技术领域technical field
本发明属于电力计量领域，尤其涉及一种三相电能表现场检测装置检测方法，该检测装置是一种全数字化、多功能、高精度、智能化的多参数工频测量仪器。应用最新微处理器技术和数字信号处理技术，以交流采样法实现工频电参数测量，校验电能表误差，自动判别电表接线状况；并对电能计量柜的综合误差、电流互感器变比、电压、电流质量进行测量。The invention belongs to the field of electric power metering, and in particular relates to a detection method for a field detection device of a three-phase electric energy meter. The detection device is an all-digital, multi-functional, high-precision and intelligent multi-parameter power frequency measuring instrument. Applying the latest microprocessor technology and digital signal processing technology, the AC sampling method is used to measure power frequency parameters, verify the error of the electric energy meter, and automatically judge the wiring status of the electric energy meter; Voltage and current quality are measured.
背景技术Background technique
目前，随着国网公司用电信息采集系统的快速建设，智能电能表的推广和应用也加快进度，每年都有大批的智能电能表安装到现场，电能表数量日益增多，电能表检测任务变得越来越繁重，传统电能表检测设备体积较大、操作复杂，不便于现场检测。在用户无负荷或负荷较低时，无法进行现场检测或检测精度较低。At present, with the rapid construction of the State Grid Corporation's electricity information collection system, the promotion and application of smart energy meters is also accelerating. A large number of smart energy meters are installed on the site every year. The number of energy meters is increasing day by day. It is getting more and more heavy. The traditional electric energy meter detection equipment is large in size and complex in operation, which is not convenient for on-site detection. When the user has no load or the load is low, on-site detection cannot be performed or the detection accuracy is low.
发明内容Contents of the invention
本发明的目的在于提供一种三相电能表现场检测装置，能够计算出电能表误差，在用户无负荷或负荷较小的状态下，由装置提供虚拟负荷在不停电拆线的情况下进行单/三相机械式或电子式电能表的现场检测，提高电能表现场检测精度和工作效率；既不影响用户正常用电，又完成了电能表的现场检测。The purpose of the present invention is to provide a three-phase electric energy meter on-site detection device, which can calculate the error of the electric energy meter. When the user has no load or the load is small, the device provides a virtual load to perform single-phase detection without power failure and disconnection. / On-site detection of three-phase mechanical or electronic energy meters, improving the accuracy and work efficiency of on-site detection of electric energy meters; it does not affect the normal power consumption of users, and completes the on-site detection of electric energy meters.
本发明涉及的一种三相电能表现场检测装置，包括由微型单片机(MCU)或嵌入式系统(ARM)组成的核心控制单元，与控制单元相连的数据存储单元、电源管理单元、交流采样单元、时钟发生单元、汉字显示单元、外围接口单元、键盘输入单元、过压保护电路和自复位电路，所述外围接口单元由电压输入接口、高精度电流钳表接口、脉冲信号采集接口、数据传输接口组成，且其输入输出接口接有光电隔离电路。The present invention relates to a three-phase electric energy meter field detection device, comprising a core control unit composed of a micro single-chip microcomputer (MCU) or an embedded system (ARM), a data storage unit connected to the control unit, a power management unit, and an AC sampling unit , a clock generation unit, a Chinese character display unit, a peripheral interface unit, a keyboard input unit, an overvoltage protection circuit and a self-resetting circuit, the peripheral interface unit is composed of a voltage input interface, a high-precision current clamp interface, a pulse signal acquisition interface, and a data transmission The interface is composed, and its input and output interfaces are connected with a photoelectric isolation circuit.
本发明涉及的三相电能表现场装置的检测方法，其步骤是：The detection method of the three-phase electric energy meter field device that the present invention relates to, its steps are:
1、正确接线后，开机进入电能表检测菜单；1. After the wiring is correct, turn on the power to enter the electric energy meter detection menu;
2、通过外接电压线和高精度电流钳表采样现场电压电流值，通过光电采集器或脉冲采集线与设备连接，采集电能表输出脉冲信号；2. Sampling the on-site voltage and current values through an external voltage line and a high-precision current clamp meter, and connecting to the device through a photoelectric collector or pulse acquisition line to collect the output pulse signal of the electric energy meter;
3、根据测得的现场电压、电流值计算实时功率，通过采集到的电能表脉冲输出个数计算电能表实时功率，两者功率进行实时比较，计算出电能表误差，通过三次误差值计算出平均误差值；3. Calculate the real-time power according to the measured on-site voltage and current values, calculate the real-time power of the electric energy meter through the collected pulse output of the electric energy meter, compare the two powers in real time, calculate the error of the electric energy meter, and calculate the error value through three times mean error value;
4、测量值通过显示单元进行实时显示；并可通过专用数据接口上传到计算机，自动生成检测报告存档，实现测试结果的浏览、查询、报表和打印功能；4. The measured value can be displayed in real time through the display unit; it can also be uploaded to the computer through the special data interface, and the test report can be automatically generated and archived to realize the browsing, query, report and printing functions of the test results;
5、所述核心控制单元提供虚拟负载，在用户无负荷和负荷较小的情况下，为计量表提供虚拟负荷，用以进行计量表检测。5. The core control unit provides a dummy load, and provides a dummy load for the meter to detect the meter when the user has no load or a small load.
