CN201014997Y - Virtual instrument based excitation system testing device - Google Patents
Virtual instrument based excitation system testing device Download PDFInfo
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- CN201014997Y CN201014997Y CNU2006200280624U CN200620028062U CN201014997Y CN 201014997 Y CN201014997 Y CN 201014997Y CN U2006200280624 U CNU2006200280624 U CN U2006200280624U CN 200620028062 U CN200620028062 U CN 200620028062U CN 201014997 Y CN201014997 Y CN 201014997Y
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Abstract
This utility model relates to a testing device of generator excited system based on virtual instrument technology, solving that problems that all the functions of prior measuring device are implemented with hardware or built-in software form, the data processing function is insufficient, the running speed and reliability are poor; moreover, the manufacturing technology of these instruments is complicated, the manufacturing cost is high and these instruments are imported mostly. This utility model can gather, analyze, process, display, store and telecommunicate the testing data of generator excited system accurately and conveniently, thus the information for automatic test and diagnosis of generator excitation can be provided, and the stable operation of electric power system is guaranteed. The superiority and technical effects of this utility model are that the hardware equipment is combined with software programming; installation is simple and configuration of parameters is clear; data gathering is simple and testing panel is realistic and the testing operation is flexible, thus the running speed and reliability of testing system are greatly enhanced.
Description
(1) technical field:
The utility model belongs to the generator excited system technical field of measurement and test, is a kind of generator excited system proving installation based on virtual instrument technique.
(2) background technology:
Along with the continuous expansion of electric system scale, good excitation system has become the strong guarantee of power network safety operation.The test of excitation system is the important step of a whole set of starting characteristics test before the generator connecting in parallel with system, and its test water is straight to connect operation level after the whole series that are related to generator start and generator puts into operation.Therefore the test of excitation system has become the focus that this technical field is paid close attention to.The surveying instrument that adopts mainly contains analogue instrument, discrete component formula instrument, digital instrumentation and the smart instrumentation etc. of pointer-type at present.The function of these measurement mechanisms all is to exist with the hardware or the form of the software of curing, lacks dirigibility, and the most complex process of these instruments, involve great expense, dependence on import.The appearance of virtual instrument is a new revolution of field of test instrument, and it is the product that computer technology, the communication technology and measuring technique combine.Compare with traditional surveying instrument, virtual instrument all has remarkable advantages at aspects such as intelligent degree, processing power, cost performance, dirigibility and extensibilities.Therefore with Application of Virtual an important directions of modernized excitation system test.
(3) summary of the invention:
The purpose of this utility model is to provide a kind of excitation system proving installation based on virtual instrument, this proving installation be with up-to-date Application of Virtual in generator excited system test.This is the quick measurement that the pick-up unit at center can be finished a plurality of time dependent parameters with the computing machine, and can suppress noise effectively, carry out data processing, signal analysis, obtain with the value of measurand relevant information or provide the state of its differentiation by the voltage and current signal that records.
The technical solution of the utility model: a kind of excitation system proving installation based on virtual instrument, form by hardware device and testing software.Hardware device mainly comprises: sensor, signal condition module, three parts of computing machine of data collecting card are housed.Testing software mainly is made up of the control of data acquisition, analysis and processing, the demonstration of data and the telecommunication of storage and proving installation of data.
The hardware device of proving installation is converted into low-voltage, the weak current signal that the signal condition module can be accepted to high voltage, big current signal by sensor; The signal condition module is made up of voltage signal modulate circuit and current signal modulate circuit, they all are connected with the analog input end of data collecting card, and with signal conveys to computing machine, two modules are used for the voltage or the current signal of sensor output are carried out pre-filtering, isolation/amplification, Filtering Processing again, be converted into data collecting card the voltage and current scope that can accept, testing software control data capture card is finished the simulating signal input and is quantized, then digital signal is carried out analyzing and processing, and the time show on the spot, and long-range user is stored and be transferred to significant data.
The voltage signal modulate circuit mainly contains: bleeder circuit, pre-filtering, isolated amplifier and again filtering form.Adopt the precision resistance R1 and the Rp of M Ω level to carry out dividing potential drop in the bleeder circuit, signal after the dividing potential drop filters the high frequency interference noise via the step low-pass pre-filtering circuit that amplifier LM358 builds, filtered signal is delivered to the isolation that isolated amplifier AD215 carries out signal, the step low-pass that signal after isolate amplifying is built via amplifier LM358 again filtering circuit again filters noise and ripple disturbs, and delivers to data collecting card at last and samples.
The current signal modulate circuit mainly by current/voltage-converted, pre-filtering, isolated amplifier and again filtering form, utilize operational amplifier LM358 to build a current/voltage-converted circuit, the size of the resistance by adjusting Rf is regulated the gain in this loop, pre-filtering, isolated amplifier and filtering circuit is identical with the voltage signal modulate circuit are again delivered to data collecting card at last and are sampled.
Modules such as the fft analysis of the effective value calculating of the main filtering by signal of the analysis of data and processing, signal, signal frequency calculating, signal, the phase differential of signal and power factor calculating are formed.The signal filtering module is that the alternating current-direct current signal that collects is carried out filtering, filtering interfering noise signals, and real-time display waveform, call the effective value computing module after collection is finished to data simultaneously, calculate the electric current of output and the effective value of voltage, by the signal frequency module and then obtain the frequency of signal. call the fft analysis module and carry out spectrum analysis according to the DFT/FFT Zymography, phase difference correction and error analysis, the power factor module of signal can calculate the power factor of signal by the call signal phase difference module, and with the real-time video data of indicator indication control.
The demonstration of data mainly is made up of the indicator demonstration of signal waveform demonstration, signal, the modules such as storage of signal with storage.Signal waveform shows that by the waveform control data-signal is by the real-time demonstration of indicator indication control, and the memory module of signal is used for the data of storage of collected or the data after the processing.
Telecommunication is to adopt the DataSocket control to include the hardware device and the resources such as testing software, measured point and database of this virtual instrument in network, realizes resource sharing.
Principle of work of the present utility model:
The principle of work based on the excitation system proving installation of virtual instrument that the utility model relates to is: proving installation is at first finished the parameter configuration of sensor, signal condition module and data collecting card and log-on data capture program; Sensor will be converted into low-voltage, the weak current signal that signal conditioning circuit can be accepted by the set end voltage of measured motor, current signal and excitation high voltage, big current signal; The signal condition module is carried out pre-filtering, isolation/amplification, Filtering Processing again with the voltage of sensor output or current signal, be converted into data collecting card voltage or the range of current that can accept; Data collecting card is finished set end voltage, electric current and field voltage, current signals, finishes the conversion of simulating signal to digital signal; The computing machine that the virtual instrument testing software is housed is finished being gathered the analysis and the processing of the signal that comes, comprising: the filtering of signal, the effective value of signal calculates, the frequency computation part of signal, the fft analysis of signal, the phase differential of signal and power factor are calculated module, by oscillography window intuitively, virtual instrument control display waveform or data such as dial plate indication, and important data are delivered to database storing prepare against reference or survey aftertreatment, telecommunication is the sharpest edges of virtual instrument test platform, it is with virtual instrument, external unit, resource such as measured point and database is included network in, realize resource sharing, make the technician just can not obtain real test figure, improved testing efficiency in test site.
Superiority of the present utility model and technique effect are: 1. hardware device combines with software programming, and hardware unit is installed simple, and the virtual test panel is intuitively easy-to-use; 2. can directly carry out the configuration of parameter by the virtual test panel, thereby save the error that manual configuration is brought harvester; 3. simple based on the data acquisition modes and the self-made signal modulate circuit of PC-DAQ formula, reduced cost; 4. network technology is applied to this, make the technician just can not obtain real test figure, realize resource sharing, improved testing efficiency in test site; 5. adopt the Virtual Instrument Development environment can construct test panel true to nature easily, and test function all is to be realized by software programming, uses flexible freedom; 6. utilize computing machine data computation and data-handling capacity at a high speed, can improve the travelling speed and the reliability of test macro greatly.
(4) description of drawings:
Accompanying drawing 1 is a general structure synoptic diagram of the present utility model.
Accompanying drawing 2 is the voltage signal conditioning module structural representation in the utility model hardware device.
Accompanying drawing 3 is the current signal conditioning module structural representation in the utility model hardware device.
Accompanying drawing 4 is the implementing procedure figure of testing software of the present utility model.
Accompanying drawing 5 is the Digital Signal Analysis and Processing process flow diagram in the utility model testing software.
Accompanying drawing 6 is the telecommunication process flow diagram in the utility model testing software.
(5) embodiment:
Embodiment:
Excitation system proving installation general structure based on virtual instrument is illustrated as shown in Figure 1: this device is made up of hardware device and testing software, hardware device mainly adopts and the supporting product of Virtual Instrument Development environmental facies, comprise sensor, signal condition module, three parts of computing machine of data collecting card are housed, testing software mainly contains the control of data acquisition, analysis and processing, the demonstration of data and the telecommunication of storage and test platform of data.The sensor of proving installation is converted into low-voltage, the weak current signal that the signal condition module can be accepted with voltage, the current signal of tested end, the signal condition module is carried out pre-filtering, isolation/amplification, Filtering Processing again with the voltage of sensor output or current signal, be transformed into data collecting card voltage or the range of current that can accept, data collecting card is finished the collection and the quantification of simulating signal, and the computing machine that testing software is housed is finished the analysis of data, processing, demonstration, storage and telecommunication.
The structural representation of the voltage signal conditioning module of hardware device is as shown in Figure 2: the voltage signal conditioning module is carried out dividing potential drop, pre-filtering, isolation/amplification, Filtering Processing again to the voltage of voltage sensor output, and it is mainly formed and comprises: the filtering circuit again of the pre-filtering circuit of the bleeder circuit of signal, signal, the isolation/amplifying circuit of signal, signal.For the voltage that makes sensor output less than the voltage range of isolated amplifier chip and keep enough accuracy, bleeder circuit adopts the precision resistance R1 of M Ω level and Rp series connection to carry out dividing potential drop, little resistance potentiometer Rp is to realize the function of fine setting gain, signal after the dividing potential drop is via amplifier LM358 and R2, R3, the step low-pass pre-filtering circuit that C1 builds filters the high frequency interference noise, filtered signal is delivered to the isolation that isolated amplifier AD215 carries out signal, guaranteed the safety of test macro, and suppressed the common mode interference of equipment under test and test macro effectively, signal after isolation is amplified is again via amplifier LM358 and R4, R5, the step low-pass that C2 builds filtering circuit again filters noise and ripple interference, delivers to data collecting card at last and samples.
The current signal conditioning module structural representation of hardware device is shown in 3 figure: the current signal conditioning module is carried out current/voltage-converted, pre-filtering, isolation/amplification, Filtering Processing again to the electric current of voltage sensor output, and it is mainly formed and comprises: the isolation/amplifying circuit of the current/voltage-converted circuit of signal, the pre-filtering circuit of signal, signal, the filtering circuit again of signal.Utilize operational amplifier LM358 to build a current/voltage-converted circuit, according to " empty disconnected " principle, electric current I in will almost all flow through resistance R _ f, and according to " virtual earth " principle, the positive-negative input end of amplifier is idiostatic with ground, so amplifier output voltage U out is Iin*Rf, the size of resistance that therefore can be by adjusting Rf is regulated the gain in this loop, signal after the conversion is via amplifier LM358 and R2, R3, the step low-pass pre-filtering circuit that C1 builds filters the high frequency interference noise, filtered signal is delivered to the isolation that isolated amplifier AD215 carries out signal, guaranteed the safety of test macro, and suppressed the common mode interference of equipment under test and test macro effectively, signal after isolation is amplified is again via amplifier LM358 and R4, R5, the step low-pass that C2 builds filtering circuit again filters noise and ripple interference, delivers to data collecting card at last and samples.
The testing software implementing procedure is as shown in Figure 4: testing software at first is provided with parameters such as the sample frequency, sampling number, sampling channel of data collecting card, and the control data capture card carries out synchronized sampling to set end voltage, machine end current signal and field voltage, exciting current signal; The data that obtain after the sampling are delivered to analysis and the processing that computing machine carries out data, mainly are to be carried out filtering, effective value calculating, frequency computation part, fft analysis, phase differential and power factor calculating to gathering the signal that comes; The demonstration of data and storage are used for handled signal with the output of form such as oscillography window, dial plate indication intuitively, and important data are delivered to database storing; Telecommunication is the sharpest edges of virtual instrument test platform, and it includes resources such as virtual instrument, external unit, measured point and database in network, realizes resource sharing, finishes test assignment jointly to improve the speed and the efficient of test, reduces expenses.
Digital Signal Analysis and Processing flow process in the testing software is as shown in Figure 5: modules such as the effective value that comprises filtering, the signal of signal calculates, the phase differential of the fft analysis of the frequency computation part of signal, signal, signal and power factor calculating.The signal filtering module is that the alternating current-direct current signal that collects is carried out filtering, filtering interfering noise signals, and real-time display waveform, after finishing, data acquisition calls the effective value computing module, calculate the electric current of output and the effective value of voltage, the frequency module of call signal detects by the zero crossing to the signal period and the phase-locked loop module of software designs, detect the signal period, and then obtain the frequency of signal, call the fft analysis module and carry out spectrum analysis, phase difference correction and error analysis, and then obtain the phase differential of three-phase alternating current according to the DFT/FFT Zymography; The power factor module of signal is by calling the power factor that phase difference module can calculate signal, and the real-time indicator indicating module video data that calls, and whether check reaches required standard.
Telecommunication in the testing software is as shown in Figure 6: mainly utilize DataSocket control in the Virtual Instrument Development software to realize network monitoring based on TCP/IP, at first the DataSocket control is carried out parameter configuration, utilize the DataSocket node to communicate then, the first step utilizes DataSocket Open node to open a DataSocket connection; Second step was utilized DataSocket Write node to finish with DataSocket Read node and communicates by letter, server VI also utilizes DataSocket Write node that data are published to the URL appointed positions, and client computer VI utilizes the DataSocket Read node will be from URL appointed positions reading of data; In the 3rd step, utilize DataSocket Clear node to close the DataSocket connection, thereby finish the process of whole telecommunication.
Claims (3)
1. excitation system proving installation based on virtual instrument, it is characterized in that: this device is to be made of sensor, signal condition module, three parts of computing machine that data collecting card is housed, said sensor comprises voltage and current sensor, respectively the high voltage of tested end, big current signal is converted into low-voltage, the weak current signal that the signal condition module can be accepted; Said signal condition module is made up of voltage signal modulate circuit and current signal modulate circuit, and they all are connected with the analog input end of data collecting card in the computing machine, and transmission signals is transported to computing machine; The said computing machine that data collecting card is housed has the output terminal of demonstration, guidance panel, data storage end and telecommunication exchange end.
2. according to a kind of excitation system proving installation of claim 1 based on virtual instrument, it is characterized in that: said voltage signal modulate circuit is by bleeder circuit, the pre-filtering circuit, isolated amplifier and again filtering circuit form, in bleeder circuit, adopt the divider resistance R1 and the Rp of M Ω level, the pre-filtering circuit filtering that signal after the dividing potential drop makes up via operational amplifier LM358, filtered signal is delivered to the isolation amplification that isolated amplifier AD215 carries out signal, after the filtering of filtering circuit again that signal is built via operational amplifier LM358 again, the data collecting card that outputs voltage signal in the terminal circuit is sampled.
