CN209446667U - A kind of Analysis of energy metering instrument of count by time sharing - Google Patents
A kind of Analysis of energy metering instrument of count by time sharing Download PDFInfo
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- CN209446667U CN209446667U CN201920040227.7U CN201920040227U CN209446667U CN 209446667 U CN209446667 U CN 209446667U CN 201920040227 U CN201920040227 U CN 201920040227U CN 209446667 U CN209446667 U CN 209446667U
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Abstract
A kind of Analysis of energy metering instrument of count by time sharing, it is related to measuring electric variable technical field, it is provided with information collection and communication output module, signal processing module, calculation process module, be additionally provided with period control circuit connection data processing unit, the analyzer can be applied to it is a kind of have valuate at times without meter expense.The utility model has the beneficial effects that: the utility model has the function of count by time sharing charging, under the premise of the actual power to secondary circuit is furtherd investigate, it proposes and a kind of novel remedies electricity method, electric energy meter is replaced in the utility model permission in the case where power supply line does not power off, and can accurately it add up without total power supply volume during table, facilitate it is subsequent remedy electricity to user, give up doubt existing for user, it is horizontal to improve good service.
Description
Technical field
The utility model relates to measure electric variable technical field, more particularly to a kind of Analysis of energy metering of count by time sharing
Instrument and its application method.
Background technique
For failure electric energy meter or superperiod electric energy meter, new electric energy meter need to be carried and replace field electric energy table,
Due to taking during meter replacement without meter, needs to carry out after the completion of meter replacement and remedy electricity work.
Traditional electric quantity compensating method is: recording the voltage before and after changing table, size of current to calculate average function during changing table
The time spent in rate records the power factor before and after changing table to calculate mean power factor, and record changes table, utilizes (Power x function
Rate factor × change the table time × stoichiometric point multiplying power) method obtain the electricity counted less during changing table.This calculation method utilizes
Mean power and average power factor are calculated, so the electricity obtained is actually an estimated value, and non-at-scene online
The practical electricity of (off line), especially when route multiplying power is very big, the difference with practical electricity can be very big.Certain customers are to meter
Amount unit is reflected to remedied electricity there are the idea of doubt, and the impression to work good service is had a greatly reduced quality.
By taking some hydropower station carries out 750kV drawing official line electric energy meter rotation work as an example, before and after replacement meter, maximum load is
132.24kW, minimum load 115.425kW, average load 123.83kW change table time-consuming 0.5 hour, and route multiplying power is
32000000.Therefore electricity such as is remedied by maximum load, 211.584 ten thousand kWh of electricity volume should be remedied；Such as electricity is remedied by minimum load
Amount, should remedy 184.68 ten thousand kWh of electricity volume；Electricity such as is remedied by average load, 198.132 ten thousand kWh of electricity volume should be remedied.
According to average load calculate it is resulting remedy electricity, resulting remedy differing for electricity with calculating according to highest or minimum load
Value, can reach 13.452 ten thousand kWh.So there are certain irrationalities for electricity obtained by such calculation method.
Summary of the invention
In view of the deficiencies of the prior art, the utility model provides Analysis of energy metering instrument and its application of a kind of count by time sharing
Method can accurately add up in new, old electric energy meter replacement process to need without power supply volume total during table, and during accurately calculating no table
Want the total electricity bill of pricing for segment.
