CN106887957A - A kind of hybrid distribution transformer of Multiple coil magnetic integrated-type - Google Patents
A kind of hybrid distribution transformer of Multiple coil magnetic integrated-type Download PDFInfo
- Publication number
- CN106887957A CN106887957A CN201710167121.9A CN201710167121A CN106887957A CN 106887957 A CN106887957 A CN 106887957A CN 201710167121 A CN201710167121 A CN 201710167121A CN 106887957 A CN106887957 A CN 106887957A
- Authority
- CN
- China
- Prior art keywords
- winding
- transformer
- phase
- current
- current transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
Abstract
The present invention discloses a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type, including a secondary iron core, current transformer group and three-phase windings.The iron core is linked to be by iron yoke, upper core post and lower core post.Every group of current transformer is made up of current control current transformer and voltage control variable stream device.The three-phase windings include main transformer winding, series transformer winding and filter inductance.Wherein, per a first winding, a Secondary Winding and multiple controling windings is mutually included, series transformer winding is every mutually to include a source side winding and multiple current transformer side windings to main transformer winding.Each current control current transformer accesses corresponding controling winding, controls power network current, each voltage control variable stream device to access current transformer side winding control load voltage by magnetic potential balance principle.Realize that the Integrated design of each discrete magnetic part of multiwinding transformer can improve the utilization rate of ferromagnetic material and the control capability of equipment using integrated magnetic, it is multigroup current transformer cooperation, standby each other, the reliability of equipment can be effectively improved.
Description
Technical field
The present invention relates to a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type, belong to transformer technology field.
Background technology
Following development trend of intelligent grid proposes new requirement, distribution transformer to the performance of common electrical distribution transformer
Except that should possess voltage class conversion, electric energy transmission etc. in addition to basic function, should also have concurrently stable power-supplying voltage, power flowcontrol,
Current harmonics elimination, PFC, reactive-load compensation, asymmetric control, status monitoring, short-circuit protection, AC-to-DC are powered
Various functions.
Under this engineering background, electric power electric transformer (PET) turns into current research heat with its powerful controllability
Point, but PET schemes are converted based on total power, using multilevel converter unit, cause its device whole efficiency low, it is reliable
Property is poor, and will more be protruded in capacity this shortcoming of bigger occasion.Therefore, Co., Ltd of ABB research institutes Sandeep
With distribution transformer be combined AC-DC-AC current transformers by the scholars such as bala, proposes the design philosophy of hybrid distribution transformer,
The program disclosure satisfy that demand for development of the following intelligent grid for distribution transformer, and its distinguishing feature is become using Partial Power
Change and realize controllable, reliability is high, be lost small, be highly suitable as power distribution network intelligent transformer of future generation.
But less about the report of hybrid distribution transformer at present, the research work of domestic and foreign scholars has still been in step
Section, as urban area distribution load is increasingly intensive, capacity expands rapidly, the diversity of load is improved constantly, hybrid distribution
Transformer needs to develop to directions such as Large Copacity is controllable, high reliability, small integrateds.
The content of the invention
It is an object of the invention to provide a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type.
To reach above-mentioned purpose, present invention employs following technical scheme：
The distribution transformer includes converter module and is integrated with three-phase three-limb main transformer and three-phase five-limb string
Join the multiwinding transformer body of transformer, the multiwinding transformer body includes the main transformer module that primary side winding is connected
With series transformer module, the converter module include multiple secondary with main transformer module and series transformer module around
All windings of the AC-DC-AC converter cells that group is respectively connected with, main transformer module and series transformer module are arranged at together
On one iron core.
Each AC-DC-AC converter cell includes current control current transformer, voltage control variable stream device and by current control
The dc-link capacitance that current transformer is shared with voltage control variable stream device；Current control current transformer, voltage control variable stream device are respective
AC is connected to low pass filter.
Carrier phase technology is used between each AC-DC-AC converter cells carry out signal modulation with reducing compensation electric current
Higher harmonic content.
Winding of the main transformer module per phase include a first winding, a Secondary Winding and multiple control around
Group, winding of the series transformer module per phase includes a source side winding and multiple current transformer side windings；First winding is first
Terminate into power network, first winding end is connected with the source side winding head end of corresponding phase, and each phase source side winding end is connected together simultaneously
Neutral point is accessed into the earth；The head end of each phase Secondary Winding is drawn, and end is linked to be a neutral point, forms three-phase four-wire system wiring
To load supplying；Each phase control winding uses wye connection, each phase head end to be respectively connected to corresponding A C- with current transformer side winding
The current control current transformer output inductor of DC-AC converter cells and voltage control variable stream device output inductor, it is neutral
Point accesses respective AC-DC-AC converter cells dc-link capacitance midpoint.
The first winding undertakes power network rated voltage, and source side winding undertakes voltage pulsation component, by controlling each AC-
The voltage control variable stream device of DC-AC converter cells realizes load voltage stability contorting.
