CN202975176U - Electrical load monitoring device and electrical load monitoring system - Google Patents
Electrical load monitoring device and electrical load monitoring system Download PDFInfo
- Publication number
- CN202975176U CN202975176U CN2012204437146U CN201220443714U CN202975176U CN 202975176 U CN202975176 U CN 202975176U CN 2012204437146 U CN2012204437146 U CN 2012204437146U CN 201220443714 U CN201220443714 U CN 201220443714U CN 202975176 U CN202975176 U CN 202975176U
- Authority
- CN
- China
- Prior art keywords
- load monitoring
- magnetic field
- unit
- power load
- monitoring device
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model provides an electrical load monitoring device which comprises the following components: a processor unit, a GPRS unit which is connected with the processing unit, and a magnetic field sensor which measures the primary-side magnetic field of a transformer. The processor unit acquires the magnetic field data which are transmitted by the magnetic field sensor, processes and compares with the apparent power of a load terminal, which is read through the GPRS unit, thereby realizing electrical load monitoring. The utility model further provides an electrical load monitoring system which comprises the electrical load monitoring device and a host computer server. Compared with the prior art in which a current transformer is sleeved on a power transmission line and power line switching-off is required in current measuring through the current transformer and power line switching-off is performed in mounting, the electrical load monitoring device and the electrical load monitoring system have the following advantages: capability of being mounted without electric power line switching-off, and no easy magnetic flux saturation.
Description
Technical field
The utility model relates to field of electrical equipment, relates more specifically to a kind of power load monitoring device, system.
Background technology
Existing electric energy metered system generally is comprised of metering mutual inductor and electric energy meter, and user's load is read by electric energy meter, but electric energy meter is very easily destroyed or repacking, and the load that causes reading not is actual load.So the apparatus and method that applied power that applied power by contrasting special change primary side and electric energy meter read realizes load monitoring occurred, but this need to become many models with classification of equipment according to load and the electric pressure of transmission line of electricity, Design and implementation all more complicated of getting up, and mounting means need to destroy former transmission line of electricity, and power supply department can be queried its practicality and security unavoidably.
The utility model content
Compared with prior art, the utility model has overcome to be measured electric current by current transformer in prior art and usually current transformer will be socketed on transmission line of electricity, needs to disconnect line of electric force and need cut off the power supply when installing, and magnetic flux is the shortcoming such as saturated easily, do not need the line of electric force outage to install, magnetic flux is difficult for saturated.The utility model proposes and measure primary side magnetic field and be converted to device, the system that the primary side current value realizes load monitoring.
The utility model provides a kind of power load monitoring device, comprising: the magnetic field sensor in processor unit and the GPRS unit that is connected with processor unit respectively and measuring transformer primary side magnetic field; Processor unit obtains the magnetic field data that magnetic field sensor transmits, after processing with the applied power of the negative control terminal that reads by the GPRS unit relatively, to realize the power load monitoring.
The power load monitoring device that the utility model provides, wherein said magnetic field sensor uses the single shaft coil design, is set in parallel in preset distance place, line of electric force below.
The power load monitoring device that the utility model provides, wherein said processor unit comprise that the analogue value with the magnetic field sensor collection converts the analog-digital converter of digital value to.
The power load monitoring device that the utility model provides, it comprises Short Message Service (SMS) unit, processor unit carries out exchanging of power load data by this unit and management of power use person's mobile phone.
The power load monitoring device that the utility model provides, it comprises storage unit, this storage unit is used for storage electricity consumption data and reads for processor unit.
The power load monitoring device that the utility model provides, it comprises clock unit, this clock unit is for the treatment of the clock setting of device unit.
The power load monitoring device that the utility model provides, wherein said processor unit adopt Cortex-M3 core A RM processor.
The utility model also provides a kind of power load monitoring system, comprises power load monitoring device of the present utility model and host computer server.
The power load monitoring system that the utility model provides, wherein said host computer server are handheld device or long-range main website.
The utility model is by utilizing the magnetic field collecting unit easy for installation, the advantage that need not to cut off the power supply and install, measure the magnetic field that specially becomes user's primary side transmission line of electricity, and obtain current value by magnetic field of the present utility model-current conversion method, realize the power load monitoring by the power of contrast primary side, secondary side again, the shortcomings such as the installation that has solved existing load monitoring device is complicated, user's acceptance is not high, and the power comparison method of first and second side that the utility model adopts can be monitored power load better, in time finds the multiplexing electric abnormality event.
Description of drawings
Fig. 1 is the example structure block diagram of power load monitoring device of the present utility model;
Fig. 2 is that magnetic field sensor of the present utility model and line of electric force are installed the embodiment schematic diagram.
Embodiment
The course of work of power load monitoring device of the present utility model is described below.Primary side magnetic field collecting unit gathers the field strength values around line of electric force, and institute's survey data are sent to processor unit, processor unit is processed these data, at first calculate corresponding primary current value, and further calculate applied power by transmission line of electricity electric pressure and the above-mentioned current value that calculates that presets; The simultaneous processor unit reads current value (secondary side current) and the applied power of negative control terminal by the GPRS unit.Processor unit records and compares the applied power of synchronization primary side and secondary side, when continuing for some time for example 15 minutes, when surpassing predetermined value (for example 30%), the difference between two applied power sends warning message on management of power use person's mobile phone or management platform, certain load imbalance of reporting to the police by the SMS unit.
Wherein, processor unit adopts Cortex-M3 core A RM processor, have low in energy consumption, speed fast, the characteristics of feature richness, mainly complete the reception of magnetic field data, the control of Short Message Service (SMS) unit, the processing of data and backup, the setting of clock, the control of GPRS.Processor unit carries analog-digital converter AD, converts the analogue value of magnetic field collecting unit collection to digital value.Processor unit calculates electric current by the magnetic field that collects, and further calculates actual electricity consumption applied power by the electric pressure value that is preset in processor.Every phase applied power equals line voltage (being electric pressure such as 10kV) and multiply by every phase phase current effective value, then divided by radical sign 3, as shown in Equation 1:
Wherein: P is applied power;
V is line voltage;
I is the current effective value of each phase.
Processor unit reads the negative control terminal data by the GPRS unit, be the secondary side data, and calculate the applied power of the special change electric terminal that reads then the difference of the applied power of calculating and primary side, when difference exceeds the line loss value, namely for example 30% of actual load namely think load imbalance.Processor unit crosses with being about to this information exchange the mobile phone that the SMS unit sends to management of power use person.Management of power use person's phone number is kept in storage unit by default mode.
Processor calculates primary side phase current, phase applied power every a schedule time (for example 15 minutes), read simultaneously phase applied power and the phase current of negative control terminal, interocclusal record load data on time after treatment afterwards, comprise the primary side phase current, the phase applied power, the phase current of the electric terminal that reads and applied power mutually, and clock information, and these data messages are kept in storage unit.When management of power use person need to check user's power information, can send request to the power load monitoring device by mobile phone or management platform, when the SMS unit receives this request, obtain the power load data by processor unit from storage unit, then be sent to management of power use person's mobile phone or management platform by the SMS unit.
Produce the electric field of alternation according to exchange current, the electric field of alternation produces magnetic field, will produce the magnetic field with curent change around line of electric force, like this as long as magnetic field sensor unit can be measured line of electric force magnetic field on every side near line of electric force.Processor unit just can calculate electric current on line of electric force according to the size in magnetic field.The method of wherein calculating electric current by magnetic field need to first be carried out magnetic field and demarcated, and scaling method is as follows:
1, magnetic field sensor unit is placed near variable current source, preset distance place that is separated by with it,
2, change current source output, measure the magnetic field size of magnetic field sensor present position with the standard Magnetic Field measuring instrument, and the recording magnetic field sensor output voltage,
3, execution in step 2 repeatedly, record current-magnetic field-magnitude of voltage,
4, with the electric current-magnetic field that obtains in regression analysis analytical procedure 3-voltage data, draw by the relation between measuring magnetic field and electric current, determine calibration coefficient.
This calibration coefficient is preset in storage unit, and the magnitude of voltage according to calibration coefficient and magnetic field sensor unit output can calculate actual current value.
This device does not need the transmission line of electricity outage when mounted, can use insulating bar that it is arranged on line of electric force and get final product.Wherein, magnetic field sensor unit is used the single shaft coil design, need not to be socketed on line of electric force, as long as be set in parallel in line of electric force below preset distance, as shown in Figure 2.
This mounting means has avoided traditional current transformer to survey electric current to be needed mutual inductor is socketed on transmission line of electricity, need cut off the power supply when needing to disconnect line of electric force and installation, and magnetic flux is easily saturated.And the magnetic field sensor unit of using the single shaft coil does not need the line of electric force outage to install, and magnetic flux is unsaturated.During installation, only need by insulating bar, the top snap ring of magnetic field collecting unit to be stuck on line of electric force and get final product.
Load monitoring device of the present utility model need not outage and installs, implement simple, convenient, more advanced, more novel than same device of the prior art, install saferly, practicality is stronger.
And load monitoring device of the present utility model can realize the collection of primary side magnetic field data, calculates the phase applied power according to magnetic field data, and reads secondary side phase applied power by the GPRS mode, by contrasting timely discovery multiplexing electric abnormality, the concurrent alarming information of delivering newspaper.
The utility model also provides a kind of power load monitoring system.This system is made of above-mentioned power load monitoring device and host computer server.The host computer server can be for example management of power use personnel's mobile phone or handheld device, it can also be the long-range main station system of Utilities Electric Co., the power load monitoring device can pass through its SMS unit and mobile communication, perhaps passes through the master station communication of GPRS unit and Utilities Electric Co..
Above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment, the utility model is had been described in detail, the those of ordinary skill in described field is to be understood that: still can modify or replace on an equal basis embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (9)
1. power load monitoring device comprises: the magnetic field sensor in processor unit and the GPRS unit that is connected with processor unit respectively and measuring transformer primary side magnetic field; It is characterized in that processor unit obtains the magnetic field data that magnetic field sensor transmits, after processing with the applied power of the negative control terminal that reads by the GPRS unit relatively, to realize the power load monitoring.
2. power load monitoring device according to claim 1, is characterized in that magnetic field sensor uses the single shaft coil design, is set in parallel in preset distance place, line of electric force below.
3. power load monitoring device according to claim 1, is characterized in that processor unit comprises that the analogue value with the magnetic field sensor collection converts the analog-digital converter of digital value to.
4. power load monitoring device according to claim 1 is characterized in that comprising the Short Message Service unit, and the mobile phone by Short Message Service unit and management of power use person communicates.
5. power load monitoring device according to claim 1, is characterized in that comprising the storage unit that reads for processor unit for storage electricity consumption data.
6. according to claim 1-5 described power load monitoring devices of any one, is characterized in that comprising clock unit, and this clock unit is for the treatment of the clock setting of device unit.
7. according to claim 1-5 described power load monitoring devices of any one, is characterized in that processor unit adopts Cortex-M3 core A RM processor.
8. a power load monitoring system, is characterized in that comprising the arbitrary described power load monitoring device of claim 1-7 and host computer server.
9. power load monitoring system according to claim 8, is characterized in that the host computer server is handheld device or long-range main website.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204437146U CN202975176U (en) | 2012-08-31 | 2012-08-31 | Electrical load monitoring device and electrical load monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204437146U CN202975176U (en) | 2012-08-31 | 2012-08-31 | Electrical load monitoring device and electrical load monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202975176U true CN202975176U (en) | 2013-06-05 |
Family
ID=48516234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204437146U Expired - Lifetime CN202975176U (en) | 2012-08-31 | 2012-08-31 | Electrical load monitoring device and electrical load monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202975176U (en) |
-
2012
- 2012-08-31 CN CN2012204437146U patent/CN202975176U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103674292A (en) | Temperature detecting method and apparatus for devices of transformer station | |
| CN204154825U (en) | A kind of alternating-current charging pile failure detector | |
| CN202676300U (en) | An intelligent wireless electric contact temperature monitoring device of an electric power distribution cabinet | |
| CN103453998A (en) | Self-energy-taking wireless temperature sensor and achieving method thereof | |
| CN103257281A (en) | Power-frequency electromagnetic environment real-time on-line monitoring system platform based on GPRS | |
| CN103617711A (en) | Wireless data acquisition device utilizing energy harvesting technology | |
| CN109917165A (en) | A kind of intelligent electricity anti-theft system | |
| CN202956429U (en) | Intelligent ammeter | |
| CN202676777U (en) | Anti-electricity-theft remote monitoring and management system | |
| CN202975176U (en) | Electrical load monitoring device and electrical load monitoring system | |
| CN203929246U (en) | Substation equipment temperature-detecting device | |
| CN202083753U (en) | Online monitoring and early warning device for real-time loss of transformers | |
| CN204256921U (en) | A kind of substation bus bar intelligent temperature measurement system with wireless networking function | |
| CN103473601A (en) | System and method for intelligently forecasting short-term loads of power transmission lines | |
| CN103675490B (en) | A kind of power load monitoring device, system and monitoring method thereof | |
| CN105004945A (en) | Power distribution network overhead line accurate load distribution on-line monitoring method and system | |
| CN103675716A (en) | Device, system and method for monitoring electrical load by measuring magnetic field | |
| CN201964961U (en) | Wireless temperature measurement system of the transformer substation | |
| CN204706959U (en) | Line loss monitoring navigation system | |
| CN202948079U (en) | Apparatus and system for electrical load monitoring | |
| CN203588032U (en) | Power generation efficiency monitoring device for base station | |
| CN202837523U (en) | Device and system monitoring electrical load through measuring magnetic field | |
| CN204241617U (en) | Energy-saving transmission line malfunction monitoring system | |
| CN202869661U (en) | Electric joint temperature measurement apparatus | |
| CN203705056U (en) | Self-induction type high-voltage contact wireless temperature measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |