CN1084475C - Concentrated intelligent watt-hour meter - Google Patents
Concentrated intelligent watt-hour meter Download PDFInfo
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- CN1084475C CN1084475C CN 97121316 CN97121316A CN1084475C CN 1084475 C CN1084475 C CN 1084475C CN 97121316 CN97121316 CN 97121316 CN 97121316 A CN97121316 A CN 97121316A CN 1084475 C CN1084475 C CN 1084475C
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Abstract
The present invention relates to a multi-user concentrated intelligent watt-hour meter which comprises a three-phase wire inlet unit, a voltage and current sampling unit, a family separating metering unit, a user wire connecting unit, an electricity consumption display unit, a data processing unit, an automatic meter reading unit and an electric power supply, wherein multipath output ends of the sampling unit are parallelly connected to the family separating metering unit; one path of the metering unit is connected to the processing unit, and the other path is connected to the display unit; the input ends of the metering reading unit and a carrier communication unit are connected with the output end of the processing unit. The meter has no metering leakage, prevents electricity theft, and ensures few wire loss phenomena in electricity supply networks; besides, the precision of the recorded electricity power consumption conforms to the specified requirements of the watt-hour meter.
Description
The present invention relates to be used in the electric system measure the device of the time integral of electric power or electric current, refer to it is the occasion that is applicable to multi-user's centralized power distribution especially, as the concentrated intelligent watt-hour meter of residential building building, commercial and residential building etc.
Traditional used electric energy meter of civilian power consumer is generally single-phase type and is table one family, power department is manual type to its all management of adopting (check meter, charge, control etc.), along with the development of electric utility, obviously this traditional metering method awaits improving.Chinese patent CN2247819 Y, application number 96229905.7 all are improvement of being done at traditional single-phase type one table one family electric energy meter, they have all adopted the concentrating type electric energy meter, that is: the change single phase power supply is powered, become table one family into external three phase network and shows and adopted Control Technique of Microcomputer into many families one.The circuit principle structure of above-mentioned these two kinds of electric energy meters can be summarized as follows, adopted the three-phase input circuit, the electric current and voltage sample circuit, amplifying circuit, the A/D circuit, the CPU treatment circuit, register, automatic data logging circuit and the power circuit that supplies electric energy meter work, the three-phase input circuit exports the signal on each subscribers feeder through the electric current and voltage sample circuit, the simulating signal of sample circuit output is exported to amplifying circuit and is amplified, pass through A/D circuit and CPU processing circuit processes then, signal after the processing is connected to register and automatic data logging circuit more respectively, these two kinds of electric energy meters have adapted to the electric utility development and the common people's needs, on certain degree, they can realize measuring respectively and showing, concentrate observing and controlling, measuring accuracy increases, power consumption is few, volume is little.But, as any technology, there is following shortcoming inevitably in they, Here it is: A) because register is to be connected on after the CPU treatment circuit, in case the circuit of cpu circuit or its front breaks down, then register is not just counted, and user power utilization as usual, the situation of free electricity consumption takes place, and has increased the line loss of supply network; B) owing to be that arbitrary user institute power consumption stream with a certain phase voltage and three-phase current multiplies each other in the three-phase input circuit, cause the signal of being sampled to have phase differential (existing phase differential between the three-phase voltage causes), influenced the precision of measuring; C) since CPU output be the digital processing signal, so the verification of dispatching from the factory of ammeter is needed special instrument and program, be unsuitable for the batch process of product.
Task of the present invention is the shortcoming that exists at above-mentioned electric energy meter, and a kind of precision height, metering in good time, verification three-phase simple, that easily produce in batches and single-phase integrated multi-user's concentrated intelligent watt-hour meter are provided.
In order to finish above-mentioned task, the present invention adopts following technical scheme: this intelligent electric energy meter mainly comprises three-phase wire inlet unit, electric current and voltage sampling unit, terminal block unit, power consumption display unit, data processing unit, automatic data logging unit, power supply, be with the difference of existing electric energy meter: this electric energy meter also includes the household metering unit, electric current and voltage sampling unit multidiameter delay exports the household metering unit to, the household metering unit is divided into two tunnel outputs, one the tunnel exports data processing unit to, concentrates the data-signal of observing and controlling so that power department to be provided; One the tunnel exports the power consumption display unit to, and so that the signal that can show each user power utilization amount respectively to be provided, the input of automatic data logging unit and the output of data processing unit are joined.
