CN206452103U - A kind of frame protection device for metro traction power system - Google Patents
A kind of frame protection device for metro traction power system Download PDFInfo
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- CN206452103U CN206452103U CN201720145533.8U CN201720145533U CN206452103U CN 206452103 U CN206452103 U CN 206452103U CN 201720145533 U CN201720145533 U CN 201720145533U CN 206452103 U CN206452103 U CN 206452103U
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Abstract
The utility model discloses a kind of frame protection device for metro traction power system; including the rectifier cabinet body frame with ground insulating mounting, online disconnecting switch cabinet frame work, dc switch cabinet frame work and negative pole cabinet; No. 2 ground connection busbars, cathode bus bars of No. 1 ground connection busbar provided with connection rectifier cabinet body frame, connection online disconnecting switch cabinet frame work and dc switch cabinet frame work in negative pole cabinet; also include two sets of framework current dividers and current transducer; a set of voltage transmitter; PLC for protecting control, for monitoring the monitor screen with protection setting.The utility model, which is based on relay-type frame protection scheme, will protect detection separation; make direct-current switch cabinet and the online a set of current protection of isolating switch cabinet; make rectifier cubicle and a set of current protection of negative pole cabinet; overall and shared a set of voltage protection; connection can be pointedly cut off when a failure occurs; and can fault location exactly, effectively reduce maintenance investigation difficulty, improve maintenance efficiency.
Description
Technical field
The utility model is related to a kind of frame protection device for metro traction power system.
Background technology
With social development, subway already turns into the preferred vehicles that people go on a journey.It is mainly use in subway circulation
DC traction power-supply system, its safe and reliable operation is the emphasis of metro operation concern.
Subway DC Traction is isolated neutral system, is flowed back using rail, and rail uses insulating mounting.In order to
Protect passenger safety, each station setting side rail wear.In order to prevent corrosion of the stray electrical current to DC equipment, lead
Draw electric substation's DC equipment and use insulating mounting, for such case, DC equipment is provided with frame leakage protection device, use
In when positive pole to rack enclosure occur insulation infringement when cut off failure in time.Rectifier, negative pole in existing tractive power supply system
Cabinet, direct-current switch cabinet, online isolating switch cabinet set a set of frame leakage protection device jointly, mainly by current element and voltage
Element is constituted, and wherein current element is used for when positive pole discharges shell in any DC equipment, and earth current passes through current elements
Part flows into earth mat, then returns to rail by the potential limiting device between rail and ground（Negative pole）, adjusted when earth current is reached
During value, frame leakage protection current element is acted, this traction substation 35kV Rectification Power Factors feeder breaker and direct current inlet-outlet line
Circuit breaker trip, while the dc circuit breaker that the adjacent traction substation of shunt tripping is powered to identical power supply section；Voltage component is in inspection
When surveying voltage more than voltage component setting valve, this traction substation 35kV Rectification Power Factors feeder breaker and the open circuit of direct current inlet-outlet line
Device trips.
Find in actual applications, this setup also has problems, for example, when event occurs for any DC equipment
After barrier, whole DC equipments can be cut off, non-selectivity, coverage is larger, can serious shadow especially in subway circulation section
Ring the normal operation of subway；Its current element is directionless to be judged, poor selectivity, when frame insulation processing is not in place, there is mistake
Dynamic risk, endangers subway circulation；Produce protection act after, device can not failure judgement scope, must investigate one by one, influence failure
Processing time.
Utility model content
For above-mentioned the deficiencies in the prior art, the utility model provides a kind of framework for metro traction power system and protected
Protection unit.
To achieve these goals, the technical solution adopted in the utility model is as follows：
A kind of frame protection device for metro traction power system, including the rectifier cabinet frame with ground insulating mounting
In frame, online disconnecting switch cabinet frame work, dc switch cabinet frame work and negative pole cabinet, the negative pole cabinet provided with No. 1 ground connection busbar, No. 2
Busbar and cathode bus bar are grounded, wherein, No. 1 ground connection busbar is connected by cable with the rectifier cabinet body frame, and described 2
Number ground connection busbar is all connected with by cable with disconnecting switch cabinet frame work and the dc switch cabinet frame work of surfing the Net；The frame protection
Device also includes No. 1 framework current divider and No. 1 current transducer that are sequentially connected in series, No. 2 framework current dividers being sequentially connected in series and No. 2
Current transducer, and described No. 1 ground connection busbar and the voltage transmitter that is all connected with of cathode bus bar, with No. 1 current transducer, No. 2
The PLC that current transducer and voltage transmitter are all connected with, and the monitor screen being connected with PLC and instruction
Lamp, wherein, No. 1 is grounded busbar and No. 2 ground connection busbars by No. 1 framework current divider and No. 2 framework current dividers commonly through ground connection
Cable single-point grounding, No. 1 framework current divider is connected No. 1 and is grounded busbar, and current measurement signal passes through No. 1 ground connection busbar and 1 all the way
Number framework current divider is gathered to PLC through No. 1 current transducer again, and No. 2 framework current dividers are connected No. 2 ground connection busbars, separately
Current measurement signal is gathered to PLC controls through No. 2 current transducers again by No. 2 ground connection busbars and No. 2 framework current dividers all the way
Device, voltage measurement signal is gathered to PLC by No. 1 ground connection busbar and cathode bus bar through voltage speed changer, the monitoring
Screen and indicator lamp are arranged on negative pole cabinet panel.
