CN113138362A - Calibration method for automatically compensating electric energy metering error of electric energy meter - Google Patents
Calibration method for automatically compensating electric energy metering error of electric energy meter Download PDFInfo
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Abstract
The invention discloses a calibration method for automatically compensating electric energy metering errors of an electric energy meter, which relates to the technical field of electric energy meters, comprises a detection device and a calibration method, and is characterized in that: the detection device comprises a processor, a load circuit regulator, a voltage signal receiving module, a current signal receiving module, an A/D conversion module, a temperature sensor, a humidity sensor, an air pressure sensor, a magnetic field inductor, a timer and a calibration output module, wherein the processor comprises an information processing unit, an RS485 communication port and a storage; the calibration method comprises the steps of electric energy meter calibration and electric energy meter compensation. According to the method, the electric energy metering errors of the electric energy meter under different environmental conditions can be calculated and stored, and then the electric energy value generated by the electric energy metering errors is compensated to the electric energy meter according to the real-time use process, so that the fairness problem of charging for electric quantity use by the environment is reduced.
Description
Technical Field
The invention relates to the technical field of electric energy meters, in particular to a calibration method for automatically compensating electric energy metering errors of an electric energy meter.
Background
The electric energy meter is an instrument for measuring electric energy, also called watt-hour meter, fire meter, kilowatt hour meter, it refers to an instrument for measuring various electric quantities, with the rapid development of Chinese economy, the demand of each industry for electricity is more and more big, the phenomenon of unbalanced electricity consumption in different time is more and more serious, in order to relieve the increasingly sharp contradiction between power supply and demand in China, regulate load curve, improve the phenomenon of unbalanced electricity consumption, fully implement peak, flat and valley time-sharing rate system, "load shifting" to improve national electricity utilization efficiency, reasonably utilize electric power resources, and some domestic provincial electric power departments have gradually introduced multi-rate electric energy meters to time-share charge the electricity consumption of users. However, the electric energy metering error of the electric energy meter is influenced by a plurality of factors, the temperature change is the primary factor influencing the metering error of the electric energy meter, the loaded voltage in the electric energy meter is unequal to the voltage of an outer line and an inner line, so that the change proportion of a rotating pulley in the electric energy meter is different, the metering of the electric energy meter is not accurate, errors caused by different voltages are formed, and similarly, the current loaded in the electric energy meter is different from the current of the outer line and the inner line, a certain deviation exists, the degree of the electric energy meter is completely different from the actual power consumption, and errors are formed; meanwhile, the electric energy meter is limited by cost, and the humidity resistance, the pressure resistance and the magnetic field resistance of the electric components of the electric energy meter are not too strong, so that the electric energy meter is easily influenced by the humidity, the pressure and the magnetic field of a working environment in the use process, and working errors are caused.
Due to the existence of the electric energy metering error of the electric energy meter, the temperature rise of the electric energy meter with large electricity consumption is high, and the error influences the determination of the electricity use at the moment, so that the fairness problem of electricity use and charge is caused; meanwhile, the current electric energy meter is complex in use environment and may be installed in various humid and high-altitude places or places with magnetic field interference, so that the electric energy meter is disordered in work and normal work and charging are affected.
Disclosure of Invention
The invention aims to provide a calibration method for automatically compensating the electric energy metering error of an electric energy meter so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the calibration method for automatically compensating the electric energy metering error of the electric energy meter comprises a detection device and a calibration method, and is characterized in that: the detection device comprises a processor, a load circuit regulator, a voltage signal receiving module, a current signal receiving module, an A/D conversion module, a temperature sensor, a humidity sensor, an air pressure sensor, a magnetic field inductor, a timer and a calibration output module, wherein the processor comprises an information processing unit, an RS485 communication port and a storage;
the calibration method comprises the steps of electric energy meter calibration and electric energy meter compensation.
As a further scheme of the invention: the output of load circuit regulator is connected with the input of treater, voltage signal receiving module and current signal receiving module's output and AD conversion module's input are all connected, AD conversion module's output is connected with the input of treater, temperature sensor, humidity transducer, baroceptor, magnetic field inductor's output and the input of treater are connected, the output of time-recorder is connected with the input of treater, the output of treater is connected with calibration output module's input, calibration output module's output is connected with the display screen of electric energy meter.