Because the output that the present invention directly is connected to the household metering unit with the input of power consumption display unit replaces the output that data processing unit is joined, simultaneously the input of automatic data logging is connected in the output of the input of power consumption display unit of existing electric energy meter and data processing unit, even after data processing unit breaks down, do not influence counting to user's power consumption yet, under the monitoring of carrier communication unit, can not take place because of leaking the line loss phenomenon of the supply network that meter and stealing produce yet; Simultaneously owing to adopt electric current and voltage sampling unit same-phase multidiameter delay to export the mode of household metering unit to, what make that the electricity consumption display unit put down in writing is the voltage of same phase and the electric current electric power of gained that multiplies each other, and then the precision of electric energy meter is met the requirements prescribed more.
Below in conjunction with drawings and Examples, the present invention is described in further detail:
Fig. 1 is existing cluster electric energy meter principle block diagram.
Fig. 2 is a principle block diagram of the present invention.
Fig. 3 is three-phase wire inlet unit of the present invention, electric current and voltage sampling unit schematic block diagram.
Fig. 4 is a household metering of the present invention unit principle schematic.
Fig. 5 is a household metering circuit theory synoptic diagram of the present invention.
Fig. 6 is a data processing unit electricity principle schematic of the present invention.
Fig. 7 is a power supply principle schematic of the present invention.
Fig. 8 is a carrier communication of the present invention unit schematic block diagram.
As can be seen from Figure 1, existing concentrating type electric energy meter has also adopted three-phase voltage L1, L2, the L3 inlet wire, the electric current and voltage sample circuit is arranged thereafter, amplifying circuit, the A/D circuit, the CPU treatment circuit, register, automatic data logging circuit and the power circuit that electric energy meter work is provided, sample circuit is delivered to analog amplify circuit with each user's current sample current signal in the mode of serial, signal after the amplification is sent into the CPU treatment circuit after the conversion of A/D circuit, measure and register is the digital signal that root a tree name CPU sends, the digital signal of CPU is also delivered to the automatic data logging circuit so that electric power competent authorities carry out observing and controlling on the other hand.Just because of this, the register of this electric energy meter is counted the restriction that is subjected to the CPU treatment circuit to user power utilization, and (comprising man-made fault and mechanical fault) all can make register not work once the latter breaks down, and will certainly increase the line loss of supply network like this.In addition, though the user of electric energy meter powers by the three-phase voltage parallel powering, the elementary winding of the input transformer of the power supply that electric energy meter self work is required has only one group, and is not good enough to the functional reliability of electric energy meter self.
See also Fig. 2, shown in Figure 3, intelligent electric energy meter of the present invention is except mainly comprising three-phase wire inlet unit 1, electric current and voltage sampling unit 2, terminal block unit 4, power consumption display unit 5, data processing unit 6, automatic data logging unit 7, power supply 8, it also includes household metering unit 3, each user's current signal that electric current and voltage sampling unit 2 is sampled all outputs to household metering unit 3 simultaneously, promptly be multidiameter delay and export household metering unit 3 to, on the theory structure of electric energy meter, electric current and voltage sampling unit 2 includes and three-phase voltage inlet wire (A, B, C) corresponding three groups of current transformer unit 21,22,23, each group current transformer unit 21,22, the quantity of 23 contained current transformers is corresponding with the number of users on this phase voltage, one user, one current transformer, the output of each current transformer are all as the parallel household metering unit 3 that is connected to of an output of electric current and voltage sampling unit 2.Household metering unit 3 includes and three-phase voltage inlet wire L1, the corresponding three blocks of household metering plates 31,32,33 of L2, L3, please in conjunction with Fig. 4, be furnished with the household metering circuit with the corresponding quantity of output of electric current and voltage sampling unit 21,22,23 on each piece household metering plate 31,32,33, N current transformer and N household metering circuit just arranged if any N user.Having drawn in Fig. 4 has 8 metering circuits on the metering plate 31, and corresponding just have 8 users.The household metering circuit can be referring to Fig. 5, this circuit is a known circuit, it contains electric energy meter application-specific integrated circuits N101, thick film network resistance A101, crystal oscillator G101, triode V101, and Resistor-Capacitor Unit, phase voltage L meets 3 of N101 after by the A101 dividing potential drop, 4 pin, the VI end is input end, the received current sampled signal, the Vm end is the detection signal output terminal, output+5V pulse signal is to data processing unit 6, the Vo end is for showing output terminal, in order to be connected to power consumption display unit 5, so just can make the household metering unit 3 of all users under the same phase voltage be divided into two tunnel outputs, one the tunnel exports data processing unit 6 to, concentrates the data-signal of observing and controlling so that power department to be provided; One the tunnel exports power consumption display unit 5 to, so that the signal that can show each user power utilization amount respectively to be provided.
