WO2012159400A1 - Online check meter of high-voltage electric energy metering device - Google Patents

Online check meter of high-voltage electric energy metering device Download PDF

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Publication number
WO2012159400A1
WO2012159400A1 PCT/CN2011/080217 CN2011080217W WO2012159400A1 WO 2012159400 A1 WO2012159400 A1 WO 2012159400A1 CN 2011080217 W CN2011080217 W CN 2011080217W WO 2012159400 A1 WO2012159400 A1 WO 2012159400A1
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Prior art keywords
electric energy
voltage
energy metering
metering device
microprocessor
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PCT/CN2011/080217
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French (fr)
Chinese (zh)
Inventor
冯凌
侯兴哲
胡晓锐
肖冀
魏麟
周华勇
张喜
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重庆市电力公司电力科学研究院
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Publication of WO2012159400A1 publication Critical patent/WO2012159400A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

Definitions

  • High-voltage electric energy metering device online calibrator This application claims to be submitted to the Chinese Patent Office, application number 201110138849.1 on May 25, 2011, and the priority of the Chinese patent application entitled “High-voltage electric energy metering device online calibrator", all of which The content is incorporated herein by reference.
  • TECHNICAL FIELD The present application relates to the field of power metering device calibration technology, and more particularly to a high voltage energy metering device online calibrator.
  • the electric energy metering device is used for collecting and recording the electric parameter data used by the user, thereby obtaining the electric energy parameter of the user for a period of time, and the accuracy of the electric energy metering device directly affects the interests of both the power supply and the power supply. Therefore, periodic on-site verification of the energy metering device is required to ensure the accuracy of the energy metering device.
  • the existing online calibrator for high-voltage electric energy metering devices generally adopts a sub-testing method, that is, respectively calibrates the electric energy meter error and the transformer error inside the high-voltage electric energy metering device, and measures the voltage drop of the secondary circuit of the transformer. After each sub-item error meets the corresponding error limit requirements, the whole set of electric energy metering devices is considered qualified. However, each sub-item error only reflects the metering performance of a single metering component and does not reflect the overall metering error of the entire energy metering device. Therefore, a comprehensive error assessment must be performed for each sub-metering error.
  • the so-called integrated error refers to the synthetic error of the current transformer and the voltage transformer, the voltage drop of the voltage transformer secondary loop voltage drop and the algebraic sum of the metering error of the energy meter. Since the actual grid voltage and power load are only approximately three-phase symmetry, and the actual operating error of the current transformer and voltage transformer and the voltage drop of the secondary circuit of the voltage transformer are not fixed values, the integrated error cannot be used as an evaluation of the error of the entire energy metering device. The basis for this is only applicable to the analysis of the source of the error. In other words, no matter the sub-item verification method and the comprehensive error evaluation, the overall error of the high-voltage energy metering device cannot be scientifically and reasonably evaluated. In particular, the error verification of the transformer must be performed in the power-off state, which greatly interferes with the normal power consumption of the user.
  • the embodiment of the present application provides an online calibrator for a high-voltage electric energy metering device, so as to accurately verify the overall error of the high-voltage electric energy metering device under the condition of no power failure, and the technical scheme is as follows:
  • An online calibrator for a high-voltage electric energy metering device comprising:
  • An acquisition processing unit disposed on the high voltage side for collecting electrical parameter information on the high voltage line, and converting the electrical parameter information into a digital signal;
  • An electric energy metering unit disposed on the low voltage side and connected to the collection processing unit receives the digital signal corresponding to the electrical parameter information, and calculates a power standard value of the current loop;
  • a microprocessor disposed on the low voltage side and connected to the electric energy metering unit, the microprocessor being connected with a power pulse input interface for measuring according to the measured high voltage electric energy metering device sent by the received energy pulse input interface
  • the electric energy pulse signal of the current loop and the electric energy standard value provided by the electric energy metering unit calculate the overall error of the measured high-voltage electric energy metering device;
  • a main control unit connected to the microprocessor is configured to control an operating state of the microprocessor.
  • the above-mentioned high-voltage electric energy metering device online calibrator further comprises: a display unit connected to the microprocessor for displaying the overall error of the measured high-voltage electric energy metering device calculated by the microprocessor.
  • the collection processing unit includes:
  • a sensor module for collecting voltage values and current values in a current loop
  • An analog/digital conversion module connected to the sample and hold module converts the collected voltage value and current value into digital signals respectively;
  • optical transmission module connected to the analog/digital conversion module, configured to convert the voltage and current digital signals into optical signals
  • a power module connected to the sample and hold module, the analog/digital conversion module, and the optical transmission module.
  • the main control unit includes: a control unit for controlling an operating state of the microprocessor, And a calibration unit for adjusting the self-measurement error of the online calibrator of the high-voltage energy metering device.
  • the sensor module comprises: a current sensor and a voltage sensor.
  • the electric energy metering unit is a digital signal processing DSP microprocessor.
  • the microprocessor and the main control unit form a single chip microcomputer.
  • the display unit is a liquid crystal display.
  • the collection processing unit can directly measure the electrical parameter information of the high-voltage side of the current line, for example, voltage information and current information, and convert the electrical parameter information into a digital signal for providing energy measurement.
  • the unit calculates the power standard value of the current loop and provides the power to the microprocessor, and the microprocessor calculates the measured high-voltage power according to the current circuit power standard value and the obtained current energy of the measured high-voltage energy metering device.
  • the overall error of the metering device, the main control unit is used for controlling the working state of the microprocessor.
