CN202631626U - Multi-path collection system of intelligent electric meter - Google Patents
Multi-path collection system of intelligent electric meter Download PDFInfo
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- CN202631626U CN202631626U CN 201220288457 CN201220288457U CN202631626U CN 202631626 U CN202631626 U CN 202631626U CN 201220288457 CN201220288457 CN 201220288457 CN 201220288457 U CN201220288457 U CN 201220288457U CN 202631626 U CN202631626 U CN 202631626U
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- intelligent electric
- electric meter
- acquisition system
- energy metering
- metering module
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Abstract
The utility model belongs to the field of automation control in the electric power industry and particularly relates to a multi-path collection system of an intelligent electric meter and used for collecting three-phase electric parameter of multiple circuits. The system intelligent electric meter is formed by an electric energy metering module, a microprogrammed control unit (MCU), a storage unit, a communication port and a displayer. The system is characterized by comprising the intelligent electric meter, two groups of electronic switching switches, voltage transformers and current transformers. The voltage transformers and the current transformers are independently connected onto N circuits. The N voltage transformers are connected with the electric energy metering module through an electronic switching switch I, the N current transformers are connected with the electric energy metering module through an electronic switching switch II, and control pins of the electronic switching switch I and the electronic switching switch II are connected with a control pin of the MCU. The multi-path collection system has the advantages of being capable of collecting current and voltage values on each circuit simultaneously, wide in application range, capable of being applied to various power supply input occasions, simple in structure and simple in early-stage installation and back-stage maintenance and saving a large amount of device investment.
Description
Technical field
The utility model belongs to the power industry automation control area, is specifically related to a kind of multi pass acquisition system of intelligent electric meter.
Background technology
Power industry is a mainstay industry of national economy, and electric power is in critical role as a kind of specialty goods in market economy.Simultaneously along with the system reform of power industry, the operation and management of the electrical network commercialization of just progressively marching toward, the construction of electric energy metering system is also along with carrying out of electric power commercial operation developed.Gather, handle, store, add up the electricity volume of each power plant, the off line electric weight that interconnection closes stomion electric weight and each electricity consumption critical point during the electric energy metering system main task; For calculating and analysis provides master data; Along with the enforcement of electricity price charging at times, it is more outstanding that the importance of electric energy metering system also just seems simultaneously.
As shown in Figure 1; Electric flux for a plurality of three-phases loop is gathered, and traditional scheme is provided for gathering the mutual inductor of voltage and current usually on each loop, also can on each loop, be provided for measuring the module of electric flux simultaneously;, the electrical energy metering module in each loop is resent to ammeter after obtaining electric energy data; If need install 6 electrical energy metering modules additional when 6 loops are arranged, equipment investment is higher, and install and the equal trouble comparatively of maintenance.
Also has a kind of scheme; Measurement mechanism on each loop uses 4 three-phase tables such as three-phase current table, voltage table, electric energy meter and power meter, if need 24 three-phase tables when 6 loops are arranged so, installs comparatively complicated; And cost of investment is higher, does not meet enterprise and user's economic interests.
Summary of the invention
The purpose of the utility model is the weak point according to above-mentioned prior art; A kind of multi pass acquisition system of intelligent electric meter is provided; Through independent current transformer and the voltage transformer (VT) of inserting on each loop; Simultaneously between intelligent electric meter and described electric current, voltage transformer (VT), electronic switch I, II are set, and adopt the method for regularly switching each loop of poll to reach the purpose of each loop three-phase current of collection and voltage.
The object of the invention is realized being accomplished by following technical scheme:
A kind of multi pass acquisition system of intelligent electric meter; This acquisition system specifically is used to gather the three-phase electricity parameter in a plurality of loops; Described intelligent electric meter is made up of electrical energy metering module, MCU, memory, communication interface and display; It is characterized in that described acquisition system comprises intelligent electric meter, two groups of electronic switch and the voltage transformer (VT) summation current transformer that on N loop, independently inserts respectively; Wherein N said voltage transformer (VT) connects said electrical energy metering module through the electronic switch I; N current transformer connects described electrical energy metering module through the electronic switch II, and the control pin of said electronic switch I, II connects the control pin of said MCU.
Described communication interface adopts the RS-485 interface, and adopts MODBUS-RTU standard communication protocol to carry out external communication.
Described acquisition system has each way switch state of switch state input interface of monitoring.
