CN111175689A - Quick electric energy meter calibration device and use method - Google Patents
Quick electric energy meter calibration device and use method Download PDFInfo
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- CN111175689A CN111175689A CN202010131771.XA CN202010131771A CN111175689A CN 111175689 A CN111175689 A CN 111175689A CN 202010131771 A CN202010131771 A CN 202010131771A CN 111175689 A CN111175689 A CN 111175689A
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- 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
Abstract
The invention belongs to the technical field of electric energy meter calibration, in particular to a rapid electric energy meter calibration device and a using method thereof, which comprises a shell and a display module I used for displaying voltage error, current error, power error and metering error of an electric energy meter measured by the calibration device, a metering unit II for converting the user load into a measurable current by the current coil and metering the measurable current, the communication unit III is used for communication connection and information uploading, the power supply unit IV is used for converting commercial power into power required by the interior of the electric energy meter and charging a standby battery, the control unit VI is used for control and coordination, and the storage module V is used for storing information.
Description
Technical Field
The invention belongs to the technical field of electric energy meter calibration, and particularly relates to a rapid electric energy meter calibration device and a use method thereof.
Background
At present, electricity stealing occurs sometimes, an electric power enterprise continuously perfects an integrated anti-theft and illegal work mode of checking, managing and controlling, a 'skynet' anti-electricity stealing concentrated striking special action is normalized, and illegal behaviors such as electricity stealing, illegal electricity utilization and the like are struck in various measures and in combination with medium and low voltage line loss treatment work. The method has the advantages that the lean management of illegal work of anti-theft check is continuously strengthened, the monitoring function of the power utilization information acquisition system is perfected, illegal behaviors existing in abnormal lines and distribution areas of line loss are deeply dug, and the daily monitoring on line loss indexes of the managed distribution areas is strengthened. The method has the advantages that advanced technical means are actively researched, applied and popularized, a power stealing behavior prediction model based on big data is constructed, the power stealing user analysis and positioning functions of an anti-power-stealing inspection monitoring platform are comprehensively supported in practice, the range of suspected users is remarkably reduced, and the field inspection workload is reduced; the method comprises the steps of establishing a loss-reducing anti-theft technical service team to deeply check illegal work, popularizing and applying novel technical prevention measures such as a cloud-side cooperative computing technology and the like, and continuously expanding the battle results.
The loss reduction and anti-theft technical service team combines a big data electricity stealing behavior prediction model to carry out on-site investigation, evidence search and electricity stealing prevention. The electricity stealing technology of electricity stealing molecules is also changed, some electric energy meters are disguised after being transformed, whether the electric energy meters are transformed by the electricity stealing molecules on site or not can be found through visual judgment, and the possibility of electricity stealing behavior can be greatly reduced. Under normal conditions, there are six electric energy meters in every ammeter case, and what has done just is "trick", and the electric energy meter error is what, punishs and lacks the basis, if tear open the back and carry out the check-up, influences the user power supply again, gives on-the-spot fortune dimension personnel everyone and is equipped with a check gauge, but the investment is too high, does not conform to actual conditions. The anti-electricity-theft behavior is a constant work, the medium and low voltage line loss management responsibility system is comprehensively implemented, rebound is prevented, and loss and efficiency are practically reduced. The illegal work result of anti-theft check is consolidated, the work quality and efficiency are improved, and the legal operation rights and interests of the company are guaranteed.
The currently used electric energy meter calibration device is provided with a desk type calibration device and a field calibration instrument. The desk type calibration device can calibrate a plurality of electric energy meters at one time, is high in speed and precision, but cannot be carried. The on-site calibrator can be carried, but is complex to operate, and the price is higher, can not popularize and apply comprehensively.
Patent document No. CN 108663650 a discloses an electric energy meter field calibration apparatus and method, including: the electric energy acquisition module of the acquisition module is connected in series with a power grid where the electric energy meter to be detected is located to acquire electric energy data, and the temperature acquisition module of the acquisition module is used for acquiring temperature data of the electric energy acquisition module; the temperature compensation execution module comprises a heater and a thermal cycling device, wherein the heater is arranged on a heat conducting medium of the thermal cycling device; and the control module comprises a memory, an error correction value is stored in the memory, and the control module is in communication connection with the acquisition module and the temperature compensation execution module and is used for controlling the heater to work synchronously in cooperation with the thermal circulation device according to the temperature data output by the acquisition module so as to maintain the temperature of the electric energy acquisition module at a set temperature, obtaining the error correction value from the memory and calculating the electric energy error of the tested electric energy meter. The electric energy meter on-site calibration device and the method are inconvenient to operate, and the whole electric energy meter calibration process can spend a large amount of time of a user, so that the efficiency of the electric energy meter calibration process is low.
