CN103323686A - Smart power grid power quality analyzer - Google Patents
Smart power grid power quality analyzer Download PDFInfo
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- CN103323686A CN103323686A CN2012100731370A CN201210073137A CN103323686A CN 103323686 A CN103323686 A CN 103323686A CN 2012100731370 A CN2012100731370 A CN 2012100731370A CN 201210073137 A CN201210073137 A CN 201210073137A CN 103323686 A CN103323686 A CN 103323686A
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Abstract
The invention relates to a smart power grid power quality analyzer. The analyzer comprises a base plate, a control panel and a display unit, wherein the control panel and the display unit are used for data processing and communication, the control panel comprises an analog switch power supply, a signal sensor, an operational amplifier, an A/D conversion chip, a control chip and a communication module, the analog switch power supply is connected with the operational amplifier, the A/D conversion chip, the control chip and the display unit, the output end of the signal sensor is connected with the operational amplifier, the operational amplifier is connected with the control chip through the A/D conversion chip, and the output end of the control chip is connected with the display unit through the communication module. Compared with the prior art, the smart power grid power quality analyzer has the advantages of being convenient to install, simple in wiring, convenient to maintain, small in work amount, high in data acquisition accuracy, rapid in data processing, stable in control system, easy in networking, strong in anti-interference performance and the like.
Description
Technical field
The present invention relates to a kind of intelligent grid power quality data monitoring equipment, especially relate to a kind of intelligent grid power quality analyzer.
Background technology
The quality of power supply (Power Quality), on the strictness meaning, the leading indicator of weighing the quality of power supply has voltage, frequency and waveform.Refer to quality supply from universal significance, 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 substantially.
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 data such as three-phase imbalance, voltage fluctuation and flicker in the electric system.Therefore can not do a perfect analysis to the system situation in the electrical network.
Intelligent grid, it is exactly the intellectuality of electrical network, be also referred to as " electrical network 2.0 ", it is to be based upon on the basis of integrated, high-speed bidirectional communication network, sensing by the advanced person and measuring technique, advanced equipment and technology, advanced control method and advanced decision support system (DSS) The Application of Technology realize the target of reliable, the safety, economy of electrical network, efficient, environmental friendliness and use safety.
China energy expert Wu Jiandong proposes " interactive electrical network " concept.Interactive electrical network, English is Interactive Smart Grid, it is contained the implication of intelligent grid wherein.Interactive electrical network is defined as: on open and interconnected information pattern basis, by loading system digital device and upgrading electrical network network management system, realizing the full-range intellectuality of power industry, informationization, classification interactive managements such as generating, transmission of electricity, power supply, electricity consumption, client's sale of electricity, electrical network graded dispatching, integrated service, is that the comprehensive efficient of having gathered Industrial Revolution, technological revolution and management revolution is changed.It will reproduce the information circuits of electrical network, make up the novel feedback system of user, promote electrical network and be energy-conservation infrastructure whole transition, improve energy efficiency, reduce client cost, reduce greenhouse gas emission, create the maximization that electrical network is worth.
Interactive electrical network can also be by electric terminal with between the user; form network interdynamic and immediately be connected between user and the grid company; it is real-time to realize that electric power data reads; at a high speed; two-way general effect; data in can integration system; improve the integrated effect of central power system; realize effective critical load protection; realize the seamless interlinkage of various power supplys and client terminal and electrical network; can optimize the management of electrical network thus; electrical network is promoted the new mode that turns round for interactive; form the brand-new service function of electrical network, improve the reliability of whole electrical network; availability and overall efficiency.
In the nearly 20 years evolution of automation of transformation substations technology, along with popularizing of intelligent electronic device, form many individual event automated systems, relatively independent between these systems, there is not direct electrical link, manage, safeguard by the different departments of electric power enterprise usually.Because of a great variety, the interface and the function that provide have nothing in common with each other, equipment room can not be shared information, forms " island of automation " problem, not only increases cost, also influences the reliability of system, increases user's maintenance workload.Present various Integrated Solution all can not provide high-level information sharing.Under such background, International Electrotechnical Commission has proposed the IEC61850 standard.This is a based on network communication system standard, comprises many-sided contents such as object-oriented, communication network, interface and mapping, systems and management project.
