CN213521411U - Intelligent removing system for faults of electrified railway contact network section - Google Patents

Intelligent removing system for faults of electrified railway contact network section Download PDF

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CN213521411U
CN213521411U CN202022805634.8U CN202022805634U CN213521411U CN 213521411 U CN213521411 U CN 213521411U CN 202022805634 U CN202022805634 U CN 202022805634U CN 213521411 U CN213521411 U CN 213521411U
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power supply
line
control device
circuit breaker
current
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兰旭
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Datong Tongda Luyi Technology Co ltd
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Datong Tongda Luyi Technology Co ltd
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Abstract

The utility model discloses an intelligent removing system for section faults of an electrified railway contact network, which comprises a high-voltage circuit breaker, a disconnecting switch component, a field measurement and control device and a remote control center, wherein the field measurement and control device collects the line current of a special line and a branch line of the contact network in real time; the alternating current and direct current power supply system is provided with an inverter and used for inverting a 110V direct current power supply output by the storage battery into an alternating current 220V power supply to supply power for the railway communication base station; the remote control center receives and displays line current information, switch positions of the high voltage circuit breaker and the disconnector components, and sends a switch-off or switch-on control signal. When short circuit fault occurs, the utility model can rapidly and automatically cut off the fault line, and ensure the normal power supply of the positive line of the contact network without being influenced; meanwhile, under the condition of alternating current loss, the railway communication base station can still be ensured to continue to work normally, the connection between the field control device and the remote control center is established, and the reliability of the system is improved.

