CN106526267A - Single-phase intelligent electricity-stealing-prevention electric energy meter and method for reducing power consumption - Google Patents
Single-phase intelligent electricity-stealing-prevention electric energy meter and method for reducing power consumption Download PDFInfo
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- CN106526267A CN106526267A CN201611188804.4A CN201611188804A CN106526267A CN 106526267 A CN106526267 A CN 106526267A CN 201611188804 A CN201611188804 A CN 201611188804A CN 106526267 A CN106526267 A CN 106526267A
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- electric energy
- microprocessor
- energy meter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/24—Arrangements for avoiding or indicating fraudulent use
Abstract
The invention provides a single-phase intelligent electricity-stealing-prevention electric energy meter and a method for reducing power consumption. The electric energy meter comprises a microprocessor. A power supply module is electrically connected to the microprocessor. A lithium battery module is electrically connected to the power supply module. A periphery of the microprocessor is connected to a button input module, a memory module, an electric energy pulse output module, an infrared interface module, a LCD driving and display module, a voltage sampling circuit and a current sampling circuit. The current sampling circuit comprises a manganin shunt connected to input and output terminals of a live wire of the electric energy meter and a current transformer connected to input and output terminals of a zero wire of the electric energy meter. A voltage transformer is connected in series to the manganin shunt or is connected in series to the current transformer. Whether the live wire and the zero wire are interchanged or the zero wire or the live wire is missed, under the effect of the voltage transformer, metering can be performed so that a purpose of preventing electricity stealing is achieved.
Description
Technical field
The present invention relates to a kind of electric energy meter, specifically a kind of single-phase intelligent of transformer summation current transformer with voltage is thief-proof
Electric electric energy meter and its method for reducing power consumption.
Background technology
Electricity is used by resident as a kind of commodity, particularly more and more now with each electric appliances into family, the people
Power consumption increases severely, and is ordered about by economic interests, and stealing electricity phenomenon is also increasingly serious.Each corner generally existing of stealing in society,
Its behavior is widely present in countries and regions underdeveloped.Normal confession, electricity consumption order have also been upset in this behavior, more sternly
Jeopardize the safe and stable operation of electrical network and the public safety of society, or even the life and property peace for directly jeopardizing the people again
Entirely.Simultaneously anti-theft electricity technology is with the progress in epoch, the development of science and technology, and also in constantly being lifted, how effectively electricity theft prevention is
Put an important topic in face of power department technical staff.In addition to formulating fairly perfect anti-electricity-theft laws and regulations, most
It is exactly mainly to need a kind of with good anti-electricity-theft metering product, prevents stealing electricity phenomenon from technology and using on.
Ordinary electronic formula electric energy meter is researched and developed on the basis of than older mechanical electronic table, is mainly solved
The mechanical electronic table that the degree of accuracy of old-fashioned stem-winder metering is low and old-fashioned does not substantially possess at anti-electricity-theft aspect, once have
The so old-fashioned stem-winder of the mode of connection of artificial change electric energy meter substantially just loses function of measuring, and ordinary electronic formula electric energy
Table is exactly in order to avoid the change of circuit and the anti-electricity-theft electric energy meter that designs, and also has advantage on cost, it is adaptable to general
Resident uses.But with the development of technology, the means of stealing are also more and more higher, and ordinary electronic formula electric energy meter is for relatively higher
After electricity filching means are just helpless, such as live wire and zero line are exchanged and zero line grounding or zero line disconnect electric energy meter and do not measure
Stealing in the case of, then ordinary electronic formula electric energy meter does not just accomplish anti-stealing electricity function；If electric energy meter is in the process for using
Middle electric energy meter normally can not work on power, and such as zero line is input into and output all disconnects, i.e., zero line disappearance and in the case of carrying ground
Electric energy meter can not also be measured, and for the area of the normal power failures of Jing, electric energy meter needs the working time permanent, then be accomplished by considering
The anti-stealing electricity function of other modes.
