CN202372592U - Electric energy quality monitoring instrument - Google Patents
Electric energy quality monitoring instrument Download PDFInfo
- Publication number
- CN202372592U CN202372592U CN2011205415027U CN201120541502U CN202372592U CN 202372592 U CN202372592 U CN 202372592U CN 2011205415027 U CN2011205415027 U CN 2011205415027U CN 201120541502 U CN201120541502 U CN 201120541502U CN 202372592 U CN202372592 U CN 202372592U
- Authority
- CN
- China
- Prior art keywords
- electric energy
- display screen
- converter
- energy quality
- data
- 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 - Fee Related
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to an electric energy quality monitoring instrument, which comprises a power module, a data acquisition module, an operational amplifier, an analog/digital conversion chip, a control chip and a display screen, wherein the output end of the data acquisition module is connected with the operational amplifier; the operational amplifier is connected with the control chip through the analog/digital conversion chip; and the control chip is connected with the display screen. Compared with the prior art, the electric energy quality monitoring instrument has the advantages of high data monitoring precision, high adaptability, high functionability, low power consumption, convenience in mounting and the like.
Description
Technical field
The utility model relates to a kind of electric energy detection correlation technique, especially relates to a kind of electric energy quality monitor.
Background technology
The quality of power supply (Power Quality) says that from the strictness meaning leading indicator of weighing the quality of power supply has voltage, frequency and waveform.Say from universal significance to be meant quality supply, comprise quality of voltage, electric current quality, power supply quality and use electricity quality.It can be defined as: cause the deviation of voltage, electric current or the frequency of consumer fault or cisco unity malfunction, its content comprises frequency departure, voltage deviation, voltage fluctuation and flicker, three-phase imbalance, temporary transient or transient overvoltage, wave form distortion (harmonic wave), voltage dip, interruption, rises and power supply continuity etc. temporarily.
Along with the raising of development and national economy and people's lives, the requirement of the quality of power supply is improved constantly, the requirement of quality of power supply standard is also being improved constantly.In recent years, country has issued a collection of quality of power supply standard, has adapted to the requirement of both sides of supply and demand in production run basically.
Before, what the dynamometer instrument meter in the industry was mainly measured all is voltage, these master datas of electric current, can not effectively monitor power quality datas such as three-phase imbalance in the electric system, system harmonics analysis, voltage fluctuation and flicker.Therefore can not do a perfect analysis to the system situation in the electrical network.
The utility model content
The purpose of the utility model is exactly for the defective that overcomes above-mentioned prior art existence a kind of data monitoring precision height, adaptive faculty electric energy quality monitor strong, powerful, low in energy consumption, easy for installation to be provided.
The purpose of the utility model can realize through following technical scheme:
A kind of electric energy quality monitor is characterized in that, comprises power module, data acquisition module, operational amplifier, A/D conversion chip, control chip and display screen; The output terminal of described data acquisition module is connected with operational amplifier, and described operational amplifier is connected with control chip through the A/D conversion chip, and described control chip is connected with display screen;
Described data collecting module collected foreign current and voltage data; Behind the operational amplifier signal condition, be transferred to the A/D conversion chip; After converting thereof into digital signal, this A/D conversion chip is transferred to control chip; Control chip continues to calculate power quality data to the data that receive, and when display screen need show, control chip sent to display screen with corresponding power quality data and shows.
Described power module comprises AC/DC converter and DC/DC converter; The input end of described AC/DC converter is connected with external ac power source; The output terminal of described AC/DC converter is connected with input end, the display screen of DC/DC converter respectively, and the output terminal of described DC/DC converter is connected with operational amplifier, A/D conversion chip respectively.
Described data acquisition module comprises the voltage transformer (VT) summation current transformer.
Described control chip comprises DSP, ARM, storer and extends out communication interface; The power input of described DSP is connected with the AC/DC converter; The signal output part of described DSP is connected with ARM, described ARM respectively with storer, extend out communication interface and be connected;
Described DSP converts the electric current and voltage digital signal that receives to various power quality datas, and sends the data to ARM, described ARM with the data that receive pack, subpackage, storage, and the data after will handling are uploaded through extending out communication interface.
