CN112068068A - Error out-of-tolerance automatic detection system for electric energy meter in transformer area - Google Patents
Error out-of-tolerance automatic detection system for electric energy meter in transformer area Download PDFInfo
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- CN112068068A CN112068068A CN202011040185.0A CN202011040185A CN112068068A CN 112068068 A CN112068068 A CN 112068068A CN 202011040185 A CN202011040185 A CN 202011040185A CN 112068068 A CN112068068 A CN 112068068A
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 42
- 238000005070 sampling Methods 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 238000007689 inspection Methods 0.000 claims abstract description 8
- 230000005284 excitation Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000896 Manganin Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Abstract
The invention relates to the technical field of power detection, in particular to an automatic error over-tolerance detection system for a distribution room electric energy meter, which comprises a single-phase intelligent electric energy meter and a concentrator, wherein the single-phase intelligent electric energy meter comprises a metering core module, a management core module, a communication module and an extended function module, the metering core module comprises a live wire channel sampling unit, a zero line channel sampling unit and a voltage sampling unit, the communication module comprises three modes of infrared communication, RS485 communication and carrier communication, and the extended function module comprises a real-time monitoring module, a monitoring alarm module and an annual inspection module; the real-time monitoring module is connected with the monitoring alarm module. The invention not only can enable the electric energy meter to detect the metering error deviation of the metering channel of the electric energy meter and accurately position the electric energy meter to a single meter to prevent the electric energy meter with unqualified error from being continuously used on line, but also can effectively monitor the service condition of the electric energy meter and reduce the rotation cost of the electric energy meter.
Description
Technical Field
The invention relates to the technical field of electric power detection, in particular to an automatic detection system for error out-of-tolerance of a power meter in a transformer area.
Background
With the rapid development of economy in China, the demand of various industries on electricity is increasingly greater, and the phenomenon of unbalanced electricity consumption at different times is increasingly serious. In order to relieve the increasingly sharp power supply and demand contradiction in China, adjust load curves, improve the phenomenon of unbalanced power consumption, comprehensively implement a peak, flat and valley time-sharing power price system, "load shifting" to improve the national power utilization efficiency and reasonably utilize power resources, a part of domestic provincial and municipal power departments have started to gradually provide multi-rate electric energy meters to charge the power consumption of users in a time-sharing manner.
The electric energy meter is single-phase residential user power consumption measurement, the end equipment of state perception, generally installs in residential user's block terminal. After long-time use, some functions on the electric energy meter can reflect less than enough gradually, can cause the error of measurement, and these errors can not in time be found to be so that this electric energy meter is still being used for a long time in the later stage, and then cause the increase in user's economy, can endanger the life even, in addition, in the period of taking turns to the electric energy meter, all be regional concentrated change of large tracts of land usually, so that cause the burden on the cost. Therefore, we propose an automatic error over-tolerance detection system for a power meter in a transformer area to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an automatic detection system for the error out-of-tolerance of a transformer area electric energy meter.
An automatic error out-of-tolerance detection system for a distribution room electric energy meter comprises a single-phase intelligent electric energy meter and a concentrator, wherein the single-phase intelligent electric energy meter comprises a metering core module, a management core module, a communication module and an expansion function module, the metering core module comprises a live wire channel sampling unit, a zero line channel sampling unit and a voltage sampling unit, the communication module comprises three modes of infrared communication, RS485 communication and carrier communication, and the expansion function module comprises a real-time monitoring module, a monitoring alarm module and an annual inspection module;
be connected between real-time supervision module and the monitoring alarm module, and real-time supervision module also is connected through pulse signal with measurement core module, monitoring alarm module output connection to single-phase intelligent ammeter, annual inspection module is through timer output connection to single-phase intelligent ammeter, single-phase intelligent ammeter is connected with communication module behind the singlechip, communication module connects mutually through agreement data and concentrator, and single-phase intelligent ammeter and singlechip all are connected with power module.
Preferably, the lower limit of the error trigger set by the single-phase intelligent electric energy meter is 200% ± 3%.
Preferably, the set determination delay time of the single-phase intelligent electric energy meter is 60s +/-2 s.
Preferably, the rate set values of the RS485 communication are 1200bps, 2400bps, 4800bps and 9600bps, and the default value is 2400 bps.
Preferably, the angle θ of the infrared communication is: when the sensor is positioned right above, on the left side and on the right side of the central axis, | theta | > is not less than 30 degrees, and when the sensor is positioned right below the central axis, | theta | > is not less than 45 degrees, and the communication baud rate is 1200 bps.
Preferably, the communication baud rate between the single-phase intelligent electric energy meter and the carrier communication is 2400 bps.
Preferably, when the sampling signal of the voltage sampling unit or the live wire channel sampling unit changes, the excitation signal is input to the signal input end thereof, the excitation signal is detected at the signal detection end, and the error change condition is determined through the signal attenuation condition.