The content of the invention
The present invention provides a kind of single-phase intelligent of transformer summation current transformer with voltage according to the deficiencies in the prior art and prevents
Stealing electric energy meter, with forward and reverse electric energy metrical, after either live wire is exchanged with zero line；Or zero line or live wire disappearance,
Anti-electricity-theft purpose is attained by the presence of voltage transformer, is protected the normal use of electric energy, is maintained the conjunction of electric energy
Method benefit.
Technical scheme：A kind of single-phase intelligent anti-electricity-theft electric energy meter of transformer summation current transformer with voltage,
Including microprocessor, power module is electrically connected with microprocessor, and lithium battery module is electrically connected with power module, described micro-
It is also associated with keyboard input module, memory module, electrical energy pulse output module, infrared interface module, LCD to drive around processor
Dynamic and display module and voltage sampling circuit and current sampling circuit,
The microprocessor for voltage sampling circuit and current sampling circuit collection signal processed and passed through
Memory module carried out result storage, carried out electric quantity metering parameter output by electrical energy pulse output module, by infrared
Interface module carries out infrared communication, is carried out result and shown by LCD drivings and display module with external device；
The power module is electrically connected with microprocessor, infrared interface module and voltage sampling circuit and is its power supply；
The lithium battery module connects power module for carrying out emergency service for electric energy meter；
The keyboard input module connects microprocessor for carrying out button operation to electric energy meter；
The memory module connects microprocessor for storing to the electric energy metrical information of electric energy meter；
The electrical energy pulse output module connection microprocessor is used for exporting electric energy meter electric quantity metering parameter, for electric energy
Table carries out calibration and remote meter reading；
The infrared interface module connection microprocessor is used for making electric energy meter carry out infrared communication with external device；
The LCD drives and display module connection microprocessor is used for showing electric energy meter metrical information and key information；
The voltage sampling circuit connection microprocessor and power module, power module provide electricity for voltage sampling circuit
Source, the information of voltage of voltage sampling circuit collection electric energy meter are simultaneously input in microprocessor；
The current sampling circuit includes manganese copper diverter and the company being connected on electric energy meter live wire input and output side
The current transformer being connected on electric energy meter zero line input and output side, voltage mutual inductor serial is on manganese copper diverter or connects
On current transformer, the manganese copper diverter is used for carrying out the collection of electric energy meter live wire current signal, and the current transformer is used
In carrying out electric energy meter neutral line current signals collecting, the voltage transformer is for having electricity in manganese copper diverter or current transformer
Produce voltage to power for electric energy meter when stream flows through；The voltage mutual inductor serial is on the brush wire of manganese copper diverter.
The power module includes PT and powers mu balanced circuit, and PT mu balanced circuits of powering are connected with voltage transformer.
PT mu balanced circuits of powering include the first audion and the second audion, and the base stage of the first audion connects micro- place
The output signal foot of reason device, the colelctor electrode of the first audion connect the base stage of the second audion, and the colelctor electrode of the second audion connects
Connect the input signal foot of microprocessor, the grounded emitter of the first audion and the second audion.
The method that a kind of single-phase intelligent anti-electricity-theft electric energy meter of transformer summation current transformer with voltage reduces power consumption, including
Following steps：
1) electric energy meter microprocessor power supply port voltage value is detected, it is micro- when the input voltage of supply port is less than setting value
Processor then thinks power down, and microprocessor enters power down process program；
2) power down process program mainly include to each preservation of device current state of electric energy meter, the storage of energy data and
I/O port is set to forbid output/shielding input, calls DP display processor that LCD is shown as total electricity continuously display；
3) microprocessor master clock source is switching to into low-frequency clock just after operation is completed more than and one is entered extremely
Circulation, mainly performs two simple steps in endless loop, one is whether detection microprocessor power supply port voltage value is higher than to set
Definite value, two is to reset timing microprocessor device；
4) when detect microprocessor power supply port voltage value higher than setting value prove main power source restore electricity, microprocessor
Device enters the endless loop of a do-nothing operation, into after the endless loop of do-nothing operation resets behaviour as microprocessor no longer performs intervalometer
Recovery normal work is restarted in reset rapidly to make then microprocessor.
