CN104505829B - Power supply system for electrolytic aluminum plant - Google Patents
Power supply system for electrolytic aluminum plant Download PDFInfo
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- CN104505829B CN104505829B CN201510016138.5A CN201510016138A CN104505829B CN 104505829 B CN104505829 B CN 104505829B CN 201510016138 A CN201510016138 A CN 201510016138A CN 104505829 B CN104505829 B CN 104505829B
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- Prior art keywords
- bus
- optical fiber
- switch device
- protection
- differential current
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/267—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for parallel lines and wires
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a power supply system for an electrolytic aluminum plant. The power supply system comprises at least one transformer substation, at least one switch station, a first line and a second line, wherein the first line and the second line are connected in parallel; each transformer substation comprises a first bus, a second bus, a second bus; at least one first bus-bar switch device, a first switch device, a second switch device, at least one set of first microcomputer bus protection device for protecting the first bus and the second bus, a first optical fiber phase-splitting current differential line protection circuit and a second optical fiber phase-splitting current differential line protection circuit; the first and second optical fiber phase-splitting current differential line protection circuits are used for respectively protecting the first line and the second line; each switch station comprises a third bus, a fourth bus, at least one second bus switch device, a third switch device, a fourth switch device, at least one set of second microcomputer bus protection device for protecting the third bus and the fourth bus, a third optical fiber phase-splitting current differential line protection circuit and a fourth optical fiber phase-splitting current differential line protection circuit; the third and fourth optical fiber phase-splitting current differential line protection circuits are used for respectively protecting the first line and the second line. According to the power supply system for the electrolytic aluminum plant, the power is supplied through two circuits, so that the safety of power supply is greatly improved, and the line loss can be greatly reduced.
Description
Technical field
The present invention relates to technical field of electric power, particularly to a kind of electric power system for electrolytic aluminium factory.
Background technology
Aluminium electroloysis load is first order load, the electrolysis bath of potroom, multifunction crane, air compression station, transforming-rectifying substation etc.
Load is also first order load.The 95% of the first order load Zhan Quan factory load of electrolytic aluminium plant.The electrolysis system in Large size Aluminium industrial base
Row electric current is also developing to super large direction.
At present, the large-scale aluminium manufacturer of China develops into the pre-baking tank of 500ka, and commutating voltage reaches 1350v, produces aluminum amount 350,000 per year
More than ton.Aluminium electroloysis (includes maintenance and ordinary accident) under normal circumstances and does not allow to have a power failure.Under extreme case it is allowed to have a power failure 30～
45 minutes.Electrolytic aluminium factory electricity supplying and using system, the selection of electrical equipment, equipment the method for operation it is necessary to consider that maintenance and one
As all must not affect aluminum electrolysis in the case of fault, and should not reduce load and Faradaic current etc..Electrolytic aluminium plant should have
Two (or more) independent current source powers, the safety of power supply, reliability should be put in the first place.
In correlation technique, the traditional power supply mode of electrolytic aluminium factory is: adopts power supply entering line, double-bus mode.Actual fortune
During row, electric power incoming line or wherein one circuit on-load, another circuit is stand-by heat, and full factory power becomes and operates in inlet wire
Bus section, busbar section, rectifier transformer is run on another section of bus by bus.
In correlation technique, the traditional power supply mode of electrolytic aluminium factory has the drawback that: the relay protection of mains side and load side
Two-wire on-load and when breaking down simultaneously, the requirement of disjunction fault can not be met, security reliability is poor.
Content of the invention
The purpose of the present invention is intended at least solve to a certain extent one of above-mentioned technical problem.
For this reason, it is an object of the present invention to proposing a kind of electric power system for electrolytic aluminium factory, this is used for electrolytic aluminium
The electric power system of factory breaches the traditional powering mode of electrolytic aluminium factory, and Supply Security and reliability greatly improve.
For reaching above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of electric power system for electrolytic aluminium factory, should
For electrolytic aluminium factory electric power system include at least one transformer station, at least one switchyard and each described transformer station and
First line in parallel and the second circuit between corresponding switchyard, wherein, each described transformer station provides first mother of 220kv
Line and the second bus, each described transformer station includes: at least one first bus connection switch device, first switch device and second are opened
Close device, at least one first bus connection switch device described, described first switch device and described second switch device respectively with
Described first bus is connected with described second bus；At least a set of first PC bus protection device, described at least a set of first
PC bus protection device is used in described first bus and/or described second bus-bar fault, disconnect described at least one the
One bus connection switch device is to protect to described first bus and described second bus；First optical fiber differential current circuit
Protection device and the second optical fiber differential current line protective devices, described first optical fiber differential current route protection dress
Put in described first line fault, disconnecting described first switch device to protect to described first line, described
Second optical fiber differential current line protective devices are used for, in described second line fault, disconnecting described second switch device
To protect to described second circuit；Each described switchyard has triple bus-bar and the 4th bus, described triple bus-bar and
Described 4th bus is used for powering for electrolytic aluminium factory, and each described switchyard includes: at least one second bus connection switch device, the
Three switching devices and the 4th switching device, at least one second bus connection switch device described, described 3rd switching device and described
4th switching device is connected with described triple bus-bar and described 4th bus respectively, and described first switch device is opened with the described 3rd
Close, between device, there is described first line, between described second switch device and described 4th switching device, have described second
Circuit；At least a set of second PC bus protection device, described at least a set of second PC bus protection device is used for described
When triple bus-bar and/or described four bus-bar fault, disconnect at least one second bus connection switch device described with to the described 3rd
Bus and described 4th bus are protected；3rd optical fiber differential current line protective devices and the 4th optical fiber split-phase electric current
Differential line protection device, described 3rd optical fiber differential current line protective devices are used in described first line fault
When, disconnect described 3rd switching device to protect to described first line, described 4th optical fiber differential current circuit
Protection device is used for, in described second line fault, disconnecting described 4th switching device to protect to described second circuit
Shield.
