CN103278791A - Electronic transformer amplitude and phase error checking system with networked detection function - Google Patents
Electronic transformer amplitude and phase error checking system with networked detection function Download PDFInfo
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Abstract
The invention discloses an electronic transformer amplitude and phase error checking system with a networked detection function. Specifically, the system receives analog data acquired by a standard transformer, and digital sampling value message data sent by the electronic transformer, adopts a self-adaptive algorithm based on equal interval sampling at different sampling frequencies and signal quasi-synchronous characteristics, and obtains the amplitude, phase error and other parameters of each channel by standardized calculation through comparison. The system provided by the invention can be used for amplitude and phase error checking of electronic voltage and current transformers of various types in an intelligent substation, and can realize the networked detection of single-path or multi-path electronic transformers and merge unit circuits without external synchronization signal pulse in the traditional testing scheme, so that the transformer testing system is simplified, the impact of tedious discrete functional testing work and testing blind points of a multiplexer is avoided, the testing time of equipment is shortened, and the detection efficiency of the electronic transformer is improved.
Description
Technical field
The invention discloses the electronic mutual inductor amplitude phase error check system that Networkable detects, belong to Power System Intelligent transformer station technical field.
Background technology
Develop rapidly along with electric system; the electromagnetic type power transmission and transforming equipment has obtained sufficient development; the voltage and current mutual inductor is to be the electric system electric energy metrical; relay protection device; measuring and controlling equipments etc. provide voltage; the visual plant of current signal; the safety of its operation stability and reliability and electric system; reliably; economical operation is closely related; the rising with electric pressure of increasing along with applied environment; the tradition electromagnetic transformer has exposed magnetic saturation gradually; ferroresonance; high frequency response characteristic is poor; the second open circuit short circuit; long Distance Transmission signal drops influences measuring accuracy; problems such as secondary load coupling difficulty are having a strong impact on the stable of Operation of Electric Systems.
The development of photoelectron, optical fiber communication and Digital Signal Processing and application have promoted the research of digitized voltage and current measurement techniques, arise at the historic moment based on different modes, the electronic type voltage of different acquisition principle, current transformer.
By the conversion principle, electronic mutual inductor can be divided into active and passive two big classes.The active electronic transformer characteristics are to provide power supply to the sensing head original paper, and current transformer mainly is representative with the Luo-coil, and present stage is mainly adopted the Laser Power Devices function; Voltage transformer (VT) has capacitance partial pressure, electric resistance partial pressure, serial induction dividing potential drop etc., and present stage is directly adopted the direct supply energy supply.Passive electrical minor mutual inductor mainly adopts optical principle to measure, and current transformer mainly contains Faraday magnetooptical effect principle, match lattice Neck effect principle, and voltage transformer (VT) has general visitor's that effect principle, inverse piezoelectric effect principle etc.Newly-increased merge cells MU equipment is as the important interface equipment of data acquisition, and major function is to gather the digital signal of multichannel electronic mutual inductor output synchronously and send the sampled value message data according to the form of standard code.Compare with traditional electromagnetic transformer, superior performances such as electronic mutual inductor has good insulation preformance, anti-electromagnetic interference performance is strong, transient response good, frequency response range is wide, dynamic range is big, measuring accuracy height have tangible technology and economic advantages.
In intelligent substation, when carrying out the verification of electronic type voltage, current transformer, need to increase by one can with the merge cells device of electronic mutual inductor interface, output offers the transformer checking system use based on the standard sample value message of IEC 61850, therefore, the test of the functional characteristic of electronic mutual inductor has also comprised the test in merge cells loop simultaneously.
Traditional electrical minor mutual inductor on site testing scheme as shown in Figure 1.Standard mutual inductor adopts traditional electromagnetic transformer (still not having standard electric minor mutual inductor at present), be output as the analog data of electric current 5A/1A, voltage 100V, 100/ √ 3V, the digital FT3 signal of electronic mutual inductor Optical Fiber Transmission or simulation small-signal (specified) are changed into the sampled value data of IEC 61850 standards with the merge cells device, therefore, during test electronic mutual inductor amplitude phase performance, be generally the whole loop performance test of electronic mutual inductor+merge cells.Merge cells and transformer checking system equipment room are point-to-point direct-connected by optical fiber, for time-delay and the merge cells of eliminating on the optical fiber transmission path sends the influence that shake is delayed time, all increased realization outer synchronous signal pulse signal in the traditional scheme, generally by transformer checking system equipment output or independently outer synchronized clock system realize based on optical fiber B sign indicating number.