  • the high-voltage energy metering device online calibrator realizes the accurate verification of the overall error of the high-voltage energy metering device under the condition of no power failure.
  • FIG. 1 is a schematic structural view of an on-line calibrator of a high-voltage electric energy metering device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of an acquisition processing unit according to an embodiment of the present application.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment of the present application provides an online calibrator for a high-voltage electric energy metering device, which measures the electric parameter information of the current line through the collection processing unit disposed on the high-voltage side, and then calculates the electric energy standard of the current loop by the electric energy measuring unit.
  • the value is compared with the current circuit energy measurement value measured by the measured high-voltage energy metering device to obtain the overall error of the measured high-voltage energy metering device, thereby realizing accurate verification of the energy metering under the condition of no power failure.
  • the overall error of the device is compared with the current circuit energy measurement value measured by the measured high-voltage energy metering device to obtain the overall error of the measured high-voltage energy metering device, thereby realizing accurate verification of the energy metering under the condition of no power failure.
  • the calibrator mainly includes: an acquisition processing unit 1, an electric energy measuring unit 2, a microprocessor 3, and a main control Unit 5, where:
  • the acquisition processing unit 1 is disposed on the high voltage side of the line for collecting electrical parameter information on the high voltage line where the measured high voltage electric energy metering device is located, and converting the electrical parameter information into a digital signal, and providing The energy metering unit 2 is supplied.
  • the collection processing unit can directly sample the electrical parameter information on the high voltage line where the measured high voltage electric energy metering device is located, that is, the electric parameter information of the current loop, and obtain a digital signal after analog-to-digital conversion, and obtain digital light after electro-optic conversion.
  • the signal, the electrical parameter information mainly includes voltage information and current information of the current loop.
  • the electric energy metering unit 2 is disposed on the low-voltage line where the high-voltage electric energy metering device is measured, and is connected to the collecting and processing unit 1 for receiving the digital optical signal of the electric parameter information conveyed by the processing unit 1, and calculating the current loop Standard value of electrical energy.
  • the energy metering unit can be implemented by a DSP (Digital Signal Processing) microprocessor, and firstly, the digital light signal of the received electrical parameter information of the current loop is restored to a digital electrical signal by photoelectric conversion, that is, the current The voltage information and current information of the loop are then calculated to obtain electrical parameter information of the current loop, such as the electrical power transmitted on the line.
  • DSP Digital Signal Processing
  • the microprocessor 3 is disposed on the low voltage line where the high voltage electric energy metering device under test is located, is connected to the electric energy metering unit 2, and is connected to the electric energy pulse input interface 4.
  • the main control unit 5 is connected to the microprocessor 3 for controlling the working state of the microprocessor 3.
  • the microprocessor 3 receives the electric energy standard value of the current loop delivered by the electric energy metering unit 2, and receives the electric energy pulse signal measured by the measured high-voltage electric energy metering device through the electric energy pulse signal input interface 4, and converts the electric energy pulse signal
  • the energy measurement value of the current loop that is, the energy value of the current loop measured by the measured high-voltage energy metering device. Then, based on the received power standard value of the current loop and the energy measurement value of the current loop, the microprocessor can calculate the overall error of the measured high piezoelectric energy metering device according to the following formula (1).
  • R is the measured electrical energy of the high-voltage energy metering device under test
  • E is the measured electrical energy of the line calibrator of the high-voltage energy metering device.
  • the microprocessor 3 and the main control unit 5 form a single-chip microcomputer, and the microprocessor 3 is preferably a single-chip microcomputer.
  • the main control unit 5 includes: a control unit 51 and a calibration unit 52, wherein: the control unit 51 For adjusting the working state of the microprocessor 3, the adjusting unit 52 is configured to adjust the measurement error of the online calibrator of the high-voltage energy metering device, and improve the high-voltage energy metering The verification accuracy of the device online calibrator.
  • the calibrator of the high-voltage electric energy metering device is equivalent to the standard electric energy metering device, directly measuring the electric parameter information on the high-voltage line where the measured high-voltage electric energy metering device is located, and calculating the electric energy standard value on the line, and The measured electric energy measurement values measured by the high-voltage electric energy metering device are compared, and the overall error of the measured high-voltage electric energy measuring device is obtained, so that the high-voltage electric energy measuring device can be accurately verified under the condition of no power failure.
  • the high-voltage electric energy metering device online calibrator further includes: a display unit 6 connected to the microprocessor on the low-voltage side of the line where the high-voltage electric energy metering device is tested, for displaying the microprocessor 3 Calculate the overall error of the measured high-voltage energy metering device.
  • the display unit 6 can display the calculated overall error of the measured high-voltage electric energy metering device in real time, and the display unit can be realized by a liquid crystal display.
  • the electric energy metering unit, the micro-processor and the display unit in the online calibrator of the high-voltage electric energy metering device provided in this embodiment are all disposed on the low-voltage side. Therefore, when the calibrator is used, the personal safety of the worker is not endangered.
  • 2 is a schematic structural diagram of an acquisition processing unit according to an embodiment of the present application.
  • the collection processing unit includes: a sensor module 11, a sample and hold module 12, an analog/digital conversion module 13, a light transmission module 14, and a power supply. Module 15, where:
  • the sensor module 11 is configured to sample voltage information and current information on the high voltage line where the high voltage energy metering device is measured, and ensure the synchronization of the sampling through the sample and hold module 12.
  • the sensor module includes a current sensor and a voltage sensor, respectively, for sampling electrical parameter information such as current amplitude and voltage amplitude at each moment on the high voltage line.