The electric power system for electrolytic aluminium factory that the embodiment of the present invention proposes, by each transformer station, corresponding switchyard
And between each transformer station and corresponding switchyard first line in parallel and the second circuit realize electrolytic aluminium factory is carried out double
Loop power supply, breaches the traditional powering mode of electrolytic aluminium factory, and in the first bus and/or the second bus-bar fault, at least
A set of first PC bus protection device disconnects at least one first bus connection switch device to enter to the first bus and the second bus
Row protection, in triple bus-bar and/or four bus-bar faults, at least a set of second PC bus protection device disconnects at least one
Second bus connection switch device to protect to triple bus-bar and the 4th bus, in first line fault, the first optical fiber split-phase
Current differential line protective devices disconnect first switch device, and the 3rd optical fiber differential current line protective devices disconnect
3rd switching device to protect to first line, in the second line fault, protect by the second optical fiber differential current circuit
Protection unit disconnect second switch device, and the 4th optical fiber differential current line protective devices disconnect the 4th switching device with
Second circuit is protected, Supply Security and reliability greatly improve.
Further, in one embodiment of the invention, when described first switch device cannot disconnect, the described 3rd
Optical fiber differential current line protective devices disconnect described 3rd switching device, and described at least a set of first microcomputer bus
Protection device disconnects at least one first bus connection switch device described；When described second switch device cannot disconnect, described
Four optical fiber differential current line protective devices disconnect described 4th switching device, and described at least a set of first microcomputer is female
Line protection device disconnects at least one first bus connection switch device described；When described 3rd switching device cannot disconnect, described
First optical fiber differential current line protective devices disconnect described first switch device, and described at least a set of second microcomputer
Busbar protective device disconnects at least one second bus connection switch device described；When described 4th switching device cannot disconnect, institute
State the second optical fiber differential current line protective devices and disconnect described second switch device, and described at least a set of second micro-
Machine busbar protective device disconnects at least one second bus connection switch device described.
Further, in one embodiment of the invention, at least one first bus connection switch device described, described at least
One the second bus connection switch device, described first switch device, described second switch device, described 3rd switching device and described
4th switching device is chopper.
Further, in one embodiment of the invention, each described transformer station also includes: the first breaker failure opens
Dynamic and auto recloser, described first breaker failure start and auto recloser as described transformer station near after
Standby protection and the remote back-up protection of corresponding switchyard.
Further, in one embodiment of the invention, each described transformer station also includes: the first three-stage spaced apart
It is grounded zero sequence direction current protective device from protection device, the first three-stage ground distance protection device and the first four-part form.
Further, in one embodiment of the invention, each described switchyard also includes: the second breaker failure opens
Dynamic and auto recloser, described second breaker failure start and auto recloser as described switchyard near after
Standby protection and the remote back-up protection of corresponding transformer station.
Further, in one embodiment of the invention, each described switchyard also includes the second three-stage spaced apart
It is grounded zero sequence direction current protective device from protection device, the second three-stage ground distance protection device and the second four-part form.
Further, in one embodiment of the invention, described at least a set of first PC bus protection device, described
First optical fiber differential current line protective devices, described second optical fiber differential current line protective devices and described
One breaker failure starts and the protection signal of auto recloser is transmitted by the first default optical fiber；Described at least one
Cover the second PC bus protection device, described 3rd optical fiber differential current line protective devices, described 4th optical fiber split-phase
Current differential line protective devices and described second breaker failure starts and the protection signal of auto recloser passes through the
Two default optical fiber are transmitted.
Further, in one embodiment of the invention, at least one transformer station described and at least one switch described
Communication modes between standing are double optical-fibre communications.
Further, in one embodiment of the invention, described first line and described second circuit are using double with tower
Return and set up.
The aspect that the present invention adds and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and easy to understand, wherein:
Fig. 1 is the block diagram according to the embodiment of the present invention for the electric power system of electrolytic aluminium factory；
Fig. 2 is to be shown for the square frame of transformer station in the electric power system of electrolytic aluminium factory and switchyard according to the embodiment of the present invention
It is intended to；
Fig. 3 is Hui Li transformer station and gushes the schematic diagram that prosperous switchyard adopts traditional powering mode；
Fig. 4 supplies by the double loop being adopted according to the electric power system for electrolytic aluminium factory of one specific embodiment of the present invention
The schematic diagram of power mode；And
Fig. 5 is showing when being broken down according to the electric power system for electrolytic aluminium factory of one specific embodiment of the present invention
It is intended to.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example for realizing the different structure of the present invention.For letter
Change disclosure of the invention, hereinafter the part and setting of specific examples is described.Certainly, they are only merely illustrative, and
Purpose does not lie in the restriction present invention.Additionally, the present invention can in different examples repeat reference numerals and/or letter.This heavy
It is for purposes of simplicity and clarity again, itself do not indicate the relation between discussed various embodiment and/or setting.This
Outward, the invention provides various specific technique and material example, but those of ordinary skill in the art can be appreciated that
The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it
" on " structure can include the first and second features and be formed as the embodiment of directly contact it is also possible to include other feature shape
Become the embodiment between the first and second features, such first and second features may not be directly contact.
In describing the invention, it should be noted that unless otherwise prescribed and limit, term " installation ", " being connected ",
" connection " should be interpreted broadly, for example, it may be the connection of mechanical connection or electrical connection or two element internals, can
To be to be joined directly together it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
The electric power system for electrolytic aluminium factory of proposition according to embodiments of the present invention to be described with reference to the accompanying drawings.
As shown in figure 1, the electric power system for electrolytic aluminium factory of the embodiment of the present invention includes at least one transformer station 1, extremely
Few first line 3 in parallel between a switchyard 2 and each transformer station 1 and corresponding switchyard 2 and the second circuit 4.Its
In, as shown in Fig. 2 each transformer station 1 provides the first bus 11 and second bus 12 of 220kv, each transformer station 1 includes: extremely
A few first bus connection switch device 13, first switch device 14, second switch device 15, at least a set of first microcomputer bus are protected
Protection unit 16, the first optical fiber differential current line protective devices 17 and the second optical fiber differential current line protective devices
18.Wherein, at least one first bus connection switch device 13, first switch device 14 and second switch device 15 are female with first respectively
Line 11 is connected with the second bus 12.At least a set of first PC bus protection device 16 is used in the first bus 11 and/or second
During bus 12 fault, disconnect at least one first bus connection switch device 13 to protect to the first bus 11 and the second bus 12
Shield.First optical fiber differential current line protective devices 17 are used for, in first line 3 fault, disconnecting first switch device 14
To protect to first line 3, the second optical fiber differential current line protective devices 18 are used in the second circuit 4 fault
When, disconnect second switch device 15 to protect to the second circuit 4.It is female that each switchyard 2 has triple bus-bar 21 and the 4th
Line 22, triple bus-bar 21 and the 4th bus 22 are used for powering for electrolytic aluminium factory, and each switchyard 2 includes: at least one second mother
Connection switching device 23, the 3rd switching device 24, the 4th switching device 25, at least a set of second PC bus protection device 26, the
Three optical fiber differential current line protective devices 27 and the 4th optical fiber differential current line protective devices 28.Wherein, extremely
A few second bus connection switch device 23, the 3rd switching device 24 and the 4th switching device 25 respectively with triple bus-bar 21 and the 4th
Bus 22 is connected, and has first line 3 between first switch device 14 and the 3rd switching device 24, second switch device 15 and the
There is between four switching devices 25 second circuit 4.At least a set of second PC bus protection device 26 is used in triple bus-bar 21
And/or during the 4th bus 22 fault, disconnect at least one second bus connection switch device 23 with to triple bus-bar 21 and the 4th bus
22 are protected.3rd optical fiber differential current line protective devices 27 are used for, in first line 3 fault, disconnecting the 3rd and opening
Close device 24 to protect to first line 3, the 4th optical fiber differential current line protective devices 28 are used in the second line
During 4 fault of road, disconnect the 4th switching device 25 to protect to the second circuit 4.
It should be noted that for, in the electric power system of electrolytic aluminium factory, each transformer station 1 includes at least a set of first microcomputer
Busbar protective device 16, the first optical fiber differential current line protective devices 17 and the second optical fiber differential current circuit are protected
Protection unit 18, and each switchyard 2 includes at least a set of second PC bus protection device 26, the 3rd optical fiber split-phase difference between current
The configuration of the multiple protective such as moving-wire line protection device 27 and the 4th optical fiber differential current line protective devices 28 is it is ensured that in list
Individual protection location (first line 3, the second circuit 4, the first bus 11, second bus 12 etc.) remains able to confession when breaking down
Electric system is effectively protected.