Patent document No. CN 208172236U discloses an electric energy meter calibration apparatus, including: the device comprises a negative terminal, a positive terminal, a first electromagnetic relay switch, a second electromagnetic relay switch, a control branch, an electric energy metering device, a heating device and a heat dissipation device; the control branch comprises: the starting key, the third electromagnetic relay switch, the electromagnetic relay coil, the normally closed time delay off time relay switch and the time relay coil; when the start button is pressed, the electromagnetic relay coil is electrified, so that the first electromagnetic relay switch, the second electromagnetic relay switch and the third electromagnetic relay switch are controlled to be closed, the time relay coil is electrified and starts timing, and after a preset set value is reached, the time relay switch which is normally closed and is in delayed disconnection is controlled to be disconnected.
Disclosure of Invention
The invention aims to provide a quick calibration device for a single-phase electric energy meter aiming at the problems in the prior art, which is used for field calibration of the electric energy meter, can find the problems of the electric energy meter in time and avoid electricity stealing.
The technical scheme of the invention is as follows:
the utility model provides a quick electric energy meter calibration equipment, includes the casing, still including being used for showing the display module I of voltage error, current error, power error and the metering error of meter calibrating equipment measurement electric energy meter, change user's load into through the current coil and can be measured the current and be used for the metering unit II, a communication unit III for communication connection and upload information, convert the commercial power into the inside required power of electric energy meter and carry out the power supply unit IV that charges to the reserve battery, a control unit VI for control and coordination and a storage module V for storing information.
The metering unit II and the communication unit III are connected with the control unit VI; the display module I and the storage module V are respectively connected with the control unit VI, and the power supply unit IV supplies electric quantity to the whole electric energy meter calibration device.
Specifically, the display module I comprises an LCD display screen arranged on the shell.
Specifically, the metering unit II comprises a current module, a voltage module, a metering module and a clock module for timing, wherein the current module converts a user load into a measurable current through a current coil and transmits the measurable current to the metering module for metering, the voltage module measures user voltage and transmits the user voltage to the metering module for metering, the metering module receives information transmitted by the current module and the voltage module, and sets a metering formula for temperature compensation, user power consumption and electric energy used by a user, and a calculation formula is set in the electric energy meter calibration device for calibrating the electric energy meter of the user and calculating an error for reference of equipment operation and maintenance personnel.
Specifically, the communication unit III comprises a communication interface, an infrared switch and an infrared sampling loop which are arranged on the shell, and the infrared sampling loop is connected with the infrared switch to realize wireless communication connection with the control unit; the communication interface is connected with the communication interface of the tested electric energy meter to realize wired communication connection with the control unit, and information of the tested electric energy meter is uploaded to the rapid electric energy meter calibration device in real time.
And the power supply unit IV comprises a power supply management module and a standby battery, the power supply management module converts commercial power into power supply required by the interior of the electric energy meter and supplies power to each unit of the electric energy meter calibration device, and meanwhile, the standby battery is charged.
Specifically, the control unit VI comprises an MCU singlechip.
Specifically, the front surface of the shell is provided with an infrared switch, an operating key, an indicator lamp, a wiring terminal and a communication interface, wherein the operating key comprises a function key, a start key, a precision adjusting key and a storage key.
Specifically, the quick electric energy meter calibration device is connected with the tested electric energy meter through a test resistor, and the method comprises the following steps:
s1, according to analysis or report by people, a suspected electricity stealing user is found, operation and maintenance personnel arrive at the site to inform the user to perform power failure check, the electric meter box is opened, whether the lead seal of the electric energy meter is moved or not and whether the electric energy meter is normal or not are preliminarily checked, a user switch is pulled open, and user wiring is removed;
s2, two terminals of a connecting terminal of the quick electric energy meter calibration device are respectively connected with two ends of a test resistor, and the other two terminals of the connecting terminal of the quick electric energy meter calibration device are respectively connected with two connecting terminals of a user tested electric energy meter through a user switch to form a primary loop;
s3, connecting a communication loop through the communication interface of the quick electric energy meter calibration device and the communication interface of the user tested electric energy meter by using a communication line;
s4, closing a user switch;
s5, pressing a meter calibration device start button, uploading the data of the measured electric energy meter to a quick electric energy meter calibration device in real time through a communication line, displaying the indicating lamp as a green lamp by a red lamp after the data communication is normal, and starting calibration;
s6, displaying the verification result and the error through a display screen, and performing page turning operation through a function key to display different data;
s7, storing the verification data by pressing a storage key;
and S8, after the verification is finished, closing the user switch, detaching the test wire and the communication wire, restoring the user electric energy meter to be normal, and if a problem is found, detaching the electric energy meter for further verification and processing according to the regulations.