The technique effect of the present invention：Manganese copper diverter carries out the collection of electric energy meter live wire current signal, and current transformer is carried out
Electric energy meter neutral line current signals collecting, voltage transformer produce electricity when manganese copper diverter or current transformer have electric current to flow through
Press and power for electric energy meter, after either live wire is exchanged with zero line, or zero line or live wire disappearance, in the presence of voltage transformer
Can be measured, be reached the purpose of electricity theft prevention, microprocessor can be carried out master clock according to the situation of change of supply voltage
The switching in source extends the physical life of electric energy meter to reduce the purpose of power consumption.
Description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is that PT of the present invention powers mu balanced circuit schematic diagram；
Fig. 3 is that linear load off zero of the invention is grounded electricity anti-stealing wiring schematic diagram；
Fig. 4 is cutoff linear load ground connection electricity anti-stealing wiring schematic diagram of the present invention；
Fig. 5 is low-power consumption processing routine schematic flow sheet of the present invention.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of single-phase intelligent anti-electricity-theft electric energy meter of transformer summation current transformer with voltage, including micro- place
Reason device 1, power module 2 are electrically connected with microprocessor 1, and lithium battery module 3 is electrically connected with power module 2, micro- place
Reason device 1 around be also associated with keyboard input module 4, memory module 5, electrical energy pulse output module 6, infrared interface module 7,
LCD drives and display module 8 and voltage sampling circuit 9 and current sampling circuit 10,
The microprocessor 1 for voltage sampling circuit 9 and current sampling circuit 10 collection signal processed simultaneously
Result storage is carried out by memory module 5, electric quantity metering parameter output is carried out by electrical energy pulse output module 6, is led to
Crossing infrared interface module 7 carries out infrared communication with external device, is carried out result and shown by LCD drivings and display module 8；
The power module 2 is electrically connected with microprocessor 1, infrared interface module 7 and voltage sampling circuit 9 and is supplied for which
Electricity；
The lithium battery module 3 connects power module 2 for carrying out emergency service for electric energy meter；
The keyboard input module 4 connects microprocessor 1 for carrying out button operation to electric energy meter；
The memory module 5 connects microprocessor 1 for storing to the electric energy metrical information of electric energy meter；
The connection of electrical energy pulse output module 6 microprocessor 1 is used for exporting electric energy meter electric quantity metering parameter, for electricity
Energy table carries out calibration and remote meter reading；
The connection of infrared interface module 7 microprocessor 1 is used for making electric energy meter carry out infrared communication with external device；
The LCD drives and the connection microprocessor 1 of display module 8 is used for showing electric energy meter metrical information and button letter
Breath；
The voltage sampling circuit 9 connects microprocessor 1 and power module 2, and power module 2 is carried for voltage sampling circuit 1
Power supply source, the information of voltage of the collection electric energy meter of voltage sampling circuit 9 are simultaneously input in microprocessor 1；
The current sampling circuit 10 include the manganese copper diverter 11 that is connected on electric energy meter live wire input and output side with
And the current transformer 12 being connected on electric energy meter zero line input and output side, voltage transformer 13 is connected on manganese copper diverter 11
Go up or be connected on current transformer 12, the manganese copper diverter 11 is used for carrying out the collection of electric energy meter live wire current signal, institute
Current transformer 12 is stated for carrying out electric energy meter neutral line current signals collecting, the voltage transformer 13 is in manganese copper diverter
11 or current transformer 12 produce voltage when having electric current to flow through and power for electric energy meter.
The voltage transformer 13 is connected on the brush wire of manganese copper diverter 11.
The power module 2 includes PT and powers mu balanced circuit, and PT mu balanced circuits of powering are connected with voltage transformer 13.