Described acquisition system has a warning output terminal, in order to remind out-of-limit and switching value displacement incident.
The utility model has the advantages that intelligent electric meter can be monitored independently three-phase equipment electricity consumption situation of multichannel simultaneously, can gather more than 30 electric parameter on each loop, saved a large amount of equipment investments; The application scenario is wide, is applicable to the application scenario of multiple power supply input; System possesses data storage function, event recording function and statistical function, has at times function of measuring and alert event and function such as uploads automatically, has extremely excellent cost performance, and simultaneity factor is simple in structure, and the installation and the maintenance in later stage in early stage are comparatively easy.
Description of drawings
Fig. 1 gathers the classic method synoptic diagram of multiloop electric parameter for ammeter;
Fig. 2 gathers multiloop electric parameter system chart for the utility model intelligent electric meter;
Fig. 3 is the N road three-phase voltage input figure of the utility model;
Fig. 4 is the N road three-phase current input figure of the utility model;
Fig. 5 is the timing change-over switch synoptic diagram of the utility model;
Fig. 6 is the typical wiring figure of the utility model.
Embodiment
Through embodiment the utility model characteristic and other correlated characteristic are done further explain below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
Embodiment: as shown in Figure 2, the invention belongs to the power industry automation control area, be specifically related to a kind of multi pass acquisition system of intelligent electric meter, be used to gather the three-phase electricity parameter in a plurality of loops.This acquisition system specifically comprises intelligent electric meter, electronic switch I, II and independent current transformer and the voltage transformer (VT) that inserts each loop; Intelligent electric meter is made up of electrical energy metering module, MCU, memory, communication interface and display; A described N current transformer is through inserting the electrical energy metering module after the electronic switch I; A described N current transformer is through inserting described electrical energy metering module after the electronic switch II; The signal output part of said electronic switch links to each other with said electrical energy metering module, and the control pin with said MCU is connected with the control pin of electronic switch I, II in order to carry steering order simultaneously.
Described intelligent electric meter specifically is made up of electrical energy metering module, MCU, memory, communication interface and display.Wherein said electrical energy metering module is used to handle received three-phase electricity parameter and has function of measuring at times; Memory is used for the storage of recording events and data, storage capable of circulation 8 days; Communication interface adopts the RS-485 interface of band esd protection circuit, and adopts MODBUS-RTU standard communication protocol to carry out external communication; Display adopts the LCD LCDs, is used for video data and indicating operating status, the convenient installation and debugging.Described acquisition system has each way switch state of switch state input interface of monitoring, and this acquisition system has a warning output terminal simultaneously, in order to remind out-of-limit and switching value displacement incident.
Like Fig. 2,3,4, shown in 5; The method of work of this acquisition system is specific as follows: described electronic switch I, II are respectively applied for the current signal of switching multichannel and the voltage signal of multichannel; Switched conductive regularly in order under the control of MCU; Switch to second loop until N loop from first loop, be 1/N second (being that the metering time that each loop obtains is 1/N second) interval time of regularly switching; By the voltage transformer (VT) on the loop of switched conductive the voltage data that measures is imported in the electrical energy metering module (being the ammeter power chip) through the measuring voltage input end; Current transformer is imported the current data that measures in the electrical energy metering module through current input terminal; After the voltage and current data are sent to the electrical energy metering module; To carry out data processing through formula, the computing formula of electric weight is that (wherein U is the magnitude of voltage of collection to P=U*I*N*M/f, the current value of I for gathering; N is the electric weight way that ammeter can be gathered, and f is a frequency acquisition); Electric quantity data after calculating finishes will be delivered to from the data output on the electrical energy metering module in the MCU (being control chip) with each electric parameter data.For reaching acquisition precision, avoid big Acquisition Error, the frequency of poll is far longer than N, is that f=1/ (M*N) makes the time t=1/f that at every turn is polled to be about the Millisecond time such as frequency acquisition.
Electric parameter described in the utility model is specially three-phase alternating voltage, three-phase current (true rms measurement), total active power, reactive power, power factor, each single-phase power, frequency, total active electrical degree, idle electric degree, meritorious idle maximum demand and time of origin, electric weight etc. at times.