The invention has the beneficial effects that:
1. the electric energy meter can detect the metering error deviation of the metering channel of the electric energy meter, and accurately positions the electric energy meter to a single meter to prevent the electric energy meter with unqualified error from being continuously used on line.
2. The invention can collect and manage the data of the running error deviation of the electric energy meter, can effectively monitor the use condition of the electric energy meter and reduce the rotation cost of the electric energy meter.
Drawings
FIG. 1 is a block diagram of a system for automatically detecting the error out-of-tolerance of a power meter in a distribution room;
FIG. 2 is a block diagram of a monitoring system of an automatic error over-tolerance detection system for a distribution room electric energy meter, which is provided by the invention;
FIG. 3 is a schematic diagram of error change detection of a manganin shunt when a sampling signal of a live wire channel is changed by the automatic error over-tolerance detection system for the electric energy meter in the transformer area provided by the invention;
fig. 4 is a schematic diagram illustrating error change detection of a voltage sampling circuit when a voltage channel sampling signal is changed in the automatic error over-tolerance detection system for a transformer area electric energy meter according to the present invention;
fig. 5 is a schematic diagram of the working principle of the concentrator system of the station electric energy meter error out-of-tolerance automatic detection system provided by the invention.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Referring to fig. 1-5, an automatic error over-tolerance detection system for a distribution room electric energy meter comprises a single-phase intelligent electric energy meter and a concentrator, wherein the single-phase intelligent electric energy meter comprises a metering core module, a management core module, a communication module and an expansion function module, the metering core module comprises a live wire channel sampling unit, a zero line channel sampling unit and a voltage sampling unit, the communication module comprises three modes of infrared communication, RS485 communication and carrier communication, and the expansion function module comprises a real-time monitoring module, a monitoring alarm module and an annual inspection module;
furthermore, be connected between real-time supervision module and the monitoring alarm module, and real-time supervision module also passes through pulse signal with measurement core module and is connected, monitoring alarm module output connection to single-phase intelligent ammeter, annual inspection module is through timer output connection to single-phase intelligent ammeter, single-phase intelligent ammeter is connected with communication module behind the singlechip, communication module connects mutually through agreement data and concentrator, and single-phase intelligent ammeter and singlechip all are connected with power module.
Wherein the lower limit value of the error trigger set by the single-phase intelligent electric energy meter is 200% +/-3%; the set judgment delay time of the single-phase intelligent electric energy meter is 60s +/-2 s.
In addition, the rate setting values of RS485 communication are 1200bps, 2400bps, 4800bps and 9600bps, and the default value is 2400 bps; the angle theta of infrared communication is as follows: when the sensor is positioned right above, on the left side and on the right side of the central axis, | theta | > is not less than 30 degrees, and when the sensor is positioned right below the central axis, | theta | > is not less than 45 degrees, and the communication baud rate is 1200 bps; the communication baud rate between the single-phase intelligent electric energy meter and the carrier communication is 2400 bps.
When the sampling signal of the voltage sampling unit or the live wire channel sampling unit changes, an excitation signal is input to the signal input end of the voltage sampling unit or the live wire channel sampling unit, the excitation signal is detected at the signal detection end, and the error change condition is judged according to the signal attenuation condition.
In the embodiment, the power module supplies power to the single-phase intelligent electric energy meter and the single-chip microcomputer to enable the single-phase intelligent electric energy meter to normally work, in the working process of the single-phase intelligent electric energy meter, the real-time monitoring module collects a live wire channel, a zero line channel and voltage and transmits the data into the single-chip microcomputer, the single-chip microcomputer judges and detects, when abnormal conditions occur, the data is transmitted to the concentrator through the communication module after passing through the single-chip microcomputer through the monitoring and alarming module, the concentrated data is transmitted to the main system once through the concentrator, meanwhile, in the running process of the single-phase intelligent electric energy meter, the running error of the single-phase intelligent electric energy meter is monitored in real time and converted into protocol data to be transmitted to the concentrator, in addition, when the timer is started to a specified time, the annual inspection module is started, after system detection is performed on circuits in the single-phase intelligent electric energy meter, and the main system prompts the single-phase intelligent electric energy meters with problems, and only the single-phase intelligent electric energy meters with problems need to be replaced during rotation, so that the rotation cost is reduced.
When the sampling signal of the live wire channel of the single-phase intelligent electric energy meter changes, the reason that the sampling signal of the live wire channel changes is mainly caused by the change of the manganese-copper resistance value and the change of the sampling resistance, an excitation signal can be input at the signal input end of the manganese-copper shunt, the excitation signal is detected at the signal detection end, and the error change condition is judged according to the signal attenuation condition (the schematic diagram is shown in figure 3);
when the voltage channel sampling signal of the single-phase intelligent electric energy meter changes, the reason that the voltage channel sampling signal changes is mainly caused by the change of the voltage signal sampling resistance, similarly, an excitation signal can be input at the signal input end of the voltage sampling circuit, the excitation signal is detected at the signal detection end, and the error change condition is judged according to the signal attenuation condition (a schematic diagram is shown in fig. 4).