As shown in figure 3, live wire enters electric energy meter, live wire goes out electric energy meter to load, carrying ground, and electric energy meter disappearance zero line should
Mode be a fiery ground, zero line disappearance.Loop is formed with live wire by the earth after carrying ground, normal work meeting is now supported on
Load current is produced, as zero line is lacked, makes electric energy meter not by mains-supplied, general electric energy meter is in this case can not
Work, but the electric energy meter against shirking charge of intelligence of the present invention has electric current in this case through voltage transformer coil Jing magnetic induction
When can produce alternating voltage, after all wave rectification, be supplied to microprocessor and peripheral components to power, electric energy meter is remained to normally
Work and can accurate measurement it is active, can reach anti-electricity-theft purpose.
As shown in figure 4, zero line enters electric energy meter, zero line goes out electric energy meter to load, carrying ground, electric energy meter disappearance live wire, work
Make principle anti-electricity-theft with the linear load ground connection off zero shown in Fig. 3.
As shown in Fig. 2 the PT powers, mu balanced circuit includes the first audion Q5 and the second audion Q4, the first audion
The base stage of Q5 connects the output signal foot of microprocessor 1, and the colelctor electrode of the first audion Q5 connects the base stage of the second audion Q4,
The colelctor electrode of the second audion Q4 connects the input signal foot of microprocessor 1, and the first audion Q5's and the second audion Q4 sends out
Emitter grounding.
When there is civil power 220V to power, 15V is normal 15V voltages, and PwrDet is microprocessor output signal foot, is exported
For low level signal, the first audion Q5 is not turned on, and 15V voltages make the second audion Q4 ground levels be after R34, R35 partial pressures
High level and turn on, DL is input to microprocessor for low level, when microprocessor detect DL for low level when represent the circuit
It is working properly.When no mains-supplied, now powered with PT, then when 0.5A startups are done, 15V voltage ends can detect 5-
The voltage of 6V, now microprocessor starting working, then PwrDet is output as low level signal, the first audion Q5
Be not turned on, resistance R34, after R35 forms load, make 15V voltages second audion after partial pressure of discharging Q4 ground levels be made for high electricity
Put down and turn on, DL is input to microprocessor for low level, and being rapidly achieved makes the purpose of voltage transformer steady operation, and voltage is mutual
Sensor steady operation can just be continuously electric energy meter and provide stable power supply.
The electric energy meter of the present invention reduces power consumption of the electric energy meter under powering-off state using the mode of switching master clock source.Electricity
Energy table judges whether that power down is carried out by way of detecting microprocessor power supply voltage and whether reaching power down voltage.
The method that a kind of single-phase intelligent anti-electricity-theft electric energy meter of transformer summation current transformer with voltage reduces power consumption, including
Following steps：
1) electric energy meter microprocessor power supply port voltage value is detected, it is micro- when the input voltage of supply port is less than setting value
Processor then thinks power down, and microprocessor enters power down process program；
2) power down process program mainly include to each preservation of device current state of electric energy meter, the storage of energy data and
I/O port is set to forbid output/shielding input, calls DP display processor that LCD is shown as total electricity continuously display；
3) microprocessor master clock source is switching to into low-frequency clock just after operation is completed more than and one is entered extremely
Circulation, mainly performs two simple steps in endless loop, one is whether detection microprocessor power supply port voltage value is higher than to set
Definite value, two is to reset timing microprocessor device；
4) when detect microprocessor power supply port voltage value higher than setting value prove main power source restore electricity, microprocessor
Device enters the endless loop of a do-nothing operation, into after the endless loop of do-nothing operation resets behaviour as microprocessor no longer performs intervalometer
Recovery normal work is restarted in reset rapidly to make then microprocessor.