  • the current sensor can be implemented by a clamp ammeter, a micropower feedthrough current transformer or a hollow coil; the voltage sensor can be implemented by a capacitor, a resistor divider, or a magneto-optical effect optical sensor.
  • the sensor module can adopt a three-phase integral type or a single-phase split type structure, and adopts a material with sufficient dielectric strength to directly connect or socket directly on the high-voltage line where the high-voltage electric energy measuring device to be tested is located without power failure.
  • An analog/digital conversion module 13 is configured to convert the sampled electrical parameter information of the current loop into a digital Signal.
  • the optical transmission module 14 is connected to the analog/digital conversion module, and the digital signal for receiving the electrical parameter information of the current loop is converted into a digital optical signal and transmitted to the energy metering unit 2 through the optical fiber.
  • the optical transmission module can be implemented by an optical sensor.
  • the power module 15 provides power for the passive modules in the collection processing unit, which can be realized by current or voltage source.
  • the power module can specifically supply power to the sample and hold module 12, the analog/digital conversion module 13, and the optical transmission module 14.
  • the pulse constant of the online calibrator of the high-voltage electric energy metering device in the present specification can be set according to the pulse constant of the high-voltage electric energy measuring device to be tested, and the current and voltage transformer of the measured high-voltage electric energy metering device should be considered during the setting. Magnification. For example: When the pulse constant of the measured high-voltage energy metering device is 3200imp/kWh, the current transformer ratio is 50A/5A, that is, the magnification is 10, and the voltage transformer ratio is 10kV/100V, that is, the magnification is 100, due to the measured The high-voltage electric energy metering device measures the secondary electric energy, and the high-voltage electric energy measuring device measures the primary electric energy by the online calibrator.
  • the pulse constant set by the calibrator is the pulse constant of the measured high-voltage electric energy measuring device divided by the current and the voltage.
  • the transformer's multiplier ie 3.2imp/kWh, ensures that the current loop's electrical energy measured by the measured high-voltage energy metering device is correctly compared to the standard electrical energy measured by the calibrator.
  • the online calibrator of the high-voltage electric energy metering device provided by the embodiment of the present application can perform online verification on the 6kV-35 kV electric energy metering device operating in the field, and can display the real-time error of the verification through the display unit.

Abstract

Disclosed is an online check meter of a high-voltage electric energy metering device, comprising: an acquisition processing unit (1) arranged at a high-voltage side and used for acquiring electricity parameter information on a high-voltage line and converting the electricity parameter information into a digital signal; an electric energy metering unit (2) arranged at a low-voltage side, connected with the acquisition processing unit (1) and used for receiving the digital signal corresponding to the electricity parameter information and calculating the electric energy standard value of the current loop; and a microprocessor (3) arranged at the low-voltage side, connected with the electric energy metering unit (2) and connected with an electric energy pulse signal input interface (4). The microprocessor (3) receives the electric energy pulse signal, measured by the tested high-voltage electric energy metering device, of the current loop via the electric energy pulse signal input interface (4), and the electric energy standard value provided by the electric energy metering unit (2), and calculates the overall error of the tested high-voltage electric energy metering device, so that the overall error of the high-voltage electric energy metering device is checked accurately under the condition that the power supply is uninterrupted.

Description

高压电能计量装置在线校验仪 本申请要求于 2011年 05月 25日提交中国专利局、 申请号 201110138849.1 , 发明名称为 "高压电能计量装置在线校验仪"的中国专利申请的优先权， 其全 部内容通过引用结合在本申请中。 技术领域 本申请涉及电能计量装置校验技术领域，特别是涉及一种高压电能计量装 置在线校验仪。  High-voltage electric energy metering device online calibrator This application claims to be submitted to the Chinese Patent Office, application number 201110138849.1 on May 25, 2011, and the priority of the Chinese patent application entitled "High-voltage electric energy metering device online calibrator", all of which The content is incorporated herein by reference. TECHNICAL FIELD The present application relates to the field of power metering device calibration technology, and more particularly to a high voltage energy metering device online calibrator.
背景技术 Background technique
电能计量装置用于采集和记录用户使用电参量数据，从而得到用户在一段 时间内的用电参量， 电能计量装置的准确性， 直接影响到供电和用电双方的切 身利益。 因此， 需要对电能计量装置进行周期性现场校验， 保证电能计量装置 的准确性。  The electric energy metering device is used for collecting and recording the electric parameter data used by the user, thereby obtaining the electric energy parameter of the user for a period of time, and the accuracy of the electric energy metering device directly affects the interests of both the power supply and the power supply. Therefore, periodic on-site verification of the energy metering device is required to ensure the accuracy of the energy metering device.
目前， 现有的高压电能计量装置在线校验仪， 一般采用分项校验方法， 即 分别校验高压电能计量装置内部的电能表误差和互感器误差，以及测量互感器 二次回路电压降，各分项误差分别满足对应的误差限值要求后，认为整套电能 计量装置合格。 但是， 各分项误差仅反映单个计量元件的计量性能， 无法反映 整套电能计量装置的整体计量误差， 因而， 必须对各分项计量误差进行综合误 差评估。  At present, the existing online calibrator for high-voltage electric energy metering devices generally adopts a sub-testing method, that is, respectively calibrates the electric energy meter error and the transformer error inside the high-voltage electric energy metering device, and measures the voltage drop of the secondary circuit of the transformer. After each sub-item error meets the corresponding error limit requirements, the whole set of electric energy metering devices is considered qualified. However, each sub-item error only reflects the metering performance of a single metering component and does not reflect the overall metering error of the entire energy metering device. Therefore, a comprehensive error assessment must be performed for each sub-metering error.
