CN108663561A - A kind of self-powered multifunctional electric meter - Google Patents
A kind of self-powered multifunctional electric meter Download PDFInfo
- Publication number
- CN108663561A CN108663561A CN201810765471.XA CN201810765471A CN108663561A CN 108663561 A CN108663561 A CN 108663561A CN 201810765471 A CN201810765471 A CN 201810765471A CN 108663561 A CN108663561 A CN 108663561A
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- CN
- China
- Prior art keywords
- mutual inductor
- supply current
- current mutual
- storage device
- energy storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention relates to a kind of self-powered multifunctional electric meters, including electric instrument ontology, it is provided with power input on electric instrument ontology, further include supply current mutual inductor and energy storage device, the first side winding of supply current mutual inductor is used to connect alternating current circuit, the first secondary winding connects the input terminal of energy storage device for electrical connection power input, second secondary winding power, and the output end of energy storage device is for being electrically connected power input.The present invention is by being arranged a supply current mutual inductor and energy storage device, two secondary windings of supply current mutual inductor are respectively for electrical connection power input and energy storage device, supply current mutual inductor is used to provide electric energy directly to multifunctional electric meter under normal circumstances, and when supply current mutual inductor cannot directly power, the energy storage device for being employed as stand-by power supply provides work energy to multifunctional electric meter, it ensure that the continual and steady operation of multifunctional electric meter, have the advantages of simple structure and easy realization.
Description
Technical field
The present invention relates to a kind of multifunctional electric meter more particularly to a kind of self-powered multifunctional electric meters.
Background technology
With the continuous development of power automation, application of the multifunctional electric meter on power distribution cabinet is more and more universal.It is existing
There is the structure connection diagram of multifunctional electric meter as shown in Figure 1, including electric instrument ontology, is set on the electric instrument ontology
It is equipped with the power input for connecting power supply, is also associated with collecting unit and display unit, for line voltage distribution, electricity
Stream information is acquired and shows.
Acquisition and monitoring for electricity, it is more although multifunctional electric meter brings prodigious convenience to us
Still there are prodigious problems for function electric instrument.Such as：The external power supply of multifunctional electric meter is not easy to look for；Also exist
When electric equipment operation, circuit primary side current is fluctuated with the fluctuation of load, and power supply instability, and especially line maintenance is negative
When carrying excision, multifunctional electric meter can not just obtain external power supply, will influence background monitoring system current information at this time
Acquisition and monitoring.
Invention content
The object of the present invention is to provide a kind of self-powered multifunctional electric meters, are supplied for solving multifunctional electric meter
The unstable problem of electricity.
In order to solve the above technical problems, the present invention provides a kind of self-powered multifunctional electric meter, including electric power instrument
Table ontology is provided with power input on the electric instrument ontology, further includes supply current mutual inductor and energy storage device, described
The first side winding of supply current mutual inductor is supplied for connecting alternating current circuit, the first secondary winding of the supply current mutual inductor
It is electrically connected the power input, the second secondary winding power of the supply current mutual inductor connects the defeated of the energy storage device
Enter end, the output end of the energy storage device is for being electrically connected the power input.
The beneficial effects of the invention are as follows：By the way that a supply current mutual inductor and energy storage device, supply current mutual inductance is arranged
Two secondary windings of device are respectively for the power input and energy storage device of electrical connection multifunctional electric meter, in normal condition
Under, work energy is provided directly to multifunctional electric meter using supply current mutual inductor, and when supply current mutual inductor is primary
In the case that side powers off, the energy storage device for being employed as stand-by power supply provides work energy to multifunctional electric meter, ensure that
The continual and steady operation of multifunctional electric meter, and have the advantages of simple structure and easy realization.
Further, in order to realize that energy storage is spare, the energy storage device includes AC/DC modules and inversion filter module, institute
The input terminal for stating AC/DC modules connects the second secondary winding of the supply current mutual inductor, the output end of the AC/DC modules
Connect the input terminal of the inversion filter module, the output end of the inversion filter module for being electrically connected the power input,
The output end of the AC/DC modules is connected with storage capacitor.
Further, in order to provide stand-by electric energy, the inversion filter module includes bridge type inverse module and LC filtering moulds
Block.
Further, electric energy reversely charging in order to prevent, is also associated between the output end and storage capacitor of the AC/DC modules
Counnter attack diode.