When carrying out checking electronic type transformers, generally need merge cells device of configuration to cooperate function and the accuracy test that carries out mutual inductor, the merge cells of actual motion is the whole measurement of electronic mutual inductor loop and can't obtains test, maybe can't test the merge cells port that is about to rig-site utilization, on-the-spot whole loop performance can't be verified, and has significantly test blindspot; As adopt based on network method of testing, and then can under the situation that does not increase equipment, carry out full test in application apparatus and the whole loop of measuring to the scene, integrality and the reliability of test improve greatly, have established the basis of equipment high-acruracy survey operation.
In addition; because point-to-point sample mode and the quantitative limitation of transformer checking system fiber optic Ethernet number of ports; carry out at need under the situation of a large amount of transformer tests; the same time only can test separate unit mutual inductor of the same type; simple repeated test workload is big; the precision of transforming plant protecting, observing and controlling and metering be can influence to a certain extent, safety, the stable operation of comprehensive automation system of transformer substation influenced when serious.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of electronic mutual inductor amplitude phase error check system system that external synchronization signal pulse, Networkable detect that need not, to satisfy the needs of all kinds of electronic type voltage current transformers+amplitude in merge cells loop and the off-line of phase error and networked verification in the intelligent substation.
For achieving the above object, the present invention takes following technical scheme to realize:
The electronic mutual inductor amplitude phase error check system that Networkable detects comprises
Electronic mutual inductor data acquisition interface module: comprise that self-adaptation Ethernet data interface module and configurable I EEE more than 1588 are from the clock interface module, described self-adaptive multi-path Ethernet data interface module possesses multichannel process layer sampled value fiber interface module, sampled value type of message on motion tracking, resolving layer network, the sampled value message data of can point-to-point or networked access procedure layer network switch sending here can be by port arrangement and compatible IEC 61850-9-1, the 9-2/9-2LE transmission protocol supported; And realize that at corresponding Ethernet interface a plurality of IEEE 1588 is from clock, described configurable I EEE more than 1588 meets the standard from the clock interface module and only is the requirement from clock, can be configured to one to one major clock in the fixing tracking and testing merge cells device from clock, the optimal clock that does not participate in standard is selected logic, only relevant with institute's corresponding major clock time from clock time, need not the outer synchronous signal pulse;
Standard source data interface module: possess standard secondary CT/PT analog quantity translation interface, can gather 5A/1A current signal or the 100V voltage analog signal data of standard mutual inductor, be converted to the AD chip and gather required small voltage signal, send in the high precision standard source data processing module;
Standard parameter calculates and output module: adopt the uniformly-spaced non-synchronous data methods of sampling, based on variable data window, interpolation iterative algorithm sampled data is carried out high precision computation, realize frequency measurement, amplitude, phase error verification and the data output function of multichannel electronic mutual inductor simultaneously, comprise: the sampled value data receive synchronous processing module, high precision standard source data processing module, frequency-tracking measurement module, amplitude and phase measurement module, electronic mutual inductor amplitude phase error verification module and data show and human-computer interaction module.
Aforementioned configurable I EEE more than 1588 is from the clock interface module, when adopting networked sampled value to insert, with realize 1 IEEE 1588 major clock in each merge cells device of electronic mutual inductor interface, fixedly operate in the described this locality of standard optimum clock MASTER state, free-running operation is on certain internal clocking, need not to accept synchronously outer, the optimal clock that does not participate in standard is selected logic, described merge cells device sends corresponding sampled value message in strict accordance with the major clock beat, and process layer network switch is supported the transparent clock host-host protocol and is operated under the P2P pattern simultaneously.