Further, in one embodiment of the invention, when first switch device 14 cannot disconnect, the 3rd optical fiber divides
Phase current differential line protective devices 27 disconnect the 3rd switching device 24, and at least a set of first PC bus protection device 16
Disconnect at least one first bus connection switch device 13.Further, in another embodiment of the present invention, when second switch device
When part 15 cannot disconnect, the 4th optical fiber differential current line protective devices 28 disconnect the 4th switching device 25, and at least
A set of first PC bus protection device 16 disconnects at least one first bus connection switch device 13.Further, the present invention's
In further embodiment, when the 3rd switching device 24 cannot disconnect, the first optical fiber differential current line protective devices 17
Disconnect first switch device 14, and at least a set of second PC bus protection device 26 disconnects at least one second bus connection switch
Device 23.Further, in yet another embodiment of the present invention, when the 4th switching device 25 cannot disconnect, the second optical fiber
Differential current line protective devices 18 disconnect second switch device 15, and at least a set of second PC bus protection device
26 at least one second bus connection switch device 23 of disconnection.
In one embodiment of the invention, first line 3 and the second circuit 4 parallel connection are powered to the switchyard 2 of 220kv,
And form the first current supply circuit and the second current supply circuit respectively, and when wherein one current supply circuit maintenance, another current supply circuit
The peak load of the energy switchyard 2 of feed 220kv completely, and line fault, the 220kv bus-bar fault of transformer station 1, switchyard 2
Bus-bar fault when all can ensure that a current supply circuit is powered, do not result in electrolytic aluminium factory full cut-off electricity, breach electrolytic aluminium factory
Traditional powering mode.The double circuit power supply pattern that the electric power system for electrolytic aluminium factory of the present invention is adopted, either from
Circuit design or from the design of switch protection, all has good transplantability, cannot be only used for aluminium electrolysis enterprise, can also can
Have high demands in some other power supply reliability, high energy consumption, all can carry out technically for the enterprise that runs without interruption by transplanting
Reliability transplanting, there is good promotion prospect.
Further, in one embodiment of the invention, at least one first bus connection switch device 13, at least one
Two bus connection switch devices 23, first switch device 14, second switch device 15, the 3rd switching device 24 and the 4th switching device 25
It can be chopper.
Further, in one embodiment of the invention, each transformer station 1 can also include: the first breaker failure
Start and auto recloser 19, first breaker failure start and auto recloser 19 as transformer station 1 near after
Standby protection and the remote back-up protection of corresponding switchyard 2.It should be noted that being started using the first breaker failure and automatically weighing
Closing device 19, can be used as to the first optical fiber differential current line protective devices 17 and the second optical fiber used as back-up protection
The main protection sensitivity of differential current line protective devices 18 is not enough or supplementing of some other failure condition is protected.Enter one
Step ground, in one embodiment of the invention, each transformer station 1 can also include: the first three-stage phase distance protection device
120th, the first three-stage ground distance protection device 121 and the first four-part form ground connection zero sequence direction current protective device 122.Need
Illustrate, the first three-stage phase distance protection device 120 and the first four-part form are grounded zero sequence direction current protective device 122
There is good complementary action, the first three-stage phase distance protection device 120 sensitivity is good, is mainly used in circuit alternate short
Road, can effective failure judgement scope, but the first three-stage phase distance protection device 120 need simultaneously using voltage and
The magnitude of current is judged, the probability that the first three-stage phase distance protection device 120 breaks down when being protected is than simple
Magnitude of current protection big many.First four-part form ground connection zero sequence direction current protective device 122 not only can be effectively to single-phase
Earth fault is protected, and simultaneously when the secondary circuit of the first three-stage phase distance protection device 120 breaks down, also may be used
To protect as supplementing of the first three-stage phase distance protection device 120.
Further, in one embodiment of the invention, each switchyard 2 can also include: the second breaker failure
Start and auto recloser 29, second breaker failure start and auto recloser 29 as switchyard 2 near after
Standby protection and the remote back-up protection of corresponding transformer station 1.It should be noted that being started using the second breaker failure and automatically weighing
Closing device 29, can be used as to the 3rd optical fiber differential current line protective devices 27 and the 4th optical fiber used as back-up protection
The main protection sensitivity of differential current line protective devices 28 is not enough or supplementing of some other failure condition is protected.Enter one
Step ground, in one embodiment of the invention, each switchyard 2 can also include the second three-stage phase distance protection device
220th, the second three-stage ground distance protection device 221 and the second four-part form ground connection zero sequence direction current protective device 222.Need
Illustrate, the second three-stage phase distance protection device 220 and the second four-part form are grounded zero sequence direction current protective device 222
There is good complementary action, the second three-stage phase distance protection device 220 sensitivity is good, is mainly used in circuit alternate short
Road, can effective failure judgement scope, but the second three-stage phase distance protection device 220 need simultaneously using voltage and
The magnitude of current is judged, the probability that the second three-stage phase distance protection device 220 breaks down when being protected is than simple
Magnitude of current protection big many.Second four-part form ground connection zero sequence direction current protective device 222 not only can be effectively to single-phase
Earth fault is protected, and simultaneously when the secondary circuit of the second three-stage phase distance protection device 220 breaks down, also may be used
To protect as supplementing of the second three-stage phase distance protection device 220.
Further, in one embodiment of the invention, at least a set of first PC bus protection device 16, the first light
Fine differential current line protective devices 17, the second optical fiber differential current line protective devices 18 and the first chopper lose
Spirit starts and the protection signal of auto recloser 19 can be preset optical fiber by first and be transmitted, and at least a set of the
Two PC bus protection devices 26, the 3rd optical fiber differential current line protective devices 27, the 4th optical fiber differential current
The protection signal of line protective devices 28 and the startup of the second breaker failure and auto recloser 29 can be pre- by second
If optical fiber is transmitted.
Further, in one embodiment of the invention, between at least one transformer station 1 and at least one switchyard 2
Communication modes can be double optical-fibre communications.Further, in one embodiment of the invention, first line 3 and the second line
Road 4 can be set up using common-tower double-return, thus effectively reducing line loss.
Further, in one particular embodiment of the present invention, first line 3 is favour aluminum loop line road, the second circuit 4
For favour aluminum loop line road, transformer station 1 is the Hui Li transformer station that 500kv becomes 220kv, switchyard 2 be 220kv gush prosperous switchyard.
Favour aluminum loop line road and favour aluminum loop line road arise from the Hui Li transformer station that 500kv becomes 220kv, and terminate in 220kv gushes prosperous switchyard,
And forming loop-net operation, favour aluminum loop line road and favour aluminum return total track length 7.343km, are set up using common-tower double-return, wherein, ferrum
Tower totally 26 base, steel tube tower 5 base, wire is two jl/g1a-500/45-48/7 shaped steel core aluminum stranded wires, and ground wire is two 24 cores
Opgw wire.Conductor cross-section and structure meet electric power system transmission capacity, and the increasing of conductor cross-section, greatly reduce power transmission line
The loss on road (favour aluminum loop line road and favour aluminum loop line road).In addition, opgw is as the aerial earth wire of transmission line of electricity, can play
Good lightning protection effect, safety is good.
Specifically, in one embodiment of the invention, in Hui Li transformer station, 500kv change 220kv side is divided using double-bus
Section wiring, outlet 18 times.Gush prosperous switchyard two loop line road (first line 3 and the second circuit 4) respectively in Hui Li transformer station 220kv
On the bus (the first bus 11), the bus (the second bus 12).In Hui Li transformer station, 220kv gushes prosperous outlet both sides
It is respectively configured the first optical fiber differential current line protective devices 17 (such as prs-753) and the second optical fiber differential current
As main protection, main back-up protection adopts the first breaker failure to start and automatic to line protective devices 18 (such as prs-753)
Reclosing device 19 (such as prs-723ah) as the nearly back-up protection of Hui Li transformer station and gushes the remote standby of prosperous switchyard and protects
Shield, and using the first default optical fiber (such as dedicated optical fibre core) transmission protection signal, and install the first three-stage phase spacing guarantor
Protection unit 120, the first three-stage ground distance protection device 121 and the first four-part form ground connection zero sequence direction current protective device
122.In addition, two set of first PC bus protection device of configuration 16 (such as bp-2c PC bus protection dress in Hui Li transformer station
Put), the circuit-breaker failure portection equipment of bus and a microcomputer type fault wave recording device to record the fault of electric power system, wherein,
Two set of first PC bus protection device 16 (is arranged on same with the circuit-breaker failure portection equipment of bus same group one side screen
In sealer).
Specifically, in one embodiment of the invention, 220kv gushes 220kv the bus (the 3rd mother of prosperous switchyard
Line 21), the bus (the 4th bus 22) adopt double bus scheme mode, inlet wire 2 times, outlet 10 times.Gush prosperous switchyard peace
Fill 8 × 88000kva rectifier transformer, the electric pressure of rectifier transformer is 225kv/104kv/34kv etc., install 2 ×
50000kva three-phase double winding on-load voltage regulation power transformer, the electric pressure of power transformer is 225 ± 8 × 1.25%/
10.5kv, 10kv adopt single busbar disjunction wiring.
Further, 220kv gushes every go back to 220kv inlet wire both sides of prosperous switchyard and is respectively configured the 3rd optical fiber split-phase difference between current
Moving-wire line protection device 27 (such as prs-753) and 28 liang of sets of the 4th optical fiber differential current line protective devices are (for example
Prs-753) as main protection, main back-up protection adopts the second breaker failure startup and auto recloser 29 (for example
Prs-723ah) as gushing the nearly back-up protection of prosperous switchyard and the remote back-up protection of Hui Li transformer station, and using the second default light
Fine (such as dedicated optical fibre core) transmission protection signal, and install the second three-stage phase distance protection device 220, the second three-stage
Ground distance protection device 221 and the second four-part form ground connection zero sequence direction current protective device 222.In addition, gushing in prosperous switchyard
Two set of second PC bus protection device 26 (such as bp-2c PC bus protection device) of configuration, the breaker failure of bus are protected
, to record the fault of electric power system, wherein, two set of first PC bus protection fills for protection unit and a microcomputer type fault wave recording device
Put 16 and shield (being arranged in same sealer) with the circuit-breaker failure portection equipment of bus same group one side, Fig. 3 is Hui Libian
Power station adopts the schematic diagram of traditional powering mode with gushing prosperous switchyard, and Fig. 4 is adopted by the electric power system for electrolytic aluminium factory
Double circuit power supply pattern schematic diagram.
Referring to Fig. 5 to faults various in the electric power system for electrolytic aluminium factory to the shadow gushing prosperous switchyard ruuning situation
Sound is analyzed, and Fig. 5 is schematic diagram when electric power system for electrolytic aluminium factory breaks down.
(1) line fault
For example, when 220kv favour aluminum returns line fault, when trouble point is k1, now, the second optical fiber differential current line
Line protection device 18 output protection signal disconnects, with quick, the second switch device 15 (262 chopper) that favour goes through transformer substation side, the
Four optical fiber differential current line protective devices 28 output protection signal gushes prosperous switchyard side the 4th derailing switch with quick disconnection
Part 25 (242 chopper), thus isolated fault point k1.
For example, when 220kv favour aluminum returns line fault, and favour goes through second switch device 15 (262 open circuits of transformer substation side
Device) when cannot disconnect, the first the 4th optical fiber differential current line protective devices 28 output protection signal is gushed with quick disconnection
Prosperous switchyard side the 4th switching device 25 (242 chopper), next favour goes through second switch device 15 (262 open circuits of transformer substation side
Device) start female mistake spirit defencive function of at least a set of first PC bus protection device 16 to disconnect the first bus connection switch device
The upper all other chopper of 13 (234 choppers) and the joined bus of 234 choppers (220kv the bus) (include all its
Its first bus connection switch device 13) etc., thus excising fault.Further, if gushing prosperous switchyard side the 4th switching device 25
(242 chopper) cannot disconnect, then 242 choppers start female mistake spirit guarantor of at least a set of second PC bus protection device 26
Protective function is to disconnect the second bus connection switch device 23 (212 chopper) and the joined bus of 212 choppers (220kv the bus)
Upper all other chopper (including all other second bus connection switch device 23) etc., thus isolated fault point.
Similarly, when 220kv favour aluminum returns line fault, the action of isolated fault point is similar to, and below repeats no more.Comprehensive
Upper described, the electric power system for electrolytic aluminium factory of the present invention, when line fault, does not all result in the line of normal operation
Road is powered to faulty line by gushing prosperous switchyard side bus, and does not all result in gush prosperous switchyard and power and cut off.
(2) favour goes through change side bus fault
For example, when favour goes through transformer substation side 220kv the bus-bar fault, when trouble point is k2, now, Hui Li transformer station
At least a set of first PC bus protection device 16 disconnects the first bus connection switch device 13 (234 chopper) and fault bus
(220kv the bus) upper all other chopper (including all other first bus connection switch device 13) etc., thus isolate
Fault bus.Now, gushing prosperous switchyard side the 4th switching device 25 (242 chopper) simply supplies 220kv favour aluminum loop line road empty
Carrying row.
For example, when favour goes through transformer substation side 220kv the bus-bar fault, and favour goes through the second switch device 15 of transformer substation side
When (262 chopper) cannot disconnect, then favour go through transformer substation side the second optical fiber differential current line protective devices 18 remote
Jump order to gushing prosperous switchyard side to disconnect the 4th switching device 25 (242 chopper), thus isolated fault.
Similarly, when favour goes through transformer substation side 220kv the bus-bar fault, the action of isolated fault point is similar to, below
Repeat no more.In sum, the electric power system for electrolytic aluminium factory of the present invention, when favour goes through change side bus fault, all will not be made
Become the normal circuit running to power by gushing prosperous switchyard side bus favour being gone through with change side faulty line, and all do not result in and gush prosperous opening
Close station power supply to cut off.
(3) gush prosperous switchyard side bus fault
For example, when gushing prosperous switchyard side the bus-bar fault, when trouble point is k3, now, gush prosperous switchyard side extremely
Few a set of second PC bus protection device 26 disconnects the second bus connection switch device 23 (212 chopper) and fault bus (the
Section bus) upper all other chopper (including all other second bus connection switch device 23) etc., thus isolated fault bus.This
When, the second switch device 15 (262 chopper) that favour goes through transformer substation side simply supplies 220kv favour aluminum loop line road no-load running.
For example, when gushing prosperous switchyard side the bus-bar fault, and gush the 4th switching device 25 (242 of prosperous switchyard side
Chopper) when cannot disconnect, then the 4th optical fiber differential current line protective devices 28 gushing prosperous switchyard side remote jump life
Make to gushing prosperous switchyard side to disconnect second switch device 15 (262 chopper), thus isolated fault.
Similarly, when gushing prosperous switchyard side 220kv the bus-bar fault, the action of isolated fault point is similar to, below not
Repeat again.In sum, the electric power system for electrolytic aluminium factory of the present invention, when gushing prosperous switchyard side bus fault, all will not
Cause the circuit normally running to power by gushing prosperous switchyard side fault bus, and all do not result in and gush prosperous switchyard and power end
Disconnected.
In sum, no matter there is which kind of fault above, the protection for the electric power system of electrolytic aluminium factory all can meet
Require, and quickly can excise fault it is ensured that switchyard 2 will not provide fault current, Supply Security and reliability to trouble point
Property greatly improves.
The electric power system for electrolytic aluminium factory that the embodiment of the present invention proposes, by each transformer station, corresponding switchyard
And between each transformer station and corresponding switchyard first line in parallel and the second circuit realize electrolytic aluminium factory is carried out double
Loop power supply, breaches the traditional powering mode of electrolytic aluminium factory, and in the first bus and/or the second bus-bar fault, at least
A set of first PC bus protection device disconnects at least one first bus connection switch device to enter to the first bus and the second bus
Row protection, in triple bus-bar and/or four bus-bar faults, at least a set of second PC bus protection device disconnects at least one
Second bus connection switch device to protect to triple bus-bar and the 4th bus, in first line fault, the first optical fiber split-phase
Current differential line protective devices disconnect first switch device, and the 3rd optical fiber differential current line protective devices disconnect
3rd switching device to protect to first line, in the second line fault, protect by the second optical fiber differential current circuit
Protection unit disconnect second switch device, and the 4th optical fiber differential current line protective devices disconnect the 4th switching device with
Second circuit is protected, takes full advantage of high-new Microcomputer Protection technology and advanced and applicable technology, Supply Security and can
Greatly improve by property, and greatly reduce line loss.
In flow chart or here any process described otherwise above or method description are construed as, represent and include
The module of the code of executable instruction of one or more steps for realizing specific logical function or process, fragment or portion
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, including according to involved function by substantially simultaneously in the way of or in the opposite order, carry out perform function, this should be by the present invention
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or here logic described otherwise above and/or step, for example, it is possible to be considered as to use
In the order list of the executable instruction realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (system as computer based system, including processor or other can hold from instruction
Row system, device or equipment instruction fetch the system of execute instruction) use, or with reference to these instruction execution systems, device or set
Standby and use.For the purpose of this specification, " computer-readable medium " can any can be comprised, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress using with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following: has the electricity of one or more wirings
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (ram), read only memory
(rom), erasable edit read-only storage (eprom or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (cdrom).In addition, computer-readable medium can even is that the paper that can print described program thereon or other are suitable
Medium, because edlin, interpretation or if necessary with it can then be entered for example by carrying out optical scanning to paper or other media
His suitable method is processed to electronically obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realizing.For example, if realized with hardware, and the same in another embodiment, can use well known in the art under
Any one of row technology or their combination are realizing: have the logic gates for data signal is realized with logic function
Discrete logic, there is the special IC of suitable combinational logic gate circuit, programmable gate array (pga), scene
Programmable gate array (fpga) etc..
Those skilled in the art are appreciated that to realize all or part step that above-described embodiment method carries
Suddenly the program that can be by completes come the hardware to instruct correlation, and described program can be stored in a kind of computer-readable storage medium
In matter, this program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, can be integrated in a processing module in each functional unit in each embodiment of the present invention it is also possible to
It is that unit is individually physically present it is also possible to two or more units are integrated in a module.Above-mentioned integrated mould
Block both can be to be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.Described integrated module is such as
Fruit using in the form of software function module realize and as independent production marketing or use when it is also possible to be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read only memory, disk or CD etc..
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand and can carry out multiple changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention by claims and its equivalent limits.
Claims (9)
1. a kind of electric power system for electrolytic aluminium factory is it is characterised in that include at least one transformer station, at least one switch
Stand and each described transformer station and corresponding switchyard between first line in parallel and the second circuit, wherein,
Each described transformer station provides the first bus and the second bus, described first bus and the second bus to carry out 220kv and power,
Each described transformer station includes:
At least one first bus connection switch device, first switch device and second switch device, at least one first mother described
Switching device, described first switch device and described second switch device respectively with described first bus and described second bus phase
Even；
At least a set of first PC bus protection device, described at least a set of first PC bus protection device is used for described the
When one bus and/or described second bus-bar fault, disconnect at least one first bus connection switch device described with female to described first
Line and described second bus are protected；
First optical fiber differential current line protective devices and the second optical fiber differential current line protective devices, described
One optical fiber differential current line protective devices be used in described first line fault, disconnect described first switch device with
Described first line is protected, described second optical fiber differential current line protective devices are used in described second circuit
During fault, disconnect described second switch device to protect to described second circuit；
Each described switchyard has triple bus-bar and the 4th bus, and described triple bus-bar and described 4th bus are used for as electrolysis
Aluminium manufacturer powers, and each described switchyard includes:
At least one second bus connection switch device, the 3rd switching device and the 4th switching device, at least one second mother described
Switching device, described 3rd switching device and described 4th switching device respectively with described triple bus-bar and described 4th bus phase
Even, between described first switch device and described 3rd switching device, there is described first line, described second switch device with
Between described 4th switching device, there is described second circuit；
At least a set of second PC bus protection device, described at least a set of second PC bus protection device is used for described the
When triple bus-bar and/or described four bus-bar fault, disconnect at least one second bus connection switch device described with female to the described 3rd
Line and described 4th bus are protected；
3rd optical fiber differential current line protective devices and the 4th optical fiber differential current line protective devices, described
Three optical fiber differential current line protective devices be used in described first line fault, disconnect described 3rd switching device with
Described first line is protected, described 4th optical fiber differential current line protective devices are used in described second circuit
During fault, disconnect described 4th switching device to protect to described second circuit；
Wherein, described first line and described second circuit adopt common-tower double-return to set up.