Description of the drawings
Fig. 1 is the structure connection diagram of existing multifunctional electric meter；
Fig. 2 is the structure connection diagram of the self-powered multifunctional electric meter of the present invention；
Fig. 3 is the circuit structure diagram of energy storage device；
Fig. 4 is the circuit diagram of inversion filter module.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing and specific implementation
The present invention will be described in further detail for example.
The present invention provides a kind of self-powered multifunctional electric meter, structural schematic diagram is as shown in Fig. 2, include electric power
Meter body is provided with power input on electric instrument ontology, and for receiving working power, electric instrument ontology is also associated with
Collected data are sent to electric power instrument by collecting unit and display unit, collecting unit for acquiring circuit voltage and current
Table ontology, and shown in display unit.
In order to realize power supply power supply, which exports power-supply service using secondary winding in current transformer,
Further include supply current mutual inductor and energy storage device.The secondary winding of the supply current mutual inductor includes the first secondary winding and the
Two secondary windings, that is, existing current transformer measurement winding and protective winding, the first secondary winding can be measure around
One of in group and protective winding, and second secondary winding then corresponds to another winding.Wherein, supply current mutual inductance
The first side winding of device connects alternating current circuit, for taking electricity from alternating current circuit.First secondary winding of supply current mutual inductor supplies
It is electrically connected the power input of multifunctional electric meter, the second secondary winding power of supply current mutual inductor connects energy storage device
Input terminal, the output end of energy storage device is for being electrically connected power input.
Wherein, in the present embodiment, it is desirable that the load capacity of the first secondary side winding of supply current mutual inductor is not less than
5VA, to ensure that load current of supply current mutual inductor first winding circuit in the 10% of specified CT no-load voltage ratios, is capable of providing
The enough startup electric energy of energy storage device.
Fig. 3 gives the circuit structure diagram of energy storage device (self-power supply device), which includes AC/DC modules and inverse
Become filter module, the input terminal of the AC/DC modules connects the second secondary winding of supply current mutual inductor, the AC/DC modules
Output end connects the input terminal of inversion filter module, and the output end of inversion filter module is for being electrically connected the electricity of multifunctional electric meter
The output end of source input terminal, the AC/DC modules is connected with storage capacitor C1.In the present embodiment, storage capacitor C1 can be stored
220V voltages.In order to prevent in the case where providing stand-by power supply, the electric energy in storage capacitor C1 is supplied back to AC/DC modules
Electricity is also associated with counnter attack diode D1 between the output end and storage capacitor of AC/DC modules.
As shown in figure 4, inversion filter module includes bridge type inverse module and LC filter modules, the bridge type inverse module is by work(
Rate switching tube K1, K2, K3 and K4 are constituted, and LC filter modules are made of inductance L1 and capacitance C4.During the work time, storage capacitor
The 220V electric energy of C1 storages is closed at by bridge type inverse module inversion, first switch K1 and switch K3, before inductance L1
Can be positive voltage there are one negative voltage, lower end；When switch K2 and switch K4 are closed at, one is had before inductance L1
A positive voltage, lower end are negative voltage；It ceaselessly converts in this way, obtains a series of rectangular wave, mould is then filtered by LC
Block filters to obtain smooth sine wave, and the power input that storage capacitor C1 is multifunctional electric meter thus may be implemented and supply
Electricity.
In the case of the alternating current circuit normal power-up that the first side winding of supply current mutual inductor is connected, supply current
First secondary winding the operation is stable of mutual inductor, using the first secondary winding of supply current mutual inductor directly to multifunction power
The power input of instrument is powered.Meanwhile the alternating current of the second secondary winding of supply current mutual inductor is by energy storage device
AC/DC module rectifications after, give storage capacitor C1 charging energy-storings.And connected when the first side winding of supply current mutual inductor
In the case of alternating current circuit power-off either the first secondary winding job insecurity of supply current mutual inductor, pass through control at this time
Inversion filter module is connected, and gives the electricity of multifunctional electric meter after inversion filters using the electric energy stored in storage capacitor C1
Source supplying power for input end.
The self-powered multifunctional electric meter of the present invention has the advantages of simple structure and easy realization, and can not only be multifunction power instrument
Table provides power supply, while being capable of providing the startup electric energy of energy storage device, and then ensures the continual and steady fortune of multifunctional electric meter
Row efficiently solves existing multifunctional electric meter external power supply and is not easy to look for either outer power voltage is unstable etc. to ask
Topic.
Claims (4)
1. a kind of self-powered multifunctional electric meter, including electric instrument ontology, electricity is provided on the electric instrument ontology
Source input terminal, which is characterized in that further include supply current mutual inductor and energy storage device, the primary side of the supply current mutual inductor
Winding for connecting alternating current circuit, the first secondary winding of the supply current mutual inductor for being electrically connected the power input,
The second secondary winding power of the supply current mutual inductor connects the input terminal of the energy storage device, the energy storage device it is defeated
Outlet is for being electrically connected the power input.
2. self-powered multifunctional electric meter according to claim 1, which is characterized in that the energy storage device includes
The input terminal of AC/DC modules and inversion filter module, the AC/DC modules connects the second secondary of the supply current mutual inductor
Winding, the output end of the AC/DC modules connect the input terminal of the inversion filter module, the output of the inversion filter module
End is connected with storage capacitor for being electrically connected the power input, the output end of the AC/DC modules.
3. self-powered multifunctional electric meter according to claim 2, which is characterized in that the inversion filter module packet
Include bridge type inverse module and LC filter modules.
4. self-powered multifunctional electric meter according to claim 2 or 3, which is characterized in that the AC/DC modules
Counnter attack diode is also associated between output end and storage capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765471.XA CN108663561A (en) | 2018-07-12 | 2018-07-12 | A kind of self-powered multifunctional electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765471.XA CN108663561A (en) | 2018-07-12 | 2018-07-12 | A kind of self-powered multifunctional electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108663561A true CN108663561A (en) | 2018-10-16 |
Family
ID=63774008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810765471.XA Withdrawn CN108663561A (en) | 2018-07-12 | 2018-07-12 | A kind of self-powered multifunctional electric meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108663561A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175563A (en) * | 2020-01-21 | 2020-05-19 | 江苏三希科技股份有限公司 | Electric power monitoring device and method for pollution source enterprise |
| CN114167127A (en) * | 2021-11-24 | 2022-03-11 | 镇江市丹高电器有限公司 | Self-powered current transformer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2824424Y (en) * | 2005-08-31 | 2006-10-04 | 北京伏安电气公司 | Multi-output terminal power for power supply of current transformer |
| CN203747501U (en) * | 2014-03-21 | 2014-07-30 | 河南理工大学 | Mine intrinsically-safe direct current uninterruptible power source |
| CN106707008A (en) * | 2016-12-27 | 2017-05-24 | 成都信息工程大学 | Electronic current transformer and working method thereof |
| CN107276212A (en) * | 2017-07-03 | 2017-10-20 | 国网山东省电力公司莱芜供电公司 | The computer room electric power system and computer room management system of based superconductive energy storage |
| CN107492950A (en) * | 2017-10-13 | 2017-12-19 | 上海阳顿电气制造有限公司 | A kind of UPS devices of uninterrupted power supply |
| CN208621675U (en) * | 2018-07-12 | 2019-03-19 | 河南森源电气股份有限公司 | Self-powered multifunctional electric meter |
-
2018
- 2018-07-12 CN CN201810765471.XA patent/CN108663561A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2824424Y (en) * | 2005-08-31 | 2006-10-04 | 北京伏安电气公司 | Multi-output terminal power for power supply of current transformer |
| CN203747501U (en) * | 2014-03-21 | 2014-07-30 | 河南理工大学 | Mine intrinsically-safe direct current uninterruptible power source |
| CN106707008A (en) * | 2016-12-27 | 2017-05-24 | 成都信息工程大学 | Electronic current transformer and working method thereof |
| CN107276212A (en) * | 2017-07-03 | 2017-10-20 | 国网山东省电力公司莱芜供电公司 | The computer room electric power system and computer room management system of based superconductive energy storage |
| CN107492950A (en) * | 2017-10-13 | 2017-12-19 | 上海阳顿电气制造有限公司 | A kind of UPS devices of uninterrupted power supply |
| CN208621675U (en) * | 2018-07-12 | 2019-03-19 | 河南森源电气股份有限公司 | Self-powered multifunctional electric meter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175563A (en) * | 2020-01-21 | 2020-05-19 | 江苏三希科技股份有限公司 | Electric power monitoring device and method for pollution source enterprise |
| CN114167127A (en) * | 2021-11-24 | 2022-03-11 | 镇江市丹高电器有限公司 | Self-powered current transformer |
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181016 |