The working principle of the concentrator is as follows:
the concentrator adopts a high-speed 32-bit embedded microcontroller and a TCOS embedded operating system independently developed on the basis of the controller, has the greatest characteristics of low power consumption and strong anti-interference capability, has abundant interface resources and is easy to expand functions. Meanwhile, data are copied and read in modes of an RS-485 bus with photoelectric isolation, carrier waves and the like, and various data are stored in a large-capacity FLASH. Through a public wireless network, parameters can be set, real-time data, historical data, alarm events and the like can be summoned and tested at a remote main station, and active reporting is supported.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The system is characterized by comprising a single-phase intelligent electric energy meter and a concentrator, wherein the single-phase intelligent electric energy meter comprises a metering core module, a management core module, a communication module and an expansion function module, the metering core module comprises a live wire channel sampling unit, a zero line channel sampling unit and a voltage sampling unit, the communication module comprises three modes of infrared communication, RS485 communication and carrier communication, and the expansion function module comprises a real-time monitoring module, a monitoring alarm module and an annual inspection module;
be connected between real-time supervision module and the monitoring alarm module, and real-time supervision module also is connected through pulse signal with measurement core module, monitoring alarm module output connection to single-phase intelligent ammeter, annual inspection module is through timer output connection to single-phase intelligent ammeter, single-phase intelligent ammeter is connected with communication module behind the singlechip, communication module connects mutually through agreement data and concentrator, and single-phase intelligent ammeter and singlechip all are connected with power module.
2. The system according to claim 1, wherein the single-phase intelligent electric energy meter has a lower error trigger limit of 200% ± 3%.
3. The system according to claim 1, wherein the set decision delay time of the single-phase intelligent electric energy meter is 60s ± 2 s.
4. The system as claimed in claim 1, wherein the RS485 communication rate is set at 1200bps, 2400bps, 4800bps or 9600bps, and the default value is 2400 bps.
5. The system for automatically detecting the error out-of-tolerance of the electric energy meter of the transformer area according to claim 1, wherein the angle θ of the infrared communication is as follows: when the sensor is positioned right above, on the left side and on the right side of the central axis, | theta | > is not less than 30 degrees, and when the sensor is positioned right below the central axis, | theta | > is not less than 45 degrees, and the communication baud rate is 1200 bps.
6. The system of claim 1, wherein the baud rate of the communication between the single-phase smart power meter and the carrier communication is 2400 bps.
7. The system according to claim 1, wherein when the sampling signal of the voltage sampling unit or the fire line channel sampling unit changes, an excitation signal is input to the signal input terminal, the excitation signal is detected at the signal detection terminal, and the error change condition is determined by the signal attenuation condition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011040185.0A CN112068068A (en) | 2020-09-28 | 2020-09-28 | Error out-of-tolerance automatic detection system for electric energy meter in transformer area |
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| CN202011040185.0A CN112068068A (en) | 2020-09-28 | 2020-09-28 | Error out-of-tolerance automatic detection system for electric energy meter in transformer area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816934A (en) * | 2021-03-01 | 2021-05-18 | 云南电网有限责任公司电力科学研究院 | Method and system for judging error self-monitoring accuracy and timeliness of electric energy meter |
| CN112886993A (en) * | 2021-01-26 | 2021-06-01 | 中电装备山东电子有限公司 | Platform district HPLC communication device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061549A (en) * | 2018-10-12 | 2018-12-21 | 浙江正泰仪器仪表有限责任公司 | A kind of electric energy meter detecting measurement error |
| CN209673983U (en) * | 2018-12-30 | 2019-11-22 | 广东电网有限责任公司 | A kind of intelligent electric energy meter measurement error monitoring device |
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- 2020-09-28 CN CN202011040185.0A patent/CN112068068A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061549A (en) * | 2018-10-12 | 2018-12-21 | 浙江正泰仪器仪表有限责任公司 | A kind of electric energy meter detecting measurement error |
| CN209673983U (en) * | 2018-12-30 | 2019-11-22 | 广东电网有限责任公司 | A kind of intelligent electric energy meter measurement error monitoring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112886993A (en) * | 2021-01-26 | 2021-06-01 | 中电装备山东电子有限公司 | Platform district HPLC communication device |
| CN112816934A (en) * | 2021-03-01 | 2021-05-18 | 云南电网有限责任公司电力科学研究院 | Method and system for judging error self-monitoring accuracy and timeliness of electric energy meter |
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Application publication date: 20201211 |
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