Specifically, the rectifier cabinet body frame is two sets, is connected with No. 1 ground connection busbar.
Compared with prior art, the utility model has the advantages that：
（1）The utility model, which is based on current mode frame protection scheme, will protect detection separation, make direct-current switch cabinet and online
The a set of current protection of isolating switch cabinet, makes rectifier cubicle and a set of current protection of negative pole cabinet, overall and shared a set of voltage
Protection, can pointedly cut off connection when a failure occurs, and can relatively accurately fault location, effectively reduce dimension
Investigation difficulty is repaiied, maintenance efficiency is improved, and the utility model is skillfully constructed, it is simple in construction, it is easy to use, with extensive
Application prospect, is adapted to popularization and application.
（2）The utility model gathers the current-voltage information in framework loop using current transducer and voltage transmitter,
Information gathering is more accurate, and is integrally received by PLC system and judge these information, command adapted thereto is made, compared to conventional
The relay of use, can distinguish frame currents both forward and reverse directions, can avoid misoperation；And Current Voltage transmitter can also
Sense of current during failure is recorded, reliable data are provided and supported to solve failure and hidden danger.
（3）The utility model can also set corresponding threshold value using PLC system, when transmitter gathers the information provided
During more than thresholding, system sends alarm, reminds staff's concern and the hidden danger of investigation operation in advance, plays the effect prevented trouble before it happens
Really.
（4）The utility model adds supervision equipment, can display frame voltage, electric current in real time, logout inquiry passes through
Monitor screen carries out the setting of Protection parameters.
（5）The utility model gathers frame voltage, electric current using PLC by current divider and measuring transducer, can
Relay protective scheme computing is carried out, protection exit can be achieved the adjacent choosing that is delayed is jumped, in direct current frame currents protection act, first tripping
This institute switchs, and judges whether also there is fault current, if any by delay shunt tripping neighboring station switch, is not jumped if failure has been cut off
Neighbour is switched, so as to reduce accident impact scope, fault location, effectively reduces maintenance investigation difficulty exactly.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples, and embodiment of the present utility model includes
But it is not limited to the following example.
Embodiment
As shown in figure 1, this is used for the frame protection device of metro traction power system, including two sets with ground insulating mounting
Rectifier cabinet body frame 12, online disconnecting switch cabinet frame work 13, dc switch cabinet frame work 14 and negative pole cabinet 15, are arranged at negative pole cabinet
Interior No. 1 ground connection busbar 1, No. 2 ground connection busbars 2 and cathode bus bar 3, and No. 1 framework current divider 4, No. 1 current transducer 5,2
Number framework current divider 6, No. 2 current transducers 7, voltage transmitter 8, PLC 9, monitor screen 10 and indicator lamp 11.Wherein,
Two sets of rectifier cabinet body frames are by cable connection to No. 1 ground connection busbar, and No. 1 ground connection busbar is connected after No. 1 framework current divider
Ground connection, No. 1 framework current divider connects No. 1 current transducer, so constitutes current mode frame protection all the way；Online isolating switch cabinet
Framework and dc switch cabinet frame work are by cable connection to No. 2 ground connection busbars, and No. 2 ground connection busbars connect No. 2 framework current dividers
After be grounded, No. 2 framework current dividers connect No. 2 current transducers, so constitute another road current mode frame protection；Voltage transmitter
No. 1 ground connection busbar of connection or No. 2 ground connection busbars, and cathode bus bar is connected, constitute overall frame voltage protection；No. 1 electric current becomes
Device, No. 2 current transducers and voltage transmitter is sent to be all connected to PLC, the current-voltage information transmission collected
Its processing, PLC connection monitoring screen and indicator lamp are given, providing information for staff indicates.
When framework leakage failure occurs for rectifier cabinet body frame, shunt tripping Rectification Power Factor exchange medium voltage breaker and direct current
Lead-in circuit breaker, this traction substation Rectification Power Factor is out of service, the not adjacent institute of shunt tripping, by failure dc bus it is instantaneous
Big two-side feeding is realized, and contact net does not have a power failure, and does not influence train normally to run.Framework leakage event occurs for dc switch cabinet frame work
Barrier, is still to this institute of shunt tripping Rectification Power Factor exchange medium voltage breaker, direct current lead-in circuit breaker, DC feeder breaker, and closed bite
Faulty electric current is still detected after lock, this institute switch trip, by the adjacent corresponding DC feeder breaker of delay judgement shunt tripping,
Failure is caused to be driven two interval power failures of side, if failure removal after this institute switch trip, shunt tripping is not adjacent is switched,
Two intervals that failure is driven side do not have a power failure.By above-mentioned setting, framework failure can be efficiently reduced to metro operation
Influence, while improving the simplicity and accuracy of O＆M.
