CN107607760A - Electric energy metrical electricity anti-theft system and its method - Google Patents

Electric energy metrical electricity anti-theft system and its method Download PDF

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Publication number
CN107607760A
CN107607760A CN201710931152.7A CN201710931152A CN107607760A CN 107607760 A CN107607760 A CN 107607760A CN 201710931152 A CN201710931152 A CN 201710931152A CN 107607760 A CN107607760 A CN 107607760A
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China
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mcu
power
metering module
rechargeable battery
circuit
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CN201710931152.7A
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CN107607760B (en
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张晓东
闫书芳
朱国富
冯子蛟
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JIANYIN CHANGYI GROUP
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JIANYIN CHANGYI GROUP
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a kind of electric energy metrical electricity anti-theft system and electric energy metrical electricity anti-theft method, voltage, the current signal that civil power is gathered using voltage sampling circuit, live wire current sampling circuit, neutral line current sample circuit are sent to MCU;When mains-supplied, directly supply electricity to power with metering module function MCU using city, and MCU is monitored to the working condition and capacity of rechargeable battery, when there is supply voltage loss in MCU input powers side, power supply switch circuit is powered using rechargeable battery to MCU, after rechargeable battery power consumption, powered using backup battery to MCU, metering module built in MCU closings, MCU wakes up built-in metering module every second time t, if the both less than 0.1A of live wire electric current and neutral line current, then continue to close metering module, if electric current is more than 0.1A all the way, then according to the big Current calculation apparent energy of sampled value, function of measuring module is closed, sample frequency is fast, sampling precision is high, it is entirely capable of the requirement for meeting 0.5 grade of measuring accuracy.

Description

Electric energy metrical electricity anti-theft system and its method
Technical field
The present invention relates to Electric Energy Metering Technology field, and in particular to a kind of electric energy metrical electricity anti-theft system and electric energy metrical Electricity anti-theft method.
Background technology
With the increase of power demand and the relieving of national power sales, to be driven by economic interests, stealing is increasingly severe, Electricity filching means are also more and more changeable and hidden, due to present intelligent electric energy meter can the behavior of split table cover have monitoring, in table The means of outer stealing are more and more, and disconnecting zero line or live wire makes electric energy meter cisco unity malfunction be a kind of new stealing side Formula, and the common practice for solving this stealing mode is increase power CT and power converting circuit, is sensed by power CT Electric current provides power supply by power converting circuit to computation chip and management MCU again, if Authorization Notice No. is CN 103592483B Disclose it is a kind of realize that electronic electric energy meter falls the system and method that metering is remained to after zero line or phase line, described electronic type Electric energy meter includes power supply unit, bleeder circuit, current divider, neutral line current transformer and metering module MCU, described power supply list Phase line L, the zero line N of member, bleeder circuit, the signal acquisition terminal of current divider and neutral line current transformer with mains supply are connected, Its signal output part is connected with metering module MCU corresponding signal input part, and described system also includes power CT and power supply Translation circuit, described power CT are sleeved on phase zero line loop, and for sensing utilization voltage, described power CT signal is defeated Go out end with the signal input part of power converting circuit to be connected, the signal output part and metering module of described power converting circuit MCU sampled signal input is connected.The present invention is in use, regardless of electricity consumption load after electric energy meter is removed by the user voltage Remain able to reach the purpose effectively measured.
But this method has the following disadvantages:
CT senses the electricity that utility grid is derived from power converting circuit, brings civil power line loss, does not save;CT senses and power supply Translation circuit cost is larger, uneconomical.
The content of the invention
The technical problem to be solved in the present invention is that solve above-mentioned the deficiencies in the prior art, there is provided a kind of electric energy for reducing power consumption Measure electricity anti-theft system and electric energy metrical electricity anti-theft method.
