CN205620471U - Electrified railway locomotive impedance testing arrangement - Google Patents
Electrified railway locomotive impedance testing arrangement Download PDFInfo
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- CN205620471U CN205620471U CN201620243269.7U CN201620243269U CN205620471U CN 205620471 U CN205620471 U CN 205620471U CN 201620243269 U CN201620243269 U CN 201620243269U CN 205620471 U CN205620471 U CN 205620471U
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Abstract
The utility model discloses an electrified railway locomotive impedance testing arrangement presses variable frequency device VVVF, voltage sensor TV, current sensor TA, voltage current data to gather by multi -winding transformer MT, the straight reversal of friendship and constitutes with analytic system DS. The utility model discloses the influence that testing arrangement accessible change multi -winding transformer MT secondery side winding high voltage output held the voltage of output to come restraint system background harmonic is according to measuring stable state voltage, the current waveform who obtains around the disturbance to the impedance of locomotive under the different frequency is calculated to the undulate quantity of utilizing voltage, electric current. The utility model discloses initial angle from locomotive side impedance test provides new visual angle for studying its crucial build -in attribute - impedance characteristic, further mismatch the low frequency net that causes and presses vibration, harmonic resonance, harmonic unstability, locomotive control system unstability scheduling problem to provide technical support for solving frequent " locomotive - draw net " coupled system impedance that takes place at present.
Description
Technical field
This utility model relates to a kind of electric railway locomotive testing impedance technical field.
Background technology
Ending for the end of the year 2015, china railway revenue kilometres, more than 120,000 kilometers, occupy second place of the world, and wherein high-speed railway 1.9 ten thousand kilometers, rank first in the world, and ensure that the safe and stable operation task of the most extensive electric railway is great.From the point of view of electric railway traffic-operating period for many years; Railway Site frequently reports the tractive power supply system stability problems such as low frequency net pressure vibration, harmonic resonance, harmonic instability, locomotive control unstability; cause locomotive traction block; the high pressure equipment burnout such as protector, spark gap; the lasting amplification of harmonic voltage/current amplitude, Severe distortion; the security incidents such as locomotive control unstability, have a strong impact on the reliability of power supply and the safe operation of railway.
For " locomotive traction net " coupled system, locomotive impedance is the key solving tractive power supply system stability problem with the Proper Match of impedance of traction electric network.Impedance of traction electric network calculates the most perfect with Study on Test Method at present, but for locomotive, owing to control parameter, the component parameter that its Control system architecture is complicated, non-linear element is numerous, internal is the most unknown, these factors make it difficult to be obtained the impedance of locomotive by Theoretical Calculation, the most apparently, domestic not yet there is the special arrangement for electric railway locomotive testing impedance, and relation technological researching is also the most blank.Therefore, in the urgent need to by the means of on-the-spot test, test obtains the impedance operator of actual motion locomotive.This can be that the low frequency net solving the initiation of " locomotive traction net " coupled system impedance mismatch presses the problems such as vibration, harmonic resonance, harmonic instability, locomotive control unstability to provide technical support.
Utility model content
The purpose of this utility model is to provide a kind of electric railway locomotive impedance test device, this device can measure the impedance operator of different model locomotive at Railway Site, thus " locomotive traction net " the coupled system instability problem for solving the most frequently to occur provides technical support.
The technical solution of the utility model is:
A kind of electric railway locomotive impedance test device, by multiwinding transformer MT, hands over orthogonal variable voltage variable frequency device VVVF, voltage sensor TV, current sensor TA, voltage/current data collection and transmission DS to constitute；Multiwinding transformer MT primary side winding accesses local power network 10kV or 35kV voltage, and MT limit winding high voltage outfan of multiwinding transformer has two gears, the first gear output voltage to be 25kV, and the second gear output voltage is 27.5kV；MT limit winding 500V outfan of multiwinding transformer is connected with 25kV or 27.5kV outfan after connecting friendship orthogonal variable voltage variable frequency device VVVF, is locomotive power supply jointly；Voltage sensor TV is connected between contact net T and rail R, and for testing the voltage signal between contact net T and rail R, current sensor TA series connection accesses contact net T, for testing the current signal that contact net T injects to locomotive；Voltage/current data collection and transmission DS receives voltage signal and the current signal of current sensor TA output that voltage sensor (TV) exports, and completes locomotive impedance computation.
Time actually detected, locomotive testing impedance is divided into low-frequency range testing impedance and two kinds of operating modes of high band testing impedance, locomotive testing impedance for low-frequency range, hand over orthogonal variable voltage variable frequency device VVVF input voltage for exchange 500V/50Hz, the frequency-tuning range of output voltage is 1Hz～15Hz, the regulation step-length of frequency is 1Hz, and the range of accommodation of output voltage amplitude is 100V～500V, and the regulation step-length of amplitude is 100V；Locomotive testing impedance for high band, orthogonal variable voltage variable frequency device VVVF input voltage is handed over to keep constant, the amplitude range of accommodation of output voltage and regulation step-length are the most constant, but the frequency-tuning range of output voltage is 25Hz～5000Hz, and the regulation step-length of frequency is 25Hz；
The fluctuation mensuration suppression system background harmonics impact on locomotive impedance is all used in the test of every kind of operating mode, it is used as system disturbance by changing MT limit winding high voltage outfan output voltage of multiwinding transformer, calculates the impedance of locomotive under different frequency according to voltage, the undulate quantity of electric current during generation disturbance.
The beneficial effects of the utility model are:
Stand in the angle of locomotive side testing impedance first, by to actual motion locomotive testing impedance, solve the technical barrier utilizing emulation/Theoretical Calculation cannot accurately obtain locomotive impedance, can be that the problems such as research locomotive key build-in attribute impedance operator provides new visual angle, low frequency net pressure vibration, harmonic resonance, harmonic instability, the locomotive control unstability further caused for " locomotive traction net " the coupled system impedance mismatch solving the most frequently to occur provide technical support.This testing impedance equipment can also be used for the novel locomotive design phase simultaneously, and the damping optimization for novel locomotive designs offer reference data.
Accompanying drawing explanation
Fig. 1 is electric railway locomotive impedance test device pie graph.Wherein, Fig. 1 (a) represents that test device is used for testing the locomotive impedance of high band, and Fig. 1 (b) represents that test device is for testing the locomotive impedance of low-frequency range.
Detailed description of the invention
With detailed description of the invention, this utility model is further elaborated below in conjunction with the accompanying drawings:
The principle of compositionality of this utility model electric railway locomotive impedance test device is: this test device principle of compositionality is as it is shown in figure 1, it is made up of multiwinding transformer MT, friendship orthogonal variable voltage variable frequency device VVVF, voltage sensor TV, current sensor TA, voltage/current data collection and transmission DS；Multiwinding transformer MT primary side winding accesses local power network 10kV or 35kV voltage, and MT limit winding high voltage outfan of multiwinding transformer has two gears, the first gear output voltage to be 25kV, and the second gear output voltage is 27.5kV；MT limit winding 500V outfan of multiwinding transformer is connected with 25kV or 27.5kV outfan after connecting friendship orthogonal variable voltage variable frequency device VVVF, is locomotive power supply jointly；Voltage sensor TV is connected between contact net T and rail R, and for testing the voltage signal between contact net T and rail R, current sensor (TA) series connection accesses contact net T, for testing the current signal that contact net T injects to locomotive；Voltage/current data collection and transmission DS receives voltage signal and the current signal of current sensor TA output of voltage sensor TV output, completes locomotive impedance computation.
The operation principle of electric railway locomotive impedance test device is: this test device is controlled by handing over orthogonal variable voltage variable frequency device VVVF to modulate a frequency, and the adjustable voltage of amplitude, as the excitation of locomotive testing impedance.The voltage U between contact net T and rail R is measured in voltage sensor TV, current sensor TA sampling1With the electric current I injected to locomotive1.Then, regulation MT limit winding high voltage outfan gear of multiwinding transformer so that contact net T electric pressure is increased to 27.5kV from 25kV, and now voltage, electric current can fluctuate, measures the voltage U after fluctuation by detection device2With electric current I2, make magnitude of a voltage fluctuation Δ U=U1-U2, current wave momentum Δ I=I1-I2, then obtain frequency domain voltage and the undulate quantity of frequency domain electric current by Fourier transform, and with frequency domain magnitude of a voltage fluctuation divided by frequency domain current wave momentum, the locomotive impedance under different frequency can be calculated, the method effectively inhibits the interference of system background harmonic wave.
The measurement condition of electric railway locomotive impedance test device is: can be divided into high band testing impedance and two kinds of operating modes of low-frequency range testing impedance, locomotive testing impedance for high band, use the structure of Fig. 1 (a), wherein hand over orthogonal variable voltage variable frequency device VVVF input voltage for exchange 500V/50Hz, the frequency-tuning range of output voltage is 25Hz～5000Hz, the regulation step-length of frequency is 25Hz, and the range of accommodation of output voltage amplitude is 100V～500V, and the regulation step-length of amplitude is 100V.And for the locomotive testing impedance of low-frequency range, use the structure of Fig. 1 (b), it is with the difference of high band impedance test device: the frequency-tuning range handing over orthogonal variable voltage variable frequency device VVVF output voltage is 1Hz～15Hz, the regulation step-length of frequency is 1Hz, and remaining test device and method of testing are constant.Meanwhile, in order to reduce the interference to locomotive impedance of the Traction networks line impedance, it is desirable in test, locomotive is the least with the distance of transformator.Additionally, for improving measuring accuracy, it is desirable to carry out twice locomotive testing impedance.After i.e. completing first time locomotive testing impedance under contact net 25kV electric pressure, contact net electric pressure is increased to 27.5kV, rest working conditions is constant, locomotive is carried out second time testing impedance, observe twice locomotive impedance test results, take the meansigma methods of twice test result when result is more or less the same as final locomotive impedance test results, if result difference is bigger, then need commissioning device again, again test.
Claims (1)
1. an electric railway locomotive impedance test device, it is characterised in that: by multiwinding transformer MT, hand over orthogonal variable voltage variable frequency device VVVF, voltage sensor TV, current sensor TA, voltage/current data collection and transmission DS to constitute；Multiwinding transformer MT primary side winding accesses local power network 10kV or 35kV voltage, and MT limit winding high voltage outfan of multiwinding transformer has two gears, the first gear output voltage to be 25kV, and the second gear output voltage is 27.5kV；MT limit winding 500V outfan of multiwinding transformer is connected with 25kV or 27.5kV outfan after connecting friendship orthogonal variable voltage variable frequency device VVVF, is locomotive power supply jointly；Voltage sensor TV is connected between contact net T and rail R, and for testing the voltage signal between contact net T and rail R, current sensor TA series connection accesses contact net T, for testing the current signal that contact net T injects to locomotive；Voltage/current data collection and transmission DS receives voltage signal and the current signal of current sensor TA output of voltage sensor TV output, completes locomotive impedance computation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620243269.7U CN205620471U (en) | 2016-03-28 | 2016-03-28 | Electrified railway locomotive impedance testing arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620243269.7U CN205620471U (en) | 2016-03-28 | 2016-03-28 | Electrified railway locomotive impedance testing arrangement |
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| CN205620471U true CN205620471U (en) | 2016-10-05 |
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| CN201620243269.7U Withdrawn - After Issue CN205620471U (en) | 2016-03-28 | 2016-03-28 | Electrified railway locomotive impedance testing arrangement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629071A (en) * | 2016-03-28 | 2016-06-01 | 西南交通大学 | Electric railway locomotive impedance testing device and method |
| CN110108947A (en) * | 2019-05-09 | 2019-08-09 | 合肥工业大学 | Disturb the impedance frequency sweep control method of mixed injection |
-
2016
- 2016-03-28 CN CN201620243269.7U patent/CN205620471U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629071A (en) * | 2016-03-28 | 2016-06-01 | 西南交通大学 | Electric railway locomotive impedance testing device and method |
| CN105629071B (en) * | 2016-03-28 | 2018-08-17 | 西南交通大学 | Electric railway locomotive impedance test device and method |
| CN110108947A (en) * | 2019-05-09 | 2019-08-09 | 合肥工业大学 | Disturb the impedance frequency sweep control method of mixed injection |
| CN110108947B (en) * | 2019-05-09 | 2020-09-01 | 合肥工业大学 | Impedance frequency sweep control method for disturbance mixed injection |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161005 Effective date of abandoning: 20180817 |