CN205844451U - Electrolytic aluminium factory 10kV cable singlephase earth fault management system - Google Patents
Electrolytic aluminium factory 10kV cable singlephase earth fault management system Download PDFInfo
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- CN205844451U CN205844451U CN201620642667.6U CN201620642667U CN205844451U CN 205844451 U CN205844451 U CN 205844451U CN 201620642667 U CN201620642667 U CN 201620642667U CN 205844451 U CN205844451 U CN 205844451U
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Abstract
The utility model discloses a kind of electrolytic aluminium factory 10kV cable singlephase earth fault management system, including: voltage measurement module, signal acquisition module, extinguishing arc module, pulse signal generation module, above-mentioned each module is all connected with controller.In the course of the work, voltage measurement module is if it find that short circuit, signal is sent to controller, controller control wave generation module sends sine-shaped current signal in loop, then signal acquisition module, detected by branch road zero sequence current mutual inductor, controller judges that loop concrete is short-circuited, and control extinguishing arc module, control this loop by catalyst to close a floodgate, loop Iterim Change is become the neutral-point solid ground method of operation, after 2s, catalyst disconnects, then the signal that controller returns according to voltage measurement module, whether failure judgement exists.Which achieves in judging a loop fault, each loop will not be interfered, and accuracy is strong, and can also tackle the situation of singlephase earth fault flexibly.
Description
Technical field
This utility model relates to electrolytic aluminium factory power technology apparatus field, particularly relates to a kind of electrolytic aluminium factory 10kV cable
Singlephase earth fault management system.
Background technology
In different industrial circles, electrical equipment has the biggest difference to the requirement of power supply reliability.In electrolytic aluminium factory, one-level
More than the 95% of load Zhan Quan factory load, requires the highest to power supply reliability, and power failure will cause producing stopping production, protection device
Malfunctioning, even cause cooling device to stop transport, the critical person and the situation of equipment safety.
Specifying the system that 3-10kV cable run is constituted in DL/T 620, capacitance current is to use neutral point not less than 30A
Earthed system.Consider that electrolytic aluminium factory load is higher to ground connection reliability requirement, simultaneously, it is considered to isolated neutral system allows band
The requirement of failure operation 1～2h, the most quickly, accurately selects fault loop, and it is aobvious at aluminum electrolysis industry to carry out localization of fault
Obtain particularly important.
Current domestic electrolytic aluminium factory does not has effective earth fault to manage system, it is common practice that in 10kV center distribution substation
The independent small current line selection of two sets and arc extinction cabinet are set, in 10kV point of distribution substation, set small current line selection system and PT cabinet.
Wherein, conventional line selection device for low current, according to utilizing the stable state or transient state component refined, route selection technology is divided into surely
State transient state and transient state route selection two class.Zero sequence admittance increment, zero sequence remnant current increment, zero sequence first-harmonic sequential it is divided into again to reflect from principle
Not, watt current, watt current and phase sequence cooperation, transient current, harmonic current, than amplitude ratio phase, negative-sequence current and Principle of Wavelet
Deng kind more than ten.
Owing to the signal of route selection is weak, be easily disturbed, although said method theoretical foundation set up, but in commercial Application by
In the existence of each side interference such as harmonic wave, ZCT saturated characteristic, intermittent arc grounding, route selection accuracy rate is poor.Separately
Separate with small current line selection due to arc extinction cabinet outward, it is impossible to tackle contingent singlephase earth fault flexibly.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of electrolytic aluminium factory 10kV cable singlephase earth fault and manages system
System, will not be interfered, and accuracy is strong, and can also tackle singlephase earth fault flexibly.
For solving above-mentioned technical problem, this utility model provides a kind of electrolytic aluminium factory 10kV cable singlephase earth fault management
System, including:
Voltage measurement module, whether described voltage measurement module is short-circuited in moment measure loop；
Signal acquisition module, described signal acquisition module can be examined by branch road zero sequence current mutual inductor short-circuit signal
Survey, and signal is collected and feeds back；
Extinguishing arc module, described extinguishing arc module by catalyst control loop deciliter；
Pulse signal generation module, described pulse signal generation module is for sending sinusoidal wave current letter in loop
Number；
Controller, above-mentioned each module is all connected with described controller.