In order to solve above-mentioned the deficiencies in the prior art, the technical solution adopted by the present invention is:A kind of electric energy metrical is anti-electricity-theft System includes voltage sampling circuit, live wire current sampling circuit, neutral line current sample circuit, the MCU with metering module function And low-power dissipation power supply management circuit, the voltage sampling circuit, live wire current sampling circuit, neutral line current sample circuit connect Civil power and the MCU with metering module function are connect, the low-power dissipation power supply management circuit includes backup battery BT2, rechargeable battery BT1, mains-supplied circuit and power supply switch unit, the backup battery BT2, rechargeable battery BT2 and mains-supplied circuit are equal Be connected with the MCU with metering module function and supply power for, the power supply switch unit be used for switch rechargeable battery BT1 with it is standby Battery BT2 break-make and the power supply for selecting the MCU with metering module function.
Further, the low-power dissipation power supply management circuit also includes diode D1, diode D2, diode D3, three poles Pipe V1 and triode V2, diode D1 positive pole connection mains supply, negative pole connection PMU and rechargeable battery BT1, diode D2 positive pole connect mains supply, negative pole connection PMU and backup battery BT2, rechargeable battery BT1 PMU is then connected with backup battery BT2, diode D3 positive pole connects mains supply, negative pole connecting triode V1's Emitter stage, triode V1 colelctor electrode output current give the MCU with metering module function to power, and triode V2 emitter stage connects Rechargeable battery BT1 and backup battery BT2, base stage connection PMU are met, colelctor electrode output current is had metering module The MCU power supplies of function.
Further, the model HT5019 of the MCU with metering module function.
A kind of electric energy metrical electricity anti-theft method:
Voltage, the electric current of civil power are gathered using voltage sampling circuit, live wire current sampling circuit, neutral line current sample circuit Signal is sent to MCU, metering module built in MCU;
When mains-supplied, directly supply electricity to power with metering module function MCU using city, and MCU is to rechargeable battery Working condition and capacity are monitored, and when rechargeable battery is in idle condition and off-capacity, are charged to rechargeable battery;
When there is supply voltage loss in MCU input powers side, MCU close built in metering module, into Hold patterns, MCU wakes up built-in metering module every time T, opens live wire electric current and is adopted respectively using circuit and neutral line current sample circuit Collecting live wire electric current and neutral line current, acquisition time continues 200ms, if the both less than 0.1A of live wire electric current and neutral line current, Continue to close metering module, if electric current is more than 0.1A all the way, then according to the big Current calculation apparent energy of sampled value, meter Calculation value is written in constant active power register, after write-in terminates, function of measuring module is closed, MCU goes successively to Hold Pattern, now MCU will be in constant pattern, work with the cumulative hair pulse of the constant power and cumulative electric energy, i.e. MCU meterings always Work is in Hold patterns.
When there is supply voltage loss in MCU input powers side, the control power supply switching electricity with metering module function MCU Road is powered using rechargeable battery to MCU, after rechargeable battery power consumption, is powered using backup battery to MCU.
Further, time interval T is 5 seconds, and the working frequency of metering module is 900kHz.
From above-mentioned technical proposal it can be seen that the present invention has advantages below:By using low-power consumption MCU and with monitoring pipe The double cell pattern of reason, when in the absence of stealing, MCU is under STOP patterns, and Overall Power Consumption now only has 10uA, works as presence During stealing, due to needing monitoring current to be measured, using a rechargeable battery and a backup battery, length is effectively overcome Time enters battery consumption the problem of falling after stealing state, and rechargeable battery preferentially uses, and effectively prevent backup battery consumption The problem of electricity failure, simultaneously because when firing current measures, sample frequency is fast, and sampling precision is high, is entirely capable of meeting metering essence Spend the requirement of 0.5s levels.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention;
The workflow diagram of Fig. 2 present invention;
Fig. 3 manages circuit for low-power dissipation power supply in the present invention.
Embodiment
The embodiment of the present invention is elaborated below in conjunction with accompanying drawing.
