CN113985343B - Online sampling inspection device for electric energy meter and application method thereof - Google Patents
Online sampling inspection device for electric energy meter and application method thereof Download PDFInfo
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- CN113985343B CN113985343B CN202111636544.3A CN202111636544A CN113985343B CN 113985343 B CN113985343 B CN 113985343B CN 202111636544 A CN202111636544 A CN 202111636544A CN 113985343 B CN113985343 B CN 113985343B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- 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
Abstract
The invention discloses an electric energy meter online sampling inspection device and an application method thereof, belonging to the technical field of electric energy metering and comprising the following steps: the device comprises an electric energy meter online sampling detection device and a detected detection device which compares the collected pulse frequency with the pulse frequency collected by the electric energy meter online sampling detection device and remotely checks the pulse frequency; the communication module is matched with the PC electric energy meter checking management system, so that the electric energy meter online selective checking device can be remotely controlled to check, a group of detection personnel can detect the verification devices at a plurality of places at one time, the arrangement of the checking date is controllable, and the possibility of overdue standard calibration of the checking equipment is greatly reduced; detection personnel do not need to go to and go from each unit, and the risk of carrying viruses to spread and infect the range is avoided; meanwhile, portability does not need to be considered, an electric energy meter online spot inspection device can be arranged in each place, standard equipment can be larger equipment, accuracy of each test epitope can be considered, and calibration blind areas are not reserved.
Description
Technical Field
The invention belongs to the technical field of electric energy metering, and particularly relates to an electric energy meter online sampling inspection device and an application method thereof.
Background
The electric power is one of the prop industries in China, the population cardinality of China is numerous, and the demand on the electric quantity is also large; with the development of the times and the progress of the society, people put higher requirements on the safety of power utilization and the power supply capacity; the electric energy metering equipment is an indispensable part in the electric power system, and the quality of the electric energy metering equipment is directly related to the safety and the stability of the electric power system; therefore, the quality of electric energy metering is improved, so that the electric energy meter needs to be verified;
at present, each provincial marketing service center bears the verification and distribution work of the electric energy metering device in China, and the high-efficiency operation of the automatic verification of the electric energy metering device is urgently realized on the premise of ensuring the safety and reliability of production operation in the face of large-scale demand;
the prior automatic calibration device of the electric energy meter needs to be periodically calibrated, in the prior art, when the automatic calibration device of the electric energy meter is periodically calibrated, the prior art generally needs to be in contact with a measurement supervision detection institute in advance, the calibration operation time is communicated and arranged, and a detection institute worker carries equipment to arrive at a site to use a standard electric energy meter and a calibration equipment wiring comparison standard, wherein the method has the following defects and disadvantages: the staff scheduling of a measurement supervision and detection institute is needed, when more staff are in shortage, the arrangement of the verification date is uncontrollable, and the possibility of overdue standard calibration of the verification equipment exists; the detection personnel come and go to each unit, and the risk of carrying virus and spreading infection range exists; the standard electric energy meter is required to be carried to the site for verification, the possibility of inaccuracy or damage exists in the transportation process of the equipment, the accuracy is reduced if the equipment is transported, and no equipment is used for calibrating the equipment after the equipment arrives at the site; in the field operation, the portability is considered, the standard equipment is not too large, so that the function is limited to only calibrating the accuracy of the whole equipment of the calibration device, the accuracy of each test epitope cannot be considered, and a calibration blind area is left, so that the device and the method for online sampling inspection of the electric energy meter are required to be developed to solve the existing problems.
Disclosure of Invention
The invention aims to provide an electric energy meter online sampling inspection device and an application method thereof, and aims to solve the problem that accuracy is reduced due to instrument transportation in field calibration.
In order to achieve the purpose, the invention provides the following technical scheme: an online sampling inspection device for an electric energy meter comprises: the device comprises an electric energy meter online sampling detection unit and a detected detection device which compares the acquired pulse frequency with the pulse frequency acquired by the electric energy meter online sampling detection unit and remotely checks the pulse frequency;
the detection subject device includes:
a signal control unit;
the standard power source is used for receiving the signal of the signal control unit;
the measured standard electric energy metering module is connected with the standard power source and sends standard electric energy pulses to the measured error calculating module;
the measured error calculation module is used for comparing the collected electric energy meter electric quantity data to be detected with the measured standard electric energy metering module to obtain an error numerical value of the electric energy meter to be detected;
the current divider is used for collecting current sampling signals;
the voltage divider is used for acquiring a voltage sampling signal;
the multiplier is used for multiplying the input current sampling signal and the input voltage sampling signal, generating counting pulses with frequencies in direct proportion to the product of voltage and current through frequency conversion, and outputting the counting pulses to a pulse terminal;
and the PC electric energy meter checking management system is connected with the standard power source and is used for comparing and remotely checking the pulse frequency acquired by the epitope pulse terminal and the pulse frequency of the measured standard electric energy metering module and sending a signal to the signal control unit.
The online spot check unit of electric energy meter includes:
the sampling inspection standard electric energy metering module is connected with the detected standard electric energy metering module and the detected electric energy meter and sends standard standby electric energy pulses to the sampling inspection error calculation module;
the sampling error calculation module is used for comparing the collected electric energy meter electric quantity data to be detected with the sampling standard electric energy metering module to obtain an error numerical value of the electric energy meter to be detected;
the PC electric energy on-line spot check detection system is used for being connected with a standard power source and connected into a loop of a detected device;
the communication module is used for transmitting detection data to a PC electric energy meter verification management system through a wireless public network and receiving control information of the PC electric energy meter verification management system, and the detection data comprises: and the error value of the detected electric energy meter is obtained by the detected error calculation module and the error value of the detected electric energy meter is obtained by the sampling detection error calculation module.
Preferably, the measured standard electric energy metering module is connected with the PC electric energy meter calibration management system and the measured error calculation module through a CAN bus.
Preferably, the measured standard electric energy metering module and the sampling inspection standard electric energy metering module are both three-phase multifunctional standard electric energy meters.
Preferably, the PC electric energy meter checking management system is connected with the standard power source and the error calculation module through the RS485 serial port to be tested respectively.
Preferably, the standard power source is connected with the measured standard electric energy metering module through an RS232 serial port.
Preferably, the electric energy meter online spot check unit further comprises an electric energy meter online spot check detection data platform, and the electric energy meter online spot check detection data platform is in data interaction with the PC electric energy meter verification management system.
The invention also discloses an application method of the electric energy meter online sampling inspection device, which comprises the following steps:
step 1, setting a detected error calculation module and a sampling error calculation module;
step 2, connecting the online sampling detection unit of the electric energy meter into a loop of a detected device in series, wherein the standard power source, the detected standard electric energy metering module, the sampling detection standard electric energy metering module and the detected electric energy meter form a loop;
step 3, connecting the electric energy meter online sampling detection unit with each epitope pulse terminal in the detected detection device;
and 4, feeding back the monitoring data of the electric energy meter online sampling detection unit to a PC electric energy meter checking management system in real time through a communication module, and comparing the pulse frequency of the electric energy meter online sampling detection unit with the pulse frequency acquired from the detected detection device and remotely checking by the PC electric energy meter checking management system.
The invention has the technical effects and advantages that: the electric energy meter online selective inspection device and the application method thereof can realize remote control of the electric energy meter online selective inspection device for checking through the cooperation of the communication module and the PC electric energy meter checking management system, a group of detection personnel can detect the verification devices at a plurality of places at one time, the arrangement of checking dates is controllable, and the possibility of overdue standard calibration of the checking equipment is greatly reduced; detection personnel do not need to go to and go from each unit, and the risk of carrying viruses to spread and infect the range is avoided; meanwhile, portability does not need to be considered, an electric energy meter online spot inspection device can be arranged in each place, standard equipment can be larger equipment, accuracy of each test epitope can be considered, and calibration blind areas are not reserved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an electric energy meter online sampling inspection device as shown in figure 1, which comprises: the device comprises an electric energy meter online sampling detection unit and a detected detection device which compares the acquired pulse frequency with the pulse frequency acquired by the electric energy meter online sampling detection unit and remotely checks the pulse frequency;
the detection subject device includes:
a signal control unit;
the standard power source is used for receiving the signal of the signal control unit; in this embodiment, the standard power source is connected to the standard electric energy metering module to be measured via an RS232 serial port.
The measured standard electric energy metering module is connected with the standard power source and sends standard electric energy pulses to the measured error calculating module; in this embodiment, the measured standard electric energy metering module is connected with the PC electric energy meter calibration management system and the measured error calculation module through the CAN bus; the standard electric energy metering module is a three-phase multifunctional standard electric energy meter.
The measured error calculation module is used for comparing the collected electric energy meter electric quantity data to be detected with the measured standard electric energy metering module to obtain an error numerical value of the electric energy meter to be detected;
the current divider is used for collecting current sampling signals;
the voltage divider is used for acquiring a voltage sampling signal;
the multiplier is used for multiplying the input current sampling signal and the input voltage sampling signal, generating counting pulses with frequencies in direct proportion to the product of voltage and current through frequency conversion and outputting the counting pulses to a pulse terminal;
the PC electric energy meter checking management system is connected with the standard power source and used for comparing and remotely checking the pulse frequency acquired by the epitope pulse terminal with the pulse frequency of the measured standard electric energy metering module and sending a signal to the signal control unit;
the online spot check unit of electric energy meter includes:
the sampling inspection standard electric energy metering module is connected with the detected standard electric energy metering module and the detected electric energy meter and sends standard standby electric energy pulses to the sampling inspection error calculation module;
the sampling error calculation module is used for comparing the collected electric energy meter electric quantity data to be detected with the sampling standard electric energy metering module to obtain an error numerical value of the electric energy meter to be detected; in the embodiment, the spot check error calculation module is connected with the epitope auxiliary terminal, and the epitope error is calculated by comparing the pulse frequency of the epitope and the standard electric energy meter of the online spot check device;
the PC electric energy on-line spot check detection system is used for being connected with a standard power source and connected into a loop of a detected device; when the online spot check detection system detects, the system is accessed into a loop of a detected detection system and shares a common standard power source with the detected detection system;
and the communication module is used for transmitting the detection data to the PC electric energy meter verification management system through a wireless public network and receiving the control information of the PC electric energy meter verification management system.
The electric energy meter online spot check detection data platform is in data interaction with a PC electric energy meter calibration management system, transmits local data to the electric energy meter online spot check detection data platform, and comprises the following detection data: and the error value of the detected electric energy meter is obtained by the detected error calculation module and the error value of the detected electric energy meter is obtained by the sampling detection error calculation module.
The tested standard electric energy metering module and the sampling inspection standard electric energy metering module are three-phase multifunctional standard electric energy meters, and are used as standard participating electric quantity metering devices tracing to the superior unit;
the tested standard electric energy metering module and the tested error calculator connect the electric energy meter online sampling detection unit into a tested detection device loop in series, and the tested standard power source, the tested standard electric energy metering module, the sampling detection standard electric energy metering module and the tested electric energy meter of each epitope in the tested detection device form a voltage current loop;
the invention also provides an application method of the electric energy meter online sampling inspection device shown in fig. 2, which comprises the following steps:
step 1, setting a detected error calculation module and a sampling error calculation module;
step 2, connecting the online sampling detection unit of the electric energy meter into a loop of a detected device in series, wherein the standard power source, the detected standard electric energy metering module, the sampling detection standard electric energy metering module and the detected electric energy meter form a loop;
step 3, connecting the electric energy meter online sampling detection unit with each epitope pulse terminal in the detected detection device;
step 4, feeding back monitoring data of the electric energy meter online sampling detection unit to a PC electric energy meter checking management system in real time through a communication module, comparing the pulse frequency of the electric energy meter online sampling detection unit with the pulse frequency collected from the detected detection device by the PC electric energy meter checking management system, and checking remotely;