As shown in Figure 6, the principles illustrated of data processing unit 6 is as follows, this unit 6 contains branch family sample circuit U1, sampling switch circuit U2 and controlling of sampling circuit U 3, central processing unit U4, our hypothesis has 24 users in the present embodiment, branch family sample circuit U1 just is made of 24 identical circuit, each divides the family sample circuit to receive the signal of household metering unit 3, and output to sampling switch circuit U2 and controlling of sampling circuit U 3, the output of sampling switch circuit U2 and controlling of sampling circuit U 3 is connected to central processing unit U4, the output of processor U4 is connected to automatic data logging unit 7, and it is used to carry out automatic data logging for power supply department.The mode that the mode of automatic data logging can adopt existing infrared copy meter or radio to check meter.Branch family sample circuit U1 can gather the pulse on the household metering unit 3 in real time and maintain, and sends interruption to central processing unit U4, and sampling switch U2 is responsible for central processing unit U4 is sent in the pulse of sample circuit along separate routes in an orderly manner.Central processing unit U4 is one 8751 single-chip microcomputers, be solidified with the supervisory routine such as the automatic data logging that contains, charge, monitoring, control of this electric energy meter in the central processing unit U4, processor U4 receives the pulse signal of sampling switch circuit U2 and controlling of sampling circuit U 3, formed each user's actual power consumption after treatment, these pulse signals output in other circuit of back.In addition; please consult Fig. 6 again; can be as required; can be connected to carrier communication unit 9 and communication interface unit 10 behind the data processing unit 6 and concentrate monitoring used, behind the central processing unit U4 of data processing unit 6, also be connected to power down protection circuit U 8 for power supply departments such as long distance meter reading, the setting of remote control parameter, electric power load monitoring and controls.Structurally, data processing unit 6, carrier communication unit 9, communication interface unit 10 and power down protection circuit U 8 can place on the plate.
See also shown in Figure 7, power supply 8 is by the three-phase voltage parallel powering, the input end of power supply 8 is one to have three same primary winding B1, B2, the three-phase input potential device of B3, three-phase voltage is connected to three elementary winding B1 of input potential device respectively, B2, B3, this power supply 8 is except three-phase input potential device, the single-phase output of power supply 8 and the circuit of remainder are with existing common power or Switching Power Supply (just not drawing among the figure), and the output V of power supply 8 receives household metering plate unit 3 respectively, data processing plate unit 6, power consumption display unit 5, and carrier communication unit 9.
See also shown in Figure 8, carrier communication unit 9 contains a numerical selection circuit U 5, central processing circuit U6 and special carrier processor U7, numerical selection circuit U 5 and central processing circuit U6 and carrier processor U7 join, the output of the input of central processing circuit U6 and data processing unit 6 is joined, and the carrier processing signal is exported from carrier processor U7.
Electric energy meter is when dispatching from the factory, need through verification and metering before dispatching from the factory, detection signal among the present invention is after directly being produced by household metering unit 3, by data processing unit 6, communication interface unit 10 is used in combination with 7 pairings of automatic data logging unit, automatic data logging unit 7 sends by communication interface unit 10 to each family electricity consumption data that data processing unit 6 sends in the interruptive command CPU (central processing unit) 6, simultaneously data processing unit 6 can also receive the selected user who sends automatic data logging unit 7 and carries out carrying out the order of calibration and on-site proving from door to door by communication interface unit 10, and each user corresponds to the output of a household metering circuit in the household metering unit 3.The signal that detects is actual power consumption pulse simulation amount, rather than the digital quantity in Chinese patent CN 2247819 Y and the application number 96229905.7, so in the present invention, when measuring with verification to power consumption display unit 3, its method is with the metering method of traditional electron watt-hour meter, and adopt the tester of pulse relative method all can utilize, do not need to be equipped with again special instrument.
Claims (9)
1. the concentrated intelligent watt-hour meter of the civilian multi-user's centralized power distribution of confession, electric energy meter mainly comprises three-phase wire inlet unit (1), electric current and voltage sampling unit (2), terminal block unit (4), power consumption display unit (5), data processing unit (6), automatic data logging unit (7), power supply (8), it is characterized in that: electric energy meter also includes household metering unit (3), household metering unit (3) includes and the corresponding three blocks of household metering plates of three-phase voltage inlet wire (31), (32), (33), electric current and voltage sampling unit (2) multidiameter delay exports household metering unit (3) to, household metering unit (3) is divided into two tunnel outputs, one the tunnel exports data processing unit (6) to, concentrates the data-signal of observing and controlling so that power department to be provided; One the tunnel exports power consumption display unit (5) to, so that the signal that can show each user power utilization amount respectively to be provided; Electric current and voltage sampling unit (2) includes and the corresponding three groups of current transformer unit of three-phase voltage inlet wire (21), (22), (23); The output of the input of automatic data logging unit (7) and data processing unit (6) is joined.
2. concentrated intelligent watt-hour meter as claimed in claim 1, it is characterized in that: the quantity of the current transformer that said each group current transformer unit (21), (22), (23) are contained is corresponding with the number of users on this phase voltage, and the output of each current transformer all walks abreast as the output of electric current and voltage sampling unit (2) and is connected to household metering unit (3).
3. concentrated intelligent watt-hour meter as claimed in claim 1 is characterized in that: be furnished with the household metering circuit with the corresponding quantity of output of electric current and voltage sampling unit (21), (22), (23) on said each piece household metering plate (31), (32), (33).
4. concentrated intelligent watt-hour meter as claimed in claim 1, it is characterized in that: said power supply (8) is by the three-phase voltage parallel powering, the input end of power supply (8) is one to have the potential device of three same primary windings (B1, B2, B3), three-phase voltage inlet wire (L1, L2, L3), join with elementary winding (B1, B2, B3) respectively, the output terminal of power supply (8) is connected to household metering plate unit (3), data processing plate unit (6), power consumption display unit (5) respectively.
5. as each described concentrated intelligent watt-hour meter of claim 1 to 4, it is characterized in that: behind said data processing unit (6), also be connected to a carrier communication unit (9).
6. as each described concentrated intelligent watt-hour meter of claim 1 to 4, it is characterized in that: behind said data processing unit (6), be connected to a communication interface unit (10).
7. concentrated intelligent watt-hour meter as claimed in claim 5 is characterized in that: be connected to a communication interface unit (10) behind said data processing unit (6).
8, concentrated intelligent watt-hour meter as claimed in claim 6 is characterized in that: communication interface unit (10) combines with automatic data logging unit (7), can realize selecting arbitrarily showing tool behind the tested user and editing.
9, concentrated intelligent watt-hour meter as claimed in claim 7 is characterized in that: communication interface unit (10) combines with automatic data logging unit (7), can realize selecting arbitrarily showing tool behind the tested user and editing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97121316 CN1084475C (en) | 1997-10-24 | 1997-10-24 | Concentrated intelligent watt-hour meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97121316 CN1084475C (en) | 1997-10-24 | 1997-10-24 | Concentrated intelligent watt-hour meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1182215A CN1182215A (en) | 1998-05-20 |
| CN1084475C true CN1084475C (en) | 2002-05-08 |
Family
ID=5176243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97121316 Expired - Fee Related CN1084475C (en) | 1997-10-24 | 1997-10-24 | Concentrated intelligent watt-hour meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1084475C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323461A (en) * | 2011-08-10 | 2012-01-18 | 山东计保电气有限公司 | Unit multi-user intelligent electric energy meter box |
| CN104765015A (en) * | 2015-04-16 | 2015-07-08 | 国家电网公司 | Method for rapidly testing measurement wiring correctness by means of data integration method |
-
1997
- 1997-10-24 CN CN 97121316 patent/CN1084475C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1182215A (en) | 1998-05-20 |
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