CN102680779B - The self-adaptation control method of a kind of three-phase electric energy meter and three-phase electric energy meter - Google Patents
The self-adaptation control method of a kind of three-phase electric energy meter and three-phase electric energy meter Download PDFInfo
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Abstract
The invention discloses the self-adaptation control method of a kind of three-phase electric energy meter and three-phase electric energy meter.The self-adaptation control method of three-phase electric energy meter is by differentiating that the scope of three-phase voltage between phases angle and the three-phase voltage value accessed determines the access way of three-phase electric energy meter, access way according to three-phase electric energy meter calls process program and the quantitative model of correspondence, realize 1 piece of three-phase electric energy meter and automatically adapt to the access environment of three-phase and four-line 3 × 57.7/100V, three-phase and four-line 3 × 220/380V or phase three-wire three 3 × 100V, decrease the product specification of electric energy meter, be greatly reduced production difficulty and the management difficulty of manufacturing enterprise and user.
Description
[technical field]
The present invention relates to three-phase electric energy meter, particularly relate to self-adaptation control method and the three-phase electric energy meter of a kind of three-phase electric energy meter.
[background technology]
Three phases electronic energy meter is widely used in the various aspects of national economy, in the bid of the annual whole nation and the quantity installed ten million, as electric energy metering device, difference according to electricity consumption and management occasion, the access way of three-phase electric energy meter is divided into high pressure gauge (3 × 57.7/100V, 3 × 100V), low-pressure meter (3 × 220/380V), is divided into phase three-wire three electronic electric energy meter and three-phase and four-line electronic electric energy meter from the access way of application angle three-phase electric energy meter.The man of manufacturer producing electric energy meter needs the root also will with the electric energy meter producing three kinds of voltage specifications according to client.
[summary of the invention]
The technical problem to be solved in the present invention is to provide one and realizes the control method that 1 piece of three-phase electric energy meter adapts to the access environment of three-phase and four-line 3 × 57.7/100V, three-phase and four-line 3 × 220/380V or phase three-wire three 3 × 100V automatically.
The present invention another to solve the technical problem that be to provide one can automatically adapt to three-phase and four-line 3 × 57.7/100V, three-phase and four-line 3 × 220/380V or phase three-wire three 3 × 100V access environment three-phase electric energy meter.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is, a kind of self-adaptation control method of three-phase electric energy meter, by differentiating that the scope of three-phase voltage between phases angle and the three-phase voltage value accessed determines the access way of three-phase electric energy meter, access way according to three-phase electric energy meter calls process program and the quantitative model of correspondence, it is achieved 1 piece of three-phase electric energy meter adapts to the access environment of three-phase and four-line 3 × 57.7/100V, three-phase and four-line 3 × 220/380V or phase three-wire three 3 × 100V automatically.
The self-adaptation control method of above-described three-phase electric energy meter, in three-phase voltage between phases angle 1 is between 220 ° to 260 °, other 2 between 100 ° to 140 ° or in three-phase voltage between phases angle 2 are between 220 ° to 260 °, other 1 between 100 ° to 140 °, then it is judged to three-phase and four-line access way, then the voltage carrying out three-phase and four-line judges；If can not meet, then carry out phase three-wire three 3 × 100V access way and judge.
The self-adaptation control method of above-described three-phase electric energy meter, in the voltage decision process of three-phase and four-line, has any one more than 130V in the three-phase voltage of access, is then judged to the access way of 3 × 220/380V；Three-phase voltage as accessed is respectively less than 70V, then be judged to the access way of 3 × 57.7/100V；As all do not met, then enter alarm condition.
The self-adaptation control method of above-described three-phase electric energy meter, when carrying out phase three-wire three 3 × 100V access way and judging, the three-phase voltage as accessed is respectively less than 70V, then be judged to phase three-wire three 3 × 100V access way；No it is unsatisfactory for, then enters alarm condition.
The self-adaptation control method of above-described three-phase electric energy meter, the result of judgement is stored after determining the access way of three-phase electric energy meter, when powering on after having a power failure every time, when judging to have a power failure, whether wiring end cover is opened, as wiring end cover was not turned on, then call original process program and quantitative model by the access way of the three-phase electric energy meter stored；As wiring end cover is opened, then determine the access way of three-phase electric energy meter again through the scope differentiating three-phase voltage between phases angle and the three-phase voltage value accessed, call process program and the quantitative model of correspondence according to the new three-phase electric energy meter access way judged.
A kind of technical scheme of the three-phase electric energy meter realizing above-mentioned self-adaptation control method, including power measurement and data processing unit, three-phase voltage sample circuit, three-phase current sample circuit, end cap open detection circuit and power circuit, described power circuit includes back-up source；The signal output part of three-phase voltage sample circuit and three-phase current sample circuit connects power measurement and data processing unit respectively, and end cap open detection circuit connects power measurement and data processing unit；Described three-phase voltage sample circuit includes A phase voltage sample circuit, B phase voltage sample circuit and C phase voltage sample circuit；Described three-phase current sample circuit includes A phase current sampling circuit, B phase current sampling circuit and C phase current sampling circuit.
Above-described three-phase electric energy meter, mains side A phase firewire connects the input of A phase voltage sample circuit and the first end of A phase current sampling circuit, the second terminating load side A phase firewire of A phase current sampling circuit；Mains side B phase firewire connects the input of B phase voltage sample circuit and the first end of B phase current sampling circuit, the second terminating load side B phase firewire of B phase current sampling circuit；Mains side C phase firewire connects the input of C phase voltage sample circuit and the first end of C phase current sampling circuit, the second terminating load side C phase firewire of C phase current sampling circuit；Mains side zero line connects voltage sampling circuit reference edge, and load-side zero line connects voltage sampling circuit reference edge.
Above-described three-phase electric energy meter, including A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor, A phase firewire connects the input of A phase voltage sample circuit, B phase firewire connects the input of B phase voltage sample circuit, C phase firewire connects the input of C phase voltage sample circuit, and zero line connects voltage sampling circuit reference edge；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；B phase current mutual inductor Secondary Winding first terminates the first end of B phase current sampling circuit, and second terminates the second end and the ground of B phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
Above-described three-phase electric energy meter, including A phase voltage transformer, B phase voltage transformer, C phase voltage transformer, A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor, the first termination A phase firewire of an A winding of phase voltage transformer, the second end ground connection；The input of the first termination A phase voltage sample circuit of A phase voltage transformer Secondary Winding, the second end ground connection；First termination B phase firewire of a B winding of phase voltage transformer, the second end ground connection；The input of the first termination B phase voltage sample circuit of B phase voltage transformer Secondary Winding, the second end ground connection；First termination C phase firewire of a C winding of phase voltage transformer, the second end ground connection；The input of the first termination C phase voltage sample circuit of C phase voltage transformer Secondary Winding, the second end ground connection；Zero line connects voltage sampling circuit reference edge；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；B phase current mutual inductor Secondary Winding first terminates the first end of B phase current sampling circuit, and second terminates the second end and the ground of B phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
Above-described three-phase electric energy meter, including A phase voltage transformer, C phase voltage transformer, A phase current mutual inductor and C phase current mutual inductor, the first termination A phase firewire of an A winding of phase voltage transformer, the second termination B phase firewire；The input of the first termination A phase voltage sample circuit of A phase voltage transformer Secondary Winding, the second end ground connection；The input end grounding of B phase voltage sample circuit；First termination C phase firewire of a C winding of phase voltage transformer, the second termination B phase firewire；The input of the first termination C phase voltage sample circuit of C phase voltage transformer Secondary Winding, the second end ground connection；Voltage sampling circuit reference edge ground connection；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
The three phases electronic energy meter of three kinds of voltage specifications is combined into one piece of table by the present invention, by Width funtion power-supply service, wide electric current power-supply service, software, hardware automatic discrimination phase three-wire three/three-phase and four-line mode of connection, the power utilization environment of three kinds of voltage specifications of self adaptation.Decrease the product specification of electric energy meter, be greatly reduced production difficulty and the management difficulty of manufacturing enterprise and user.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the flow chart of the self-adaptation control method of embodiment of the present invention three-phase electric energy meter.