Description

Intelligent removing system for faults of electrified railway contact network section
Technical Field
The utility model relates to an electronic railway connecting net technical field, concretely relates to electronic railway connecting net section trouble intelligence excision system.
Background
The rapid development of the electrified railway greatly improves the efficiency of people going out and goods transportation and provides powerful support and guarantee for the high-speed development of China.
The electrified railway contact net divide into main line and branch line, because the branch line is constantly add, the contact net branch line power supply trouble takes place frequently, and can directly influence the power supply of main line after the trouble takes place, consequently, is connected with many branch lines as a main line, and when certain branch line broke down, because of can not cut apart from the main line rapidly, can lead to whole main line to have a power failure and interrupt the transportation, and the area of having a power failure that causes from this is big.
Therefore, the invention patent CN 103066577B discloses an intelligent cutting device, system and method for a contact network line fault, wherein a high-voltage device and a control protection device are arranged on each contact network branch line, so that when a contact network branch line fails, the branch line can be automatically cut off from the positive line, the failed branch line can be accurately determined, the performance is safe and stable, the line fault can be conveniently and quickly processed by workers, and the efficiency of power supply management work is greatly improved. However, this solution also has the following drawbacks:
(1) the power supply device in the control protection device is only used for supplying power for the connection and disconnection of the branch lines of the contact network, and the communication base station cannot communicate with the control center under the condition of alternating current power loss;
(2) the control protection device has limited functions and poor reliability.
In view of this, the existing intelligent fault removal system for the electrified railway contact network section needs to be improved, so that the size and the cost are reduced on one hand; on the other hand, the safety and reliability are improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that current contact net line fault intelligence excision equipment, control protection device function is limited, the relatively poor problem of reliability.
In order to solve the technical problem, the utility model provides an intelligent cutting system of electrified railway contact net district section trouble that adopts, including high-voltage circuit breaker and isolator subassembly, on-the-spot measurement and control device and remote control center, high-voltage circuit breaker and isolator subassembly arrange on each contact net branch line for with contact net private line, branch line cut off or put through from the positive line, on-the-spot measurement and control device includes: including quick-witted case and set up in quick-witted incasement:
the microcomputer measurement and control device is used for collecting the line current of a special line and a branch line of the contact network in real time and sending a switching-off or switching-on control signal to the outdoor high-voltage circuit breaker and the isolating switch component according to the line current;
the alternating current-direct current power supply system comprises a rectifying and charging module, a monitoring module, a storage battery and an inverter, wherein an input alternating current power supply is rectified by the rectifying and charging module to output three 110V direct current control buses, and a control power supply is provided for the microcomputer measurement and control device, the high-voltage circuit breaker and a control loop of the isolating switch assembly; outputting two paths of closing buses to provide a switching power supply for the high-voltage circuit breaker and the isolating switch assembly; outputting a path of storage battery charging power supply for charging the storage battery; the inverter is used for inverting a 110V direct-current power supply output by the storage battery into an alternating-current 220V power supply and providing an alternating-current power supply for the railway communication base station; the monitoring module is used for monitoring the working state of the alternating current and direct current power supply system in real time;
and the remote control center is used for receiving and displaying the line current information sent by the microcomputer measurement and control device, the switch positions of the outdoor high-voltage circuit breaker and the isolating switch assembly, and sending a switching-off or switching-on control signal to the outdoor high-voltage circuit breaker and the isolating switch assembly.
In the above scheme, the rectifying and charging modules are configured as two modules arranged in parallel.
In the above scheme, the chassis is provided with:
the alternating current plug-in is used for converting secondary side current and voltage signals of the TA and the TV into weak current signals;
the CPU plug-in integrates a power supply module and outputs 5V and 24V to input alternating current and direct current of 220V or 110V;
the signal plug-in comprises a signal line terminal, a tripping and closing terminal and a standby lamp terminal;
and the man-machine conversation plug-in is used for keyboard operation, liquid crystal display, signal lamp indication and USB port debugging.
In the scheme, the microcomputer measurement and control device is provided with a low-frequency load shedding function module for locking the low-frequency load shedding function when the frequency exceeds the normal range of 45 Hz-55 Hz in work.
In the scheme, the microcomputer measurement and control device is provided with a PT disconnection locking module and is used for sending out an alarm signal when the PT disconnection is detected.
In the scheme, the microcomputer measurement and control device is provided with a post-reclosing acceleration function module and is used for controlling the high-voltage circuit breaker and the isolating switch assembly to trip in an acceleration mode when current is larger than a preset value after reclosing.
In the above scheme, the microcomputer measurement and control device is provided with a control loop disconnection monitoring module for sending a control loop disconnection warning signal when detecting a control loop fault.
Compared with the prior art, the utility model provides an intelligent removal system of electrified railway contact net section trouble monitors the circuit running state in real time, when short-circuit trouble takes place, according to the judgement to the short-circuit current, automatic removal trouble circuit rapidly, ensures that the contact net positive line normally supplies power, is not influenced; meanwhile, the fault current and the fault message are transmitted to a remote control center through a network, so that a dispatcher is reminded of the line fault, and a basis is provided for the next fault inspection and processing. The system integration level is high, the cost is low, the control protection function is comprehensive, and the reliability is high. The alternating current-direct current power supply system is provided with the inverter, and the inverter is used for inverting a 110V direct current power supply output by the storage battery into an alternating current 220V power supply to provide an alternating current power supply for the railway communication base station, so that the railway communication base station can still work normally under the condition of alternating current power failure, the connection between the field control device and the remote control center is established, and the reliability of the system is improved.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of the on-site measurement and control device of the present invention;
fig. 3 is a schematic diagram of the plug connector of the middle chassis of the present invention.
Detailed Description