The described communication interface that extends out comprises 232 communication interfaces, 485 communication interfaces, CAN EBI, USB interface and Ethernet interface, and described 232 communication interfaces are connected with display screen.
Described power quality data comprises three-phase imbalance data, frequency analysis data and voltage fluctuation and flicker data.
Described storer comprises the SD card memory of Flash storer and outside straight cutting.
Described display screen is the touch LCD display screen, and this touch LCD display screen can show that real time data interface, frequency analysis interface, the quality of power supply are counted interface, waveform display interface, histogram display interface, data download the interface and parameter is provided with the interface.
Described voltage transformer (VT) is an isolated voltage transformer, and described current transformer is for isolating current transformer.
Compared with prior art, the utlity model has following advantage:
1, high-precision data-switching; The utility model adopts the A/D converter chip of 16 6 passages and the operational amplifier that error is merely ppt; Operational amplifier is passed through in data acquisition; Be transferred to high-precision A/D conversion chip again, and finally pass through to calculate accurate data by control chip;
2, the ability of adaptation site environment is strong, and the current sample of the utility model carries out the collection of data through the mode of the external mutual inductor in outside, has very high changeability and adaptability, according to the different situations of site environment, is equipped with the different external mutual inductor;
3, have jumbo memory function and preservation data unload function; The utility model inside is furnished with the large-capacity data storage chip; Can supply to store the historical data of some months; This type historical data all is all kinds of qualities of power supply in the measure field electric system, and the various historical datas of being preserved all can download in the USB flash disk through USB port;
4, rich data and graphic presentation; The utility model can show a large amount of power quality datas, for example voltage, current distortion rate, 1～50 subharmonic, Voltage unbalance and current imbalance etc., and these all are the power quality datas that conventional electric power table meter is not had; And the utility model has adopted high-resolution touch LCD screen; It is more convenient to use, and interface displayed is more friendly, more smooth without the blocked operation between the interface;
5, multiple parameter can be established, and the utility model provides miscellaneous parameter, can supply the user to be directed against no measuring object and carry out corresponding setting, has increased the dirigibility that monitor uses greatly, and is with respect to conventional electric power table meter, more convenient in the use;
6, the external communication port that enriches, networking is light, and the utility model has adopted bus structure; Can expand various communication interfaces; Carry out communication with computer and other multiple host computer platform, make the user can not pass through the host computer platform observed data, be user-friendly in the equipment erecting stage;
7, acp chip is powerful, the utility model adopt the most modern microprocessor and and Digital Signal Processing, the data processing function of dsp chip is powerful; Can calculate and analyze the data of being sampled rapidly; And ability is process mass data simultaneously, and the ARM chip is advantageous in the control of hardware, and response speed is very fast; The button operation of can be very smooth response touch-screen, and the abundant function that extends out is arranged;
8, more advanced, more effective algorithm, the utility model adopt novel fast Fourier analysis to combine with instantaneous reactive, can extract the data of the resulting harmonic content of chip sampling fast and accurately, reach the effect of frequency analysis accurately.And the utility model adopts the flickering and the fluction analysis of total digitalization, and is more effective than the conventional analogue component analysis, quicker, integrated higher;
9, power consumption is very low, and during operate as normal, power consumption is less than 5VA;
10, easy for installation, only need with the three-phase voltage of equipment under test and with being connected of extraneous mutual inductor, get final product operate as normal, other equipment of peripheral hardware connect again
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the data flowchart of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
Like Fig. 1, shown in Figure 2, a kind of electric energy quality monitor comprises power module, data acquisition module 3, operational amplifier 4, A/D conversion chip 5, control chip 6 and display screen 7; The output terminal of described data acquisition module 3 is connected with operational amplifier 4, and described operational amplifier 4 is connected with control chip 6 through A/D conversion chip 5, and described control chip 6 is connected with display screen 7;
Described data acquisition module 2 is gathered foreign current and voltage data; Behind operational amplifier 4 signal conditions, be transferred to A/D conversion chip 5; This A/D conversion chip 5 is transferred to control chip 6 after converting thereof into digital signal; 6 pairs of data that receive of control chip continue to calculate power quality data, and when display screen 7 needed to show, control chip 6 sent to display screen 7 with corresponding power quality data and shows.