The aforementioned sample Value Data receives synchronous processing module, sampling pulse sets up standard in electronic mutual inductor error checking system, a plurality of IEEE 1588 are from the separately relative time of clock in the standard sample pulse arrival moment in the acquisition system, utilize each merge cells fixed sample normal delay to convert out the 0th bag respective pulses time of corresponding sampled value test serial number, adopt the buffer memory in the variable data window to fill the numerical value of resolving different testing datas source, simultaneously, by the sampled data bag that markers calculate to be taken out synchronization or obtained near the high precision standard source data processing module discrete sampling in the moment, realize that the reception of multi-channel sampling Value Data interface and standard source channel sample is synchronous.
Aforementioned high precision standard source data processing module, adopt seniority, low noise, high frequency band AD acquisition chip, the continuous small voltage signal systematic sampling collection that the standard source data-interface is sent here, be converted to the series of discrete digital signal, deliver to next stage by high-speed PCI-E interface and carry out the data computation processing, the standard source sampling precision satisfies the requirement of 0.2s level fully, error less than ten thousand/.
Aforementioned frequency-tracking measurement module, the sampled value signal that the series of discrete digital signal of gathering according to standard source passage AD and multichannel electronic mutual inductor to be measured send, for the different sampling rates of two kinds of data sources, non-integer-period sampled source data, based on the plural form Fourier function after the conversion, adopt the adaptive frequency track algorithm, in four cycles, can high precision computation go out two kinds of frequency offset of signal Δs on the passage
fAnd signal frequency
f, frequency error is less than 5/10000ths.
Aforementioned amplitude and phase measurement module, the sampled value signal that the series of discrete digital signal of gathering according to standard source passage AD and multichannel electronic mutual inductor to be measured send, for the different sampling rates of two kinds of data source passages, non-integer-period sampled source data, adopt the quasi-synchronous algorithm of DFT all-wave Fourier transform, data window of many sampling periods, four iteration, draw the accurate amplitude of each channel data on two kinds of passages; Adopt the time domain interpolation algorithm of variable cycle data window, Lagrange's interpolation calculating, all-wave Fourier transform, draw the precise phase of two kinds of each channel datas of data source.
Aforementioned electric minor mutual inductor amplitude phase error verification module is analyzed the electronic mutual inductor amplitude phase value that calculates and amplitude and the phase place of standard source passage, draws amplitude and the phase error parameter of each road electronic mutual inductor to be verified.
Aforementioned data shows and human-computer interaction module, adopt touch liquid crystal, the start and stop control of response input and standard source, sample checking parameter are set and are selected, the frequency of display standard source and electronic mutual inductor signal checking, amplitude, phase differential, data waveform, the absolute delayed data of signal, and verification and generate the survey report of electronic mutual inductor automatically, make things convenient for storage and the user record analysis of data.
The invention has the beneficial effects as follows: the invention discloses the electronic mutual inductor amplitude phase error check system that a kind of Networkable detects, can be used for the amplitude of all kinds of electronic type voltage current transformers in the intelligent substation and the verification of phase error, can realize single channel or realize that simultaneously the networking in multichannel electronic mutual inductor+merge cells loop detects; The present invention has simplified the mutual inductor measuring test system, has avoided the multichannel equipment discrete function to test the influence of loaded down with trivial details work and test blindspot, has reduced the testing of equipment time, has improved the efficient that electronic mutual inductor detects; The present invention is that present traditional test scheme relies on the external synchronization signal pulse, the discrete test job complexity of on-the-spot multichannel electronic mutual inductor function, and the transformer circuit test has the problem of blind spot that a kind of convenient effective solution is provided.
Description of drawings
Fig. 1 is traditional electrical minor mutual inductor amplitude error check system one-piece construction synoptic diagram;
Fig. 2 is the electronic mutual inductor amplitude phase error check system one-piece construction synoptic diagram that Networkable of the present invention detects;
Fig. 3 is the built-in function structural representation of the electronic mutual inductor amplitude phase error check system of Networkable detection of the present invention.
Embodiment
Below in conjunction with the drawings and the specific embodiments the present invention is made specific description.
Fig. 2 is the electronic mutual inductor amplitude phase error check system one-piece construction synoptic diagram that Networkable of the present invention detects.