The utility model provides a kind of Analysis of energy metering instrument of count by time sharing, and cabinet is the cuboid of fillet, internal
It is provided with information collection and communication output module (1), signal processing module (2), calculation process module (3)；
Information collection and communication output module (1) include voltage access interface (101), electric current access interface (103), electric current
Split-core type meter interface, pulse current interface, USB interface, cable interface, RS232 debugging interface；
Signal processing module (2) includes signal amplification circuit (201) and eight channel A/D analog to digital conversion circuits (202)；
Calculation process module (3) includes data processing unit STM32F(301), man-machine interface ARM system (303), key
Unit (302), display unit (304)；
Voltage access interface (101) connects resistor voltage divider circuit (102), connects eight channels through signal amplification circuit (201)
AD analog to digital conversion circuit (202), then data processing unit STM32F(301 is connected through period control circuit (4)), data processing list
First STM32F(301) connection man-machine interface ARM system (303)；Electric current access interface (103) connects CT sample circuit (104), warp
Signal amplification circuit (201) connects eight channel A/D analog to digital conversion circuits (202), then connects at data through period control circuit (4)
Manage cell S TM32F(301), data processing unit STM32F(301) connection man-machine interface ARM system (303)；Man-machine interface ARM
System (303) is connect with push-button unit (302) and display unit (304)；
Data processing unit STM32F(301) and eight channel AD analog to digital conversion circuits (202) between be provided with sampling time sequence
Control circuit, sampling time sequence control circuit connect impulse output circuit；Data processing unit STM32F(301) it is also connected with three tunnels
Voltage and three tunnel current zero comparison circuits；Data processing unit STM32F(301) also it is connect with signal amplification circuit (201).
It further include power supply module inside the analyzer, lithium battery power supply and external electricity is arranged in power supply module
Source socket, external power supply socket can be equipment power supply and be lithium battery charging, be additionally provided with charging indicator light, full pressure instruction
Lamp, under-voltage indicator light, fill power switch.
The resistor voltage divider circuit (102) is sampled using precision resistance, and CT sample circuit (104) is using active compensation electricity
Current transformer sampling.
Be provided in the analyzer operation interface voltage access interface (101) 3, ground wire voltage access interface 1,
Electric current access interface (103) 3, electric current pick out port 3,3, electric current split-core type meter interface, 1, pulse current interface, usb 1
A, cable interface 1, RS232 debugging interface 1.
The analyzer is only applicable to alternating current circuit, signal acquisition method are as follows: a cycle samples at 512 points, three-phase
Voltage, three-phase current signal synchronized sampling, often convert a data, and data processing unit all reads 6 from A/D chip in time
The data of road signal are simultaneously stored, after the completion of the conversion output of cycle, calculation process module begin to calculate three-phase voltage,
The electric parameters such as electric current, active power, reactive power, apparent energy, phase and frequency.
Calculation method of the calculation process module to the virtual value of voltage and current are as follows: calculate six road signals each 512
The quadratic sum of a waveform point data, then opens radical sign, calculates three-phase voltage, current effective value in conjunction with hardware parameter.
Calculation method of the calculation process module to active power and reactive power are as follows: calculate 6 voltage wave figurate numbers
Group and the point-to-point of current waveform array are multiplied and are added calculatings, and reactive power uses 90 degree of methods calculating of phase shift；
Wherein active power:
Pa=Ua1Ia1+Ua2Ia2+…+Ua512Ia512
Pb=Ub1Ib1+Ub2Ib2+…+Ub512Ib512
Pc=Uc1Ic1+Uc2Ic2+…+Uc512Ic512
Pz=Pa+Pb+Pc
Wherein reactive power:
Qa=Ua1Ia129+Ua2Ia130+…+Ua384Ia512+Ua385Ia1+…+Ua512Ia128
Qb=Ub1Ib129+Ub2Ib130+…+Ub384Ib512+Ub385Ib1+…+Ub512Ib128
Qc=Uc1Ic129+Uc2Ic130+…+Uc384Ic512+Uc385Ic1+…+Uc512Ic128
Qz=Qa+Qb+Qc
Calculation method of the calculation process module to apparent energy are as follows: using voltage effective value multiplied by current effective value
It is calculated；
Sa=UaIa；Sb=UbIb；Sc=UcIc；
Sz=Sa+Sb+Sc
Calculation method of the calculation process module to active energy and reactive energy are as follows: standard time clock base built in instrument
Standard adds up an active energy and reactive energy using 100mS；
Active energy (100ms)=PzT=Pz*100mS；
Reactive energy (100ms)=QzT=Qz*100mS；
Wherein active-power P z and reactive power Q z is the mean power in the 100mS time；
Total functional electric energy=PZ1T1+PZ2T2+PZ3T3+…+PZNTN
Total nonfunctional electric energy=QZ1T1+QZ2T2+QZ3T3+…+QZNTN