Preferably, described signal acquisition module includes that multiple signal picker, every single described signal picker have one
The most specific individual address.
Preferably, the particular number of described branch road zero sequence current mutual inductor is equal with the quantity of described signal picker, and
The corresponding single described signal picker of every single described branch road zero sequence current mutual inductor.
Preferably, also include that man machine interface, described man machine interface are connected with described controller.
Preferably, also including that full factory controls background processor, described full factory controls background processor with described controller even
Connect.
Preferably, above each parts are all connected by communication bus.
Electrolytic aluminium factory 10kV cable singlephase earth fault provided by the utility model management system, including voltage measurement mould
Block, signal acquisition module, extinguishing arc module, pulse signal generation module and controller, and each module is all connected with controller.?
In work process, loop can be checked in the moment by voltage measurement module, if it find that short-circuit, send letter to controller at once
Number, controller control wave generation module sends sine-shaped current signal, then signal acquisition module in loop, passes through
Branch road zero sequence current mutual inductor on each branch road carries out detecting on corresponding branch road, by the signal collected and feedback
Result, controller judges that loop concrete is short-circuited, and controls extinguishing arc module, controls returning of this short circuit by catalyst
Closing a floodgate in road, from isolated neutral, loop is run Iterim Change and becomes the neutral-point solid ground method of operation, contact after 2s
Device disconnects, and the signal that then controller returns according to voltage measurement module, it is judged that whether fault exists, if not existing, it is judged that for
Provisional earth fault, loop sustainable operation, if fault still exists, slack-off for permanent earth, controller stops immediately
Minor loop works on.Which achieves in judging a loop fault, each loop will not be interfered, and accuracy is strong, and
The situation of singlephase earth fault can also be tackled flexibly.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment, the accompanying drawing used required in embodiment will be done letter below
Single introduction, it should be apparent that, the accompanying drawing in describing below is only embodiments more of the present utility model, general for this area
From the point of view of logical technical staff, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is electrolytic aluminium factory 10kV cable singlephase earth fault provided by the utility model management system structure signal
Figure.
In accompanying drawing, 1 is controller, and 21 is signal picker, and 22 is branch road zero sequence current mutual inductor, and 3 is voltage measurement mould
Block, 4 is extinguishing arc module, and 5 is pulse signal generation module, and 6 is communication bus, and 7 is man machine interface, and 8 is that full factory controls at backstage
Reason device.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than all real
Execute example.Based on the embodiment in this utility model, those of ordinary skill in the art under not making creative work premise, institute
The every other embodiment obtained, broadly falls into this utility model protection domain.
In order to make those skilled in the art be more fully understood that this utility model scheme, below in conjunction with the accompanying drawings and be embodied as
The utility model is described in further detail for mode.
Refer to Fig. 1, Fig. 1 is that electrolytic aluminium factory 10kV cable singlephase earth fault provided by the utility model manages system
Structural representation.
System is managed at a kind of electrolytic aluminium factory 10kV cable singlephase earth fault provided by the utility model, including:
Voltage measurement module 3, whether described voltage measurement module 3 is short-circuited in moment measure loop；
Signal acquisition module, described signal acquisition module can be examined by branch road zero sequence current mutual inductor 22 short-circuit signal
Survey, and signal is collected and feeds back；
Extinguishing arc module 4, described extinguishing arc module 4 by catalyst control loop deciliter；
Pulse signal generation module 5, described pulse signal generation module 5 is for sending sinusoidal wave current letter in loop
Number；
Controller 1, above-mentioned each module is all connected with described controller 1.
Wherein, after controller 1 triggers controlled silicon conducting, pulse generator just can carry out electric current route selection, and utilizes controlled
The combined floodgate of silicon and closedown realize the instantaneous conversion of small current neutral grounding and big current earthing, produce an adjustable and stronger pulse
Current signal, this just overcomes the problem that small current line selection signal intensity is weak or feature not clear and produces misoperation.
