CN206818859U - A high-voltage electric energy meter error calibration device - Google Patents

Abstract

The utility model discloses a kind of high-voltage electric energy meter error checking arrangement, including high-voltage electric energy meter, tested pulse collection unit, standard scale, calibration pulse generation unit, Error Calculator and error checking system, the error checking system includes master controller, display module and gsm communication module, and the master controller is connected with pulse input interface, verification pulse output end mouth and communication interface；The tested pulse collection unit includes optical fiber, photoelectric conversion module and electric pulse capture module；The calibration pulse generation unit includes voltage/current process circuit, A/D convertor circuit, sample circuit and computation chip, the voltage/current process circuit includes current transformer and resitstance voltage divider, the output end of the high-voltage electric energy meter and standard electric energy meter is connected with Error Calculator, and the output end of the Error Calculator is connected with master controller.The utility model realizes the accurate verification to high-voltage electric energy meter, has reached the error checking automatically to high-voltage electric energy meter.

Description

A high-voltage electric energy meter error calibration device

technical field

The utility model relates to an error checking device for a high-voltage electric energy meter.

Background technique

Electric energy metering is the core of the operation of electric power enterprises, and the value of electric energy is reflected by the metering device. The measurement accuracy of the electric energy metering device directly affects the economic interests of both the electricity supplier and the electricity consumer. Therefore, at this stage, power supply enterprises generally carry out periodic on-site verification of the measurement errors of electric energy metering devices. The energy meter error calibration device usually includes a standard source for providing rated working voltage and rated working current to the tested electric energy meter, a standard meter for measuring the output power of the standard source, and a standard meter for collecting the optical pulse generated by the tested electric energy meter. A signal collector, and a device for calculating the error of the tested electric energy meter according to the number of light pulses collected. There are many reasons for the error of the electric energy meter, such as: light-load operation of the electric energy meter, excessive secondary voltage drop, tilting of the electric energy meter, wrong wiring, etc., and the relative error value can only indicate whether the electric energy meter is accurate or not. The existing on-site calibration The inspection system does not record the original data of the operation of the electric energy meter, which lacks practical guiding significance for guiding the operation and maintenance of the electric energy meter.

Utility model content

In order to overcome the deficiencies of the prior art above, the utility model provides a high-voltage electric energy meter error checking device.

The technical scheme adopted in the utility model is:

An error checking device for a high-voltage electric energy meter, comprising a high-voltage electric energy meter, a detected pulse acquisition unit, a standard meter, a standard pulse generating unit, an error calculator, and an error checking system, the error checking system including a main controller, a display module and the GSM communication module, the display module and the GSM communication module are respectively connected with the main controller, and the main controller is connected with a pulse input interface, a check pulse output port and a communication interface, and the communication interface is used to connect the main controller with the Host computer control system communication connection; the detected pulse acquisition unit includes an optical fiber, a photoelectric conversion module and an electric pulse capture module, one end of the optical fiber is connected with a high-voltage electric energy meter, and the other end is connected with a photoelectric conversion module, and the output of the photoelectric conversion module terminal is connected with the electric pulse capture module, and the output terminal of the electric pulse capture module is connected with the pulse input interface; the standard pulse generating unit includes a voltage/current processing circuit, an AD conversion circuit, a sampling circuit and a metering chip, and the voltage/current The current processing circuit includes a current transformer and a resistor divider for collecting three-phase voltage signals and current signals. The voltage/current processing circuit is connected to the input end of the sampling circuit through an AD conversion circuit, and the output end of the sampling circuit is It is connected to the input end of the electric energy metering chip, the output end of the electric energy metering chip is connected to the main controller, the output ends of the high-voltage electric energy meter and the standard electric energy meter are connected to the error calculator, and the output end of the error calculator is connected to the connected to the main controller.

Further, the main controller is also connected with a printer and a memory.

Further, the electric energy metering chip adopts RN8302 type electric energy metering chip.

Further, the input end of the main controller is also connected with a power consumption tester.

Further, the main controller and the power consumption tester communicate bidirectionally through the RS485 serial port.

Further, the main controller is also connected with function keys.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model adopts the detected pulse acquisition unit to collect the electric energy pulse signal to be detected, adopts the standard pulse generating unit to generate the standard electric energy pulse signal, and adopts the error checking system to compare the electric energy pulse signal to be detected with the standard pulse generating unit, so as to realize the detection of high voltage The accurate calibration of the electric energy meter achieves the automatic error calibration of the high-voltage electric energy meter; the optical pulse signal of the high-voltage electric energy meter is collected and transmitted by optical fiber, and the optical pulse signal is converted into the electric pulse recognized by the error calibration system in combination with the photoelectric conversion module signal, avoiding electromagnetic interference, increasing measurement precision and accuracy, and ensuring the normal operation of the error checking device.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Among them, 1. High-voltage electric energy meter, 2. The detected pulse acquisition unit, 3. Standard meter, 4. Standard pulse generation unit, 5. Error calculator, 6. Error calibration system, 7. Main controller, 8. Display Module, 9. GSM communication module, 10. Pulse input interface, 11. Calibration pulse output port, 12. Communication interface, 13. Host computer control system, 14. Printer, 15. Memory, 16. Power consumption tester, 17 , function keys, 18, photoelectric conversion module, 19, electric pulse capture module, 20, voltage/current processing circuit, 21, AD conversion circuit, 22, sampling circuit, 23, metering chip, 24, current transformer, 25, resistance voltage divider.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in FIG. 1 , a high-voltage electric energy meter error verification device includes a high-voltage electric energy meter 1 , a detected pulse acquisition unit 2 , a standard meter 3 , a standard pulse generation unit 4 , an error calculator 5 and an error verification system 6 .

Described error checking system 6 comprises main controller 7, display module 8 and GSM communication module 9, and described display module 8 and GSM communication module 9 are connected with main controller 7 respectively, and described display module 8 sampling touch screen is used for Display real-time error and the verification parameter that accepts the verification person's input; The GSM communication module 9 is used to send error information to relevant department managers; The main controller 7 is connected with a pulse input interface 10, a verification pulse output port 11 And communication interface 12, communication interface is used for main controller and upper computer control system 13 communication connection, described main controller is also connected with printer 14 and memory 15, and the input end of main controller is also connected with power consumption tester 16 , the two-way communication between the main controller and the power consumption tester 16 is through the RS485 serial port; the main controller is also connected with function keys 17 .

The detected pulse acquisition unit 2 includes an optical fiber, a photoelectric conversion module 18 and an electrical pulse capture module 19. One end of the optical fiber is connected to the high-voltage electric energy meter 1, and the other end is connected to the photoelectric conversion module 18. The optical pulse signal to be measured on the high-voltage electric meter is converted into the electrical energy pulse signal to be measured by the photoelectric conversion module into an electrical energy pulse signal suitable for receiving by the electrical pulse capture module, and the electrical energy pulse signal to be measured is transmitted to the electrical pulse capture module 19. After the pulse capture module 19 processes the electric energy pulse signal to be measured, it transmits the electric energy pulse signal to the pulse input interface, and the main controller 7 obtains the electric energy pulse signal of the high voltage electric energy meter under test through the pulse input interface.

Described standard pulse generating unit 4 comprises voltage/current processing circuit 20, AD conversion circuit 21, sampling circuit 22 and metering chip 23, and described voltage/current processing circuit 20 comprises current transformer 24 and resistance voltage divider 25, and current mutual inductance The device 24 is used to collect the three-phase current signal and input it in the AD conversion circuit 21, and the resistance voltage divider 25 is used to collect the three-phase voltage signal and input it in the AD conversion circuit 21, after the analog-to-digital conversion is carried out by the AD conversion circuit 21, it is delivered to In the sampling circuit 22, the output end of the sampling circuit is connected to the input end of the electric energy metering chip 23, and the electric energy metering chip 23 adopts the electric energy metering chip of the RN8302 model, and the electric energy metering chip 23 processes the voltage signal and the current signal. Electric energy pulse signal, the electric energy metering chip 23 transmits the standard electric energy pulse signal to the main controller 7, and the main controller 7 compares the pulse signal to be measured with the standard electric energy pulse signal to generate an error value, and saves and records the error value . The output terminals of the high-voltage electric energy meter 1 and the standard meter 3 are connected to an error calculator, and the output terminals of the error calculator are connected to a main controller.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (6)

1. A high-voltage electric energy meter error calibration device is characterized in that it comprises a high-voltage electric energy meter, a detected pulse acquisition unit, a standard meter, a standard pulse generation unit, an error calculator and an error calibration system, and the error calibration system It includes a main controller, a display module and a GSM communication module, the display module and the GSM communication module are respectively connected to the main controller, and the main controller is connected with a pulse input interface, a check pulse output port and a communication interface, and the communication interface is used for The main controller is communicated with the upper computer control system; the detected pulse acquisition unit includes an optical fiber, a photoelectric conversion module and an electrical pulse capture module, one end of the optical fiber is connected to a high-voltage electric energy meter, and the other end is connected to a photoelectric conversion module. The output end of the photoelectric conversion module is connected with the electric pulse capture module, and the output end of the electric pulse capture module is connected with the pulse input interface; the standard pulse generation unit includes a voltage/current processing circuit, an AD conversion circuit, a sampling circuit and a metering Chip, the voltage/current processing circuit includes a current transformer and a resistor divider for collecting three-phase voltage signals and current signals, and the voltage/current processing circuit is connected to the input terminal of the sampling circuit through an AD conversion circuit, so The output end of the sampling circuit is connected with the input end of the electric energy metering chip, the output end of the electric energy metering chip is connected with the main controller, the output ends of the high-voltage electric energy meter and the standard electric energy meter are connected with the error calculator, and the error calculator The output terminal of the calculator is connected with the main controller. 2. A kind of high voltage electric energy meter error verification device according to claim 1, is characterized in that, described master controller is also connected with printer and memory. 3. A high-voltage electric energy meter error checking device according to claim 1, wherein the electric energy metering chip is an electric energy metering chip of RN8302 type. 4. A high-voltage electric energy meter error checking device according to claim 1, characterized in that, the input end of the main controller is also connected with a power consumption tester. 5. A high-voltage electric energy meter error checking device according to claim 1, characterized in that, the main controller and the power consumption tester communicate bidirectionally through the RS485 serial port. 6 . The error checking device for a high-voltage electric energy meter according to claim 1 , wherein the main controller is also connected with function keys. 6 .