CN108649597A - The analysis method that a kind of failure moving method and failure influence HVDC commutation failures - Google Patents
The analysis method that a kind of failure moving method and failure influence HVDC commutation failures Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
The invention discloses the analysis method that a kind of failure moving method and failure influence HVDC commutation failures, the failure moving method includes on the change of current busbar that the failure in AC network is moved to HVDC transmission system by way of the earthing reactance value of failure after determining migration.The analysis method includes that AC network progress Thevenin's equivalence is simplified rear HVDC transmission system；Electromagnetic transient simulation model is established according to HVDC transmission system after simplification；On the change of current busbar that failure in AC network is moved to the HVDC transmission system after simplifying using failure moving method；Apply migration failure on the change of current busbar of the electromagnetic transient simulation model of HVDC transmission system after simplification；Electromagnetic transient simulation, which is carried out, by electromagnetic transient simulation model obtains influence of the failure to Commutation Failures In Hvdc Transmission Systems.The present invention can improve the efficiency and precision that a large amount of different faults influence HVDC commutation failures in analysis AC network.
Description
Technical field
The present invention relates to electric power network technical fields, more particularly to a kind of failure moving method and failure to HVDC commutations
The analysis method that failure influences.
Background technology
In recent years, HVDC transmission system (high-voltage direct current, HVDC) is in the power system
Large-scale application is obtained.In a HVDC transmission system, electric energy from three-phase AC grid (sending end power grid) a bit
Export, is converted into direct current in current conversion station, receiving station is transmitted to by overhead line or cable；Direct current is converted in other side current conversion station
After exchange, the three-phase AC grid (receiving end power grid) of recipient is entered back into.Therefore current conversion station is the key equipment of HVDC, it is moved
State response speed is Microsecond grade, need electromagnetic transient simulation technology could accurate, detailed simulation its by the electricity after large disturbances
Magnetic transient process, to accurately influence of the analysis failure to HVDC commutation failures.However, electromagnetic transient simulation technology is by speed
With the limitation of scale, it is difficult to be emulated to total system.Even with parallel processing technique, when simulation scale becomes larger, by
The influence of the factors such as communication, data exchange and model algorithm during parallel processing carries out electromagnetic transient simulation appearance to total system
Easily there is the unstable phenomenon of numerical value.
Present analysis failure includes power system dynamic equivalence method on the method that HVDC commutation failures influence.With electromechanics-
Electromagnetism mixing transient emulation method.Power system dynamic equivalence method is the detailed electromagnetic transient simulation model for retaining HVDC, profit
Simplify AC system with dynamic equivalent technology, then establishes the electromagnetic transient simulation mould of the alternating current-direct current series-parallel connection electric system after simplifying
Type, the influence using electromagnetic transient simulation technology analysis failure to HVDC commutation failures.The power system dynamic equivalence method is only
It can consider influence of several specific position failures to HVDC commutation failures in AC network, processing capacity is limited, and exists and be difficult to
The error avoided.Electromechanics-electromagnetism mixing transient emulation method be to direct current and with the closely related part electro-magnetic transient side of direct current
Method is emulated, remaining extreme portions is emulated using electromechanical transient method, and two kinds of emulation modes pass through at the time of suitable
Interface exchanges result of calculation.When analyzing influence of the failure to commutation failure using electromechanics-electromagnetism mixing transient emulation method, need
Electromechanics-electromagnetic transient hybrid simulation model of extensive alternating current-direct current power grid is built, calculating is of high cost, computational efficiency is low；Electromechanical-electricity
There are the defects in terms of accuracy for magnetic mixing transient emulation method --- and fundametal compoment is only covered in the calculating of (i) electromechanics side, can not
Depict influence of the fast-changing aperiodic and harmonic component to electromagnetism side caused by disturbance.Although the machine that some scholars propose
Equivalent (frequency dependent network equivalent, the FDNE) method of electric side frequency dependence can improve emulation
Precision.But FDNE methods are in addition to the Fitting Calculation of parameter itself, it is also necessary to carry out passivity verification, therefore substantially increase
Workload reduces the efficiency of hybrid simulation.(ii) all filtered out at present using the non-fundametal compoment in electromagnetism side as unrelated amount, this into
One step reduces the precision of hybrid simulation.(iii) selection etc. of the position of electromechanical simulation and Electromagnetic Simulation interface, interaction sequential
The precision of hybrid simulation will all be influenced.
To sum up, failure on the analysis method that HVDC commutation failures influence all has that efficiency is low and low precision in the prior art
Problem, there is an urgent need for improve the analysis method that failure influences HVDC commutation failures to improve efficiency and precision by those skilled in the art.
Invention content
Failure pair is analyzed the object of the present invention is to provide a kind of failure moving method and using the failure moving method
The method that HVDC commutation failures influence analyzes the effect that a large amount of different faults influence HVDC commutation failures in AC network to improve
Rate and precision.
To achieve the above object, the present invention provides a kind of failure moving method, the failure moving method includes that will hand over
Failure in galvanic electricity net moves to changing for HVDC transmission system by way of the earthing reactance value of failure after determining migration
It flows on busbar.