Fig. 2 is the flow chart judging subprogram of the self-adaptation control method of embodiment of the present invention three-phase electric energy meter.
Fig. 3 is embodiment of the present invention 1-4 three-phase electric energy meter theory diagram.
Fig. 4 is the embodiment of the present invention 1 three-phase electric energy meter wiring diagram.
Fig. 5 is the embodiment of the present invention 2 three-phase electric energy meter wiring diagram.
Fig. 6 is the embodiment of the present invention 3 three-phase electric energy meter wiring diagram.
Fig. 7 is the embodiment of the present invention 4 three-phase electric energy meter wiring diagram.
[detailed description of the invention]
Embodiment of the present invention three-phase electronic adaptive electric energy meter as shown in Figure 3 is made up of voltage sampling circuit, current sampling circuit, power measurement and data processing unit, power supply management circuit, functional circuit etc., and power measurement and data processing unit include electric energy measuring management circuit CPU1 and high speed microprocessor CPU2.Three-phase electronic adaptive electric energy meter, except meritorious (idle) electric flux of metering, also has timesharing, measures the two or more functions such as requirement, be the electric energy meter that can show, store and export data.
After three-phase electronic adaptive electric energy meter in-site installation, three-phase alternating voltage UA UB UC access electric energy meter through binding post,
3 phase voltage sampled signal input electric energy measuring management circuit CPU1 are gathered through voltage sampling circuit.
Three-phase current, Ia1 (A phase current inlet wire), Ia2 (A phase current outlet), Ib1 (b phase current inlet wire), Ib2 (b phase current outlet), Ic1 (c phase current inlet wire), Ic2 (c phase current outlet) gather after 3 phase current signals through current sampling circuit, input electric energy measuring management circuit CPU1, carry out computing simultaneously, complete voltage, electric current, active power, the calculating of the data such as reactive power, active energy, reactive energy, power factor, high speed microprocessor CPU2 timing carries out communication with CPU1, gathers the CPU1 data calculated.Complete the metering of corresponding electric energy and corresponding voltage and current, active power, the accurately calculating further of the data such as reactive power.
CPU2 is for time-shared charge and processes various inputoutput datas, by serial paralled interface, energy data is read from A/D converter, and complete the metering of timesharing active energy according to the period set in advance. reactive energy measurement and maximum demand metering function, show each item data as required, carry out communication transfer by infrared or 485 interfaces, and completing the monitoring of operational factor, record stores various data.
Power supply management circuit completes three-phase alternating current and turns direct current 5V function of supplying power, for each circuit work of electric energy meter.And there is backup battery power supply management function, when externally fed power down, backup battery provides electric energy meter work through this circuit, complete to have a power failure show, the function such as check meter.
The present invention realizes phase three-wire three by three parts and with three-phase and four-line self adaptation and certainly differentiates design, it is achieved the automatic discrimination of high pressure gauge (3 × 57.7/100V, 3 × 100V) same to low-pressure meter (3 × 220/380V).
The connection box of electric energy meter martingale routinely of the scene of three-phase and four-line, the special handling of phase three-wire three scene.