As described in Figure 1, electric energy metrical electricity anti-theft system of the invention, including voltage sampling circuit, live wire current sample electricity Road, neutral line current sample circuit, the MCU with metering module function and low-power dissipation power supply management circuit, the voltage sample Circuit, live wire current sampling circuit, neutral line current sample circuit are all connected with civil power and the MCU with metering module function, described Low-power dissipation power supply management circuit includes backup battery, rechargeable battery, charging circuit, mains-supplied circuit and power supply switch circuit, The backup battery, rechargeable battery and mains-supplied are connected with the MCU with metering module function, and the charging circuit connects Rechargeable battery is connect, the power supply switch circuit is by switching the break-make of charging circuit and rechargeable battery and based on selecting to have Measure the MCU of functions of modules power supply.
The low-power dissipation power supply management circuit also includes diode D1, diode D2, diode D3, triode V1 and three Pole pipe V2, PMU can be a built-in SCM systems, and diode D1 positive pole connects mains supply, and negative pole connects Meet PMU and rechargeable battery BT1, diode D2 positive poles connection mains supply, negative pole connect PMU with And backup battery BT2, rechargeable battery BT1 and backup battery BT2 then connect PMU, diode D3 positive pole connection city Power supply, negative pole connecting triode V1 emitter stage, triode V1 colelctor electrode output current are given with metering module function MCU powers, triode V2 emitter stage connection rechargeable battery BT1 and backup battery BT2, base stage connection PMU, collection Electrode output current gives the MCU with metering module function to power.When VCC has voltage, VCC charges to rechargeable battery BT1, this When PMU control triode V1, VCC voltage is supplied VCPU, when VCC decompressions, power management chip passes through ratio Compared with BT1 and BT2 voltage, when BT1 is higher than BT2, PMU supplies BT1 voltage by controlling triode V2 VCPU, when BT2 is higher than BT1, PMU supplies VCPU by controlling triode V2, BT2 voltage.
MCU with metering module function uses the HT5019 of Hi-Trend Technology's production, This MCU carries metering module, and chip shares 5 kinds of patterns:Normal mode, debugging mode, test pattern, Sleep patterns, Hold Pattern, the difference of Hold patterns and Sleep patterns be exactly under Hold patterns, LDO_1P5 and LDO_LowPower two be by User's control switch, digital LDO_LowPower power supplies are always on, but due to its low output driving ability (20- 30uA), cause in this condition, many digital function modules can not enable, and user is configurable to open the big output drive of big power consumption The LDO_1P5 of kinetic force come adapt to its application demand.In order to reduce the power consumption under Hold patterns, BOR_DET, VCC_DET moulds Block is opened by chip hardware timesharing.If it is enabled that system is configured with interruption before Hold patterns are entered, entering Hold patterns After corresponding interrupt event occurs, then chip can be caused to be waken up under Hold patterns, and enter corresponding interrupt handling routine.
Power consumption only has 3.7uA under Hold patterns.Metering module can be operated under normal, three low frequency, constant patterns, and Power consumption only increases 10uA or so under constant pattern.
Operating voltage range:2.2V~5.5V
Operating temperature range:- 45 DEG C~85 DEG C
Using ARM Cortex-M0CPU Core, 128K Flash+512bytes Information Block, 8K SRAM
At high speed:Insert waiting for CPU maximum operating frequency 39.32MHz
N-free diet method CPU maximum operating frequencies 19.66MHz
Low-power consumption:Lowest power consumption 3.7uA under Hold patterns
Lowest power consumption 2.9uA under Sleep patterns
RTC is compensated:Curve digital compensation built in RTC, total temperature scope RTC compensation participate in without user software
RTC:External 32K low frequency crystals, integrate resistance needed for crystal, electric capacity.
