CN105182063A - Single-phase electric energy meter, maximum current continuous monitoring method and current variation monitoring method - Google Patents
Single-phase electric energy meter, maximum current continuous monitoring method and current variation monitoring method Download PDFInfo
- Publication number
- CN105182063A CN105182063A CN201510627889.0A CN201510627889A CN105182063A CN 105182063 A CN105182063 A CN 105182063A CN 201510627889 A CN201510627889 A CN 201510627889A CN 105182063 A CN105182063 A CN 105182063A
- Authority
- CN
- China
- Prior art keywords
- current
- electric energy
- energy meter
- day
- terminals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a single-phase electric energy meter, a maximum current continuous monitoring method and a current variation monitoring method. According to the technical points, a current sampling circuit of the electric energy meter adopts a manganin current divider; the manganin current divider is provided with three wiring ends; and three leads, respectively a grounding lead L, a current sampling negative lead I- and a current sampling positive lead I+, are respectively led on the three wiring ends. When any of the grounding lead L, the current sampling negative lead I- and the current sampling positive lead I+ is broken, an extremely large input signal is generated at the current input end of a metering chip, the metering chip is caused to output large energy pulses, and in such situation, through judging abnormal electric quantity fly off happens to the electric energy meter in the maximum current continuous monitoring method and the current variation monitoring method, and electric quantity fly off fault caused by pseudo soldering of the connection line of the manganin current divider can be effectively prevented from happening to the single-phase electric energy meter.
Description
Technical field
The present invention relates to a kind of single-phase intelligent electric energy, particularly relate to a kind of single-phase electric energy meter and maximum current continuous surveillance method and current change quantity thereof and monitor method.
Background technology
The current sampling circuit main flow of single-phase intelligent electric energy meter is all the mode adopting manganese copper diverter, when being installed to on-the-spot table meter, several threads on its manganese copper diverter due to various factors cause disconnect time, computation chip end can be caused to sample abnormal large current signal, thus the electricity of the lower mistake of metering.
Summary of the invention
For the deficiency that prior art exists, the object of this invention is to provide a kind of single-phase electronic energy meter of can effectively avoiding and to fly away a kind of single-phase intelligent electric energy of fault due to electricity that manganese copper diverter connecting line rosin joint causes.
For achieving the above object, the invention provides following technical scheme: a kind of single-phase electric energy meter, electric energy meter is provided with manganese copper diverter, described manganese copper diverter is connected with the current sampling circuit for sensed current signal, described electric energy meter is also provided with the computation chip for controlling electric energy meter power-off, described manganese copper diverter includes L terminals, I ﹣ terminals and I+ terminals, three terminals draw respectively three sample line, described L terminals ground connection, described I ﹣ wiring termination current sample negative pole, described I+ wiring termination current sample positive pole, described I ﹣ terminals and I+ terminals are connected with current sampling circuit by sample line, article three, when in sample line, any single line occurs to disconnect, capital produces very large input signal at the current input terminal of computation chip, computation chip is caused to export a large amount of energy pulses.
As preferably, described current sampling circuit comprises electric capacity C1, electric capacity C2, resistance R1 and resistance R2, one end of described electric capacity C1 is held with the IAP of computation chip and is connected, the other end is connected with electric capacity C2, the other end that described electric capacity C2 is connected with electric capacity C1 is held with the LAN of computation chip and is connected, the link ground connection of described electric capacity C1 and electric capacity C2, one end of described resistance R1 is held with the IAP of computation chip and is connected, the other end is connected with I ﹣ terminals by sample line, one end of described resistance R2 is held with the LAN of computation chip and is connected, and the other end is connected with I+ terminals by sample line.
As preferably, described sampling circuit also includes resistance R3, one end of described resistance R3 is connected with I ﹣ terminals by sample line, and the other end is connected with I+ terminals by sample line.
A maximum current continuous surveillance method for single-phase intelligent electric energy meter, comprises the following steps: (1), as electric current >12Ib, counter M >=8640(is equivalent to lasting 24 hours) time then M no longer increase, and " fly away mark 1 " puts 1; Otherwise M adds 1; (2) as electric current≤12Ib, counter M resets, and " fly away mark 1 " sets to 0.
As preferably, the monitoring frequency of described maximum current continuous surveillance method: every 10 seconds.
As preferably, the process means of described maximum current continuous surveillance method: when " fly away mark 1 " is 1, the pulse received is not counted in electric energy totalizer.