The current control current transformer of the AC-DC-AC converter cells is controlled as current source, based on magnetic potential balance principle
Each controling winding shares compensation electric current to realize the sinusoidal symmetrical control of power network current jointly.
The number of the AC-DC-AC converter cells, every phase control winding and every phase current transformer side winding is equal, each
AC-DC-AC converter cells access corresponding controling winding and current transformer side winding, wherein, current control current transformer is accessed
Controling winding, and voltage control variable stream device accesses current transformer side winding；Each AC-DC-AC converter cells are isolated from each other, mutually solely
It is vertical, multiple dc sources being isolated from each other externally are provided.
The iron core includes top iron yoke, middle part iron yoke, bottom iron yoke, upper core post and lower core limb, the upper core
Post is connected between top iron yoke and middle part iron yoke, and the lower core limb is connected between middle part iron yoke and bottom iron yoke, upper iron
Stem shares middle part iron yoke with lower core post.
The lower core limb uses pentastyle structure that magnetic conduction branch road is provided for zero sequence fluxes, in order to realize that residual voltage is mended
Repay.
The winding of the main transformer module and series transformer module per phase uses laminar winding, respectively concentric coiling
In the iron core column of this phase；Output inductor of each AC-DC-AC converter cells per phase is split as two of equal turn numbers
Point, after differential concatenation, lap wound is in the iron core column of this phase one by one；Winding of the main transformer module per phase is from outside to inside successively
It is the current control current transformer output inductor of first winding, Secondary Winding, controling winding and AC-DC-AC converter cells；
Winding of the series transformer module per phase is followed successively by source side winding, current transformer side winding and AC-DC-AC unsteady flows from outside to inside
The voltage control variable stream device output inductor of device unit.
Compared with prior art, the present invention at least has following technique effect：
The present invention accesses multigroup AC-DC-AC converter cells and can be obviously improved existing mixing using multiwinding transformer structure
The control capability of box-like distribution transformer, using integrated magnetic by each discrete magnetic part Integrated design, device volume is small, ferromagnetic material
Material utilization rate is high.Series transformer module can effectively realize the asymmetry compensation of voltage using three-phase and five-pole core structure.It is each to become
Stream device unit is isolated from each other by transformer, can be provided out multiple independent dc bus, very convenient access distributed electrical
Source, realizes direct current supply.
Further, carrier phase technology can be used between each converter cell, the height that current transformer brings can be effectively reduced
Subharmonic.Each converter cell is standby each other when control power is smaller, with fault tolerance, so as to improve the reliability of equipment
Property.Each converter cell cooperation possesses the control function of more horn of plenty than conventional hybrid formula distribution transformer.Each winding turns
Number can quite facilitate according to application scenario flexible configuration, the type selecting of each unit power device and configuration.
Brief description of the drawings
Fig. 1 is the winding circuit module diagram of the Multiple coil hybrid distribution transformer of magnetic integrated-type.
Fig. 2 is the converter module circuit topology schematic diagram of the Multiple coil hybrid distribution transformer of magnetic integrated-type.
Fig. 3 is the magnetic integration apparatus schematic diagram of the Multiple coil hybrid distribution transformer of magnetic integrated-type.
The connection terminal "○" of each element is labelled with Fig. 1, Fig. 2.
Specific embodiment
In order to become apparent from illustrating the objects, technical solutions and advantages of the present invention, below in conjunction with drawings and Examples to this
Invention is further elaborated.It should be appreciated that embodiments described herein is only used to explain the present invention, limit is not used to
The fixed present invention.
The hybrid distribution transformer of Multiple coil magnetic integrated-type of the present invention uses integrated magnetic by three-phase three-limb
Main transformer and three-phase five-limb series transformer carry out Integrated design, including a secondary iron core, multiple AC-DC-AC current transformers and
It is wound on the three-phase windings on the secondary iron core.The iron core is led to by a three-phase three-limb iron core and a three-phase five-limb iron core
Cross and share middle part iron yoke is integrated forms, altogether including three iron yokes, three upper core posts and five lower core posts.Each AC-DC-AC
Current transformer includes current control current transformer and voltage control variable stream device, the two general DC busbar electric capacity.The three-phase windings bag
The series connection of the main transformer winding, the concentric coiling that are wound on three upper core posts with one heart wherein on three lower core posts is included to become
Depressor winding, split after each current control current transformer output inductor on three upper core posts of differential concatenation and lap wound and
Each voltage control variable stream device output inductor of the differential concatenation lap wound on three lower core posts after fractionation.Wherein, it is main
Transformer Winding includes a first winding, a Secondary Winding and multiple controling windings, and series transformer winding includes one
Source side winding, multiple current transformer side windings.Every phase control winding, every phase current transformer side winding, AC-DC-AC current transformers three
Number is identical.
