CN205983473U - Alternating current -direct current simulation system is back -to -back pressed to dotted pair net height - Google Patents
Alternating current -direct current simulation system is back -to -back pressed to dotted pair net height Download PDFInfo
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- CN205983473U CN205983473U CN201620728916.3U CN201620728916U CN205983473U CN 205983473 U CN205983473 U CN 205983473U CN 201620728916 U CN201620728916 U CN 201620728916U CN 205983473 U CN205983473 U CN 205983473U
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- 238000004088 simulation Methods 0.000 title claims abstract description 78
- 230000005611 electricity Effects 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 230000008859 change Effects 0.000 claims abstract description 13
- 230000001052 transient effect Effects 0.000 claims description 96
- 238000000034 method Methods 0.000 claims description 30
- 238000004458 analytical method Methods 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 10
- 230000000052 comparative effect Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims 1
- 230000003993 interaction Effects 0.000 description 9
- 230000001186 cumulative effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008569 process Effects 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The utility model provides an alternating current -direct current simulation system is back -to -back pressed to dotted pair net height, simulation system contains: dotted pair wire mould piece, module and communication modules back -to -back, dotted pair wire mould piece contains a heavy -duty generator and a converter transformer, communication modules contains alternative electric generation transmission of electricity distribution unit and the 2nd converter transformer, the module contains back -to -back a converter transformer the 2nd converter transformer, first change of current unit and second change of current unit, the heavy -duty generator with converter transformer electricity is connected, converter transformer electricity connect with first change of current unit electricity is connected, first change of current unit with second change of current unit electricity is connected, second change of current unit with the 2nd converter transformer electricity is connected, the 2nd converter transformer with alternative electric generation transmission of electricity distribution unit electricity is connected.
Description
Technical field
This utility model is related to supply electrical domain, espespecially a kind of point back-to-back analogue system to net high voltage ac/dc.
Background technology
North China exist substantial amounts of large sized unit distance be directly accessed electrical network put to net power supply mode, pass
, in net power supply mode, simulation analysis set steady problem is all using the emulation mode of electromechanical transient for the point of system.With direct current skill
The development of art, many DC transmission engineerings and large-capacity power electronic installation put into operation in electrical network, and large sized unit point connects to net
Enter DC converter station power supply mode start occur, and then bring HVDC and point between net unit interactive one be
Row problem.Traditional DC transmission system operating analysis adopts electromagnetical transient emulation method, the machine using with set steady analysis
Electric transient emulation method difference larger it is impossible to make both emulation modes be combined with each other.
At present, had the cover type subnetting method of alternating current-direct current bulk power grid electromagnetism/electromechanical transient simulation, but the method pin
To general ac and dc systemses networking.The form that North China direct current transportation exists is more special, for back-to-back form, and tradition
Direct current transportation form also different, also there is the plant-grid connection form to net for the point, emulation mode is also required to consider back-to-back simultaneously
Both sides AC system impact.
Accordingly, it would be desirable to a kind of new emulation mode, can be in conjunction with dynamo-electric transient emulation method and electromagnetical transient emulation method
Advantage, carry out a little the mixing of net high voltage ac/dc being emulated back-to-back.
The cover type subnetting system of current alternating current-direct current bulk power grid electromagnetism/electromechanical transient simulation is illustrated in fig. 1 shown below, according to big
Electric pressure in electrical network, alternating current-direct current bulk power grid is divided into three subnets.First subnet is put into electro-magnetic transient side, and to it
Carry out electromagnetic transient simulation calculating, the second word net is put into electromechanical transient side, and electromechanical transient simulation calculating is carried out to it.First
The subnet part overlapping with the second subnet, is designated as the 3rd subnet, wherein comprises subnetting interface A and subnetting interface B, be each responsible for
First subnet and the second subnet enter line interface equivalent calculation.
