CN208548710U - A kind of ZLB current-limiting apparatus based on electric current judgement - Google Patents
A kind of ZLB current-limiting apparatus based on electric current judgement Download PDFInfo
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- CN208548710U CN208548710U CN201820476330.1U CN201820476330U CN208548710U CN 208548710 U CN208548710 U CN 208548710U CN 201820476330 U CN201820476330 U CN 201820476330U CN 208548710 U CN208548710 U CN 208548710U
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Abstract
The utility model discloses a kind of ZLB current-limiting apparatus based on electric current judgement, including inverter, current-limiting reactor, execute-in-place cabinet and Central Control Room, in which: inverter is in parallel with current-limiting reactor；Inverter is serially connected in power supply line；Inverter is connect with execute-in-place cabinet；Execute-in-place cabinet is connect with Central Control Room；Inverter includes phase control device, breaker, Roc CT coil and returns to CT coil；Breaker, Roc CT coil and return CT coil are connected in power supply line；Breaker, Roc CT coil and return CT coil are connect with controller respectively；Current-limiting reactor and breaker and Roc CT coils from parallel connection of coils；Phase control device is connect with operation cabinet.The utility model has the following beneficial effects: zero load, high reliablity, stable, fast response time.
Description
Technical field:
The utility model relates to power domains, and in particular to a kind of ZLB current-limiting apparatus based on electric current judgement.
Background technique:
It is well known that short circuit current was generally fault current more than ten accompanies when short trouble occurs for electric system, transformation is given
Device, breaker, transmission line of electricity cause very big harm, and relatively inexpensive at present economical and practical vacuum circuit breaker cut-offs energy
Power is in 40KA hereinafter, cut-off 40 to 60 milliseconds of needs, with developing for all types of electricity consumption enterprises, the big feel of power load
Soaring, main transformer capacity also increases accordingly, and each utility power grid systems face short circuit current breaks close to the practical limit of maximum of breaker
The resistance to shorting rush of current of road device beginning off-capacity, transformer is insufficient, seriously threatens the safe operation of power grid, so most become
Power station has been connected, and string is anti-also known as ZLB current limiter, current most producer ZLB current limiters monitor practical electricity by Rogowski coil
Stream, after electric current is greater than certain value, high-speed switch separating brake, after being judged as fault current, limiting short-circuit current, failure is eliminated in 2S
Afterwards, high-speed switch is closed, high-speed switch is constantly in open position, then jumps main transformer low-pressure side breaker, at this point, when high-speed switch
When position is unreliable, then there is the risk for accidentally dividing breaker.Improved control strategy by electric current criterion come division breaker,
It can prevent the generation of such accident.
Summary of the invention:
The purpose of this utility model is to provide a kind of zero load, high reliablity, stable, one kind of fast response time
ZLB current-limiting apparatus based on electric current judgement.
The utility model is achieved through the following technical solutions:
A kind of ZLB current-limiting apparatus based on electric current judgement of the utility model, including inverter, current-limiting reactor, scene
Operation cabinet and Central Control Room, in which: inverter is in parallel with current-limiting reactor；Inverter is serially connected in power supply line；Inverter and existing
Field operation cabinet connection；Execute-in-place cabinet is connect with Central Control Room；Inverter includes phase control device, breaker, Roc CT coil and returns
Return CT coil；Breaker, Roc CT coil and return CT coil are connected in power supply line；It breaker, Roc CT coil and returns
CT coil is returned to connect with controller respectively；Current-limiting reactor and breaker and Roc CT coils from parallel connection of coils；Phase control device and operation cabinet
Connection.
Above-mentioned a kind of ZLB current-limiting apparatus based on electric current judgement, in which: operation cabinet includes window machine controller, optical fiber end
Son and terminal block；Central Control Room includes control room backstage, oscillograph and display device；Optic fibre connector connects with phase control device optical fiber
It connects；Terminal block is electrically connected with phase control device；Central Control Room is electrically connected with terminal block；Control room backstage, oscillograph and terminal block connect；
Display device is electrically connected with oscillograph.
Above-mentioned a kind of ZLB current-limiting apparatus based on electric current judgement, in which: breaker is that " vortex driving " quicks break
Device.
The utility model has the beneficial effects that: zero load, high reliablity, stable, fast response time is improved
Control strategy by electric current criterion come division main transformer low-pressure side breaker, while joined fault self-recovery success action logic sentence
According to, be able to satisfy under all kinds of fault conditions, stand in zero load loss, ensure that the reliability of power supply.
Detailed description of the invention:
Fig. 1: the principles of the present invention figure；
Fig. 2: the control strategy of the utility model judges figure；
In figure: 1- inverter, 101- phase control device, 102- breaker, 103- Roc CT coil, 104- return CT coil,
2- current-limiting reactor, 3- execute-in-place cabinet, 301- window machine controller, 302- optic fibre connector, 303- terminal block, 4- Central Control Room,
401- control room backstage, 402- oscillograph, 403- display device.