As a still further scheme of the invention: load circuit regulator is used for adjusting the load circuit real-time power of being connected with the electric energy meter, voltage signal receiving module is used for measuring load circuit's voltage, current signal receiving module is used for measuring the electric current that the electric energy meter flowed through, temperature sensor, humidity transducer, baroceptor, magnetic field inductor are used for measuring real-time temperature, ambient humidity, ambient atmospheric pressure, the environmental magnetic field signal intensity of electric energy meter, the time-recorder is used for the record time, RS485 communication port is used for providing the real-time power supply condition of power plant.
As a still further scheme of the invention: the calibration of the electric energy meter specifically comprises the following steps:
step (1): firstly, a load circuit regulator is connected with a load circuit in parallel, then a voltage signal receiving module is connected with the load circuit in parallel, then a current signal receiving module is connected with the load circuit in series, and then a calibration output module is connected with a display screen of the electric energy meter;
step (2): the real-time power of the load circuit is gradually increased through the load circuit regulator, the voltage and the current are monitored by the voltage signal receiving module and the current signal receiving module in real time through the A/D conversion module, and are transmitted to the processor through analog signals, and the real-time temperature, the humidity, the environmental air pressure and the environmental magnetic field signal intensity of the electric energy meter are transmitted to the processor through the temperature sensor, the humidity sensor, the air pressure sensor and the magnetic field sensor respectively;
and (3): the RS485 communication port receives the real-time power supply power of the power plant, the metering errors of the electric energy meter are calculated through the information processing unit, the metering errors of the electric energy meter under different temperatures, different humidities, different air pressures and different magnetic field signal strengths are stored in the storage device, and then the calibration of the electric energy meter can be completed.
As a still further scheme of the invention: the electric energy meter compensation specifically comprises the following steps:
the method comprises the following steps: connecting the calibrated electric energy meter with a household load circuit;
step two: the processor receives the ambient temperature, the ambient humidity, the ambient air pressure and the ambient magnetic field signal intensity detected by the temperature sensor, the humidity sensor, the air pressure sensor and the magnetic field sensor, the RS485 communication port receives the power supply power of the power plant, and the information processing unit carries out statistics on the metering error value according to the electric energy meter metering error stored in the storage under the corresponding temperature, humidity, air pressure and magnetic field signal intensity and the time recorded by the timer under the corresponding temperature, humidity, air pressure and magnetic field intensity;
step three: the calibration output module transmits the metering error compensation value to the electric energy meter, and the electric energy meter can be compensated through a display screen of the electric energy meter.
As a still further scheme of the invention: the voltmeter used by the voltage signal receiving module in the step (1) is an alternating current voltmeter, and the ammeter used by the current signal receiving module in the step (1) is an alternating current ammeter.
As a still further scheme of the invention: and the RS485 communication port in the step (3) and the step (II) is connected with the power plant by adopting a wireless receiver.
As a still further scheme of the invention: the calibration output module in the third step transmits the metering error compensation value to the electric energy meter, and the compensation of the electric energy meter through the display screen of the electric energy meter is specifically as follows: s1, continuously monitoring the strength of the magnetic field signal by the magnetic field inductor, and acquiring the power value of the electric energy meter; s2, the processor collects the intensity and power value of the magnetic field signal obtained in the step S1 according to a first time period, judges whether the collected intensity of the magnetic field signal exceeds a set first threshold value, and if the collected intensity of the magnetic field signal does not exceed the set first threshold value, the processor continues to collect the magnetic field signal; if the collected magnetic field signal exceeds a set first threshold value, judging the magnetic field signal to be an over-strong magnetic field signal, setting the collected power value to be over-high power, and then jumping to the next step; s3, the processor judges whether the change rate between the overhigh power and the power value collected last time exceeds a set second threshold value, if not, the processor returns to the step S2 to continue collecting; if the power exceeds the second threshold, setting the overhigh power as a non-overhigh power value acquired at the previous time; and S4, transmitting the non-excessive power value as a compensation value to the electric energy meter, so that the display screen of the electric energy meter compensates the electric energy meter through the non-excessive power value.
As a still further scheme of the invention: the real-time monitoring voltage in the step (1) is UtThe real-time monitoring current in the step (1) is ItReal-time power of the domestic load circuit is Pt,Pt＝UtItThe real-time power supply power of the power plant in the step (3) is PGtThe metering error of the electric energy meter in the step (3) is
As a still further scheme of the invention: the compensation value in the third step is Wt，Wt＝PGtσtt, the total compensation value of the electric energy meter corresponding to different temperatures is W, and W is equal to PG1σ1t1+PG2σ2t2+…+PGnσntnI.e. by
Compared with the prior art, the invention has the beneficial effects that: the method can calculate and store the electric energy metering errors of the electric energy meter at different temperatures, and then compensate the electric energy value generated by the electric energy metering errors to the electric energy meter according to the real-time use process, so that the fairness problem of charging for electric quantity use by temperature is reduced.