| Binding post number | Symbol | Explanation | Inside connect |
| 1 | Ia1 | A phase current enters | A phase current sampling circuit the first end |
| 2 | UA | A phase voltage | A phase voltage sample circuit |
| 3 | Ia2 | A phase current goes out | A phase current sampling circuit the second end |
| 4 | Ib1 | B phase current enters | B phase current sampling circuit the first end |
| 5 | UB | B phase voltage | B phase voltage sample circuit |
| 6 | Ib2 | B phase current goes out | B phase current sampling circuit the second end |
| 7 | Ic1 | C phase current enters | C phase current sampling circuit the first end |
| 8 | UC | C phase voltage | C phase voltage sample circuit |
| 9 | Ic2 | C phase current goes out | C phase current sampling circuit the second end |
| 10 | UN | Zero line |
Embodiment of the present invention three-phase electronic adaptive electric energy meter embodiment 1 three-phase and four-line through voltage, current transformer access way as shown in Figure 4, an A winding of phase voltage transformer first termination A phase firewire, the second end ground connection；The input of the first termination A phase voltage sample circuit of A phase voltage transformer Secondary Winding, the second end ground connection；First termination B phase firewire of a B winding of phase voltage transformer, the second end ground connection；The input of the first termination B phase voltage sample circuit of B phase voltage transformer Secondary Winding, the second end ground connection；First termination C phase firewire of a C winding of phase voltage transformer, the second end ground connection；The input of the first termination C phase voltage sample circuit of C phase voltage transformer Secondary Winding, the second end ground connection；Zero line connects voltage sampling circuit reference edge；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；B phase current mutual inductor Secondary Winding first terminates the first end of B phase current sampling circuit, and second terminates the second end and the ground of B phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
Embodiment of the present invention three-phase electronic adaptive electric energy meter embodiment 2 three-phase and four-line through current transformer access way as shown in Figure 5, A phase firewire connects the input of A phase voltage sample circuit, B phase firewire connects the input of B phase voltage sample circuit, C phase firewire connects the input of C phase voltage sample circuit, and zero line connects voltage sampling circuit reference edge；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；B phase current mutual inductor Secondary Winding first terminates the first end of B phase current sampling circuit, and second terminates the second end and the ground of B phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
Embodiment of the present invention three-phase electronic adaptive electric energy meter embodiment 3 three-phase and four-line is directly accessed mode as shown in Figure 6, mains side A phase firewire connects the input of A phase voltage sample circuit and the first end of A phase current sampling circuit, the second terminating load side A phase firewire of A phase current sampling circuit；Mains side B phase firewire connects the input of B phase voltage sample circuit and the first end of B phase current sampling circuit, the second terminating load side B phase firewire of B phase current sampling circuit；Mains side C phase firewire connects the input of C phase voltage sample circuit and the first end of C phase current sampling circuit, the second terminating load side C phase firewire of C phase current sampling circuit；Mains side zero line connects voltage sampling circuit reference edge, and load-side zero line connects voltage sampling circuit reference edge.
Embodiment of the present invention three-phase electronic adaptive electric energy meter embodiment 4 phase three-wire three through voltage, current transformer access way as it is shown in fig. 7, an A winding of phase voltage transformer first termination A phase firewire, second termination B phase firewire；The input of the first termination A phase voltage sample circuit of A phase voltage transformer Secondary Winding, the second end ground connection；The input end grounding of B phase voltage sample circuit；First termination C phase firewire of a C winding of phase voltage transformer, the second termination B phase firewire；The input of the first termination C phase voltage sample circuit of C phase voltage transformer Secondary Winding, the second end ground connection；Voltage sampling circuit reference edge ground connection；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
As depicted in figs. 1 and 2, angle and three-phase voltage value mainly through three-phase voltage judge the self-adaptation control method of embodiment of the present invention three-phase electric energy meter.
Three phases electronic energy meter through three-phase voltage A/D sampling and computing, obtains the magnitude of voltage of three-phase and the voltage angle of three-phase through internal electric energy sample circuit.
From measuring principle: 3 × 57.7/100V and 3 × 220/380V is three-phase and four-line connection, the mode of connection is star fashion, and 3 × 100V is the phase three-wire three mode of connection, for triangular form mode.
So, first judge three-phase voltage angle, judge magnitude of voltage afterwards.
1. voltage angle judges:
After powering on, ammeter is defaulted as the three-phase and four-line mode of connection, and first judges voltage angle, mainly differentiates three-phase and four-line and the phase three-wire three mode of connection, it is judged that condition and method are as follows:
| Judge step | UAC (angle value) | UBC (angle value) | UAB (angle value) | Judged result |
| The first step | 220 degree～260 degree | 100 degree～140 degree | 100 degree～140 degree | Three-phase and four-line access type |
As when three-phase voltage not phase shortage, first determined whether level angle, as met upper table requirement, then it is judged to three-phase and four-line, otherwise enters second step and judge.
| Judge step | UAC (angle value) | UBC (angle value) | UAB (angle value) | Judged result |
| Second step | 100 degree～140 degree | 220 degree～260 degree | 220 degree～260 degree | Three-phase and four-line access type |
As second step meets upper table requirement, then it is judged to three-phase and four-line.