Compared to Figure 1, apparent in view variation has been arranged on the system architecture, at first cancelled the use of outer synchronous signal pulse, in each merge cells device, realize IEEE 1588 major clocks of 1 simplification, in electronic mutual inductor error checking system equipment, realize a plurality of from time clock feature, distinguish the major clock of independently tracked each data source, simplified the structure of test macro, reduced the difficulty of the whole loop-around test of on-the-spot electronic mutual inductor+merge cells.Simultaneously by process layer network switch device, can very easy realization receive to multichannel merge cells sampled value data the time, can the configuration of operational outfit or merge cells device etc. not exerted an influence, the batch networking that is fit to carry out the whole on-line testing of electronic mutual inductor+merge cells or realize multichannel electronic mutual inductor of the same type is simultaneously measured.
The electronic mutual inductor amplitude phase error check system that Networkable of the present invention detects receives the digital sampled value message data that the analog data that comes from the standard mutual inductor collection and electronic mutual inductor send, employing is based on the adaptive algorithm of different sample frequency equal interval samplings, the accurate synchronous characteristic of signal, relatively draws the parameter such as amplitude, phase error of each passage by standardized calculation.Specific functional modules comprises
Electronic mutual inductor data acquisition interface module: comprise that self-adaptation Ethernet data interface module and configurable I EEE more than 1588 are from the clock interface module, described self-adaptive multi-path Ethernet data interface module possesses multichannel process layer sampled value fiber interface module, sampled value type of message on motion tracking, resolving layer network, the sampled value message data of can point-to-point or networked access procedure layer network switch sending here can be by port arrangement and compatible IEC 61850-9-1, the 9-2/9-2LE transmission protocol supported; And realize that at corresponding Ethernet interface a plurality of IEEE 1588 is from clock, described configurable I EEE more than 1588 meets the standard from the clock interface module and only is the requirement from clock, can be configured to one to one major clock in the fixing tracking and testing merge cells device from clock, the optimal clock that does not participate in standard is selected logic, only relevant with institute's corresponding major clock time from clock time, need not the outer synchronous signal pulse; When adopting networked sampled value to insert, with realize 1 IEEE 1588 major clock in each merge cells device of electronic mutual inductor interface, fixedly operate in the described this locality of standard optimum clock MASTER state, free-running operation is on certain internal clocking, need not to accept synchronously outer, the optimal clock that does not participate in standard is selected logic, described merge cells device sends corresponding sampled value message in strict accordance with the major clock beat, and process layer network switch is supported the transparent clock host-host protocol and is operated under the P2P pattern simultaneously.
Standard source data interface module: possess standard secondary CT/PT analog quantity translation interface, can gather 5A/1A current signal or the 100V voltage analog signal data of standard mutual inductor, be converted to the AD chip and gather required small voltage signal, send in the high precision standard source data processing module;
Standard parameter calculates and output module: adopt the uniformly-spaced non-synchronous data methods of sampling, based on variable data window, interpolation iterative algorithm sampled data is carried out high precision computation, realize frequency measurement, amplitude, phase error verification and the data output function of multichannel electronic mutual inductor simultaneously, comprise: the sampled value data receive synchronous processing module, high precision standard source data processing module, frequency-tracking measurement module, amplitude and phase measurement module, electronic mutual inductor amplitude phase error verification module and data show and human-computer interaction module.
Fig. 3 is the built-in function structural representation of the electronic mutual inductor amplitude phase error check system of Networkable detection of the present invention.
During work, the merge cells device receives FT3 optical fiber and digital signal or the small voltage analog signals that electronic mutual inductor transmits, and it is converted to the digital sampled value data that meet IEC 16850 standards synchronously.In each merge cells device, realize IEEE 1588 major clocks simultaneously, need not outside to the time synchronous, and the sampled value message sends on the process layer network switch according to the beat of major clock, process layer network switch is supported the transparent clock host-host protocol, and can the sampled value message be forwarded at a high speed on other port of switch as required.