Described power module comprises AC/DC converter 1 and DC/DC converter 2; The input end of described AC/DC converter 1 is connected with external ac power source; The output terminal of described AC/DC converter 1 is connected with input end, the display screen 7 of DC/DC converter 2 respectively, and the output terminal of described DC/DC converter 2 is connected with operational amplifier 4, A/D conversion chip 5 respectively.AC/DC converter 1 is direct current 5V and 12V with outside input AC 220V voltage transitions, and direct current 12V voltage gives display screen 7 as WV.And DC/DC converter 2 changes the direct current 5V voltage of the output of AC/DC converter 1 into the WV of A/D conversion chip 5, operational amplifier 4.Set about the DC/DC converter 2 that we have adopted the near-end power supply from power supply, can improve the on-the-spot adaptability and the job stability of equipment so greatly.Above-mentioned DC/DC converter 2 adopts isolates the output of voltage stabilizing two-way, and above-mentioned AC/DC converter 1 is a small size switch module power supply.
Described data acquisition module 3 comprises the voltage transformer (VT) summation current transformer.Described voltage transformer (VT) is an isolated voltage transformer, and described current transformer is for isolating current transformer.
Described control chip 6 comprises DSP61, ARM62, storer 63 and extends out communication interface 64; The input end of described DSP61 is connected with AC/DC converter 5; The output terminal of described DSP61 is connected with ARM62, described ARM62 respectively with storer 63, extend out communication interface 64 and be connected; Described DSP61 converts the electric current and voltage digital signal that receives to various power quality datas; And send the data to ARM62; Described ARM62 with the data that receive pack, subpackage, storage, and the data after will handling are uploaded through extending out communication interface.Described power quality data comprises three-phase imbalance data, frequency analysis data and voltage fluctuation and flicker data.The described communication interface 64 that extends out comprises 232 communication interfaces, 485 communication interfaces, CAN EBI, USB interface and Ethernet interface, and described 232 communication interfaces are connected with display screen.
Described storer 63 comprises the SD card memory of Flash storer and outside straight cutting.Wherein the Flash storage has little, the advantage of simple structure of volume of storage chip, but its memory capacity that can expand is less.And the memory capacity of SD card storage is bigger, can reach the memory space of several G, but the shared space of its device is bigger.The data of being preserved in the expanded data memory function of the utility model all can be downloaded in the USB flash disk through USB interface.
Described display screen 7 is the touch LCD display screen, and this touch LCD display screen can show that real time data interface, frequency analysis interface, the quality of power supply are counted interface, waveform display interface, histogram display interface, data download the interface and parameter is provided with the interface.
As shown in Figure 2, be the workflow of the utility model.After the device power-up; Data acquisition module 3 promptly begins to carry out data acquisition through outside mutual inductor; Through giving control chip 6 with digital data transmission behind operational amplifier 4 and the A/D conversion chip 5; Control chip 6 begins to carry out data computing after gathering the data of a cycle, the data acquisition and the calculation process of Here it is acquiescence duty following table meter.
After the page turn over operation of carrying out the touch LCD display screen, program begins to judge the function of button.When program judge button operation for get into real time data interface, frequency analysis interface, when the quality of power supply is counted the interface; Touch LCD display screen page turning to the page of above-mentioned 3 kinds of data presentation, and read the needed data of this page of data to control chip 6 simultaneously and show then.
When program judges that button operation is waveform display interface, histogram display interface, the page of supreme this graphic presentation of touch LCD display screen page turning; At the waveform display interface, the touch LCD display screen reads real-time data point position to control chip 6, and the waveform of three-phase voltage, three-phase current is presented on the screen; When the histogram display interface, the touch LCD display screen reads the data of each harmonic content to control chip 6, and with reference to the data of first-harmonic, and the size of the each harmonic table form with a number percent is presented on the screen through histogram intuitively.
When the program judgement needed to get into data download interface, the page turning of touch LCD display screen was to this interface.The user can select the download of current real time data and the download of a historical data in this page.When the user selects real time data to download, will generate the text document of a real time data in the USB flash disk, control chip 6 is transferred to the current real time data that calculates in the real time data text document in the USB flash disk through USB interface.