2. magnitude of voltage judges
According to the mode of connection that the first step tests out, determine whether to access voltage specification, if the first step can correctly judge it is three-phase and four-line access type, then next step just no longer judges the access way of phase three-wire three:
3. alarm
If condition above does not comply with, then it is assumed that do not judge plant-grid connection mode, ammeter audible alarm, liquid crystal has Err-FF prompting.
4. judge memory
Three-phase self adaptation electric energy meter of the present invention, adopts big table stern construction, possesses table tail-hood (i.e. table end cap) monitoring switch in structure and circuit design, and when end cap closure or openness, electric energy meter can detect relevant state by this on-off circuit.
This end cap switchs, and not only detection end cap is opened and record, and by this switch in conjunction with power-on and power-off testing circuit, it is achieved following steps:
Situation one: electric energy meter externally fed from powering on → have a power failure → power on, when this on-off circuit detects that end cap is always on, then electric energy meter detects automatically into metering method, and stores this detection record (3 × 57.7/100V, 3 × 100V, 3 × 220/380V).
Situation two: electric energy meter externally fed from powering on → have a power failure → power on, if detecting that end cap is opened during electric energy meter power down mode, when powering on, be directly entered metering method detection.
Situation three: electric energy meter has a power failure → powers on, when this on-off circuit detects that end cap closed in this stage always, and remains closed at power-up state, and in this situation, electric energy meter reads store-memory value automatically, and by last time, the metering method of memory value record continued metering.
That is, the result that storage judges is needed after determining the access way of three-phase electric energy meter, when electric energy meter powers on after having a power failure every time, when needing to judge to have a power failure, whether wiring end cover is opened, as wiring end cover was not turned on, then call original process program and quantitative model by the access way of the three-phase electric energy meter stored；As wiring end cover is opened, then need to determine again through the scope differentiating three-phase voltage between phases angle and the three-phase voltage value accessed the access way of three-phase electric energy meter, call process program and the quantitative model of correspondence according to the new three-phase electric energy meter access way judged
The beneficial effect that technical solution of the present invention is brought: three phases electronic energy meter is widely used in the various aspects of national economy at present, in the bid of the annual whole nation and the quantity installed ten million, as measurement instrument, it is divided into high pressure gauge (3 × 57.7/100V, 3 × 100V), low-pressure meter (3 × 220/380V), it is divided into phase three-wire three electronic electric energy meter and three-phase and four-line electronic electric energy meter from application angle, extends tens kinds of product specifications.
Electric company, as user, in the middle of bid and operation, is just divided into three kinds of specifications (3 × 57.7/100V, 3 × 100V, 3 × 220/380V) in voltage specification, can not be general under different field conditions.And the producer producing electric energy meter also will with the electric energy meter producing three kinds of voltage specifications according to client.Period relates to purchase bidding, scheduling and planning, inspection accumulating in the supply of material and user side, installs multiple links such as maintenance.
The three phases electronic energy meter of three kinds of voltage specifications is combined into one piece of table by the present invention, by Width funtion power-supply service, wide electric current power-supply service, software, hardware automatic discrimination phase three-wire three/three-phase and four-line mode of connection, the power utilization environment of three kinds of voltage specifications of self adaptation.Decrease the product specification of electric energy meter, be greatly reduced production difficulty and the management difficulty of manufacturing enterprise and user.
