CN201530331U - Electrified railway feed line protection, measurement, and control device suitable for passenger special line - Google Patents

Abstract

The utility model relates to an electrified railway feed line protection, measurement, and control device suitable for a passenger special line. The device mainly comprises a signal plug-in component and a protection plug-in component, wherein the signal plug-in component comprises a current increment module, an overload module, a PT wire break module and a circuit breaker failure module which are respectively connected with the protection plug-in component; the device further comprises an interface plug-in component, a power supply plug-in component, an outlet plug-in component and an AC (alternating current) plug-in component, wherein the interface plug-in component is respectively connected with the power supply plug-in component, the outlet plug-in component and the protection plug-in component; and the power supply plug-in component, the outlet plug-in component and the AC plug-in component are respectively connected with the protection plug-in component. The device not only has the functions of current increment protection, inverse time limit overload protection, circuit breaker failure protection and the like, but also can detect the PT wire break, thereby further improving the equipment quality.

Description

Be applicable to the electric railway protection for feed line measure and control device of railway line for passenger traffic

Technical field

The utility model relates to the electric railway field, specifically is meant a kind of electric railway protection for feed line measure and control device that is applicable to railway line for passenger traffic.

Background technology

In recent years; the technical merit of China's traction substation of electric railway secondary device has had very much progress; achievement is obvious to all; but in the practice process, still there are a lot of problems; for example design is complicated, need spend a large amount of man power and materials during maintenance and carry out fault detection, just can keep in repair then; thereby waste a large amount of time and efforts, and then it is not yet in place to illustrate that also China's prior art is done at aspects such as unit protection and fault self-checkings.

The utility model content

Technical problem to be solved in the utility model provides a kind of electric railway protection for feed line measure and control device that is applicable to railway line for passenger traffic; it not only has functions such as current increment protection, inverse time lag overload protection, breaker fail protection; but also can carry out the PT burn out detection; thereby further improved equipment quality, and brought bigger convenience to the maintainer.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: the electric railway protection for feed line measure and control device that is applicable to railway line for passenger traffic; mainly constitute, also include the current increment module, overload module, PT broken string module, the breaker failure module that link to each other with the protection plug-in unit respectively in described signal plug-in unit inside by signal plug-in unit and protection plug-in unit.

In order better to realize the utility model; this is applicable to that the electric railway protection for feed line measure and control device of railway line for passenger traffic also includes interface card, power insert, outlet plug-in unit and exchanges plug-in unit; described interface card links to each other with power insert, outlet plug-in unit and protection plug-in unit respectively, and described power insert, outlet plug-in unit and interchange plug-in unit also link to each other with the protection plug-in unit respectively.

Further, also be provided with power module in described signal plug-in unit, described power module links to each other with interface card.

With the equipment access network, described interface card is provided with the communication plug-in unit that adopts the plug-in card mode and support redundant optical fiber self-healing dual-ring network structure for convenience.

Further for convenience equipment inserts some other external plug-in, and when carrying out the school at any time, described interface card also includes the RS232 serial ports or the USB interface of a standard, and interface during the GPS school of a standard.

To sum up, the beneficial effects of the utility model are: this is applicable to that the electric railway protection for feed line measure and control device of railway line for passenger traffic is applicable to the traction net feeder line of electric railway direct supply, BT power supply and AT power supply; Feeder line is had the protection of self-adaptive current increment, inverse time lag overload protection, breaker fail protection and PT burn out detection function, strengthened the alerting ability that uses, and improved the ability that device is hided and loaded.

Description of drawings

Fig. 1 is an integral structure scheme drawing of the present utility model.

Fig. 2 is the utility model interface card inner structure scheme drawing.

Fig. 3 is the utility model protection plug-in unit inner structure scheme drawing.

Fig. 4 realizes functional block diagram for the protection of the utility model current increment.

Fig. 5 is that the utility model PT burn out detection function realizes functional block diagram.

The specific embodiment

Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.

Embodiment

As shown in Figure 1, this is applicable to the electric railway protection for feed line measure and control device of railway line for passenger traffic, mainly constitute, also include the current increment module, overload module, PT broken string module, the breaker failure module that link to each other with the protection plug-in unit respectively in described signal plug-in unit inside by signal plug-in unit and protection plug-in unit; This is applicable to that the electric railway protection for feed line measure and control device of railway line for passenger traffic also includes interface card, power insert, outlet plug-in unit and exchanges plug-in unit, described interface card links to each other with power insert, outlet plug-in unit and protection plug-in unit respectively, and described power insert, outlet plug-in unit and interchange plug-in unit also link to each other with the protection plug-in unit respectively; Also be provided with power module in described signal plug-in unit, described power module links to each other with interface card; Described interface card is provided with the communication plug-in unit that adopts the plug-in card mode and support redundant optical fiber self-healing dual-ring network structure; Described interface card also includes the RS232 serial ports or the USB interface of a standard, and interface during the GPS school of a standard.