所谓综合误差，是指电流互感器和电压互感器的合成误差、 电压互感器二 次回路电压降误差及电能表计量误差的代数和。由于实际电网电压和电力负荷 只是近似三相对称， 而且电流互感器、 电压互感器的实际运行误差及电压互感 器二次回路电压降不是固定值， 因此， 综合误差不能作为评估整套电能计量装 置误差的依据， 只适用于误差来源的分析。 换言之， 无论采用分项校验方法和 综合误差评估， 都无法科学合理地评定高压电能计量装置的整体误差。 尤其， 对互感器的误差校验工作， 必须在停电状态下进行，极大干扰了用户的正常用 电。  The so-called integrated error refers to the synthetic error of the current transformer and the voltage transformer, the voltage drop of the voltage transformer secondary loop voltage drop and the algebraic sum of the metering error of the energy meter. Since the actual grid voltage and power load are only approximately three-phase symmetry, and the actual operating error of the current transformer and voltage transformer and the voltage drop of the secondary circuit of the voltage transformer are not fixed values, the integrated error cannot be used as an evaluation of the error of the entire energy metering device. The basis for this is only applicable to the analysis of the source of the error. In other words, no matter the sub-item verification method and the comprehensive error evaluation, the overall error of the high-voltage energy metering device cannot be scientifically and reasonably evaluated. In particular, the error verification of the transformer must be performed in the power-off state, which greatly interferes with the normal power consumption of the user.
此外， 随着电能计量技术发展日新月异， 高压电能计量装置的集成度越来 越高， 已无法区分互感器与电能表， 不能使用分项校验方法对此种高压电能计 量装置进行校验。 In addition, with the rapid development of electric energy metering technology, the integration of high-voltage energy metering devices is coming The higher the difference, the inability to distinguish between the transformer and the energy meter, and the verification of this high-voltage energy metering device cannot be performed using the itemized verification method.
发明内容 Summary of the invention
为解决上述技术问题，本申请实施例提供一种高压电能计量装置在线校验 仪， 以实现在不停电的条件下， 准确校验高压电能计量装置的整体误差， 技术 方案如下：  In order to solve the above technical problem, the embodiment of the present application provides an online calibrator for a high-voltage electric energy metering device, so as to accurately verify the overall error of the high-voltage electric energy metering device under the condition of no power failure, and the technical scheme is as follows:
一种高压电能计量装置在线校验仪， 包括：  An online calibrator for a high-voltage electric energy metering device, comprising:
设置在高压侧的采集处理单元， 用于采集高压线路上的电参量信息， 并将 该电参量信息转换为数字信号；  An acquisition processing unit disposed on the high voltage side for collecting electrical parameter information on the high voltage line, and converting the electrical parameter information into a digital signal;
设置在低压侧且与所述采集处理单元相连的电能计量单元，接收所述电参 量信息对应的数字信号， 计算得到当前回路的电能标准值；  An electric energy metering unit disposed on the low voltage side and connected to the collection processing unit receives the digital signal corresponding to the electrical parameter information, and calculates a power standard value of the current loop;
设置在低压侧且与所述电能计量单元相连的微处理器，该微处理器连接有 电能脉沖输入接口，用于根据接收的所述电能脉沖输入接口发送的被测高压电 能计量装置测得的当前回路的电能脉沖信号，以及所述电能计量单元提供的电 能标准值， 计算得到被测高压电能计量装置的整体误差；  a microprocessor disposed on the low voltage side and connected to the electric energy metering unit, the microprocessor being connected with a power pulse input interface for measuring according to the measured high voltage electric energy metering device sent by the received energy pulse input interface The electric energy pulse signal of the current loop and the electric energy standard value provided by the electric energy metering unit calculate the overall error of the measured high-voltage electric energy metering device;
与所述微处理器相连的主控单元， 用于控制所述微处理器的工作状态。 优选的， 上述高压电能计量装置在线校验仪， 还包括： 与所述微处理器相 连的显示单元，用于显示所述微处理器计算得到的被测高压电能计量装置的整 体误差。  A main control unit connected to the microprocessor is configured to control an operating state of the microprocessor. Preferably, the above-mentioned high-voltage electric energy metering device online calibrator further comprises: a display unit connected to the microprocessor for displaying the overall error of the measured high-voltage electric energy metering device calculated by the microprocessor.
优选的， 所述采集处理单元包括：  Preferably, the collection processing unit includes:
用于采集当前回路中的电压值和电流值的传感器模块；  a sensor module for collecting voltage values and current values in a current loop;
与所述传感器模块相连的采样保持模块；  a sample and hold module connected to the sensor module;
与所述采样保持模块相连的模 /数转换模块， 将采集得到的电压值和电流 值分别转换成数字信号；  An analog/digital conversion module connected to the sample and hold module converts the collected voltage value and current value into digital signals respectively;
与所述模 /数转换模块相连的光传模块， 用于将所述电压、 电流数字信号 转换成光信号；  And an optical transmission module connected to the analog/digital conversion module, configured to convert the voltage and current digital signals into optical signals;
与所述采样保持模块、 所述模 /数转换模块及所述光传模块相连的电源模 块。  a power module connected to the sample and hold module, the analog/digital conversion module, and the optical transmission module.
优选的，所述主控单元包括：用于控制所述微处理器工作状态的控制单元， 以及用于调校该高压电能计量装置在线校验仪的自身测量误差的调校单元。 优选的， 所述传感器模块包括： 电流传感器和电压传感器。 Preferably, the main control unit includes: a control unit for controlling an operating state of the microprocessor, And a calibration unit for adjusting the self-measurement error of the online calibrator of the high-voltage energy metering device. Preferably, the sensor module comprises: a current sensor and a voltage sensor.