Specifically, in step S5, the voltage error calculation formula in the metering unit of the rapid electric energy meter calibration device is set
Equation of current error calculation
Equation of power error calculation
Calculation formula of electric energy error
And (6) performing calculation.
With the development of science and technology, the mechanical meters currently used in the market are eliminated and replaced by electronic electric energy meters. In the process of using the electronic electric energy meter, the electronic electric energy meter is not perfect, and lawless persons can still change the error of the electric energy meter by means of hardware, software, external force, strong magnetism, instantaneous high voltage and the like, so that the negative error or the unmeasurable amount of the electric energy meter is caused, and the purpose of stealing electricity is achieved. For electricity stealing behaviors, measures taken by related departments are generally to strengthen management, take precautionary measures or avoid electricity stealing phenomena and the like.
The electricity stealing behavior is divided into two types according to whether the meter cover is opened or not, the first type is used for opening the meter cover, the method is simple, electricity stealing molecules open the meter cover by damaging a lock of the meter box and a lead seal on the watt-hour meter, short-circuit the internal inlet and outlet wires, and the internal elements are replaced or damaged to enable the internal elements not to be metered or to be metered less, so that the purpose of electricity stealing is achieved. Another is that without opening the cover, 4 kinds of electricity stealing behaviors can be summarized: severe overload, super electric field, super magnetic field, and injected harmonic, which are intended to interfere with the normal operation of electronic equipment, resulting in data loss or crash. Aiming at electricity stealing behaviors, electric power enterprises generally adopt the technical scheme that internal organizational measures are strengthened and electric energy metering technical management is strengthened, daily work is done well and finely according to a principle, lawless persons lose the opportunity of electricity stealing, work is done before the electricity stealing behaviors, and the electricity stealing molecules cannot be punished without exact evidence aiming at the electricity stealing non-generating molecules.
No matter which electricity stealing method is adopted, the electric meter is in failure by changing the external environment or the internal environment, so that the aim of metering no matter what the amount of electricity is achieved. The electric energy meter metering is that a current transformer is connected with a voltage transformer, large current is changed into small current according to a certain transformation ratio, and high voltage is converted into low voltage for recording. Primary current is original size still, steals electric molecule and mainly changes secondary current, for example to current module short circuit, perhaps utilizes resistance and voltage module to concatenate, records again through the measurement mode of setting for, can produce great error, and present electric energy meter all is intelligent electric energy meter, and the display screen also can show current or voltage, and whether unable judgement is accurate, more can't judge the error.
Based on the reasons, the invention provides the electric energy meter checking device, which is used for checking the electric energy meter with the electricity stealing behavior, detecting the error of the electric energy meter as the evidence of electricity stealing, and punishing the electricity stealing molecules by the power company. The calibration device is formed by technically transforming an electric energy meter with higher precision, is small in investment and convenient to carry, can be calibrated only by connecting two power lines and one communication line on site according to requirements, greatly improves the working efficiency, finds that errors are large, can judge that the electric energy meter has problems, has the suspicion of electricity stealing, removes the electric energy meter with problems, takes a calibration stand to calibrate again, and penalizes according to the error.
The invention has the beneficial effects that: the quick calibration device comprises a display module I for displaying a voltage error, a current error, a power error and a metering error of an electric energy meter measured by the calibration device, a metering unit II for converting a user load into a measurable current through a current coil and metering, a communication unit III for communicating, connecting and uploading information, a power supply unit IV for converting commercial power into a power supply required by the interior of the electric energy meter and charging a standby battery, a control unit VI for controlling and coordinating and a control unit V for storing information; the metering unit II, the communication unit III and the control unit VI are connected, the display module I and the storage module V are respectively connected with the control unit VI, and the power supply unit IV supplies electricity to the whole electric energy meter checking device.
