CN104090244A - Train power supply device detection system - Google Patents
Train power supply device detection system Download PDFInfo
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- CN104090244A CN104090244A CN201410338397.5A CN201410338397A CN104090244A CN 104090244 A CN104090244 A CN 104090244A CN 201410338397 A CN201410338397 A CN 201410338397A CN 104090244 A CN104090244 A CN 104090244A
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Abstract
The invention discloses a train power supply device detection system which comprises a load module, a collecting module, an analysis module and a control module. The load module provides different loads for a train power supply device. The collecting module is used for collecting the load voltage, the positive/negative grounding voltage, the load current, the temperature of a load cabinet and ripple factors of the train power supply device. The analysis module is used for conducting wavelet packet conversion on the load voltage, extracting fault feature vectors and inputting the extracted fault feature vectors to a least square support vector machine so as to recognize faults of the train power supply device. The control module is used for controlling the load module, the collecting module and the analysis module to work. According to the system, the fault feature vectors of the load voltage are extracted through wavelet packet conversion and the faults of the train power supply device are recognized through the least square support vector machine so that the faults of the train power supply device can be recognized and a fault diagnosis result can be obtained; the control module controls the collecting module to collect various parameters, the parameters are detected, and therefore the performance of the train power supply device can be improved.
Description
Technical field
The present invention relates to train power supply device detection field, particularly a kind of train power supply device detection system.
Background technology
Fast development along with rolling stock, passenger train electric power system is turned to gradually by locomotive and is concentrated rectification by Electricity Generation car centralized power supply system, passenger vehicle disperses the future development of the DC600V electric power system of inversion, thereby both improved movement capacity and the traveller's comfort level of passenger train, reached again the object of energy-saving and environmental protection.Train power supply device is the important component part of DC600V electric power system, and can electric supply installation normally move reliability and the security that directly has influence on power supply system of train.Therefore, guarantee the reliability service quality of train power supply device, to improving railway transport of passengers service quality, guaranteeing that passenger train safety, comfortable operation have very important significance.
Yet checkout equipment only detects voltage, electric current, power mostly, only can not judge the state of train power supply device completely by these parameters.Research for the fault diagnosis of train power supply device main circuit is few, and when main circuit breaks down, checkout equipment is difficult to failure judgement classification, more can not accurately locate the position that fault occurs.
Summary of the invention
The present invention cannot carry out the technological deficiency of fault diagnosis in order to overcome in above-mentioned prior art to train power supply device, invented a kind of train power supply device detection system.
For solving the problems of the technologies described above, the invention provides following scheme:
A train power supply device detection system, comprising: load blocks, for described train power supply device provides different loads; Acquisition module, for gathering the load voltage of described train power supply device, positive/negative ground voltage, load current and ripple factor; Analysis module, extracts fault feature vector for load voltage being carried out to wavelet package transforms, and the described fault feature vector input least square method supporting vector machine extracting is carried out to the identification of train power supply plant failure; Control module, carries out work for controlling described load blocks, acquisition module and analysis module.
In technique scheme, described load blocks forms by doing resistive load unit and cooling fan.Described dry resistive load unit consists of the dry resistive load subelement of different gears, and is switched by described control module.Also comprise D.C. contactor, described control module is carried out the switching of the dry resistive load subelement of different gears by described control D.C. contactor.
In technique scheme, described acquisition module comprises: for gathering the voltage acquisition unit of described load voltage; For gathering the current acquisition unit of described load current; For gathering the ripple collecting unit of ripple factor and for gathering the ground voltage collecting unit of positive/negative ground voltage; And temperature collecting cell, for gathering the load cabinet temperature of described train power supply device; And signal condition unit, for the measured signal that various collecting units are gathered, process, make it become the signal that is applicable to detection.
In technique scheme, described ripple collecting unit is high-pass filtering circuit.Described ground voltage collecting unit is electric-leakage detection circuit.
In technique scheme, described control module comprises CPU submodule and the PLC submodule being connected with described CPU submodule.
In technique scheme, also comprise a display module, for showing the parameters of described acquisition module collection and the train power supply plant failure information that described analysis module is analyzed.
Compared with prior art, the present invention has following beneficial effect:
1. the train power supply device detection system in the present invention, by wavelet package transforms, load voltage is extracted to fault feature vector, and the identification of carrying out train power supply plant failure by least square method supporting vector machine, can identify the fault of train power supply device, draw fault diagnosis result.
2. by control module, control acquisition module and gather all kinds of parameters, the detection to all kinds of parameters, can improve the performance of train power supply device;
3. use dry resistive load, floor area is little, environmentally safe.
Accompanying drawing explanation
Fig. 1 is train power supply device detection system structural representation of the present invention;
Fig. 2 is train power supply device detection of electrical leakage schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
Unless separately there is other clearly to represent, otherwise in whole instructions and claims, term " comprises " or its conversion was stated being understood to include as " comprising " or " including " etc. element or ingredient, and do not get rid of other element or other ingredient.
As shown in Figure 1, the train power supply device detection system according to the specific embodiment of the invention, comprising: load blocks 50, acquisition module 20, analysis module 40 and control module 30;
Load blocks 50 provides different loads for train power supply device 10; Load blocks 50 is comprised of dry resistive load unit 501 and cooling fan 502.Dry resistive load unit 501 consists of the dry resistive load subelement of different gears, and also comprise D.C. contactor, control module 30 is carried out the switching of the dry resistive load subelement of different gears by controlling D.C. contactor, i.e. the change in resistance of load is by the break-make of several D.C. contactors and progressively change the series-parallel system of doing resistive load subelement and realize; Use dry resistive load floor area little, environmentally safe, can not exert an influence to operating personnel's health.
Acquisition module 20 comprises voltage acquisition unit 201, current acquisition unit 202, temperature collecting cell 205, ripple collecting unit 203 and ground voltage collecting unit 204; Voltage acquisition unit 201 is voltage sensor, current acquisition unit 202 is current sensor, temperature collecting cell 205 is temperature sensor, by said units, gathers respectively load voltage, load current, load cabinet temperature, ripple factor and the positive/negative ground voltage of train power supply device; The collection of above-mentioned parameter, controls collection by control module 30 respectively.And after above-mentioned parameter collection because being simulating signal, be unfavorable for processing, that is, also comprise a signal condition unit 206, for the simulating signal to be measured that various collecting units are gathered, process, it is become and is applicable to the digital signal that detects.
Because ripple signal is compared DC voltage, its amplitude is less, in order to improve the sampling resolution to ripple signal, ripple collecting unit 203 adopts high-pass filtering circuit (its wave filter adopting is the voltage-controlled type butterworth high pass filter of second order) filtering d. c. voltage signal, remaining ripple signal is amplified, and input effective value arithmetic element together with DC voltage, two-way direct current signal after effective value computing calculates the ratio of the two, can obtain the ripple factor of train power supply device 10 out-put supplies.
As shown in Figure 2, ground voltage collecting unit adopts electric-leakage detection circuit to carry out collection analysis to positive/negative ground voltage, and the electric-leakage detection circuit of train power supply device is by voltage sensor 8, unloaded resistance R
1, R
2(4,6), LC filtering circuit 3, rectification circuit 2, transformer 1, power supply main track resistance to earth R
ground+and stake resistance R (9)
3(7) form, get unloaded resistance R
1, R
2(4,6) resistance is 600 Ω, stake resistance R
3(7) resistance is 750 Ω, and train power supply installation's power source is U
dCfor 600V, detect R
1, R
2(7) midpoint resistance R
b(5), U
bfor R
b(5) voltage, I
r3for the R that flows through
3(7) electric current, U
ground+for R
ground+(9) voltage, can analyze and obtain:
U
ground+=R
ground+i
r3(4)
By formula (1), (2), (3), (4), after arranging, can be derived:
Work as R
ground+during=2000 Ω, by derivation formula (5), can be calculated: U
ground+=196.8V.
Work as R
ground+during=900 Ω, by derivation formula (5), can be calculated: U
ground+=138.4V.
From above analytical calculation, train power supply device main line voltage between lines U
dC=600V, as positive line-to-earth voltage U
ground+during>=197V, insulation detects protection and must be failure to actuate; Work as U
ground+during≤138.4V, insulating monitoring protected location necessarily moves.When train power supply device main line voltage between lines is when DC560V～DC660V scope fluctuates, the positive line-to-earth voltage U drawing according to above-mentioned computing method
ground+numerical value also follow according to certain rules variation.Detection system, according to this principle, is monitored respectively positive and negative voltage docking voltage U
ground+numerical value, just can detect the situation of the positive and negative line Leaked Current of Line to Ground of train power supply device and insulation and detect holding circuit and whether normally work.
By control module 10, control acquisition module 20 and gather all kinds of parameters, detection to all kinds of parameters, can improve the performance of train power supply device 10, and the efficiency that improves the 10 parameters detections of train power supply device, detection system is by automatically controlling process of the test, shortened the cycle, reduced locomotive inspection and repair difficulty, reliability and the security of train power supply device 10 have been improved, changed the present situation of output voltage when test can only be recorded locomotive zero load in storehouse, compare with the dry resistive load equipment of part, adopt the mode combining with control module 30, make control circuit simpler, operability is with maintainable better.
When train power supply device 10 main circuits break down, its output voltage phase-frequency characteristic and amplitude versus frequency characte have obvious variation.With amplitude versus frequency characte, because the system failure changes to the resistance of frequency content and booster action, it can have resistancing action to some frequency content, and other a part of frequency content is had to the effect of reinforcement.Output when train power supply device main circuit breaks down and under normal condition compares, and the energy that same frequency band comprises has larger difference, and the contained energy of partial-band has reduced, and correspondingly other a part of frequency band contained energy has increased.Therefore, the contained energy of frequency band is comprising abundant failure message, and the variation of frequency band energy can represent certain malfunction of system.
The embodiment of the present invention has utilized the thought of " energy is fault " to carry out the identification of fault signature to train power supply device main circuit.The recognition methods of " energy is fault " does not need the model structure of system, but directly to load voltage signal, adopt the very strong wavelet package transforms of local detail analysis ability to carry out Energy extraction, obtain the fault signature of train power supply device main circuit, recycling least square method supporting vector machine is identified fault signature.Analysis module 40 carries out three layers of wavelet package transforms by the load voltage signal of train power supply device main circuit output, the wavelet-packet energy coefficient of the 3rd layer of each node that the WAVELET PACKET DECOMPOSITION of usining obtains is as proper vector, be input to and in least square method supporting vector machine sorter, carry out Fault Identification, and then draw diagnosis.
The method for diagnosing faults that adopts wavelet package transforms and least square method supporting vector machine to combine is diagnosed train power supply device main circuit most common failure, its concrete operation method is: first, analysis module 40 adopts db5 conjugate quadrature filter group to carry out three layers of orthogonal wavelet packet transform to every kind of failure voltage signal, signal frequency is divided in 1000Hz to 8 frequency ranges, the width of each frequency range is 125Hz, as shown in table 1, and according to varying in size of the energy of the first frequency range, all fault types are divided into two large class fault types, the energy of all the other 7 frequency ranges is after normalized, form a 7 degree of freedom proper vector, can reduce significantly the sorter of least square support vector, improved failure modes speed.Secondly, extracting on the basis of proper vector, 7 degree of freedom proper vector sample is formed to training sample, input least square method supporting vector machine carries out the training of fault signature identification.Least square method supporting vector machine classifier design adopts directed acyclic type sorting algorithm structure binary classifier, and adopts Gauss RBF kernel function, its penalty factor=10, nuclear parameter σ
2=25.By the Fault Identification of carrying out in least square method supporting vector machine sorter, and then draw diagnosis.
The frequency range of table 1 signal
The progress of work of above-mentioned load blocks 50, acquisition module 20 and analysis module 40, controls by control module 30, and this control module 30 comprises CPU submodule 301 and the PLC submodule 302 being connected with CPU submodule 301; Make control circuit simpler, operability is with maintainable better.And also comprise a display module 60, for showing the parameters of described acquisition module collection 20 and train power supply device 10 failure messages that described analysis module 40 is analyzed.
During use, detection system is connected with train power supply device 10 by electric connector, then start load to power, the switching of load is realized by control module 30, display module 60 shows the correlation parameter of testing process in real time, and can draw the curves such as load voltage, load current, ripple factor.When train power supply device 10 breaks down, output voltage signal (being load voltage) is analyzed and realized diagnosing main circuit fault, obtain fault analysis result and fault trend.
Detection system realizes many grades of test load switchings, the parameters such as the load voltage of major loop, load current, ripple factor and positive/negative line ground voltage, load cabinet temperature are detected, and realize and data are carried out to analyzing and processing, the functions such as parameter demonstration in real time, curve plotting, main circuit fault analysis.In Wei Ge locomotive depot train power supply device storehouse, science, efficient checkout equipment are provided with outbound test, can more fully detect the properties of train power supply device, solved original train power supply device detection efficiency low, accuracy in detection is not high, and main circuit fault is difficult to the problems such as location.
Finally it should be noted that: above embodiment is only in order to illustrate the present invention and unrestricted technical scheme described in the invention; Therefore, although this instructions has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can modify or be equal to replacement the present invention; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it all should be encompassed in claim scope of the present invention.
Claims (10)
1. a train power supply device detection system, is characterized in that, comprising:
Load blocks, for described train power supply device provides different loads;
Acquisition module, for gathering the load voltage of described train power supply device, positive/negative ground voltage, load current and ripple factor;
Analysis module, extracts fault feature vector for described load voltage being carried out to wavelet package transforms, and the described fault feature vector input least square method supporting vector machine extracting is carried out to the identification of train power supply plant failure;
Control module, carries out work for controlling described load blocks, acquisition module and analysis module.
2. detection system according to claim 1, is characterized in that, described load blocks forms by doing resistive load unit and cooling fan.
3. detection system according to claim 2, is characterized in that, described dry resistive load unit consists of the dry resistive load subelement of different gears, and is switched by described control module.
4. detection system according to claim 3, is characterized in that, also comprises D.C. contactor, and described control module is carried out the switching of the dry resistive load subelement of different gears by described control D.C. contactor.
5. detection system according to claim 1, is characterized in that, described acquisition module comprises:
For gathering the voltage acquisition unit of described load voltage; For gathering the current acquisition unit of described load current; For gathering the ripple collecting unit of ripple factor and for gathering the ground voltage collecting unit of positive/negative ground voltage.
6. detection system according to claim 5, is characterized in that, described acquisition module also comprises:
Temperature collecting cell, for gathering the load cabinet temperature of described train power supply device;
Signal condition unit, processes for the measured signal that various collecting units are gathered, and makes it become the signal that is applicable to detection.
7. according to the detection system described in claim 5-6 any one, it is characterized in that, described ripple collecting unit is high-pass filtering circuit.
8. according to the detection system described in claim 5-6 any one, it is characterized in that, described ground voltage collecting unit is electric-leakage detection circuit.
9. according to the detection system described in claim 1-6 any one, it is characterized in that, described control module comprises CPU submodule and the PLC submodule being connected with described CPU submodule.
10. detection system according to claim 9, is characterized in that, also comprises a display module, for showing the parameters of described acquisition module collection and the failure message of the train power supply device that described analysis module is analyzed.
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| CN106526400A (en) * | 2016-11-28 | 2017-03-22 | 株洲中车时代电气股份有限公司 | Grounding fault diagnosing method and apparatus of DC 600V train power supply system |
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| CN108828393A (en) * | 2018-09-17 | 2018-11-16 | 中车青岛四方车辆研究所有限公司 | DC110V on-line insulation monitoring system and method |
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| CN113281636A (en) * | 2021-05-31 | 2021-08-20 | 山东英信计算机技术有限公司 | Power panel state information recording device and method and fault analysis device and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106526400A (en) * | 2016-11-28 | 2017-03-22 | 株洲中车时代电气股份有限公司 | Grounding fault diagnosing method and apparatus of DC 600V train power supply system |
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| CN108828393A (en) * | 2018-09-17 | 2018-11-16 | 中车青岛四方车辆研究所有限公司 | DC110V on-line insulation monitoring system and method |
| CN112666485A (en) * | 2020-11-25 | 2021-04-16 | 山东云海国创云计算装备产业创新中心有限公司 | Power stability analysis device and power system |
| CN112666485B (en) * | 2020-11-25 | 2022-07-29 | 山东云海国创云计算装备产业创新中心有限公司 | Power stability analysis device and power system |
| CN113281636A (en) * | 2021-05-31 | 2021-08-20 | 山东英信计算机技术有限公司 | Power panel state information recording device and method and fault analysis device and method |
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