Calculation method of the calculation process module to spike Pinggu active energy and reactive energy are as follows: with sharp period electricity
It is illustrated for capable of calculating: assuming that T1Moment initially enters the sharp period, writes down total active energy P at current timeZ1With it is idle
Electric energy QZ1, the period be not finished before write down total active energy P in the hypocone period in real timeZ2With reactive energy QZ2, until T2When
Between terminate the sharp moment and enter other periods；Total electric energy calculation formula is as follows in the sharp period:
The sharp period adds up total active energy=PZ2–PZ1+ upper period accumulated after sharp period active energy；
The sharp period adds up total reactive energy=QZ2–QZ1+ upper period accumulated after sharp period reactive energy；
It is a kind of have valuate at times without meter charging method, comprising the following steps:
S01, old electric energy meter are connected by terminal box to the secondary side lead of power supply line and corresponding current transformer, benefit
With terminal box in power supply line Analysis of energy metering instrument in parallel；
S02 disconnects the connection between old electric energy meter and power supply line, while real-time accumulated by Analysis of energy metering instrument
Power supply volume；
New electric energy meter is accessed power supply line according to the connection type of old electric energy meter and starts real-time accumulated power supply volume by S03,
Analysis of energy metering instrument stops accumulative power supply volume simultaneously, obtain in new, old electric energy meter replacement process without power supply volume total during table；
S04, Analysis of energy metering instrument calculate new, old electric energy meter according to taximeter at times and without power supply volume total during table
In replacement process without total electricity bill during table；
S05 removes Analysis of energy metering instrument.
The step S02 is specific as follows: before old electric energy meter is changed, first passing through vectogram to check Analysis of energy metering instrument
The mode of connection it is whether correct；Then relevant parameter is inputted on Analysis of energy metering instrument；Corresponding by mobile terminal box is drawn
Piece removes old ammeter after cutting off the voltage circuit of old ammeter again, while by the corresponding scribing of mobile terminal box, and each electric current is mutual
Sensor is connected to Analysis of energy metering instrument, presses " beginning " key of Analysis of energy metering instrument, starts accumulative power supply volume.
The step S03 is specific as follows: after new electric energy meter thereto, by moving the corresponding scribing of terminal box,
New electric energy meter is connected to power supply line through terminal box, each current transformer is connected to new electric energy meter, while pressing electrical energy measurement
" stopping " key of analyzer stops accumulative power supply volume.
The utility model has the beneficial effects that: period control circuit is arranged in the utility model, analyzer timesharing is realized
The function of valuation charging proposes one kind under the premise of the utility model furthers investigate the actual power of secondary circuit
Novel to remedy electricity method, electric energy meter is replaced in the utility model permission in the case where power supply line does not power off, and by electricity
Can quantitative analysis instrument can accurately add up without total power supply volume during table, facilitate it is subsequent remedy electricity to user, give up user
It is horizontal to improve good service for existing doubt.
Detailed description of the invention
Fig. 1 is that block diagram is connected inside the utility model；
Fig. 2 is 2 junction box structure schematic diagram of the utility model embodiment
Fig. 3 is 2 three-phase and four-line power supply line of the utility model embodiment, terminal box, the connection schematic diagram of electric energy meter；
Fig. 4 is 2 three-phase and four-line power supply line of the utility model embodiment, electric energy meter, terminal box and Analysis of energy metering
The circuit connection diagram of instrument；
Fig. 5 is 2 phase three-wire three power supply line of the utility model embodiment, electric energy meter, terminal box and Analysis of energy metering
The circuit connection diagram of instrument；
In figure: where 1, information collection and communication output module, 101, voltage access interface, 102, resistor voltage divider circuit,
103, electric current access interface, 104, CT sample circuit, 2, signal processing module, 201, signal amplification circuit, 202, eight channel A/D
Analog to digital conversion circuit (202), 3, calculation process module, 301, according to processing unit STM32F, 302, push-button unit, 303, man-machine boundary
Face ARM system, 304, display unit；1c~21c is the number of the connecting terminal of terminal box upper end, and 1b~10b is terminal box
The number of scribing, 1a~13a are the number of the connecting terminal of terminal box lower end, and 1d~10d is the volume of the connecting terminal of electric energy meter
Number.