in this embodiment, 24 sets of sampling error calculators are arranged in the electric energy meter online sampling device, and 24 epitopes are compared at a time; the electric energy meter online selective inspection device can realize remote control of the electric energy meter online selective inspection device for checking through the cooperation of the GPRS communication module and the PC electric energy meter checking management system, a group of detection personnel can detect the verification devices at a plurality of places at one time, the arrangement of checking dates is controllable, and the possibility of overdue standard calibration of the checking equipment is greatly reduced; and detection personnel do not need to go to and go from each unit, and the risk of carrying virus to spread infection range is avoided.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides an online selective examination device of electric energy meter which characterized in that: the method comprises the following steps: the device comprises an electric energy meter online sampling detection unit and a detected detection device which compares the acquired pulse frequency with the pulse frequency acquired by the electric energy meter online sampling detection unit and remotely checks the pulse frequency;
the detection subject device includes:
a signal control unit;
the standard power source is used for receiving the signal of the signal control unit;
the measured standard electric energy metering module is connected with the standard power source and sends standard electric energy pulses to the measured error calculation module;
the measured error calculation module is used for comparing the collected electric energy meter electric quantity data to be detected with the measured standard electric energy metering module to obtain an error numerical value of the electric energy meter to be detected;
the current divider is used for collecting current sampling signals;
the voltage divider is used for acquiring a voltage sampling signal;
the multiplier multiplies the input current sampling signal and the input voltage sampling signal, generates counting pulses with frequencies in direct proportion to the product of voltage and current through frequency conversion, and outputs the counting pulses to a pulse terminal;
the PC electric energy meter checking management system is connected with the standard power source and is used for comparing the pulse frequency acquired by the epitope pulse terminal with the pulse frequency of the measured standard electric energy metering module, remotely checking and then sending a signal to the signal control unit;
the online spot check unit of electric energy meter includes:
the sampling inspection standard electric energy metering module is connected with the detected standard electric energy metering module and the detected electric energy meter and sends standard electric energy pulses to the sampling inspection error calculation module;
the sampling error calculation module is used for comparing the collected electric energy meter electric quantity data to be detected with the sampling standard electric energy metering module to obtain an error numerical value of the electric energy meter to be detected;
the PC electric energy on-line spot check detection system is used for being connected with a standard power source and connected into a loop of a detected device;
the communication module is used for transmitting the detection data to a PC electric energy meter calibration management system through a wireless public network and receiving control information of the PC electric energy meter calibration management system; the detection data includes: and the error value of the detected electric energy meter is obtained by the detected error calculation module and the error value of the detected electric energy meter is obtained by the sampling detection error calculation module.
2. The on-line sampling device of the electric energy meter according to claim 1, characterized in that: and the measured standard electric energy metering module is connected with the PC electric energy meter calibration management system and the measured error calculation module through the CAN bus.
3. The on-line sampling device of the electric energy meter according to claim 1, characterized in that: the measured standard electric energy metering module and the sampling inspection standard electric energy metering module are both three-phase multifunctional standard electric energy meters.
4. The on-line sampling device of the electric energy meter according to claim 1, characterized in that: and the PC electric energy meter checking management system is connected with the standard power source and the measured error calculation module through RS485 serial ports respectively.
5. The on-line sampling device of the electric energy meter according to claim 1, characterized in that: and the standard power source is connected with the measured standard electric energy metering module through an RS232 serial port.
6. The on-line sampling device of the electric energy meter according to claim 1, characterized in that: the electric energy meter online spot check unit further comprises an electric energy meter online spot check detection data platform, and the electric energy meter online spot check detection data platform is in data interaction with the PC electric energy meter checking management system.
7. The application method of the electric energy meter online spot check device based on any one of claims 1-6 is characterized in that: the method comprises the following steps:
step 1, setting a detected error calculation module and a sampling error calculation module;
step 2, connecting the online sampling detection unit of the electric energy meter into a loop of a detected device in series, wherein the standard power source, the detected standard electric energy metering module, the sampling detection standard electric energy metering module and the detected electric energy meter form a loop;
step 3, connecting the electric energy meter online sampling detection unit with each epitope pulse terminal in the detected detection device;
and 4, feeding back the monitoring data of the electric energy meter online sampling detection unit to a PC electric energy meter checking management system in real time through a communication module, and comparing the pulse frequency of the electric energy meter online sampling detection unit with the pulse frequency acquired from the detected detection device and remotely checking by the PC electric energy meter checking management system.
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