优选的， 所述电能计量单元为数字信号处理 DSP微处理器。  Preferably, the electric energy metering unit is a digital signal processing DSP microprocessor.
优选的， 所述微处理器及所述主控单元组成单片机。  Preferably, the microprocessor and the main control unit form a single chip microcomputer.
优选的， 所述显示单元为液晶显示器。  Preferably, the display unit is a liquid crystal display.
由以上本申请实施例提供的技术方案可见，采集处理单元可以直接测量当 前线路的高压侧的电参量信息， 比如， 电压信息和电流信息， 并将该电参量信 息转换为数字信号提供给电能计量单元，计算得到当前回路的电能标准值提供 给微处理器，微处理器根据当前回路的电能标准值， 以及获得的被测高压电能 计量装置测得的当前回路的电能， 计算得到被测高压电能计量装置的整体误 差， 主控单元， 用于控制所述微处理器的工作状态该高压电能计量装置在线校 验仪实现了在不停电的条件下， 准确校验高压电能计量装置的整体误差。  It can be seen from the technical solution provided by the above embodiments of the present application that the collection processing unit can directly measure the electrical parameter information of the high-voltage side of the current line, for example, voltage information and current information, and convert the electrical parameter information into a digital signal for providing energy measurement. The unit calculates the power standard value of the current loop and provides the power to the microprocessor, and the microprocessor calculates the measured high-voltage power according to the current circuit power standard value and the obtained current energy of the measured high-voltage energy metering device. The overall error of the metering device, the main control unit, is used for controlling the working state of the microprocessor. The high-voltage energy metering device online calibrator realizes the accurate verification of the overall error of the high-voltage energy metering device under the condition of no power failure.
附图说明 图 1为本申请实施例一种高压电能计量装置在线校验仪的结构示意图； 图 2为本申请实施例一种采集处理单元的结构示意图。 具体实施方式 本申请实施例提供一种高压电能计量装置在线校验仪，通过设置在高压侧 的采集处理单元， 测得当前线路的电参量信息， 进而由电能计量单元计算得到 当前回路的电能标准值，再将电能标准值与被测高压电能计量装置测得的当前 回路的电能测量值进行比较，得到被测高压电能计量装置的整体误差， 实现了 在不停电的条件下准确校验电能计量装置的整体误差。 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of an on-line calibrator of a high-voltage electric energy metering device according to an embodiment of the present invention; FIG. 2 is a schematic structural view of an acquisition processing unit according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment of the present application provides an online calibrator for a high-voltage electric energy metering device, which measures the electric parameter information of the current line through the collection processing unit disposed on the high-voltage side, and then calculates the electric energy standard of the current loop by the electric energy measuring unit. The value is compared with the current circuit energy measurement value measured by the measured high-voltage energy metering device to obtain the overall error of the measured high-voltage energy metering device, thereby realizing accurate verification of the energy metering under the condition of no power failure. The overall error of the device.
为使本申请的上述目的、特征和优点能够更加明显易懂， 下面结合附图和 具体实施方式对本申请作进一步详细的说明。  The above objects, features and advantages of the present application will become more apparent and understood.
请参见图 1 , 示出了本申请实施例一种高压电能计量装置在线校验仪的结 构示意图， 该校验仪主要包括： 采集处理单元 1、 电能计量单元 2、 微处理器 3 , 主控单元 5 , 其中：  Referring to FIG. 1 , a schematic structural diagram of an on-line calibrator for a high-voltage electric energy metering device according to an embodiment of the present application is shown. The calibrator mainly includes: an acquisition processing unit 1, an electric energy measuring unit 2, a microprocessor 3, and a main control Unit 5, where:
采集处理单元 1 , 设置在线路的高压侧， 用于采集被测高压电能计量装置 所在的高压线路上的电参量信息， 并将该电参量信息转换为数字信号， 并提供 给电能计量单元 2。 The acquisition processing unit 1 is disposed on the high voltage side of the line for collecting electrical parameter information on the high voltage line where the measured high voltage electric energy metering device is located, and converting the electrical parameter information into a digital signal, and providing The energy metering unit 2 is supplied.
所述采集处理单元可以通过传感器直接采样被测高压电能计量装置所在 的高压线路上的电参量信息， 即当前回路的电参量信息， 并经过模数转换后得 到数字信号， 经过电光转换后得到数字光信号， 所述电参量信息主要包括当前 回路的电压信息和电流信息。  The collection processing unit can directly sample the electrical parameter information on the high voltage line where the measured high voltage electric energy metering device is located, that is, the electric parameter information of the current loop, and obtain a digital signal after analog-to-digital conversion, and obtain digital light after electro-optic conversion. The signal, the electrical parameter information mainly includes voltage information and current information of the current loop.
电能计量单元 2, 设置在被测高压电能计量装置所在的低压线路上， 且与 采集处理单元 1相连，用于接收采集处理单元 1所输送的电参量信息的数字光信 号， 计算得到当前回路的电能标准值。  The electric energy metering unit 2 is disposed on the low-voltage line where the high-voltage electric energy metering device is measured, and is connected to the collecting and processing unit 1 for receiving the digital optical signal of the electric parameter information conveyed by the processing unit 1, and calculating the current loop Standard value of electrical energy.