Specific embodiment
Embodiment 1, as shown in Figure 1, the utility model provides a kind of Analysis of energy metering instrument of count by time sharing, a kind of timesharing
The Analysis of energy metering instrument of valuation, cabinet are the cuboid of fillet, are internally provided with information collection and communication output module
(1), signal processing module (2), calculation process module (3)；
Information collection and communication output module (1) include voltage access interface (101), electric current access interface (103), electric current
Split-core type meter interface, pulse current interface, USB interface, cable interface, RS232 debugging interface；
Signal processing module (2) includes signal amplification circuit (201) and eight channel A/D analog to digital conversion circuits (202)；
Calculation process module (3) includes data processing unit STM32F(301), man-machine interface ARM system (303), key
Unit (302), display unit (304)；
Voltage access interface (101) connects resistor voltage divider circuit (102), connects eight channels through signal amplification circuit (201)
AD analog to digital conversion circuit (202), then data processing unit STM32F(301 is connected through period control circuit (4)), data processing list
First STM32F(301) connection man-machine interface ARM system (303)；Electric current access interface (103) connects CT sample circuit (104), warp
Signal amplification circuit (201) connects eight channel A/D analog to digital conversion circuits (202), then connects at data through period control circuit (4)
Manage cell S TM32F(301), data processing unit STM32F(301) connection man-machine interface ARM system (303)；Man-machine interface ARM
System (303) is connect with push-button unit (302) and display unit (304)；
Data processing unit STM32F(301) and eight channel AD analog to digital conversion circuits (202) between be provided with sampling time sequence
Control circuit, sampling time sequence control circuit connect impulse output circuit；Data processing unit STM32F(301) it is also connected with three tunnels
Voltage and three tunnel current zero comparison circuits；Data processing unit STM32F(301) also it is connect with signal amplification circuit (201).
It further include power supply module inside the analyzer, lithium battery power supply and external electricity is arranged in power supply module
Source socket, external power supply socket can be equipment power supply and be lithium battery charging, be additionally provided with charging indicator light, full pressure instruction
Lamp, under-voltage indicator light, fill power switch.
The resistor voltage divider circuit (102) is sampled using precision resistance, and CT sample circuit (104) is using active compensation electricity
Current transformer sampling.
Be provided in the analyzer operation interface voltage access interface (101) 3, ground wire voltage access interface 1,
Electric current access interface (103) 3, electric current pick out port 3,3, electric current split-core type meter interface, 1, pulse current interface, usb 1
A, cable interface 1, RS232 debugging interface 1.
The analyzer is only applicable to alternating current circuit, signal acquisition method are as follows: a cycle samples at 512 points, three-phase
Voltage, three-phase current signal synchronized sampling, often convert a data, and data processing unit all reads 6 from A/D chip in time
The data of road signal are simultaneously stored, after the completion of the conversion output of cycle, calculation process module begin to calculate three-phase voltage,
The electric parameters such as electric current, active power, reactive power, apparent energy, phase and frequency.
Embodiment 2, the utility model provide it is a kind of have valuate at times without meter charging method, comprising the following steps:
S01, using terminal box in power supply line an Analysis of energy metering instrument in parallel；
As shown in the figure: terminal box shares 7 groups of terminals and constitutes, and wherein current circuit has 3 connecting terminals with 3 groups, every group, often
Terminal is up and down an entirety, and left and right is to disconnect, and is attached or is disconnected with scribing between terminal.Voltage circuit is with 4 groups, often
Group has 3 connecting terminals, and every terminal is up and down an entirety, and left and right is connection, is to disconnect up and down, is carried out using scribing
It connects or disconnects.
