CN207117130U - Based on the complementary intensive DC de-icing device of SVG and diode rectifier - Google Patents
Based on the complementary intensive DC de-icing device of SVG and diode rectifier Download PDFInfo
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- CN207117130U CN207117130U CN201721142712.2U CN201721142712U CN207117130U CN 207117130 U CN207117130 U CN 207117130U CN 201721142712 U CN201721142712 U CN 201721142712U CN 207117130 U CN207117130 U CN 207117130U
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- 230000000295 complement effect Effects 0.000 title claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 45
- 230000007935 neutral effect Effects 0.000 claims abstract description 24
- 230000005611 electricity Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 description 12
- 230000008018 melting Effects 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
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- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model discloses a kind of intensive DC de-icing device complementary based on SVG and diode rectifier, including ice-melt transformer, SVG and diode rectifier, SVG includes two SVG units, SVG units are composed in series by filter inductance and cascade converter, cascade converter is made up of the cascade of multiple current transformers, current transformer is made up of full-controlled switch device and drawn using three-phase star connection and neutral point, the cascade converter of two SVG units is connected to after respective filter inductance on the same vice-side winding of ice-melt transformer, the neutral point F of two SVG units is connected with diode rectifier DC side positive pole, output cathodes of the neutral point E as intensive DC de-icing device, output negative pole of the DC side negative pole of diode rectifier as intensive DC de-icing device.The utility model SVG capacity requirements are small, ice-melt characteristic is good, ice-melt reliability is high, grid-connected harmonic current is small, can be realized simultaneously with ice-melt, reactive-load compensation harmonic abatement functions and these functions.
Description
Technical field
It the utility model is related to the removing ice of power transmission line technology in electrical engineering, and in particular to one kind is based on SVG and two poles
The complementary intensive DC de-icing device of pipe rectifier.
Background technology
China's ice disaster is taken place frequently, and broken string bar, the safety fortune of serious threat to power network are easily caused after powerline ice-covering
Row and power supply reliability.Therefore, developing the DC de-icing device of Multiple Type both at home and abroad, combat a natural disaster to provide technology hand for power network
Section.According to structural principle, existing DC de-icing device can be divided mainly into three classes：
The first kind is that the uncontrollable rectifier type DC de-icing device of AC-to DC conversion (AC/DC) is realized using diode,
The Application No. CN200810031940.1 Chinese patent literature as disclosed in 20 days Mays in 2009 discloses one kind and is based on two poles
The rectifier that pipe is formed.Such device is simple in construction, cost is relatively low；But output voltage can not continuously adjust and controllability is poor,
To enable same deicing device to meet the ice-melt demand of a plurality of different length, line footpath transmission line of electricity, need to configure with gear number
Measure more and depth pressure regulating ice-melt transformer；And such deicing device only has ice-melt function and is difficult to extend, device profit
It is relatively low with rate.
Second class is that the phase control rectifier type DC de-icing device of AC-to DC conversion is realized using IGCT, such as 2008
Application No. CN200810047959.5 Chinese patent literature disclosed in December 3 disclose it is a kind of based on IGCT form
Rectifier.Such device exports ice-melt voltage continuously adjustabe, and with two kinds of functions of DC ice melting and reactive-load compensation, device profit
It is higher with rate；But Thyristor Controlled rectification inherent characteristic makes its grid-connected harmonic wave big, the filter capacitor electricity of supporting multigroup Large Copacity is needed
Anti- device group could meet grid-connected harmonic requirement, and overall floor space is big, cost is high.
The third is to realize that the full-controlled rectifier type DC ice melting of AC-to DC conversion fills using turn-off devices such as IGBT
Put, Application No. CN201210211925.1 Chinese patent literature discloses one kind and is based on as disclosed in 17 days October in 2012
Turn-off device forms rectifier.Such device typically can be with a variety of work(such as DC ice melting, reactive-load compensation, active power filtering
Can, grid-connected harmonic wave is small and ice-melt voltage continuously adjustabe, technical indicator are good；But its current transformer rated voltage electric current need to melt according to maximum
Ice electric current and maximum working voltage are chosen, and cause Converter Capacity big (at least not less than ice-melt capacity), because IGBT etc. is complete
The unit capacity cost of control type switching device is far above diode or IGCT so that and the overall cost of such deicing device is high,
It is difficult to popularization and application.
In addition,《Have the new deicing device of reactive-load compensation and active power filtering function concurrently》(High-Voltage Technology, 2016
7th phase) and Application No. CN201510138254.4 Chinese patent literature disclose it is a kind of by STATCOM and diode rectification
Device is parallel-connected to the structure of ice-melt transformer, and ice-melt is realized using diode rectifier+ice-melt transformer, and is multiplexed ice-melt change
Filter reactance of the depressor as STATCOM, so that device integrally has ice-melt, reactive-load compensation and active power filtering function, and
STATCOM capacity can independent optimization configuration with ice-melt capacity.But its STATCOM current transformer and diode rectifier independently of each other and
It can not work simultaneously, i.e., STATCOM parts can not participate in DC ice melting.This aspect causes the capacity of diode rectifier to press
Ice-melt is needed to become the multiple gears of setting to adapt to different circuits according to maximum ice-melt capacity configuration, and because ice-melt output voltage is discontinuous
Ice-melt demand；On the other hand, the device can not provide dynamic passive compensation and active power filtering function during ice-melt, i.e., it melts
Ice function and no-power compensation function can only timesharing input and can not get both simultaneously.
Utility model content
The technical problems to be solved in the utility model is：For the above mentioned problem of prior art, there is provided a kind of cheap
Diode rectifier and both good SVG of technical indicator complementary combinations, base vdiverse in function, technical indicator is good and cost is moderate
It is straight using diode rectifier and SVG in the complementary intensive DC de-icing device of SVG and diode rectifier, the utility model
The structure of stream side series connection makes both each only provide part ice-melt voltage, to reduce SVG capacity requirements and make ice-melt voltage x current
It is continuous controllable, using uncontrollable rectifier device and SVG ACs structure arranged side by side so that can also enter Mobile state while DC ice melting
Reactive-load compensation and improvement harmonic wave, SVG capacity requirements are small, ice-melt characteristic is good, ice-melt reliability is high, grid-connected harmonic current is small, have concurrently
There are ice-melt, reactive-load compensation harmonic abatement functions and these functions to realize simultaneously.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：
A kind of intensive DC de-icing device complementary based on SVG and diode rectifier, including ice-melt transformer, SVG
And diode rectifier, the AC of the SVG and diode rectifier are connected with ice-melt transformer respectively, the SVG and two
The DC side series connection output of pole pipe rectifier.
Preferably, the SVG includes two SVG units, and the SVG units are connected by filter inductance and cascade converter
Composition, the cascade converter are made up of the cascade of multiple current transformers, and the current transformer is formed and adopted by full-controlled switch device
Drawn with three-phase star connection and neutral point, the cascade converters of two SVG units is respectively after respective filter inductance
It is connected on the same vice-side winding of ice-melt transformer, the neutral point E of all current transformers extraction of two SVG units, neutrality
Point F draws the DC voltage output end as SVG respectively, and the neutral point F that draws of a SVG unit and diode rectifier
Output cathodes of the neutral point E that DC side positive pole is connected, another SVG unit is drawn as intensive DC de-icing device, institute
State output negative pole of the DC side negative pole of diode rectifier as intensive DC de-icing device.
Preferably, in the SVG control terminal of the cascade converter of two SVG units be connected with for regulate and control SVG it is defeated
Go out the neutral point excursion control device of voltage.
Preferably, the ice-melt transformer is the Multiple coil transformation with a primary side winding and at least two vice-side windings
Device, vice-side windings different from ice-melt transformer are connected the AC of the SVG and diode rectifier respectively.
Preferably, the diode rectifier is diode uncontrollable rectifier device, and the ice-melt transformer is with an original
The three-winding transformer of side winding and two vice-side windings.
Preferably, the diode rectifier is the pulse wave uncontrollable rectifier device of diode 6, and the ice-melt transformer is with one
The three-winding transformer of individual primary side winding and two vice-side windings.
Preferably, the diode rectifier is by two pulse wave uncontrollable rectifier devices of diode 6 diode in series
12 pulse wave uncontrollable rectifier devices, the ice-melt transformer are the four winding transformations with a primary side winding and three vice-side windings
Device, the AC for forming the pulse wave uncontrollable rectifier device of two diodes 6 of the pulse wave uncontrollable rectifier device of diode 12 become with ice-melt respectively
The different vice-side windings of depressor are connected.
The utility model is had the advantage that based on the SVG intensive DC de-icing device tools complementary with diode rectifier：
1st, SVG capacity requirements are small.The utility model SVG capacity can be much smaller than ice-melt capacity, between SVG capacity and ice-melt capacity
Difference can be provided by the relatively cheap diode rectifier of price.Realize that the direct current of ice-melt melts by SVG relative to simple
Ice mode, greatly reduce SVG capacity requirements and its cost.
2nd, ice-melt characteristic is good.The DC side ice-melt output voltage electric current of the device can be by SVG continuously adjustabes, so as to more hold
Easily match the ice-melt demand of different circuits；During its ice-melt simultaneously, SVG can still provide the compensation of dynamic passive compensation harmonic to power network
Function.
3rd, ice-melt reliability is high.When any one in SVG or diode rectifier breaks down, another current transformer is still
Part ice melting capability can be provided, ice-melt voltage range is simply exported and diminish, i.e., the device has certain fault-tolerance and melted
Ice is redundant, therefore its ice-melt reliability is high.
4th, grid-connected harmonic current is small, it is not necessary to which additional configurations low order filters as Thyristor Controlled rectification type deicing device
Device group, or even existing harmonic wave in power network can be also administered when needed.
5th, with ice-melt, reactive-load compensation harmonic abatement functions, and these functions can be realized simultaneously.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the structural representation of the utility model embodiment two.
Fig. 3 is the structural representation of the utility model embodiment three.
Embodiment
Embodiment one：
As shown in figure 1, the present embodiment includes melting based on SVG and the complementary intensive DC de-icing device of diode rectifier
The AC of ice transformer 1, SVG2 and diode rectifier 3, SVG2 and diode rectifier 3 respectively with the phase of ice-melt transformer 1
Even, the DC side of SVG2 and diode rectifier 3 series connection output.
As shown in figure 1, SVG2 includes two SVG units, SVG units are by filter inductance and cascade converter series connection group
Into cascade converter is made up of the cascade of multiple current transformers, and current transformer is by full-controlled switch device（Such as in the present embodiment
IGBT）Form and drawn using three-phase star connection and neutral point, the cascade converter of two SVG units is respectively by respective
Filter inductance after be connected on the same vice-side winding of ice-melt transformer 1, what all current transformers of two SVG units were drawn
Neutral point E, neutral point F draw the DC voltage output end as SVG2 respectively, and the neutral point F that draws of a SVG unit and
The neutral point E that the DC side positive pole of diode rectifier 3 is connected, another SVG unit is drawn fills as intensive DC ice melting
The output cathode put, the output negative pole of the DC side negative pole of diode rectifier 3 as intensive DC de-icing device.
In the present embodiment, the control terminal of the cascade converter of two SVG units is connected with for regulating and controlling SVG2 in SVG2
The neutral point excursion control device of output voltage.
In the present embodiment, ice-melt transformer 1 is to become with the Multiple coil of a primary side winding and at least two vice-side windings
Depressor, the primary side winding of ice-melt transformer 1 are connected to transformer station's 10kV or 35kV bus, the friendship of SVG2 and diode rectifier 3
Vice-side windings different from ice-melt transformer 1 are connected respectively for stream side.
In the present embodiment, diode rectifier 3 is diode uncontrollable rectifier device, and ice-melt transformer 1 is with a primary side
The three-winding transformer of winding and two vice-side windings.In addition diode rectifier 3 can also select other rectifications as needed
Device.
In terms of DC side, the output DC voltage of the intensive DC de-icing device of the present embodiment is whole by SVG2 and diode
Stream device 3 provide jointly, equal to it is rear both respectively export DC voltage linear superposition, i.e.,：
U dc =U 1_SVG +U 2_Idode （1）
Formula（1）In,U dc For the DC voltage of deicing device reality output,U 1_SVG Represent SVG2 VD (i.e.
The voltage difference of two central points), its size and polarity can be all controlled by SVG2,U 2_Idode Represent diode rectifier 3
Export DC voltage.To SVG2 VDU 1_SVG , the neutral point excursion for regulating and controlling SVG2 output voltages can be passed through
Control device is regulated and controled using neutral point excursion control method, its numerical value can continuously adjustabe within the specific limits, specific electricity
Current voltage adjusting method is referring to document《Have the mixed type DC ice melting power supply of STATCOM functions concurrently》(Automation of Electric Systems,
12 phases in 2013).Output DC voltage to diode rectifier 3U 2_Idode , its value depend primarily on melt become transformer pair
Side output voltage, can be regulated and controled by the multiple secondary gears of transformer configuration, also can single gear do not regulate and control.In said structure
In, the DC side series connection of SVG2 and diode rectifier 3, both output DC currents are equal to ice melting current, but export straight
Stream voltage is all only accounted in ice-melt output voltage must be a part of, therefore the capacity of SVG and diode rectifier can melt much smaller than circuit
Maximum ice-melt capacity needed for ice.
In terms of AC, the overall grid-connected current of the intensive DC de-icing device of the present embodiment is whole by SVG2 and diode
Stream device 3 together decides on, although diode rectifier 3 is uncontrollable, SVG2 ac-side current is controllable in interior freedom in a big way,
So that grid-connected current is freely controllable.Therefore its SVG accreditation while ice-melt carries out dynamic passive compensation and active power filtering.
For example the intensive DC de-icing device plan of the present embodiment is with the maximum ice melting current needed for icing circuit
2500A, maximum ice-melt voltage are 8000V, and it is 20MW thus to deduce ice-melt capacity requirement；In addition the reactive-load compensation that substation needs
There are 10kV busbar voltages in capacity 10Mvar, transformer station.According to above-mentioned condition parameter, tried one's best according to SVG capacity small overall to reduce
The principle of cost, the capacity that can choose SVG2 is 5Mvar × 2=10Mvar, rated current 1000A, rated voltage 2.9kV, per phase
Using 5 current transformers（Bridge-type power cell）Series connection.DC bus-bar voltage 900V, the output AC voltage of each current transformer
420V, part are from the IGBT that specification is 1700V/2400A.SVG neutral points output voltage can be continuous between -4.0kV~4.0kV
It is adjustable.Rated output DC voltage 4kV, the rated output DC current of diode rectifier 3 are 2.5kA, rated output capacity
For 10MW；The specified input current 3.2kV of AC, specified input current 1.8kA.Ice-melt transformer 1 is three-winding transformer, its
Rated voltage is 10kV/2.9kV/3.2kV, rated capacity 20MVA/10MVA/10MVA.
In summary, the AC of the SVG2 of the intensive DC de-icing device of the present embodiment and diode rectifier 3 point
The different vice-side windings of ice-melt transformer 1 are not connected to, and DC side series connection exports, diode rectifier 3 and SVG2 are only carried
For part ice-melt DC voltage, SVG2 capacity can be much smaller than ice-melt capacity, and difference is provided by diode rectifier 3, and is passed through
Regulation SVG2 neutral excursion voltage can make ice-melt voltage x current continuously controllable；Diode rectifier 3 and SVG2 ACs are simultaneously
Arrange and run simultaneously so that the intensive DC de-icing device of the present embodiment can also carry out dynamic reactive while DC ice melting
Compensation and harmonic wave is administered, the utility model is by the complementation of both cheap diode rectifier 3 and the good SVG2 of technical indicator
Combination so that DC de-icing device overall technology index is good, vdiverse in function, cost is moderate, synthesis is cost-effective.
Embodiment two：
As shown in Fig. 2 diode rectifier 3 is the pulse wave uncontrollable rectifier device of diode 6, ice-melt transformer 1 is with one
The three-winding transformer of primary side winding and two vice-side windings.
Embodiment three：
As shown in figure 3, diode rectifier 3 is by two pulse wave uncontrollable rectifier devices of diode 6 diode in series
12 pulse wave uncontrollable rectifier devices, ice-melt transformer 1 are four winding transformers with a primary side winding and three vice-side windings, structure
Into the pulse wave uncontrollable rectifier device of diode 12 the pulse wave uncontrollable rectifier device of two diodes 6 AC respectively with ice-melt transformer 1
Different vice-side windings be connected.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (7)
1. a kind of intensive DC de-icing device complementary based on SVG and diode rectifier, it is characterised in that become including ice-melt
Depressor（1）、SVG（2）And diode rectifier（3）, the SVG（2）And diode rectifier（3）AC respectively with ice-melt
Transformer（1）It is connected, the SVG（2）And diode rectifier（3）DC side series connection output.
2. the intensive DC de-icing device complementary based on SVG and diode rectifier according to claim 1, its feature
It is, the SVG（2）Comprising two SVG units, the SVG units are composed in series by filter inductance and cascade converter, institute
State cascade converter to be made up of the cascade of multiple current transformers, the current transformer is made up of full-controlled switch device and uses three-phase star
Shape connection and neutral point extraction, the cascade converter of two SVG units is connected to after respective filter inductance respectively to be melted
Ice transformer（1）Same vice-side winding on, F points of neutral point E, neutral point that all current transformers of two SVG units are drawn
SVG Yin Chu be used as（2）DC voltage output end, and the neutral point F and diode rectifier that SVG unit is drawn（3）
DC side positive pole be connected, output cathodes of the neutral point E as intensive DC de-icing device that another SVG unit is drawn,
The diode rectifier（3）Output negative pole of the DC side negative pole as intensive DC de-icing device.
3. the intensive DC de-icing device complementary based on SVG and diode rectifier according to claim 2, its feature
It is, the SVG（2）In two SVG units cascade converter control terminal be connected with for regulate and control SVG（2）Output electricity
The neutral point excursion control device of pressure.
4. the intensive DC de-icing device complementary based on SVG and diode rectifier according to claim 1 or 2 or 3,
Characterized in that, the ice-melt transformer（1）For the Multiple coil transformation with a primary side winding and at least two vice-side windings
Device, the SVG（2）And diode rectifier（3）AC respectively with ice-melt transformer（1）Different vice-side windings be connected.
5. the intensive DC de-icing device complementary based on SVG and diode rectifier according to claim 4, its feature
It is, the diode rectifier（3）For diode uncontrollable rectifier device, the ice-melt transformer（1）For with a primary side around
The three-winding transformer of group and two vice-side windings.
6. the intensive DC de-icing device complementary based on SVG and diode rectifier according to claim 4, its feature
It is, the diode rectifier（3）For the pulse wave uncontrollable rectifier device of diode 6, the ice-melt transformer（1）For with an original
The three-winding transformer of side winding and two vice-side windings.
7. the intensive DC de-icing device complementary based on SVG and diode rectifier according to claim 4, its feature
It is, the diode rectifier（3）For by two pulse wave uncontrollable rectifier devices of diode 6 pulse wave of diode 12 in series not
Control rectifier, the ice-melt transformer（1）For four winding transformers with a primary side winding and three vice-side windings, form
The AC of the pulse wave uncontrollable rectifier device of two diodes 6 of the pulse wave uncontrollable rectifier device of diode 12 respectively with ice-melt transformer（1）
Different vice-side windings be connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721142712.2U CN207117130U (en) | 2017-09-07 | 2017-09-07 | Based on the complementary intensive DC de-icing device of SVG and diode rectifier |
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| CN201721142712.2U CN207117130U (en) | 2017-09-07 | 2017-09-07 | Based on the complementary intensive DC de-icing device of SVG and diode rectifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359579A (en) * | 2017-09-07 | 2017-11-17 | 国网湖南省电力公司 | Based on the complementary intensive DC de-icing device of SVG and diode rectifier |
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2017
- 2017-09-07 CN CN201721142712.2U patent/CN207117130U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359579A (en) * | 2017-09-07 | 2017-11-17 | 国网湖南省电力公司 | Based on the complementary intensive DC de-icing device of SVG and diode rectifier |
| CN107359579B (en) * | 2017-09-07 | 2023-06-23 | 国网湖南省电力公司 | Intensive direct-current ice melting device based on SVG and diode rectifier complementation |
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