Electrolytic aluminium factory 10kV cable singlephase earth fault provided by the utility model management system, including voltage measurement mould
Block 3, signal acquisition module, extinguishing arc module 4, pulse signal generation module 5 and controller 1, and each module is all with controller 1 even
Connect.In the course of the work, loop can be checked in the moment by voltage measurement module 3, if it find that short-circuit, at once to controller 1
Sending signal, controller 1 control wave generation module 5 sends sine-shaped current signal, then signals collecting in loop
Module, carries out detecting on corresponding branch road by the branch road zero sequence current mutual inductor 22 on each branch road, by collecting
Signal and the result of feedback, controller 1 judges that loop concrete is short-circuited, and controls extinguishing arc module 4, passes through catalyst
Closing a floodgate in the loop controlling this short circuit, from isolated neutral, loop is run Iterim Change and becomes neutral-point solid ground to run
Mode, after 2s, catalyst disconnects, the signal that then controller 1 returns according to voltage measurement module 3, it is judged that whether fault exists,
If not existing, it is judged that for provisional earth fault, loop sustainable operation, if fault still exists, slack-off for permanent earth,
Controller 1 stops minor loop immediately and works on.Which achieves in judging a loop fault, each loop will not be by dry
Disturbing, accuracy is strong, and can also tackle the situation of singlephase earth fault flexibly.
In order to optimize above-described embodiment further, described signal acquisition module includes multiple signal picker 21, the most single
Described signal picker 21 has an address the most specific.By arranging multiple signal picker 21, may be implemented in each
Individually in loop, it is achieved a corresponding signal picker 21 is carried out this single loop works, and also individually to each
Signal picker 21 carries out a specific address, so can ensure that controller 1 can be that loop is transmitted accurately to understanding
The signal come over, improves the accuracy of detection.
Further, the quantity phase of the particular number of described branch road zero sequence current mutual inductor 22 and described signal picker 21
Deng, and the corresponding single described signal picker 21 of every single described branch road zero sequence current mutual inductor 22.In order to the most smart
The accurate position to short-circuit loop is determined and avoids the interference in other loop, the most every single described branch road zero sequence electricity
The corresponding single described signal picker 21 of current transformer 22.In the course of the work, first signal picker 21 is to loop, place
Moment is detected and monitors, and after finding that loop, place is short-circuited, is directly occurred by signal to controller 1, by controller 1
Control arteries and veins generator calabash and produce the rhythmic short circuit current of tool.Branch road zero sequence current mutual inductor 22 is simultaneously to current signal simultaneously
Check, and result is transferred to controller 1, thus judge fault loop, this completes a route selection.
In this utility model one specific embodiment, also include man machine interface 7, described man machine interface 7 and described controller 1
Connect.It will be appreciated by persons skilled in the art that by man machine interface 7 staff can check which loop concrete intuitively
Break down and break down handled result.
Further, also including that full factory controls background processor 8, described full factory controls background processor 8 and described control
Device 1 connects.Total length controls background processor and is used for controlling the overall operation situation of full factory, plays and each signal carries out a collection
With the effect processed, staff can carry out the analysis to signal in total length controls background processor or control total length
System.
In various embodiments above, each parts are all connected by communication bus 6.The logical biography selecting bus to be mainly used in signal
Defeated, it is possible to effective by the signal of each parts, it is transferred to controller 1, man machine interface 7 and full factory and controls background processor 8.