具体的， 该电能计量单元可以通过 DSP ( Digital Signal Processing, 数字信 号处理）微处理器实现， 首先通过光电转换将接收到的当前回路的电参量信息 的数字光信号还原为数字电信号， 即当前回路的电压信息和电流信息， 然后计 算得到当前回路的电参数信息， 比如该线路上传输的电功率。  Specifically, the energy metering unit can be implemented by a DSP (Digital Signal Processing) microprocessor, and firstly, the digital light signal of the received electrical parameter information of the current loop is restored to a digital electrical signal by photoelectric conversion, that is, the current The voltage information and current information of the loop are then calculated to obtain electrical parameter information of the current loop, such as the electrical power transmitted on the line.
微处理器 3 , 设置在被测高压电能计量装置所在的低压线路上， 与所述电 能计量单元 2相连， 并与电能脉沖输入接口 4相连。  The microprocessor 3 is disposed on the low voltage line where the high voltage electric energy metering device under test is located, is connected to the electric energy metering unit 2, and is connected to the electric energy pulse input interface 4.
主控单元 5 , 与所述微处理器 3相连， 用于控制所述微处理器 3的工作状态。 微处理器 3接收电能计量单元 2输送的当前回路的电能标准值， 同时，通过 该电能脉沖信号输入接口 4接收被测高压电能计量装置测得的电能脉沖信号， 并将所述电能脉沖信号换算成当前回路的电能测量值，即被测高压电能计量装 置测得的当前回路的电能值。 然后，微处理器根据接收到当前回路的电能标准 值， 以及当前回路的电能测量值， 可以根据下面的公式（1 )计算得到被测高 压电能计量装置的整体误差，  The main control unit 5 is connected to the microprocessor 3 for controlling the working state of the microprocessor 3. The microprocessor 3 receives the electric energy standard value of the current loop delivered by the electric energy metering unit 2, and receives the electric energy pulse signal measured by the measured high-voltage electric energy metering device through the electric energy pulse signal input interface 4, and converts the electric energy pulse signal The energy measurement value of the current loop, that is, the energy value of the current loop measured by the measured high-voltage energy metering device. Then, based on the received power standard value of the current loop and the energy measurement value of the current loop, the microprocessor can calculate the overall error of the measured high piezoelectric energy metering device according to the following formula (1).
r =(R-E ) /Exl00% ( 1 )  r =(R-E ) /Exl00% ( 1 )
式中， r为被测高压电能计量装置的整体误差， R为被测高压电能计量装置 测得的电能量， E为该高压电能计量装置在线校验仪测得的电能量。  Where r is the overall error of the high-voltage energy metering device under test, R is the measured electrical energy of the high-voltage energy metering device under test, and E is the measured electrical energy of the line calibrator of the high-voltage energy metering device.
具体实施时， 微处理器 3和主控单元 5组成了单片机， 微处理器 3为单片机 优选的， 所述主控单元 5包括： 控制单元 51和调校单元 52, 其中： 所述控制单元 51用于控制所述微处理器 3的工作状态， 所述调校单元 52用 于调校该高压电能计量装置在线校验仪自身的测量误差，提高该高压电能计量 装置在线校验仪的校验准确性。 In a specific implementation, the microprocessor 3 and the main control unit 5 form a single-chip microcomputer, and the microprocessor 3 is preferably a single-chip microcomputer. The main control unit 5 includes: a control unit 51 and a calibration unit 52, wherein: the control unit 51 For adjusting the working state of the microprocessor 3, the adjusting unit 52 is configured to adjust the measurement error of the online calibrator of the high-voltage energy metering device, and improve the high-voltage energy metering The verification accuracy of the device online calibrator.
本实施例提供的高压电能计量装置校验仪，相当于标准电能计量装置， 直 接测量被测高压电能计量装置所在的高压线路上的电参量信息，并计算得到该 线路上的电能标准值， 与被测高压电能计量装置测得的电能测量值进行比较， 得到被测高压电能计量装置的整体误差， 实现在不停电的条件下， 准确校验高 压电能计量装置。 优选地， 参见图 1 , 所述高压电能计量装置在线校验仪还包括： 设置在被 测高压电能计量装置所在线路的低压侧与微处理器相连的显示单元 6, 用于显 示微处理器 3计算得到的被测高压电能计量装置的整体误差。  The calibrator of the high-voltage electric energy metering device provided by the embodiment is equivalent to the standard electric energy metering device, directly measuring the electric parameter information on the high-voltage line where the measured high-voltage electric energy metering device is located, and calculating the electric energy standard value on the line, and The measured electric energy measurement values measured by the high-voltage electric energy metering device are compared, and the overall error of the measured high-voltage electric energy measuring device is obtained, so that the high-voltage electric energy measuring device can be accurately verified under the condition of no power failure. Preferably, referring to FIG. 1, the high-voltage electric energy metering device online calibrator further includes: a display unit 6 connected to the microprocessor on the low-voltage side of the line where the high-voltage electric energy metering device is tested, for displaying the microprocessor 3 Calculate the overall error of the measured high-voltage energy metering device.
具体的， 显示单元 6可以实时显示计算得到的被测高压电能计量装置的整 体误差， 且该显示单元可以通过液晶显示屏实现。  Specifically, the display unit 6 can display the calculated overall error of the measured high-voltage electric energy metering device in real time, and the display unit can be realized by a liquid crystal display.
本实施例提供的高压电能计量装置在线校验仪中的电能计量单元、微处理 器和显示单元均设置在低压侧， 因此， 使用该校验仪时， 不会危及工作人员的 人身安全。 请参见图 2, 示出了本申请实施例一种采集处理单元的结构示意图， 所述 采集处理单元包括： 传感器模块 11、 采样保持模块 12、 模 /数转换模块 13、 光 传模块 14、 电源模块 15, 其中：  The electric energy metering unit, the micro-processor and the display unit in the online calibrator of the high-voltage electric energy metering device provided in this embodiment are all disposed on the low-voltage side. Therefore, when the calibrator is used, the personal safety of the worker is not endangered. 2 is a schematic structural diagram of an acquisition processing unit according to an embodiment of the present application. The collection processing unit includes: a sensor module 11, a sample and hold module 12, an analog/digital conversion module 13, a light transmission module 14, and a power supply. Module 15, where:
传感器模块 11 ,用于采样被测高压电能计量装置的所在的高压线路上的电 压信息和电流信息， 并通过采样保持模块 12保证采样的同步性。  The sensor module 11 is configured to sample voltage information and current information on the high voltage line where the high voltage energy metering device is measured, and ensure the synchronization of the sampling through the sample and hold module 12.
具体的， 该传感器模块包括电流传感器和电压传感器， 分别用于采样所述 高压线路上各时刻的电流幅值和电压幅值等电参量信息。  Specifically, the sensor module includes a current sensor and a voltage sensor, respectively, for sampling electrical parameter information such as current amplitude and voltage amplitude at each moment on the high voltage line.
电流传感器可以通过钳形电流表、 微功率穿心电流互感器或空心线圏实 现； 电压传感器可以通过电容、 电阻分压器、 或者磁光效应光学传感器实现。  The current sensor can be implemented by a clamp ammeter, a micropower feedthrough current transformer or a hollow coil; the voltage sensor can be implemented by a capacitor, a resistor divider, or a magneto-optical effect optical sensor.
该传感器模块可以采用三相整体式或者单相分体式的结构，采用具有足够 绝缘强度的材料，在不停电的状态下， 直接串接或套接在被测高压电能计量装 置所在的高压线路上。  The sensor module can adopt a three-phase integral type or a single-phase split type structure, and adopts a material with sufficient dielectric strength to directly connect or socket directly on the high-voltage line where the high-voltage electric energy measuring device to be tested is located without power failure.
模 /数转换模块 13, 用于将采样得到的当前回路的电参量信息转换为数字 信号。 An analog/digital conversion module 13 is configured to convert the sampled electrical parameter information of the current loop into a digital Signal.
光传模块 14, 与所述模 /数转换模块相连， 用于接收所述当前回路的电参 量信息的数字信号转换为数字光信号通过光纤输送给电能计量单元 2。  The optical transmission module 14 is connected to the analog/digital conversion module, and the digital signal for receiving the electrical parameter information of the current loop is converted into a digital optical signal and transmitted to the energy metering unit 2 through the optical fiber.
具体实施时， 该光传模块可以通过光学传感器实现。  In a specific implementation, the optical transmission module can be implemented by an optical sensor.
电源模块 15, 为该采集处理单元内的无源模块提供工作所需的电源， 具体 可以通过电流或电压取源的方式实现。 该电源模块具体可以为采样保持模块 12、 模 /数转换模块 13和光传模块 14提供电能。  The power module 15 provides power for the passive modules in the collection processing unit, which can be realized by current or voltage source. The power module can specifically supply power to the sample and hold module 12, the analog/digital conversion module 13, and the optical transmission module 14.
需要说明的是，本说明书中的高压电能计量装置在线校验仪的脉沖常数可 根据被测高压电能计量装置的脉沖常数进行设置，设置时应考虑被测高压电能 计量装置电流、 电压互感器的倍率。 比如： 当被测高压电能计量装置的脉沖常 数为 3200imp/kWh, 电流互感器变比为 50A/5A, 即倍率为 10, 电压互感器变比 为 10kV/100V, 即倍率为 100, 由于被测高压电能计量装置计量的是二次电能， 高压电能计量装置在线校验仪计量的是一次电能，该校验仪所设置的脉沖常数 应是被测高压电能计量装置的脉沖常数除以电流、 电压互感器的倍率， 即 3.2imp/kWh,保证被测高压电能计量装置测量的当前回路的电能与该校验仪测 量的标准电能正确比较。  It should be noted that the pulse constant of the online calibrator of the high-voltage electric energy metering device in the present specification can be set according to the pulse constant of the high-voltage electric energy measuring device to be tested, and the current and voltage transformer of the measured high-voltage electric energy metering device should be considered during the setting. Magnification. For example: When the pulse constant of the measured high-voltage energy metering device is 3200imp/kWh, the current transformer ratio is 50A/5A, that is, the magnification is 10, and the voltage transformer ratio is 10kV/100V, that is, the magnification is 100, due to the measured The high-voltage electric energy metering device measures the secondary electric energy, and the high-voltage electric energy measuring device measures the primary electric energy by the online calibrator. The pulse constant set by the calibrator is the pulse constant of the measured high-voltage electric energy measuring device divided by the current and the voltage. The transformer's multiplier, ie 3.2imp/kWh, ensures that the current loop's electrical energy measured by the measured high-voltage energy metering device is correctly compared to the standard electrical energy measured by the calibrator.
本申请实施例提供的高压电能计量装置在线校验仪可以对在现场运行的 6kV-35 kV的电能计量装置进行在线校验， 而且可以将校验的实时误差通过显 示单元显示。  The online calibrator of the high-voltage electric energy metering device provided by the embodiment of the present application can perform online verification on the 6kV-35 kV electric energy metering device operating in the field, and can display the real-time error of the verification through the display unit.