Claims (8)
1. the self-adaptation control method of a three-phase electric energy meter, it is characterized in that, by differentiating that the scope of three-phase voltage between phases angle and the three-phase voltage value accessed determines the access way of three-phase electric energy meter, access way according to three-phase electric energy meter calls process program and the quantitative model of correspondence, it is achieved 1 piece of three-phase electric energy meter adapts to the access environment of three-phase and four-line 3 × 57.7/100V, three-phase and four-line 3 × 220/380V or phase three-wire three 3 × 100V automatically；In three-phase voltage between phases angle 1 is between 220 ° to 260 °, other 2 between 100 ° to 140 ° or in three-phase voltage between phases angle 2 are between 220 ° to 260 °, other 1 between 100 ° to 140 °, then it is judged to three-phase and four-line access way, then the voltage carrying out three-phase and four-line judges；If can not meet, then carry out phase three-wire three 3 × 100V access way and judge；
The result of judgement is stored after determining the access way of three-phase electric energy meter, when powering on after having a power failure every time, when judging to have a power failure, whether wiring end cover is opened, as wiring end cover was not turned on, then calls original process program and quantitative model by the access way of the three-phase electric energy meter stored；As wiring end cover is opened, then determine the access way of three-phase electric energy meter again through the scope differentiating three-phase voltage between phases angle and the three-phase voltage value accessed, call process program and the quantitative model of correspondence according to the new three-phase electric energy meter access way judged；Three-phase electric energy meter adopts big table stern construction, possesses end cap monitoring switch, and when end cap closure or openness, three-phase electric energy meter can detect relevant state by end cap monitoring switch；Described end cap monitoring switch, not only detection end cap is opened and record, and by described end cap monitoring switch in conjunction with power-on and power-off testing circuit, it is achieved following steps:
Situation one: described three-phase electric energy meter externally fed is from the power failure that powers on, then to powering on, when described on-off circuit detects that end cap is always on, then three-phase electric energy meter detects automatically into metering method, and stores this detection record；
Situation two: described three-phase electric energy meter externally fed is from the power failure that powers on, then to powering on, if detecting that end cap is opened during described three-phase electric energy meter power down mode, is directly entered metering method detection when powering on；
Situation three: described three-phase electric energy meter has a power failure to powering on, when this end cap monitoring switch detects that end cap closed in this stage always, and remain closed at power-up state, in this situation, electric energy meter reads store-memory value automatically, and by last time, the metering method of memory value record continued metering.
2. the self-adaptation control method of three-phase electric energy meter according to claim 1, it is characterised in that in the voltage decision process of three-phase and four-line, has any one more than 130V in the three-phase voltage of access, is then judged to the access way of 3 × 220/380V；Three-phase voltage as accessed is respectively less than 70V, then be judged to the access way of 3 × 57.7/100V；As all do not met, then enter alarm condition.
3. the self-adaptation control method of three-phase electric energy meter according to claim 1, it is characterized in that, when carrying out phase three-wire three 3 × 100V access way and judging, if three-phase voltage is all between 70V and 130V, and above judge that voltage angle does not judge three-phase and four-line access way, be taken as phase three-wire three 3 × 100V access way；As being unsatisfactory for, then enter alarm condition.
4. the three-phase electric energy meter realizing self-adaptation control method described in claim 1, it is characterized in that, including power measurement and data processing unit, three-phase voltage sample circuit, three-phase current sample circuit, end cap open detection circuit and power circuit, described power circuit includes back-up source；The signal output part of three-phase voltage sample circuit and three-phase current sample circuit connects power measurement and data processing unit respectively, and end cap open detection circuit connects power measurement and data processing unit, including end cap monitoring switch；Described three-phase voltage sample circuit includes A phase voltage sample circuit, B phase voltage sample circuit and C phase voltage sample circuit；Described three-phase current sample circuit includes A phase current sampling circuit, B phase current sampling circuit and C phase current sampling circuit.
5. three-phase electric energy meter according to claim 4, it is characterised in that mains side A phase firewire connects the input of A phase voltage sample circuit and the first end of A phase current sampling circuit, the second terminating load side A phase firewire of A phase current sampling circuit；Mains side B phase firewire connects the input of B phase voltage sample circuit and the first end of B phase current sampling circuit, the second terminating load side B phase firewire of B phase current sampling circuit；Mains side C phase firewire connects the input of C phase voltage sample circuit and the first end of C phase current sampling circuit, the second terminating load side C phase firewire of C phase current sampling circuit；Mains side zero line connects voltage sampling circuit reference edge, and load-side zero line connects voltage sampling circuit reference edge.