Aid in RTC:During outside OSC crystal oscillators failure of oscillation, system can switch to internal low-frequency RC and obtain timing time
LCD:4COM, 6COM, 8COM LCD is supported to show that SEG interfaces could support up 43 sections
Power supply mode:Power source internal switches, and outside two power supplys of VSYS and VBAT are powered respectively
Temperature sensors of high precision:In the degree temperature range of -45 degree~+85, temperature sensor uniformity is better than positive and negative 1 degree
The function of 2 road hardware 7816
Under normal mode, WDT modules can not close, and ensure system reliability service
Built in hardware AES/GHASH encryption/decryption algorithms
Built-in DMA functions
Built-in key scan function, support 1*4,2*4,3*4, tetra- kinds of 4*4
Support I2C, SPI, TIMER CC&PWM
Metering module:Dynamic range 5000:1, the measuring parameters such as active and reactive, apparent, virtual value, frequency are supported, are supported Zero line/live wire electricity stealing preventive metering, single-phase three-wire, support disconnected mutually anti-electricity-theft metering method, and continuous metering power consumption is excellent under the pattern In 650uA, DC measurement is supported
When mains-supplied, there is metering module function by the mains-supplied unit in low-power dissipation power supply management system MCU provides power supply;With metering module function MCU monitoring managements unit idle condition and appearance are according to rechargeable battery is monitored Amount deficiency, the switch turned on the power in management circuit charge to rechargeable battery, until capacity is full of (because battery has itself damage Consumption, this process are in monitoring and cycle charging in real time).
As shown in Fig. 2 the electric energy metrical electricity anti-theft method of the present invention
Voltage, the electric current of civil power are gathered using voltage sampling circuit, live wire current sampling circuit, neutral line current sample circuit Signal is sent to MCU, metering module built in MCU;
When mains-supplied, directly supply electricity to power with metering module function MCU using city, and MCU is to rechargeable battery Working condition and capacity are monitored, and when rechargeable battery is in idle condition and off-capacity, are charged to rechargeable battery;
When there is supply voltage loss in MCU input powers side, MCU close built in metering module, into Hold patterns, MCU wakes up built-in metering module every time T, and the working frequency of metering module is 900kHz, opens live wire electric current using electricity Road and neutral line current sample circuit gather live wire electric current and neutral line current respectively, and acquisition time continues 200ms, if live wire electric current With the both less than 0.1A of neutral line current, then continue to close metering module, if electric current is more than 0.1A all the way, then according to sampled value Big Current calculation apparent energy:I*UCONST, calculated value is written in constant active power register, after write-in terminates, Function of measuring module is closed, MCU goes successively to Hold patterns, and now MCU will be always with the cumulative hair pulse of the constant power And cumulative electric energy, i.e. MCU meterings are in constant pattern, work is in Hold patterns.
When there is supply voltage loss in MCU input powers side, the control power supply switching electricity with metering module function MCU Road is powered using rechargeable battery to MCU, after rechargeable battery power consumption, is powered using backup battery to MCU.
By using the low-power consumption MCU of square spring and the double cell pattern with monitoring management, when in the absence of stealing, at MCU Under STOP patterns, Overall Power Consumption now only has 10uA, when stealing be present, due to needing monitoring current to be measured, this When Overall Power Consumption be calculated as (0.2/5) * 920+ (4.8/5) * 15=51uA, use a 1800mAh rechargeable battery and one It 1200mAh backup batteries, can be used continuously more than 6 years, effectively overcome for a long time into battery consumption after stealing state The problem of falling, and rechargeable battery preferentially uses, and the problem of backup battery power consumption is failed is effectively prevent, simultaneously because opening During current measurement, sample frequency is fast, and sampling precision is high, is entirely capable of the requirement for meeting 0.5 grade of measuring accuracy.

Claims (5)

1. a kind of electric energy metrical electricity anti-theft system, including voltage sampling circuit, live wire current sampling circuit, neutral line current sampling electricity Road, the MCU with metering module function and low-power dissipation power supply management circuit, the voltage sampling circuit, live wire current sample Circuit, neutral line current sample circuit are all connected with civil power and the MCU with metering module function, it is characterised in that:The low-power consumption Electric power management circuit includes backup battery BT2, rechargeable battery BT1, mains-supplied circuit and power supply switch unit, the standby electricity Pond BT2, rechargeable battery BT2 and mains-supplied circuit are connected with the MCU with metering module function to be supplied power for, the electricity Source switch unit is used for the break-make for switching rechargeable battery BT1 and reserve battery BT2 and for selecting have metering module function MCU power supply.
