到指令后开始对同时输入的三路高频脉冲和三路低频脉冲同时计数并计算误差，计算结果包括有功电能误差值、无功电能误差值、时钟误差值；计算机检验软件通过设备通信总线从误差计算器读取误差结果数据。2) The error test step of the electric energy meter, the computer sends commands including three-phase voltage, current, and phase value to the program-controlled source through the equipment communication bus, and the program-controlled source outputs specific voltage and current, and the standard electric energy meter measures active energy and reactive energy at the same time At the same time, it outputs active energy pulses and reactive energy pulses. The tested energy meter outputs active energy pulses, reactive energy pulses, and clock pulses. The standard clock sends out standard clock pulse signals; The instruction of pulse number, after receiving the instruction, the error calculator starts to count and calculate the error of three high-frequency pulses and three low-frequency pulses input at the same time, and the calculation results include active energy error value, reactive energy error value, and clock error value ; The computer inspection software reads the error result data from the error calculator through the device communication bus.
3）电能表功耗测试步骤，计算机通过设备通信总线向功耗测试单元发出启动测试的指令；电能表功耗测试单元测试被检电能表每相电压输入回路的有功功率和视在功率消耗，被检电能表每相电流输入回路的视在功率消耗，计算被检电能表电压回路总的有功功率和视在功率消耗、电流回路总的视在功率消耗；计算机通过设备通信总线从功耗测试单元读取功耗测试值。3) The power consumption test step of the electric energy meter, the computer sends an instruction to start the test to the power consumption test unit through the equipment communication bus; the power consumption test unit of the electric energy meter tests the active power and apparent power consumption of each phase voltage input circuit of the electric energy meter under test, Calculate the apparent power consumption of each phase current input circuit of the tested electric energy meter, calculate the total active power and apparent power consumption of the voltage circuit of the tested electric energy meter, and the total apparent power consumption of the current circuit; The unit reads the power consumption test value.
4）电能表费控跳闸测试步骤，在电能表费控跳闸测试步骤前需将跳闸检测单元的内置继电器跳闸检测端与被检电能表的三相电流输入线并联连接，或将外置继电器跳闸检测端连接到被检电能表的跳闸控制信号输出端；在电能表费控跳闸测试时，计算机通过设备通信总线向跳闸检测单元发出指令；跳闸检测单元根据计算机的指令，切换到相应的检测通道，开始跳闸检测；若被检电能表是远程费控智能电能表，计算机通过电表通信总线对其发出跳闸指令，命令电能表跳闸；如果被检电能表是本地费控电能表，计算机控制程控源一直保持功率输出，直到被检电能表耗尽表内的预置电费，发生跳闸；当跳闸检测单元检测到内置继电器的跳闸，立刻短接相应测试工位的电流回路；计算机通过设备通信总线从跳闸检测单元读取跳闸检测结果；计算机通过电表通信总线向被检电能表发出充值指令，或者通过人工插卡充值，配合操作人员的操作使被检电能表发生合闸动作；计算机通过设备通信总线从跳闸检测单元读取合闸检测结果。4) Electric energy meter fee control trip test step, before the electric energy meter fee control trip test step, it is necessary to connect the trip detection terminal of the built-in relay of the trip detection unit in parallel with the three-phase current input line of the electric energy meter under test, or trip the external relay The detection terminal is connected to the output terminal of the trip control signal of the electric energy meter under test; when the electric energy meter is charged for the trip test, the computer sends an instruction to the trip detection unit through the equipment communication bus; the trip detection unit switches to the corresponding detection channel according to the instruction of the computer , start tripping detection; if the watt-hour meter to be checked is a remote fee-controlled smart watt-hour meter, the computer sends a trip command to it through the meter communication bus, ordering the watt-hour meter to trip; if the watt-hour meter to be checked is a local fee-controlled watt-hour meter, the computer controls the program-controlled source Keep the power output until the electric energy meter under test exhausts the preset electricity charge in the meter and trips; when the trip detection unit detects the trip of the built-in relay, it immediately short-circuits the current loop of the corresponding test station; the computer communicates from the device through the communication bus The trip detection unit reads the trip detection result; the computer sends a recharge command to the watt-hour meter under inspection through the meter communication bus, or recharges through a manual card insertion, and cooperates with the operation of the operator to make the watt-hour meter under inspection close. Read the closing detection result from the trip detection unit.
为了能更好的与各种电能表相配，外置继电器跳闸检测时接入的跳闸控制信号为220V交流、脉冲或电平。In order to better match with various energy meters, the trip control signal connected to the external relay trip detection is 220V AC, pulse or level.
为提高检测精度，三相标准电能表同时输出的高频有功电能脉冲和无功电能脉冲频率不低于1000Hz；标准时钟仪发生恒定频率的时钟脉冲频率不小于1MHz。误差计算器对三组脉冲信号误差计算，其中两组脉冲计算出的误差值分辨率不低于0.0001%，另一组脉冲计算出的误差值分辨率不低于0.00005%。In order to improve the detection accuracy, the frequency of the high-frequency active energy pulse and reactive energy pulse output by the three-phase standard electric energy meter at the same time is not less than 1000Hz; the frequency of the clock pulse with a constant frequency generated by the standard clock instrument is not less than 1MHz. The error calculator calculates the error of the three groups of pulse signals, the resolution of the error value calculated by the two groups of pulses is not lower than 0.0001%, and the resolution of the error value calculated by the other group of pulses is not lower than 0.00005%.
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