IEC61850 is as the Standards Code of digital transformer substation, have characteristics such as unification, standard, self-described, easy expansion, it is of a great variety thoroughly to have solved present traditional transformer station stipulations, incompatible, be difficult to characteristics such as expansion, unique stipulations of transformer station after will becoming.
Summary of the invention
Purpose of the present invention is exactly that a kind of precision height, low in energy consumption, easy for installation and satisfy the intelligent grid power quality analyzer of digital transformer substation standard criterion is provided in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of intelligent grid power quality analyzer, it is characterized in that, comprise base plate, the control panel and the display unit that are used for data processing and communication, described control panel comprises analog switched power supply, signal transducer, operational amplifier, the A/D conversion chip, control chip and communication module, described analog switched power supply is the concatenation operation amplifier respectively, the A/D conversion chip, control chip and display unit, the output terminal concatenation operation amplifier of described signal transducer, described operational amplifier is by A/D conversion chip and control chip, and the output terminal of described control chip is connected with display unit by communication module;
Signal transducer is transferred to control chip with the signal that collects after by operational amplifier and A/D conversion chip, transfers data to display unit after control chip is handled signal and shows in real time, realizes online real-time monitoring.
Described communication module comprises 232 communication chips, 485 communication modules and ethernet communication module.
Described base plate is provided with connection terminal and the ethernet communication interface that connects outside sampling, described connection terminal connects analog switched power supply and signal transducer respectively, and described ethernet communication interface is connected with the remote terminal monitoring equipment by described ethernet communication module.
Also comprise the DC/DC converter, this DC/DC converter input end is connected with analog switched power supply, output terminal is connected with A/D conversion chip, amplifier amplifier respectively, the part voltage transitions that described DC/DC converter is exported analog switched power supply becomes the normal working voltage of A/D conversion chip, amplifier amplifier, and described DC/DC converter is for isolating the voltage regulation type converter.
Described signal transducer comprises the voltage transformer (VT) summation current transformer.
Described operational amplifier is the instrument operational amplifier.
Described A/D converter chip is 16 6 passage A/D converter chips.
Described control chip comprises dsp chip and ARM chip, the input end of described dsp chip connects described A/D conversion chip, the output terminal of dsp chip connects the ARM chip, described ARM chip is connected with display unit by communication module, described dsp chip is responsible for the collection of digital signal and is converted various digital signals to various power quality datas, described ARM chip reads various power quality datas from dsp chip, and by communication module data is sent to display unit.
Described display unit is touch LCD screen.
Compared with prior art, the present invention has following advantage:
1) high-precision data-switching: the present invention adopts the A/D converter chip of 16 6 passages and error only to be the instrument amplifier of ppt, data acquisition is by the instrument amplifier, be transferred to high-precision A/D conversion chip again, and finally calculate accurate data by algorithm by control chip;
2) ability of adaptation site environment is strong: current sample of the present invention carries out the collection of data by 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 different outside mutual inductors;
3) have jumbo memory function and preservation data unload function: inside of the present invention is furnished with the large-capacity data storage chip, can be for the historical data of storage some months, this class historical data all is all kinds of qualities of power supply in the measure field electric system, and the various historical datas of preserving all can download in the USB flash disk by USB port;
4) rich data and figure show: the present invention can show a large amount of power quality datas, for example voltage, current distortion rate, 1～50 subharmonic, Voltage unbalance and current imbalance etc., these all are the power quality datas that conventional electric power table meter is not had, and the present invention has adopted high-resolution touch liquid crystal display, it is more convenient to use, interface displayed is more friendly, and the blocked operation between different interfaces is more smooth;
