CN106936118A - A kind of HDF Large Copacities busbar voltage holding meanss - Google Patents
A kind of HDF Large Copacities busbar voltage holding meanss Download PDFInfo
- Publication number
- CN106936118A CN106936118A CN201710246884.2A CN201710246884A CN106936118A CN 106936118 A CN106936118 A CN 106936118A CN 201710246884 A CN201710246884 A CN 201710246884A CN 106936118 A CN106936118 A CN 106936118A
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- China
- Prior art keywords
- zinc oxide
- current limliting
- switch
- incoming cables
- hdf
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
Abstract
The present invention relates to a kind of HDF Large Copacities busbar voltage holding meanss; including current limliting zinc oxide FR, Fast Switch with Large Capacity FSR, high pressure quick break fuse FU and current-limiting protection system; the end of incoming cables of the current limliting zinc oxide FR is connected through high-speed eddy switch K1, G1 with the end of incoming cables of power distribution cabinet successively; the leading-out terminal of current limliting zinc oxide FR is connected through isolation switch G2 with the leading-out terminal of power distribution cabinet, and the Fast Switch with Large Capacity FSR and high pressure quick break fuse FU is parallel to the two ends of current limliting zinc oxide FR；The current-limiting protection system is parallel to the two ends of current limliting zinc oxide FR, for protecting current limliting zinc oxide FR short circuits after be not burned.The present invention can in time cut off isolation short trouble, prevent the further expansion of short trouble scope, not decompression of the bus in feeder line branch, short-circuit failure be effectively ensured, while being avoided because interruption maintenance brings economic loss by isolation switch G1, G2, G3.
Description
Technical field
Technical field is kept the present invention relates to electrical system bus voltage, and in particular to a kind of HDF Large Copacities busbar voltage
Holding meanss.
Background technology
As expanding economy, the sharp increase of business electrical load, power network median generatrix institute band branch road are more and more, work as mother
A certain bar branch road is short-circuited under line, and drop is serious suddenly for the busbar voltage being connected with the branch road, and the remaining voltage of bus is generally below
The 20% of rated voltage, only when the branch breaker cut-offs, has cut off short trouble, and busbar voltage could be recovered.Busbar voltage
From dropping to suddenly, to recover this period be exactly time that breaker cut-offs short trouble, and about at 0.1 second or so, that is, microcomputer is comprehensive
Close the time of protection failure judgement（20ms-30ms）, add breaker intrinsic actuation time（40ms-80ms）, along with electric arc
Zero-crossing timing（16ms or so）.There is this period that is recessed in busbar voltage, and Enterprise Power System is referred to as " shaking electricity "." shaking electricity "
During generation, busbar voltage is very low, interrupts the load running of some failures that are not short-circuited, such as frequency converter, motor, relay
Device, magnetic valve etc..These loads to " shaking electricity " significant reaction are referred to as sensitive loads, have been characterized in mechanical movement and have had
The presence of electric energy or magnetic energy energy-storage travelling wave tube.The motor used in enterprise mostly asynchronous machine, and the rotating excitation field of asynchronous machine
Holding comes from the reactive power support of power network, and busbar voltage is very low during certain branch, short-circuit, and the asynchronous machine on other branch roads cannot
Reactive power support, and it is also general in below 30ms to short dot output short circuit current, the short circuit time constant τ of asynchronous machine, " shake
The time, the magnetic field of the asynchronous machine exponentially decayed was depleted close to 3 τ for electricity ", and voltage is extensive after short circuit trouble point excision
Multiple moment, power network rebuilds magnetic field and generates the 5-7 times of impact of rated current to asynchronous machine, causes protective relaying maloperation to make.
When usual busbar voltage is below 50%, sensitive loads tolerable " shaking electricity " time is not more than 30ms.When foreign network is short-circuited
Failure, can be by area's Intranet entirety（All loads）Or part important load is switched to certain in another foreign network, but area's Intranet
Branch road is short-circuited cannot integrally be have switched, and can only partly be switched.If important sensitive loads are artificially concentrated in area's Intranet
Originally few to a small number of branch roads or its circuitry number, part switching can be to solve area's Intranet short circuit to cause asking for important load stoppage in transit
Topic, necessary condition is that to have the suitable foreign network that can switch.If sensitive loads branch road important in area's Intranet is a lot, part
The cost of switching is just too big, if changeable foreign network condition does not possess, then to solve area's Intranet and shake electric problem, adopt
It is desirable scheme with bus residual voltage holding meanss.