The utility model provides an electronic railway contact net district section trouble intelligence excision system can carry out real-time supervision to line running state, protects contact net private line, branch line, when short-circuit fault takes place, according to the judgement to short-circuit current, automatic excision trouble circuit rapidly ensures the contact net positive line normal power supply, is not influenced to effectively dwindle the fault range. Meanwhile, the fault current and the fault message are transmitted to a remote control center through a network, so that a dispatcher is reminded of the line fault, and a basis is provided for the next fault inspection and processing. The system integration level is high, the cost is low, the control protection function is comprehensive, and the reliability is high. The invention is described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1, the utility model provides an intelligent excision system of electrified railway contact net district section trouble, including high voltage circuit breaker and isolator subassembly 10, on-the-spot measurement and control device 20 and remote control center 30.
The high-voltage circuit breaker and disconnector assembly 10 is respectively arranged on each contact net dedicated line 41 and each branch line 42 and is used for cutting off or connecting the contact net dedicated line 41 and the branch line 42 from the positive line 43 so as to cut off and reconnect a fault line. The overhead line 41 and the branch line 42 may be provided with one or more lines.
The on-site measurement and control device 20 is used for collecting the line current of the special line and branch line of the contact network in real time and cutting off or switching on the high-voltage circuit breaker and the isolating switch component of the corresponding line according to the line current; and the fault current and the fault message can be transmitted to a remote control center through network transmission, so that a dispatcher is reminded of the line fault, and a basis is provided for the next fault inspection and processing.
The remote control center 30 is used for receiving and displaying the line current information sent by the on-site measurement and control device and the switch positions of the high-voltage circuit breaker and the isolating switch assembly, and sending a switching-off or switching-on control signal to the high-voltage circuit breaker and the isolating switch assembly.
As shown in fig. 2, the on-site measurement and control device 20 includes a chassis, a microcomputer measurement and control device 22 disposed in the chassis, and an ac/dc power supply system 24 for supplying power to the microcomputer measurement and control device 22, the railway communication base station 23, and the high-voltage circuit breaker and disconnector assembly 10.
The microcomputer measurement and control device 22 is used for collecting the line current of the special line and branch line of the contact network in real time, and sending a cut-off or switch-on control signal to the high-voltage circuit breaker and the isolating switch component 10 according to the detected line current. In addition, the acquired data is sent to the remote control center 30 through the railway communication base station 23, and meanwhile, the instruction issued by the remote control center 30 is received, and corresponding operation is executed.
The ac/dc power supply system 24 includes a rectifying and charging module 241, a monitoring module 242, a battery 243, and an inverter 244.
After the alternating current power supply is controlled by the air switch, the alternating current power supply enters the rectification charging module 241 and is output after rectification treatment:
the three 110V DC control buses provide control power for the microcomputer measurement and control device 22, the high-voltage circuit breaker and the control loop of the isolating switch assembly 10.
And the two paths of closing buses provide a switching-on and switching-off power supply for the high-voltage circuit breaker and the isolating switch assembly 10.
And one path of direct current charging power supply is used for charging the storage battery.
The battery 243 serves as a backup dc power supply for the field control device 20. Under the condition that the alternating current power supply normally works, the storage battery 243 carries out uniform floating charging after alternating current is rectified by the rectifying and charging module 241, and under the condition that two paths of alternating current power supplies are completely power-off, the storage battery 243 discharges to provide power supplies required by work for the microcomputer measurement and control device 22, the high-voltage circuit breaker and the isolating switch assembly 10, so that the normal work of the system is ensured.
In addition, when the line is in power failure, the inverter 244 inverts the 110V dc power output by the storage battery 243 into an ac 220V power to provide an ac power for the railway communication base station 23, so that the railway communication base station 23 can continue to work normally to establish the connection between the field control device 20 and the remote control center 30 under the condition of ac power loss.
The rectifying and charging modules 241 are configured to be two, any one of the rectifying and charging modules is damaged, and the other rectifying and charging module can ensure that the monitoring module 242 can work normally.
The monitoring module 242 is configured to detect the operating state of the ac/dc power supply system 24 in real time, display the input and output voltages and currents, monitor the on/off state and the fault of the rectifying and charging module 241, and control the operating state of the rectifying and charging module 241 according to the detection parameters.
As shown in fig. 3, the chassis is provided with an ac plug-in 211, a CPU plug-in 212, a signal plug-in 213 and a man-machine conversation plug-in 214.
The ac plug 211 is used to convert secondary side current and voltage signals of TA (current transformer) and TV (voltage transformer) into weak current signals.
The CPU card 212 integrates a power supply module, which converts ac and dc power supplied from the outside into a voltage required for system operation. The module inputs alternating current and direct current of 220V or 110V (corresponding specifications are selected according to requirements), outputs direct current of 5V and 24V, and is respectively used for digital devices or driving relays and the like to work.
The signal insert 213 includes a signal line terminal, a trip and close terminal, and a standby lamp terminal.
The man-machine conversation plug-in 214 is used for keyboard operation, liquid crystal display, signal lamp indication and USB port debugging.
Each plug-in components are in modular design, can be independently replaced and are convenient to maintain.
The microcomputer measurement and control device 22 is provided with a low voltage locking module, a PT disconnection locking module, a reclosing acceleration function module and a control loop disconnection monitoring module.
And the PT disconnection locking module sends out an alarm signal when detecting PT disconnection.
And the post-reclosing acceleration function module is used for controlling the high-voltage circuit breaker and the isolating switch assembly to trip in an acceleration mode when the current is larger than a preset value after reclosing.
And the low-frequency load shedding functional module is used for realizing low-voltage locking, current locking and slip locking. And when the frequency exceeds the normal range (45 Hz-55 Hz) of the frequency when the device is put into operation, the low-frequency load shedding function is locked. The low voltage indicates that a fault state is possible, and the protection is required to complete tripping, so that the low-frequency load shedding function is locked; if the current is too small, the frequency reduction may not be caused by the line, and even if the frequency reduction is eliminated, the low-frequency load reduction function is locked, and the locking is performed by the small three-phase measuring current. When the line is started with a heavy load such as a motor, the system frequency is rapidly reduced, so that the slip lock is used.
The control loop disconnection monitoring function module adopts the combined contact of the closing relay and the tripping relay to judge whether the control loop is normal or not, and sends out a control loop disconnection warning signal after 0.5 second delay when a fault occurs.
The present invention is not limited to the above-mentioned best mode, and any person should learn the structural change made under the teaching of the present invention, all with the present invention has the same or similar technical solution, all fall into the protection scope of the present invention.

