CN106057452A - Transformer capable of increasing impedance - Google Patents
Transformer capable of increasing impedance Download PDFInfo
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- CN106057452A CN106057452A CN201610583165.5A CN201610583165A CN106057452A CN 106057452 A CN106057452 A CN 106057452A CN 201610583165 A CN201610583165 A CN 201610583165A CN 106057452 A CN106057452 A CN 106057452A
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- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/16—Cascade transformers, e.g. for use with extra high tension
Abstract
The invention provides a transformer capable of increasing impedance. The transformer comprises a main transformer part, an in-series transformer part, a switch and an electric reactor, wherein the electric reactor and the switch are taken as an impedance regulator; when the transformer needs the small impedance, the switch is flipped down, and the electric reactor is disconnected; when the transformer needs the large impedance, the switch is flipped up, the electric reactor is in an in-series connection with the transformer, and the impedance of the transformer increases; and if the electric reactor is controllable, the impedance of the transformer can be adjusted at will. The design will become a revolutionary change in high-voltage and ultra-high voltage power transmission systems. The transformer has the advantages that system safety is greatly enhanced, and system cost is reduced; and current limiting, current stabilization, filtering, damping and the like of the system will become controllable. The transformer can be applied to high-voltage, extra high-voltage and ultrahigh-voltage AC and DC power transmission as well as other electric power systems in need of the current limiting, current stabilization, filtering and damping.
Description
Technical field
The present invention is a kind of transformator, resistive, resistance sense, capacitance-resistance power system in apply.Can range of application contain
Cover such as industrial and agricultural production, scientific experiments, electric power transmission and various power systems etc..
Background technology
For ensureing system reliability of operation, limiting its short circuit current, effective measure is the short of raising transformator
Road resistance value.This most many developed countries tend to the reason using high-impedance transformer already.
Use the power system improving transformer impedance to have a following Some features: (1) when electrical network is short-circuited accident,
Short circuit current by high-impedance transformer He other power equipment is less, and corresponding short-circuit electromagnetic force and heating effect of current also can
Reduce.This not only can improve the reliability of electrical network, and that can also reduce the electrical equipments such as line switching cut-offs capacity simultaneously.(2)
Use high-impedance transformer, the current-limiting reactor being separately provided for limiting system short-circuit electric current can be cancelled, thus can reduce
Construction cost, minimizing floor space.
The power system improving transformer impedance is used to have following construction features.The method improving transformer impedance is general
There are two kinds.The first is double winding or the three-winding transformer knot using common transformator conventional structure namely single device body
Structure, by adjusting core-diameter and winding parameter, the most also to take to split the measures such as winding, reach to improve transformer impedance
Purpose, though the cost of increase is many, but acceptable, this is also the most the most frequently used scheme.The second is utilized in
The structure arranging reactor (the most so-called built-in reactor) on transformator reaches to improve the purpose of transformator entrance reactance, but
Because the reactor cost sealed in is the most high, the most few application.
The key problem in technology using common transformator conventional structure to improve transformer impedance is that the leakage field to winding controls
And corresponding loss control and temperature rise control.It is known that when transformator accesses electrical network and applies rated voltage, at iron core
Middle will have main flux to flow through.After transformer belt load running, load current by internal at first and second winding of transformator and
Region produces leakage magnetic flux about, and these leakage magnetic fluxs interlink with first and second winding and form the short-circuit impedance of transformator.Thus,
If improving the setting of transformer impedance drop, the leakage magnetic flux having comparison many with regard to inevitable requirement interlinks with first and second winding.For
For high-power transformer, it is that the stray loss in winding and structural member substantially increases that leakage magnetic flux increases the outstanding problem brought,
The temperature rise of corresponding site improves therewith.This stray field to transformator that just requires structurally to adopt an effective measure is controlled,
Prevent winding and structural member from producing hot-spot, it is ensured that the safe operation of transformator.
Therefore present stage, it is badly in need of a kind of fractionation winding that need not and just can improve the transformator of impedance, to overcome fractionation winding
The stray loss, the temperature rise that produce drastically raise, hot-spot and the transformator cost of increase.
The second is utilized on transformator arranging the structure of reactor (the most so-called built-in reactor scheme) and reaches
Improve the purpose of transformator entrance reactance, use built-in reactor Technology design to be usually the high pressure or low at two-winding transformer
Current-limiting reactor on pressure winding, but reactor voltage is high, capacity is big, cost is high, complex for insulation.
It is additionally current-limiting reactor on three-winding transformer, it is simply that on a winding in three winding, be connected in series one
Reactor, reaches to improve the purpose of certain two pairs of resistance value, but when the winding of current-limiting reactor screws on or do not comes into operation, the most right
The impedance of transformator increases not effect, even and come into operation, the winding that need not increase impedance is also increased impedance, this
This method will be made ineffective, and the reason adding cost is not the most applied at present.Assume that certain three-winding transformer is at volume
Three pairs of resistance values when determining tapping voltage position are respectively uHM=14%, uML =23%, uHL=37%.From to three pairs of impedance regulations
It is found that u in the analysis of valueHMSubstantially normal national Specification value, and uMLAnd uHLValue be then in arm's length standard
About adding 15% again on the basis of setting.So, it is the reactor of 15% by a resistance value of connecting in low pressure winding, just
Common three-winding transformer structure can be used to meet the requirement of specified impedance value.
Present stage, the shortcoming of the high-impedance electric power transformer of employing built-in reactor is: firstly, because present transformator
Being substantially the single device body transformer scheme of employing, reactor capacity is big, and voltage is high, complex for insulation, in most cases needs employing high
Expensive air reactor.Secondly, what reactor adjusted is the whole capacity of transformator, and therefore reactor capacity is big, and voltage is high, uses
Stray field produced by reactor is shielded by higher cost, could reduce its stray loss produced in structural member,
Prevent hot-spot.Therefore, present stage uses the few of this scheme.
Now it is badly in need of a kind of low capacity, low-voltage, the built-in reactor scheme of low price.Particularly to find a kind of permissible
Replace and reach to improve the three winding power transformer built-in reactor scheme of certain two pairs of winding impedance by one winding of increase.
From system stability, the short-circuit reactance of power system is a crucial value, and power system limits short circuit and holds
One of major measure of amount is to use high-impedance transformer and current-limiting reactor.Increase reactance and can improve the stability of system, limit
The corresponding short-circuit electromagnetic force of short circuit current processed and heating effect of current also can reduce, and can also reduce line switching etc. simultaneously and electrically set
Standby cut-offs capacity.But high impedance increases by electric network reactive-load, efficiency is substantially reduced, the reactive power that transformator consumes is typically about
The 10%～15% of its rated capacity, when supply voltage is higher than the 10% of rated value, due to the impact that magnetic circuit is saturated, idle
Power will increase quickly.When supply voltage is less than rated value, reactive power reduces the most accordingly and makes their power factor
Increase.But supply voltage reduction can affect the normal work of electrical equipment.So, it should take measures to make power system
Supply voltage keeps stable as far as possible.
If having a kind of transformator can be Low ESR under normal operating conditions, when running into sudden short circuit or other needs
Current limliting, current stabilization, filter, the effect such as damping time, even transformator can become high impedance ultra-high-impedance transformator moment, and power
Voltage is constant, can play an important role high pressure, supertension, extra-high-voltage alternating current electrical network.
Tradition string modified tone pressure transformer is primarily adapted for use in the furnace transformer of more than 10000KVA, and rectifier transformer the most occasionally has
Seeing it, it is traditional furnace transformer form, but high because of its cost and smelting technique development seldom uses.
Tradition string modified tone pressure transformer is applied in electric furnace smelting system or DC electrolysis system, uses two transformer group
Becoming, one is main transformer (low voltage voltage is constant), and another becomes (low voltage voltage is adjustable) for string, needs utilization to be arranged on main transformer
On independent tap-changing windings give string become high-pressure side power, main transformer and string become low pressure windings in series together with, employing splayed configuration line
Coil structures, main transformer low pressure winding voltage is constant, and string step-down pressure winding voltage is adjustable, causes two the low pressure windings being cascaded
Voltage changes, thus changes main, the resultant voltage of string step-down pressure winding, and main transformer includes high pressure winding, low pressure winding, pressure regulation
Winding, string change includes high pressure winding, low pressure winding, applies in low-voltage, high-current system.Its with power transformer design concept on
Maximum be not both string modified tone pressure transformer assume winding of main transformer input voltage be constant, main transformer and string
Connection transformator Secondary Winding output voltage be change, the design concept of power transformer be input voltage be change, and
Output voltage is constant.But its have an advantage be exactly tap-changing windings and string uprise pressure winding voltage and current combination be permissible
Adjust.
Tradition string modified tone pressure transformer i.e. double body transformator, owing to cost is prohibitively expensive, manufacturing process is complicated, entirely
State can the skilled industrial worker of coiling pitch of the laps probably less than thirty or forty people and older.Present stage, even if now in electric furnace smelting
Refining system, electrolysis system is seldom applied.
Being badly in need of now a kind of low cost, simple in construction, manufacturing process is simple, and its tap-changing windings and string can be utilized to uprise pressure
The voltage and current combination of winding is adjustable in advantage, makes cost be even below double devices of double winding list device body transformator
Body transformer device structure, and preferably can apply to any power system.
Reactor is the power equipment that power system is conventional, important, act primarily as current limliting, current stabilization, filter, damping etc. is made
With.Voltage pulsation is required the strictest by high-voltage and ultra-high extra high voltage line, it is also desirable to increases reactor and suppresses.Simultaneously some
Require under occasion that reactor can carry out reactance control, adjust, suppress fluctuation and the short circuit current etc. of voltage.Wherein there is a kind of electricity
Anti-device is controlled reactor, and it is divided into again magnet controlled and two kinds of forms of grading control (reactor+electric capacity).General dry reactor
As low tension reactor (reactor of general electric substation secondary side assembling is referred to as low tension reactor).And liquid immersed reactor is typically made
For high voltage reactor.Reactor can be divided into again: air reactor, iron-core reactor.