In prior art, for putting to net high voltage ac/dc back-to-back simulation analysis, there are following two defects：
1st, in alternative electric generation transmission of electricity distribution system, do not comprise a little net is directly accessed with the pattern of direct current network.Great Rong
Amount electromotor point is directly accessed direct current network to net, and its simulation analysis system is with conventional alternative electric generation transmission of electricity distribution system not
With it is impossible to equivalent is voltage source, nor equivalent be power source.
2nd, in HVDC transmission system, do not comprise back-to-back alterating and direct current network operation pattern.High-voltage dc transmission
Electric system is two different systems with back-to-back alternating current-direct current network system, its operational mode and equivalent mode all different it is impossible to
Using HVDC transmission system, back-to-back alternating current-direct current network system is emulated.
Utility model content
This utility model purpose is to provide one kind to put to net high voltage ac/dc back-to-back analogue system, solves prior art
In cannot effectively simulate a little problem to the back-to-back emulation of net high voltage ac/dc.
For reaching above-mentioned purpose, point provided by the utility model back-to-back analogue system to net high voltage ac/dc, concrete bag
Contain：Point is to net module, back-to-back module and AC module；Described point comprises heavy-duty generator to net module and first change of current becomes
Depressor；Described AC module comprises alternative electric generation transmission of electricity power supply unit and the second converter power transformer；Described back-to-back module comprises
Described first converter power transformer, described second converter power transformer, the first convertor unit and the second convertor unit；Described Large Copacity is sent out
Motor is electrically connected with described first converter power transformer, and described first converter power transformer electrical connection is electrically connected with described first convertor unit
Connect, described first convertor unit is electrically connected with described second convertor unit, described second convertor unit is become with described second change of current
Depressor electrically connects, and described second converter power transformer is electrically connected with described alternative electric generation transmission of electricity power supply unit.
It is preferred that described first converter power transformer provides in above-mentioned point back-to-back analogue system to net high voltage ac/dc
Described point is to the first subnetting interface between net module and described back-to-back module；Described second converter power transformer provides described friendship
The second subnetting interface between flow module and described back-to-back module.
It is preferred that described first converter power transformer and institute in above-mentioned point back-to-back analogue system to net high voltage ac/dc
State the data-interface that the second converter power transformer is electromechanical transient simulation and/or electromagnetic transient simulation.
In above-mentioned point back-to-back analogue system to net high voltage ac/dc it is preferred that described point to net module in described in
Heavy-duty generator passes through the shafting model modeling of unit, and the method using electromechanical transient simulation carries out simulation analysis.
In above-mentioned point back-to-back analogue system to net high voltage ac/dc it is preferred that described in described back-to-back module
First convertor unit and described second convertor unit pass through valve group model modeling, and the method using electromagnetic transient simulation is emulated
Analysis.
Described friendship in above-mentioned point back-to-back analogue system to net high voltage ac/dc it is preferred that in described AC module
Stream generates electricity transmission of electricity power supply unit by equivalent Method Modeling, and the method using electromechanical transient simulation is analyzed.
It is preferred that described first converter power transformer and institute in above-mentioned point back-to-back analogue system to net high voltage ac/dc
State the second converter power transformer and also comprise comparing unit respectively, described comparing unit be used for respectively collection point to net module with exchange mould
The electromechanical transient step-length that block carries out electromechanical transient simulation analysis is temporary with the electromagnetism that back-to-back module carries out electromagnetic transient simulation analysis
State step-length, and relatively described electromechanical transient step-length and described electro-magnetic transient step-length generate comparative result.
It is preferred that described analogue system also comprises disturbance in above-mentioned point back-to-back analogue system to net high voltage ac/dc
Detector unit, described Disturbance Detection unit is used for detection disturbance before electromagnetic transient simulation step-length starts and position occurs.