2. electric energy metrical electricity anti-theft system according to claim 1, it is characterised in that:The low-power dissipation power supply manages circuit Also include diode D1, diode D2, diode D3, triode V1 and triode V2, diode D1 positive pole connection civil power Power supply, negative pole connection PMU and rechargeable battery BT1, diode D2 positive pole connection mains supply, negative pole connection electricity Source control unit and backup battery BT2, rechargeable battery BT1 and backup battery BT2 then connect PMU, diode D3 Positive pole connection mains supply, negative pole connecting triode V1 emitter stage, triode V1 colelctor electrode output current, which is given, has meter Measure the MCU power supplies of functions of modules, triode V2 emitter stage connection rechargeable battery BT1 and backup battery BT2, base stage connection power supply Administrative unit, colelctor electrode output current give the MCU with metering module function to power.
3. electric energy metrical electricity anti-theft system according to claim 2, it is characterised in that:It is described with metering module function MCU model HT5019.
A kind of 4. electric energy metrical electricity anti-theft method of electric energy metrical electricity anti-theft system using described in claims 3:
Voltage, the current signal of civil power are gathered using voltage sampling circuit, live wire current sampling circuit, neutral line current sample circuit It is sent to MCU, metering module built in MCU;
When mains-supplied, directly supply electricity to power with metering module function MCU using city, and work of the MCU to rechargeable battery State and capacity are monitored, and when rechargeable battery is in idle condition and off-capacity, are charged to rechargeable battery;
When supply voltage loss occurs in MCU input powers side, metering module built in MCU closings is every into Hold patterns, MCU Built-in metering module is waken up every time T, live wire electric current is opened and live wire is gathered using circuit and neutral line current sample circuit respectively Electric current and neutral line current, acquisition time continue 200ms, if the both less than 0.1A of live wire electric current and neutral line current, continue to close Metering module is closed, if electric current is more than 0.1A all the way, then according to the big Current calculation apparent energy of sampled value, calculated value is write Entering into constant active power register, after write-in terminates, function of measuring module is closed, MCU goes successively to Hold patterns, this When MCU will be in constant pattern with the cumulative hair pulse of the constant power and cumulative electric energy, i.e. MCU meterings always, work is in Hold patterns.
When supply voltage loss occurs in MCU input powers side, the control power supply switch circuit with metering module function MCU makes Powered to MCU with rechargeable battery, after rechargeable battery power consumption, powered using backup battery to MCU.
5. electric energy metrical electricity anti-theft method according to claim 4, it is characterised in that:Time interval T is 5 seconds, measures mould The working frequency of block is 900kHz.
CN201710931152.7A 2017-10-09 2017-10-09 Electric energy metering anti-theft system and method thereof Active CN107607760B (en)

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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
CN109470278A (en) * 2018-09-18 2019-03-15 中国电力科学研究院有限公司 A kind of metering aggregate-value of determining measuring equipment is in the method and system that increment is nought state
CN110082577A (en) * 2019-04-18 2019-08-02 中国电力科学研究院有限公司 It is a kind of for judging the diagnostic method and system of electricity-saving appliance electricity stealing
CN110988420A (en) * 2019-12-02 2020-04-10 深圳供电局有限公司 Anti-electricity-theft system and anti-electricity-theft control method
CN114113732A (en) * 2021-12-15 2022-03-01 杭州万高科技股份有限公司 Single-phase electric energy metering chip meeting anti-electricity-theft application of zero-line-dropping
CN114325085A (en) * 2021-12-30 2022-04-12 江苏林洋能源股份有限公司 Electric energy meter and method supporting dynamic energy consumption management

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