Drawings
FIG. 1 is a system block diagram of a calibration method for automatically compensating for an electric energy metering error of an electric energy meter.
Fig. 2 is a flow chart of a calibration method for automatically compensating for an electric energy metering error of an electric energy meter.
FIG. 3 is a flowchart of the steps of calibration of the electric energy meter in the calibration method for automatically compensating the electric energy metering error of the electric energy meter.
FIG. 4 is a flowchart illustrating steps of electric energy meter compensation in a calibration method for automatically compensating for an electric energy metering error of an electric energy meter.
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.
In some embodiments of the invention, the calibration method for automatically compensating the electric energy metering error of the electric energy meter comprises a processor, a load circuit regulator, a voltage signal receiving module, a current signal receiving module, an a/D conversion module, a temperature sensor, a humidity sensor, an air pressure sensor, a magnetic field sensor, a timer and a calibration output module, wherein the processor comprises an information processing unit, an RS485 communication port and a memory, an output end of the load circuit regulator is connected with an input end of the processor, output ends of the voltage signal receiving module and the current signal receiving module are both connected with an input end of the a/D conversion module, an output end of the a/D conversion module is connected with an input end of the processor, output ends of the temperature sensor, the humidity sensor, the air pressure sensor and the magnetic field sensor are connected with an input end of the processor, the output of time-recorder is connected with the input of treater, the output of treater is connected with calibration output module's input, calibration output module's output is connected with the display screen of electric energy meter, load circuit regulator is used for adjusting the load circuit real-time power of being connected with the electric energy meter, voltage signal receiving module is used for measuring load circuit's voltage, current signal receiving module is used for measuring the electric current that the electric energy meter flows through, a weighing sensor and a temperature sensor, humidity transducer, baroceptor, magnetic field inductor is used for measuring the real-time temperature of electric energy meter, ambient humidity, ambient pressure, ambient magnetic field signal intensity, the time-recorder is used for the record time, RS485 communication port is used for providing the real-time power supply condition of power plant.
Conveniently adjusting the power of the load circuit by a load circuit adjuster to adjust the current flowing through the energy meter to adjust the temperature of the energy meter; the real-time voltage value and the current value are conveniently and rapidly monitored through the A/D conversion module, the voltage signal receiving module and the current signal receiving module; through treater, information processing unit, RS485 communication port, accumulator, temperature sensor, humidity transducer, baroceptor, magnetic field inductor and time-recorder, both can conveniently calibrate electric energy meter metering error under the different environmental conditions fast, can compensate the calibration according to real-time environmental condition electric energy meter metering error in the use again.
In some embodiments of the invention, the calibration method includes power meter calibration and power meter compensation
The calibration of the electric energy meter specifically comprises the following steps:
step (1): firstly, a load circuit regulator is connected with a load circuit in parallel, then a voltage signal receiving module is connected with the load circuit in parallel, then a current signal receiving module is connected with the load circuit in series, and then a calibration output module is connected with a display screen of the electric energy meter;
step (2): the real-time power of the load circuit is gradually increased through the load circuit regulator, the voltage and the current are monitored by the voltage signal receiving module and the current signal receiving module in real time through the A/D conversion module, and are transmitted to the processor through analog signals, and the real-time temperature, the humidity, the environmental air pressure and the environmental magnetic field signal intensity of the electric energy meter are transmitted to the processor through the temperature sensor, the humidity sensor, the air pressure sensor and the magnetic field sensor respectively;
and (3): the RS485 communication port receives the real-time power supply power of the power plant, the metering errors of the electric energy meter are calculated through the information processing unit, the metering errors of the electric energy meter under different temperatures, different humidities, different air pressures and different magnetic field signal strengths are stored in the storage device, and then the calibration of the electric energy meter can be completed.
The electric energy meter compensation specifically comprises the following steps:
the method comprises the following steps: connecting the calibrated electric energy meter with a household load circuit;
step two: the processor receives the ambient temperature, the ambient humidity, the ambient air pressure and the ambient magnetic field signal intensity detected by the temperature sensor, the humidity sensor, the air pressure sensor and the magnetic field sensor, the RS485 communication port receives the power supply power of the power plant, and the information processing unit carries out statistics on the metering error value according to the electric energy meter metering error stored in the storage under the corresponding temperature, humidity, air pressure and magnetic field signal intensity and the time recorded by the timer under the corresponding temperature, humidity, air pressure and magnetic field intensity;
step three: the calibration output module transmits the metering error compensation value to the electric energy meter, and the electric energy meter can be compensated through a display screen of the electric energy meter.
The voltmeter used by the voltage signal receiving module in the step (1) is an alternating current voltmeter (the model of the alternating current voltmeter is HKS-AC-V01, and the manufacturer of the alternating current voltmeter is Jinmili trade company, Guangzhou), the ammeter used by the current signal receiving module in the step (1) is an alternating current ammeter (the model of the alternating current ammeter is AD16-22AMS, and the manufacturer of the alternating current ammeter is Leqingyunshui electric company, the RS485 communication port in the step (3) and the step (II) is connected with the power plant by adopting a wireless receiver, and the household load circuit in the step (I) is an electric device connected with the electric energy meter.
The calibration output module in the third step transmits the metering error compensation value to the electric energy meter, and the compensation of the electric energy meter through the display screen of the electric energy meter is specifically as follows: s1, continuously monitoring the strength of the magnetic field signal by the magnetic field inductor, and acquiring the power value of the electric energy meter; s2, the processor collects the intensity and power value of the magnetic field signal obtained in the step S1 according to a first time period, judges whether the collected intensity of the magnetic field signal exceeds a set first threshold value, and if the collected intensity of the magnetic field signal does not exceed the set first threshold value, the processor continues to collect the magnetic field signal; if the collected magnetic field signal exceeds a set first threshold value, judging the magnetic field signal to be an over-strong magnetic field signal, setting the collected power value to be over-high power, and then jumping to the next step; s3, the processor judges whether the change rate between the overhigh power and the power value collected last time exceeds a set second threshold value, if not, the processor returns to the step S2 to continue collecting; if the power exceeds the second threshold, setting the overhigh power as a non-overhigh power value acquired at the previous time; and S4, transmitting the non-excessive power value as a compensation value to the electric energy meter, so that the display screen of the electric energy meter compensates the electric energy meter through the non-excessive power value.
Monitoring the voltage in step (1) to be U in real timetThe real-time monitoring current in the step (1) is ItReal-time power of the domestic load circuit is Pt,Pt＝UtItAnd (4) the real-time power supply power of the power plant in the step (3) is PGtThe metering error of the electric energy meter in the step (3) is
The compensation value in step three is Wt，Wt＝PGtσtt, the total compensation value of the electric energy meter corresponding to different temperatures is W, and W is equal to PG1σ1t1+PG2σ2t2+…+PGnσntnI.e. by
The method comprises the steps of calibrating the electric energy meter, detecting and storing the metering error of the electric energy meter under different environmental conditions, and compensating the metering error of the electric energy meter under different environmental conditions in different time periods in the using process through the step of compensating the electric energy meter.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The calibration method for automatically compensating the electric energy metering error of the electric energy meter comprises a detection device and a calibration method, and is characterized in that: the detection device comprises a processor, a load circuit regulator, a voltage signal receiving module, a current signal receiving module, an A/D conversion module, a temperature sensor, a humidity sensor, an air pressure sensor, a magnetic field inductor, a timer and a calibration output module, wherein the processor comprises an information processing unit, an RS485 communication port and a storage;
the calibration method comprises the steps of electric energy meter calibration and electric energy meter compensation.
2. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 1, is characterized in that: the output of load circuit regulator is connected with the input of treater, voltage signal receiving module and current signal receiving module's output and AD conversion module's input are all connected, AD conversion module's output is connected with the input of treater, temperature sensor, humidity transducer, baroceptor, magnetic field inductor's output is connected with the input of treater respectively, the output of time-recorder is connected with the input of treater, the output of treater is connected with calibration output module's input, calibration output module's output is connected with the display screen of electric energy meter.
3. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 1, is characterized in that: load circuit regulator is used for adjusting the load circuit real-time power of being connected with the electric energy meter, voltage signal receiving module is used for measuring load circuit's voltage, current signal receiving module is used for measuring the electric current that the electric energy meter flowed through, temperature sensor, humidity transducer, baroceptor, magnetic field inductor are used for measuring real-time temperature, ambient humidity, ambient atmospheric pressure, the environmental magnetic field signal intensity of electric energy meter respectively, the time-recorder is used for the record time, RS485 communication port is used for providing the real-time power supply condition of power plant.
4. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 1, is characterized in that: the calibration of the electric energy meter specifically comprises the following steps:
step (1): firstly, a load circuit regulator is connected with a load circuit in parallel, then a voltage signal receiving module is connected with the load circuit in parallel, then a current signal receiving module is connected with the load circuit in series, and then a calibration output module is connected with a display screen of the electric energy meter;
step (2): the real-time power of the load circuit is gradually increased through the load circuit regulator, the voltage and the current are monitored by the voltage signal receiving module and the current signal receiving module in real time through the A/D conversion module, and are transmitted to the processor through analog signals, and the real-time temperature, the humidity, the environmental air pressure and the environmental magnetic field signal intensity of the electric energy meter are transmitted to the processor through the temperature sensor, the humidity sensor, the air pressure sensor and the magnetic field sensor respectively;
and (3): the RS485 communication port receives the real-time power supply power of the power plant, the metering errors of the electric energy meter are calculated through the information processing unit, the metering errors of the electric energy meter under different temperatures, different humidities, different air pressures and different magnetic field signal strengths are stored in the storage device, and then the calibration of the electric energy meter can be completed.
5. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 1, is characterized in that: the electric energy meter compensation specifically comprises the following steps:
the method comprises the following steps: connecting the calibrated electric energy meter with a household load circuit;
step two: the processor receives the ambient temperature, the ambient humidity, the ambient air pressure and the ambient magnetic field signal intensity detected by the temperature sensor, the humidity sensor, the air pressure sensor and the magnetic field sensor, the RS485 communication port receives the power supply power of the power plant, and the information processing unit carries out statistics on the metering error value according to the electric energy meter metering error stored in the storage under the corresponding temperature, humidity, air pressure and magnetic field signal intensity and the time recorded by the timer under the corresponding temperature, humidity, air pressure and magnetic field intensity;
step three: the calibration output module transmits the metering error compensation value to the electric energy meter, and the electric energy meter can be compensated through a display screen of the electric energy meter.
6. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 4, is characterized in that: the voltmeter used by the voltage signal receiving module in the step (1) is an alternating current voltmeter, and the ammeter used by the current signal receiving module in the step (1) is an alternating current ammeter.
7. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 4 or 5, is characterized in that: and the RS485 communication port in the step (3) and the step (II) is connected with the power plant by adopting a wireless receiver.
8. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 5, is characterized in that: the calibration output module in the third step transmits the metering error compensation value to the electric energy meter, and the compensation of the electric energy meter through the display screen of the electric energy meter is specifically as follows: s1, continuously monitoring the strength of the magnetic field signal by the magnetic field inductor, and acquiring the power value of the electric energy meter; s2, the processor collects the intensity and power value of the magnetic field signal obtained in the step S1 according to a first time period, judges whether the collected intensity of the magnetic field signal exceeds a set first threshold value, and if the collected intensity of the magnetic field signal does not exceed the set first threshold value, the processor continues to collect the magnetic field signal; if the collected magnetic field signal exceeds a set first threshold value, judging the magnetic field signal to be an over-strong magnetic field signal, setting the collected power value to be over-high power, and then jumping to the next step; s3, the processor judges whether the change rate between the overhigh power and the power value collected last time exceeds a set second threshold value, if not, the processor returns to the step S2 to continue collecting; if the power exceeds the second threshold, setting the overhigh power as a non-overhigh power value acquired at the previous time; and S4, transmitting the non-excessive power value as a compensation value to the electric energy meter, so that the display screen of the electric energy meter compensates the electric energy meter through the non-excessive power value.
9. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 4, is characterized in that: in the step (1)Real-time monitoring voltage of UtThe real-time monitoring current in the step (1) is ItReal-time power of the domestic load circuit is Pt,Pt＝UtItThe real-time power supply power of the power plant in the step (3) is PGtThe metering error of the electric energy meter in the step (3) is
10. The calibration method for automatically compensating the electric energy metering error of the electric energy meter according to claim 5, is characterized in that: the compensation value in the third step is Wt，Wt＝PGtσtt, the total compensation value of the electric energy meter corresponding to different temperatures is W, and W is equal to PG1σ1t1+PG2σ2t2+…+PGnσntnI.e. by
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| CN116223903A (en) * | 2023-05-06 | 2023-06-06 | 烟台东方威思顿电气有限公司 | Anti-interference circuit and method for three-phase three-wire electric energy meter under alternating current magnetic field |
| CN116754830A (en) * | 2023-06-13 | 2023-09-15 | 武汉阿迪克电子股份有限公司 | Metering method and device of electric energy meter and storage medium |
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