进一步，通过键盘在不打开装置的情况下对装置测量精度进行调整，提高其测量精度和稳定度。Further, the measurement accuracy of the device can be adjusted without opening the device through the keyboard to improve the measurement accuracy and stability.
进一步，通过高精度电流钳表接口可测量低压计量装置综合误差和低压CT变比，以判别有无因更换电流互感器而影响电表计费。Furthermore, the comprehensive error of the low-voltage metering device and the transformation ratio of the low-voltage CT can be measured through the interface of the high-precision current clamp meter, so as to determine whether the billing of the electric meter is affected by the replacement of the current transformer.
本发明的有益效果是：所述三相电能表现场检测装置其内部参数和数据具有掉电自动保存功能；所述三相电能表现场检测装置能计算出电能表误差，可在不拆除现场计量表接线和无负荷的状态下进行单/三相机械式或电子式电能表现场检测。所述三相电能表现场检测装置配备电流钳，可测量低压计量装置综合误差和低压CT变比，以判别有无因更换电流互感器而影响电表计费。The beneficial effects of the present invention are: the internal parameters and data of the three-phase electric energy meter on-site detection device have the function of automatically saving after power failure; On-site detection of single/three-phase mechanical or electronic electric energy meters under the conditions of meter wiring and no load. The field detection device of the three-phase electric energy meter is equipped with a current clamp, which can measure the comprehensive error of the low-voltage metering device and the transformation ratio of the low-voltage CT, so as to determine whether the billing of the electric meter is affected by the replacement of the current transformer.
附图说明Description of drawings
图1是本发明的三相电能表现场检测装置的拓扑原理结构示意简图；Fig. 1 is a schematic diagram of the topology principle structure of the three-phase electric energy meter field detection device of the present invention;
图中:1、核心控制单元；2、汉字显示单元；3、键盘输入单元；4、交流采样单元；5、时钟发生单元；6、电源管理单元；7、数据存储单元；8、外围接口单元；81、电压输入接口；82、高精度电流钳表接口；83、脉冲信号采集接口；84、数据传输接口，9、过压保护电路9；10、复位电路；11、光电隔离电路11。In the figure: 1. Core control unit; 2. Chinese character display unit; 3. Keyboard input unit; 4. AC sampling unit; 5. Clock generation unit; 6. Power management unit; 7. Data storage unit; 8. Peripheral interface unit ; 81, voltage input interface; 82, high-precision current clamp meter interface; 83, pulse signal acquisition interface; 84, data transmission interface, 9, overvoltage protection circuit 9; 10, reset circuit; 11, photoelectric isolation circuit 11.
具体实施方式detailed description
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施实例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实例仅仅是用于解释本发明，并不用于限定本发明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific examples described here are only used to explain the present invention, not to limit the present invention.
本发明提供了一种三相电能表现场检测装置，如图1所示，该三相电能表现场检测装置由微型单片机(MCU)或嵌入式系统(ARM)组成其核心控制单元1，与控制单元相连接的数据存储单元7、电源管理单元6、交流采样单元4、时钟发生单元5、外围接口单元8、汉字显示单元2、键盘输入单元3、过压保护电路9和自复位电路10；其中外围接口单元8由电压输入接口81、高精度电流钳表接口82、脉冲信号采集接口83、数据传输接口84组成，且外围接口电路的输入输出接口均接有光电隔离电路11，控制单元1内部参数和数据具有掉电自动保存功能。所述交流采样单元由大规模高精度交流采样芯片(A/D)和外围接口电路组成，对电压、电流信号进行运算采集。The present invention provides a kind of three-phase electric energy meter field detection device, as shown in Figure 1, this three-phase electric energy meter field detection device is made up of its core control unit 1 by micro single-chip microcomputer (MCU) or embedded system (ARM), and control The data storage unit 7, the power management unit 6, the AC sampling unit 4, the clock generation unit 5, the peripheral interface unit 8, the Chinese character display unit 2, the keyboard input unit 3, the overvoltage protection circuit 9 and the self-reset circuit 10 connected to the unit; Wherein the peripheral interface unit 8 is composed of a voltage input interface 81, a high-precision current clamp interface 82, a pulse signal acquisition interface 83, and a data transmission interface 84, and the input and output interfaces of the peripheral interface circuit are all connected with a photoelectric isolation circuit 11, and the control unit 1 The internal parameters and data have the function of automatic saving when power off. The AC sampling unit is composed of a large-scale high-precision AC sampling chip (A/D) and a peripheral interface circuit, and performs calculation and collection of voltage and current signals.