Switchgear is to close or cut-off circuit when action, is connection or insulating power supply, the function of its essence time motionless
The effect of " impedance transformer ", will in circuit impedance of certain point by 0 → ∞ or ∞ → 0." electric arc " is then that this is rapid
Conversion process is difficult to avoid that but also it is indispensable to cut-off element.The contact machinery that has in high-voltage great-current circuit is opened
For pass, only electric arc just can complete conversion, has a problem in that and how to limit its disadvantageous effect.Switch refer to work in generating,
Transmission of electricity, distribution and with the various high power switch electrical equipment of electric unit, the operation of power system is played and controls and protect by they
Effect.Switchgear generally includes element and complete set electrical equipment two large divisions.Element includes chopper, disconnecting switch, load
Beginning, fuse, low-voltage automatic switche etc.；Complete set electrical equipment includes various switch cubicle, gas-filling cabinet, ring main unit, box type transformation
Stand and all kinds of gas insulated metal enclosed swit chgear.
Along with the development of modern power electronics technology, the concept of electronic power switch device is evolving and expands
Greatly, it will more novel switch occurs to adapt to modernize the operation needs of electrical network.
In electricity, transmission of electricity, distribution and big use electric unit, switch is a kind of high power switch electrical equipment, a kind of complete
Unit equipment, if there being a kind of transformator, when switch works on this transformator, can be with low-voltage, the opening of low capacity
Close and go to control and protect large-scale, the power system of high pressure even extra-high voltage.At this, switch has been the electricity of impedance transformation effect
The components and parts of ductility limit system and turn-on power loss and equipment.
In original power system, a kind of method having transition impedance, is to be become by the increase and decrease of AC voltage adjusting electrical switch
The number of turn of depressor tap-changing windings, regulates impedance by the increase and decrease of transformer voltage, and its disadvantage is when resistance trimming is anti-, transformation
Device output voltage changes, if system voltage is reduced to less than 60%, system may cannot use by parallel off, is now badly in need of one not
Adjust the method that voltage just can change impedance.
Summary of the invention
A kind of transformator principal character that can improve impedance: main transformer part (abbreviation main transformer), including first once around
Group, the first tap-changing windings and one or more first Secondary Winding；And series transformer part (be called for short string become), including the
Two windings and one or more second Secondary Winding, and or include the first switch and the first reactor.Wherein, described
Each winding in one windings or described first Secondary Winding is gone here and there respectively with each winding in described second Secondary Winding
Connection, described first tap-changing windings is connected with described the second windings.Wherein, described a kind of transformator that can improve impedance is defeated
Go out the voltage of described the first windings that voltage is described main transformer part or described first Secondary Winding plus or deduct
Described series transformer part with described the first windings or described first secondary windings in series described the second two times around
The voltage of group.Wherein, the of the first tap-changing windings of described first reactor and described main transformer or described series transformer
Two windings in series.Wherein, the first switch is in parallel with the first reactor.
The Secondary Winding that main transformer or string become can divide the Secondary Winding that multiple electric pressure is identical or different.Series connection becomes
Depressor can be by two composition described above, it is possible to connect the most one by one with the different secondary winding of a main transformer.Main transformer one
The Secondary Winding series voltage-regulating respectively that the Secondary Winding of secondary winding or division can be split with one or more string variation respectively.
Two or more transformators are synthesized a voltage by two or more windings in series each other, thus change this
The output voltage of two or more transformators, i.e. belongs to a kind of transformator that can improve impedance of this patent definition.
Main transformer can replace with electrical network or power supply, and main transformer Secondary Winding can also use electrical network, power supply to substitute.
The main column portion of single-phase other post adjustable transformer is exactly main transformer part, and other post part is exactly series transformer portion
Point, now the second winding of series transformer does tap-changing windings.
General main transformer by winding, Secondary Winding, a tap-changing windings or makes three side windings form, it is possible to by once around
Group, tap-changing windings forms, it is possible to by a winding, and Secondary Winding forms, and string change is made up of winding, a Secondary Winding, and string becomes
One time winding can also be tertiary winding or use as tap-changing windings, and string becomes Secondary Winding can also be made as tap-changing windings
With.It practice, the theory of modern transformator is a no matter winding or Secondary Winding can possess voltage regulation function.
A kind of transformer output voltage formulae express that can improve impedance for (output voltage, main transformer output voltage, for
Series transformer output voltage), range of regulation can be between 0-100%.
A kind of sharpest edges of the transformator that can improve impedance be switch and reactor only need to control go here and there varying capacity the most permissible
Control whole transformator total capacity, change string time variant voltage and just can change the output voltage of whole transformator total capacity.Even if pressure regulation
Scope is 100%, and string varying capacity is also the half of transformator total capacity, and tap-changing windings voltage, electric current are permissible in principle
Combination in any, this alternatively switchs, the voltage of reactor, currents combination can be optional, it is simple to select a safety coefficient height,
The reactor of low cost and switch.
The transformer device structure that the present invention a kind of improves impedance is: by main transformer part, series transformer part, second
Reactor forms, and reactor is connected on the tap-changing windings of main transformer or a winding of series transformer, to increase system
Impedance, reach stabilisation systems, current limliting, current stabilization, filter, damp, the target of reactive-load compensation.
The transformer device structure that the present invention a kind of can improve impedance is: by main transformer part, series transformer part,
One switch and or second switch, the first reactor and or the second reactor composition, reactor be connected on the pressure regulation of main transformer around
On winding of group or series transformer, the first switch is in parallel with the first reactor.
A kind of transformator that can improve impedance, including main transformer part, including the first windings, the first pressure regulation around
Group and one or more first Secondary Winding；And series transformer part, including the second windings and one or more
Second Secondary Winding；And or include the one or both of the first switch or second switch；And or include the first reactor and
The one or both of the second reactor.In each winding in the first windings or the first Secondary Winding and the second Secondary Winding
Each winding connect respectively.First tap-changing windings is to the second winding power.Now the output voltage of transformator is main transformer
The first windings of depressor part or the voltage of the first Secondary Winding plus or deduct series transformer part with the 1st
The voltage of the second Secondary Winding of secondary winding or the first secondary windings in series.When main transformer part also includes the second tap-changing windings
Time, the first windings in series of the second tap-changing windings and main transformer part, the first winding voltages of regulation, adjust with second
Pressure winding coordinates pressure regulation.The first windings of main transformer part can be with in one or more first Secondary Winding
Or multiple winding self couplings, it is simply that the first one times winding i.e. can be with a first Secondary Winding self coupling, it is also possible to two or
Multiple first Secondary Winding self couplings；The output voltage using a kind of transformator that can improve impedance of self coupling structure is main transformer
The first winding voltages of part plus or deduct the voltage with the first Secondary Winding of the first winding self couplings and add
Or deduct series transformer part with the first windings or the voltage of the second Secondary Winding of the first secondary windings in series,
The portion voltage output principle not using self coupling structure in structure is constant.When having the first reactor and the first switch, first
The second windings in series of the first tap-changing windings of reactor and main transformer or series transformer, the first switch and the first electricity
Anti-device is in parallel.When including the second reactor, the first tap-changing windings of the second reactor and main transformer or series transformer
The second windings in series or parallel connections, increase the reactance value of transformator.When including second switch, second switch is connected to main transformer
Between the second windings of the first tap-changing windings of depressor and series transformer, now series transformer can use a circle or
The transformer structure of multiturn i.e. mutual inductance type series transformer.Particularly at three phase times, the second windings of series transformer
Using corner connection, its technical advantage becomes apparent from.
Above-mentioned a kind of transformator that can improve impedance, it is also possible to include two or more series transformer, two of which or
Second Secondary Winding of multiple series transformers is connected, wherein the most one by one with the second Secondary Winding of described main transformer part
The output voltage of a kind of transformator that can improve impedance is that the voltage of each the first Secondary Winding of main transformer adds or deducts
The voltage of each second Secondary Winding with each the first secondary windings in series of two or more series transformers.
A kind of transformator that can improve impedance includes: include the first windings of main transformer part and pressure regulation around
Group；Including series transformer part the second windings and one or more second Secondary Winding；And or include power supply, power supply
It is taken as the first Secondary Winding to use；And or include the first switch；And or include the first reactor and the second reactor
One or both.Now, the first one times winding is coupled by electromagnetic induction with tap-changing windings, the second windings and the second two times
Each winding in winding is coupled by electromagnetic induction.Tap-changing windings is to the second winding power.Power supply is with one or more
Second secondary windings in series, power supply the most i.e. can be with second secondary windings in series, it is also possible to and two or more second
Secondary windings in series.When not having power supply, the output voltage of transformator is the voltage of the second Secondary Winding.When there being power supply and second
During secondary windings in series, the output voltage of transformator is that supply voltage adds or deduct series transformer part and power sources in series
The voltage of the second Secondary Winding.When having the first reactor and the first switch, with the second winding strings during the first reactor
Joining or connect with tap-changing windings, the first switch is in parallel with the first reactor.When including the second reactor, the second reactor and master
The second windings in series or parallel connections of the first tap-changing windings of transformator or series transformer.
A kind of transformator that can improve impedance, including main transformer part, including the first windings and one or many
Individual first Secondary Winding；And series transformer part, including the second windings and one or more second Secondary Winding；With
And or include the one or both of the first switch and second switch；And or include the first reactor and the one of the second reactor
Or both.The second one times winding is coupled by electromagnetic induction with each winding in described second Secondary Winding, first once around
Group is coupled by electromagnetic induction with each winding in the first Secondary Winding.The wherein each winding in the first Secondary Winding and
Each winding in two Secondary Winding is connected respectively.Output voltage is that the voltage of the first Secondary Winding adds or deducts series-transformer
The voltage of second Secondary Winding with the first secondary windings in series of device part.When having the first reactor and switch, the first electricity
The second windings in series of anti-device and series transformer, the first switch is in parallel with the first reactor.When including the second reactor
Time, the second windings in series or in parallel of the second reactor and series transformer.The first windings of main transformer part
Can be with one or more winding self coupling in one or more first Secondary Winding, it is simply that the first windings i.e. can be with
One the first Secondary Winding self coupling, it is also possible to two or more first Secondary Winding self couplings；Use the one energy of self coupling structure
Improve the first winding voltages that the output voltage of transformator of impedance is main transformer part plus or deduct and the 1st
The voltage of the first Secondary Winding of secondary winding self coupling add or deduct series transformer part with the first windings or
The voltage of the second Secondary Winding of one secondary windings in series, does not the most use the portion voltage output principle of self coupling structure
Constant.
Multiple second Secondary Winding of a kind of transformator that can improve impedance can be with first secondary windings in series.
Generally, the first reactor is and the reactor of the first switch in parallel, and the second reactor is to be connected on transformation
In device, the first switch controls to use in the first reactor excision or input transformator, and second switch is excision or puts into series connection
Transformator.
When second switch uses electronic power switch device, a kind of transformator that can improve impedance becomes one can nothing
The transformator of level pressure regulation.
A kind of method changing transformer impedance that can improve impedance, including: with the first reactor and the one of the first switch
Planting the transformator that can improve impedance, wherein, when first closes, transformator excises the first reactor, and system impedance reduces.When
First cut-offs, and now the first reactor is connected in series in transformator, and impedance improves, wherein, when reactor is controlled reactor
Time, changing reactor reactance value, then the impedance of transformator is the most adjustable.This makes current limliting, current stabilization, filter in power system
Ripple, damping, reactive-load compensation etc. become a kind of controlled behavior, particularly high pressure or supertension or extra-high voltage system be one
New method.Originally the method for impedance is that to regulate transformator defeated by the AC voltage adjusting electrical switch increase and decrease tap-changing windings number of turn
The method going out voltage increases or reduces transformer impedance, and this method is the method increase by excision or putting into reactor or subtracts
Small transformers impedance, the advantage of its maximum is in the case of not changing transformer voltage, changes transformer impedance, this
There is in power system huge advantage.
A kind of method changing transformer impedance that can improve impedance specifically comprises the following steps that when a kind of change that can improve impedance
When the impedance of depressor is higher than regulation or desired value, step one can be carried out；When the impedance of a kind of transformator that can improve impedance is low
When regulation or desired value, step 2 can be carried out；In step 2, if requiring described a kind of transformator that can improve impedance
Impedance be adjustable and described first reactor be controlled reactor, then enter step 3, wherein, step one is opened for described first
Pass closes, and excises described first reactor, and the impedance of described a kind of transformator that can improve impedance reduces；Wherein, step 2 is
Described first switch OFF, described first reactor is connected in series into the of the main transformer of described a kind of transformator that can improve impedance
The second windings of one tap-changing windings or series transformer, the impedance of the most described a kind of transformator that can improve impedance improves,
If described first reactor is controllable type reactor, then carry out step 3；Wherein, step 3 is described first switch OFF, adjusts
Saving the reactance with the described a kind of transformator that can improve impedance of regulation of the described first reactor reactance value, the most described one can improve
The impedance of the transformator of impedance is the most adjustable.
As long as a kind of method main transformer improving transformer impedance of the present invention includes tap-changing windings or series-transformer
Device includes the second windings, and includes one or two reactor and switch.Wherein, reactor is connected on described tap-changing windings
Or on described the second windings, switch in parallel is on a reactor.Under normal condition, the switch being connected in parallel on reactor closes
Close, then short-circuit condition at reactor, then low impedance state at power system, when needs current limliting, current stabilization, filter, damp time, switch
Cut-offfing, now reactor seals in transformator, and system reactance increases.
A kind of method improving transformer impedance of the present invention or main transformer includes tap-changing windings or series transformer
Including the second windings, and include one or two reactor.Wherein, reactor is connected on described tap-changing windings or described
On two windings.Owing to inside transformer has sealed in reactor, its resistance value increases.
Beneficial effects of the present invention:
First, the first reactor and the switch of a kind of transformator that can improve impedance are equivalent to impedance regulator, when transformator needs
When wanting little impedance, switch closes, and reactor is ineffective, and when transformator needs big impedance, switch cut-offs, and reactor is connected in series into
Entering transformator, transformer impedance increases, if the first and second reactors are all controlled reactor, this indicates that one can carry
The impedance of the transformator of high impedance is the most adjustable, and this will be a kind of revolutionary variation at high pressure system for ultra-high voltage transmission,
Outside security of system increases, the current limliting of system, current stabilization, filter, damping etc. becomes a kind of controlled behavior.
Secondly, the second reactor of a kind of transformator that can improve impedance is equivalent to the built-in reactance of high-impedance transformer
Device, but which overcome that high-impedance transformer original built-in reactor voltage is high, capacity is big, cost is high, leakage field is difficult to overcome asks
Topic.
Again, the first reactor or second reactor of a kind of transformator that can improve impedance even can replace costliness
Air reactor.
Again, a kind of transformator that can improve impedance, when using self coupling design, need not split winding, high pressure, supertension,
Extra-high voltage, high-power transformer cost are greatly reduced, and loss significantly declines, and power system efficiency can be allowed to increase.System
System can use light-duty chopper, it might even be possible to cancels air reactor.
Again, a kind of transformator that can improve impedance can use low capacity, low-voltage, little switch at a low price the most small-sized
Electrical switch components and parts go to replace complete set electrical equipment to include various switch cubicle.Due to present invention low capacity, low-voltage
Switch goes to control high voltage, powerful power system, and the cost of switch is the lowest, can the most former technology switch used price
1/tens, even more than one percent.
Again, a kind of transformator that can improve impedance is to go to control high voltage, big merit with the reactor of low capacity, low-voltage
The power system of rate, the cost of reactor is the lowest, it might even be possible to used by the most former technology the 1/10 of reactor price.
Again, change the method that a kind of method of transformer impedance that can improve impedance instead of original transition impedance,
Its great advantage is: change transformer reactance value on the premise of not changing transformer output voltage.
Finally, for stray field produced by the low pressure used by a kind of transformator that can improve impedance, low capacity reactor
Shielding, reduce its stray loss produced in structural member, prevent the reliable clamping structure that hot-spot must be taked,
Reduce the mechanical vibration all these problem of reactor, implement for high voltage reactor and air reactor and want
Simply too much.
Accompanying drawing explanation
Fig. 1 is a kind of transformer principle figure that can improve impedance.
Fig. 2 is a kind of transformer principle figure that can improve impedance.
Fig. 3 is a kind of transformer principle figure that can improve impedance.
Fig. 4 is a kind of transformer principle figure that can improve impedance.
Fig. 5 is a kind of transformer principle figure that can improve impedance.
Fig. 6 is a kind of transformer principle figure that can improve impedance.
Fig. 7 is a kind of transformer principle figure that can improve impedance.
Fig. 8 is a kind of transformer principle figure that can improve impedance.
Fig. 9 is a kind of transformer principle figure that can improve impedance.
Figure 10 is a kind of transformer principle figure that can improve impedance.
Figure 11 is a kind of transformer principle figure that can improve impedance.
Figure 12 is a kind of transformer principle figure that can improve impedance.
Figure 13 is a kind of transformer principle figure that can improve impedance.
Figure 14 is a kind of transformer principle figure that can improve impedance.
Figure 15 is a kind of transformer principle figure that can improve impedance.
Figure 16 is a kind of transformer principle figure that can improve impedance.
Figure 17 is SSFZ 50000/121 transformer connection schematic diagram.
Figure 18 is a kind of transformer principle figure that can improve impedance.
Figure 19 is a kind of transformer principle figure that can improve impedance.
Figure 20 is a kind of transformer principle figure that can improve impedance.
Figure 21 is a kind of transformer principle figure that can improve impedance.
Figure 22 is a kind of transformer principle figure that can improve impedance.
Figure 23 is a kind of transformer principle figure that can improve impedance.
In figure: 1. the first windings；2. the first Secondary Winding；3. the first tap-changing windings or the second tap-changing windings；4.
Two windings；5. the second Secondary Winding；6. the first switch or second switch；7. the first reactor or the second reactor.
Principles above figure is substantially single-phase schematic diagram, and three-phase is in like manner.Wherein, the first tap-changing windings be to string become power supply around
Group, the second tap-changing windings is and the tap-changing windings of the first windings in series.Wherein, reactor and switch in parallel is the first electricity
Anti-device and the first switch, individually with the first tap-changing windings or the second windings in series be the second reactor and second switch.
Detailed description of the invention
Example: SSFZ 50000/121 power transformer, high pressure 121 ± 8 × 1.25%, middle pressure 36.75 ± 2 × 2.5%,
Low pressure 10.5KV, oil, other parameters are according to GB/T 6451.
Original design scheme as shown in figure 17, this scheme copper 14556KG, stalloy 24640KG, open circuit loss: 35KW,
Load loss: 228KW.And operationally need to connect an air reactor at medium voltage side, connect an anti-device unshakable in one's determination in low-pressure side.
A kind of principle of the transformator employing figure 18 that can improve impedance.This scheme copper 12145KG, stalloy
25468KG, open circuit loss: 34.4KW load loss: 217KW.Operationally connect in pressure regulation side an anti-device unshakable in one's determination.
When copper valency is 50 yuan/KG, during 24 yuan/KG of stalloy, new departure more cost-effective than original design scheme 7.7%, outer supernumerary segment
Save an expensive air reactor.Present stage, the profit margin of power transformer is only 8%.
Claims (12)
1. can improve a transformator for impedance, including:
Main transformer part, including the first windings, the first tap-changing windings and one or more first Secondary Winding；And
Series transformer part, including the second windings and one or more second Secondary Winding；And or include that first opens
Close and the first reactor,
Wherein, each winding in described the first windings or described first Secondary Winding with in described second Secondary Winding
Each winding is connected respectively,
Wherein, described first tap-changing windings to described the second winding power,
Wherein, output voltage is described main transformer part described the first of described a kind of transformator that can improve impedance is once
The voltage of winding or described first Secondary Winding plus or that deduct described series transformer part with described the first windings
Or the voltage of described second Secondary Winding of described first secondary windings in series,
Wherein, the second of the first tap-changing windings of described first reactor and described main transformer or described series transformer is once
Windings in series,
Wherein, described first switch is in parallel with described first reactor.
A kind of transformator that can improve impedance the most as claimed in claim 1, including two or more series transformer parts,
Wherein, the second Secondary Winding of said two or multiple series transformer part and the two or two of described main transformer part
Secondary winding is connected the most one by one,
Wherein, the output voltage of described a kind of transformator that can improve impedance is described the first two times of described main transformer part
The voltage of winding adds or deducts the institute with described first secondary windings in series of said two or multiple series transformer part
State the voltage of the second Secondary Winding.
A kind of transformator that can improve impedance the most as claimed in claim 1, described main transformer laminate section also include the second pressure regulation around
Group,
Wherein, the first windings in series of described second tap-changing windings and described main transformer part.
A kind of transformator that can improve impedance the most as claimed in claim 1, including described main transformer part first once
Winding and or multiple winding self coupling in the one or more first Secondary Winding,
Wherein, output voltage is described main transformer part described the first of described a kind of transformator that can improve impedance is once
Winding voltage plus or deduct the voltage with described first Secondary Winding of described the first winding self couplings and add or deduct
Described series transformer part with described the first windings or described first secondary windings in series described the second two times around
The voltage of group.
A kind of transformator that can improve impedance the most as claimed in claim 1,
Including the second reactor,
Wherein, the second of the first tap-changing windings of described second reactor and described main transformer or described series transformer is once
Windings in series or parallel connection.
A kind of transformator that can improve impedance the most as claimed in claim 1,
Including second switch,
Wherein, described second switch is connected on first tap-changing windings and the 2nd 1 of described series transformer the of described main transformer
Between secondary winding.
7. can improve a transformator for impedance, including:
Main transformer part, including the first windings and tap-changing windings；And
Series transformer part, including the second windings and one or more second Secondary Winding；And or include power supply；With
And
Or include the first switch and the first reactor,
Wherein, described the first windings are coupled by electromagnetic induction with described tap-changing windings, described the second windings and institutes
The each winding stated in the second Secondary Winding is coupled by electromagnetic induction,
Wherein, described tap-changing windings to described the second winding power,
Wherein, described power supply and the one or more second secondary windings in series one or more,
Wherein, the output voltage of described a kind of transformator that can improve impedance be the second two times of described series transformer part around
The voltage of group or described supply voltage plus or deduct described series transformer part the second two times with described power sources in series
The voltage of winding,
Wherein, described first reactor is connected with described the second windings or described tap-changing windings,
Wherein, described first switch is in parallel with described first reactor.
A kind of transformator that can improve impedance the most as claimed in claim 6,
Including the second reactor,
Wherein, the second of the first tap-changing windings of described second reactor and described main transformer or described series transformer is once
Windings in series or parallel connection.
9. can improve a transformator for impedance, including:
Main transformer part, including the first windings and one or more first Secondary Winding；And series transformer portion
Point, including the second windings and one or more second Secondary Winding；And or include the first switch and the first reactor,
Wherein, described the first windings are coupled by electromagnetic induction with each winding in described first Secondary Winding, described
The second one times winding is coupled by electromagnetic induction with each winding in described second Secondary Winding,
Wherein, each winding in described first Secondary Winding is connected respectively with each winding in described second Secondary Winding,
Wherein, the voltage that output voltage is described first Secondary Winding of described a kind of transformator that can improve impedance adds or subtracts
Remove the voltage of described second Secondary Winding with described first secondary windings in series of described series transformer part,
Wherein, the second windings in series of described first reactor and described series transformer,
Wherein, described first switch is in parallel with described first reactor.
A kind of transformator that can improve impedance the most as claimed in claim 9,
Including the second reactor,
Wherein, the second windings in series or in parallel of described second reactor and described series transformer.
11. a kind of transformators that can improve impedance as claimed in claim 9, including described main transformer part first once
Winding and or multiple winding self coupling in the one or more first Secondary Winding,
Wherein, output voltage is described main transformer part described the first of described a kind of transformator that can improve impedance is once
Winding voltage plus or deduct the voltage with described first Secondary Winding of described the first winding self couplings and add or deduct
Described series transformer part with described the first windings or described first secondary windings in series described the second two times around
The voltage of group.
The 12. a kind of methods changing transformer impedance that can improve impedance, it is characterised in that
If the impedance of described a kind of transformator that can improve impedance is higher than needing or setting, then carry out step one；
If the impedance of described a kind of transformator that can improve impedance is less than needing or setting, then carry out step 2；
In step 2, if requiring, the impedance of described a kind of transformator that can improve impedance is adjustable and described first reactor
It is controlled reactor, then carries out step 3,
Wherein, step one closes for described first, excises described first reactor, described a kind of transformation that can improve impedance
The impedance of device reduces；
Wherein, step 2 is described first switch OFF, described first reactor and described a kind of transformator that can improve impedance
The first tap-changing windings of main transformer or the second windings in series of series transformer, the most described a kind of can improve impedance
The impedance of transformator improves, if requiring, the impedance of described a kind of transformator that can improve impedance is adjustable and described first reactance
Device is controlled reactor, then carry out step 3；
Wherein, step 3 is described first switch OFF, regulates described first reactor reactance value and can carry to regulate described one
The reactance of the transformator of high impedance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2016105701191 | 2016-07-20 | ||
| CN2016207620283 | 2016-07-20 | ||
| CN201620762028 | 2016-07-20 | ||
| CN201610570119 | 2016-07-20 |
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| CN106057452A true CN106057452A (en) | 2016-10-26 |
| CN106057452B CN106057452B (en) | 2019-02-05 |
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| CN201620778449.5U Expired - Fee Related CN206497826U (en) | 2016-07-20 | 2016-07-24 | It is a kind of to improve the transformer of impedance |
| CN201610583165.5A Active CN106057452B (en) | 2016-07-20 | 2016-07-24 | A kind of transformer that can improve impedance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507700A (en) * | 2017-08-16 | 2017-12-22 | 孙崇山 | It is a kind of with the rectification of Novel reactor and furnace transformer built in transition impedance function |
| CN107507696A (en) * | 2017-08-16 | 2017-12-22 | 孙崇山 | A kind of novel high-power factor rectification and furnace transformer |
| CN117063383A (en) * | 2021-03-31 | 2023-11-14 | 日立能源瑞士股份公司 | Transformer device |
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| JPH01112715A (en) * | 1987-10-27 | 1989-05-01 | Toshiba Corp | Transformer for furnace |
| WO2001004720A1 (en) * | 1999-07-13 | 2001-01-18 | Abb Service S.R.L. | Transformer with secondary voltage electronic adjustment |
| JP2001189220A (en) * | 1999-12-27 | 2001-07-10 | Toshiba Corp | Transformer equipment |
| CN2602473Y (en) * | 2003-02-20 | 2004-02-04 | 朱跃钢 | Load-ratio voltage transformer |
| JP2008108920A (en) * | 2006-10-25 | 2008-05-08 | Toshiba Corp | Gas insulation stationary induction electric apparatus |
| CN101697312A (en) * | 2009-11-03 | 2010-04-21 | 保定天威集团有限公司 | Low-voltage dual-voltage on-load-tap-changing auto-transformer |
| CN203631289U (en) * | 2013-12-02 | 2014-06-04 | 中国西电电气股份有限公司 | Low-voltage on-load regulating transformer |
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2016
- 2016-07-24 CN CN201620778449.5U patent/CN206497826U/en not_active Expired - Fee Related
- 2016-07-24 CN CN201610583165.5A patent/CN106057452B/en active Active
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|---|---|---|---|---|
| JPH01112715A (en) * | 1987-10-27 | 1989-05-01 | Toshiba Corp | Transformer for furnace |
| WO2001004720A1 (en) * | 1999-07-13 | 2001-01-18 | Abb Service S.R.L. | Transformer with secondary voltage electronic adjustment |
| JP2001189220A (en) * | 1999-12-27 | 2001-07-10 | Toshiba Corp | Transformer equipment |
| CN2602473Y (en) * | 2003-02-20 | 2004-02-04 | 朱跃钢 | Load-ratio voltage transformer |
| JP2008108920A (en) * | 2006-10-25 | 2008-05-08 | Toshiba Corp | Gas insulation stationary induction electric apparatus |
| CN101697312A (en) * | 2009-11-03 | 2010-04-21 | 保定天威集团有限公司 | Low-voltage dual-voltage on-load-tap-changing auto-transformer |
| CN203631289U (en) * | 2013-12-02 | 2014-06-04 | 中国西电电气股份有限公司 | Low-voltage on-load regulating transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507700A (en) * | 2017-08-16 | 2017-12-22 | 孙崇山 | It is a kind of with the rectification of Novel reactor and furnace transformer built in transition impedance function |
| CN107507696A (en) * | 2017-08-16 | 2017-12-22 | 孙崇山 | A kind of novel high-power factor rectification and furnace transformer |
| CN117063383A (en) * | 2021-03-31 | 2023-11-14 | 日立能源瑞士股份公司 | Transformer device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN206497826U (en) | 2017-09-15 |
| CN106057452B (en) | 2019-02-05 |
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