3. according to a kind of excitation system proving installation of claim 1 based on virtual instrument, it is characterized in that: said current signal modulate circuit by current/voltage-converted circuit, pre-filtering circuit, isolated amplifier and again filtering circuit form, said current/voltage-converted circuit is made up by operational amplifier LM358, between the output terminal of operational amplifier LM358 and reverse input end gain resistor Rf is arranged; The pre-filtering circuit filtering that gain signal makes up via operational amplifier LM358, filtered signal is delivered to the isolation amplification that isolated amplifier AD215 carries out signal, after the filtering of filtering circuit again that signal is built via operational amplifier LM358 again, the data collecting card that outputs voltage signal in the terminal circuit is sampled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNU2006200280624U CN201014997Y (en) | 2006-11-09 | 2006-11-09 | Virtual instrument based excitation system testing device |
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| CNU2006200280624U CN201014997Y (en) | 2006-11-09 | 2006-11-09 | Virtual instrument based excitation system testing device |
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| CN201014997Y true CN201014997Y (en) | 2008-01-30 |
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| CNU2006200280624U Expired - Fee Related CN201014997Y (en) | 2006-11-09 | 2006-11-09 | Virtual instrument based excitation system testing device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253337A (en) * | 2011-04-18 | 2011-11-23 | 江苏南自通华电气成套有限公司 | Zero-power over underexcitation test method for synchronous motor |
| CN102749544A (en) * | 2012-07-20 | 2012-10-24 | 广州供电局有限公司 | Power equipment testing system based on virtual instrument technology |
| CN102749494A (en) * | 2012-07-01 | 2012-10-24 | 中国东方电气集团有限公司 | Circuit and method for detecting remaining power of motor drive controller of electric vehicle |
| CN103675427A (en) * | 2012-08-31 | 2014-03-26 | 紘康科技股份有限公司 | Inrush current measuring device |
| CN103728510A (en) * | 2013-12-18 | 2014-04-16 | 国电南瑞科技股份有限公司 | Site testing system and method for excitation device |
| CN104374989A (en) * | 2014-11-29 | 2015-02-25 | 江西洪都航空工业集团有限责任公司 | Multi-channel signal conditioning board |
| CN106788020A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of exciter control system |
| CN106878214A (en) * | 2016-12-26 | 2017-06-20 | 北京航天易联科技发展有限公司 | A kind of signal modulation card |
-
2006
- 2006-11-09 CN CNU2006200280624U patent/CN201014997Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253337A (en) * | 2011-04-18 | 2011-11-23 | 江苏南自通华电气成套有限公司 | Zero-power over underexcitation test method for synchronous motor |
| CN102253337B (en) * | 2011-04-18 | 2013-01-09 | 江苏南自通华电气成套有限公司 | Zero-power over underexcitation test method for synchronous motor |
| CN102749494A (en) * | 2012-07-01 | 2012-10-24 | 中国东方电气集团有限公司 | Circuit and method for detecting remaining power of motor drive controller of electric vehicle |
| CN102749494B (en) * | 2012-07-01 | 2015-05-13 | 中国东方电气集团有限公司 | Circuit and method for detecting remaining power of motor drive controller of electric vehicle |
| CN102749544A (en) * | 2012-07-20 | 2012-10-24 | 广州供电局有限公司 | Power equipment testing system based on virtual instrument technology |
| CN103675427A (en) * | 2012-08-31 | 2014-03-26 | 紘康科技股份有限公司 | Inrush current measuring device |
| CN103728510A (en) * | 2013-12-18 | 2014-04-16 | 国电南瑞科技股份有限公司 | Site testing system and method for excitation device |
| CN104374989A (en) * | 2014-11-29 | 2015-02-25 | 江西洪都航空工业集团有限责任公司 | Multi-channel signal conditioning board |
| CN106788020A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of exciter control system |
| CN106788020B (en) * | 2016-12-14 | 2019-05-28 | 四川德胜集团钒钛有限公司 | A kind of exciter control system |
| CN106878214A (en) * | 2016-12-26 | 2017-06-20 | 北京航天易联科技发展有限公司 | A kind of signal modulation card |
| CN106878214B (en) * | 2016-12-26 | 2020-06-05 | 北京航天易联科技发展有限公司 | Signal modulation card |
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