And the display module I displays the voltage error, the current error, the power error, the metering error and the like of the meter calibrating device and the measured electric energy meter, so as to judge whether the electric energy meter is qualified or not. If the error of the test result is large, the electric energy meter is preliminarily judged to have a problem in the aspect of metering, operation and maintenance personnel can open the electric energy meter cover on the site, carefully investigate whether the voltage coil is connected with the resistor in series or not, whether the current coil is connected with the resistor in parallel or not, whether internal elements are replaced or not and the like, take the electric energy meter cover to a meter calibration room for further verification, determine the actual error, analyze big data according to an electric power acquisition system of a metering department, judge when electricity stealing starts, combine the error, perform punishment and recover the loss of an electric power company.
The metering unit II comprises a current module, a voltage module, a high-precision metering module and a clock module, wherein the current module converts user load into measurable current through a current coil for metering, the voltage module measures user voltage, the clock module is used for timing, the high-precision metering module is provided with a metering formula and temperature compensation, the user current is multiplied by the user voltage to be equal to user power consumption, the user power consumption is multiplied by power consumption time to be equal to user electric energy, and the electric energy meter calibration device is internally provided with a calculation formula for calibrating a user electric energy meter and calculating errors to be referenced by equipment operation and maintenance personnel.
The communication unit III comprises a 485 communication interface and an infrared sampling loop, the 485 communication interface is connected with the 485 communication interface of the tested electric energy meter through a 485 communication line, and the information of the tested electric energy meter is uploaded to the meter calibrating device in real time and is used for error calculation. The infrared interface is a wireless interface of the meter calibrating device, each electric energy meter has respective communication address, generally, the communication addresses are several digits behind a bar code of the electric energy meter, wireless communication is realized through an infrared sampling loop implemented by the electric energy meter to be tested, and the electric energy meter to be tested is selected to be connected with the meter calibrating device and the communication address of the electric energy meter is input.
The power management module converts commercial power into power required by the interior of the electric energy meter and charges the standby battery. The storage module is used for storing test data. The control part comprises an MCU singlechip. All units and modules are controlled and coordinated by the MCU singlechip.
The quick electric energy meter calibration device provided by the invention has the advantages that the structure is small and exquisite, the weight is light, the carrying is convenient, 2 copper wires with the length of 2.5mm are connected, and if the infrared communication is utilized, 2 copper wires with the length of 2.5mm are needed, a connection loop is simple, the operation is easy, and the working efficiency is greatly improved; the display is visual, the speed is fast, the cost is saved, a panel of the meter calibrating device is provided with a corresponding function key, a 'start' key is pressed, the device starts to be started, a 'precision' key is pressed, the device switches the resistance value of the variable resistor, a 'save' key is pressed, and the device automatically saves the current test data; the device wiring terminal is connected with the resistor and the power line, when the meter is checked, the meter calibration device is taken out, and the corresponding wiring is connected, so that the meter calibration can be started. The device provided by the invention is reasonable in design, is used for checking single-phase electric energy meters with various specifications, is convenient to use, and provides a good tool for checking the electric energy meters, so that the checking efficiency of the electric energy meters is improved.
Drawings
FIG. 1 is a schematic diagram of a panel structure of a rapid electric energy meter calibration device according to the present invention;
FIG. 2 is a schematic diagram of the fast calibration device for electric energy meter according to the present invention;
FIG. 3 is a schematic diagram of an external resistance test circuit of the rapid electric energy meter calibration device according to the present invention;
FIG. 4 is a circuit diagram of a fast calibration device of the electric energy meter of the present invention;
FIG. 5 is a schematic diagram of the wiring of the fast calibration device for the electric energy meter according to the present invention;
FIG. 6 is a circuit diagram of a test circuit of an internal resistor of the fast calibration device of the electric energy meter.
I is a display module, II is a metering unit, III is a communication unit, IV is a power supply unit, V storage module, VI is a control unit, 1 ammeter box, 2 ammeter, 3 quick ammeter calibration device, 33 display screen, 34 infrared switch, 35 function key, 36 indicator light, 37 start key, 38 precision adjusting key, 39 save key, 301 binding post, 302 communication interface, 4 user switch, 5 resistor and 6 measured ammeter.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
Fig. 1 is a schematic diagram of a structure of a fast electric energy meter calibration apparatus provided in this embodiment, fig. 2 is a schematic diagram, fig. 4 is a circuit diagram, and the apparatus includes a housing, a display module i for displaying a voltage error, a current error, a power error, and a metering error of the electric energy meter measured by the calibration apparatus, a metering unit ii for converting a user load into a measurable current through a current coil and for metering, a communication unit iii for communication connection and uploading information, a power supply unit iv for converting a commercial power into a power supply required inside the electric energy meter and charging a backup battery, a control unit vi for control and coordination, and a storage module v for storing information.