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相 似的部分互相参见即可， 每个实施例重点说明的都是与其他实施例的不同之 处。 以上所描述的实施例仅仅是示意性的， 其中所述作为分离部件说明的单元 可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以 不是物理单元， 即可以位于一个地方， 或者也可以分布到多个网络单元上。 可 以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。 本领域普通技术人员在不付出创造性劳动的情况下， 即可以理解并实施。  The various embodiments in the present specification are described in a progressive manner, and the same parts of the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. The embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, ie may be located in one Places, or they can be distributed to multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通 技术人员来说， 在不脱离本申请原理的前提下， 还可以做出若干改进和润饰， 这些改进和润饰也应视为本申请的保护范围。  The above description is only a specific embodiment of the present application, and it should be noted that those skilled in the art can also make some improvements and retouching without departing from the principle of the present application. It should be considered as the scope of protection of this application.

Claims

权 利 要 求 Rights request
1、 一种高压电能计量装置在线校验仪， 其特征在于， 包括：  1. An online calibrator for a high-voltage electric energy metering device, comprising:
设置在高压侧的采集处理单元， 用于采集高压线路上的电参量信息， 并将 该电参量信息转换为数字信号；  An acquisition processing unit disposed on the high voltage side for collecting electrical parameter information on the high voltage line, and converting the electrical parameter information into a digital signal;
设置在低压侧且与所述采集处理单元相连的电能计量单元，接收所述电参 量信息对应的数字信号， 计算得到当前回路的电能标准值；  An electric energy metering unit disposed on the low voltage side and connected to the collection processing unit receives the digital signal corresponding to the electrical parameter information, and calculates a power standard value of the current loop;
设置在低压侧且与所述电能计量单元相连的微处理器，该微处理器连接有 电能脉沖输入接口，用于根据接收的所述电能脉沖输入接口发送的被测高压电 能计量装置测得的当前回路的电能脉沖信号，以及所述电能计量单元提供的电 能标准值， 计算得到被测高压电能计量装置的整体误差；  a microprocessor disposed on the low voltage side and connected to the electric energy metering unit, the microprocessor being connected with a power pulse input interface for measuring according to the measured high voltage electric energy metering device sent by the received energy pulse input interface The electric energy pulse signal of the current loop and the electric energy standard value provided by the electric energy metering unit calculate the overall error of the measured high-voltage electric energy metering device;
与所述微处理器相连的主控单元， 用于控制所述微处理器的工作状态。 A main control unit connected to the microprocessor is configured to control an operating state of the microprocessor.
2、根据权利要求 1所述的高压电能计量装置在线校验仪， 其特征在于， 还 包括： 与所述微处理器相连的显示单元， 用于显示所述微处理器计算得到的被 测高压电能计量装置的整体误差。 The on-line calibrator for a high-voltage electric energy metering device according to claim 1, further comprising: a display unit connected to the microprocessor, configured to display the measured high voltage calculated by the microprocessor The overall error of the energy metering device.
3、根据权利要求 1或 2所述的高压电能计量装置在线校验仪， 其特征在于， 所述采集处理单元包括：  The on-line calibrator for a high-voltage electric energy metering device according to claim 1 or 2, wherein the acquisition processing unit comprises:
用于采集当前回路中的电压值和电流值的传感器模块；  a sensor module for collecting voltage values and current values in a current loop;
与所述传感器模块相连的采样保持模块；  a sample and hold module connected to the sensor module;
与所述采样保持模块相连的模 /数转换模块， 将采集得到的电压值和电流 值分别转换成数字信号；  An analog/digital conversion module connected to the sample and hold module converts the collected voltage value and current value into digital signals respectively;
与所述模 /数转换模块相连的光传模块， 用于将所述电压、 电流数字信号 转换成光信号；  And an optical transmission module connected to the analog/digital conversion module, configured to convert the voltage and current digital signals into optical signals;
与所述采样保持模块、 所述模 /数转换模块及所述光传模块相连的电源模 块。  a power module connected to the sample and hold module, the analog/digital conversion module, and the optical transmission module.
4、根据权利要求 3所述的高压电能计量装置在线校验仪， 其特征在于， 所 述主控单元包括：  The on-line calibrator for a high-voltage electric energy metering device according to claim 3, wherein the main control unit comprises:
用于控制所述微处理器工作状态的控制单元，以及用于调校该高压电能计 量装置在线校验仪的自身测量误差的调校单元。  A control unit for controlling the operating state of the microprocessor, and a calibration unit for adjusting the self-measurement error of the on-line calibrator of the high-voltage energy metering device.
5、根据权利要求 4所述的高压电能计量装置在线校验仪， 其特征在于， 所 述传感器模块包括： 电流传感器和电压传感器。 5. The high-voltage electric energy metering device online calibrator according to claim 4, wherein The sensor module includes: a current sensor and a voltage sensor.
6、根据权利要求 5所述的高压电能计量装置在线校验仪， 其特征在于， 所 述电能计量单元为数字信号处理 DSP微处理器。  The on-line calibrator for high-voltage electric energy metering device according to claim 5, wherein the electric energy measuring unit is a digital signal processing DSP microprocessor.
7、根据权利要求 6所述的高压电能计量装置在线校验仪， 其特征在于， 所 述微处理器及所述主控单元组成单片机。  The on-line calibrator for high-voltage electric energy metering device according to claim 6, wherein the microprocessor and the main control unit constitute a single chip microcomputer.
8、根据权利要求 2所述的高压电能计量装置在线校验仪， 其特征在于， 所 述显示单元为液晶显示器。  The on-line calibrator for a high-voltage electric energy metering device according to claim 2, wherein the display unit is a liquid crystal display.
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