A kind of current change quantity monitoring method of single-phase electric energy meter, comprise the following steps: (1) power on or sky carry time by every day maximum current and every day minimum current, counter N resets, after instantaneous value per second reads back, every day, minimum current was 0, then direct current flow covers, and every day, minimum current was not 0, then current flow compares with minimum current every day, whether little, little than original value, cover; Current flow compares with maximum current every day, is greater than, and covers; (2), after determining program, counter N adds 1(such as N=65535 and 0xFFFFH and does not then add), current " fly away mark 2 " is 1, and N>10, and every day, maximum current was less than or equal to 40A, then " fly away mark 2 " immediately clear 0; Every day, maximum current was greater than 40A, and every day maximum current and every day minimum current between difference be more than or equal to 2A, " fly away mark 2 " also immediately clear 0; (3) when there is sky carry, counter N is not equal to 65535(and means that the monitoring period of maximum current and minimum current is greater than 18 hours), do not deal with (" fly away mark 2 " sets to 0), N=65535, every day, whether maximum current was greater than 40A, did not meet and did not also deal with (" fly away mark 2 " sets to 0), every day, maximum current is greater than 40A, and every day maximum current and every day minimum current between difference be less than 2A, then " fly away mark 2 " puts 1, otherwise " fly away mark 2 " sets to 0.
As preferably, the monitoring frequency of described current change quantity monitoring method: every 1 second, 1 cycle of every day.
As preferably, the process means of described current change quantity monitoring method: when " fly away mark 2 " is 1, the pulse received is not counted in electric energy totalizer.
The invention has the beneficial effects as follows: judge that electric energy meter there occurs exception of flying away by " maximum current continuous surveillance method " and " current change quantity monitoring method ", thus no longer measure this kind and fly away " the abnormal electricity " that produce under situation, with the legitimate interests of Protection of consumer, avoid unnecessary electricity dispute, electric energy meter is by judging timely, at I ﹣, series resistor R3 between I+ terminals, after being connected in series suitable resistance, even if sample line rosin joint comes off, the stray EM field of sample line induction, after resistance R3, the differential thief hatch IAP of input metering, the difference mode signal of IAN ensures below starting current, the exception of electric energy meter then can not be caused to measure, avoid the generation that electricity flies away, by stopping the mode of metering, main website returns electric quantity data by concentrator collection, again bug list meter is torn open back into row maintenance after noting abnormalities, the situation avoiding electric energy meter electricity to fly away occurs, the electricity clearing between power supply department and electricity consumption user are avoided to produce dispute.
Accompanying drawing explanation
Fig. 1 is the system chart of the method for single-phase electric energy meter of the present invention and maximum current continuous surveillance method and current change quantity monitoring method;
Fig. 2 is the circuit theory diagrams of single-phase electric energy meter of the present invention and maximum current continuous surveillance method and current change quantity monitoring method;
Fig. 3 is the sampling circuit schematic diagram of single-phase electric energy meter of the present invention and maximum current continuous surveillance method and current change quantity monitoring method.
In figure: 1, electric energy meter; 2, manganese copper diverter; 3, sampling circuit; 4, computation chip.
Embodiment
Shown in Fig. 3, a kind of single-phase electric energy meter that present case is implemented, electric energy meter 1 is provided with manganese copper diverter 2, described manganese copper diverter 2 is connected with the current sampling circuit for sensed current signal, described electric energy meter 1 is also provided with the computation chip 4 for controlling electric energy meter 1 power-off, described manganese copper diverter 2 includes L terminals, I ﹣ terminals and I+ terminals, three terminals draw respectively three sample line, described L terminals ground connection, described I ﹣ wiring termination current sample negative pole, described I+ wiring termination current sample positive pole, described I ﹣ terminals and I+ terminals are connected with current sampling circuit 3 by sample line, article three, when in sample line, any single line occurs to disconnect, capital produces very large input signal at the current input terminal of computation chip 4, computation chip 4 is caused to export a large amount of energy pulses,
Described current sampling circuit 3 comprises electric capacity C1, electric capacity C2, resistance R1 and resistance R2, one end of described electric capacity C1 is held with the IAP of computation chip 4 and is connected, the other end is connected with electric capacity C2, the other end that described electric capacity C2 is connected with electric capacity C1 is held with the LAN of computation chip 4 and is connected, the link ground connection of described electric capacity C1 and electric capacity C2, one end of described resistance R1 is held with the IAP of computation chip 4 and is connected, the other end is connected with I ﹣ terminals by sample line, one end of described resistance R2 is held with the LAN of computation chip 4 and is connected, the other end is connected with I+ terminals by sample line, described sampling circuit 3 also includes resistance R3, one end of described resistance R3 is connected with I ﹣ terminals by sample line, the other end is connected with I+ terminals by sample line.
A maximum current continuous surveillance method for single-phase intelligent electric energy meter, comprises the following steps: (1), as electric current >12Ib, counter M >=8640(is equivalent to lasting 24 hours) time then M no longer increase, and " fly away mark 1 " puts 1; Otherwise M adds 1; (2) as electric current≤12Ib, counter M resets, and " fly away mark 1 " sets to 0, the monitoring frequency of described maximum current continuous surveillance method: every 10 seconds, the process means of described maximum current continuous surveillance method: when " fly away mark 1 " is 1, the pulse received is not counted in electric energy totalizer.
A kind of current change quantity monitoring method of single-phase electric energy meter, comprise the following steps: (1) power on or sky carry time by every day maximum current and every day minimum current, counter N resets, after instantaneous value per second reads back, every day, minimum current was 0, then direct current flow covers, and every day, minimum current was not 0, then current flow compares with minimum current every day, whether little, little than original value, cover, current flow compares with maximum current every day, is greater than, and covers, (2), after determining program, counter N adds 1(such as N=65535 and 0xFFFFH and does not then add), current " fly away mark 2 " is 1, and N>10, and every day, maximum current was less than or equal to 40A, then " fly away mark 2 " immediately clear 0, every day, maximum current was greater than 40A, and every day maximum current and every day minimum current between difference be more than or equal to 2A, " fly away mark 2 " also immediately clear 0, (3) when there is sky carry, counter N is not equal to 65535(and means that the monitoring period of maximum current and minimum current is greater than 18 hours), do not deal with (" fly away mark 2 " sets to 0), N=65535, every day, whether maximum current was greater than 40A, do not meet and do not deal with (" fly away mark 2 " sets to 0) yet, every day, maximum current is greater than 40A, and every day maximum current and every day minimum current between difference be less than 2A, then " fly away mark 2 " puts 1, otherwise " fly away mark 2 " sets to 0, the monitoring frequency of described current change quantity monitoring method: every 1 second, 1 cycle of every day, the process means of described current change quantity monitoring method: when " fly away mark 2 " is 1, the pulse received is not counted in electric energy totalizer.
Judge that electric energy meter 1 there occurs exception of flying away by crossing " maximum current continuous surveillance method " and " current change quantity monitoring method ", thus no longer measure this kind and fly away " the abnormal electricity " that produce under situation;
I+ (or/and the I ﹣) terminals of the manganese copper diverter 2 on electric energy meter 11 and sample line are disconnected, the stray EM field signal of induction, after resistance R3, the difference mode signal of sampling is below electric energy meter 11 starting current, electric energy meter 11 does not measure, resistance R3 resistance is selected can not be too large, otherwise stray EM field difference mode signal after resistance R3 can not ensure below starting current; Can not be too little, should to sample resistance much larger than manganese copper diverter 2, otherwise can normal sample be affected.By analysis, resistance R3 value is 100 ~ 510 Ω, can adjust according to manganese copper diverter 2 resistance size of sampling;
The value of resistance R1 and resistance R2 is 1K, and the value of electric capacity C1 and C2 is 33nF.
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a single-phase electric energy meter, it is characterized in that: electric energy meter is provided with manganese copper diverter, described manganese copper diverter is connected with the current sampling circuit for sensed current signal, described electric energy meter is also provided with the computation chip for controlling electric energy meter power-off, described manganese copper diverter includes L terminals, I ﹣ terminals and I+ terminals, three terminals draw respectively three sample line, described L terminals ground connection, described I ﹣ wiring termination current sample negative pole, described I+ wiring termination current sample positive pole, described I ﹣ terminals and I+ terminals are connected with current sampling circuit by sample line, article three, when in sample line, any single line occurs to disconnect, capital produces very large input signal at the current input terminal of computation chip, computation chip is caused to export a large amount of energy pulses.
2. single-phase electric energy meter according to claim 1, it is characterized in that: described current sampling circuit comprises electric capacity C1, electric capacity C2, resistance R1 and resistance R2, one end of described electric capacity C1 is held with the IAP of computation chip and is connected, the other end is connected with electric capacity C2, the other end that described electric capacity C2 is connected with electric capacity C1 is held with the LAN of computation chip and is connected, the link ground connection of described electric capacity C1 and electric capacity C2, one end of described resistance R1 is held with the IAP of computation chip and is connected, the other end is connected with I ﹣ terminals by sample line, one end of described resistance R2 is held with the LAN of computation chip and is connected, the other end is connected with I+ terminals by sample line.
3. single-phase electric energy meter according to claim 2, is characterized in that: described sampling circuit also includes resistance R3, and one end of described resistance R3 is connected with I ﹣ terminals by sample line, and the other end is connected with I+ terminals by sample line.
4. a maximum current continuous surveillance method for single-phase intelligent electric energy meter, is characterized in that: comprise the following steps:
(1) as electric current >12Ib, counter M >=8640(is equivalent to lasting 24 hours) time then M no longer increase, and " fly away mark 1 " puts 1; Otherwise M adds 1;
(2) as electric current≤12Ib, counter M resets, and " fly away mark 1 " sets to 0.
5. the maximum current continuous surveillance method of single-phase electric energy meter according to claim 4, is characterized in that: the monitoring frequency of described maximum current continuous surveillance method: every 10 seconds.
6. the maximum current continuous surveillance method of the single-phase electric energy meter according to claim 4 or 5, is characterized in that: the process means of described maximum current continuous surveillance method: when " fly away mark 1 " is 1, the pulse received is not counted in electric energy totalizer.
7. a current change quantity monitoring method for single-phase electric energy meter, is characterized in that: comprise the following steps:
(1) power on or sky carry time by every day maximum current and every day minimum current, counter N resets, after instantaneous value per second reads back, every day, minimum current was 0, then direct current flow covers, every day, minimum current was not 0, whether then current flow compares with minimum current every day, less, little than original value, covers; Current flow compares with maximum current every day, is greater than, and covers;
(2), after determining program, counter N adds 1(such as N=65535 and 0xFFFFH and does not then add), current " fly away mark 2 " is 1, and N>10, and every day, maximum current was less than or equal to 40A, then " fly away mark 2 " immediately clear 0; Every day, maximum current was greater than 40A, and every day maximum current and every day minimum current between difference be more than or equal to 2A, " fly away mark 2 " also immediately clear 0;
(3) when there is sky carry, counter N is not equal to 65535(and means that the monitoring period of maximum current and minimum current is greater than 18 hours), do not deal with (" fly away mark 2 " sets to 0), N=65535, every day, whether maximum current was greater than 40A, did not meet and did not also deal with (" fly away mark 2 " sets to 0), every day, maximum current is greater than 40A, and every day maximum current and every day minimum current between difference be less than 2A, then " fly away mark 2 " puts 1, otherwise " fly away mark 2 " sets to 0.
8. the current change quantity monitoring method of single-phase electric energy meter according to claim 7, is characterized in that: the monitoring frequency of described current change quantity monitoring method: every 1 second, 1 cycle of every day.