The bus residual voltage holding meanss that existing market is used all are to control female guarantor's reactor by Fast Switch with Large Capacity
Input, when normally running, Fast Switch with Large Capacity short circuit is female to protect reactor, when branch road is short-circuited failure, high-capacity and high-speed
Mother, is protected reactor and is concatenated into circuit by switch separating brake, occurs to need 18ms to Fast Switch with Large Capacity separating brake from short trouble,
Short trouble is possible to be expanded to bus bar side, will cause larger range of Power System Shortcuts.
The content of the invention
It is an object of the invention to provide a kind of HDF Large Copacities busbar voltage holding meanss, the apparatus structure is simple, safety
Reliable, action is fast, can in time cut off isolation short trouble, prevents the further expansion of short trouble scope, and mother is effectively ensured
Not decompression of the line in feeder line branch, short-circuit failure.
To achieve the above object, present invention employs following technical scheme：Opened including current limliting zinc oxide FR, high-capacity and high-speed
FSR, high pressure quick break fuse FU and current-limiting protection system are closed, the end of incoming cables of the current limliting zinc oxide FR switchs through high-speed eddy successively
K1, G1 are connected with the end of incoming cables of power distribution cabinet, the leading-out terminal of current limliting zinc oxide FR through isolation switch G2 and power distribution cabinet leading-out terminal phase
Even, the Fast Switch with Large Capacity FSR and high pressure quick break fuse FU is parallel to the two ends of current limliting zinc oxide FR；The current limliting is protected
Protecting system is parallel to the two ends of current limliting zinc oxide FR, for protecting current limliting zinc oxide FR short circuits after be not burned.
In such scheme, the current-limiting protection system includes electric discharge damper RL, the end of incoming cables of the electric discharge damper RL
End of incoming cables with current limliting zinc oxide FR is connected, and its leading-out terminal switchs the leading-out terminal phase of K0 and current limliting zinc oxide FR through high-speed eddy
Even.
In such scheme, the electric discharge damper RL is made up of resistance and inductance in parallel, and the electric discharge damper RL's enters
Line end is connected with the end of incoming cables of current limliting zinc oxide FR, and its leading-out terminal is connected with the end of incoming cables of high-speed eddy switch K0.
In such scheme, also including isolation switch G3, the end of incoming cables of the isolation switch G3 and the inlet wire of isolation switch G1
End is connected, and its leading-out terminal is connected with the leading-out terminal of isolation switch G2.
In such scheme, the Fast Switch with Large Capacity FSR controls it to cut-off by the controller in power distribution cabinet.
The high-speed eddy switch K0 is vacuum interrupter arc extinguishing breaker, by the controller control in power distribution cabinet
It is made to cut-off.
In such scheme, the high-speed eddy switch K1 is vacuum interrupter arc extinguishing breaker.
As shown from the above technical solution, it is excellent that the present invention has simple structure, safe and reliable, action fast and drop-out current is big etc.
Point, the current limliting zinc oxide FR in the HDF Large Copacity busbar voltage holding meanss can in time cut off isolation short circuit event in 0.15ms
Barrier, prevents the further expansion of short trouble scope, and not decompression of the bus in feeder line branch, short-circuit failure is effectively ensured, while
Avoided because interruption maintenance brings economic loss by isolation switch G1, G2, G3.
Brief description of the drawings
Fig. 1 is electrical schematic diagram of the invention.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in figure 1, the HDF Large Copacity busbar voltage holding meanss of the present embodiment, including it is installed on the current limliting oxygen in power distribution cabinet
Change zinc FR, Fast Switch with Large Capacity FSR, high pressure quick break fuse FU and current-limiting protection system, the end of incoming cables of current limliting zinc oxide FR
It is connected with the end of incoming cables of power distribution cabinet through high-speed eddy switch K1, G1 successively, the leading-out terminal of current limliting zinc oxide FR is through isolation switch G2
It is connected with the leading-out terminal of power distribution cabinet, Fast Switch with Large Capacity FSR and high pressure quick break fuse FU are parallel to current limliting zinc oxide FR's
Two ends；Current-limiting protection system is parallel to the two ends of current limliting zinc oxide FR, for protecting current limliting zinc oxide FR short circuits after be not burned.
The end of incoming cables of isolation switch G3 is connected with the end of incoming cables of isolation switch G1, and its leading-out terminal is connected with the leading-out terminal of isolation switch G2.
High pressure quick break fuse FU is used for quick fuse during short circuit, and high pressure quick break fuse FU fusing generation arc voltages make current limliting zinc oxide FR
Conducting.Itself produce a larger impedance after current limliting zinc oxide FR conductings, can effective limiting short-circuit current intensity, greatly reduce
Impact of the short circuit current to electrical equipment.Fast Switch with Large Capacity FSR, for power system be short-circuited failure when, by high pressure
Quick break fuse FU is quickly connected in series in loop.
The present embodiment, current-limiting protection system is made up of electric discharge damper RL and high-speed eddy switch K0, and discharge damper
The end of incoming cables of RL is connected with the end of incoming cables of current limliting zinc oxide FR, and its leading-out terminal is through high-speed eddy switch K0 and current limliting zinc oxide FR's
Leading-out terminal is connected.Electric discharge damper RL limits its dash current after being used for current limliting zinc oxide FR short circuits, prevents current limliting zinc oxide
FR is damaged due to excessively stream, current limliting zinc oxide FR both end voltages is limited in a relatively low level, substantially increases limit
The frequency of the input current limliting of stream zinc oxide FR.High-speed eddy switch K0 is used for short trouble and cuts off backed off after random current limliting zinc oxide
FR.In the present embodiment, electric discharge damper RL is made up of resistance and inductance in parallel.
Fast Switch with Large Capacity FSR and high-speed eddy switch K0 control it to open by the controller in power distribution cabinet
It is disconnected；High-speed eddy switchs K0 and high-speed eddy opens K1 and is vacuum interrupter arc extinguishing breaker.When generation in circuit on power system
Short trouble, after short trouble excision, controller controls high-speed eddy to switch K0 combined floodgates immediately, so as to current limliting zinc oxide FR is short
Connect, realize zero loss of normal operation current limliting zinc oxide FR.
Operation principle：When under bus feeder line any branch road be short-circuited failure when, Fast Switch with Large Capacity FSR first break
Open, high pressure quick break fuse FU is quickly connected in series in loop, high pressure quick break fuse FU quick fuses, high pressure quick break fuse FU fusing
Producing arc voltage turns on current limliting zinc oxide FR, itself a larger impedance is produced after current limliting zinc oxide FR conductings, by current limliting oxygen
Change the size that the short-circuit current of this feeder line is restricted to zinc FR the rated current of this feeder line, so as to effectively prevent bus
Make whole piece bus loss of pressure because a branch road breaks down, greatly reduce the scope of short trouble.When current limliting zinc oxide FR inputs
When, fault branch short circuit current is substantially reduced, and branch breaker can effectively cut off the short trouble of the branch road；When the branch circuit break
When device is because breaking down, it is impossible to which when quickly cutting off the short trouble of this branch road, fast acting control system controls high-speed eddy to open immediately
K1 separating brakes are closed, whole piece branch road is isolated, prevent the further expansion of short trouble.When short trouble is by this branch breaker
After excision, fast acting control system control high-speed eddy switch K0 is closed immediately, and current limliting zinc oxide FR is carried out into short circuit, prevents female limit
Stream zinc oxide FR puts into the actual motion problem of a large amount of reactive loss of consumption and user terminal brownout for a long time.
Service without power-off is realized by isolation switch G1, G2, G3, reduces the power failure range of maintenance repair and trouble hunting,
The reliability and security of power supply are greatly improved, while avoiding because interruption maintenance brings economic loss.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to model of the invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art are to technical side of the invention
Various modifications and improvement that case is made, all should fall into the protection domain of claims of the present invention determination.
Claims (7)
1. a kind of HDF Large Copacities busbar voltage holding meanss, it is characterised in that：Opened including current limliting zinc oxide FR, high-capacity and high-speed
FSR, high pressure quick break fuse FU and current-limiting protection system are closed, the end of incoming cables of the current limliting zinc oxide FR switchs through high-speed eddy successively
K1, G1 are connected with the end of incoming cables of power distribution cabinet, the leading-out terminal of current limliting zinc oxide FR through isolation switch G2 and power distribution cabinet leading-out terminal phase
Even, the Fast Switch with Large Capacity FSR and high pressure quick break fuse FU is parallel to the two ends of current limliting zinc oxide FR；The current limliting is protected
Protecting system is parallel to the two ends of current limliting zinc oxide FR, for protecting current limliting zinc oxide FR short circuits after be not burned.
2. HDF Large Copacities busbar voltage holding meanss according to claim 1, it is characterised in that：The current-limiting protection system
System includes the damper RL that discharges, and the end of incoming cables of the electric discharge damper RL is connected with the end of incoming cables of current limliting zinc oxide FR, its outlet
End is connected through high-speed eddy switch K0 with the leading-out terminal of current limliting zinc oxide FR.
3. HDF Large Copacities busbar voltage holding meanss according to claim 2, it is characterised in that：The electric discharge damper
RL is made up of resistance and inductance in parallel, and the end of incoming cables of the electric discharge damper RL is connected with the end of incoming cables of current limliting zinc oxide FR, its
Leading-out terminal is connected with the end of incoming cables of high-speed eddy switch K0.
4. HDF Large Copacities busbar voltage holding meanss according to claim 1, it is characterised in that：Also include isolation switch
G3, the end of incoming cables of the isolation switch G3 is connected with the end of incoming cables of isolation switch G1, the outlet of its leading-out terminal and isolation switch G2
End is connected.
5. HDF Large Copacities busbar voltage holding meanss according to claim 1, it is characterised in that：The high-capacity and high-speed
Switch FSR controls it to cut-off by the controller in power distribution cabinet.
6. HDF Large Copacities busbar voltage holding meanss according to claim 2, it is characterised in that：The high-speed eddy is opened
Pass K0 is vacuum interrupter arc extinguishing breaker, controls it to cut-off by the controller in power distribution cabinet.
7. HDF Large Copacities busbar voltage holding meanss according to claim 1, it is characterised in that：The high-speed eddy is opened
Pass K1 is vacuum interrupter arc extinguishing breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710246884.2A CN106936118A (en) | 2017-04-16 | 2017-04-16 | A kind of HDF Large Copacities busbar voltage holding meanss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710246884.2A CN106936118A (en) | 2017-04-16 | 2017-04-16 | A kind of HDF Large Copacities busbar voltage holding meanss |
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| CN106936118A true CN106936118A (en) | 2017-07-07 |
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| CN201710246884.2A Pending CN106936118A (en) | 2017-04-16 | 2017-04-16 | A kind of HDF Large Copacities busbar voltage holding meanss |
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Citations (6)
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|---|---|---|---|---|
| CN202353174U (en) * | 2011-11-16 | 2012-07-25 | 安徽曼瑞特电气有限公司 | Combined protector of high-voltage current limiting fuse |
| CN202424110U (en) * | 2011-11-16 | 2012-09-05 | 安徽曼瑞特电气有限公司 | High-capacity fast switching device |
| WO2013176787A1 (en) * | 2012-05-24 | 2013-11-28 | Northeastern University | Fault current limiter |
| CN205646794U (en) * | 2016-05-12 | 2016-10-12 | 安徽尚途电力保护设备有限公司 | Explosion bridge type generating line residual voltage holding device |
| CN106099938A (en) * | 2016-06-24 | 2016-11-09 | 安徽尚途电力保护设备有限公司 | A kind of high-voltage fence series compensation device |
| CN205724858U (en) * | 2016-06-16 | 2016-11-23 | 安徽徽电科技股份有限公司 | A kind of series resonance bus residual voltage holding means |
-
2017
- 2017-04-16 CN CN201710246884.2A patent/CN106936118A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202353174U (en) * | 2011-11-16 | 2012-07-25 | 安徽曼瑞特电气有限公司 | Combined protector of high-voltage current limiting fuse |
| CN202424110U (en) * | 2011-11-16 | 2012-09-05 | 安徽曼瑞特电气有限公司 | High-capacity fast switching device |
| WO2013176787A1 (en) * | 2012-05-24 | 2013-11-28 | Northeastern University | Fault current limiter |
| CN205646794U (en) * | 2016-05-12 | 2016-10-12 | 安徽尚途电力保护设备有限公司 | Explosion bridge type generating line residual voltage holding device |
| CN205724858U (en) * | 2016-06-16 | 2016-11-23 | 安徽徽电科技股份有限公司 | A kind of series resonance bus residual voltage holding means |
| CN106099938A (en) * | 2016-06-24 | 2016-11-09 | 安徽尚途电力保护设备有限公司 | A kind of high-voltage fence series compensation device |
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Application publication date: 20170707 |