Claims (7)

1. The utility model provides an electrified railway contact net district section trouble intelligence excision system, includes high-voltage circuit breaker and isolator subassembly, on-the-spot measurement and control device and remote control center, high-voltage circuit breaker and isolator subassembly arrange on each contact net branch line for with contact net private line, branch line from the positive line cut off or put through, its characterized in that, on-the-spot measurement and control device includes: including quick-witted case and set up in quick-witted incasement:
the microcomputer measurement and control device is used for collecting the line current of a special line and a branch line of the contact network in real time and sending a cut-off or switch-on control signal to the high-voltage circuit breaker and the isolating switch component according to the line current;
the alternating current-direct current power supply system comprises a rectifying and charging module, a monitoring module, a storage battery and an inverter, wherein an input alternating current power supply is rectified by the rectifying and charging module to output three 110V direct current control buses, and a control power supply is provided for the microcomputer measurement and control device, the high-voltage circuit breaker and a control loop of the isolating switch assembly; outputting two paths of closing buses to provide a switching power supply for the high-voltage circuit breaker and the isolating switch assembly; outputting a path of storage battery charging power supply for charging the storage battery; the inverter is used for inverting the 110V direct current power supply output by the storage battery into an alternating current 220V power supply and providing an alternating current power supply for the railway communication base station; the monitoring module is used for monitoring the working state of the alternating current and direct current power supply system in real time;
and the remote control center is used for receiving and displaying the line current information sent by the microcomputer measurement and control device, the switch positions of the high-voltage circuit breaker and the isolating switch assembly and sending a switching-off or switching-on control signal to the high-voltage circuit breaker and the isolating switch assembly.
2. The intelligent electrified railway catenary section fault clearing system of claim 1, wherein the rectifying and charging modules are configured as two in a parallel arrangement.
3. The intelligent removing system for the faults of the electrified railway contact network section according to claim 1, wherein the chassis is provided with:
the alternating current plug-in is used for converting secondary side current and voltage signals of the TA and the TV into weak current signals;
the CPU plug-in integrates a power supply module and outputs 5V and 24V to input alternating current and direct current of 220V or 110V;
the signal plug-in comprises a signal line terminal, a tripping and closing terminal and a standby lamp terminal;
and the man-machine conversation plug-in is used for keyboard operation, liquid crystal display, signal lamp indication and USB port debugging.
4. The system for intelligently removing the faults of the electrified railway contact network section is characterized in that the microcomputer measurement and control device is provided with a low-frequency load shedding function module which is used for locking the low-frequency load shedding function when the frequency exceeds the normal range of 45 Hz-55 Hz during working.
5. The system for intelligently removing the faults of the electrified railway contact network sections according to claim 1, wherein the microcomputer measurement and control device is provided with a PT (potential transformer) disconnection locking module and is used for sending out an alarm signal when the PT disconnection is detected.
6. The system of claim 1, wherein the microcomputer measurement and control device is provided with a post-reclosing acceleration function module, and is configured to control the high-voltage circuit breaker and the disconnecting switch assembly to trip in an accelerated manner when current is greater than a preset value after reclosing.
7. The system for intelligently removing the faults of the electrified railway contact network sections according to claim 1, wherein the microcomputer measurement and control device is provided with a control loop disconnection monitoring module and is used for sending a control loop disconnection warning signal when the control loop faults are detected.
CN202022805634.8U 2020-11-26 2020-11-26 Intelligent removing system for faults of electrified railway contact network section Active CN213521411U (en)

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Application Number Priority Date Filing Date Title
CN202022805634.8U CN213521411U (en) 2020-11-26 2020-11-26 Intelligent removing system for faults of electrified railway contact network section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022805634.8U CN213521411U (en) 2020-11-26 2020-11-26 Intelligent removing system for faults of electrified railway contact network section

Publications (1)

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CN213521411U true CN213521411U (en) 2021-06-22

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