Old electric energy meter is connected by terminal box to the secondary side lead of power supply line and corresponding current transformer, specifically such as
Under:
(A) each connecting terminal of electric energy meter is connected with the upper end connecting terminal of terminal box, and specific connection type is as follows: 1d
Connect 5c, 2d connection 2c, 3d connection 6c, 4d connection 11c, 5d connection 8c, 6d connection 12c, 7d connection 17c, 8d connection 14c, 9d
Connect 18c, 10d connection 20c；
(B) lower end of terminal box is connected with the secondary side lead of each current transformer, specific as follows: firewire U connection 1a,
Firewire V connection 5a, firewire W connection 8a, zero curve N connection 13a；The current transformer head end of firewire U, end are connected respectively
2a,4a；The current transformer head end of firewire V, end are connected respectively 6a, 8a；The current transformer head end of firewire W, end
It is connected respectively 10a, 12a.
(C) 1b, 4b, 7b, 10b are respectively the scribing of 4 groups of voltage circuits, and electric energy meter is connected when running；2b,3b,5b,6b,
8b, 9b are the scribing of 3 groups of current circuits, and 2b, 5b, 8b are connected when electric energy meter is run, and 3b, 6b, 9b are disconnected.
In this way, electric energy meter can calculate the power supply volume of three-phase and four-line power supply line.
Referring to Fig. 2 and Fig. 4, the specific connection type between Analysis of energy metering instrument and terminal box is specific as follows:
The input terminal of voltage u, v, w, n of Analysis of energy metering instrument are connected respectively to the terminals of terminal box lower end
Sub- 1a, 5a, 8a, 13a；Input (into) end of electric current Iu, Iv, Iw of Analysis of energy metering instrument are connected respectively to terminal box
Connecting terminal 4c, 10c, 16c of upper end；By the output end of electric current Iu, Iv, Iw of Analysis of energy metering instrument be connected respectively to
Connecting terminal 3a, 7a, 11a of terminal box upper end.
S02 disconnects the connection between old electric energy meter and power supply line, while real-time accumulated by Analysis of energy metering instrument
Power supply volume.
Specifically, before old electric energy meter is changed, the mode of connection for first passing through vectogram to check Analysis of energy metering instrument is
It is no correct；Then relevant parameter is inputted on Analysis of energy metering instrument, it is forward and reverse including each rate electricity shown on electric energy meter
Active input and output electricity (total, peak, flat, paddy), forward and reverse idle total electricity, mutual inductor ratio, current transformer no-load voltage ratio and again
Rate；By the corresponding scribing of voltage circuit in mobile terminal box, 1b, 4b, 7b, 10b are disconnected, the voltage circuit of old ammeter is cut off
Remove old ammeter (disconnecting the conducting wire on all connecting terminals of old ammeter) again afterwards；Pass through current circuit in mobile terminal box simultaneously
Corresponding scribing disconnects 2b, 5b, 8b, and 3b, 6b, 9b are connected, and so that each current transformer is connected to Analysis of energy metering instrument, presses
" beginning " key of Analysis of energy metering instrument starts accumulative power supply volume.
New electric energy meter is accessed power supply line according to the connection type of old electric energy meter and starts real-time accumulated power supply volume by S03,
Analysis of energy metering instrument stops accumulative power supply volume simultaneously, obtain in new, old electric energy meter replacement process without power supply volume total during table.
It is specific as follows: after new electric energy meter thereto, the corresponding scribing of voltage circuit in mobile terminal box, make 1b,
4b, 7b, 10b are connected, and the corresponding scribing of current circuit, connects 2b, 5b, 8b in mobile terminal box, and 3b, 6b, 9b are disconnected, and are made new
Electric energy meter is connected to power supply line through terminal box, and each current transformer is made to be connected to new electric energy meter, while pressing electrical energy measurement point
" stopping " key of analyzer stops accumulative power supply volume.
S04, Analysis of energy metering instrument calculate new, old electric energy meter according to taximeter at times and without power supply volume total during table
In replacement process without total electricity bill during table；It is spare can be previously entered Analysis of energy metering instrument for taximeter at times, works as electric energy
Quantitative analysis instrument is obtained without total power supply volume during conversing no table automatically according to taximeter at times after power supply volume total during table.