Be illustrated in figure 6 as the typical wiring of this acquisition system, two kinds of different power supply inputs are adopted in this wiring, and wherein terminal 49 adopts the input of civil power AC220 volt voltage signal, and terminal 51 adopts the input of oily machine AC220 volt voltage signal.Acquisition system in the present embodiment has 2 change-over switches; Switch the current signal of multichannel and the voltage signal of multichannel respectively; Even civil power is different with oily machine input voltage, we still can measure the electric weight of power supply, and promptly we can measure the electric weight of civil power and the electric weight of oily machine respectively.Expanded the application scenario so greatly, no longer be confined to measure distribution in the simple distribution line, the electrical measurement of power house different electrical power.Such as having oily machine and civil power, or also has the occasion of the multiple power supply input source of inverter.
Claims (4)
1. the multi pass acquisition system of an intelligent electric meter; This acquisition system specifically is used to gather the three-phase electricity parameter in a plurality of loops; Described intelligent electric meter is made up of electrical energy metering module, MCU, memory, communication interface and display; It is characterized in that described acquisition system comprises intelligent electric meter, two groups of electronic switch and the voltage transformer (VT) summation current transformer that on N loop, independently inserts respectively; Wherein N said voltage transformer (VT) connects said electrical energy metering module through the electronic switch I; N current transformer connects described electrical energy metering module through the electronic switch II, and the control pin of said electronic switch I, II connects the control pin of said MCU.
2. the multi pass acquisition system of a kind of intelligent electric meter according to claim 1 is characterized in that described communication interface adopts the RS-485 interface, and adopts MODBUS-RTU standard communication protocol to carry out external communication.
3. the multi pass acquisition system of a kind of intelligent electric meter according to claim 1 is characterized in that described acquisition system has each way switch state of switch state input interface of monitoring.
4. the multi pass acquisition system of a kind of intelligent electric meter according to claim 1 is characterized in that described acquisition system has a warning output terminal, in order to remind out-of-limit and switching value displacement incident.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220288457 CN202631626U (en) | 2012-06-19 | 2012-06-19 | Multi-path collection system of intelligent electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220288457 CN202631626U (en) | 2012-06-19 | 2012-06-19 | Multi-path collection system of intelligent electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631626U true CN202631626U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220288457 Expired - Lifetime CN202631626U (en) | 2012-06-19 | 2012-06-19 | Multi-path collection system of intelligent electric meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202631626U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063912A (en) * | 2013-01-06 | 2013-04-24 | 四川省电力公司达州电业局 | Electric energy metering device |
| CN103529289A (en) * | 2013-11-06 | 2014-01-22 | 江苏大唐国际吕四港发电有限责任公司 | Electric power collection system adopting communication managers |
| CN104280604A (en) * | 2014-11-06 | 2015-01-14 | 珠海格力电器股份有限公司 | Alternating current power testing device |
| CN106501761A (en) * | 2016-12-26 | 2017-03-15 | 烟台东方威思顿电气股份有限公司 | Three-phase intelligent electric-energy meter simulation detection system |
| CN115420942A (en) * | 2022-11-04 | 2022-12-02 | 浙江正泰物联技术有限公司 | Electric energy measuring device and power supply system |
| CN115442676A (en) * | 2022-07-11 | 2022-12-06 | 华能澜沧江水电股份有限公司 | Intelligent electric energy meter metering information acquisition system and acquisition method |
-
2012
- 2012-06-19 CN CN 201220288457 patent/CN202631626U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063912A (en) * | 2013-01-06 | 2013-04-24 | 四川省电力公司达州电业局 | Electric energy metering device |
| CN103529289A (en) * | 2013-11-06 | 2014-01-22 | 江苏大唐国际吕四港发电有限责任公司 | Electric power collection system adopting communication managers |
| CN103529289B (en) * | 2013-11-06 | 2016-09-28 | 江苏大唐国际吕四港发电有限责任公司 | Use the coulomb collection system of communication manager |
| CN104280604A (en) * | 2014-11-06 | 2015-01-14 | 珠海格力电器股份有限公司 | Alternating current power testing device |
| CN106501761A (en) * | 2016-12-26 | 2017-03-15 | 烟台东方威思顿电气股份有限公司 | Three-phase intelligent electric-energy meter simulation detection system |
| CN115442676A (en) * | 2022-07-11 | 2022-12-06 | 华能澜沧江水电股份有限公司 | Intelligent electric energy meter metering information acquisition system and acquisition method |
| CN115420942A (en) * | 2022-11-04 | 2022-12-02 | 浙江正泰物联技术有限公司 | Electric energy measuring device and power supply system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |