CN202737434U - 10kV ultrahigh speed short-circuit current interrupter - Google Patents
10kV ultrahigh speed short-circuit current interrupter Download PDFInfo
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- CN202737434U CN202737434U CN 201220387756 CN201220387756U CN202737434U CN 202737434 U CN202737434 U CN 202737434U CN 201220387756 CN201220387756 CN 201220387756 CN 201220387756 U CN201220387756 U CN 201220387756U CN 202737434 U CN202737434 U CN 202737434U
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Abstract
The utility model relates to a 10kV ultrahigh speed short-circuit current interrupter, comprising a quick current limiter and a high-voltage breaker which are connected in series with each other, wherein the quick current limiter and the high-voltage breaker are also connected in parallel with a reactor. According to the 10kV ultrahigh speed short-circuit current interrupter of the utility model, the quick current limiter and the high-voltage breaker are connected in parallel with the reactor for use after being connected in series with each other, during a normal operation of the 10kV ultrahigh speed short-circuit current interrupter, the reactor is shorted out by the quick current limiter and the high-voltage breaker, thereby reducing reactive loss of the reactor, when a fault occurs on a system, the quick current limiter can quickly break within a millisecond, the reactor is automatically put into operation, so as to limit a short-circuit current within 26kA, thereby ensuring that a generator outlet and a superior high-voltage feed-out cabinet (having a 31.5kA cut-off capacity) can reliably cut off the short-circuit fault and ensure equipment safety of the system; when the quick current limiter needs to be temporarily dropped out of use or put into use, an operator only needs to operate the breaker connected in series with the quick current limiter, so as to enable the quick current limiter to be off line or on line, thereby achieving the effects of simpleness and reliability.
Description
Technical field
The utility model relates to the flow restricter technical field, particularly relates to a kind of 10kV ultrahigh speed short circuit current cut-off device.
Background technology
Electric power system is broken down, in short circuit current can not be limited in the scope that high-tension apparatus can bear, and fast excision, can cause the primary cut-out blast, accident is further enlarged, even cause generating set to damage, infinitely prolong turnaround time, has a strong impact on the unit operation benefit.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of 10kV ultrahigh speed short circuit current cut-off device, limiting short-circuit current effectively when cogeneration 10kV system breaks down, and excision avoids damaging high-tension apparatus fast.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of 10kV ultrahigh speed short circuit current cut-off device is provided, the quick current-limiting device and the primary cut-out that comprise mutual series connection, described quick current-limiting device and primary cut-out are also in parallel with a reactor.
Described quick current-limiting device is large capacity fuse.
Described large capacity fuse adopts the coil type current sensor.
Described quick current-limiting device also is equipped with the electromagnetic-field-shielded cover of being made by high permeability material outward.
The controller of described primary cut-out adopts Dinuclear Systems.
Also be provided with electric blocking between described quick current-limiting device and the primary cut-out.
Beneficial effect
Owing to having adopted above-mentioned technical scheme, the utility model compared with prior art, have following advantage and good effect: use in parallel with reactor the utility model is connected the quick current-limiting device with primary cut-out after, during normal operation, reactor is by quick current-limiting device and primary cut-out short circuit, therefore reduced the reactive loss of reactor, when system breaks down, the quick current-limiting device disconnects rapidly in signa, reactor puts into operation automatically, in 26kA, (cutting off ability 31.5kA) can excise short trouble reliably thereby assurance generator outlet and higher level's high pressure feed out cabinet, guarantees system equipment safety with short-circuit current limitation; When temporary needs withdraws from or drops into the quick current-limiting device, only need the with it circuit breaker of series connection of operation, just can or reach the standard grade quick current-limiting device off-line, very simple, reliable.
Description of drawings
Fig. 1 is functional-block diagram of the present utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only are used for explanation the utility model and are not used in the scope of the present utility model that limits.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Execution mode of the present utility model relates to a kind of 10kV ultrahigh speed short circuit current cut-off device, comprises quick current-limiting device and the primary cut-out of mutual series connection, and described quick current-limiting device and primary cut-out are also in parallel with a reactor.Also be provided with electric blocking between described quick current-limiting device and the primary cut-out.
The utility model can be comprised of a quick current-limiting device cabinet, high-tension switch cabinet and reactor.It is indoor that the utility model can be installed in reactor, and its line mode is: cable cabinet jacking line, cable cabinet eject line, the busbar cabinet ejects line.When normal, with the current limiting reactor parallel running, institute's electricity is sent into system through the quick current-limiting device.During accident, short circuit current is through the reactor current limliting after the action of quick current-limiting device.
Wherein, the quick current-limiting device can adopt special-purpose large capacity fuse, guarantees that overvoltage level is in the scope of standard code.The quick current-limiting device can adopt the coil type great current sensor, and stands the examination of on-the-spot mal-condition.Measure and instantaneous value and the current changing rate (current rising rate) of tripgear by the measurement short circuit current, when both having reached the response of adjusting, measure and the tripgear action, the quick current-limiting device cut-offs.The outer electro-magnetic shielding cover that can adopt high permeability material to make of quick current-limiting device carries out the special electromagnetic field shield to this quick current-limiting device, the high-frequency signal that reduces to be struck by lightning, produces in the situations such as partial discharge of the single-phase arc grounding of system, isolation switch/switching manipulation and external insulation improves the reliability of product to the interference of transducer.The electronic controller of primary cut-out is Dinuclear Systems, should set up too many levels anti-interference method and differential mode lock modules, improves the functional reliability of electronic controller, the tripping that thoroughly eliminating is in operation occurs and the possibility of malfunction.The low-voltage signal control cabinet, using special UPS is power devices, working power when station service 220V AC power is normal, 220V DC power supply are stand-by power supply.Inverter high-speed starting continued power when 220V AC power decompression in the UPS.Inverter is short-term operation, does not work at ordinary times, should be able to eliminate the additional fault such as product malfunction that the inverter faults itself causes.When product power supply decompression, product should carry out decompression reports to the police and the signal is far passed, makes things convenient for the operations staff in time to find, carries out inspection and maintenance.Measurement and trip device possess the self-checking function of improving, and guarantee redundancy.For preventing misoperation, following reliable electric blocking can also be arranged between quick current-limiting device and the primary cut-out: connection was jumped circuit breaker when (1) large current limitation cut-off action.The measurement of quick current-limiting device will provide tripping operation contact (namely after quick current-limiting device one moves mutually, circuit breaker will separate all three-phase circuits) with tripgear.(2) large current limitation cut-offs and is in the service position, and the short circuit current cut-off device moved drop indicator relay by involution after, just allow the breaker closing of connecting.After large current limitation cut-offs action, can restore electricity rapidly, the interchangeable main part of quick current-limiting device for subsequent use is arranged at the scene, can change after the action.The quick current-limiting device main part that moved can be sent to manufacturer and repair.
Installation and debugging of the present utility model are as follows: quick current-limiting device cabinet, high-tension switch cabinet are remained on same level; Install nearby with reactor, and keep certain distance; The secondary connection conducting that is connected firmly is good in the cabinet; Control loop, signal circuit are unimpeded; Reaying protection test is qualified, and the interlock protection test is normal; The High-Voltage Insulation test passes; Be connected with reactor by the 10kV copper pipe bus, be connected with generator outlet by cable.After the normal also detection safety of debugging, possesses power on condition.After generating set running, deliver to cogeneration high voltage switchyard 10kV bus by flow restricter, again by interconnection switch be connected to the grid (the sintering zone becomes 10kV).
Be not difficult to find, use in parallel with reactor the utility model is connected the quick current-limiting device with primary cut-out after, during normal operation, reactor is by quick current-limiting device and primary cut-out short circuit, therefore reduced the reactive loss of reactor, when system breaks down, the quick current-limiting device disconnects rapidly in signa, reactor puts into operation automatically, with short-circuit current limitation in 26kA, thereby guarantee that generator outlet and higher level's high pressure feed out cabinet (cutting off ability 31.5kA) and can excise reliably short trouble, guarantee system equipment safety; When temporary needs withdraws from or drops into the quick current-limiting device, only need the with it circuit breaker of series connection of operation, just can or reach the standard grade quick current-limiting device off-line, very simple, reliable.
Claims (6)
1. a 10kV ultrahigh speed short circuit current cut-off device is characterized in that, comprises quick current-limiting device and the primary cut-out of mutual series connection, and described quick current-limiting device and primary cut-out are also in parallel with a reactor.
2. 10kV ultrahigh speed short circuit current cut-off device according to claim 1 is characterized in that, described quick current-limiting device is large capacity fuse.
3. 10kV ultrahigh speed short circuit current cut-off device according to claim 2 is characterized in that, described large capacity fuse adopts the coil type current sensor.
4. 10kV ultrahigh speed short circuit current cut-off device according to claim 1 is characterized in that, described quick current-limiting device also is equipped with the electromagnetic-field-shielded cover of being made by high permeability material outward.
5. 10kV ultrahigh speed short circuit current cut-off device according to claim 1 is characterized in that, the controller of described primary cut-out adopts Dinuclear Systems.
6. 10kV ultrahigh speed short circuit current cut-off device according to claim 1 is characterized in that, also is provided with electric blocking between described quick current-limiting device and the primary cut-out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220387756 CN202737434U (en) | 2012-08-07 | 2012-08-07 | 10kV ultrahigh speed short-circuit current interrupter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220387756 CN202737434U (en) | 2012-08-07 | 2012-08-07 | 10kV ultrahigh speed short-circuit current interrupter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202737434U true CN202737434U (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220387756 Expired - Fee Related CN202737434U (en) | 2012-08-07 | 2012-08-07 | 10kV ultrahigh speed short-circuit current interrupter |
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| Country | Link |
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| CN (1) | CN202737434U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154609A (en) * | 2017-05-02 | 2017-09-12 | 华北电力大学 | A kind of high reliability high-speed switch type fault current limiter |
| CN107607810A (en) * | 2017-09-01 | 2018-01-19 | 中铁电气化局集团有限公司 | A kind of rail traction supply current Distribution Test system |
-
2012
- 2012-08-07 CN CN 201220387756 patent/CN202737434U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154609A (en) * | 2017-05-02 | 2017-09-12 | 华北电力大学 | A kind of high reliability high-speed switch type fault current limiter |
| CN107607810A (en) * | 2017-09-01 | 2018-01-19 | 中铁电气化局集团有限公司 | A kind of rail traction supply current Distribution Test system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20150807 |
|
| EXPY | Termination of patent right or utility model |