9. the current change quantity monitoring method of the single-phase electric energy meter according to claim 7 or 8, is characterized in that: the process means of described current change quantity monitoring method: when " fly away mark 2 " is 1, the pulse received is not counted in electric energy totalizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627889.0A CN105182063A (en) | 2015-09-28 | 2015-09-28 | Single-phase electric energy meter, maximum current continuous monitoring method and current variation monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627889.0A CN105182063A (en) | 2015-09-28 | 2015-09-28 | Single-phase electric energy meter, maximum current continuous monitoring method and current variation monitoring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105182063A true CN105182063A (en) | 2015-12-23 |
Family
ID=54904280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510627889.0A Pending CN105182063A (en) | 2015-09-28 | 2015-09-28 | Single-phase electric energy meter, maximum current continuous monitoring method and current variation monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105182063A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977444A (en) * | 2015-06-29 | 2015-10-14 | 宁波三星智能电气有限公司 | Current sampling circuit |
| CN110927655A (en) * | 2019-11-21 | 2020-03-27 | 北京中宸泓昌科技有限公司 | Diagnosis method for electric energy meter flying away and high-speed power line carrier module |
| CN113358904A (en) * | 2021-04-30 | 2021-09-07 | 南方电网数字电网研究院有限公司 | Anti-interference device for electric energy meter and wiring method thereof |
| CN118707436A (en) * | 2024-08-30 | 2024-09-27 | 武汉盛帆电子股份有限公司 | Electric energy meter fault detection method and electric energy meter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1038817A (en) * | 1996-07-23 | 1998-02-13 | Mitsubishi Heavy Ind Ltd | Measuring method for unburnt carbon quantity in fly ash and device therefor |
| CN202133717U (en) * | 2011-07-06 | 2012-02-01 | 深圳威胜科技有限公司 | Metering sampling circuit based on manganese-copper diverter |
| CN202929082U (en) * | 2012-11-23 | 2013-05-08 | 江苏卡欧万泓电子有限公司 | Circuit used in intelligent electric energy meter for preventing current sampling offset |
-
2015
- 2015-09-28 CN CN201510627889.0A patent/CN105182063A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1038817A (en) * | 1996-07-23 | 1998-02-13 | Mitsubishi Heavy Ind Ltd | Measuring method for unburnt carbon quantity in fly ash and device therefor |
| CN202133717U (en) * | 2011-07-06 | 2012-02-01 | 深圳威胜科技有限公司 | Metering sampling circuit based on manganese-copper diverter |
| CN202929082U (en) * | 2012-11-23 | 2013-05-08 | 江苏卡欧万泓电子有限公司 | Circuit used in intelligent electric energy meter for preventing current sampling offset |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977444A (en) * | 2015-06-29 | 2015-10-14 | 宁波三星智能电气有限公司 | Current sampling circuit |
| CN104977444B (en) * | 2015-06-29 | 2017-12-12 | 宁波三星智能电气有限公司 | A kind of current sampling circuit |
| CN110927655A (en) * | 2019-11-21 | 2020-03-27 | 北京中宸泓昌科技有限公司 | Diagnosis method for electric energy meter flying away and high-speed power line carrier module |
| CN110927655B (en) * | 2019-11-21 | 2022-03-29 | 北京中宸泓昌科技有限公司 | Diagnosis method for electric energy meter flying away and high-speed power line carrier module |
| CN113358904A (en) * | 2021-04-30 | 2021-09-07 | 南方电网数字电网研究院有限公司 | Anti-interference device for electric energy meter and wiring method thereof |
| CN118707436A (en) * | 2024-08-30 | 2024-09-27 | 武汉盛帆电子股份有限公司 | Electric energy meter fault detection method and electric energy meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202931282U (en) | General telecommand acquisition module for distribution network terminal | |
| CN105182063A (en) | Single-phase electric energy meter, maximum current continuous monitoring method and current variation monitoring method | |
| CN101738565A (en) | Adaptive fault indicator | |
| CN107834977A (en) | A kind of photovoltaic module intelligent wiring box and its control method | |
| CN103454581A (en) | Contactor performance testing equipment | |
| CN202600064U (en) | Long-distance real-time online detector for lightning arrester | |
| CN210835062U (en) | Electric energy meter with multiple protection functions | |
| CN106053995A (en) | Intelligent electric energy acquisition terminal | |
| CN203101558U (en) | Fault screening device for electric equipment | |
| CN204287418U (en) | A kind of circuit breaker switch state pick-up unit | |
| CN106132050A (en) | Intelligent road-lamp with residual current protecting controls chopper | |
| CN203941243U (en) | A kind of three-phase electric power open phase testing circuit | |
| CN115166494B (en) | Intelligent IT online circuit detection monitoring device | |
| CN209560016U (en) | A kind of DC power supply plate connector detection system | |
| CN204578064U (en) | A kind of line protective devices with humidity alarm | |
| CN202110264U (en) | Monitoring device of aging of electrical element | |
| CN105137140A (en) | Single-phase electronic electric energy meter capable of preventing electric quantity from flying away | |
| CN204166058U (en) | A kind of city electro-mechanical wave quick detection circuit | |
| CN201402973Y (en) | Protective device for power supply lines | |
| CN205017102U (en) | Power consumption distribution intelligent monitoring subassembly | |
| CN203800580U (en) | Intelligent controller for low voltage breaker | |
| CN205543129U (en) | Battery maintenance appearance based on distribution automation terminal | |
| CN204706883U (en) | A kind of Novel lightning-proof case | |
| CN211718442U (en) | Combined fault arc detector | |
| CN205811512U (en) | A kind of power-off control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151223 |