CN205427099U - Power continuous lines RTU device is maked somebody a mere figurehead to railway based on active signal - Google Patents

Abstract

The utility model discloses a power continuous lines RTU device is maked somebody a mere figurehead to railway based on active signal, including the host processing ware, the host processing ware passes through communication module and follows processor communicate from treater, third from treater and fourth from treater, second with first, first input from the treater is connected with multichannel voltage transformer, multichannel current transformer is connected from the input of treater to the second, the third passes through digital input module connection multichannel photoelectric isolation module from the input of treater, the fourth passes through digital output module connection multicircuit relay photoelectric isolation module from the output of treater. Fault finding for railway power line provides the effective means, has shortened the error detection time greatly, has realized rush repair, has reduced the failure interruption time, satisfies that railway electric power power supply is reliable, economical rationality, use maintain convenient requirement.

Description

Power continuous line RTU device maked somebody a mere figurehead by railway based on active signal

Technical field

This utility model relates to railway and makes somebody a mere figurehead power continuous line online Fault Identification field, particularly relates to railway based on active signal and makes somebody a mere figurehead power continuous line fault detect RTU device.

Background technology

The power supply system of China's general speed railway typically uses the built on stilts power continuous line power supply mode through pressure regulator, and its system earth mode is isolated neutral, through small current neutral grounding modes such as grounding through arc.Can continue to run with after this mode of connection generation singlephase earth fault, thus substantially increase the power supply availability of power circuit.But owing to after there is single-phase earthing, its healthy phases voltage-to-ground is increased to 1.73 times, its line insulation will bear high voltage, so cannot get rid of after when fault is little more than 2, it is still desirable to have a power failure, after pending fault eliminating, power transmission puts into operation again.

At present, in order to realize the isolation of built on stilts power continuous line singlephase earth fault, many by having with the RTU device of long-range remote control function, by manual type subsection opening and closing line switching, it is achieved fault location and isolation, and by the artificial line walking localization of faults.This method complex operation step, malfunction elimination is the most, it is impossible to adapt to that power supply safety is suitable for by railway power electric power system, power supply is reliable, economical rationality, the convenient requirement of working service.Currently, there is no effective RTU device and carry out the singlephase earth fault location monitoring automatically of small current neutral grounding system, and backstage, control centre will be delivered on fault-signal, to realize the automatic decision of fault, railway is maked somebody a mere figurehead the online singlephase earth fault location of power continuous line fault and is still belonged to blank.

Utility model content

The purpose of this utility model is contemplated to solve the problems referred to above, provide a kind of railway based on active signal and make somebody a mere figurehead power continuous line RTU device, realize residing case change low tension loop fault and load monitors in real time, malfunction elimination for railway electric power supply line improves effective means, substantially reduces trouble shooting time.

To achieve these goals, this utility model adopts the following technical scheme that

Power continuous line RTU device maked somebody a mere figurehead by railway based on active signal, including primary processor, described primary processor by communication module with first from processor, second from processor, the 3rd from processor and the 4th from processor communication；Described first has plurality of voltages transformer from the input connection of processor；Second connects Multi-path electricity current transformer from the input of processor；3rd connects multichannel photoelectric isolation module from the input of processor by digital quantity input module；Described 4th connects multicircuit relay photoelectric isolation module from the outfan of processor by digital output module.

Described primary processor is connected with secondary storage module, first from processor, second from processor, the 3rd be connected with an one-level memory module respectively from processor from processor and the 4th.

Described voltage transformer is provided with 6 tunnels.

Described current transformer is provided with 48 tunnels.

Described digital quantity input module connects 96 road photoelectric isolation modules.

Described relay photoelectric isolation module connects 48 tunnels.

Described voltage transformer is connected from the input of processor with described first by the first bandpass filtering modules block and an AD high speed acquisition module.

Described current transformer is connected from the input of processor with described second by the second bandpass filtering modules block and the 2nd AD high speed acquisition module.

There is the memory capacity that 160 cycles are counted on the every road of one-level memory module；There is the memory capacity that 6400 cycles are counted on the every road of secondary storage module, it is ensured that the memory capacity that every road waveform is 40 times.

Breakdown judge principle: after signal exciting bank loads characteristic signal on built on stilts power continuous line, the built on stilts power supply through line road direction load side propagation of this signal edge, and by earth point return signal exciting bank.When RTU device is between signal exciting bank and trouble point, this feature signal will be detected, Single-phase Ground Connection Failure is at the downstream direction in its power supply direction, reporting fault message.Passing through without pumping signal, RTU device can't detect characteristic signal, then this line single phase grounding failure point is at the updrift side in its power supply direction, not reporting fault message.

The beneficial effects of the utility model are:

The utility model proposes and judge that the implementation method of the RTU device of power continuous line singlephase earth fault maked somebody a mere figurehead by railway by monitoring loading characteristic signal automatically.By utilizing characteristic signal on-line monitoring, half period integral algorithm and AD high-speed sampling technology, can solve the problem that the judgement of the judgement of power continuous line singlephase earth fault, phase fault maked somebody a mere figurehead by railway, realize residing case simultaneously and become the real-time monitoring of low tension loop failure wave-recording and load trend curve.Malfunction elimination for railway electric power supply line improves effective means, substantially reduces trouble shooting time, it is achieved that rapid rush-repair, decreases the fault outage time, meet railway power power reliably, economical rationality, the convenient requirement of working service.

Accompanying drawing explanation

Fig. 1 is RTU apparatus structure schematic diagram

Fig. 2 is RTU device present position explanatory diagram；

Fig. 3 is half period integral algorithm principle schematic.

Wherein 1. through aerial cable.

Detailed description of the invention:

With embodiment, this utility model is described further below in conjunction with the accompanying drawings:

As it is shown in figure 1, power continuous line RTU device maked somebody a mere figurehead by railway based on active signal, including primary processor, described primary processor by communication module with first from processor, second from processor, the 3rd from processor and the 4th from processor communication；Described first has plurality of voltages transformer from the input connection of processor；Second connects Multi-path electricity current transformer from the input of processor；3rd connects multichannel photoelectric isolation module from the input of processor by digital quantity input module；Described 4th connects multicircuit relay photoelectric isolation module from the outfan of processor by digital output module.

Primary processor and all of from processor by power supply module be its power supply.

Described primary processor is connected with secondary storage module, first from processor, second from processor, the 3rd be connected with an one-level memory module respectively from processor from processor and the 4th.

Described voltage transformer is provided with 6 tunnels.Described current transformer is provided with 48 tunnels.Described digital quantity input module connects 96 road photoelectric isolation modules.Described relay photoelectric isolation module connects 48 tunnels.

Described voltage transformer is connected from the input of processor with described first by the first bandpass filtering modules block and an AD high speed acquisition module.Described current transformer is connected from the input of processor with described second by the second bandpass filtering modules block and the 2nd AD high speed acquisition module.

RTU device is designed according to 54 tunnels by the sampling module configured from processor and memory module, its AD high-speed sampling module and the 2nd AD high speed acquisition module, total sample frequency 1MHz, each road sample frequency 2kHz.Power frequency component for loop 50Hz, it is ensured that use frequency to get to 40 points at each cycle.The memory capacity design that one-level memory module is counted according to 160, every road cycle, it is ensured that the capacity of data operation.The memory capacity design that secondary storage module is counted according to 6400, every road cycle, it is ensured that the memory capacity that every road waveform is 40 times.Thus, it is achieved place case becomes low tension loop voltage, the collection record ripple of current waveform and trend curve sampling.

As in figure 2 it is shown, in use, RTU device is installed on each point on through aerial cable 1, general 40 to 50 kilometers of through aerial cable 1, and every 10 kilometers arrange RTU device at.When there is singlephase earth fault, signal exciting bank injects characteristic signal to through aerial cable 1, arranges characteristic signal load pulses width in circuit power end distribution substation outlet and is less than 50mS, and amplitude is the sinusoidal character signal waveform of normal duty 3 times.Signal is along line propagation, and is flowed into the earth by Single-phase Ground Connection Failure, and returns to signal exciting bank.RTU device between signal exciting bank and earth point can detect that this waveform.The RTU device being positioned at downstream, trouble point can't detect this waveform.Fault data is uploaded to control centre's monitoring system by communication port by RTU device, and control centre's monitoring system is by may determine that, trouble point receives between the RTU of feedback signal and the RTU not receiving signal for the first time.

Main process, all configure communication module from processor, fault message, recorder data and the exchange of trend curve data can be realized, and store to secondary storage module.And control centre's monitoring system will be delivered in data by primary processor.

This utility model can use half period integral algorithm to judge circuit phase fault.As it is shown on figure 3, the principle of half period integral algorithm is sinusoidal quantity integration of absolute value in any half period is a constant.The a length of 10ms of data window that half-cycle integration method needs, algorithm itself has certain filter capacity.The positive-negative half-cycle of even high fdrequency component is cancelled out each other in power frequency half-cycle integration completely, and odd harmonic fails to be completely counterbalanced by, but its impact is the least how, but it can not suppress DC component, therefore uses reload signal isolation sampling CT, and weakener affects.For protection less demanding for operational precision, use this algorithm can improve protection speed of action in the case of catastrophe failure.

Half period integral algorithm according to be sinusoidal quantity integration of absolute value in any half period be constant s, and with sampling start angle unrelated.

$S={\∫}_0^{\frac{T}{2}}{U}_{m}sin\mathrm{\ω}tdt=-\frac{U_m}{\mathrm{\ω}}cos\mathrm{\ω}t{|}_0^{\frac{T}{2}}=\frac{2}{\mathrm{\ω}}{U}_m=\frac{T}{\mathrm{\π}}{U}_m---\left(1\right)$

I.e. SIN function half-cycle integration is directly proportional to its amplitude.

The integration of formula (1) can be obtained by trapezoidal rule approximation:

$S\≈\[\frac{1}{2}\left|u_0\right|+\underset{k=1}{\overset{N/2-1}{\mathrm{\Σ}}}\left|u_k\right|+\frac{1}{2}\left|u_{N/2}\right|\]T_s---\left(2\right)$

U in formula_kKth sampled value；

Sampling number in N mono-cycle T；

u_kSampled value during k=0；

u_N/2Sampled value during k=N/2.

After obtaining integrated value S, applying equation (1) can try to achieve amplitude.

Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines; but the not restriction to this utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art need not to pay various amendments or deformation that creative work can make still within protection domain of the present utility model.

Claims (9)

1. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal, it is characterized in that, including primary processor, described primary processor by communication module with first from processor, second from processor, the 3rd from processor and the 4th from processor communication；Described first has plurality of voltages transformer from the input connection of processor；Second connects Multi-path electricity current transformer from the input of processor；3rd connects multichannel photoelectric isolation module from the input of processor by digital quantity input module；Described 4th connects multicircuit relay photoelectric isolation module from the outfan of processor by digital output module.

2. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal as claimed in claim 1, it is characterized in that, described primary processor is connected with secondary storage module, first from processor, second from processor, the 3rd be connected with an one-level memory module respectively from processor from processor and the 4th.

3. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal as claimed in claim 1, it is characterized in that, described voltage transformer is provided with 6 tunnels.

4. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal as claimed in claim 1, it is characterized in that, described current transformer is provided with 48 tunnels.

5. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal as claimed in claim 1, it is characterized in that, described digital quantity input module connects 96 road photoelectric isolation modules.

6. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal as claimed in claim 1, it is characterized in that, described relay photoelectric isolation module connects 48 tunnels.

7. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal as claimed in claim 1, it is characterized in that, described voltage transformer is connected from the input of processor with described first by the first bandpass filtering modules block and an AD high speed acquisition module.

8. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal as claimed in claim 1, it is characterized in that, described current transformer is connected from the input of processor with described second by the second bandpass filtering modules block and the 2nd AD high speed acquisition module.

9. power continuous line RTU device maked somebody a mere figurehead by railway based on active signal as claimed in claim 2, it is characterized in that, there is the memory capacity that 160 cycles are counted on the every road of one-level memory module；There is the memory capacity that 6400 cycles are counted on the every road of secondary storage module, it is ensured that the memory capacity that every road waveform is 40 times.