This utility model also provides one kind to put to net high voltage ac/dc back-to-back emulation mode, and described emulation mode comprises：
Step one, respectively to point electromechanical transient simulation analysis is carried out to net module and AC module, electromagnetism is carried out to back-to-back module temporary
State simulation analysis；Step 2, by first converter power transformer provide heavy-duty generator voltage x current output data with lean against
The data interaction of back of the body module；The voltage x current output data of alternative electric generation transmission of electricity power supply unit is provided by the second converter power transformer
Data interaction with back-to-back module；Step 3, described back-to-back module is carried out by electromagnetic transient simulation and monitors electro-magnetic transient
The step-length cumulative length of emulation, when the step-length that described step-length cumulative length adds next electromagnetic transient simulation is more than electromechanical transient
During the step-length of emulation, the first converter power transformer and the first convertor unit carry out data interaction, and the second converter power transformer changes with second
Stream unit carries out data interaction.
It is preferred that described emulation mode also comprises in above-mentioned point back-to-back emulation mode to net high voltage ac/dc：Detection
Disturbance location；When disturbance will occur in the next electromagnetic transient simulation step-length of back-to-back module, then in described step 3
In carry out the electromagnetic transient simulation of disturbance after, electromechanical transient simulation in carrying out described step 2；When disturbance will occur in a little
Imitate to when in the next electromechanical transient simulation step-length of net module or AC module, then carrying out electro-magnetic transient in described step 3
Be engraved in step 2 and carry out electromechanical transient simulation very, and when disturbance.
Advantageous Effects of the present utility model are：Converter power transformer is used as machine-electricity transient model and electro-magnetic transient
The method of model subnetting interface from that ac bus are used is different as the method at data exchange interface, make by the both sides using transformator
For the subnetting interface of machine-electricity transient model and electrical-magnetic model, the characteristic can not being mutated using magnetic flux in transformator, reduce machine
Data difference between the big step-length emulation of electric transient state and the multiple little step-length emulation of electro-magnetic transient, is conducive to the data of subnetting seam
Exchange.
Brief description
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes the part of the application,
Do not constitute to restriction of the present utility model.In the accompanying drawings：
Fig. 1 is the cover type subnetting system schematic of existing direct current bulk power grid electromagnetism/electromechanical transient simulation；
Fig. 2 is point provided by the utility model to net high voltage ac/dc back-to-back analogue system schematic diagram；
Fig. 3 is point provided by the utility model to net high voltage ac/dc back-to-back emulation mode schematic flow sheet；
Fig. 4 is point provided by the utility model to net high voltage ac/dc back-to-back emulation mode process step schematic diagram.
Specific embodiment
Purpose, technical scheme and advantage for making this utility model embodiment become more apparent, with reference to embodiment
And accompanying drawing, this utility model is described in further details.Here, schematic description and description of the present utility model is used for
Explain this utility model, but be not intended as to restriction of the present utility model.
Refer to shown in Fig. 2, wherein converter power transformer A is the first converter power transformer, converter power transformer B is that second change of current becomes
Depressor, convertor unit A is the first convertor unit, and convertor unit B is the second convertor unit, and above-mentioned first or second only for ease of knowing
Not corresponding unit or module, do not limit its function and sequence.
Point provided by the utility model to net high voltage ac/dc back-to-back analogue system, specifically comprise：Point is to net mould
Block, back-to-back module and AC module；Described point comprises heavy-duty generator and the first converter power transformer to net module；Described friendship
Flow module comprises alternative electric generation transmission of electricity power supply unit and the second converter power transformer；Described back-to-back module comprises described first change of current
Transformator, described second converter power transformer, the first convertor unit and the second convertor unit；Described heavy-duty generator and described the
One converter power transformer electrical connection, described first converter power transformer electrical connection is electrically connected with described first convertor unit, and described first
Convertor unit is electrically connected with described second convertor unit, and described second convertor unit is electrically connected with described second converter power transformer,
Described second converter power transformer is electrically connected with described alternative electric generation transmission of electricity power supply unit.
In the above-described embodiments, described first converter power transformer provide described point to net module and described back-to-back module it
Between the first subnetting interface；Described second converter power transformer provides between described AC module and described back-to-back module second
Subnetting interface；That is, point between net module, back-to-back module and AC module three pass through the first converter power transformer and
Second converter power transformer carries out data interaction, and wherein said first converter power transformer and described second converter power transformer are electromechanics
Transient emulation and/or the data-interface of electromagnetic transient simulation.
In this utility model one preferred embodiment, described point passes through machine to the described heavy-duty generator in net module
The shafting model modeling of group, the method using electromechanical transient simulation carries out simulation analysis；In described back-to-back module described
One convertor unit and described second convertor unit pass through valve group model modeling, carry out emulation point using the method for electromagnetic transient simulation
Analysis；Described alternative electric generation in described AC module transmits electricity power supply unit by equivalent Method Modeling, is imitated using electromechanical transient
Genuine method is analyzed；Wherein shaft system of unit is equivalent to several matter being connected with coefficient of elasticity by shaft system of unit model modeling
Gauge block, and simulation analysis are carried out with this；And valve group is then equivalent to resistance switch model parallel connection damping circuit by valve group model modeling,
Equivalence method is modeled as alternative electric generation transmission of electricity power supply unit is equivalent to the model of ideal voltage source series impedance；In view of three can
It is achieved by the prior art, for this reason, this utility model here is not described in detail.
With this, it is decomposed into a little to net module, back-to-back module by point is mixed electrical network back-to-back to net high voltage ac/dc
With the subnetting method of AC module, and point to net module in using the shafting model of unit, heavy-duty generator is built
Mould, the method using electromechanical transient simulation is analyzed；Back-to-back module is built to commutation system using valve group model
Mould, the method using electromagnetic transient simulation is analyzed；Using equivalent method to exchange transmission ＆ distribution electric unit in AC module
It is modeled, be analyzed to effectively simulate real work midpoint to the net high voltage ac/dc back of the body using the method for electromechanical transient simulation
Backrest mixing electrical network simultaneously carries out accurate emulation testing.
In this utility model one preferred embodiment, described first converter power transformer and described second converter power transformer are also
Comprise comparing unit respectively, described comparing unit is used for collection point respectively and carries out electromechanical transient simulation to net module and AC module
The electromechanical transient step-length of analysis and back-to-back module carry out the electro-magnetic transient step-length of electromagnetic transient simulation analysis, and relatively described machine
Electric transient state step-length and described electro-magnetic transient step-length generate comparative result；With this, can be according to this comparative result during later stage emulation testing
Select suitable data exchange opportunity, effectively improve the emulation accuracy of data and the reliability of post analysis.
In this utility model one preferred embodiment, described analogue system also comprises Disturbance Detection unit, described disturbance
Detector unit is used for detection disturbance before electromagnetic transient simulation step-length starts and position occurs.Wherein, described perturbation process is concrete
Comprise：The model of disturbance is built on analogue system, then when Disturbance Detection unit detects Disturbance Model, in emulation first
The sequential of Disturbance Model is arranged on system, finally starts to emulate, detected by disturbance disturbed detector unit before emulation starts
There is position in it.
Refer to shown in Fig. 3 and Fig. 4, this utility model is directed to above-mentioned point to the back-to-back analogue system of net high voltage ac/dc also
One kind is provided to put to net high voltage ac/dc back-to-back emulation mode, described emulation mode comprises：Step one, respectively to point to net mould
Block and AC module carry out electromechanical transient simulation analysis, carry out electromagnetic transient simulation analysis to back-to-back module；Step 2, pass through
First converter power transformer provides the voltage x current output data of heavy-duty generator and the data interaction of back-to-back module；By
Two converter power transformers provide the voltage x current output data of alternative electric generation transmission of electricity power supply unit and the data interaction of back-to-back module；
Step 3, electromagnetic transient simulation is carried out to described back-to-back module and monitors the step-length cumulative length of electromagnetic transient simulation, work as institute
When stating step-length cumulative length and adding that the step-length of next electromagnetic transient simulation is more than the step-length of electromechanical transient simulation, first change of current becomes
Depressor and the first convertor unit carry out data interaction, and the second converter power transformer and the second convertor unit carry out data interaction.
