CN108988332A - A kind of double-bus power supply apparatus for fast switching and its control method - Google Patents
A kind of double-bus power supply apparatus for fast switching and its control method Download PDFInfo
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- CN108988332A CN108988332A CN201810871054.3A CN201810871054A CN108988332A CN 108988332 A CN108988332 A CN 108988332A CN 201810871054 A CN201810871054 A CN 201810871054A CN 108988332 A CN108988332 A CN 108988332A
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- H02J3/005—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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Abstract
The present invention provides a kind of double-bus power supply apparatus for fast switching and its control methods, including double-bus fast switching device, be arranged in the transformer end in the first transformer group T I and the second transformer group T II in transformer end between, including main controller, first group of transformer switching switch, second group of transformer switching switch, current-limiting reactor and bidirectional converter；Described first group of transformer switching switch one end is connected with the transformer end in the first transformer group T I, and the other end is separately connected bidirectional converter and current-limiting reactor；Described second group of transformer switching switch one end is connected with the transformer end in the second transformer group T II below bus II, and the other end is separately connected bidirectional converter and current-limiting reactor.Compared with prior art, being switched fast for the state individually powered and double-bus sectional power supply state is realized, solves the problems, such as load short term outage in prior art handoff procedure, power supply quality and stability are higher.
Description
Technical field
The present invention relates to a kind of double-bus power supply apparatus for fast switching and its control methods, are related to electric system power supply and distribution neck
Domain.
Background technique
The general higher occasion of burden requirement is required to double-bus power supply, after one section of bus-bar fault, it is desirable that another section of mother
Line can support all loads of two sections of buses.As shown in Figure 1, powering substation (with 10 for typical double-bus in the prior art
Platform transformer) wiring schematic diagram, including bus I, bus II, the first transformer group T I and the second transformer group T II；First becomes
The head end of depressor group T I is connected to bus I, and the head end of the second transformer group T II is connected to bus II；Fig. 1 is equipped with 10
The double-bus power supply bus arrangement schematic diagram of 10kV-400V transformer, in the illustration of FIG. 1, bus I is connected with 5 transformations
Device, T I -1, T I -2, T I -3, T I -4 and T I -5；Bus II is connected with 5 transformers, T II -1, T II -2, T II -3, T II -4 and T
Ⅱ-5；5 transformers of the first connection of transformer group T I, end connect one to one have switch K400_ I 1, K400_ I 2,
K400_ I 3, K400_ I 4 and K400_ I 5；5 transformers of second transformer group T II, end, which connects one to one, switch
K400_ II 1, K400_ II 2, K400_ II 3, K400_ II 4 and K400_ II 5；5 transformers of the first connection of transformer group T I
End is corresponded with the end of 5 transformers of the second transformer group T II to be connected, and has been arranged in a one-to-one correspondence respectively on line
Switch K400_1, K400_2, K400_3, K400_4 and K400_5.
Two sections of buses are required to regular visit, are needed between inspection by the load switching on inspection route to an other line
Road, handoff procedure, when being converted to II -1 T from T I -1 such as the load supplying under transformer T I -1, first disconnects switch K400_ I at present
1, reclose switch K400_1, on the one hand, due to 2 groups of transformer-supplied voltages come from 2 buses, the amplitude of output voltage and
Phase is different, will cause very big circulation, and on the other hand, the short time that will cause load power supply interrupts, to some important loads
Cause the loss of supply.
Summary of the invention
The present invention will provide a kind of double-bus power supply apparatus for fast switching and method, have power supply quality and stability more
High feature.
A kind of double-bus power supply apparatus for fast switching provided according to the present invention, which is characterized in that cut fastly including double-bus
Device, be arranged in the transformer end in the first transformer group T I and the second transformer group T II in transformer end between,
Including main controller, first group of transformer switching switch, second group of transformer switching switch, current-limiting reactor and bidirectional converter；
The first transformer group T I is arranged in bus I in the following, the second transformer group T II is arranged below bus II；
First group of transformer switching switch includes that the switching of at least one transformer switchs, in one end and the first transformer group T I
Transformer end be connected, the other end is separately connected bidirectional converter and current-limiting reactor；First group of transformer switching is opened
Transformer switching switch and the transformer in the first transformer group T I in the Central Shanxi Plain are one-to-one relationship；
Second group of transformer switching switch includes at least one transformer switching switch, and second below one end and bus II
Transformer end in transformer group T II is connected, and the other end is separately connected bidirectional converter and current-limiting reactor；Described second group
Transformer switching switch in transformer switching switch and the transformer in the second transformer group T II are one-to-one relationship；
The bidirectional converter and current-limiting reactor are set to first group of transformer switching switch and second group of transformer switching is opened
Between pass；Transformer switching switch in first group of transformer switching switch and second group of transformer switching switch is one by one
Corresponding relationship；
The master controller, is connected with bidirectional converter and feed(er) reactor respectively；
The bidirectional converter is AC/DC/AC bidirectional converter, can be realized the transformation of electrical energy that AC-to DC arrives exchange again,
Energy can from left to right also can be from right to left.
The master controller is connected with each transformer switching switch respectively again.
Further include voltage and current acquisition module, be connected with master controller, including first voltage current acquisition module, for adopting
Collect the voltage and current signal of first group of transformer switching switch other end；Second voltage current acquisition module, for acquiring second
The voltage and current signal of the group transformer switching switch other end.
Further include man-machine interactive interface, be connected with main controller, is received user instructions as user interface.
A kind of double-bus power supply fast switch over method, is realized on the basis of above-mentioned double-bus powers apparatus for fast switching,
Specific method includes,
Under original state, i.e., in the state of not needing switching power supply buses, first group of transformer switching switch and second group of change
Depressor switching switch is in off-state；
Under double-bus sectional power supply state, judge whether that needing to be switched to another bus from a bussed supply is individually to supply
Electricity, if it is, carrying out transformer switching, specific method includes:
If necessary to be switched to the corresponding transformer in the second transformer group from a certain transformer in the first transformer group, then,
Step 1-1 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；
Step 1-2, the corresponding first group of transformer of a certain transformer being closed in the first transformer group switch in switch
Transformer switching switch；
Step 1-3, control bidirectional converter starts close to one end of first group of transformer switching switch, and exports electric current to compensate
Reactive current caused by current-limiting reactor is put into；
Step 1-4, the corresponding second group of transformer of the corresponding transformer being closed in the second transformer group switch in switch
Transformer switching switch；
Step 1-5, control bidirectional converter starts close to one end of second group of transformer switching switch, and exports electric current to compensate
Reactive current caused by current-limiting reactor is put into；
Step 1-6 disconnects the connection of a certain transformer and double-bus fast switching device in the first transformer group；
Step 1-7 configures bidirectional converter by master controller and works close to one end of first group of transformer switching switch simultaneously
Net voltage compensation mode；
Step 1-8, control bidirectional converter switch the voltage of one end output switched close to first group of transformer to compensate current limliting
Voltage Drop caused by reactor band carries；
Step 1-9 is closed a certain transformer end in the first transformer group and the corresponding transformation in the second transformer group
Switch on the line of device end；
Step 1-10 restores the original state of the double-bus fast switching device；
If necessary to be switched to the corresponding transformer in the first transformer group from a certain transformer in the second transformer group, then,
Step 2-1 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；
Step 2-2, the corresponding second group of transformer of a certain transformer being closed in the second transformer group switch in switch
Transformer switching switch；
Step 2-3, control bidirectional converter starts close to one end of second group of transformer switching switch, and exports electric current to compensate
Reactive current caused by current-limiting reactor is put into；
Step 2-4, the corresponding first group of transformer of the corresponding transformer being closed in the first transformer group switch in switch
Transformer switching switch；
Step 2-5, control bidirectional converter starts close to one end of first group of transformer switching switch, and exports electric current to compensate
Reactive current caused by current-limiting reactor is put into；
Step 2-6 disconnects the connection of a certain transformer and double-bus fast switching device in the second transformer group；
Step 2-7 configures bidirectional converter by master controller and works close to one end of second group of transformer switching switch simultaneously
Net voltage compensation mode；
Step 2-8, control bidirectional converter switch the voltage of one end output switched close to second group of transformer to compensate current limliting
Voltage Drop caused by reactor band carries；
Step 2-9 is closed a certain transformer end in the second transformer group and the corresponding transformation in the first transformer group
Switch on the line of device end；
Step 2-10 restores the original state of the double-bus fast switching device.
The method also includes judging whether to need to be restored to double-bus sectional power supply from the independent power supply state of single bus
State, if it is, carrying out transformer switching, specific method includes:
If necessary to a certain transformer being restored to from the corresponding transformer in the second transformer group in the first transformer group
Power supply, then,
Step 1-11 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；
Step 1-12, the corresponding first group of transformer of a certain transformer being closed in the first transformer group switch in switch
Transformer switching switch；And the corresponding second group of transformer switching of corresponding transformer in closure the second transformer group is opened
The transformer in the Central Shanxi Plain switches switch；
Step 1-13, control bidirectional converter starts close to one end of second group of transformer switching switch, and exports electric current to mend
Repay reactive current caused by current-limiting reactor is put into；
Step 1-14, control bidirectional converter are zero not influence close to one end electric current output of first group of transformer switching switch
Current electric grid operation；
Step 1-15 disconnects a certain transformer end in the first transformer group and the corresponding transformation in the second transformer group
Switch on the line of device end, configuration bidirectional converter are grid-connected voltage compensation model；
Step 1-16, control bidirectional converter switch the voltage of one end output switched close to first group of transformer to compensate current limliting
Voltage Drop caused by reactor band carries；
Step 1-17 configures bidirectional converter by master controller and works close to one end of first group of transformer switching switch simultaneously
Net voltage compensation mode；
Step 1-18, the connection of a certain transformer and double-bus fast switching device in the first transformer group described in access；
Step 1-19 restores the original state of the double-bus fast switching device.
The method also includes if necessary to be restored to the second transformation from the corresponding transformer in the first transformer group
A certain transformer-supplied in device group, then,
Step 2-11 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；
Step 2-12, the corresponding second group of transformer of a certain transformer being closed in the second transformer group switch in switch
Transformer switching switch；And the corresponding first group of transformer switching of corresponding transformer in closure the first transformer group is opened
The transformer in the Central Shanxi Plain switches switch；
Step 2-13, control bidirectional converter starts close to one end of first group of transformer switching switch, and exports electric current to mend
Repay reactive current caused by current-limiting reactor is put into；
Step 2-14, control bidirectional converter are zero not influence close to one end electric current output of second group of transformer switching switch
Current electric grid operation；
Step 2-15 disconnects a certain transformer end in the second transformer group and the corresponding transformation in the first transformer group
Switch on the line of device end, configuration bidirectional converter are grid-connected voltage compensation model；
Step 2-16, control bidirectional converter switch the voltage of one end output switched close to second group of transformer to compensate current limliting
Voltage Drop caused by reactor band carries；
Step 2-17 configures bidirectional converter by master controller and works close to one end of second group of transformer switching switch simultaneously
Net voltage compensation mode；
Step 2-18, the connection of a certain transformer and double-bus fast switching device in the second transformer group described in access；
Step 2-19 restores the original state of the double-bus fast switching device.
The method also includes passing through the disconnection and closure of each transformer switching switch of main controller controls.
The method also includes by the voltage and current signal of first group of transformer switching switch other end of acquisition, to sentence
It is disconnected whether to need the individually power supply from I power switching of bus to bus II；Pass through second group of transformer switching switch other end of acquisition
Voltage and current signal, to determine whether need from II power switching of bus to bus I individually power supply.
The method also includes, by man-machine interactive interface, the operating mode for needing to be arranged to master controller setting, by leading
Handoff procedure is completed in controller control.
Compared with prior art, being switched fast for the state individually powered and double-bus sectional power supply state is realized, is solved
In the prior art of having determined handoff procedure the problem of load short term outage, power supply quality and stability are higher.
Detailed description of the invention
Fig. 1 is the wiring schematic diagram of the substation of typical double-bus power supply in the prior art.
Fig. 2 is the double-bus power supply apparatus for fast switching wiring schematic diagram of a wherein embodiment of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Any feature disclosed in this specification (including abstract and attached drawing) unless specifically stated can be equivalent by other
Or the alternative features with similar purpose are replaced.That is, unless specifically stated, each feature is a series of equivalent or class
Like an example in feature.
A kind of double-bus power supply apparatus for fast switching as shown in Figure 2, including double-bus fast switching device, setting become first
In depressor group T I (in this embodiment, bus I is connected with 5 transformers, T I -1, T I -2, T I -3, T I -4 and T I -5)
(in this embodiment, bus II is connected with 5 transformers, T II -1, T to second transformer group T II of transformer end sum
II -2, T II -3, T II -4 and T II -5) in transformer end between, including main controller, first group of transformer switching switch (
In this specific embodiment, including respectively with first group of transformer correspondingly switch K400_ I _ 1, K400_ I _ 2, K400_ I _
3, K400_ I _ 4 and K400_ I _ 5), second group of transformer switching switch (in this embodiment, including respectively with second group
Transformer switch K400_ II _ 1, K400_ II _ 2, K400_ II _ 3, K400_ II _ 4 and K400_ II _ 5 correspondingly), current limliting
Reactor and bidirectional converter；The first transformer group T I is arranged in bus I in the following, the second transformer group T II is arranged in mother
Below line II；
First group of transformer switching switch includes that the switching of at least one transformer switchs, in one end and the first transformer group T I
Transformer end be connected, the other end is separately connected bidirectional converter and current-limiting reactor；First group of transformer switching is opened
Transformer switching switch and the transformer in the first transformer group T I in the Central Shanxi Plain are one-to-one relationship；
Second group of transformer switching switch includes at least one transformer switching switch, and second below one end and bus II
Transformer end in transformer group T II is connected, and the other end is separately connected bidirectional converter and current-limiting reactor；Described second group
Transformer switching switch in transformer switching switch and the transformer in the second transformer group T II are one-to-one relationship；
The bidirectional converter and current-limiting reactor are set to first group of transformer switching switch and second group of transformer switching is opened
Between pass；Transformer switching switch in first group of transformer switching switch and second group of transformer switching switch is one by one
Corresponding relationship；
The master controller, is connected with bidirectional converter and feed(er) reactor respectively；
The bidirectional converter is AC/DC/AC bidirectional converter, can be realized the transformation of electrical energy that AC-to DC arrives exchange again,
Energy can from left to right also can be from right to left.
In this embodiment, as shown in Fig. 2, to be connect in typical double-bus power supply substation (being equipped with 10 transformers)
On the basis of line, double-bus fast switching device is set；Match, the double-bus fast switching device is that 400V double-bus cuts dress fastly
It sets；5 transformers of the first connection of transformer group T I, end, which connects one to one, switch K400_ I 1, K400_ I 2, K400_ I
3, K400_ I 4 and K400_ I 5；5 transformers of the second connection of transformer group T II, end, which connects one to one, switch K400_
II 1, K400_ II 2, K400_ II 3, K400_ II 4 and K400_ II 5；The end of second transformer group T II and the first transformer group T
It has been arranged in a one-to-one correspondence switch K400_1, K400_2, K400_3, K400_4 and K400_5 respectively on the end line of I connection.
Wherein, master controller can control the working condition of AC/DC/AC bidirectional converter；Current-limiting reactor, which is realized, to be needed
The Electromagnetic coupling of two transformers of switching limits circulation, and the circuit in handoff procedure for excision transformer provides active power.
AC/DC/AC bidirectional converter realizes that AC-to DC arrives the transformation of electrical energy of exchange again, energy can from left to right also from the right side to
A left side, including grid-connected power factor compensation mode and grid-connected voltage compensation model, the port of direct-connected transformer output run on grid-connected
Power factor compensation mode connects transformation by current-limiting reactor for compensating reactive current caused by electric current reactor is put into
The port of device runs on grid-connected voltage compensation model, Voltage Drop caused by being put into for compensation due to current-limiting reactor.
The double-bus power supply apparatus for fast switching of the present invention program can be easy to implement the state and double-bus individually powered
Sectional power supply state is switched fast, and then solves the problems, such as load short term outage in prior art handoff procedure, makes to supply
Electricity quality and stability are higher.
As one embodiment of the present invention, the master controller is connected with each transformer switching switch respectively again,
It can be used for acquiring the switch state of each transformer switching switch and controlled.
As one embodiment of the present invention, further includes voltage and current acquisition module, be connected with master controller, including the
One voltage and current acquisition module, for acquiring the voltage and current signal of first group of transformer switching switch other end；Second voltage
Current acquisition module, for acquiring the voltage and current signal of second group of transformer switching switch other end.
As one embodiment of the present invention, further includes man-machine interactive interface, be connected with main controller, as user interface
It receives user instructions.
A kind of double-bus power supply fast switch over method, is realized on the basis of above-mentioned double-bus powers apparatus for fast switching,
Specific method includes,
Under original state, i.e., in the state of not needing switching power supply buses, first group of transformer switching switch and second group of change
Depressor switching switch is in off-state；
Under double-bus sectional power supply state, judge whether that needing to be switched to another bus from a bussed supply is individually to supply
Electricity, if it is, carrying out transformer switching, specific method includes:
If necessary to be switched to the corresponding transformer in the second transformer group from a certain transformer in the first transformer group, then,
Step 1-1 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；
Step 1-2, a certain transformer (by taking transformer T I -1 as an example) being closed in the first transformer group are first group corresponding
Transformer switching switch (K400_ I _ 1) in transformer switching switch；
Step 1-3, control bidirectional converter starts close to one end (i.e. left end) of first group of transformer switching switch, and exports electricity
Stream is to compensate reactive current caused by current-limiting reactor is put into；
Step 1-4, the corresponding second group of transformer switching of the corresponding transformer (T II -1) being closed in the second transformer group are opened
The transformer switching switch (K400_ II _ 1) in the Central Shanxi Plain；
Step 1-5, control bidirectional converter starts close to one end (i.e. right end) of second group of transformer switching switch, and exports electricity
Stream is to compensate reactive current caused by current-limiting reactor is put into；
Step 1-6 disconnects the connection of a certain transformer (T I -1) and double-bus fast switching device in the first transformer group；
Step 1-7 configures bidirectional converter close to one end (i.e. left end) of first group of transformer switching switch by master controller
Work is in grid-connected voltage compensation model；
Step 1-8, control bidirectional converter close to one end (i.e. left end) output of first group of transformer switching switch voltage with
Compensate Voltage Drop caused by current-limiting reactor band carries；
Step 1-9 is closed a certain transformer end in the first transformer group and the corresponding transformation in the second transformer group
Switch (K400_1) on the line of device end；
Step 1-10 restores the original state of the double-bus fast switching device；
After the completion of step 1-9, show load switching success, man-machine interactive interface notifies customer charge to switch successfully.
If necessary to be switched to the corresponding transformer in the first transformer group from a certain transformer in the second transformer group,
Then,
Step 2-1 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；
Step 2-2, the corresponding second group of transformer of a certain transformer being closed in the second transformer group switch in switch
Transformer switching switch；
Step 2-3, control bidirectional converter starts close to one end (i.e. right end) of second group of transformer switching switch, and exports electricity
Stream is to compensate reactive current caused by current-limiting reactor is put into；
Step 2-4, the corresponding first group of transformer of the corresponding transformer being closed in the first transformer group switch in switch
Transformer switching switch；
Step 2-5, control bidirectional converter starts close to one end (i.e. left end) of first group of transformer switching switch, and exports electricity
Stream is to compensate reactive current caused by current-limiting reactor is put into；
Step 2-6 disconnects the connection of a certain transformer and double-bus fast switching device in the second transformer group；
Step 2-7 configures bidirectional converter close to one end (i.e. right end) of second group of transformer switching switch by master controller
Work is in grid-connected voltage compensation model；
Step 2-8, control bidirectional converter close to one end (i.e. right end) output of second group of transformer switching switch voltage with
Compensate Voltage Drop caused by current-limiting reactor band carries；
Step 2-9 is closed a certain transformer end in the second transformer group and the corresponding transformation in the first transformer group
Switch on the line of device end；
Step 2-10 restores the original state of the double-bus fast switching device.
After the completion of step 2-9, show load switching success, man-machine interactive interface notifies customer charge to switch successfully.
In the present invention program, in double-bus handoff procedure, power grid short interruptions afterload is by current-limiting reactor and two-way
Current transformer is powered simultaneously, and bidirectional converter switches fortune between grid-connected power factor compensation mode and grid-connected voltage compensation model
Row, realizes being switched fast for double-bus, and solve the problems, such as load short term outage in prior art handoff procedure, makes to supply
Electricity quality and stability are higher.
As one embodiment of the present invention, the method also includes judging whether to need individually to supply from single bus
Electricity condition is restored to double-bus sectional power supply state, if it is, carrying out transformer switching, specific method includes:
If necessary to a certain transformer being restored to from the corresponding transformer in the second transformer group in the first transformer group
Power supply, then,
Step 1-11 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；
Step 1-12, the corresponding first group of transformer of a certain transformer being closed in the first transformer group switch in switch
Transformer switching switch；And the corresponding second group of transformer switching of corresponding transformer in closure the second transformer group is opened
The transformer in the Central Shanxi Plain switches switch；
Step 1-13, control bidirectional converter starts close to one end (i.e. right end) of second group of transformer switching switch, and exports
Electric current is to compensate reactive current caused by current-limiting reactor is put into；
Step 1-14, control bidirectional converter are zero close to one end (i.e. left end) electric current output of first group of transformer switching switch
Not influence current electric grid operation；
Step 1-15 disconnects a certain transformer end in the first transformer group and the corresponding transformation in the second transformer group
Switch on the line of device end, configuration bidirectional converter are grid-connected voltage compensation model；
Step 1-16, control bidirectional converter close to one end (i.e. left end) output of first group of transformer switching switch voltage with
Compensate Voltage Drop caused by current-limiting reactor band carries；
Step 1-17 configures bidirectional converter close to one end (i.e. left end) of first group of transformer switching switch by master controller
Work is in grid-connected voltage compensation model；
Step 1-18, the connection of a certain transformer and double-bus fast switching device in the first transformer group described in access；
Step 1-19 restores the original state of the double-bus fast switching device.
After the completion of step 1-18, show load switching success, man-machine interactive interface notifies customer charge to switch successfully.
As one embodiment of the present invention, the method also includes if necessary to from the first transformer group
Corresponding transformer be restored to a certain transformer-supplied in the second transformer group, then,
Step 2-11 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；
Step 2-12, the corresponding second group of transformer of a certain transformer being closed in the second transformer group switch in switch
Transformer switching switch；And the corresponding first group of transformer switching of corresponding transformer in closure the first transformer group is opened
The transformer in the Central Shanxi Plain switches switch；
Step 2-13, control bidirectional converter starts close to one end (i.e. left end) of first group of transformer switching switch, and exports
Electric current is to compensate reactive current caused by current-limiting reactor is put into；
Step 2-14, control bidirectional converter are zero close to one end (i.e. right end) electric current output of second group of transformer switching switch
Not influence current electric grid operation；
Step 2-15 disconnects a certain transformer end in the second transformer group and the corresponding transformation in the first transformer group
Switch on the line of device end, configuration bidirectional converter are grid-connected voltage compensation model；
Step 2-16, control bidirectional converter close to one end (i.e. right end) output of second group of transformer switching switch voltage with
Compensate Voltage Drop caused by current-limiting reactor band carries；
Step 2-17 configures bidirectional converter close to one end (i.e. right end) of second group of transformer switching switch by master controller
Work is in grid-connected voltage compensation model；
Step 2-18, the connection of a certain transformer and double-bus fast switching device in the second transformer group described in access；
Step 2-19 restores the original state of the double-bus fast switching device.
After the completion of step 2-18, show load switching success, man-machine interactive interface notifies customer charge to switch successfully.
As one embodiment of the present invention, the method also includes being cut by each transformer of main controller controls
Change the disconnection and closure of switch.
As one embodiment of the present invention, the method also includes passing through first group of transformer switching switch of acquisition
The voltage and current signal of the other end, to determine whether needing the individually power supply from I power switching of bus to bus II；Pass through acquisition the
The voltage and current signal of two groups of transformer switching switch other ends, to determine whether needing from II power switching of bus to bus I
Individually power supply.
As one embodiment of the present invention, the method also includes being set to master controller by man-machine interactive interface
The operating mode for needing to be arranged is set, completes handoff procedure by main controller controls.
The present invention program realizes being switched fast for double-bus, and load power supply is free of discontinuities, and single group double-bus switching time is small
In 10 seconds.