Electronic mutual inductor error checking system is by self-adaptation Ethernet data interface, the sampled value message data that the desampler transmission over networks is come, simultaneously, realize that a plurality of IEEE 1588 is from clock, by configurable I EEE more than 1588 from the clock interface module, make from clock to be configured to fix the major clock of following the tracks of the supporting merge cells device of to-be-tested transformer one to one, accurately obtain the major clock time;
Sampling pulse sets up standard in electronic mutual inductor error checking system, a plurality of IEEE 1588 are from the separately relative time of clock in the standard sample pulse arrival moment in the sampled value data reception synchronous processing module acquisition system, utilize each merge cells fixed sample normal delay to convert out the corresponding sampled value test serial number corresponding burst length of the 0th bag, adopt the buffer memory in the variable data window to fill the numerical value of resolving different testing datas source, simultaneously, by the sampled data bag that markers calculate to be taken out synchronization or obtained near the high precision standard source data processing module discrete sampling in the moment, realize that the reception of multi-channel sampling Value Data interface and standard source channel sample is synchronous;
High precision standard source data processing module adopts seniority, low noise, high frequency band AD acquisition chip, the continuous small voltage signal systematic sampling collection that the standard source data-interface is sent here, be converted to the series of discrete digital signal, deliver to next stage by high-speed PCI-E interface and carry out the data computation processing, the standard source sampling precision satisfies the requirement of 0.2s level fully, error less than ten thousand/;
The sampled value signal that a series of high sampling rate discrete digital signals that the frequency-tracking measurement module is gathered according to standard source passage AD and electronic mutual inductor to be measured send, for the different sampling rates of two kinds of data sources, non-integer-period sampled source data, Fourier's function based on the plural form after the conversion, adopt the adaptive frequency track algorithm, in four cycles, can high precision can calculate two kinds of frequency offset Δs on the passage
fAnd signal frequency
f, frequency error is less than 5/10000ths;
The sampled value signal that the series of discrete digital signal that amplitude and phase measurement module are gathered according to standard source passage AD and multichannel electronic mutual inductor to be measured send, for the different sampling rates of two kinds of data sources, non-integer-period sampled source data, adopt the quasi-synchronous algorithm of DFT all-wave Fourier transform, data window of many sampling periods, four iteration, calculate the accurate amplitude of each channel data; Adopt the time domain interpolation algorithm of variable cycle data window, Lagrange's interpolation calculating, all-wave Fourier transform, draw the precise phase of each channel data;
Electronic mutual inductor amplitude phase error verification module is analyzed the electronic mutual inductor amplitude phase value that calculates and amplitude and the phase place of standard source passage, but just verification goes out amplitude and the phase error of multichannel electronic mutual inductor;
Show by data at last and information such as the frequency of man-machine interaction Liquid Crystal Module display standard source and electronic mutual inductor signal checking, amplitude, phase differential, data waveform, the absolute delayed data of signal, and generate the test verification report of electronic mutual inductor automatically; Data show and human-computer interaction module adopts touch liquid crystal, and the start and stop control of response input and standard source, sample checking parameter are set and selected.
Above-described embodiment does not limit the present invention in any form, all take to be equal to replace or technical scheme that the form of equivalent transformation obtains, all drop within protection scope of the present invention.
Claims (8)
1. the electronic mutual inductor amplitude phase error check system of Networkable detection is characterized in that: comprise
Electronic mutual inductor data acquisition interface module: comprise that self-adaptation Ethernet data interface module and configurable I EEE more than 1588 are from the clock interface module, described self-adaptation Ethernet data interface module possesses multichannel process layer sampled value fiber interface module, from motion tracking, sampled value type of message on the resolving layer network, the sampled value message data of can point-to-point or networked access procedure layer network switch sending here, can be by port arrangement and the compatible IEC 61850-9-1 that supports, the 9-2/9-2LE transmission protocol, and realize that at corresponding Ethernet data interface a plurality of IEEE 1588 is from clock; Described configurable I EEE more than 1588 meets the standard from the clock interface module and only is the requirement from clock, can be configured to one to one major clock in the fixing tracking and testing merge cells device from clock, the optimal clock that does not participate in standard is selected logic, only relevant with institute's corresponding major clock time from clock time, need not the outer synchronous signal pulse;
Standard source data interface module: possess standard secondary CT/PT analog quantity translation interface, can gather 5A/1A current signal or the 100V voltage analog signal data of standard mutual inductor, be converted to the AD chip and gather required small voltage signal, send in the high precision standard source data processing module;
Standard parameter calculates and output module: adopt the uniformly-spaced non-synchronous data methods of sampling, based on variable data window, interpolation iterative algorithm sampled data is carried out high precision computation, realize frequency measurement, amplitude, phase error verification and the data output function of multichannel electronic mutual inductor simultaneously, comprise: the sampled value data receive synchronous processing module, high precision standard source data processing module, frequency-tracking measurement module, amplitude and phase measurement module, electronic mutual inductor amplitude phase error verification module and data show and human-computer interaction module.