5) multiple parameter can be established: the invention provides miscellaneous parameter, can arrange accordingly at different measuring objects for the user, increased the dirigibility that monitor uses greatly, and with respect to conventional electric power table meter, more convenient in the use;
6) Feng Fu external communication port, networking is light: the present invention has adopted bus structure, can expand various communication interfaces, support the IEC61850 stipulations, satisfy the transformer substation communication system, but multiple devices compose in parallel with PC and other multiple host computer platform and carry out communication, make the user can realize remote monitoring, the real-time Monitoring Data of host computer platform can be passed through in the equipment erecting stage of noting be used in, satisfy the construction requirements of the automation of transformation substations, make things convenient for the interconnected of the management of various IED in the transformer station and equipment room, realize the seamless link of system;
7) acp chip is powerful: the present invention 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 sampling rapidly, and can handle data in enormous quantities simultaneously, and the ARM chip is advantageous in the control of hardware, response speed is very fast, and it is low in energy consumption, all kinds of operational orders of response that can be very smooth, and the abundant function that extends out is arranged, support various communication interfaces;
8) more advanced, more effective algorithm: the present invention adopts novel fast Fourier analysis to combine with instantaneous reactive, can extract the chip resulting harmonic content data of sampling fast and accurately, reach the effect of frequency analysis accurately, and the present invention adopts flickering and the fluction analysis of total digitalization, more effective than traditional analog quantity analysis, quicker, integrated higher;
9) power consumption is very low: during operate as normal, power consumption is less than 10VA;
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 structural representation of the present invention;
Fig. 2 is workflow diagram of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in Figure 1, ACT-X intelligent grid power quality analyzer, comprise base plate, be used for data and handle control panel and display unit with communication: base plate is provided with and is connected connection terminal and the ethernet communication interface of sampling in the outside; Control panel comprises analog switched power supply 1, signal transducer 2, operational amplifier 3, A/D conversion chip 4, control chip 5 and communication module, analog switched power supply 1 is concatenation operation amplifier 3 respectively, A/D conversion chip 4, control chip 5 and display unit, the independence input of analog switched power supply 1 is connected with connection terminal, the input end of signal transducer 2 also is connected with connection terminal, the output terminal concatenation operation amplifier 3 of signal transducer 2, operational amplifier 3 is by A/D conversion chip 4 and control chip 5, the output terminal of control chip 5 is connected with display unit by communication module, and communication module comprises 232 communication chips, 485 communication modules and ethernet communication module; Display unit is touch LCD screen 6.
Signal transducer 3 comprises the voltage transformer (VT) summation current transformer.Signal transducer 2 is transferred to control chip 5 with the signal that collects after by operational amplifier 3 and A/D conversion chip 4, transfer data to display unit 6 after the 5 pairs of signals of control chip are handled and show in real time, or transfer data to the remote terminal monitoring equipment by ethernet communication interface and ethernet communication module and realize online real-time monitoring.
Also be provided with DC/DC converter 7 between analog switched power supply 1 and operational amplifier 3 and the A/D conversion chip 4, the part voltage transitions that DC/DC converter 7 is exported analog switched power supply becomes the normal working voltage of amplifier amplifier 3, A/D conversion chip 4, and DC/DC converter 7 is for isolating the voltage regulation type converter.DC/DC converter 7 has voltage input end, earth terminal, voltage output end, and the positive supply of A/D conversion chip 4 and communication module, earth terminal are connected with voltage output end, the earth terminal of DC/DC converter 7 respectively.Operational amplifier 3 adopts the instrument operational amplifier, and the A/D conversion chip adopts 16 6 passage A/D conversion chips.
The DC/DC transducer is divided into isolated form and non-isolation type, both differences are: the ground of isolated form is divided into input ground and output ground, and non-isolation type has only a ground, the effect of employing non-isolation type can be more better, can improve the isolation voltage level of system, but the DC/DC of isolated form is more expensive than the non-isolation type usually.
Control chip 4 comprises dsp chip and ARM chip, and the input end of dsp chip connects the A/D conversion chip, and the output terminal of dsp chip connects the ARM chip, and the ARM chip is connected with display unit by communication module.Wherein dsp chip mainly is responsible for the collection of digital signal and is converted various digital signals to various power quality data by programmed algorithm.And the ARM chip mainly is responsible for reading various power quality datas and data communication from dsp chip, by 232 communication chips or 485 communication modules data is sent to liquid crystal display and shows, by the ethernet communication interface data and remote terminal is carried out message exchange.The also control of participation device of ARM chip simultaneously, the various functions of its opertaing device, functions such as for example parameter setting, data download, and the interface switching of touch screen operation etc.RTU (remote terminal unit) can be connected communication with ethernet communication interface of the present invention by netting twine, realizes functions such as remote data monitoring, parameter setting, data download by supporting upper computer software.
As shown in Figure 2, the workflow of ACT-X intelligent grid power quality analyzer is as follows:
After the device power-up, sampling section namely begins to carry out data acquisition by information sensor 2, through giving control chip 5 with digital data transmission behind operational amplifier 3 and the A/D conversion chip 4, control chip 5 is gathered the calculating that begins to carry out data after the data of a cycle, data acquisition and the calculation process of Here it is acquiescence duty following table meter;
After the page turn over operation of carrying out LCDs 6, program begins to judge the function of button: when program judge button operation for enter real time data interface, frequency analysis interface, when the quality of power supply is counted the interface, the liquid crystal display page turning is to above-mentioned 3 kinds of data page displayed, and reads the needed data of this page of data to control chip simultaneously and show then;
When program judges that button operation is waveform display interface, histogram display interface, supreme this figure page displayed of liquid crystal display page turning: at the waveform display interface, liquid crystal display reads real-time data point position to control chip, and the waveform of three-phase voltage, three-phase current is presented on the screen; When the histogram display interface, liquid crystal display reads the data of each harmonic content to control chip, and with reference to the data of first-harmonic, is presented on the screen with the form of a number percent intuitively by histogram the size of each harmonic table;
When program judges that need enter data downloads the interface, the liquid crystal display page turning is 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, to generate the text document of a real time data in the USB flash disk, control chip is transferred to the current real time data that calculates in the real time data text document in the USB flash disk by 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 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 program judged that need enter parameter arranges the interface, the liquid crystal display page turning was to this interface.The user can revise and arrange parameter according to different needs this moment, and after clicking save button, the ACT-X 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.
The present invention can pass through the ethernet communication interface, follow the 61850-5 communication protocol, be connected with the remote terminal monitoring equipment, the remote terminal monitoring equipment carries out real time data by supporting upper computer software to this instrument to be observed, remote data is downloaded, parameter arranges, and gets over operations such as the report from a liner police arranges, and can also form data analysis report on demand.
Applying flexible of the present invention 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, the Modbus communications protocol, ethernet communication module and the Various types of data communications protocol can be converted to the stipulations modular converter of 61850 stipulations, make networking easily convenient, and USB field data download function is arranged, allow the user both can understand power status by also making things convenient in the device context analysis by the real-time monitoring substation equipment of upper computer software ruuning situation at the remote terminal monitoring equipment.Easy for installation need of equipment are introduced the sample line of three-phase voltage, three-phase current from being sampled end, and the supply line of one group of alternating current 220V, can normally carry out work.
The present invention 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 residential quarter power monitoring, industrial automation, intelligent building, intelligent power distribution dish, switch cubicle.The present invention has easy for installation, and wiring is simple, and is easy to maintenance, and quantities is little, data acquisition precision height, and data are handled rapidly, and control system is stable, and networking is light, strong interference immunity, characteristics such as on-the-spot usb data download.And because the present invention 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, and use colony and the applicable surface of product are wider.
Claims (9)
1. intelligent grid power quality analyzer, it is characterized in that, comprise base plate, the control panel and the display unit that are used for data processing and communication, described control panel comprises analog switched power supply, signal transducer, operational amplifier, the A/D conversion chip, control chip and communication module, described analog switched power supply is the concatenation operation amplifier respectively, the A/D conversion chip, control chip and display unit, the output terminal concatenation operation amplifier of described signal transducer, described operational amplifier is by A/D conversion chip and control chip, and the output terminal of described control chip is connected with display unit by communication module;
Signal transducer is transferred to control chip with the signal that collects after by operational amplifier and A/D conversion chip, transfers data to display unit after control chip is handled signal and shows in real time, realizes online real-time monitoring.
2. a kind of intelligent grid power quality analyzer according to claim 1 is characterized in that, described communication module comprises 232 communication chips, 485 communication modules and ethernet communication module.
3. a kind of intelligent grid power quality analyzer according to claim 2, it is characterized in that, described base plate is provided with connection terminal and the ethernet communication interface that connects outside sampling, described connection terminal connects analog switched power supply and signal transducer respectively, and described ethernet communication interface is connected with the remote terminal monitoring equipment by described ethernet communication module.
4. a kind of intelligent grid power quality analyzer according to claim 1, it is characterized in that, also comprise the DC/DC converter, this DC/DC converter input end is connected with analog switched power supply, output terminal is connected with A/D conversion chip, amplifier amplifier respectively, the part voltage transitions that described DC/DC converter is exported analog switched power supply becomes the normal working voltage of A/D conversion chip, amplifier amplifier, and described DC/DC converter is for isolating the voltage regulation type converter.
5. a kind of intelligent grid power quality analyzer according to claim 1 is characterized in that described signal transducer comprises the voltage transformer (VT) summation current transformer.
6. a kind of intelligent grid power quality analyzer according to claim 1 is characterized in that, described operational amplifier is the instrument operational amplifier.
7. a kind of intelligent grid power quality analyzer according to claim 1 is characterized in that, described A/D converter chip is 16 6 passage A/D converter chips.
8. a kind of intelligent grid power quality analyzer according to claim 1, it is characterized in that, described control chip comprises dsp chip and ARM chip, the input end of described dsp chip connects described A/D conversion chip, the output terminal of dsp chip connects the ARM chip, described ARM chip is connected with display unit by communication module, described dsp chip is responsible for the collection of digital signal and is converted various digital signals to various power quality datas, described ARM chip reads various power quality datas from dsp chip, and by communication module data is sent to display unit.
9. a kind of intelligent grid power quality analyzer according to claim 1 is characterized in that, described display unit is touch LCD screen.
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| CN103529327A (en) * | 2013-10-23 | 2014-01-22 | 南京灿能电力自动化有限公司 | All-station power quality monitoring device and monitoring method applicable to intelligent transformer substation |
| CN103795145A (en) * | 2014-01-21 | 2014-05-14 | 南宁市三华太阳能科技有限公司 | Distributed power supply node real-time monitoring and analyzing system device and analyzing method |
| CN104698250A (en) * | 2013-12-06 | 2015-06-10 | 展讯通信（上海）有限公司 | Mobile terminal, current decomposing and positioning method and system thereof and current testing device |
| CN105608877A (en) * | 2016-02-24 | 2016-05-25 | 河南派亚尼尔自动化设备有限公司 | Touch-screen household heat meter collector and application method |
| CN110231563A (en) * | 2019-07-17 | 2019-09-13 | 西安西电开关电气有限公司 | A kind of monitoring device and its monitoring information method for down loading of high-tension switch gear |
| CN110955178A (en) * | 2019-11-26 | 2020-04-03 | 胜业电气股份有限公司 | Electric energy quality intelligent controller based on DSP technology |
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| CN103323686B (en) | 2016-03-09 |
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Address after: 201108 Shanghai, Minhang District, Hong Jian Road, No. third, building 1, building 99, 2 Applicant after: Leith electric (Shanghai) Co. Ltd. Address before: 200240 C building, No. 4299 Jin Du Road, Shanghai, Minhang District, 1-773 Applicant before: Shanghai Double X Technology Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SHANGHAI DOUBLE X TECHNOLOGY CO., LTD. TO: LIVESINE ELECTRIC (SHANGHAI) CO., LTD. |
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| C14 | Grant of patent or utility model | ||
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