2. be used for as claimed in claim 1 the electric power system of electrolytic aluminium factory it is characterised in that
When described first switch device cannot disconnect, described 3rd optical fiber differential current line protective devices disconnect described
3rd switching device, and described at least a set of first PC bus protection device disconnection at least one first bus connection switch described
Device；
When described second switch device cannot disconnect, described 4th optical fiber differential current line protective devices disconnect described
4th switching device, and described at least a set of first PC bus protection device disconnection at least one first bus connection switch described
Device；
When described 3rd switching device cannot disconnect, described first optical fiber differential current line protective devices disconnect described
First switch device, and described at least a set of second PC bus protection device disconnection at least one second bus connection switch described
Device；
When described 4th switching device cannot disconnect, described second optical fiber differential current line protective devices disconnect described
Second switch device, and described at least a set of second PC bus protection device disconnection at least one second bus connection switch described
Device.
3. it is used for as claimed in claim 2 the electric power system of electrolytic aluminium factory it is characterised in that at least one first mother described
Switching device, at least one second bus connection switch device described, described first switch device, described second switch device, described
3rd switching device and described 4th switching device are chopper.
4. it is used for the electric power system of electrolytic aluminium factory as claimed in claim 1 it is characterised in that each described transformer station also wraps
Include:
First breaker failure starts and auto recloser, and described first breaker failure starts and auto recloser
Nearly back-up protection as described transformer station and the remote back-up protection of corresponding switchyard.
5. it is used for the electric power system of electrolytic aluminium factory as claimed in claim 4 it is characterised in that each described transformer station also wraps
Include: the first three-stage phase distance protection device, the first three-stage ground distance protection device and the first four-part form ground connection zero sequence
Directional current protection.
6. it is used for the electric power system of electrolytic aluminium factory as claimed in claim 4 it is characterised in that each described switchyard also wraps
Include:
Second breaker failure starts and auto recloser, and described second breaker failure starts and auto recloser
Nearly back-up protection as described switchyard and the remote back-up protection of corresponding transformer station.
7. it is used for the electric power system of electrolytic aluminium factory as claimed in claim 6 it is characterised in that each described switchyard also includes
Second three-stage phase distance protection device, the second three-stage ground distance protection device and the second four-part form ground connection zero sequence direction
Current protective device.
8. be used for as claimed in claim 6 the electric power system of electrolytic aluminium factory it is characterised in that
Described at least a set of first PC bus protection device, described first optical fiber differential current line protective devices, institute
State the second optical fiber differential current line protective devices and described first breaker failure starts and auto recloser
Protection signal is transmitted by the first default optical fiber；
Described at least a set of second PC bus protection device, described 3rd optical fiber differential current line protective devices, institute
State the 4th optical fiber differential current line protective devices and described second breaker failure starts and auto recloser
Protection signal is transmitted by the second default optical fiber.
9. be used for as claimed in claim 1 the electric power system of electrolytic aluminium factory it is characterised in that at least one transformer station described and
Communication modes between at least one switchyard described are double optical-fibre communications.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510016138.5A CN104505829B (en) | 2015-01-13 | 2015-01-13 | Power supply system for electrolytic aluminum plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510016138.5A CN104505829B (en) | 2015-01-13 | 2015-01-13 | Power supply system for electrolytic aluminum plant |
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| Publication Number | Publication Date |
|---|---|
| CN104505829A CN104505829A (en) | 2015-04-08 |
| CN104505829B true CN104505829B (en) | 2017-01-18 |
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| CN104836332A (en) * | 2015-04-29 | 2015-08-12 | 酒泉钢铁(集团)有限责任公司 | Parallel power supplying method of electrolytic aluminum different-power-supply-point direct-current sides |
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| JP5441786B2 (en) * | 2010-03-29 | 2014-03-12 | 三菱電機株式会社 | Control device for power system stabilizer |
| CN103117537B (en) * | 2013-03-13 | 2015-01-21 | 长园深瑞继保自动化有限公司 | Power distribution network area protection method and system |
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