CN105932769A - Power supply seamless switching device and method of electrified railway traction substation - Google Patents
Power supply seamless switching device and method of electrified railway traction substation Download PDFInfo
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- CN105932769A CN105932769A CN201610533080.6A CN201610533080A CN105932769A CN 105932769 A CN105932769 A CN 105932769A CN 201610533080 A CN201610533080 A CN 201610533080A CN 105932769 A CN105932769 A CN 105932769A
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- power supply
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/067—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems using multi-primary transformers, e.g. transformer having one primary for each AC energy source and a secondary for the loads
Abstract
The invention discloses a power supply seamless switching device and method of an electrified railway traction substation. Four paths of voltages, namely two-phase voltages of buses a and b of a contact network and voltages of a bus I and a bus II of a power supply, and four switching position signals, namely switches 201A and 201B of a low-voltage side of a main transformer 1B and switches 202A and 202B of a low-voltage side of a main transformer 2B are accessed to the switching device. During application, the current running mode of the traction substation is identified according to access quantity, automatic charging is achieved to prepare for switching if the running mode is normal, and discharging is performed to lock a switching function if the running mode is abnormal; three switching modes of parallel automatic switching, parallel semi-automatic switching and series switching can be performed; an optimal switching-on mode can be selected according to a real-time relation between the bus voltages of the power supply and the bus voltages of the contact network during switching on; and six modes of parallel rapid switching, rapid switching, same-phase lead phase angle switching, same-phase lead time switching, residual voltage switching and long delay switching can be performed, and uninterruptible power supply switching of two power supplies of the electrified railway traction substation can be achieved.
Description
Technical field
The present invention relates to electrified railway power supply technical field, particularly a kind of electric railway traction transformer station power supply seamless switching
Apparatus and method.
Background technology
The development of China's electric railway cause at present is advanced by leaps and bounds, under the background of country's large-scale basis Facilities Construction, and country
The large quantities of electric railway projects of investment construction.Electric locomotive needs the traction substation of Along Railway to power, and needs to build greatly
The traction substation of amount, traction substation electric pressure uses 110kV or 110kV.For ensureing power supply reliability, electrified
Rail traction station uses twice incoming powers, by two main transformer configurations in transformer station, is that single transformer is to contact time properly functioning
Net power supply, two main transformers are the most standby.
When the switchgear of transformer itself and both sides needs maintenance or rotation operation manually need to switch over main transformer, can only take
Full institute power failure back brake mode, affects railway transportation order.Can only take under existence conditions to put forward the monthly construction plan of report, take full institute
Power failure mode carries out the operation of falling main transformer.The maintenance skylight at general iron station need to one month earlier be applied for, and monthly can only apply for once, often
Secondary only dozens of minutes.Power failure grid switching operation is completed in this dozens of minutes.This mode can there is problems in that
1, depending on repair schedule cashes basis of time contact net " skylight ", dumb, some Traction Stations " skylight " arrangement of time
In morning, affect the normal work and rest of maintainer；
2, being affected by factors such as weather, maintenance " skylight " can be cancelled temporarily, can only apply for overhauling in " skylight " next time, maintenance
Personnel sometimes come and go maintenance task several times and cannot complete.The problem of the difficulty of falling main transformer affects utility network company the most often
110 (220) kV line maintenances, sometimes directly initiate mains side protection and carry out power supply switching by force, bring greatly to traction power supply
Potential safety hazard；
3, it is limited by Comprehensive maintenance window and only has the time restriction of dozens of minutes, if the breaking down every cutter of stand-by power supply, Ke Nengwu
Method is switched to stand-by power supply at short notice, affects railway normal power supply.
Summary of the invention
It is an object of the present invention to provide a kind of electric railway traction transformer station power supply seamless handover method, solve to draw change at present
Problem present in the main transformer back brake operation of power station, is not required to operator on duty and completes loaded down with trivial details manual back brake operation, it is achieved dock during back brake
The uninterrupted power supply touched net, to reduce the interference to railway transportation, provides convenient to traction substation overhaul of the equipments simultaneously, improves
Operating efficiency.
The technical scheme that the present invention takes is particularly as follows: a kind of electric railway traction transformer station power supply seamless switching device, electrified
Rail traction station uses twice incoming powers, and transformer station includes the most standby main transformer 1B and main transformer 2B, main transformer 1B and main transformer 2B
High-pressure side connect bus I and bus II respectively, low-pressure side is respectively by main transformer switch contact group 201A/201B and 202A/202B
Connect Traction Station contact net a phase and b phase bus；
Switching device includes voltage acquisition unit, switch state collecting unit, analysis and processing unit, switch control unit and people
Machine interface unit, wherein:
Voltage acquisition unit gathers bus I, bus II, contact net bus a phase and the voltage signal of contact net bus b phase respectively,
And transmit to analysis and processing unit；Switch state collecting unit gather respectively main transformer switch contact 201A, 201B, 202A and
The switch position signal of 202B, and transmit to analysis and processing unit；User is sent to analysis and processing unit by human-machine interface unit
Switching command；
Analysis and processing unit, according to the switching command received, voltage signal and switch position signal, passes through switch control unit
Control main transformer switch contact group 201A/201B and 202A/202B to switch between conjunction position and point position, thus realize traction and become
Power station main transformer and the switching of power supply.