2. the electronic mutual inductor amplitude phase error check system that detects of Networkable according to claim 1, it is characterized in that: described configurable I EEE more than 1588 is from the clock interface module, when adopting networked sampled value to insert, with realize 1 IEEE 1588 major clock in each merge cells device of electronic mutual inductor interface, fixedly operate in the described this locality of standard optimum clock MASTER state, free-running operation is on certain internal clocking, need not to accept synchronously outer, the optimal clock that does not participate in standard is selected logic, described merge cells device sends corresponding sampled value message in strict accordance with the major clock beat, and process layer network switch is supported the transparent clock host-host protocol and is operated under the P2P pattern simultaneously.
3. the electronic mutual inductor amplitude phase error check system that detects of Networkable according to claim 1, it is characterized in that: described sampled value data receive synchronous processing module, sampling pulse sets up standard in electronic mutual inductor error checking system, a plurality of IEEE 1588 are from the separately relative time of clock in the standard sample pulse arrival moment in the acquisition system, utilize each merge cells fixed sample normal delay to convert out the 0th bag respective pulses time of corresponding sampled value test serial number, adopt the buffer memory in the variable data window to fill the numerical value of resolving different testing datas source, simultaneously, by the sampled data bag that markers calculate to be taken out synchronization or obtained near the high precision standard source data processing module discrete sampling in the moment, realize that the reception of multi-channel sampling Value Data interface and standard source channel sample is synchronous.
4. the electronic mutual inductor amplitude phase error check system that detects of Networkable according to claim 1, it is characterized in that: described high precision standard source data processing module, adopt seniority, low noise, high frequency band AD acquisition chip, the continuous small voltage signal systematic sampling collection that the standard source data-interface is sent here, be converted to the series of discrete digital signal, deliver to next stage by high-speed PCI-E interface and carry out the data computation processing, the standard source sampling precision satisfies the requirement of 0.2s level, error less than ten thousand/.
5. the electronic mutual inductor amplitude phase error check system that detects of Networkable according to claim 1, it is characterized in that: described frequency-tracking measurement module, the sampled value signal that the series of discrete digital signal of gathering according to standard source passage AD and multichannel electronic mutual inductor to be measured send, for the different sampling rates of two kinds of data sources, non-integer-period sampled source data, based on the plural form Fourier function after the conversion, adopt the adaptive frequency track algorithm, in four cycles, can high precision computation go out two kinds of frequency offset of signal Δs on the passage
fAnd signal frequency
f, frequency error is less than 5/10000ths.
6. the electronic mutual inductor amplitude phase error check system that detects of Networkable according to claim 1, it is characterized in that: described amplitude and phase measurement module, the sampled value signal that the series of discrete digital signal of gathering according to standard source passage AD and multichannel electronic mutual inductor to be measured send, for the different sampling rates of two kinds of data source passages, non-integer-period sampled source data, adopt the quasi-synchronous algorithm of DFT all-wave Fourier transform, data window of many sampling periods, four iteration, draw the accurate amplitude of each channel data on two kinds of passages; Adopt the time domain interpolation algorithm of variable cycle data window, Lagrange's interpolation calculating, all-wave Fourier transform, draw the precise phase of two kinds of each channel datas of data source.
7. the electronic mutual inductor amplitude phase error check system that detects of Networkable according to claim 1, it is characterized in that: described electronic mutual inductor amplitude phase error verification module, the electronic mutual inductor amplitude phase value that calculates and the amplitude phase place of standard source passage are analyzed, draw amplitude and the phase error parameter of each road electronic mutual inductor to be verified.
8. the electronic mutual inductor amplitude phase error check system that detects of Networkable according to claim 1, it is characterized in that: described data show and human-computer interaction module, adopt touch liquid crystal, the start and stop control of response input and standard source, sample checking parameter are set and are selected, the frequency of display standard source and electronic mutual inductor signal checking, amplitude, phase differential, data waveform, the absolute delayed data of signal, automatically verification and generate the survey report of electronic mutual inductor makes things convenient for storage and the user record analysis of data.
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