As shown in Figure 2, described interface card inside also comprises FLASH, SRAM memory device, CPU and communication plug-in unit, hardware clock and I/O CPLD, described FLASH, SRAM memory device, CPU and communication plug-in unit, hardware clock and I/O CPLD link to each other with bus respectively, its inside also is provided with WATCHDOG, and described WATCHDOG directly links to each other with described CPU.

As shown in Figure 3; described protection plug-in unit inside also includes CPU, digital signal processor, program store FLASH, definite value and reporting memory FLASH and data memory SRAM; described CPU, digital signal processor, program store FLASH, definite value and reporting memory FLASH and data memory SRAM link to each other with bus respectively; portion also includes 16 A/D converters within it, and is provided with the amount of leaving and opens into the amount interface.

This electric railway feeder protection equipment can be realized current increment protection, inverse time lag overload protection, breaker fail protection and the PT burn out detection to feeder line, and its principle is as follows:

(1) current increment protection

A) operation equation

ΔI＝I ₁-I′ ₁-K _h(I ₂+I ₃+I ₅-I′ ₂-I′ ₃-I′ ₅)≥ΔI _ZD

B) harmonic wave locking

I ₂/I ₁≥K _YL

Wherein: I ₁, I ' ₁---the preceding feeder line fundamental current of a current and cycle;

I ₂, I ₃, I ₅---when the first two, three, the quintuple harmonics electric current;

I ' ₂, I ' ₃, I ' ₅---a cycle the first two, three, the quintuple harmonics electric current;

K _h---harmonic wave weighting rejection coefficient;

Δ I _ZD---current increment protection setting valve;

K _YL---second harmonic locking setting valve.

It realizes block diagram as shown in Figure 4.

(2) inverse time lag overload protection

This device is established the inverse time lag overload protection.When contact system is answered tripping feeder line short circuiting device because of long-term big electric current heating when acquiring a certain degree, to guarantee traffic safety.This device provides three kinds of curves that meet the IEC255-3 anti-time limit characteristic.In real-world operation, the user can select suitable anti-time limit characteristic according to actual needs.

A) the general inverse time lag

$t=\frac{0.14}{{\left(\frac{I}{I_{\mathrm{GF}}}\right)}^{0.02}-1}\×\frac{T_{\mathrm{GF}}}{10}$

B) inverse time lag very

$t=\frac{13.5}{\frac{I}{I_{\mathrm{GF}}}-1}\×\frac{T_{\mathrm{GF}}}{10}$

C) limit inverse time lag

$t=\frac{80}{{\left(\frac{I}{I_{\mathrm{GF}}}\right)}^2-1}\×\frac{T_{\mathrm{GF}}}{10}$

In the formula: I _GF---electric current threshold setting valve;

T _GF---the time constant setting value.

(3) breaker fail protection

After device sends the order of closing a floodgate (reclosing or remote control are closed a floodgate),, then provide breaker failure signal (idle contact) if circuit breaker (switch motion time) in setting time does not move.

After device sends trip signal (protection tripping operation or remote control tripping operation); if circuit breaker not action in 500ms (protection tripping operation) or setting switch opening time (remote control tripping operation); then provide breaker failure signal (idle contact), the protection tripping operation provides the report on incident of breaker failure when malfunctioning.

(4) PT burn out detection

Its functional schematic block diagram as shown in Figure 5.

As mentioned above, just can realize the utility model preferably.

Claims (5)

1. be applicable to the electric railway protection for feed line measure and control device of railway line for passenger traffic; it is characterized in that; mainly constitute, also include the current increment module, overload module, PT broken string module, the breaker failure module that link to each other with the protection plug-in unit respectively in described signal plug-in unit inside by signal plug-in unit and protection plug-in unit.

2. the electric railway protection for feed line measure and control device that is applicable to railway line for passenger traffic according to claim 1; it is characterized in that; also include interface card, power insert, outlet plug-in unit and exchange plug-in unit; described interface card links to each other with power insert, outlet plug-in unit and protection plug-in unit respectively, and described power insert, outlet plug-in unit and interchange plug-in unit also link to each other with the protection plug-in unit respectively.

3. the electric railway protection for feed line measure and control device that is applicable to railway line for passenger traffic according to claim 2 is characterized in that also be provided with power module in described signal plug-in unit, described power module links to each other with interface card.

4. the electric railway protection for feed line measure and control device that is applicable to railway line for passenger traffic according to claim 2 is characterized in that, described interface card is provided with the communication plug-in unit that adopts the plug-in card mode and support redundant optical fiber self-healing dual-ring network structure.

5. the electric railway protection for feed line measure and control device that is applicable to railway line for passenger traffic according to claim 2 is characterized in that described interface card also includes the RS232 serial ports or the USB interface of a standard, and interface during the GPS school of a standard.

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