As shown in figure 1, the winding circuit module bag of the hybrid distribution transformer of Multiple coil magnetic integrated-type of the present invention
Include main transformer module 26 and series transformer module 27.Winding of the main transformer module 26 per phase include first winding,
(the present embodiment sets three controling windings, is followed successively by the first controling winding, the second control for one Secondary Winding and multiple controling windings
Winding processed, the 3rd controling winding).In each phase, first winding (is followed successively by a phase first winding 1a, b phase first windings 1b, c phase one
Secondary winding 1c) head/end be followed successively by A1/X1、B1/Y1、C1/Z1；Secondary Winding (is followed successively by a phase Secondary Windings 2a, b phase two
Secondary winding 2b, c phase Secondary Winding 2c) each phase head/end be followed successively by a2/x2、b2/y2、c2/z2；First controling winding is (successively
Be the first controling winding 31c of a phases the first controling winding 31a, b phase the first controling winding 31b, c phase) head/end be followed successively by
a31/x31、b31/y31、c31/z31, the second controling winding (be followed successively by a phases the second controling winding 32a, b the second controling winding of phase 32b,
The controling winding 32c of c phases second) head/end be followed successively by a32/x32、b32/y32、c32/z32, the 3rd controling winding (is followed successively by a
The controling winding 33c of the 3rd the 3rd controling winding 33b, c phase of controling winding 33a, b phase of phase the 3rd) head/end be followed successively by a33/
x33、b33/y33、c33/z33。
As shown in figure 1, winding of the series transformer module 27 per phase include a source side winding and multiple current transformer side around
(the present embodiment sets three current transformer side windings to group, is followed successively by the first current transformer side winding, the second current transformer side winding, the 3rd
Current transformer side winding).In each phase, source side winding (is followed successively by a phase source side winding 5a, b phase source side winding 5b, c phase source side windings
Head 5c)/end is followed successively by a5/x5、b5/y5、c5/z5；First current transformer side winding (be followed successively by a phases the first current transformer side around
Group 41a, b the first current transformer of phase side winding 41b, c the first current transformer of phase side winding 41c) head/end be followed successively by a41/x41、
b41/y41、c41/z41, the second current transformer side winding (be followed successively by the second current transformer of a phases side winding 42a, b phase the second current transformer side around
Group 42b, c the second current transformer of phase side winding 42c) head/end be followed successively by a42/x42、b42/y42、c42/z42, the 3rd current transformer
Side winding (be followed successively by the current transformer side of the 3rd current transformer side winding 43b, c phase of the 3rd current transformer side winding 43a, b phase of a phases the 3rd around
Group 43c) head/end be followed successively by a43/x43、b43/y43、c43/z43。
As shown in Fig. 2 the converter module of the hybrid distribution transformer of Multiple coil magnetic integrated-type of the present invention includes
Multiple AC-DC-AC current transformers (three are provided with the present embodiment, be in practice by AC-DC-AC current transformers rated power and
Distribution transformer compensation capacity determines number), it is followed successively by an AC-DC-AC current transformers 101 (Fig. 2 a), the 2nd AC-DC-AC and becomes
Stream device 102 (Fig. 2 b), the 3rd AC-DC-AC current transformers 103 (Fig. 2 c).Each AC-DC-AC current transformer is by dc-link capacitance
231st, 232,233, current control current transformer 211,212,213, voltage control variable stream device 221,222,223, current control unsteady flow
Device side three-phase low-pass filter 241,242,243 and voltage control variable stream device side three-phase low-pass filter 251,252,253 are constituted.
Each bridge arm (three-phase bridge arm) of current control current transformer 211,212,213 and voltage control variable stream device 221,222,223 is by work(
Rate switch 16 is constituted.Each dc-link capacitance 231,232,233 is connected by two capacitance identical electric capacity 151,152,153
Form, and by electric capacity midpoint J1、J2、J3Draw, to provide zero sequence compensation path.Each three-phase low-pass filter is by filtered electrical
Sense 612,634,656,712,734,756, filter capacitor 171,172,173,181,182,183 and current-limiting resistance 191,192,
193rd, 201,202,203 constitute.In current control current transformer side three-phase low-pass filter 241,242,243, filter inductance 612,
634th, 656 one group of three-phase terminal accesses the three of the current control current transformer 211,212,213 of same AC-DC-AC current transformers
Phase bridge arm midpoint, another group of three-phase terminal is then as the current control current transformer side three-phase output end of the AC-DC-AC current transformers
Son (is followed successively by Fig. 2 a~c：u31/v31/w31、u32/v32/w32、u33/v33/w33)；Voltage control variable stream device side three-phase low pass
In wave filter 251,252,253, one group of three-phase terminal of filter inductance 712,734,756 accesses same AC-DC-AC current transformers
Voltage control variable stream device 221,222,223 three-phase bridge arm midpoint, another group of three-phase terminal is then as the AC-DC-AC unsteady flows
Voltage control variable stream device side three-phase output end of device (is followed successively by Fig. 2 a~c：u41/v41/w41、u42/v42/w42、u43/
v43/w43).In same AC-DC-AC current transformers, current control current transformer 211,212,213 and voltage control variable stream device 221,
222nd, 223 direct current side bus link together, common bus electric capacity 231,232,233；In current control current transformer side, filtering
One group of three-phase terminal of electric capacity 171,172,173 is connected with one group of three-phase terminal of current-limiting resistance 191,192,193, filter capacitor
171st, 172,173 another group of three-phase terminal then accesses corresponding current control current transformer side three-phase output end (in Fig. 2 a~c
In be followed successively by：u31/v31/w31、u32/v32/w32、u33/v33/w33), another group of three-phase terminal of current-limiting resistance 191,192,193 is then
Electric capacity midpoint J is accessed after connecting together1、J2、J3；Voltage control variable stream device side, one group of filter capacitor 181,182,183
Three-phase terminal is connected with one group of three-phase terminal of current-limiting resistance 201,202,203, another group three of filter capacitor 181,182,183
Phase terminal then accesses corresponding voltage control variable stream device side three-phase output end and (is followed successively by Fig. 2 a~c：u41/v41/w41、
u42/v42/w42、u43/v43/w43), another group of three-phase terminal of current-limiting resistance 201,202,203 accesses electricity after then connecting together
Hold midpoint J1、J2、J3。
In Fig. 1, a, b, c phase first winding 1a, 1b, the sub- A of head end of 1c1、B1、C1Access three phase network, the sub- X in end1、Y1、
Z1Respectively with the sub- a of head end of a, b, c phase source side winding 5a, 5b, 5c5、b5、c5Correspondence be connected, a, b, c phase source side winding 5a, 5b,
The sub- x in end of 5c5、y5、z5The earth is accessed after being linked to be neutral point.The sub- a of head end of a, b, c phase Secondary Winding 2a, 2b, 2c2、b2、c2
Access load, the sub- x in end2、y2、z2It is linked to be neutral point to be connected with load midpoint (neutral point of star-like load).
AC-DC-AC current transformers, the number per phase control winding, per phase current transformer side winding is equal (is in the present embodiment
Three).The three-phase output of the filter inductance of current control current transformer side low pass filter is connected in each AC-DC-AC current transformer
Terminal is connected with head end of a controling winding of corresponding phase, and end of each controling winding is then linked to be neutral point and is followed by respectively
Enter the dc-link capacitance midpoint of corresponding A C-DC-AC current transformers.Specially：Controling winding 31a, 31b of a, b, c phase first, 31c
The sub- a of head end31、b31、c31With output end (the i.e. u of the current control current transformer side of an AC-DC-AC current transformers 10131/v31/
w31) be connected, the sub- x in end31、y31、z31Link together and corresponding with dc-link capacitance 231 in an AC-DC-AC current transformers
Electric capacity midpoint J1It is connected；The sub- a of head end of controling winding 32a, 32b of a, b, c phase second, 32c32、b32、c32With the 2nd AC-DC-
Output end (the i.e. u of the current control current transformer side of AC current transformers 10232/v32/w32) be connected, the sub- x in end32、y32、z32It is connected to
Together and electric capacity midpoint J corresponding with dc-link capacitance 232 in the 2nd AC-DC-AC current transformers2It is connected；A, b, c phase the 3rd is controlled
The sub- a of head end of winding 33a, 33b, 33c processed33、b33、c33With the current control current transformer side of the 3rd AC-DC-AC current transformers 103
Output end (i.e. u33/v33/w33) be connected, the sub- x in end33、y33、z33Link together and with direct current in the 3rd AC-DC-AC current transformers
The corresponding electric capacity midpoint J of bus capacitor 2333It is connected.Voltage control variable stream device side low pass is connected in each AC-DC-AC current transformer
Three-phase output end of the filter inductance of wave filter is then connected with head end of a current transformer side winding of corresponding phase, each unsteady flow
End of device side winding is then linked to be the dc-link capacitance midpoint of access corresponding A C-DC-AC current transformers after neutral point respectively.Tool
Body is：The sub- a of head end of the first current transformer of a, b, c phase side winding 41a, 41b, 41c41、b41、c41With an AC-DC-AC current transformers
Output end (the i.e. u of 101 voltage control variable stream device side41/v41/w41) be connected, the sub- x in end41、y41、z41Link together and with
The corresponding electric capacity midpoint J of dc-link capacitance 231 in first AC-DC-AC current transformers 1011It is connected；The current transformer of a, b, c phase second
The sub- a of head end of side winding 42a, 42b, 42c42、b42、c42With the voltage control variable stream device side of the 2nd AC-DC-AC current transformers 102
Output end (i.e. u42/v42/w42) be connected, the sub- x in end42、y42、z42Link together and with the 2nd AC-DC-AC current transformers 102 in
The corresponding electric capacity midpoint J of dc-link capacitance 2322It is connected；The head end of a, b, c phase the 3rd current transformer side winding 43a, 43b, 43c
Sub- a43、b43、c43With output end (the i.e. u of the voltage control variable stream device side of the 3rd AC-DC-AC current transformers 10343/v43/w43) phase
Even, the sub- x in end43、y43、z43Link together and corresponding with dc-link capacitance 233 in the 3rd AC-DC-AC current transformers 103
Electric capacity midpoint J3It is connected.
As shown in figure 3, the magnetic integration apparatus of the hybrid distribution transformer of Multiple coil magnetic integrated-type of the present invention, by each
Winding is wound on a secondary complete iron core and is formed.The iron core is by a secondary three-phase three-limb iron core and a secondary three-phase and five-pole
Formula iron core is integrated to be formed, including three iron yokes, three upper core posts, five lower core limbs.Three iron yokes are followed successively by：Top iron yoke
8th, middle part iron yoke 9, bottom iron yoke 10.Three upper core posts are respectively：In a phase upper core post 11a, b phase upper core post 11b, c phases
Iron core column 11c.Five lower core posts are respectively：A phase lower core post 12a, b phase lower core post 12b, c phase lower core posts 12c,
One alternate lower core post 13, the second alternate lower core post 14.Three upper ends of upper core post are connected with top iron yoke 8, lower end with
Middle part iron yoke 9 is connected；Five upper ends of lower core post are connected with middle part iron yoke 9, and lower end is connected with bottom iron yoke 10, i.e. upper core
Post shares middle part iron yoke 9 with lower core post.
As shown in figure 3, in per phase, first winding, Secondary Winding, three controling windings use laminar winding, and by outer
It is wound on upper core post to interior.The filter inductance of the current control current transformer side low pass filter of each AC-DC-AC current transformer
Per the two parts for being mutually split as equal turn numbers, after this two parts differential concatenation, lap wound is in correspondence phase upper core post from top to bottom
On, and (filter inductance splits and is specially within most inner side winding：In first AC-DC-AC current transformers 101, filter inductance
612 a, b, c phase inductance coil be split as respectively the circles such as a phase inductance coils section 61a, 62a, b phase inductance coil etc. circle section 61b,
The circles such as 62b, c phase inductance coil section 61c, 62c；In 2nd AC-DC-AC current transformers 102, a, b, c phase inductance of filter inductance 634
Coil is split as circle section 63b, 64b, c phase inductance coil such as the circles such as a phase inductance coils section 63a, 64a, b phase inductance coil etc. respectively
Circle section 63c, 64c；In 3rd AC-DC-AC current transformers 103, a, b, c phase inductance coil of filter inductance 656 are split as a phases respectively
Circle section 65c, the 66c such as circle section 65b, 66b, c phase inductance coil such as the circles such as inductance coil section 65a, 66a, b phase inductance coil).
As shown in figure 3, per in phase, source side winding, three current transformer side windings use laminar winding, and from outside to inside around
System is on lower core post.The filter inductance of the voltage control variable stream device side low pass filter of each AC-DC-AC current transformer is per mutually equal
Two parts of equal turn numbers are split as, after this two parts differential concatenation, lap wound is in correspondence phase lower core post from top to bottom, and is located at
(filter inductance splits and is specially within most inner side winding：In first AC-DC-AC current transformers 101, a, b, c of filter inductance 712
Phase inductance coil is split as circle section 71b, the 72b such as the circles such as a phase inductance coils section 71a, 72a, b phase inductance coil, c phase inductances respectively
The circles such as coil section 71c, 72c；In 2nd AC-DC-AC current transformers 102, a, b, c phase inductance coil of filter inductance 734 are torn open respectively
Be divided into the circle section 73c such as the circles such as a phase inductance coils section 73a, 74a, b phase inductance coil etc. circle section 73b, 74b, c phase inductance coil,
74c；In 3rd AC-DC-AC current transformers 103, a, b, c phase inductance coil of filter inductance 756 are split as a phase inductance coils respectively
Deng circle section 75c, 76c such as circle section 75b, 76b, c phase inductance coils such as circle section 75a, 76a, b phase inductance coil).
The alternate lower core limb 14 of the first alternate lower core limb 13, second is used to provide magnetic conduction branch road for zero sequence fluxes,
When offset voltage is asymmetrical three-phase voltage, it will zero sequence fluxes occur, now, zero sequence fluxes will be by the first alternate lower iron
The alternate lower core limb 14 of stem 13, second constitutes the respective closed path of three-phase with other three lower core limbs, so as to realize zero
Sequence voltage is compensated.