Further, heretofore described switching command includes switching enabling signal and transfer sequence signal, transfer sequence signal bag
Include series connection switching command and switching command in parallel.Analysis and processing unit starts main transformer switching flow according to switching enabling signal, then
According to the corresponding transfer sequence of transfer sequence signal behavior.
Attachment structure based on above-mentioned switching device Yu traction substation electrical network, the present invention also provides for a kind of electric railway traction and becomes
Plant power source seamless handover method, comprises the following steps:
Step one, gathers the voltage letter of transformer station's power source bus I and the voltage signal of bus II, contact net bus a phase and b phase
Number, and main transformer switch contact group 201A/201B and the switch position signal of 202A/202B；
Step 2, based on the live signal collected, calculate the pressure reduction between contact net busbar voltage and stand-by power supply busbar voltage,
Angular difference and frequency difference；
Step 3, according to the live signal collected, it is judged that the running status of Traction Station transformer substation system be whether charging complete or
Person occurs for electric discharge；Wherein,
When 3.1 needs are switched to main transformer 2B by main transformer 1B, charge condition is: 1) main transformer 1B to 2B switching starts input；2)
Contact net bus three-phase has pressure；3) 201A and 201B is all closing position and 202A and 202B all in a point position；4) start without switching
Signal；Conditions above is simultaneously satisfied then have been charged to；
Discharging condition is: 1) power source bus II was unsatisfactory for the press strip part duration more than 15 seconds；2) 202A and 202B is closing
Position；3) hand jumps 201A and 201B；4) in 201A and 201B, 202A and 202B, the arbitrary group of position of the switch is abnormal；Above bar
In part, any one condition meets generation of then discharging；
When 3.2 needs are switched to main transformer 1B by main transformer 2B, charge condition is: 1) main transformer 2B to 1B switching starts input；2)
Contact net bus three-phase has pressure；3) 201A and 201B is all closing position in point position and 202A and 202B；4) start without switching
Signal；Conditions above is simultaneously satisfied then have been charged to；
Discharging condition is: 1) power source bus I was unsatisfactory for the press strip part duration more than 15 seconds；2) 201A and 201B closes position；
3) hand jumps 202A and 202B；4) in 201A and 201B, 202A and 202B, the arbitrary group of position of the switch is abnormal；In conditions above
Any one condition meets generation of then discharging；
If the running status of Traction Station transformer substation system is charging complete, then proceed to step 4；If the fortune of Traction Station transformer substation system
Row state occurs for electric discharge, then locking main transformer handoff functionality；
In above-mentioned steps 3.1 and 3.2, described contact net bus three-phase has pressure i.e. voltage minimum more than there being compression set value；Power supply is female
Line was unsatisfactory for the press strip part duration more than 15 seconds, and i.e. voltage max is less than having the compression set value time more than 15 seconds；Above-mentioned have
Compression set value can preset, as being set by the user by man-machine interface or directly being set, for prior art by program；
Whether the present invention is charging complete or when occurring for electric discharge in the running status judging Traction Station transformer substation system, also can be with
Time determine whether that " other locking switching condition " meets, in addition to the rail traction transformer substation system composition i.e. mentioned except the present invention,
Whether having other signal for locking handoff functionality, this is prior art, as user can open by arranging single locking switching
Closing, for locking handoff functionality, the locking being separately provided this switching switch is also carried out position of the switch letter when application by the present invention
Number obtain, thus determine whether other locking switching condition, be discharge condition if any then system, fill as the most then met system
One of electricity condition；
Step 4, it may be judged whether have switching enabling signal, if having, continues to judge the switching of main transformer switch according to transfer sequence signal
Order is to switch for series connection switching or parallel connection, if series connection switching then goes to step 5, if in parallel switching then goes to step 6；
Step 5, carries out series connection and switches: the main transformer switch that first tripping work at present power supply is corresponding, then judge that combined floodgate condition is
No meet be switched fast condition, being switched fast condition if meeting, utilizing fast transfer mode main transformer corresponding to stand-by power supply that close to open
Close；If being unsatisfactory for being switched fast condition, continuing to determine whether to meet same-phase switching condition, if meeting, utilizing same-phase to switch
Mode is closed main transformer switch corresponding to stand-by power supply；If being unsatisfactory for same-phase switching condition, continue to determine whether to meet remnant voltage switch
Condition, if meeting, utilizes remnant voltage switch mode to close main transformer switch corresponding to stand-by power supply；If being unsatisfactory for, long delay is utilized to cut
The mode of changing is closed main transformer switch corresponding to stand-by power supply；Go to step 7；
In above-mentioned series connection switching, be switched fast, same-phase switching, remnant voltage switch and delayed transfer are respectively prior art,
The switching condition of its correspondence is combined floodgate condition；
Step 6, carries out switching in parallel: first determining whether whether combined floodgate condition meets and be switched fast condition, if meeting, utilizing quickly
Switching mode is closed main transformer switch corresponding to stand-by power supply, the main transformer switch that then tripping work at present power supply is corresponding；Go to step
Seven；
Step 7, switching completes, and terminates.
Further, in the step 5 of said method of the present invention, being switched fast condition in series connection switching is: contact net busbar voltage
With the frequency difference between stand-by power supply busbar voltage and differing, it is respectively smaller than and is switched fast frequency difference, be switched fast difference；
The span being switched fast frequency difference is 0.1～2.0Hz, and the span being switched fast difference is 0.5～60 degree, respectively
Can determine according to concrete applied environment, for prior art.
Same-phase switching includes that the switching of same-phase angle of phase lead and same-phase exceeding time switch, wherein same-phase angle of phase lead switching
Condition is: the frequency difference between contact net busbar voltage and stand-by power supply busbar voltage switches frequency difference, and standby main transformer less than same-phase
The angular difference of switch both sides is in this limits；Same-phase switching frequency difference span is 0.1～5.0Hz, can be according to concrete application
Determine, as the present invention gives tacit consent to 5Hz；The phase angle of the angular difference the most standby main transformer high side bus voltage of standby main transformer switch both sides with connect
Difference between the phase angle of net-fault busbar voltage；This limits of angular difference may be configured as-120～-30 degree.
Same-phase exceeding time switching condition is: according to the frequency difference between contact net busbar voltage and stand-by power supply busbar voltage, frequently
Rate slippage and switch closing circuit definite value actuation time, estimate out phase angle difference, when contact net busbar voltage and stand-by power supply bus electricity
Angular difference between pressure will arrive the phase angle difference estimated, and frequency difference switches frequency difference less than same-phase simultaneously, then arrive at angular difference and estimate phase
Order of closing a floodgate is sent out before angular difference；
Phase angle difference computing formula during the switching of same-phase exceeding time is:
Wherein: d Φ is phase angle difference；DFR is frequency difference；D (dFR)/dt is frequency difference slippage；tdqFor closing circuit actuation time,
Time and the intrinsic closing time of main transformer switch of reclosing command is sent including switching device.
Remnant voltage switch condition is: contact net busbar voltage is less than remnant voltage switch voltage magnitude definite value.Described remnant voltage switch voltage magnitude
Definite value is the contact net rated voltage of 20%-40%.When busbar voltage drops to certain permissible value, the transient state produced after switching
Process will not produce and have a strong impact on, and now can close stand-by power supply, need not judge phase angle or difference on the frequency again.
When putting into delayed transfer, after switching starts, after the delay time set, switching device sends reclosing command, sends out
Pressure reduction, frequency difference and difference are not judged during reclosing command.Because through setting long delay after, before three kinds of switching modes
The most not sending auxiliaries-supply circuit-breaker closing pulse, bus residual voltage has decayed to abampere total head, delayed transfer conduct the most
The ungratified General Logistics Department of above switching condition is standby.The delay time setting range that above-mentioned delayed transfer is corresponding is 0.5～10 second.
In the step 6 of said method of the present invention, being switched fast condition in switching in parallel is: contact net busbar voltage and stand-by power supply
Pressure reduction, frequency difference and difference between busbar voltage, is respectively smaller than normal in parallel switching pressure reduction, normal switching frequency difference in parallel and normal
Switching difference in parallel.The span of normal switching pressure reduction definite value in parallel is 0～20%, the value of normal switching frequency difference definite value in parallel
Scope is 0.02～0.5Hz, and the span of normal switching difference definite value in parallel is 0.5～20 degree, can set the most as required
Fixed.
Beneficial effect
Utilize the switching device of the present invention and method can realize the handoff functionality of two main transformer low-pressure side two branch switches, have two kinds of sides
Formula: one is Backup Power Switch of first closing, then tripping working power switch；One is first tripping working power switch, then closes
Upper Backup Power Switch, regardless of which kind of mode, when switch closes a floodgate, is both needed to judge the amplitude of both sides voltage, phase and frequency, really
Guarantor can realize continual seamless switching, it is not necessary to power failure of entirely standing, moreover it is possible to when ensureing to close a floodgate, dash current is less, is not result in
Main transformer protection action, completes the uninterrupted power supply handoff functionality of traction power supply.
Compared with prior art, the present invention changes the back brake mode that traditional traction substation is traditional, and switching need not station entirely and stops
Electricity, completes stand-by power supply isolation switch combined floodgate work before the handover, has time enough to tackle situation about can not normally close a floodgate every cutter,
Seamless switching device of the present invention is finally used to complete the switching of switch.Due to the seamless switching technique used, it is ensured that the most reliable
Power supply, does not affect the properly functioning of electric locomotive, it is not necessary to gone power supply to switch, during maintenance in specific " skylight " time
Between can flexible arrangement, provide conveniently to traction substation overhaul of the equipments, while improve operating efficiency, ensure further
Power supply reliability and security, economic benefit is the most considerable.
Accompanying drawing explanation
The typical operation modes one of Tu1Shi electric railway traction transformer station；
The typical operation modes two of Tu2Shi electric railway traction transformer station；
Fig. 3 is the power supply seamless switching procedure schematic diagram of the inventive method；
Fig. 4 is system charging and discharging condition schematic diagram in the inventive method.
Detailed description of the invention
Further describe below in conjunction with the drawings and specific embodiments.
The application foundation of the present invention is: electric railway traction station uses twice incoming powers, and transformer station includes the most standby master
Becoming 1B and main transformer 2B, the high-pressure side of main transformer 1B and main transformer 2B connects bus I and bus II respectively, and low-pressure side is respectively by main
Become make and break contact group 201A/201B and 202A/202B connects Traction Station contact net a phase and b phase bus；Such as Fig. 1 and Fig. 2,
110KV power source bus I and bus II, by main transformer 1B and main transformer 2B, provide power supply for contact net bus.
The switching device of the present invention includes voltage acquisition unit, switch state collecting unit, analysis and processing unit, switching control
Unit and human-machine interface unit, wherein:
Voltage acquisition unit gathers bus I, bus II, contact net bus a phase and the voltage signal of contact net bus b phase respectively,
And transmit to analysis and processing unit；Switch state collecting unit gather respectively main transformer switch contact 201A, 201B, 202A and
The switch position signal of 202B, and transmit to analysis and processing unit；User is sent to analysis and processing unit by human-machine interface unit
Switching command；
Analysis and processing unit, according to the switching command received, voltage signal and switch position signal, passes through switch control unit
Control main transformer switch contact group 201A/201B and 202A/202B to switch between conjunction position and point position, thus realize traction and become
Power station main transformer and the switching of power supply.
Above-mentioned switching command includes switching enabling signal and transfer sequence signal, and transfer sequence signal includes connecting switching command and also
Connection switching command.Analysis and processing unit starts main transformer switching flow according to switching enabling signal, then selects according to transfer sequence signal
Select corresponding transfer sequence.The button of corresponding different switching command can be respectively provided with, to facilitate staff to carry out in man-machine interface
Operation, button output linking parsing processing unit, to obtain switching command signal.
Voltage acquisition unit, switch state collecting unit are all prior art, and analysis and processing unit uses existing processor chips,
Switch control unit can be realized by relay form, will access in the control loop switched by 8 groups of different relays, switch
Control loop and include trip(ping) circuit and closing circuit, particularly as follows: 201A switch trip loop, 201A switch closing circuit, 201B
Switch trip loop, 201B switch closing circuit, 202A switch trip loop, 202A switch closing circuit, 202B switch
Trip(ping) circuit and 202B switch closing circuit, and the physical circuit form of above-mentioned each trip(ping) circuit and closing circuit is prior art.
Embodiment
With reference to Fig. 1 and Fig. 2, the present invention passes through a seamless switching device, accesses in electric railway traction station and transformer station
4 road voltages, including: 27.5kV bus a, bus b two phase voltage, 110kV bus I voltage one tunnel, 110kV bus II
Voltage one tunnel；4 way switch position signallings: main transformer 1B low-pressure side 201A, 201B switch normally closed auxiliary contact, main transformer 2B low pressure
Side 202A, 202B switch normally closed auxiliary contact.Can be applied not only to Fig. 1 method of operation, can apply to Fig. 2 simultaneously and run
Mode, two kinds of method of operation symmetries, it is achieved the mutual switching of two kinds of methods of operation.
The present invention has the function automatically identifying the current method of operation of traction substation, once recognizes certain method of operation, i.e. certainly
Dynamic charging, carries out early-stage preparations for switching, if the method for operation is abnormal, then discharges, locking handoff functionality.The so-called method of operation
I.e. it is used for a noun of the distribution situation of the state of reaction system breaker in middle, voltage, electric current.
With reference to shown in Fig. 3, present invention attachment structure based on above-mentioned switching device and traction substation electrical network, electric railway
Traction substation power supply seamless handover method, comprises the following steps:
Step one, gathers the voltage letter of transformer station's power source bus I and the voltage signal of bus II, contact net bus a phase and b phase
Number, and main transformer switch contact group 201A/201B and the switch position signal of 202A/202B.
Step 2, based on the live signal collected, calculate the pressure reduction between contact net busbar voltage and stand-by power supply busbar voltage,
Angular difference and frequency difference.
Step 3, according to the live signal collected, it is judged that the running status of Traction Station transformer substation system be whether charging complete or
Person occurs for electric discharge；The condition that the present system method of operation is charging and discharging is respectively illustrated with reference to Fig. 4:
When 3.1 needs are switched to main transformer 2B by main transformer 1B, charge condition is: 1) main transformer 1B to 2B switching starts input；2)
Contact net bus three-phase has pressure；3) 201A and 201B is all closing position and 202A and 202B all in a point position；4) start without switching
Signal；Conditions above is simultaneously satisfied then have been charged to；
Discharging condition is: 1) power source bus II was unsatisfactory for the press strip part duration more than 15 seconds；2) 202A and 202B is closing
Position；3) hand jumps 201A and 201B；4) in 201A and 201B, 202A and 202B, the arbitrary group of position of the switch is abnormal；Above bar
In part, any one condition meets generation of then discharging；
When 3.2 needs are switched to main transformer 1B by main transformer 2B, charge condition is: 1) main transformer 2B to 1B switching starts input；2)
Contact net bus three-phase has pressure；3) 201A and 201B is all closing position in point position and 202A and 202B；4) start without switching
Signal；Conditions above is simultaneously satisfied then have been charged to；
Discharging condition is: 1) power source bus I was unsatisfactory for the press strip part duration more than 15 seconds；2) 201A and 201B closes position；
3) hand jumps 202A and 202B；4) in 201A and 201B, 202A and 202B, the arbitrary group of position of the switch is abnormal；In conditions above
Any one condition meets generation of then discharging；
If the running status of Traction Station transformer substation system is charging complete, then proceed to step 4；If the fortune of Traction Station transformer substation system
Row state occurs for electric discharge, then locking main transformer handoff functionality；
In above-mentioned steps 3.1 and 3.2, described contact net bus three-phase has pressure i.e. voltage minimum more than there being compression set value；Power supply is female
Line was unsatisfactory for the press strip part duration more than 15 seconds, and i.e. voltage max is less than having the compression set value time more than 15 seconds；Above-mentioned have
Compression set value can preset, as being set by the user by man-machine interface or directly being set, for prior art by program；
Whether the present invention is charging complete or when occurring for electric discharge in the running status judging Traction Station transformer substation system, also can be with
Time determine whether that " other locking switching condition " meets, in addition to the rail traction transformer substation system composition i.e. mentioned except the present invention,
Whether having other signal for locking handoff functionality, this is prior art, as user can open by arranging single locking switching
Closing, for locking handoff functionality, the locking being separately provided this switching switch is also carried out position of the switch letter when application by the present invention
Number obtain, thus determine whether other locking switching condition, be discharge condition if any then system, fill as the most then met system
One of electricity condition.
Step 4, it may be judged whether have switching enabling signal, if having, continues to judge the switching of main transformer switch according to transfer sequence signal
Order is to switch for series connection switching or parallel connection, if series connection switching then goes to step 5, if in parallel switching then goes to step 6；
Step 5, carries out series connection and switches: the main transformer switch that first tripping work at present power supply is corresponding, then judge that combined floodgate condition is
No meet be switched fast condition, being switched fast condition if meeting, utilizing fast transfer mode main transformer corresponding to stand-by power supply that close to open
Close；If being unsatisfactory for being switched fast condition, continuing to determine whether to meet same-phase switching condition, if meeting, utilizing same-phase to switch
Mode is closed main transformer switch corresponding to stand-by power supply；If being unsatisfactory for same-phase switching condition, continue to determine whether to meet remnant voltage switch
Condition, if meeting, utilizes remnant voltage switch mode to close main transformer switch corresponding to stand-by power supply；If being unsatisfactory for, long delay is utilized to cut
The mode of changing is closed main transformer switch corresponding to stand-by power supply；Go to step 7；
In above-mentioned series connection switching, express delivery switching, same-phase switching, remnant voltage switch and delayed transfer are respectively prior art,
The switching condition of its correspondence is combined floodgate condition；
Step 6, carries out switching in parallel: first determining whether whether combined floodgate condition meets and be switched fast condition, if meeting, utilizing quickly
Switching mode is closed main transformer switch corresponding to stand-by power supply, the main transformer switch that then tripping work at present power supply is corresponding；Go to step
Seven；
Step 7, switching completes, and terminates.
As it is shown on figure 3, the present invention relates to 3 kinds of handover operation modes, according to the priority operation order of switch, parallel connection is had automatically to cut
Change, semi-automatic switching in parallel, series connection switching three kinds of modes.
Automatic switchover in parallel: according to the typical operation modes of Fig. 1, manually boots switching and selects transfer sequence, and analyzing and processing is single
Unit recognizes sequence of movement and automatically switches for parallel connection, utilizes 27.5kV busbar voltage and 110kV bus II voltage to calculate, sentences
Being clipped to after the condition that parallel connection is switched fast meets, 202A and 202B that close switchs, after " normal shunt tripping time delay ",
Tripping 201A and 201B switchs.If in this section of time delay, 202A and 202B just closed switchs by tripping, the most dynamic
Make to jump the work of 201A and 201B operating switch.
Semi-automatic switching in parallel: the typical operation modes of 1 with reference to the accompanying drawings, manually boots switching and selects transfer sequence, and device is known
Being clipped to sequence of movement is semi-automatic switching in parallel, utilizes 27.5kV busbar voltage and 110kV bus II voltage, it determines in parallel fast
After the condition of speed switching meets, 202A and 202B that close switchs, and the work of tripping 201A and 201B switch is complete by manual operation
Become.If within the time set, operating personnel tripping 201A and 201B not yet switchs, and device will send alarm signal, in order to avoid
The two long-term paired runnings of power supply.
Series connection switching: the typical operation modes of 1 with reference to the accompanying drawings, manually boots switching and selects transfer sequence, device to recognize dynamic
Work order is series connection switching mode, utilizes 27.5kV busbar voltage and 110kV bus II voltage, the with reference to the accompanying drawings flow process of 4, first
Tripping 201A and 201B switchs, and confirms after tripping, successively carries out according to priority being switched fast, same-phase angle of phase lead is cut
Change, the switching of same-phase exceeding time, remnant voltage switch, delayed transfer function differentiate, after meeting switching condition, close 202A and
202B switchs.
For the typical operation modes of accompanying drawing 2, the most symmetrical switching.
The present invention relates to 6 closing criterions, it may be assumed that parallel connection is switched fast, is switched fast, the switching of same-phase angle of phase lead, homophase
Position exceeding time switching, remnant voltage switch, six kinds of modes of delayed transfer；The present invention is according to the different situations of busbar voltage, search
Most preferably close a floodgate a little.
With main transformer 1B be switched to main transformer 2B illustrate 5 kinds of combined floodgate decision conditions:
Parallel connection is switched fast: pressure reduction, frequency difference between 27.5kV busbar voltage with 110kV bus II voltage and differ respectively
During less than normal switching pressure reduction in parallel, normal switching frequency difference in parallel and normal switching difference in parallel, parallel connection is switched fast condition and meets.
It is switched fast: frequency difference between 27.5kV busbar voltage with 110kV bus II voltage and differing less than being switched fast frequency
Differing from, be switched fast difference, the condition that is switched fast meets.
Same-phase angle of phase lead switches: the frequency difference between 27.5kV busbar voltage and 110kV bus II voltage is less than same-phase
During switching frequency difference, as long as the angular difference of switch both sides is in this limits, device then sends out combined floodgate order.
Same-phase exceeding time switches: sliding according to the frequency difference between 27.5kV busbar voltage and 110kV bus II voltage and frequency
Difference, and switch closing circuit definite value actuation time, estimate out phase angle difference.Angular difference between two busbar voltages arrives soon to be estimated
During phase angle difference, frequency difference meets less than same-phase switching frequency difference simultaneously, sends out combined floodgate order in advance.So through the combined floodgate of switch reality
After time delay, the moment closed a switch guarantee angular difference close to 0, now dash current is less, same-phase exceeding time switch
The phase angle difference equation below of criterion calculates:
Wherein: dFR is frequency difference；D Φ is phase angle difference；D (dFR)/dt is frequency difference slippage；tdqFor closing circuit actuation time, bag
Include the Outlet time of switching device+switch intrinsic closing time.
Remnant voltage switch: after switching device starts, when 27.5kV busbar voltage is less than remnant voltage switch voltage magnitude definite value, residual voltage
Switching condition meets.
Delayed transfer: when delayed transfer puts into, after switching starts, after the delay time that this definite value sets, dress
Put to send out and close order.Send out and pressure reduction, frequency difference and difference are not judged when closing order.This switching is unsuccessful as above switching condition
The General Logistics Department standby.
The above is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
On the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and deformation, these improve and deformation also should be regarded as
Protection scope of the present invention.
Claims (7)
1. an electric railway traction transformer station power supply seamless switching device, a kind of electric railway traction transformer station power supply is seamless
Switching device, electric railway traction station uses twice incoming powers, and transformer station includes the most standby main transformer 1B and main transformer 2B,
The high-pressure side of main transformer 1B and main transformer 2B connects bus I and bus II respectively, and low-pressure side is respectively by main transformer switch contact group
201A/201B and 202A/202B connects Traction Station contact net a phase and b phase bus；It is characterized in that,
Switching device includes voltage acquisition unit, switch state collecting unit, analysis and processing unit, switch control unit and people
Machine interface unit, wherein:
Voltage acquisition unit gathers bus I, bus II, contact net bus a phase and the voltage signal of contact net bus b phase respectively,
And transmit to analysis and processing unit；Switch state collecting unit gather respectively main transformer switch contact 201A, 201B, 202A and
The switch position signal of 202B, and transmit to analysis and processing unit；User is sent to analysis and processing unit by human-machine interface unit
Switching command；
Analysis and processing unit, according to the switching command received, voltage signal and switch position signal, passes through switch control unit
Control main transformer switch contact group 201A/201B and 202A/202B to switch between conjunction position and point position, thus realize traction and become
Power station main transformer and the switching of power supply.
Electric railway traction transformer station the most according to claim 1 power supply seamless switching device, is characterized in that, described in cut
Changing instruction to include switching enabling signal and transfer sequence signal, transfer sequence signal includes connect switching command and switching command in parallel；
Analysis and processing unit starts main transformer switching flow according to switching enabling signal, then corresponding according to transfer sequence signal behavior
Transfer sequence.
3. changing method based on the electric railway traction transformer station power supply seamless switching device described in claim 1 to 2, its
Feature is, comprises the following steps:
Step one, gathers the voltage letter of transformer station's power source bus I and the voltage signal of bus II, contact net bus a phase and b phase
Number, and main transformer switch contact group 201A/201B and the switch position signal of 202A/202B；
Step 2, based on the live signal collected, calculate the pressure reduction between contact net busbar voltage and stand-by power supply busbar voltage,
Angular difference and frequency difference；
Step 3, according to the live signal collected, it is judged that the running status of Traction Station transformer substation system be whether charging complete or
Person occurs for electric discharge；Wherein,
When 3.1 needs are switched to main transformer 2B by main transformer 1B, charge condition is: 1) main transformer 1B to 2B switching starts input；2)
Contact net bus three-phase has pressure；3) 201A and 201B is all closing position and 202A and 202B all in a point position；4) start without switching
Signal；Conditions above is simultaneously satisfied then have been charged to；
Discharging condition is: 1) power source bus II was unsatisfactory for the press strip part duration more than 15 seconds；2) 202A and 202B is closing
Position；3) hand jumps 201A and 201B；4) in 201A and 201B, 202A and 202B, the arbitrary group of position of the switch is abnormal；Above bar
In part, any one condition meets generation of then discharging；
When 3.2 needs are switched to main transformer 1B by main transformer 2B, charge condition is: 1) main transformer 2B to 1B switching starts input；2)
Contact net bus three-phase has pressure；3) 201A and 201B is all closing position in point position and 202A and 202B；4) start without switching
Signal；Conditions above is simultaneously satisfied then have been charged to；
Discharging condition is: 1) power source bus I was unsatisfactory for the press strip part duration more than 15 seconds；2) 201A and 201B closes position；
3) hand jumps 202A and 202B；4) in 201A and 201B, 202A and 202B, the arbitrary group of position of the switch is abnormal；In conditions above
Any one condition meets generation of then discharging；
If the running status of Traction Station transformer substation system is charging complete, then proceed to step 4；If the fortune of Traction Station transformer substation system
Row state occurs for electric discharge, then locking main transformer handoff functionality；
Step 4, it may be judged whether have switching enabling signal, if having, continues to judge the switching of main transformer switch according to transfer sequence signal
Order is to switch for series connection switching or parallel connection, if series connection switching then goes to step 5, if in parallel switching then goes to step 6；
Step 5, carries out series connection and switches: the main transformer switch that first tripping work at present power supply is corresponding, then judge that combined floodgate condition is
No meet be switched fast condition, being switched fast condition if meeting, utilizing fast transfer mode main transformer corresponding to stand-by power supply that close to open
Close；If being unsatisfactory for being switched fast condition, continuing to determine whether to meet same-phase switching condition, if meeting, utilizing same-phase to switch
Mode is closed main transformer switch corresponding to stand-by power supply；If being unsatisfactory for same-phase switching condition, continue to determine whether to meet remnant voltage switch
Condition, if meeting, utilizes remnant voltage switch mode to close main transformer switch corresponding to stand-by power supply；If being unsatisfactory for, long delay is utilized to cut
The mode of changing is closed main transformer switch corresponding to stand-by power supply；Go to step 7；
Step 6, carries out switching in parallel: first determining whether whether combined floodgate condition meets and be switched fast condition, if meeting, utilizing quickly
Switching mode is closed main transformer switch corresponding to stand-by power supply, the main transformer switch that then tripping work at present power supply is corresponding；Go to step
Seven；
Step 7, switching completes, and terminates.
Method the most according to claim 3, is characterized in that, in step 5, being switched fast condition in series connection switching is: connect
Frequency difference between net-fault busbar voltage with stand-by power supply busbar voltage and differing, is respectively smaller than and is switched fast frequency difference, is switched fast phase
Difference.
Method the most according to claim 3, is characterized in that, in step 5, in series connection switching, same-phase switching includes same
The switching contract phase place exceeding time switching of phase place angle of phase lead, wherein same-phase angle of phase lead switching condition is: contact net bus electricity
Frequency difference between pressure and stand-by power supply busbar voltage switches frequency difference less than same-phase, and the angular difference of standby main transformer switch both sides is fixed at this
In the range of value；
Same-phase exceeding time switching condition is: according to the frequency difference between contact net busbar voltage and stand-by power supply busbar voltage, frequently
Rate slippage and switch closing circuit definite value actuation time, estimate out phase angle difference, when contact net busbar voltage and stand-by power supply bus electricity
Angular difference between pressure will arrive the phase angle difference estimated, and frequency difference switches frequency difference less than same-phase simultaneously, then arrive at angular difference and estimate phase
Order of closing a floodgate is sent out before angular difference；
Phase angle difference computing formula during the switching of same-phase exceeding time is:
Wherein: d Φ is phase angle difference；DFR is frequency difference；D (dFR)/dt is frequency difference slippage；tdqFor closing circuit actuation time,
Time and the intrinsic closing time of main transformer switch of reclosing command is sent including switching device.
Method the most according to claim 2, is characterized in that, remnant voltage switch condition is: contact net busbar voltage is less than residual voltage
Switching voltage magnitude definite value；Described remnant voltage switch voltage magnitude definite value is the contact net rated voltage of 20%-40%.
Method the most according to claim 2, is characterized in that, in step 6, in switching in parallel, parallel connection is switched fast condition and is:
Pressure reduction, frequency difference between contact net busbar voltage with stand-by power supply busbar voltage and differ, be respectively smaller than normal switching pressure reduction in parallel,
Normal switching frequency difference in parallel and normal switching difference in parallel.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532916A (en) * | 2016-12-07 | 2017-03-22 | 中国直升机设计研究所 | Parallel power supply control method for storage battery packs |
| CN108345706A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of emulation mode that power supply is cut soon and model |
| CN108471110A (en) * | 2018-03-15 | 2018-08-31 | 株洲瑞泰装备技术有限公司 | A kind of electronic switching cabinet of dual power supply |
| CN109669071A (en) * | 2018-11-21 | 2019-04-23 | 绵阳市维博电子有限责任公司 | External power grid phase difference monitors sensor and external power grid phase monitor system |
| CN109742845A (en) * | 2018-12-28 | 2019-05-10 | 江苏金智科技股份有限公司 | A kind of power supply fast switching device rapid closing method based on optimal phase |
| CN110932382A (en) * | 2019-11-29 | 2020-03-27 | 中国海洋石油集团有限公司 | Method suitable for fast switching of power supply |
| CN113783293A (en) * | 2021-07-20 | 2021-12-10 | 珠海万力达电气自动化有限公司 | Railway electric power operation and maintenance operation management and control system and method |
| CN113922362A (en) * | 2021-09-24 | 2022-01-11 | 国网北京市电力公司 | Circuit breaker control system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227091A (en) * | 2007-11-26 | 2008-07-23 | 江苏省电力公司苏州供电公司 | Intelligent power utilization system |
| CN101364746A (en) * | 2008-09-12 | 2009-02-11 | 云南电网公司曲靖供电局 | Self-adaptive standby power source self-throwing scheme for transforming plant lead-in circuit breaker |
| CN101741135A (en) * | 2009-12-29 | 2010-06-16 | 天津凯发电气股份有限公司 | Implementing method and application of programmable logic script in automatic switch-on system of standby power supply |
| JP2010188921A (en) * | 2009-02-19 | 2010-09-02 | Toshiba Corp | Control system of power feeding system for electric railroad |
| CN203275919U (en) * | 2012-11-23 | 2013-11-06 | 国家电网公司 | Main transformer switching device of traction substation based on DSP |
| CN105305602A (en) * | 2015-11-03 | 2016-02-03 | 成都交大许继电气有限责任公司 | Standby power system of railway digital traction substation and automatic switching method of standby power system |
-
2016
- 2016-07-07 CN CN201610533080.6A patent/CN105932769B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227091A (en) * | 2007-11-26 | 2008-07-23 | 江苏省电力公司苏州供电公司 | Intelligent power utilization system |
| CN101364746A (en) * | 2008-09-12 | 2009-02-11 | 云南电网公司曲靖供电局 | Self-adaptive standby power source self-throwing scheme for transforming plant lead-in circuit breaker |
| JP2010188921A (en) * | 2009-02-19 | 2010-09-02 | Toshiba Corp | Control system of power feeding system for electric railroad |
| CN101741135A (en) * | 2009-12-29 | 2010-06-16 | 天津凯发电气股份有限公司 | Implementing method and application of programmable logic script in automatic switch-on system of standby power supply |
| CN203275919U (en) * | 2012-11-23 | 2013-11-06 | 国家电网公司 | Main transformer switching device of traction substation based on DSP |
| CN105305602A (en) * | 2015-11-03 | 2016-02-03 | 成都交大许继电气有限责任公司 | Standby power system of railway digital traction substation and automatic switching method of standby power system |
Non-Patent Citations (2)
| Title |
|---|
| 李斌等: "《电力系统继电保护及自动装置》", 31 August 2015 * |
| 沙励: ""厂用电快速切换技术在发电厂的应用"", 《江苏电机工程》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532916A (en) * | 2016-12-07 | 2017-03-22 | 中国直升机设计研究所 | Parallel power supply control method for storage battery packs |
| CN106532916B (en) * | 2016-12-07 | 2019-10-18 | 中国直升机设计研究所 | A kind of battery group parallel operation control method |
| CN108345706A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of emulation mode that power supply is cut soon and model |
| CN108345706B (en) * | 2017-01-24 | 2021-10-08 | 中国石油化工股份有限公司 | Power supply fast switching simulation method and model |
| CN108471110A (en) * | 2018-03-15 | 2018-08-31 | 株洲瑞泰装备技术有限公司 | A kind of electronic switching cabinet of dual power supply |
| CN109669071A (en) * | 2018-11-21 | 2019-04-23 | 绵阳市维博电子有限责任公司 | External power grid phase difference monitors sensor and external power grid phase monitor system |
| CN109742845A (en) * | 2018-12-28 | 2019-05-10 | 江苏金智科技股份有限公司 | A kind of power supply fast switching device rapid closing method based on optimal phase |
| CN109742845B (en) * | 2018-12-28 | 2022-08-09 | 江苏金智科技股份有限公司 | Rapid switching-on method of power supply rapid switching-off device based on optimal phase |
| CN110932382A (en) * | 2019-11-29 | 2020-03-27 | 中国海洋石油集团有限公司 | Method suitable for fast switching of power supply |
| CN113783293A (en) * | 2021-07-20 | 2021-12-10 | 珠海万力达电气自动化有限公司 | Railway electric power operation and maintenance operation management and control system and method |
| CN113922362A (en) * | 2021-09-24 | 2022-01-11 | 国网北京市电力公司 | Circuit breaker control system and method |
| CN113922362B (en) * | 2021-09-24 | 2024-03-15 | 国网北京市电力公司 | Circuit breaker control system and method |
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