6. three-phase electric energy meter according to claim 4, it is characterized in that, including A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor, A phase firewire connects the input of A phase voltage sample circuit, B phase firewire connects the input of B phase voltage sample circuit, and C phase firewire connects the input of C phase voltage sample circuit, and zero line connects voltage sampling circuit reference edge；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；B phase current mutual inductor Secondary Winding first terminates the first end of B phase current sampling circuit, and second terminates the second end and the ground of B phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
7. three-phase electric energy meter according to claim 4, it is characterized in that, including A phase voltage transformer, B phase voltage transformer, C phase voltage transformer, A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor, the first termination A phase firewire of an A winding of phase voltage transformer, the second end ground connection；The input of the first termination A phase voltage sample circuit of A phase voltage transformer Secondary Winding, the second end ground connection；First termination B phase firewire of a B winding of phase voltage transformer, the second end ground connection；The input of the first termination B phase voltage sample circuit of B phase voltage transformer Secondary Winding, the second end ground connection；First termination C phase firewire of a C winding of phase voltage transformer, the second end ground connection；The input of the first termination C phase voltage sample circuit of C phase voltage transformer Secondary Winding, the second end ground connection；Zero line connects voltage sampling circuit reference edge；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；B phase current mutual inductor Secondary Winding first terminates the first end of B phase current sampling circuit, and second terminates the second end and the ground of B phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
8. three-phase electric energy meter according to claim 4, it is characterised in that include A phase voltage transformer, C phase voltage transformer, A phase current mutual inductor and C phase current mutual inductor, the first termination A phase firewire of an A winding of phase voltage transformer, the second termination B phase firewire；The input of the first termination A phase voltage sample circuit of A phase voltage transformer Secondary Winding, the second end ground connection；The input end grounding of B phase voltage sample circuit；First termination C phase firewire of a C winding of phase voltage transformer, the second termination B phase firewire；The input of the first termination C phase voltage sample circuit of C phase voltage transformer Secondary Winding, the second end ground connection；Voltage sampling circuit reference edge ground connection；A phase current mutual inductor Secondary Winding first terminates the first end of A phase current sampling circuit, and second terminates the second end and the ground of A phase current sampling circuit；C phase current mutual inductor Secondary Winding first terminates the first end of C phase current sampling circuit, and second terminates the second end and the ground of C phase current sampling circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210119522.4A CN102680779B (en) | 2012-04-23 | 2012-04-23 | The self-adaptation control method of a kind of three-phase electric energy meter and three-phase electric energy meter |
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| CN104865428B (en) * | 2015-04-22 | 2017-06-16 | 成都天兴电气有限公司 | The automatic switching control equipment of three-phase three-wire electric energy meter and three-phase and four-line electric energy meter |
| CN104914302A (en) * | 2015-06-05 | 2015-09-16 | 宁波三星智能电气有限公司 | Voltage included angle-based electric energy meter voltage specification identification method |
| CN104950151A (en) * | 2015-07-10 | 2015-09-30 | 成都天兴电气有限公司 | Device for automatically switching three-wire and four-wire metering modes of three-phase electric energy meter |
| CN106843020B (en) * | 2015-12-03 | 2021-08-31 | 上海协同科技股份有限公司 | General power load management terminal |
| CN105548683A (en) * | 2015-12-11 | 2016-05-04 | 华立科技股份有限公司 | Three-phase electric meter |
| CN106249043A (en) * | 2016-07-19 | 2016-12-21 | 柳州龙辉科技有限公司 | A kind of single-phase electric energy measuring instruments |
| US11061055B2 (en) * | 2019-03-15 | 2021-07-13 | Analog Devices International Unlimited Company | Three-phase power meter monitoring for star and delta configurations |
| CN109975608A (en) * | 2019-03-22 | 2019-07-05 | 华立科技股份有限公司 | The power grid type judgement method of three-phase electric energy meter, device and system |
| CN112990676A (en) * | 2021-03-03 | 2021-06-18 | 国网河北省电力有限公司 | Method and device for remotely verifying type of three-phase electric energy meter in operation based on voltage information |
| CN118294873A (en) * | 2024-06-06 | 2024-07-05 | 青岛鼎信通讯股份有限公司 | Phenotype identification method, device equipment and computer readable storage medium of electric energy meter |
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