In the above-described embodiments, described emulation also comprises：Detection disturbance location；When disturbance will occur in back-to-back module
When in next electromagnetic transient simulation step-length, then, after carrying out the electromagnetic transient simulation of disturbance in the described step 3, carrying out institute
State the electromechanical transient simulation in step 2；A little the next electromechanical transient of net module or AC module is imitated when disturbance will occur in
When in true step-length, then carry out electromagnetic transient simulation in described step 3, and be engraved in when disturbance in step 2 carry out dynamo-electric temporarily
State emulates.Specifically, then it is when disturbance will occur in the next electromagnetic transient simulation step-length of back-to-back module, then in institute
After carrying out disturbance simulation analysis in the described next one electromagnetic transient simulation step-length stating back-to-back module, then in described point to net mould
Carry out electromechanical transient simulation analysis in block and described AC module；When disturbance will occur in a little under net module or AC module
When in one electromechanical transient simulation step-length, then carry out electromagnetic transient simulation analysis in described back-to-back module, and in disturbance
It is engraved on described point and carry out electromechanical transient simulation analysis in net module and described AC module.
There is provided a little back-to-back emulation mode to net high voltage ac/dc by clearer explanation this utility model, below in conjunction with
Fig. 2 and Fig. 3, taking in real work as a example, does overall flow explanation to above-mentioned emulation mode：
In real work, carry out step one first, putting in net module, using shaft system of unit model, Large Copacity is generated electricity
Machine carries out electromechanical transient simulation；In point in net module, using valve group model to convertor unit A, that convertor unit B carries out electromagnetism is temporary
State emulates；Electromechanical transient simulation is carried out to AC module；
Then, step 2, the simulation step length to net module, back-to-back module and AC module three for the statistics point, tool are carried out
Body is in each the electromechanical transient simulation step-length putting to net module and AC module, and at subnetting interface A, Large Copacity generates electricity
The voltage x current output of machine carries out data exchange with converter power transformer A；At subnetting interface B, the voltage x current of AC system is defeated
Go out and carry out data exchange with converter power transformer B.
Then carry out step 3, carry out the electromagnetic transient simulation of little step-length in back-to-back module, and carry out step-length accumulation
The calculating of length, without the step-length reaching unit electromechanical transient simulation, then proceeds to emulate, if under on the horizon
One little step-length will exceed the step-length of electromechanical transient simulation with the cumulative length sum having counted, then this back-to-back module is being divided
Carry out data exchange with the voltage x current data of converter power transformer A and converter power transformer B at network interface A and subnetting interface B.
Finally before next simulation step length starts, detect disturbance.If disturbance will walk in next electromagnetic transient simulation
The long emulation occurring in back-to-back system (CCC-0), then carrying out disturbance in next simulation step length in step 3, then carry out in step 2
Emulation；If disturbance will occur in point in net system or AC system in next electromechanical transient simulation step-length, in step
Carry out normal state simulation in rapid three, and carry out the emulation in step 2 in the disturbance moment.
Advantageous Effects of the present utility model are：Converter power transformer is used as machine-electricity transient model and electro-magnetic transient
The method of model subnetting interface from that ac bus are used is different as the method at data exchange interface, make by the both sides using transformator
For the subnetting interface of machine-electricity transient model and electrical-magnetic model, the characteristic can not being mutated using magnetic flux in transformator, reduce machine
Data difference between the big step-length emulation of electric transient state and the multiple little step-length emulation of electro-magnetic transient, is conducive to the data of subnetting seam
Exchange.
Particular embodiments described above, has carried out entering one to the purpose of this utility model, technical scheme and beneficial effect
Step describes in detail, be should be understood that and the foregoing is only specific embodiment of the utility model, is not used to limit this
The protection domain of utility model, all within spirit of the present utility model and principle, any modification of being made, equivalent, change
Enter, should be included within protection domain of the present utility model.
