CN208076586U - Electrical energy measurement electricity anti-theft system - Google Patents
Electrical energy measurement electricity anti-theft system Download PDFInfo
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- CN208076586U CN208076586U CN201721292871.0U CN201721292871U CN208076586U CN 208076586 U CN208076586 U CN 208076586U CN 201721292871 U CN201721292871 U CN 201721292871U CN 208076586 U CN208076586 U CN 208076586U
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Abstract
The utility model discloses a kind of electrical energy measurement electricity anti-theft system, voltage, the current signal that alternating current is acquired using voltage sampling circuit, firewire current sampling circuit, neutral line current sample circuit are sent to MCU；When mains-supplied, directly supply electricity to have the function of that metering module MCU powers using city, and MCU is monitored 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, it is powered to MCU using backup battery, MCU closes built-in metering module, MCU wakes up built-in metering module every time t second, if the both less than 0.1A of firewire electric current and neutral line current, then continue to close metering module, if there is 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, and sampling precision is high, is entirely capable of meeting the requirement of 0.5 grade of measuring accuracy.
Description
Technical field
The utility model is related to Electric Energy Metering Technology fields, and in particular to a kind of electrical energy measurement electricity anti-theft system and electric energy
Measure electricity anti-theft method.
Background technology
With the relieving of the increase and national power sales of power demand, being 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 cover have monitoring, in table
The means of outer stealing are more and more, and disconnecting zero curve or firewire 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 to 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 103592483
B discloses a kind of system and method realized and remain to metering after electronic electric energy meter falls zero curve or phase line, the electronic type
Electric energy meter includes power supply unit, bleeder circuit, current divider, neutral line current mutual inductor and metering module MCU, the power supply list
Member, bleeder circuit, current divider and neutral line current mutual inductor signal acquisition terminal be connected with the phase line L of mains supply, zero curve N,
Its signal output end is connected with the corresponding signal input part of metering module MCU, and the system further includes power CT and power supply
Translation circuit, the power CT are sleeved on phase zero line loop, and for incuding utilization voltage, the signal of the power CT is defeated
Outlet is connected with the signal input part of power converting circuit, the signal output end and metering module of the power converting circuit
The sampled signal input of MCU is connected.When the utility model is used, regardless of power load after electric energy meter is removed by the user voltage
Size remains able to achieve the purpose that effectively to measure.
But this method has the following disadvantages：
CT incudes the electricity that utility grid is derived from power converting circuit, brings alternating current line loss, not energy-efficient；CT incudes and power supply
Translation circuit cost is larger, uneconomical.
Utility model content
The technical problems to be solved in the utility model is to solve above-mentioned the deficiencies in the prior art, provides a kind of power consumption that reduces
Electrical energy measurement electricity anti-theft system and electrical energy measurement electricity anti-theft method.
In order to solve above-mentioned the deficiencies in the prior art, the technical solution adopted in the utility model is：A kind of electrical energy measurement is anti-
Stealing system include voltage sampling circuit, firewire current sampling circuit, neutral line current sample circuit, with metering module function
MCU and low-power dissipation power supply manage circuit, the voltage sampling circuit, firewire current sampling circuit, neutral line current sample circuit
It is all connected with alternating current and the MCU with metering module function, the low-power dissipation power supply management circuit includes backup battery BT2, charging
Battery BT1, mains-supplied circuit and power supply switch unit, the backup battery BT2, rechargeable battery BT2 and mains-supplied electricity
Lu Junyu have metering module function MCU be connected supplies power for, the power supply switch unit for switch rechargeable battery BT1 with
The break-make of reserve battery BT2 and for select with metering module function MCU power supply.
Further, the low-power dissipation power supply management circuit further includes diode D1, diode D2, diode D3, three poles
The anode connection mains supply of pipe V1 and triode V2, diode D1, cathode connect Power Management Unit and rechargeable battery
BT1, diode D2 anodes connect mains supply, and cathode connects Power Management Unit and backup battery BT2, rechargeable battery BT1
Power Management Unit is then connected with backup battery BT2, the anode of diode D3 connects mains supply, cathode connecting triode V1's
The collector output current of emitter, triode V1 gives the MCU with metering module function to power, and the emitter of triode V2 connects
Rechargeable battery BT1 and backup battery BT2 are met, base stage connects Power Management Unit, and collector output current, which is given, has metering module
The MCU of function powers.
Further, the model HT5019 of the MCU with metering module function.
From above-mentioned technical proposal it can be seen that the utility model has the following advantages:By using low-power consumption MCU and with prison
The double cell pattern of keyholed back plate reason is effectively overcome using a rechargeable battery and a backup battery and is entered stealing for a long time
The problem of battery consumption falls after state, and rechargeable battery preferentially uses, and effectively prevents the problem of backup battery power consumption is failed,
Simultaneously because when firing current measures, sample frequency is fast, and sampling precision is high.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the fundamental diagram of the utility model；
Fig. 3 is that low-power dissipation power supply manages circuit in the utility model.
Specific implementation mode
It elaborates to specific embodiment of the present utility model below in conjunction with attached drawing.
As depicted in figs. 1 and 2, the electrical energy measurement electricity anti-theft system of the utility model, including voltage sampling circuit, firewire electricity
It flows sample circuit, neutral line current sample circuit, the MCU with metering module function and low-power dissipation power supply and manages circuit, it is described
Voltage sampling circuit, firewire current sampling circuit, neutral line current sample circuit are all connected with alternating current and with metering module functions
MCU, the low-power dissipation power supply management circuit includes that backup battery, rechargeable battery, charging circuit, mains-supplied circuit and power supply are cut
Circuit is changed, the backup battery, rechargeable battery and mains-supplied are connected with the MCU with metering module function, described to fill
Circuit connects rechargeable battery, and the power supply switch circuit is for switching the break-make of charging circuit and rechargeable battery and for selecting
Select the power supply of the MCU with metering module function.
As shown in figure 3, the low-power dissipation power supply management circuit further includes diode D1, diode D2, diode D3, three poles
Pipe V1 and triode V2, Power Management Unit can be a built-in SCM system, the anode connection alternating current of diode D1
Power supply, cathode connect Power Management Unit and rechargeable battery BT1, and diode D2 anodes connect mains supply, cathode connection electricity
Source control unit and backup battery BT2, rechargeable battery BT1 and backup battery BT2 then connect Power Management Unit, diode D3
Anode connection mains supply, the emitter of cathode connecting triode V1, the collector output current of triode V1, which is given, has meter
The MCU power supplies of functions of modules are measured, the emitter of triode V2 connects rechargeable battery BT1 and backup battery BT2, and base stage connects power supply
Administrative unit, collector output current give the MCU with metering module function to power.When VCC has voltage, VCC gives charging electricity
Pond BT1 charges, and Power Management Unit controls triode V1 at this time, and the voltage of VCC is supplied VCPU, when VCC decompressions, power supply pipe
Manage chip by comparing BT1 and BT2 voltage, when BT1 be higher than BT2 when, Power Management Unit by control triode V2,
The voltage of BT1 supplies VCPU, and when BT2 is higher than BT1, Power Management Unit supplies the voltage of BT2 by controlling triode V2
VCPU。
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 cannot 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 entering Hold patterns, 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-M0 CPU Core, 128K Flash+512bytes Information Block, 8K
SRAM
At high speed：It is inserted into 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, the RTC compensation of total temperature range are participated in without user software
RTC：External 32K low frequency crystals integrate resistance needed for crystal, capacitance.
Assist RTC：When external OSC crystal oscillators failure of oscillation, system can switch to internal low-frequency RC and obtain timing time
LCD：4COM, the LCD of 6COM, 8COM is supported to show that SEG interfaces could support up 43 sections
Power supply mode：Power source internal switches, and two power supplys of external VSYS and VBAT are powered respectively
Temperature sensors of high precision：In~+85 degree temperature range of -45 degree, temperature sensor consistency is better than positive and negative 1 degree
2 road hardware, 7816 function
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 supports 1*4,2*4,3*4, tetra- kinds of 4*4
Support I2C, SPI, TIMER CC&PWM
Metering module：Dynamic range 5000：1, it supports the measuring parameters such as active and reactive, apparent, virtual value, frequency, supports
Zero curve/firewire 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, had the function of metering module by the mains-supplied unit in low-power dissipation power supply management system
MCU provides power supply；Have the function of that metering module MCU monitoring managements unit is in idle condition and is held according to monitoring rechargeable battery
Amount is insufficient, and the switch opened in electric power management circuit charges to rechargeable battery, until capacity is full of (since battery has itself damage
Consumption, this process are in real time monitoring and cycle charging).
In use, acquiring the electricity of alternating current using voltage sampling circuit, firewire current sampling circuit, neutral line current sample circuit
Pressure, current signal are sent to MCU, metering module built in MCU；
When mains-supplied, directly supply electricity to have the function of that metering module MCU powers using city, and MCU is to rechargeable battery
Working condition and capacity are monitored, and rechargeable battery is in idle condition and when off-capacity, give rechargeable battery charging；
When supply voltage loss occurs in MCU input powers side, MCU closes 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 firewire electric current using electricity
Road and neutral line current sample circuit acquire firewire electric current and neutral line current respectively, and acquisition time continues 200ms, if firewire electric current
With the both less than 0.1A of neutral line current, then continue to close metering module, if there is electric current is more than 0.1A all the way, then according to sampled value
Big Current calculation apparent energy：I*UCONST is written to calculated value in constant active power register, after write-in,
Function of measuring module is closed, MCU goes successively to Hold patterns, and MCU will be always with the cumulative hair pulse of the constant power at this time
And cumulative electric energy, i.e. MCU meterings are in constant pattern, work is in Hold patterns.