Each filter inductance equalization circle in the present invention splits, and differential concatenation is approximate with each winding and other filter inductances
Decoupling, the functional characteristic of inductance is realized using leakage field, and the linearity is good.Put down because each winding current of concentric coiling meets magnetic potential
Weighing apparatus principle, therefore each controling winding and each current transformer side winding only transmit the portion capacity in total capacity, so as to effectively drop
The power requirement of low single current transformer, the overall compensation capacity of lifting device.Carrier phase technology can be used between each current transformer,
So that the high frequency harmonic components of first winding or source side winding electric current breaker in middle frequency integral multiple time are substantially reduced.Multiple unsteady flows
Device unit substantially belongs to parallel relationship, and is isolated each other by multiwinding transformer, therefore is allowed in compensation capacity
In the case of, even if there is unit to break down, remaining element can still continue to complete control function, be so as to greatly promote
The reliability of system.The AC-DC-AC converter cells of multi-group isolation can provide the dc bus of multigroup different voltage class,
Quite facilitate for distributed power source access system.
Controling winding, current transformer side winding, AC-DC-AC current transformer three's numbers are identical in the present invention, each AC-DC-AC
The current control current transformer of current transformer accesses corresponding controling winding and realizes power network current control by magnetic potential balance principle and electric
Voltage-controlled current transformer processed accesses current transformer side winding and completes load voltage control.Hybrid distribution transformer is realized using integrated magnetic
The Integrated design of each discrete magnetic part of device can fully improve the utilization rate of ferromagnetic material, reduce the overall volume of equipment.Using more around
Group transformer accesses multiple AC-DC-AC converter cells and on the one hand can lift the control capability of hybrid distribution transformer, reduces
The higher harmonic content of current transformer, is provided out multiple difference voltage class and the dc source being isolated from each other.On the other hand it is many
Individual current transformer can with cooperation, it is standby each other, realize that faults-tolerant control, so as to not only improve the reliability of equipment, and increases
The control function of strong hybrid distribution transformer.
In a word, the present invention uses integrated magnetic, and a kind of novel mixed distribution is proposed based on multiwinding transformer structure
Transformer, control capability bigger, reliability is stronger, control function more horn of plenty, and the intellectuality for realizing power distribution network has weight
Want meaning.
Claims (10)
1. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type, it is characterised in that：The distribution transformer includes current transformer mould
Block and the multiwinding transformer body of three-phase three-limb main transformer and three-phase five-limb series transformer is integrated with, it is described many
Winding transformer body includes the main transformer module (26) and series transformer module (27), the unsteady flow that primary side winding is connected
Device module includes the AC- that multiple vice-side windings with main transformer module (26) and series transformer module (27) are respectively connected with
All windings of DC-AC converter cells, main transformer module (26) and series transformer module (27) are arranged at same iron core
On.
2. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 1, it is characterised in that：Each AC-
DC-AC converter cells include current control current transformer, voltage control variable stream device and by current control current transformer and voltage control
The shared dc-link capacitance of current transformer processed；Current control current transformer, the respective AC of voltage control variable stream device are connected to low
Bandpass filter.
3. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 1, it is characterised in that：Each AC-DC-
Carrier phase technology is used between AC converter cells to be carried out signal modulation to reduce the higher harmonic content in compensation electric current.
4. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 1, it is characterised in that：The main transformer
Winding of the depressor module (26) per phase includes a first winding, a Secondary Winding and multiple controling windings, and the series connection becomes
Winding of the depressor module (27) per phase includes a source side winding and multiple current transformer side windings；First winding head end accesses electricity
Net, the source side winding head end of first winding end and corresponding phase is connected, and each phase source side winding end is connected together and by neutral point
Access the earth；The head end of each phase Secondary Winding is drawn, and end is linked to be a neutral point, is formed the load of three-phase four-wire system pair of connecting wires and is supplied
Electricity；Each phase control winding uses the head end of wye connection, each phase to be respectively connected to corresponding A C-DC-AC changes with current transformer side winding
The current control current transformer output end and voltage control variable stream device output end of device unit are flowed, neutral point accesses respective AC-DC-AC
Converter cell dc-link capacitance midpoint.
5. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 4, it is characterised in that：It is described once
Winding undertakes power network rated voltage, and source side winding undertakes voltage pulsation component, by controlling each AC-DC-AC converter cells
Voltage control variable stream device realizes load voltage stability contorting.
6. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 4, it is characterised in that：The AC-
The current control current transformer of DC-AC converter cells is controlled as current source, common based on each controling winding of magnetic potential balance principle
Compensation electric current is shared to realize the sinusoidal symmetrical control of power network current.
7. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 4, it is characterised in that：The AC-
DC-AC converter cells, every phase control winding and equal, each AC-DC-AC current transformer list per the number of phase current transformer side winding
Unit accesses corresponding controling winding and current transformer side winding, wherein, current control current transformer Access Control winding, and voltage control
Current transformer processed accesses current transformer side winding；Each AC-DC-AC converter cells are isolated from each other, separate, externally provide it is multiple that
The dc source of this isolation.
8. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 1, it is characterised in that：The iron core
Including top iron yoke (8), middle part iron yoke (9), bottom iron yoke (10), upper core post and lower core limb, the upper core post connection
Between top iron yoke (8) and middle part iron yoke (9), the lower core limb be connected to middle part iron yoke (9) with bottom iron yoke (10) it
Between, upper core post shares middle part iron yoke (9) with lower core post.
9. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 8, it is characterised in that：The lower iron
Stem uses pentastyle structure, for zero sequence fluxes provide magnetic conduction branch road.
10. a kind of hybrid distribution transformer of Multiple coil magnetic integrated-type according to claim 1, it is characterised in that：The master
The winding of transformer module (26) and series transformer module (27) per phase uses laminar winding, is wound on this phase with one heart respectively
Iron core column on；Output inductor of each AC-DC-AC converter cells per phase is split as two parts of equal turn numbers, instead
After to series connection, lap wound is in the iron core column of this phase one by one；Winding of the main transformer module (26) per phase is from outside to inside successively
It is the current control current transformer output inductor of first winding, Secondary Winding, controling winding and AC-DC-AC converter cells；
Winding of the series transformer module (27) per phase is followed successively by source side winding, current transformer side winding and AC-DC-AC from outside to inside
The voltage control variable stream device output inductor of converter cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710167121.9A CN106887957B (en) | 2017-03-20 | 2017-03-20 | A kind of hybrid distribution transformer of Multiple coil magnetic integrated-type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710167121.9A CN106887957B (en) | 2017-03-20 | 2017-03-20 | A kind of hybrid distribution transformer of Multiple coil magnetic integrated-type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106887957A true CN106887957A (en) | 2017-06-23 |
| CN106887957B CN106887957B (en) | 2019-08-23 |
Family
ID=59180952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710167121.9A Active CN106887957B (en) | 2017-03-20 | 2017-03-20 | A kind of hybrid distribution transformer of Multiple coil magnetic integrated-type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106887957B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919216A (en) * | 2017-11-01 | 2018-04-17 | 西安交通大学 | A kind of magnetic integrates hybrid distribution transformer |
| CN109802422A (en) * | 2019-02-15 | 2019-05-24 | 全球能源互联网研究院有限公司 | A kind of flexibility looped network interconnect device and system |
| CN110086355A (en) * | 2019-04-29 | 2019-08-02 | 西安交通大学 | A kind of high frequency control offset-type controllable AC distribution transformer |
| CN112820524A (en) * | 2021-02-04 | 2021-05-18 | 东莞南方半导体科技有限公司 | Multi-phase transformer and rectifier system |
| CN113497446A (en) * | 2021-01-09 | 2021-10-12 | 华北电力大学（保定） | Power flow control topological circuit of single-phase electromagnetic series-type power transmission line with voltage class of 110kV or above |
| CN113541145A (en) * | 2021-01-09 | 2021-10-22 | 华北电力大学（保定） | Power flow control topological circuit of three-phase electromagnetic series-type power transmission line with voltage class of 110kV or above |
| CN115331930A (en) * | 2022-08-22 | 2022-11-11 | 南京大全变压器有限公司 | Magnetic integration hybrid distribution transformer with simple structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545171A (en) * | 2011-12-22 | 2012-07-04 | 江苏宏安变压器有限公司 | Multi-winding adjustable reactor and single phase grounding fault clearing method thereof |
| CN104283404A (en) * | 2013-03-13 | 2015-01-14 | 沃尔泰拉半导体公司 | Coupled Inductors With Non-Uniform Winding Terminal Distributions |
| CN204632550U (en) * | 2015-05-29 | 2015-09-09 | 天津市鲲鹏电子有限公司 | A kind of three-phase five-limb wideband contravariant transformer |
| CN205542345U (en) * | 2016-04-27 | 2016-08-31 | 兰州交通大学 | Magnetic integration device of transformer type controllable electric reactor |
| CN106411203A (en) * | 2016-11-07 | 2017-02-15 | 西安交通大学 | Magnetic control type time-division multiplexing integrated intelligent power distribution transformer |
| CN107210123A (en) * | 2014-08-07 | 2017-09-26 | 达特茅斯学院托管理事会 | Magnetic devices including low AC resistance paper tinsel winding and Gapped magnet core |
-
2017
- 2017-03-20 CN CN201710167121.9A patent/CN106887957B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545171A (en) * | 2011-12-22 | 2012-07-04 | 江苏宏安变压器有限公司 | Multi-winding adjustable reactor and single phase grounding fault clearing method thereof |
| CN104283404A (en) * | 2013-03-13 | 2015-01-14 | 沃尔泰拉半导体公司 | Coupled Inductors With Non-Uniform Winding Terminal Distributions |
| CN107210123A (en) * | 2014-08-07 | 2017-09-26 | 达特茅斯学院托管理事会 | Magnetic devices including low AC resistance paper tinsel winding and Gapped magnet core |