Claims (8)
1. a kind of point to net high voltage ac/dc back-to-back analogue system it is characterised in that described analogue system comprises：Point is to net mould
Block, back-to-back module and AC module；
Described point comprises heavy-duty generator and the first converter power transformer to net module；
Described AC module comprises alternative electric generation transmission of electricity power supply unit and the second converter power transformer；
Described back-to-back module comprises described first converter power transformer, described second converter power transformer, the first convertor unit and
Two convertor units；
Described heavy-duty generator is electrically connected with described first converter power transformer, described first converter power transformer electrical connection with described
First convertor unit electrical connection, described first convertor unit is electrically connected with described second convertor unit, described second convertor unit
Electrically connect with described second converter power transformer, described second converter power transformer is electrically connected with described alternative electric generation transmission of electricity power supply unit
Connect.
2. point according to claim 1 to net high voltage ac/dc back-to-back analogue system it is characterised in that described first changes
Convertor transformer provides described point to the first subnetting interface between net module and described back-to-back module；Described second change of current transformation
Device provides the second subnetting interface between described AC module and described back-to-back module.
3. point according to claim 1 to net high voltage ac/dc back-to-back analogue system it is characterised in that described first changes
Convertor transformer and described second converter power transformer are the data-interface of electromechanical transient simulation and/or electromagnetic transient simulation.
4. point according to claim 1 to net high voltage ac/dc back-to-back analogue system it is characterised in that described point is to net
Described heavy-duty generator in module passes through the shafting model modeling of unit, and the method using electromechanical transient simulation is emulated
Analysis.
5. point according to claim 1 to net high voltage ac/dc back-to-back analogue system it is characterised in that described back-to-back
Described first convertor unit in module and described second convertor unit pass through valve group model modeling, using electromagnetic transient simulation
Method carries out simulation analysis.
6. point according to claim 1 to net high voltage ac/dc back-to-back analogue system it is characterised in that described exchange mould
Described alternative electric generation in block power supply unit of transmitting electricity passes through equivalent Method Modeling, is carried out point using the method for electromechanical transient simulation
Analysis.
7. point according to claim 1 to net high voltage ac/dc back-to-back analogue system it is characterised in that described first changes
Convertor transformer and described second converter power transformer also comprise comparing unit respectively, and described comparing unit is used for difference collection point to net
Module and AC module carries out the electromechanical transient step-length of electromechanical transient simulation analysis and back-to-back module carries out electromagnetic transient simulation
The electro-magnetic transient step-length of analysis, and relatively described electromechanical transient step-length and described electro-magnetic transient step-length generate comparative result.
8. point according to claim 1 to net high voltage ac/dc back-to-back analogue system it is characterised in that described emulation system
System also comprises Disturbance Detection unit, and described Disturbance Detection unit is used for detection disturbance before electromagnetic transient simulation step-length starts and sends out
Raw position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620728916.3U CN205983473U (en) | 2016-07-12 | 2016-07-12 | Alternating current -direct current simulation system is back -to -back pressed to dotted pair net height |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620728916.3U CN205983473U (en) | 2016-07-12 | 2016-07-12 | Alternating current -direct current simulation system is back -to -back pressed to dotted pair net height |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205983473U true CN205983473U (en) | 2017-02-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620728916.3U Active CN205983473U (en) | 2016-07-12 | 2016-07-12 | Alternating current -direct current simulation system is back -to -back pressed to dotted pair net height |
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| CN (1) | CN205983473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106202726A (en) * | 2016-07-12 | 2016-12-07 | 华北电力科学研究院有限责任公司 | A kind of some analogue system back-to-back to net high voltage ac/dc and method |
-
2016
- 2016-07-12 CN CN201620728916.3U patent/CN205983473U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106202726A (en) * | 2016-07-12 | 2016-12-07 | 华北电力科学研究院有限责任公司 | A kind of some analogue system back-to-back to net high voltage ac/dc and method |
| CN106202726B (en) * | 2016-07-12 | 2019-08-16 | 华北电力科学研究院有限责任公司 | A kind of point is to the back-to-back analogue system of net high voltage ac/dc and method |
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