When supply voltage loss occurs in MCU input powers side, has the function of the control power supply switching electricity of metering module MCU
Road is powered using rechargeable battery to MCU, after rechargeable battery power consumption, is powered to MCU using backup battery.
By using the low-power consumption MCU of square spring and the double cell pattern with monitoring management, when there is no stealing, at MCU
Under STOP patterns, Overall Power Consumption at this time only has 10uA, when there are stealing, 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
1200mAh backup batteries can be used continuously 6 years or more, effectively overcome battery consumption after entering stealing state for a long time
The problem of falling, and rechargeable battery preferentially uses, and the problem of backup battery power consumption is failed is effectively prevented, simultaneously because opening
When current measurement, sample frequency is fast, and sampling precision is high, is entirely capable of meeting the requirement of 0.5 grade of measuring accuracy.
Claims (3)
1. a kind of electrical energy measurement electricity anti-theft system, including voltage sampling circuit, firewire current sampling circuit, neutral line current sampling electricity
Road, the MCU with metering module function and low-power dissipation power supply manage circuit, the voltage sampling circuit, firewire current sample
Circuit, neutral line current sample circuit are all connected with alternating current 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, which are connected with the MCU with metering module function, to be supplied power for, the electricity
Source switch unit is used to switch the break-make of rechargeable battery BT1 and reserve battery BT2 and for selecting have the function of metering module
MCU power supply.
2. electrical energy measurement electricity anti-theft system according to claim 1, it is characterised in that：The low-power dissipation power supply manages circuit
Further include diode D1, diode D2, diode D3, triode V1 and triode V2, the anode connection alternating current of diode D1
Power supply, cathode connect Power Management Unit and rechargeable battery BT1, and diode D2 anodes connect mains supply, cathode connection electricity
Source control unit and backup battery BT2, rechargeable battery BT1 and backup battery BT2 then connect Power Management Unit, diode D3
Anode connection mains supply, the emitter of cathode connecting triode V1, the collector output current of triode V1, which is given, has meter
The MCU power supplies of functions of modules are measured, the emitter of triode V2 connects rechargeable battery BT1 and backup battery BT2, and base stage connects power supply
Administrative unit, collector output current give the MCU with metering module function to power.
3. electrical energy measurement electricity anti-theft system according to claim 2, it is characterised in that：It is described with metering module function
The model HT5019 of MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721292871.0U CN208076586U (en) | 2017-10-09 | 2017-10-09 | Electrical energy measurement electricity anti-theft system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721292871.0U CN208076586U (en) | 2017-10-09 | 2017-10-09 | Electrical energy measurement electricity anti-theft system |
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| Publication Number | Publication Date |
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| CN208076586U true CN208076586U (en) | 2018-11-09 |
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ID=64032757
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| CN201721292871.0U Active CN208076586U (en) | 2017-10-09 | 2017-10-09 | Electrical energy measurement electricity anti-theft system |
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Cited By (4)
| 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 |
| CN112067891A (en) * | 2020-09-02 | 2020-12-11 | 成都长城开发科技有限公司 | Electric quantity metering circuit and ammeter |
| CN113311206A (en) * | 2021-05-31 | 2021-08-27 | 宁波迦南智能电气股份有限公司 | Method for realizing sampling, power supply or electricity stealing judgment by current transformer |
-
2017
- 2017-10-09 CN CN201721292871.0U patent/CN208076586U/en active Active
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 |
| CN107607760B (en) * | 2017-10-09 | 2024-05-24 | 江阴长仪集团有限公司 | Electric energy metering anti-theft system and method thereof |
| 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 |
| CN108120950B (en) * | 2018-01-29 | 2021-08-31 | 宁波三星医疗电气股份有限公司 | Zero line electric energy meter detection and metering system and method |
| CN112067891A (en) * | 2020-09-02 | 2020-12-11 | 成都长城开发科技有限公司 | Electric quantity metering circuit and ammeter |
| CN112067891B (en) * | 2020-09-02 | 2023-09-08 | 成都长城开发科技股份有限公司 | Electric quantity metering circuit and ammeter |
| CN113311206A (en) * | 2021-05-31 | 2021-08-27 | 宁波迦南智能电气股份有限公司 | Method for realizing sampling, power supply or electricity stealing judgment by current transformer |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Electric energy metering electricity larceny prevention system and method thereof Effective date of registration: 20190517 Granted publication date: 20181109 Pledgee: Bank of Suzhou, Limited by Share Ltd, Wuxi branch Pledgor: Jianyin Changyi Group Registration number: 2019320010021 |