On the other hand, because the utility model uses PLC, it is pre- to carry out to set corresponding threshold value
Alert, the framework loop information collected by Current Voltage transmitter passes through monitor screen display frame real-time voltage, electric current and pre-
Alert information, the failure for pointing out staff to occur plays the effect prevented trouble before it happens.
Above-described embodiment is only preferred embodiment of the present utility model, not to the limitation of the utility model protection domain,
In every case design principle of the present utility model, and the change for carrying out non-creativeness work on this basis and making are used, all should
Belong within protection domain of the present utility model.
Claims (2)
1. a kind of frame protection device for metro traction power system, including the rectifier cabinet frame with ground insulating mounting
Frame, online disconnecting switch cabinet frame work, dc switch cabinet frame work and negative pole cabinet, it is characterised in that connect in the negative pole cabinet provided with No. 1
Ground busbar, No. 2 ground connection busbars and cathode bus bar, wherein, No. 1 ground connection busbar passes through cable and the rectifier cabinet body frame
Connection, No. 2 ground connection busbars are all connected with by cable with the online disconnecting switch cabinet frame work and dc switch cabinet frame work；Institute
State No. 1 framework current divider and No. 1 current transducer that frame protection device also includes being sequentially connected in series, No. 2 frameworks being sequentially connected in series
Current divider and No. 2 current transducers, the voltage transmitter being all connected with described No. 1 ground connection busbar and cathode bus bar, with No. 1 electric current
The PLC that transmitter, No. 2 current transducers and voltage transmitter are all connected with, and the monitoring being connected with PLC
Screen and indicator lamp, wherein, No. 1 ground connection busbar and No. 2 ground connection busbars are common by No. 1 framework current divider and No. 2 framework current dividers
By earth cable single-point grounding, No. 1 framework current divider is connected No. 1 and is grounded busbar, and current measurement signal passes through No. 1 ground connection all the way
Busbar and No. 1 framework current divider are gathered to PLC through No. 1 current transducer again, and No. 2 framework current dividers are connected No. 2 and are grounded
Busbar, another road current measurement signal by No. 2 ground connection busbars and No. 2 framework current dividers again through No. 2 current transducers gather to
PLC, voltage measurement signal is gathered to PLC, institute by No. 1 ground connection busbar and cathode bus bar through voltage speed changer
State monitor screen and indicator lamp is arranged on negative pole cabinet panel.
2. the frame protection device according to claim 1 for metro traction power system, it is characterised in that described whole
It is two sets to flow device cabinet body frame, is connected with No. 1 ground connection busbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720145533.8U CN206452103U (en) | 2017-02-17 | 2017-02-17 | A kind of frame protection device for metro traction power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720145533.8U CN206452103U (en) | 2017-02-17 | 2017-02-17 | A kind of frame protection device for metro traction power system |
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| CN206452103U true CN206452103U (en) | 2017-08-29 |
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| CN201720145533.8U Active CN206452103U (en) | 2017-02-17 | 2017-02-17 | A kind of frame protection device for metro traction power system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019084947A1 (en) * | 2017-11-06 | 2019-05-09 | 华东泓泽机电设备（昆山）有限公司 | Direct-current switch cabinet, and monitoring system thereof and monitoring method therefor |
| CN111736096A (en) * | 2020-07-27 | 2020-10-02 | 镇江大全赛雪龙牵引电气有限公司 | Direct current switch cabinet frame insulation monitoring and positioning system |
| CN112924816A (en) * | 2021-02-02 | 2021-06-08 | 广州市扬新技术研究有限责任公司 | Direct current power flow on-line monitoring station measuring scheme of power supply network |
-
2017
- 2017-02-17 CN CN201720145533.8U patent/CN206452103U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019084947A1 (en) * | 2017-11-06 | 2019-05-09 | 华东泓泽机电设备（昆山）有限公司 | Direct-current switch cabinet, and monitoring system thereof and monitoring method therefor |
| CN111736096A (en) * | 2020-07-27 | 2020-10-02 | 镇江大全赛雪龙牵引电气有限公司 | Direct current switch cabinet frame insulation monitoring and positioning system |
| CN111736096B (en) * | 2020-07-27 | 2023-02-10 | 镇江大全赛雪龙牵引电气有限公司 | Direct current switch cabinet frame insulation monitoring and positioning system |
| CN112924816A (en) * | 2021-02-02 | 2021-06-08 | 广州市扬新技术研究有限责任公司 | Direct current power flow on-line monitoring station measuring scheme of power supply network |
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