采用该三相电能表现场检测装置的检测方法是：The detection method using the three-phase electric energy meter field detection device is:
1、正确接线后，开机进入电能表检测菜单；1. After the wiring is correct, turn on the power to enter the electric energy meter detection menu;
2、通过外接电压线和高精度电流钳表采样现场电压电流值，通过光电采集器或脉冲采集线与设备连接，采集电能表输出脉冲信号；2. Sampling the on-site voltage and current values through an external voltage line and a high-precision current clamp meter, and connecting to the device through a photoelectric collector or pulse acquisition line to collect the output pulse signal of the electric energy meter;
3、根据测得的现场电压、电流值计算实时功率，通过采集到的电能表脉冲输出个数计算电能表实时功率，两者功率进行实时比较，计算出电能表误差，通过三次误差值计算出平均误差值；3. Calculate the real-time power according to the measured on-site voltage and current values, calculate the real-time power of the electric energy meter through the collected pulse output of the electric energy meter, compare the two powers in real time, calculate the error of the electric energy meter, and calculate the error value through three times mean error value;
4、测量值通过显示单元进行实时显示；并可通过专用数据接口上传到计算机，自动生成检测报告存档，实现测试结果的浏览、查询、报表和打印功能；4. The measured value can be displayed in real time through the display unit; it can also be uploaded to the computer through the special data interface, and the test report can be automatically generated and archived to realize the browsing, query, report and printing functions of the test results;
5、所述核心控制单元提供虚拟负载，在用户无负荷和负荷较小的情况下，为计量表提供虚拟负荷，用以进行计量表检测。5. The core control unit provides a dummy load, and provides a dummy load for the meter to detect the meter when the user has no load or a small load.
通过键盘在不打开装置的情况下对装置测量精度进行调整，提高其测量精度和稳定度。The measurement accuracy of the device can be adjusted through the keyboard without opening the device to improve its measurement accuracy and stability.
通过高精度电流钳表接口可测量低压计量装置综合误差和低压CT变比，以判别有无因更换电流互感器而影响电表计费。Through the high-precision current clamp meter interface, the comprehensive error of the low-voltage metering device and the low-voltage CT transformation ratio can be measured to determine whether the billing of the electric meter is affected by the replacement of the current transformer.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.
| Application Number | Priority Date | Filing Date | Title |
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| CN201710481752.8ACN107121659A (en) | 2017-06-22 | 2017-06-22 | A kind of three-phase electric energy meter on-site detection means and detection method |
| Application Number | Priority Date | Filing Date | Title |
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| CN201710481752.8ACN107121659A (en) | 2017-06-22 | 2017-06-22 | A kind of three-phase electric energy meter on-site detection means and detection method |
| Publication Number | Publication Date |
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| CN107121659Atrue CN107121659A (en) | 2017-09-01 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710481752.8APendingCN107121659A (en) | 2017-06-22 | 2017-06-22 | A kind of three-phase electric energy meter on-site detection means and detection method |
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| CN (1) | CN107121659A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656234A (en)* | 2017-09-11 | 2018-02-02 | 国网山东省电力公司烟台供电公司 | A kind of phase three-wire three high-voltage electric-energy meter online test method and device |
| CN112748388A (en)* | 2019-10-29 | 2021-05-04 | 国网宁夏电力有限公司电力科学研究院 | Test system and test method for intelligent electric meter |
| RU2775865C1 (en)* | 2021-09-30 | 2022-07-11 | Общество с ограниченной ответственностью "МИРТЕК" | Method for monitoring the performance of an active electric energy meter |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900801A (en)* | 2010-07-15 | 2010-12-01 | 田卫华 | On-site detection device and detection method of intelligent electric energy meter |
| CN102128650A (en)* | 2010-01-20 | 2011-07-20 | 上海卓韦控制技术有限公司 | Digital continuous oil quantity detection system |
| CN104122483A (en)* | 2014-08-05 | 2014-10-29 | 国家电网公司 | Special current transformer transformation ratio detector for busbar |
| CN205643688U (en)* | 2016-06-01 | 2016-10-12 | 辽宁双宜电力电子有限公司 | Single -phase electric energy meter detection device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128650A (en)* | 2010-01-20 | 2011-07-20 | 上海卓韦控制技术有限公司 | Digital continuous oil quantity detection system |
| CN101900801A (en)* | 2010-07-15 | 2010-12-01 | 田卫华 | On-site detection device and detection method of intelligent electric energy meter |
| CN104122483A (en)* | 2014-08-05 | 2014-10-29 | 国家电网公司 | Special current transformer transformation ratio detector for busbar |
| CN205643688U (en)* | 2016-06-01 | 2016-10-12 | 辽宁双宜电力电子有限公司 | Single -phase electric energy meter detection device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656234A (en)* | 2017-09-11 | 2018-02-02 | 国网山东省电力公司烟台供电公司 | A kind of phase three-wire three high-voltage electric-energy meter online test method and device |
| CN112748388A (en)* | 2019-10-29 | 2021-05-04 | 国网宁夏电力有限公司电力科学研究院 | Test system and test method for intelligent electric meter |
| RU2775865C1 (en)* | 2021-09-30 | 2022-07-11 | Общество с ограниченной ответственностью "МИРТЕК" | Method for monitoring the performance of an active electric energy meter |
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