| CN204632550U (en) * | 2015-05-29 | 2015-09-09 | 天津市鲲鹏电子有限公司 | A kind of three-phase five-limb wideband contravariant transformer |
| CN205542345U (en) * | 2016-04-27 | 2016-08-31 | 兰州交通大学 | Magnetic integration device of transformer type controllable electric reactor |
| CN106411203A (en) * | 2016-11-07 | 2017-02-15 | 西安交通大学 | Magnetic control type time-division multiplexing integrated intelligent power distribution transformer |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919216A (en) * | 2017-11-01 | 2018-04-17 | 西安交通大学 | A kind of magnetic integrates hybrid distribution transformer |
| WO2019085140A1 (en) * | 2017-11-01 | 2019-05-09 | 西安交通大学 | Magnetic integrated hybrid power distribution transformer |
| CN109802422A (en) * | 2019-02-15 | 2019-05-24 | 全球能源互联网研究院有限公司 | A kind of flexibility looped network interconnect device and system |
| CN109802422B (en) * | 2019-02-15 | 2020-12-22 | 全球能源互联网研究院有限公司 | Flexible looped network interconnection device and system |
| CN110086355A (en) * | 2019-04-29 | 2019-08-02 | 西安交通大学 | A kind of high frequency control offset-type controllable AC distribution transformer |
| CN113497446A (en) * | 2021-01-09 | 2021-10-12 | 华北电力大学（保定） | Power flow control topological circuit of single-phase electromagnetic series-type power transmission line with voltage class of 110kV or above |
| CN113541145A (en) * | 2021-01-09 | 2021-10-22 | 华北电力大学（保定） | Power flow control topological circuit of three-phase electromagnetic series-type power transmission line with voltage class of 110kV or above |
| CN113541145B (en) * | 2021-01-09 | 2023-08-18 | 华北电力大学（保定） | 110kV and above voltage class three-phase electromagnetic series type transmission line current control topological circuit |
| CN113497446B (en) * | 2021-01-09 | 2023-08-18 | 华北电力大学（保定） | 110kV and above voltage class single-phase electromagnetic series type transmission line current control topological circuit |
| CN112820524A (en) * | 2021-02-04 | 2021-05-18 | 东莞南方半导体科技有限公司 | Multi-phase transformer and rectifier system |
| CN115331930A (en) * | 2022-08-22 | 2022-11-11 | 南京大全变压器有限公司 | Magnetic integration hybrid distribution transformer with simple structure |
| CN115331930B (en) * | 2022-08-22 | 2023-12-29 | 南京大全变压器有限公司 | Magnetic integration hybrid distribution transformer with simple structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106887957B (en) | 2019-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106887957B (en) | A kind of hybrid distribution transformer of Multiple coil magnetic integrated-type | |
| CN108832825B (en) | High power density's multiport power electronic transformer topology | |
| CN103441691B (en) | A kind of mode of resonance electronic power convertor and converter device | |
| CN104702114B (en) | The High Frequency Link bidirectional, dc transformer and its control method of a kind of switching capacity access | |
| CN103516230B (en) | Many level that bi-directional current controls balance solid-state transformer and its implementation mutually | |
| CN101572495B (en) | Multifunctional power electric transformer | |
| CN105305855B (en) | Three-phase isolation type bidirectional AC-DC converter and its control method | |
| CN201369679Y (en) | Electronic transformer for electric power line | |
| CN108242813B (en) | Control method of energy router for comprehensive treatment of electric energy quality and power optimization | |
| CN101795080A (en) | Three-phase power electronics transformer for power distribution | |
| CN107910892A (en) | A kind of energy router apparatus applied to intelligent distributed energy network | |
| CN106411203B (en) | A kind of magnet controlled time-sharing multiplex integrated intelligent distribution transformer | |
| CN109742780A (en) | The formula energy-storage system that distributes alternately based on Modular multilevel converter | |
| CN102904420A (en) | Multi-port current transformer | |
| CN107546983B (en) | A kind of high-power high no-load voltage ratio modularization two-way DC converter of isolated form | |
| CN110022077B (en) | Power composite type modular multi-level solid-state transformer topological structure for alternating current-direct current hybrid power distribution network | |
| CN106100361B (en) | A kind of ac-dc conversion circuit and electric power electric transformer | |
| CN108306324A (en) | Modularization centralized formula energy-storage system | |
| CN114710052A (en) | Electric energy router power module and electric energy router | |
| CN100571006C (en) | Superconducting energy storage bidirectional three-level soft switch DC/DC converter and control method thereof | |
| CN207426981U (en) | A kind of multi-channel parallel input and the power inverter of multiple series series output | |
| CN207010553U (en) | A kind of multiport hybrid power electronic transformer based on MMC | |
| CN100570766C (en) | External electric supply controllable reactor | |
| CN207939209U (en) | The energy router of power quality harnessed synthetically and power optimization | |
| CN107666254A (en) | Isolation type bidirectional DC/AC power supplys |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |