CN107884739A - A kind of powered analysis system of electronic mutual inductor - Google Patents
A kind of powered analysis system of electronic mutual inductor Download PDFInfo
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- CN107884739A CN107884739A CN201710911152.0A CN201710911152A CN107884739A CN 107884739 A CN107884739 A CN 107884739A CN 201710911152 A CN201710911152 A CN 201710911152A CN 107884739 A CN107884739 A CN 107884739A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The present invention provides a kind of powered analysis system of electronic mutual inductor, is made up of multiple electronic mutual inductors and combining unit, failure wave-recording and Network records analytical equipment, host computer.Electronic mutual inductor is connected with combining unit respectively, and combining unit is connected with failure wave-recording and Network records analytical equipment, and failure wave-recording and Network records analytical equipment are connected with rear end host computer.Electronic mutual inductor gathered data is sent to failure wave-recording and Network records analytical equipment by combining unit, failure wave-recording and Network records analytical equipment storage massive store hard disk, the data of collection are carried out by Data Format Transform by the software of establishment, and Algorithms of Wavelet Analysis is carried out by Labview analysis softwares and off-line analysis processing is carried out to data based on the neutral net of deep learning.Detection pair and long-term powered contrast examination of at least two electronic mutual inductors in terms of precision, harmonic detecting performance, bandwidth performance stability can be achieved in the invention.
Description
Technical field
The present invention relates to electrical technology and equipment technical field, more particularly, to a kind of electronic mutual inductor band electroanalysis system
System.
Background technology
With development of the power system to high-voltage large current direction, traditional electromagnetic current transducer is although compare into
It is ripe, but exist volume it is big and in the engineering technology such as heaviness, installation difficulty, cost height, insulation system complexity, magnetic saturation phenomenon not
Foot.Magnetic saturation, complex for insulation, blast, two be present in conventional power transmission and transformation field medium and long-term applications in conventional electromagnetic current transformer
Secondary to open a way the shortcomings of dangerous, with the rise of line voltage grade, existing electromagnetic transformer can not meet intelligent substation
Demand.In Intelligent transformer station, electronic mutual inductor is more and more applied.
State Grid Corporation of China employs various types of electronic types in digitlization and Intelligent transformer station Pilot project construction stage
Transformer, including Rogowski coil, low-power coil, magneto-optic glass, all-fiber current transformator and capacitance partial pressure, optical voltage
Transformer, voltage class covering 10kV-1000kV, obtains the experience of preciousness, starts grinding for series of key techniques problem
Study carefully, such as the research of different electronic mutual inductor performance comparisions.
Different types of electronic mutual inductor has different bandwidth, transient stability, measurement accuracy, and transformer is in above-mentioned side
How is the performance indications in face, is directly connected to the security of development and the operation of power networks of electronic mutual inductor.Therefore, it is necessary to grind
A kind of powered analysis system of electronic mutual inductor is made, realizes the analyzing and processing of electronic mutual inductor longtime running data, is carried out
Different electronic mutual inductor longtime running contrast examinations, study different electronic mutual inductors in bandwidth, harmonic order and electronic type
Contrast in terms of the long-term reliability of transformer.
The content of the invention
Present invention solves the technical problem that it is：A kind of overcome the deficiencies in the prior art, there is provided powered point of electronic mutual inductor
Analysis system, detection of at least two electronic mutual inductors in terms of precision, harmonic detecting performance, bandwidth performance stability can be achieved
Pair and long-term powered contrast examination.
The present invention technical solution be：A kind of powered analysis system of electronic mutual inductor, the analysis system include M
Individual measurement apparatus, failure wave-recording, failure logging and network analyzing apparatus and host computer, M >=1, wherein：
M measurement apparatus, including electronic mutual inductor and combining unit, electronic mutual inductor are used for gathering power network measured point
Current data or voltage data are exported to combining unit, and combining unit beats the current data collected or voltage data
Upper system markers, form electric current message according to default form and send to failure wave-recording and Network records analytical equipment, failure record
Involve Network records analytical equipment and receive the data that each combining unit is sent, and to data record, storage；Host computer extracts one
Divide electric current or voltage data to carry out wavelet transformation, obtain wavelet conversion coefficient matrix, the wavelet conversion coefficient matrix is entered
Row singular value decomposition, characteristic vector is obtained, then using characteristic vector as sample data, power network shape is judged according to sample data training
The neural network model of state, the neural network model for judging electric network state obtained according to training is to all electric currents or voltage number
According to progress electric network state identification, and according to the recognition result of multiple test points or two different electronics of same test point
Formula transformer measurement result is analyzed.
Before the host computer carries out singular value decomposition to the wavelet conversion coefficient matrix, using Birge-Massart
Threshold strategies carry out dimension-reduction treatment to wavelet conversion coefficient matrix.
The neural network model for judging electric network state is error-duration model neutral net.
The synchronous code of the combining unit real-time reception outside input, according to the synchronization code signal, produce synchronised clock letter
Number, it is synchronous with passive electrical type current transformer to enter row clock according to synchronizing clock signals.
The synchronous code is IRIG-B codes.
The combining unit with electronic mutual inductor enters row clock, and synchronously a kind of method is：Combining unit receives IRIG-B
Pulse when parsing IRIG-B codes obtain pair after code, produce between pulse at two Duis uniform N number of pulse as it is synchronous when
Clock signal, and synchronizing clock signals are sent to electronic mutual inductor, electronic mutual inductor utilizes the electric current of multiple sampling instants
Data enter row interpolation using the method for linear interpolation or parabola interpolation, obtain combining unit transmission synchronised clock rising edge or
Current data or voltage data corresponding to person's trailing edge, and the current data or voltage data are postponed predetermined m and adopted
Sent after the sample clock cycle mutual from electronic type in rising edge or the trailing edge extraction of synchronised clock to combining unit, combining unit
Sensor sends current data, after receiving current data or voltage data, according to the synchronised clock rising edge or trailing edge
Jumping moment subtracts the delay of m+1 clock cycle, obtain current data or at the time of voltage data corresponds to as system when
Mark, finally, markers and current data or voltage data framing are sent to failure wave-recording and Network records analytical equipment.
The combining unit enters the synchronous another method of row clock with electronic mutual inductor：Combining unit receives
Pulse when IRIG-B codes obtain pair is parsed after IRIG-B codes, produces uniform N number of pulse conduct between pulse at two pairs
Synchronizing clock signals；Electronic mutual inductor produces the local sampling clock of identical frequency, and uses and be higher than the local sampling clock
Clock current signal is sampled, row interpolation is entered according to sampled data, obtains local sampling clock trailing edge or rising
Electronic mutual inductor markers is stamped along the current data or voltage data at corresponding moment, target when will carry electronic mutual inductor
Sent after current data or the interval delta T of voltage data delay fixation to combining unit, combining unit and receive current data
Row interpolation either is entered to current data or voltage data after voltage data, obtains combining unit synchronizing clock signals trailing edge
Either current data corresponding to rising edge or voltage data, and at the time of according to current data or voltage data is received
Fixed interval delta T is subtracted to obtain as system markers at the time of interpolated data corresponds to, finally, by markers and current data framing
Send.
Described default form is IEC61850-9-2 protocol massages forms.
The present invention compared with prior art the advantages of be：
(1), the powered analysis system of electronic mutual inductor in the present invention, system building simple possible, installation site is flexible, grinds
It is relatively low to study carefully cost, may be implemented in data acquisition in the case of Practical Project charging operation, does not interfere with the operation of engineering；
(2), Large Copacity realizes electronic mutual inductor in failure wave-recording and Network records analytical equipment in the present invention
Long-play data acquisition, and failure wave-recording and Network records analytical equipment quickly can copy big data with network interface
Out carry out off line data analysis；
(3), host computer carries out wavelet analysis by Labview softwares in the present invention, can be with two kinds of contrasts of off-line analysis
Performance integrate examining electronic mutual inductor in terms of bandwidth, in terms of harmonic order and in terms of the longtime running stability of precision
Core is appraised through comparison；
(4), combining unit of the present invention realizes system clock synchronization by the method for synchronised clock and data interpolating, reduces
The difficulty of data processing, facilitates multichannel.
(5), host computer uses the side that wavelet transformation and the neural network model based on deep learning are combined in the present invention
Method judges the state of power network, and method adaptive ability is strong, precision is high, real-time is good.
Brief description of the drawings
Fig. 1 is the powered analysis system structure chart of electronic mutual inductor of the present invention；
Fig. 2 is the powered analysis system host computer functional framework figure of electronic mutual inductor of the present invention；
Fig. 3 is combining unit of the embodiment of the present invention and the first method of synchronization timing diagram of passive electrical type current transformer；
Fig. 4 is combining unit of the embodiment of the present invention and second of method of synchronization timing diagram of passive electrical type current transformer.
Embodiment
With reference to Figure of description and specific embodiment, the present invention is described in detail.
The invention provides a kind of powered analysis system of electronic mutual inductor, the system can realize two kinds of electronic mutual inductors
Detection pair and long-term powered contrast examination in terms of precision, harmonic detecting performance, bandwidth performance stability.With reference to attached
Figure is described in detail.
As shown in figure 1, a kind of powered analysis system example of electronic mutual inductor includes the first electronic mutual inductor 1-1, the
Two electronic mutual inductor 1-2, the first combining unit 2-1, the second combining unit 2-2, failure wave-recording and Network records analytical equipment 3
With host computer 4.The electronic mutual inductor 1-1 is connected with the combining unit 2-1, forms the first measurement apparatus, the electronics
Formula transformer 1-2 is connected with the combining unit 2-2, forms the second measurement apparatus.
In first measurement apparatus and the second measurement apparatus electronic mutual inductor be used for gather power network measured point current data or
Person's voltage data is exported to combining unit, and the current data collected or voltage data are stamped system markers by combining unit,
Electric current message is formed according to default form to send to failure wave-recording and Network records analytical equipment；The electronic mutual inductor can
It can also be voltage transformer to think current transformer, can be that active electronic mutual inductor can also be passive type electronic type
Transformer.The electronic mutual inductor data are transferred to combining unit by IEC61850 9-2 agreements.If necessary to measure simultaneously
The electric current and voltage of multiple test points, can connect and extend to M measuring unit, M >=1 in power network.
Failure wave-recording and Network records analytical equipment, receive the data that each combining unit is sent, and to data record, deposit
Storage, while communications status is also monitored in real time, if it find that it is abnormal to occur communication overtime, communication disruption, Traffic Anomaly etc. in network
State, warning message is provided immediately.Gathered data is stored using big capacity hard disk in failure wave-recording and Network records analytical equipment,
Data storage form is pcap forms.Failure wave-recording and Network records analytical equipment quickly can copy out big data with network interface
To carry out off line data analysis.
Upper computer software is changed to the data format of collection and carries out off-line analysis.
As described in Figure 2, the specific data analysis step of host computer includes：
(1) the curtage data that electronic mutual inductor is sent, are opened, Fourier's frequency-domain analysis is carried out to the data,
Virtual value, the phase information of each harmonic of data are obtained, and exports analysis result in a tabular form.
(2) state warning information statistical analysis, is carried out to data, obtains alerting total, most short alarm time, most long alarm
Time, the adjacent Mean Time Between Replacement alerted twice, and analysis result is exported in a tabular form.
(3) noise analysis, is carried out to data, using Allan methods of analysis of variance, calculate the zero bias of data, quantizing noise, with
Machine migration coefficient, zero bias unstability, and analysis result is exported in a tabular form.
(4), extract one part of current or voltage data carries out wavelet transformation, obtain wavelet conversion coefficient matrix, small echo
Wavelet transform is transformed to, successively decomposes current signal using Mallat algorithms, low frequency signal and height are divided into per layer signal
Frequency signal two parts, after the completion of conversion, obtain a series of wavelet coefficients, directly from these coefficients form the feature of pattern-recognition to
Amount, has a bulk redundancy, therefore uses Birge-Massart threshold strategies to carry out dimension-reduction treatment to wavelet coefficient vector, after dimensionality reduction
Wavelet coefficient form wavelet conversion coefficient matrix, singular value decomposition is carried out to the matrix, obtains characteristic vector, then with feature to
Amount is used as sample data, and the neural network model of electric network state, the judgement obtained according to training are judged according to sample data training
The neural network model of electric network state carries out power network measured point state recognition to all electric currents or voltage data, and according to multiple
Two different electronic mutual inductor measurement results of the recognition result of test point or same test point are analyzed.It is described
Judge the neural network model of electric network state for error-duration model neutral net (Error Back Propagation Neural
Network), referred to as BP neural network.The electric network state, which is tested dotted state, includes electric current interruption, electric current rise, electric current drop
Low, transient state pulse, transient oscillation state.The BP neural network is five layers of neutral net, including input layer, output layer and three
Layer hidden layer, its output layer set 5 nodes, i.e., { 1,0,0,0,0 }, { 0,1,0,0,0 }, { 0,0,1,0,0 }, { 0,0,0,1,0 },
{ 0,0,0,0,1 }, electric current interruption, electric current rise, current reduction, transient state pulse, transient oscillation are represented respectively.Training is judged
The neutral net of electric network state.The method that this neural network model using wavelet transformation and based on deep learning is combined is sentenced
The method for powering off the state of net, identification project can be adjusted dynamically, and adaptive ability is strong.
In order to realize data syn-chronization, the first electronic mutual inductor 1-1, the second electronic mutual inductor 1-2, the first combining unit
2-1, the second combining unit 2-2, failure wave-recording and Network records analytical equipment 3 are the homologous design of clock.
The synchronous code of combining unit real-time reception outside input, according to the synchronization code signal, produce synchronizing clock signals, root
It is synchronous with passive electrical type current transformer to enter row clock according to synchronizing clock signals.The synchronous code is IRIG-B codes.
As shown in figure 4, the combining unit with passive electrical type current transformer enters row clock, synchronously a kind of method is：Close
And unit receives and pulse when IRIG-B codes obtain pair is parsed after IRIG-B codes, produce between pulse at two Duis uniform
4000 pulses are sent to passive electrical type current transformer, passive electrical as synchronizing clock signals, and by synchronizing clock signals
Type current transformer is inserted using the current data of multiple sampling instants using the method for linear interpolation or parabola interpolation
Value, current data corresponding to the synchronised clock rising edge or trailing edge of combining unit transmission is obtained, and the current data is prolonged
Sent after 1 predetermined late sampling clock cycle to combining unit, rising edge or trailing edge of the combining unit in synchronised clock
Extraction sends current data from electric mutual inductor, after receiving current data, according to the synchronised clock rising edge or trailing edge
Jumping moment subtracts the delay of 2 clock cycle, obtains as markers at the time of current data corresponds to, finally, by markers and electricity
Flow data framing is sent to failure wave-recording and Network records analytical equipment.
As shown in figure 4, the combining unit and passive electrical the type current transformer another method that to enter row clock synchronous
For：Combining unit, which receives, parses pulse when IRIG-B codes obtain pair after IRIG-B codes, is produced between pulse at two Duis
Uniform N number of pulse is as synchronizing clock signals；Passive electrical type current transformer produces the local sampling clock of identical frequency,
And current signal is sampled using the clock higher than the local sampling clock, row interpolation is entered according to sampled data, obtains this
The current data that ground sampling clock trailing edge or rising edge correspond to the moment stamps local markers, target electric current when will carry local
Sent after the interval delta T (250 μ s) that data delay is fixed to combining unit, combining unit receives current data afterwards to electric current
Data enter row interpolation, obtain current data corresponding to combining unit synchronizing clock signals trailing edge or rising edge, and according to
Fixed interval delta T is subtracted at the time of receiving current data to obtain at the time of interpolated data corresponds to as markers, finally, by when
Mark and current data framing are sent.
Above-mentioned combining unit is realized synchronous with clock by the method for synchronised clock and data interpolating, is reduced at data
The difficulty of reason, facilitates multichannel to integrate.
Combining unit can also directly receive outside input pair when pulse, produce between pulse at two Duis uniform
4000 pulses are as synchronizing clock signals.
The content not being described in detail in specification belongs to the known technology of those skilled in the art.
Claims (8)
- A kind of 1. powered analysis system of electronic mutual inductor, it is characterised in that M measurement apparatus, failure wave-recording, failure logging and Network analyzing apparatus and host computer, M >=1, wherein：M measurement apparatus, including electronic mutual inductor and combining unit, electronic mutual inductor are used for gathering power network measured point electric current Data or voltage data are exported to combining unit, and the current data collected or voltage data are stamped and are by combining unit Unite markers, form electric current message according to default form and send to failure wave-recording and Network records analytical equipment, failure wave-recording and Network records analytical equipment receives the data that each combining unit is sent, and to data record, storage；Host computer extraction part electricity Stream or voltage data carry out wavelet transformation, obtain wavelet conversion coefficient matrix, the wavelet conversion coefficient matrix are carried out strange Different value is decomposed, and obtains characteristic vector, then using characteristic vector as sample data, judges electric network state according to sample data training Neural network model, all electric currents or voltage data are entered according to the neural network model for judging electric network state that training obtains The identification of row electric network state, and it is mutual according to the recognition result of multiple test points or two different electronic types of same test point Sensor measurement result is analyzed.
- A kind of 2. powered analysis system of electronic mutual inductor according to claim 1, it is characterised in that the host computer pair Before the wavelet conversion coefficient matrix carries out singular value decomposition, using Birge-Massart threshold strategies to wavelet transformation system Matrix number carries out dimension-reduction treatment.
- A kind of 3. powered analysis system of electronic mutual inductor according to claim 1, it is characterised in that the judgement power network The neural network model of state is error-duration model neutral net.
- A kind of 4. powered analysis system of electronic mutual inductor according to claim 1, it is characterised in that the combining unit The synchronous code of real-time reception outside input, according to the synchronization code signal, produce synchronizing clock signals, according to synchronizing clock signals with Passive electrical type current transformer enters row clock synchronization.
- 5. the powered analysis system of a kind of electronic mutual inductor according to claim 4, it is characterised in that the synchronous code is IRIG-B codes.
- A kind of 6. powered analysis system of electronic mutual inductor according to claim 5, it is characterised in that the combining unit Entering row clock with electronic mutual inductor, synchronously a kind of method is：Parsing IRIG-B codes obtain after combining unit receives IRIG-B codes To pair when pulse, at two pairs produce uniform N number of pulse between pulse believes as synchronizing clock signals, and by synchronised clock Electronic mutual inductor number is sent to, electronic mutual inductor uses linear interpolation or parabolic using the current data of multiple sampling instants The method of line interpolation enters row interpolation, obtains current data corresponding to the synchronised clock rising edge or trailing edge of combining unit transmission Or voltage data, and sent after the current data or voltage data are postponed into m predetermined sampling clock cycle to merging Unit, combining unit send current data from electronic mutual inductor in rising edge or the trailing edge extraction of synchronised clock, received After current data or voltage data, m+1 clock is subtracted according to the synchronised clock rising edge or trailing edge jumping moment The delay in cycle, current data is obtained or at the time of voltage data corresponds to as system markers, finally, by markers and electric current number According to or voltage data framing send to failure wave-recording and Network records analytical equipment.
- A kind of 7. powered analysis system of electronic mutual inductor according to claim 5, it is characterised in that the combining unit Entering the synchronous another method of row clock with electronic mutual inductor is：Combining unit parses IRIG-B after receiving IRIG-B codes Pulse when code obtains pair, uniform N number of pulse is produced as synchronizing clock signals between pulse at two pairs；Electronic type mutual inductance Device produces the local sampling clock of identical frequency, and current signal is adopted using the clock higher than the local sampling clock Sample, row interpolation is entered according to sampled data, obtain local sampling clock trailing edge or rising edge correspond to the moment current data or Person's voltage data stamps electronic mutual inductor markers, and target current data or voltage data prolong when will carry electronic mutual inductor When the interval delta T fixed after send to combining unit, combining unit is received after current data or voltage data to electric current Data or voltage data enter row interpolation, obtain electric current number corresponding to combining unit synchronizing clock signals trailing edge or rising edge According to or voltage data, and obtained according to fixed interval delta T is subtracted at the time of receiving current data or voltage data As system markers at the time of interpolated data corresponds to, finally, markers and current data framing are sent.
- 8. a kind of transformer station's current synchronization harvester based on active electronic type instrument transformer according to claim 1, its It is characterised by：Described default form is IEC61850-9-2 protocol massages forms.
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| CN109142839A (en) * | 2018-08-21 | 2019-01-04 | 南京南瑞继保电气有限公司 | A kind of binary channels mutually verifies electronic mutual inductor |
| CN109283406A (en) * | 2018-08-13 | 2019-01-29 | 中国南方电网有限责任公司超高压输电公司梧州局 | Current loop based on whole station date comprision monitors system |
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| CN109375139A (en) * | 2018-11-06 | 2019-02-22 | 国网内蒙古东部电力有限公司电力科学研究院 | A kind of device and method of automatic testing light fiber current mutual inductor |
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Application publication date: 20180406 |