S05 removes Analysis of energy metering instrument.
Referring to Fig. 2 to Fig. 5, the utility model public affairs are can be used in power supply line either three-phase and four-line or phase three-wire three
Open without meter charging method, it is consistent in principle although not had in the specific mode of connection.
The utility model allows to replace electric energy meter in the case where power supply line is customer power supply, and relies on electrical energy measurement
Analyzer can accurately add up to facilitate the subsequent idea for remedying electricity there are doubt to user without total power supply volume during table,
It is horizontal to improve good service.
Claims (3)
1. a kind of Analysis of energy metering instrument of count by time sharing, it is characterised in that: cabinet is the cuboid of fillet, is internally provided with
Information collection and communication output module (1), signal processing module (2), calculation process module (3)；
Information collection and communication output module (1) include voltage access interface (101), electric current access interface (103), electric current split-core type meter
Interface, pulse current interface, USB interface, cable interface, RS232 debugging interface；
Signal processing module (2) includes signal amplification circuit (201) and eight channel A/D analog to digital conversion circuits (202)；
Calculation process module (3) includes data processing unit STM32F(301), man-machine interface ARM system (303), push-button unit
(302), display unit (304)；
Voltage access interface (101) connects resistor voltage divider circuit (102), connects eight channel AD moulds through signal amplification circuit (201)
Number conversion circuit (202), then data processing unit STM32F(301 is connected through period control circuit (4)), data processing unit
STM32F(301 man-machine interface ARM system (303)) are connected；Electric current access interface (103) connects CT sample circuit (104), through believing
Number amplifying circuit (201) connects eight channel A/D analog to digital conversion circuits (202), then connects data processing through period control circuit (4)
Cell S TM32F(301), data processing unit STM32F(301) connection man-machine interface ARM system (303)；Man-machine interface ARM system
System (303) is connect with push-button unit (302) and display unit (304)；
Data processing unit STM32F(301) and eight channel AD analog to digital conversion circuits (202) between be provided with sampling time sequence control
Circuit, sampling time sequence control circuit connect impulse output circuit；Data processing unit STM32F(301) it is also connected with three road voltages
With three tunnel current zero comparison circuits；Data processing unit STM32F(301) also it is connect with signal amplification circuit (201).
2. a kind of Analysis of energy metering instrument of count by time sharing according to claim 1, it is characterised in that: the analyzer
Inside further includes power supply module, and lithium battery power supply and external power supply socket, external power supply socket is arranged in power supply module
Can be equipment power supply and be lithium battery charging, be additionally provided with charging indicator light, completely press indicator light, under-voltage indicator light, fill power supply
Switch.
3. a kind of Analysis of energy metering instrument of count by time sharing according to claim 1, it is characterised in that: the resistance point
Volt circuit (102) is sampled using precision resistance, and CT sample circuit (104) is sampled using active compensation current transformer.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541300A (en) * | 2019-01-10 | 2019-03-29 | 国网青海省电力公司电力科学研究院 | A kind of the Analysis of energy metering instrument and its application method of count by time sharing |
| CN110907678A (en) * | 2019-12-16 | 2020-03-24 | 杭州海兴电力科技股份有限公司 | Rate electric energy compensation metering method for IR46 multi-core modular intelligent electric energy meter |
| CN112180159A (en) * | 2020-09-16 | 2021-01-05 | 绍兴文理学院元培学院 | Domestic electric power detector of intelligence |
-
2019
- 2019-01-10 CN CN201920040227.7U patent/CN209446667U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541300A (en) * | 2019-01-10 | 2019-03-29 | 国网青海省电力公司电力科学研究院 | A kind of the Analysis of energy metering instrument and its application method of count by time sharing |
| CN110907678A (en) * | 2019-12-16 | 2020-03-24 | 杭州海兴电力科技股份有限公司 | Rate electric energy compensation metering method for IR46 multi-core modular intelligent electric energy meter |
| CN112180159A (en) * | 2020-09-16 | 2021-01-05 | 绍兴文理学院元培学院 | Domestic electric power detector of intelligence |
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