When the user selects the download of historical data; Program can be according to the date of the data of preserving in the storage chip; In USB flash disk, generate the text document on corresponding date; And control chip 6 reads the historical data of preserving in the storage chip, and these data based dates are saved in the USB flash disk in the corresponding text document.
When the program judgement needed the entering parameter that the interface is set, the page turning of touch LCD display screen was to this interface.The user can revise and be provided with parameter according to different needs this moment, and after clicking save button, electric energy quality monitor is got back to the demonstration of initial interface, and program is got back to the beginning of master routine, restarts the operation of a flow process according to the value of parameter setting.
Rig-site utilization:
The utility model applying flexible is changeable, and it can be used as instrument and uses separately, also can be used as the front end original paper of intelligent grid supervisory system, gathers in order to realize remote data acquisition and information.The RS-485 communication interface of industrial standard and Modbus communications protocol make networking easily convenient, and through USB field data download function, let you analyze more easily to understand the field electric energy situation.No matter be applied to which kind of site environment, electric energy quality monitor is only permitted from being introduced the sample line of three-phase voltage, three-phase current by sampling end, and the supply line of one group of alternating current 220V, can normally carry out work.
The utility model can be applied to various control system, energy management system, power transformation robotization as a kind of advanced person's intellectuality, digitized electrical network front-end collection original paper; Distribution network automated, the monitoring of sub-district power monitoring, industrial automation; Intelligent building, intelligent power distribution dish, switch cubicle.Have easy for installationly, wiring is simple, and is easy to maintenance, and quantities is little, and the data acquisition precision is high, and data processing is rapid, and control system is stable, and networking is light, strong interference immunity, characteristics such as on-the-spot usb data download.And because the utility model adopted advanced digitization system, so the structure of product more simplified by the tradition table meter that analog device is formed, and the cost control machine of integral product is more reasonable, and cost is more cheap.The use colony and the applicable surface of product are wider.
Claims (8)
1. an electric energy quality monitor is characterized in that, comprises power module, data acquisition module, operational amplifier, A/D conversion chip, control chip and display screen; The output terminal of described data acquisition module is connected with operational amplifier, and described operational amplifier is connected with control chip through the A/D conversion chip, and described control chip is connected with display screen.
2. a kind of electric energy quality monitor according to claim 1; It is characterized in that; Described power module comprises AC/DC converter and DC/DC converter; The input end of described AC/DC converter is connected with external ac power source, and the output terminal of described AC/DC converter is connected with input end, the display screen of DC/DC converter respectively, and the output terminal of described DC/DC converter is connected with operational amplifier, A/D conversion chip respectively.
3. a kind of electric energy quality monitor according to claim 1 is characterized in that described data acquisition module comprises the voltage transformer (VT) summation current transformer.
4. a kind of electric energy quality monitor according to claim 1; It is characterized in that; Described control chip comprises DSP, ARM, storer and extends out communication interface; The power input of described DSP is connected with the AC/DC converter, and the signal output part of described DSP is connected with ARM, described ARM respectively with storer, extend out communication interface and be connected.
5. a kind of electric energy quality monitor according to claim 4; It is characterized in that; The described communication interface that extends out comprises 232 communication interfaces, 485 communication interfaces, CAN EBI, USB interface and Ethernet interface, and described 232 communication interfaces are connected with display screen.
6. a kind of electric energy quality monitor according to claim 4 is characterized in that, described storer comprises the SD card memory of Flash storer and outside straight cutting.
7. a kind of electric energy quality monitor according to claim 1 is characterized in that, described display screen is the touch LCD display screen.
8. a kind of electric energy quality monitor according to claim 3 is characterized in that, described voltage transformer (VT) is an isolated voltage transformer, and described current transformer is for isolating current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205415027U CN202372592U (en) | 2011-12-21 | 2011-12-21 | Electric energy quality monitoring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205415027U CN202372592U (en) | 2011-12-21 | 2011-12-21 | Electric energy quality monitoring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202372592U true CN202372592U (en) | 2012-08-08 |
Family
ID=46596289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205415027U Expired - Fee Related CN202372592U (en) | 2011-12-21 | 2011-12-21 | Electric energy quality monitoring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202372592U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998554A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | ARM-based (Advanced RISC Machines-based) power quality detection device |
| CN103326359A (en) * | 2012-03-19 | 2013-09-25 | 上海利思电气有限公司 | Tandem type neutral line dynamic active harmonic damper |
| CN103454530A (en) * | 2013-09-03 | 2013-12-18 | 苏州太谷电力股份有限公司 | Detection device and detection method for power quality |
| CN104062496A (en) * | 2014-07-03 | 2014-09-24 | 国家电网公司 | Portable mobile electric testing recorder and optimization method therefor |
| CN104062495A (en) * | 2014-07-03 | 2014-09-24 | 国家电网公司 | Touch type electric energy data test recorder |
-
2011
- 2011-12-21 CN CN2011205415027U patent/CN202372592U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326359A (en) * | 2012-03-19 | 2013-09-25 | 上海利思电气有限公司 | Tandem type neutral line dynamic active harmonic damper |
| CN102998554A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | ARM-based (Advanced RISC Machines-based) power quality detection device |
| CN103454530A (en) * | 2013-09-03 | 2013-12-18 | 苏州太谷电力股份有限公司 | Detection device and detection method for power quality |
| CN104062496A (en) * | 2014-07-03 | 2014-09-24 | 国家电网公司 | Portable mobile electric testing recorder and optimization method therefor |
| CN104062495A (en) * | 2014-07-03 | 2014-09-24 | 国家电网公司 | Touch type electric energy data test recorder |
| CN104062496B (en) * | 2014-07-03 | 2017-03-22 | 江苏省电力公司宿迁供电公司 | Portable mobile electric testing recorder and optimization method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103176066B (en) | Digitalized electric energy quality monitoring device | |
| CN104569902B (en) | Digital type electric energy meter power consumption measuring device and method | |
| CN201732120U (en) | Power consumption information collecting and monitoring system in base station | |
| CN202372592U (en) | Electric energy quality monitoring instrument | |
| CN103323686B (en) | A kind of intelligent grid power quality analyzer | |
| CN101881790A (en) | Intelligent electric power parameter tester | |
| CN104330612A (en) | Resonant overvoltage monitoring system and method | |
| CN103964312B (en) | Electric block energy efficiency testing device and test method | |
| CN102967778B (en) | A kind of electrical network checkout gear and detection method thereof | |
| CN204679622U (en) | With the three-phase intelligent electric-energy meter communication interface load capacity proving installation of communication module | |
| CN203191430U (en) | Multifunctional electric power parameter display instrument based on DSP | |
| CN103023046B (en) | Based on the operating passing zero filtering reactive power compensator that dsp chip controls | |
| CN202230155U (en) | Three-phase digital intelligent electric energy quality detection device | |
| CN110470963A (en) | A kind of high voltage capacitive apparatus insulated performance on-line monitoring device based on DSP | |
| CN203976235U (en) | Electric block energy efficiency testing device | |
| CN206807145U (en) | A kind of automatic test device of distribution terminal | |
| CN202524168U (en) | Power quality data monitoring device | |
| CN202870219U (en) | Intelligent power quality monitoring system | |
| CN202066925U (en) | Harmonic monitor of electric network | |
| CN202494744U (en) | Device for detecting quality of electric energy | |
| CN105242219B (en) | Method for automatically measuring DC voltage conversion efficiency | |
| CN204405737U (en) | A kind of harmonic measurement device based on DSP | |
| CN203133201U (en) | Integrated measurement device for energy-storage grid-connected system | |
| CN102608423A (en) | Detection method of harmonic energy | |
| CN202486308U (en) | Harmonic electric quantity measuring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIVESINE ELECTRIC (SHANGHAI) CO., LTD. Free format text: FORMER NAME: SHANGHAI DOUBLE X TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 201108 Shanghai, Minhang District, Hong Jian Road, No. third, building 1, building 99, 2 Patentee after: Leith electric (Shanghai) Co. Ltd. Address before: 200240 C building, No. 4299 Jin Du Road, Shanghai, Minhang District, 1-773 Patentee before: Shanghai Double X Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20141221 |
|
| EXPY | Termination of patent right or utility model |