When the input voltage of the port is less than a certain setting value, microprocessor then thinks power down, by power loss indicator position position
And enter power down process program.Power down process program mainly includes preservation to each device current state of electric energy meter, energy data
Storage and I/O port is set to forbid output/shielding input, calls DP display processor that LCD is shown as total electricity simultaneously
It is continuously display, master clock source is switching to into low-frequency clock just after operation is completed more than and a while endless loop is entered,
Two simple steps are performed in endless loop mainly, one is whether to check power loss indicator by zero setting again, two is to be timed to feed
Canis familiaris L. operates.Proving when power loss indicator position being checked by zero setting again, main power source is restored electricity, then just allows program to enter one
The endless loop of individual do-nothing operation, into after the endless loop of do-nothing operation, as microprocessor no longer performs dog feeding operation, then microprocessor is fast
Reply immediately position and restart recovery normal work.After a power failure due to microprocessor run under low-frequency clock and perform it is simple to operate because
This power consumption is very little, and the output current of stand-by power supply maintains essentially in below 20 μ A.Due to realize low-power consumption process mode simultaneously
It is not to make microprocessor enter sleep pattern, therefore system can very easily and speed ground is extensive when main power source restores electricity
Normal operating conditions is arrived again.
A kind of single-phase intelligent anti-electricity-theft electric energy meter of the transformer summation current transformer with voltage of the present invention, when zero line or
Live wire disappearance makes electric energy meter without producing electric current when still having load in the state of mains-supplied, and electric current is through voltage transformer coil
Alternating voltage can be produced during Jing magnetic induction, be supplied to microprocessor and peripheral components to power use, battery after all wave rectification
Voltage is not provided now, so design substantially increases the service life of battery.
Live wire and zero line active energy can be measured, with forward and reverse electric energy metrical, reverse electricity counts positive electricity
Interior, accurate measurement is to 0.01kWh, while having real-time detection function, energy real-time current shows that realtime power shows, accuses in time
Tell that user's electric energy meter uses loading condition.
When the absolute value of live wire and zero line difference between currents between the two is more than 12.5%, and whole acc power is when being more than 40W, thief-proof
Electric display lamp is lighted, and reminds user's electric energy meter to be operated in current imbalance state, and it is relatively large that electric energy meter has actively been switched to electric current
Loop metering.
Disconnect in zero line or live wire, when not accessing electric energy meter, and electric energy meter is when having 0.5A and above load current to produce,
In the case of carrying ground can active electricity stealing preventive metering, make ammeter remain to normal work and can accurate measurement it is active, can reach anti-
Stealing purpose.
Claims (4)
1. a kind of single-phase intelligent anti-electricity-theft electric energy meter of transformer summation current transformer with voltage, including microprocessor, its feature
It is：Power module is electrically connected with microprocessor, and lithium battery module is electrically connected with power module, the microprocessor week
Enclose and be also associated with keyboard input module, memory module, electrical energy pulse output module, infrared interface module, LCD drivings and show
Module and voltage sampling circuit and current sampling circuit,
The microprocessor for voltage sampling circuit and current sampling circuit collection signal processed and pass through store
Device module carried out result storage, carried out electric quantity metering parameter output by electrical energy pulse output module, by infrared interface
Module carries out infrared communication, is carried out result and shown by LCD drivings and display module with external device；
The power module is electrically connected with microprocessor, infrared interface module and voltage sampling circuit and is its power supply；
The lithium battery module connects power module for carrying out emergency service for electric energy meter；
The keyboard input module connects microprocessor for carrying out button operation to electric energy meter；
The memory module connects microprocessor for storing to the electric energy metrical information of electric energy meter；
The electrical energy pulse output module connection microprocessor is used for exporting electric energy meter electric quantity metering parameter, for entering to electric energy meter
Row calibration and remote meter reading；
The infrared interface module connection microprocessor is used for making electric energy meter carry out infrared communication with external device；
The LCD drives and display module connection microprocessor is used for showing electric energy meter metrical information and key information；
The voltage sampling circuit connection microprocessor and power module, power module provide power supply for voltage sampling circuit, electricity
The information of voltage of pressure sample circuit collection electric energy meter is simultaneously input in microprocessor；
The current sampling circuit includes the manganese copper diverter being connected on electric energy meter live wire input and output side and is connected to
Current transformer on electric energy meter zero line input and output side, voltage mutual inductor serial is on manganese copper diverter or is connected on electricity
On current transformer, the manganese copper diverter be used for carry out electric energy meter live wire current signal collection, the current transformer be used for into
Row electric energy meter neutral line current signals collecting, the voltage transformer is for having electric current stream in manganese copper diverter or current transformer
Out-of-date generation voltage is powered for electric energy meter；
The voltage mutual inductor serial is on the brush wire of manganese copper diverter.