Electrolytic aluminium factory 10kV cable singlephase earth fault provided by the utility model management system, including voltage measurement mould
Block 3, signal acquisition module, extinguishing arc module 4, pulse signal generation module 5 and controller 1, and each module is all with controller 1 even
Connect.In the course of the work, loop can be checked in the moment by voltage measurement module 3, if it find that short-circuit, at once to controller 1
Sending signal, controller 1 control wave generation module 5 sends sine-shaped current signal, then signals collecting in loop
Module, carries out detecting on corresponding branch road by the branch road zero sequence current mutual inductor 22 on each branch road, by collecting
Signal and the result of feedback, controller 1 judges that loop concrete is short-circuited, and controls extinguishing arc module 4, passes through catalyst
Closing a floodgate in the loop controlling this short circuit, from isolated neutral, loop is run Iterim Change and becomes neutral-point solid ground to run
Mode, after 2s, catalyst disconnects, the signal that then controller 1 returns according to voltage measurement module 3, it is judged that whether fault exists,
If not existing, it is judged that for provisional earth fault, loop sustainable operation, if fault still exists, slack-off for permanent earth,
Controller 1 stops minor loop immediately and works on.Which achieves in judging a loop fault, each loop will not be by dry
Disturbing, accuracy is strong, and can also tackle the situation of singlephase earth fault flexibly.
Above electrolytic aluminium factory 10kV cable singlephase earth fault provided by the utility model management system is carried out in detail
Thin introduction.Principle of the present utility model and embodiment are set forth by specific case used herein, above example
Explanation be only intended to help to understand method of the present utility model and core concept thereof.It should be pointed out that, for the art
For those of ordinary skill, on the premise of without departing from this utility model principle, it is also possible to this utility model is carried out some changing
Entering and modify, these improve and modification also falls in this utility model scope of the claims.
Claims (6)
1. an electrolytic aluminium factory 10kV cable singlephase earth fault management system, it is characterised in that including:
Voltage measurement module (3), whether described voltage measurement module (3) is short-circuited in moment measure loop；
Signal acquisition module, described signal acquisition module can be examined by branch road zero sequence current mutual inductor (22) short-circuit signal
Survey, and signal is collected and feeds back；
Extinguishing arc module (4), described extinguishing arc module (4) by catalyst control loop deciliter；
Pulse signal generation module (5), described pulse signal generation module (5) is for sending sinusoidal wave current letter in loop
Number；
Controller (1), above-mentioned each module is all connected with described controller (1).
2. electrolytic aluminium factory 10kV cable singlephase earth fault management system as claimed in claim 1, it is characterised in that described letter
Number acquisition module includes that multiple signal picker (21), every single described signal picker (21) have one the most specifically
Location.
3. electrolytic aluminium factory 10kV cable singlephase earth fault management system as claimed in claim 2, it is characterised in that described
The particular number of road zero sequence current mutual inductor (22) is equal with the quantity of described signal picker (21), and every the most described
The corresponding single described signal picker (21) of road zero sequence current mutual inductor (22).
4. electrolytic aluminium factory 10kV cable singlephase earth fault management system as claimed in claim 3, it is characterised in that also include
Man machine interface (7), described man machine interface (7) is connected with described controller (1).
5. electrolytic aluminium factory 10kV cable singlephase earth fault management system as claimed in claim 4, it is characterised in that also include
Full factory controls background processor (8), and described full factory controls background processor (8) and is connected with described controller (1).
6. electrolytic aluminium factory 10kV cable singlephase earth fault management system as claimed in claim 5, it is characterised in that the most each
Parts are all connected by communication bus (6).
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| CN201620642667.6U CN205844451U (en) | 2016-06-23 | 2016-06-23 | Electrolytic aluminium factory 10kV cable singlephase earth fault management system |
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| CN201620642667.6U CN205844451U (en) | 2016-06-23 | 2016-06-23 | Electrolytic aluminium factory 10kV cable singlephase earth fault management system |
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| CN205844451U true CN205844451U (en) | 2016-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932683A (en) * | 2017-03-24 | 2017-07-07 | 山东香驰热动有限公司 | A kind of quick decision maker of 10KV electric power systems single-phase earthing |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932683A (en) * | 2017-03-24 | 2017-07-07 | 山东香驰热动有限公司 | A kind of quick decision maker of 10KV electric power systems single-phase earthing |
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| GR01 | Patent grant |