Claims (10)
- The apparatus for fast switching 1. a kind of double-bus is powered, which is characterized in that including double-bus fast switching device, be arranged in the first transformation Transformer end in device group T I and the second transformer group T II in transformer end between, including main controller, first group of change Depressor switching switch, second group of transformer switching switch, current-limiting reactor and bidirectional converter；The first transformer group T I is set It sets in bus I in the following, the second transformer group T II is arranged below bus II；First group of transformer switching switch includes that the switching of at least one transformer switchs, in one end and the first transformer group T I Transformer end be connected, the other end is separately connected bidirectional converter and current-limiting reactor；First group of transformer switching is opened Transformer switching switch and the transformer in the first transformer group T I in the Central Shanxi Plain are one-to-one relationship；Second group of transformer switching switch includes at least one transformer switching switch, and second below one end and bus II Transformer end in transformer group T II is connected, and the other end is separately connected bidirectional converter and current-limiting reactor；Described second group Transformer switching switch in transformer switching switch and the transformer in the second transformer group T II are one-to-one relationship；The bidirectional converter and current-limiting reactor are set to first group of transformer switching switch and second group of transformer switching is opened Between pass；Transformer switching switch in first group of transformer switching switch and second group of transformer switching switch is one by one Corresponding relationship；The master controller, is connected with bidirectional converter and feed(er) reactor respectively；The bidirectional converter is AC/DC/AC bidirectional converter, can be realized the transformation of electrical energy that AC-to DC arrives exchange again, Energy can from left to right also can be from right to left.
- The apparatus for fast switching 2. double-bus according to claim 1 is powered, which is characterized in that the master controller is distinguished again It is connected with each transformer switching switch.
- The apparatus for fast switching 3. double-bus according to claim 1 is powered, which is characterized in that further include voltage and current acquisition Module is connected with master controller, including first voltage current acquisition module, another for acquiring first group of transformer switching switch The voltage and current signal at end；Second voltage current acquisition module, for acquiring the electricity of second group of transformer switching switch other end Current voltage signal.
- The apparatus for fast switching 4. double-bus according to claim 1 is powered, which is characterized in that further include that human-computer interaction connects Mouthful, it is connected with main controller, is received user instructions as user interface.
- The fast switch over method 5. a kind of double-bus is powered realizes have on the basis of above-mentioned double-bus powers apparatus for fast switching Body method includes,Under original state, i.e., in the state of not needing switching power supply buses, first group of transformer switching switch and second group of change Depressor switching switch is in off-state；Under double-bus sectional power supply state, judge whether that needing to be switched to another bus from a bussed supply is individually to supply Electricity, if it is, carrying out transformer switching, specific method includes:If necessary to be switched to the corresponding transformer in the second transformer group from a certain transformer in the first transformer group, then,Step 1-1 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；Step 1-2, the corresponding first group of transformer of a certain transformer being closed in the first transformer group switch in switch Transformer switching switch；Step 1-3, control bidirectional converter starts close to one end of first group of transformer switching switch, and exports electric current to compensate Reactive current caused by current-limiting reactor is put into；Step 1-4, the corresponding second group of transformer of the corresponding transformer being closed in the second transformer group switch in switch Transformer switching switch；Step 1-5, control bidirectional converter starts close to one end of second group of transformer switching switch, and exports electric current to compensate Reactive current caused by current-limiting reactor is put into；Step 1-6 disconnects the connection of a certain transformer and double-bus fast switching device in the first transformer group；Step 1-7 configures bidirectional converter by master controller and works close to one end of first group of transformer switching switch simultaneously Net voltage compensation mode；Step 1-8, control bidirectional converter switch the voltage of one end output switched close to first group of transformer to compensate current limliting Voltage Drop caused by reactor band carries；Step 1-9 is closed a certain transformer end in the first transformer group and the corresponding transformation in the second transformer group Switch on the line of device end；Step 1-10 restores the original state of the double-bus fast switching device；If necessary to be switched to the corresponding transformer in the first transformer group from a certain transformer in the second transformer group, then,Step 2-1 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；Step 2-2, the corresponding second group of transformer of a certain transformer being closed in the second transformer group switch in switch Transformer switching switch；Step 2-3, control bidirectional converter starts close to one end of second group of transformer switching switch, and exports electric current to compensate Reactive current caused by current-limiting reactor is put into；Step 2-4, the corresponding first group of transformer of the corresponding transformer being closed in the first transformer group switch in switch Transformer switching switch；Step 2-5, control bidirectional converter starts close to one end of first group of transformer switching switch, and exports electric current to compensate Reactive current caused by current-limiting reactor is put into；Step 2-6 disconnects the connection of a certain transformer and double-bus fast switching device in the second transformer group；Step 2-7 configures bidirectional converter by master controller and works close to one end of second group of transformer switching switch simultaneously Net voltage compensation mode；Step 2-8, control bidirectional converter switch the voltage of one end output switched close to second group of transformer to compensate current limliting Voltage Drop caused by reactor band carries；Step 2-9 is closed a certain transformer end in the second transformer group and the corresponding transformation in the first transformer group Switch on the line of device end；Step 2-10 restores the original state of the double-bus fast switching device.
- The fast switch over method 6. double-bus according to claim 5 is powered, the method also includes, judge whether to need from The single independent power supply state of bus is restored to double-bus sectional power supply state, if it is, carrying out transformer switching, specific method Include:If necessary to a certain transformer being restored to from the corresponding transformer in the second transformer group in the first transformer group Power supply, then,Step 1-11 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；Step 1-12, the corresponding first group of transformer of a certain transformer being closed in the first transformer group switch in switch Transformer switching switch；And the corresponding second group of transformer switching of corresponding transformer in closure the second transformer group is opened The transformer in the Central Shanxi Plain switches switch；Step 1-13, control bidirectional converter starts close to one end of second group of transformer switching switch, and exports electric current to mend Repay reactive current caused by current-limiting reactor is put into；Step 1-14, control bidirectional converter are zero not influence close to one end electric current output of first group of transformer switching switch Current electric grid operation；Step 1-15 disconnects a certain transformer end in the first transformer group and the corresponding transformation in the second transformer group Switch on the line of device end, configuration bidirectional converter are grid-connected voltage compensation model；Step 1-16, control bidirectional converter switch the voltage of one end output switched close to first group of transformer to compensate current limliting Voltage Drop caused by reactor band carries；Step 1-17 configures bidirectional converter by master controller and works close to one end of first group of transformer switching switch simultaneously Net voltage compensation mode；Step 1-18, the connection of a certain transformer and double-bus fast switching device in the first transformer group described in access；Step 1-19 restores the original state of the double-bus fast switching device.
- The fast switch over method 7. double-bus according to claim 5 is powered, the method also includes if necessary from described Corresponding transformer in first transformer group is restored to a certain transformer-supplied in the second transformer group, then,Step 2-11 configures the work of bidirectional converter left and right ends in grid-connected power factor compensation mode by master controller；Step 2-12, the corresponding second group of transformer of a certain transformer being closed in the second transformer group switch in switch Transformer switching switch；And the corresponding first group of transformer switching of corresponding transformer in closure the first transformer group is opened The transformer in the Central Shanxi Plain switches switch；Step 2-13, control bidirectional converter starts close to one end of first group of transformer switching switch, and exports electric current to mend Repay reactive current caused by current-limiting reactor is put into；Step 2-14, control bidirectional converter are zero not influence close to one end electric current output of second group of transformer switching switch Current electric grid operation；Step 2-15 disconnects a certain transformer end in the second transformer group and the corresponding transformation in the first transformer group Switch on the line of device end, configuration bidirectional converter are grid-connected voltage compensation model；Step 2-16, control bidirectional converter switch the voltage of one end output switched close to second group of transformer to compensate current limliting Voltage Drop caused by reactor band carries；Step 2-17 configures bidirectional converter by master controller and works close to one end of second group of transformer switching switch simultaneously Net voltage compensation mode；Step 2-18, the connection of a certain transformer and double-bus fast switching device in the second transformer group described in access；Step 2-19 restores the original state of the double-bus fast switching device.
- The fast switch over method 8. double-bus according to one of claim 5 to 7 is powered, the method also includes passing through master Controller controls the disconnection and closure of each transformer switching switch.
- The fast switch over method 9. double-bus according to one of claim 5 to 7 is powered, the method also includes by adopting The voltage and current signal for collecting first group of transformer switching switch other end, to determine whether needing from I power switching of bus to mother Line II is individually powered；By the voltage and current signal of second group of transformer switching switch other end of acquisition, to determine whether needing The individually power supply from II power switching of bus to bus I.
- The fast switch over method 10. double-bus according to one of claim 5 to 7 is powered, the method also includes passing through people Machine interactive interface, the operating mode for needing to be arranged to master controller setting, completes handoff procedure by main controller controls.
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