Specific embodiment:
The utility model is described further with reference to the accompanying drawings and detailed description:
Embodiment: as shown in Figure 1 and Figure 2, a kind of ZLB current-limiting apparatus based on electric current judgement, including inverter 1, current limliting electricity
Anti- device 2, execute-in-place cabinet 3 and Central Control Room 4, in which: inverter 1 is in parallel with current-limiting reactor 2；Inverter 1 is serially connected in supply lines
Lu Zhong；Inverter 1 is connect with execute-in-place cabinet 3；Execute-in-place cabinet 3 is connect with Central Control Room 4；Inverter 1 includes phase control device
101, breaker 102, Roc CT coil 103 and return CT coil 104；Breaker 102, Roc CT coil 103 and return CT line
Circle 104 is connected in power supply line；Breaker 102, Roc CT coil 103 and return CT coil 104 respectively with phase control device 101
Connection；Current-limiting reactor 2 is in parallel with breaker 102 and Roc CT coil 103；Phase control device 101 is connect with execute-in-place cabinet 3；
Wherein: execute-in-place cabinet 3 includes window machine controller 301, optic fibre connector 302 and terminal block 303；Central Control Room 4 is including after control room
Platform 401, oscillograph 402 and display device 403；Optic fibre connector 302 is connect with phase control device 101 with optical fiber；Terminal block 303 and phase
Controller 101 is electrically connected；Central Control Room 4 is electrically connected with terminal block 303；Control room backstage 401, oscillograph 402 and terminal block 303 connect
It connects；Display device 403 is electrically connected with oscillograph 402；Wherein: breaker 102 is " vortex driving " fast breaker.
Wherein: it is judged and control by following control strategy step:
A. when Roc CT coil 103 detects that electric current is greater than 6.9KA, separating brake is switched；
B. it returns to CT coil 104 and detects that electric current is greater than 2.2KA and then carries out in next step；Detect that electric current is less than or equal to
When 2.2KA, closing operation is carried out, system restPoses；
C. continue 2S to close a floodgate once；
D. it returns to CT coil 104 and detects that electric current is greater than 1KA and then carries out in next step；When detecting that electric current is less than or equal to 1KA,
Closing operation is carried out, system restPoses；
E. it closes a floodgate unsuccessful, jumps main transformer outlet 1；
Or:
A. Roc CT coil 103 is not detected electric current and detects that electric current is greater than setting greater than 6.9KA, return CT coil 104
When value 100A；
B. it closes a floodgate primary；
C. it returns to CT coil 104 and detects that lasting 2s electric current is greater than 100A and then carries out in next step；It detects and continues
When 2s electric current is less than or equal to 100A, closing operation is carried out, system restPoses；
D. it closes a floodgate unsuccessful, jumps main transformer outlet 2.
Claims (3)
1. a kind of ZLB current-limiting apparatus based on electric current judgement, including inverter (1), current-limiting reactor (2), execute-in-place cabinet (3)
With Central Control Room (4), it is characterised in that: the inverter (1) is in parallel with current-limiting reactor (2)；The inverter (1) is serially connected in confession
In electric line；The inverter (1) connect with execute-in-place cabinet (3)；The execute-in-place cabinet (3) connect with Central Control Room (4)；Institute
Inverter (1) is stated to include phase control device (101), breaker (102), Roc CT coil (103) and return to CT coil (104)；Institute
It states breaker (102), Roc CT coil (103) and returns to CT coil (104) and be connected in power supply line；The breaker
(102), Roc CT coil (103) and return CT coil (104) are connect with phase control device (101) respectively；The current-limiting reactor
(2) in parallel with breaker (102) and Roc CT coil (103)；The phase control device (101) connect with execute-in-place cabinet (3).
2. a kind of ZLB current-limiting apparatus based on electric current judgement as described in claim 1, it is characterised in that: the execute-in-place
Cabinet (3) includes window machine controller (301), optic fibre connector (302) and terminal block (303)；After the Central Control Room (4) includes control room
Platform (401), oscillograph (402) and display device (403)；The optic fibre connector (302) is connected with phase control device (101) with optical fiber
It connects；The terminal block (303) is electrically connected with phase control device (101)；The Central Control Room (4) is electrically connected with terminal block (303)；It is described
Control room backstage (401), oscillograph (402) are connect with terminal block (303)；The display device (403) and oscillograph (402) electricity
Connection.
3. a kind of ZLB current-limiting apparatus based on electric current judgement as claimed in claim 1 or 2, it is characterised in that: the breaker
It (102) is " vortex driving " fast breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820476330.1U CN208548710U (en) | 2018-04-04 | 2018-04-04 | A kind of ZLB current-limiting apparatus based on electric current judgement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820476330.1U CN208548710U (en) | 2018-04-04 | 2018-04-04 | A kind of ZLB current-limiting apparatus based on electric current judgement |
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| CN208548710U true CN208548710U (en) | 2019-02-26 |
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| CN201820476330.1U Active CN208548710U (en) | 2018-04-04 | 2018-04-04 | A kind of ZLB current-limiting apparatus based on electric current judgement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448552A (en) * | 2018-04-04 | 2018-08-24 | 国网宁夏电力有限公司中卫供电公司 | A kind of ZLB current-limiting apparatus judged based on electric current |
-
2018
- 2018-04-04 CN CN201820476330.1U patent/CN208548710U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448552A (en) * | 2018-04-04 | 2018-08-24 | 国网宁夏电力有限公司中卫供电公司 | A kind of ZLB current-limiting apparatus judged based on electric current |
| CN108448552B (en) * | 2018-04-04 | 2024-03-08 | 国网宁夏电力有限公司中卫供电公司 | ZLB current limiting device based on current judgment |
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