The metering unit II and the communication unit III are connected with the control unit VI, the display module I and the storage module V are respectively connected with the control unit VI, and the power supply unit IV supplies power to the whole electric energy meter checking device.
The display module I comprises an LCD display screen arranged on the shell.
The metering unit II comprises a current module, a voltage module, a metering module and a clock module for timing, wherein the current module converts user load into measurable current through a current coil and transmits the measurable current to the metering module for metering, the voltage module measures user voltage and transmits the user voltage to the metering module for metering, and the metering module receives information transmitted by the current module and the voltage module, sets a metering formula for temperature compensation, user power consumption and electric energy used by a user, checks the electric energy meter of the user, calculates errors and provides reference for equipment operation and maintenance personnel.
The communication unit III comprises a communication interface 302, an infrared switch 34 and an infrared sampling loop which are arranged on the shell, and when infrared wireless connection is used, the infrared sampling loop is opened to be connected with the infrared switch 34 to realize wireless communication connection with the control unit; the communication interface 302 is connected with the communication interface of the tested electric energy meter to realize wired communication connection with the control unit, and the information of the tested electric energy meter is uploaded to the rapid electric energy meter calibration device 3 in real time.
And the power supply unit IV comprises a power supply management module and a standby battery, the power supply management module converts commercial power into power supply required by the interior of the electric energy meter and supplies power to each unit of the electric energy meter calibration device, and meanwhile, the standby battery is charged.
And the control unit VI comprises an MCU singlechip. The front surface of the shell is provided with an infrared switch 34, an operating key, an indicator light 36, a wiring terminal 301 and a communication interface 302, wherein the operating key comprises a function key 35, a start key 37, a precision adjusting key 38 and a storage key 39.
When the rapid electric energy meter calibration device provided by the embodiment is used for calibrating an electric energy meter, the rapid electric energy meter calibration device 3 is connected with the measured electric energy meter through the test resistor 5, the wiring schematic diagram is shown in fig. 5, and the method comprises the following steps:
s1, according to analysis or report by people, a suspected electricity stealing user is found, operation and maintenance personnel inform the user to perform power failure check on site, the electric meter box 1 is opened, whether the lead seal of the electric energy meter 2 is moved or not and whether the meter of the electric energy meter 2 is normal or not are preliminarily checked, the user switch 4 is pulled open, and the user wiring is removed;
s2, connecting the 2 and 4 terminals of the terminal 301 of the quick electric energy meter calibration device 3 with the two ends of the test resistor 5, respectively, connecting the 1 and 3 terminals of the terminal 301 of the quick electric energy meter calibration device 3 with the 2 and 4 terminals of the user tested electric energy meter 6 through the user switch to form a primary loop, and measuring the U of the electric energy meter through the voltage module and the current module of the measuring part IIMeasuringAnd IMeasuringAnd calculate P thereofMeasuringAnd electric energy WMeasuring；
S3, connecting the communication loop through the communication interface 302 of the quick electric energy meter calibration device and the communication interface of the user tested electric energy meter by using a communication line;
s4, closing the user switch 4;
s5, pressing a meter calibrating device start button 37, uploading the data of the tested electric energy meter to a quick electric energy meter calibrating device in real time through a communication line, displaying the red light as a green light by an indicator light 36 after the data communication is normal, starting calibration, and setting a voltage error calculation formula in a metering unit of the quick electric energy meter calibrating device
Equation of current error calculation
Equation of power error calculation
Calculation formula of electric energy error
Performing a calculation of where UStandard of merit、IStandard of merit、PStandard of meritAnd WStandard of meritFor the measured values of the fast calibration device, UMeasuring、IMeasuring、PMeasuringAnd WMeasuringThe measured value of the electric energy meter to be measured is obtained;
s6, displaying the verification result and the error through the display screen 33, and performing page turning operation through the function key 35 to display different data;
s7, storing the verification data by pressing the storage key 39;
and S8, after the verification is finished, closing the user switch 4, detaching the test wire and the communication wire, restoring the user electric energy meter to be normal, and if a problem is found, detaching the electric energy meter for further verification and processing according to the regulations.