2. the single-phase intelligent anti-electricity-theft electric energy meter of a kind of transformer summation current transformer with voltage according to claim 1,
It is characterized in that：The power module includes PT and powers mu balanced circuit, and PT mu balanced circuits of powering are connected with voltage transformer.
3. the single-phase intelligent anti-electricity-theft electric energy meter of a kind of transformer summation current transformer with voltage according to claim 2,
It is characterized in that：PT mu balanced circuits of powering include the first audion and the second audion, the base stage connection of the first audion
The output signal foot of microprocessor, the colelctor electrode of the first audion connect the base stage of the second audion, the current collection of the second audion
Pole connects the input signal foot of microprocessor, the grounded emitter of the first audion and the second audion.
4. a kind of method that electric energy meter as described in claim 13 is arbitrary reduces power consumption, it is characterised in that including following step
Suddenly：
1) microprocessor power supply port voltage value is detected, microprocessor is then recognized when the input voltage of supply port is less than setting value
For power down, microprocessor is into power down process program；
2) power down process program is mainly included to each preservation of device current state of electric energy meter, the storage of energy data IO
Port is set to forbid output/shielding input, calls DP display processor that LCD is shown as total electricity continuously display；
3) microprocessor master clock source is switching to into low-frequency clock just after operation is completed more than and an endless loop is entered,
Two simple steps are performed in endless loop mainly, one is whether detection microprocessor power supply port voltage value is higher than setting value,
Two is to reset timing microprocessor device；
4) when detect microprocessor power supply port voltage value higher than setting value prove main power source restore electricity, microprocessor enters
Enter the endless loop of a do-nothing operation, into after the endless loop of do-nothing operation as microprocessor no longer performs intervalometer clear operation then
Microprocessor resets rapidly and restarts recovery normal work.
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| CN201611188804.4A CN106526267A (en) | 2016-12-21 | 2016-12-21 | Single-phase intelligent electricity-stealing-prevention electric energy meter and method for reducing power consumption |
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| CN201611188804.4A CN106526267A (en) | 2016-12-21 | 2016-12-21 | Single-phase intelligent electricity-stealing-prevention electric energy meter and method for reducing power consumption |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607760A (en) * | 2017-10-09 | 2018-01-19 | 江阴长仪集团有限公司 | Electric energy metrical electricity anti-theft system and its method |
| CN108120950A (en) * | 2018-01-29 | 2018-06-05 | 宁波三星医疗电气股份有限公司 | A kind of line electric energy meter detection metering system off zero and method |
| CN108181536A (en) * | 2018-01-24 | 2018-06-19 | 宁波大家小家网络科技有限公司 | A kind of intelligent monitor system for single-phase residential electricity consumption |
| CN108562791A (en) * | 2018-07-14 | 2018-09-21 | 苏州溥秋智能科技有限公司 | A kind of data acquisition device |
| CN110794188A (en) * | 2019-11-14 | 2020-02-14 | 浙江晨泰科技股份有限公司 | Anti-theft ammeter |
| CN111308192A (en) * | 2020-04-10 | 2020-06-19 | 浙江安防职业技术学院 | Zero line-falling electricity-stealing-prevention metering device based on reset-prevention device |
| CN113364110A (en) * | 2021-04-23 | 2021-09-07 | 深圳供电局有限公司 | Power supply method and power supply system |
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