In this embodiment, the communication interface 302 is connected with the 485 communication interface of the measured electric energy meter by using a 485 communication line, so as to realize wired communication connection, and information of the measured electric energy meter is uploaded to the rapid electric energy meter calibration device 3 in real time for error calculation. In addition, the test resistor 5 used in the verification of the present embodiment is an external resistor.
Example 2
The fast electric energy meter calibration device described in this embodiment is an improvement on the basis of embodiment 1, and is different from embodiment 1 in that: the quick electric energy meter calibration device 3 is in infrared communication with the tested electric energy meter, each electric energy meter has respective communication address, generally, the communication addresses are several digits behind a bar code of the electric energy meter, wireless communication is realized through an infrared sampling loop of the tested electric energy meter, and the communication address of the electric energy meter is input by selecting which tested electric energy meter is connected with the calibration device. In addition, in this embodiment, the test resistor 5 is an external resistor during verification, as shown in fig. 3, the infrared switch 34 of the fast electric energy meter calibration device 3 is pressed, the fast electric energy meter calibration device 3 emits an infrared signal, the electric energy meter receives the signal through the infrared sampling loop and the infrared communication interface, then signal matching is performed, a corresponding electric energy meter is selected for signal matching according to a communication address marked on a bar code of the electric energy meter, after the signal matching is successful, the indicator light 36 is changed into a green light to indicate that the signal is switched on, and the steps of performing verification on the electric energy meter by using the fast electric energy meter calibration device provided in this embodiment are the same as those of embodiment 1.
Example 3
Referring to fig. 6, the fast electric energy meter calibration apparatus described in this embodiment is an improvement on the basis of embodiment 1, and is different from embodiment 1 in that: the test resistance 5 of the rapid electric energy meter calibration device 3 is built-in, the test resistance 5 is a variable resistance, a relay is added between the MCU singlechip and the test resistance, and resistance value switching is carried out by pressing the precision button 38 of the panel of the rapid electric energy meter calibration device, so that one more test point can be added, the test result is more accurate, and the steps of using the rapid electric energy meter calibration device provided by the embodiment to calibrate the electric energy meter are the same as those of the embodiment 1.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. A quick electric energy meter calibration device comprises a shell and is characterized by further comprising a display module I used for displaying a voltage error, a current error, a power error and a metering error of an electric energy meter measured by the calibration device, a metering unit II used for converting a user load into a measurable current through a current coil and metering, a communication unit III used for communication connection and information uploading, a power supply unit IV used for converting commercial power into a power supply required by the interior of the electric energy meter and charging a standby battery, a control unit VI used for control and coordination, and a storage module V used for storing information;
the metering unit II and the communication unit III are connected with the control unit VI, the display module I and the storage module V are respectively connected with the control unit VI, and the power supply unit IV supplies power to the whole electric energy meter checking device.
2. The rapid electric energy meter verification device according to claim 1, wherein the display module i comprises an LCD display screen (33) disposed on the housing.
3. The device for checking the electric energy meter quickly as claimed in claim 2, wherein the metering unit II comprises a current module, a voltage module, a metering module and a clock module for timing, the current module converts the user load into a measurable current through a current coil and transmits the measurable current to the metering module for metering, the voltage module measures the user voltage and transmits the user voltage to the metering module for metering, and the metering module receives information transmitted by the current module and the voltage module, sets a metering formula for temperature compensation, user power consumption and electric energy used by the user, checks the electric energy meter of the user, and calculates an error for reference of equipment operation and maintenance personnel.
4. The quick electric energy meter calibration device according to claim 3, wherein the communication unit III comprises a communication interface (302), an infrared switch (34) and an infrared sampling loop, the communication interface, the infrared switch (34) and the infrared sampling loop are arranged on the shell, and the infrared sampling loop is connected with the infrared switch (34) to realize wireless communication connection with the control unit; the communication interface (302) is connected with the communication interface of the tested electric energy meter to realize wired communication connection with the control unit, and information of the tested electric energy meter is uploaded to the quick electric energy meter calibration device (3) in real time.
5. The rapid electric energy meter verification device according to claim 4, wherein the power supply unit IV comprises a power supply management module and a backup battery, the power supply management module converts commercial power into power supply required by the interior of the electric energy meter and supplies power to each unit of the electric energy meter verification device, and the backup battery is charged at the same time.
6. The quick electric energy meter calibration device according to claim 5, wherein the control unit VI comprises an MCU singlechip.
7. The quick electric energy meter checking device according to claim 1, wherein an infrared switch (34), an operation key, an indicator light (36), a wiring terminal (301) and a communication interface (302) are arranged on the front face of the casing, and the operation key comprises a function key (35), a start key (37), a precision adjusting key (38) and a storage key (39).
8. Use method of a rapid electric energy meter calibration device according to any of the preceding claims, characterized in that the rapid electric energy meter calibration device is connected with the electric energy meter to be tested through a test resistor (5), comprising the following steps:
s1, according to analysis or report by people, a suspected electricity stealing user is found, operation and maintenance personnel inform the user to perform power failure check on site, the electric meter box (1) is opened, whether the lead seal of the electric energy meter (2) is moved or not is preliminarily checked, whether the meter of the electric energy meter (2) is normal or not is preliminarily checked, the user switch (4) is pulled open, and the user wiring is removed;
s2, two terminals of a wiring terminal (301) of the rapid electric energy meter calibration device (3) are respectively connected with two ends of a test resistor (5), and the other two terminals of the wiring terminal (301) of the rapid electric energy meter calibration device (3) are respectively connected with a wiring terminal of a user tested electric energy meter (6) through a user switch to form a primary loop;
s3, connecting a communication loop through a communication line between the communication interface (302) of the rapid electric energy meter calibration device (3) and the communication interface of the user tested electric energy meter (6);
s4, closing the user switch (4);
s5, pressing a meter calibration device start button (37), uploading the data of the electric energy meter to be tested to the quick electric energy meter calibration device in real time through a communication line, displaying the red light of the indicator light (36) as the green light after the data communication is normal, and starting calibration;
s6, displaying the verification result and the error through a display screen (33), and performing page turning operation through a function key (35) to display different data;
s7, storing the check data by pressing a storage key (39);
and S8, after the verification is finished, closing the user switch (4), detaching the test wire and the communication wire, restoring the user electric energy meter to be normal, and if a problem is found, detaching the electric energy meter for further verification and processing according to the regulations.
9. The method for using the rapid electric energy meter calibration device according to claim 8, wherein in the step S5, the voltage error calculation formula in the metering unit of the rapid electric energy meter calibration device (3) is set
Equation of current error calculation
Equation of power error calculation
Calculation formula of electric energy error
And (6) performing calculation.
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| CN202010131771.XA CN111175689A (en) | 2020-02-29 | 2020-02-29 | Quick electric energy meter calibration device and use method |
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| CN202010131771.XA CN111175689A (en) | 2020-02-29 | 2020-02-29 | Quick electric energy meter calibration device and use method |
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| CN202010131771.XA Pending CN111175689A (en) | 2020-02-29 | 2020-02-29 | Quick electric energy meter calibration device and use method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112147567A (en) * | 2020-09-28 | 2020-12-29 | 宁夏隆基宁光仪表股份有限公司 | Intelligent ammeter with self-checking function and ammeter checking method |
| CN113406557A (en) * | 2021-06-23 | 2021-09-17 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Remote verification method for propagation type charging pile |
| CN114089266A (en) * | 2022-01-21 | 2022-02-25 | 杭州炬华科技股份有限公司 | Meter calibration method and system suitable for single-phase double-loop electric energy meter |
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| CN103675752A (en) * | 2012-11-30 | 2014-03-26 | 国网电力科学研究院 | Electric energy meter rapid detection device and method thereof |
| CN203825180U (en) * | 2013-12-24 | 2014-09-10 | 国家电网公司 | Electric energy meter quick-calibrating device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112147567A (en) * | 2020-09-28 | 2020-12-29 | 宁夏隆基宁光仪表股份有限公司 | Intelligent ammeter with self-checking function and ammeter checking method |
| CN113406557A (en) * | 2021-06-23 | 2021-09-17 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Remote verification method for propagation type charging pile |
| CN114089266A (en) * | 2022-01-21 | 2022-02-25 | 杭州炬华科技股份有限公司 | Meter calibration method and system suitable for single-phase double-loop electric energy meter |
| CN114089266B (en) * | 2022-01-21 | 2022-05-20 | 杭州炬华科技股份有限公司 | Meter calibration method and system suitable for single-phase double-loop electric energy meter |
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Application publication date: 20200519 |