Optionally, the failure by AC network is migrated by way of the earthing reactance value of failure after determining migration
Onto the change of current busbar of HVDC transmission system, specifically include：
Failure f in the exchange receiving end power grid of m times HVDC transmission line feed-ins is calculated using failure analysis methods to occur
The first voltage virtual value of each time direct current commutation voltage afterwards Wherein, hk
The node serial number of the change of current busbar of expression kth time HVDC transmission system, k=1,2 ..., m,After indicating that failure f occurs
Change of current busbar hkVoltage；
It is migration failure h to determine that the failure f moves to the failure on the change of current busbar of the HVDC transmission system；
The migration failure h is m weight failures, i.e. m betide the event on each time HVDC transmission system change of current busbar respectively simultaneously
Barrier；The change of current busbar that location determination is each time HVDC transmission system, the m failure occur for the failure of the m failure
Fault type be determined as the fault type of the failure f, the failure of the m failure occurs the moment and is determined as the failure f
Failure the moment occurs, the trouble duration of the m failure is determined as the trouble duration of failure f, passes through following step
Suddenly the earthing reactance value of the m failure is determined；
Determine the second voltage virtual value of each time direct current commutation voltage after the migration failure h occurs It indicates to migrate change of current busbar h after failure h occurskVoltage；And it is described
Second voltage virtual value is equal with the first voltage virtual value；
The relationship of the second voltage virtual value and the earthing reactance value of the migration failure h is determined using fault analytical method
FormulaWherein fk(Xh,f) indicate the second voltage virtual valueAbout earthing reactance value Xh,fLetter
Number；
According to the relational expression and the first voltage virtual value meter of the second voltage virtual value and equivalent earthing reactance value
Calculate the earthing reactance value X of the migration failure hh,f；
According to the earthing reactance value Xh,fThe failure f is moved on the change of current busbar of HVDC transmission system.
Optionally, the failure analysis methods include：
Determine positive and negative, the 03 sequence equivalent networks of the AC network；
By AC network equivalence before failure to the non-working port determined according to fault type；
The admittance matrix of the faulty circuit after failure in AC network is determined according to fault type；
The faulty circuit is connected with the circuit after the AC network equivalence at the non-working port, the event is asked
Hinder each order components of fault current at port；
It is equivalent using each order components and the positive and negative of the AC network, 03 sequences of fault current at the non-working port
Voltage effective value in network calculations HVDC transmission system after the failure of other nodes.
Optionally, described to specifically include AC network equivalence before failure to the non-working port determined according to fault type；
AC network before the failure is subjected to Thevenin's equivalence, obtains the circuit after the AC network equivalence.
Optionally, the AC network includes exchanging sending end power grid and exchanging receiving end power grid.
The present invention also provides the analysis method that a kind of failure influences Commutation Failures In Hvdc Transmission Systems, described point
Analysis method is analyzed using above-mentioned failure moving method, and the analysis method includes：
AC network progress Thevenin's equivalence is simplified rear HVDC transmission system；
Electromagnetic transient simulation model is established according to HVDC transmission system after the simplification；
The failure in the AC network is moved to the high pressure after the simplification using the failure moving method calculating
The earthing reactance value of failure after the change of current busbar of DC transmission system；
Apply on the change of current busbar of HVDC transmission system in the electromagnetic transient simulation model and is connect according to
The migration failure that ground reactance value determines；
Electromagnetic transient simulation, which is carried out, by the electromagnetic transient simulation model obtains the failure to the high-voltage dc transmission
The influence of electric system commutation failure.
Optionally, AC network is carried out after Thevenin's equivalence is simplified before HVDC transmission system described,
Further include：
Calculate the short-circuit ratio of receiving end power grid in the AC network；
Judge whether the short-circuit ratio is greater than or equal to 4；
When the short-circuit ratio is greater than or equal to 4, " HVDC transmission system progress Thevenin's equivalence is obtained described in execution
The step of HVDC transmission system after to simplification ".
According to specific embodiment provided by the invention, the invention discloses following technique effects：Failure provided by the invention
It is obtained in the analysis method influenced on Commutation Failures In Hvdc Transmission Systems by solving the Thevenin's equivalence circuit of AC network
The HVDC transmission system simplified has been arrived, and the failure in AC network has been moved on change of current busbar, thus can have been reduced
Cost is calculated, computational efficiency is improved, and then can efficiently analyze in AC network Arbitrary Fault to the shadow of HVDC commutation failures
It rings, is particularly suitable for analyzing influence of a large amount of fault samples to HVDC commutation failures.In addition, by with full electromagnetic transient simulation knot
Fruit compares, and can verify the method for the present invention has higher precision in terms of analyzing commutation failure.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the flow chart of failure moving method provided in an embodiment of the present invention；
Fig. 2 is the analysis method that failure provided in an embodiment of the present invention influences Commutation Failures In Hvdc Transmission Systems
Flow chart.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Failure pair is analyzed the object of the present invention is to provide a kind of failure moving method and using the failure moving method
The method that HVDC commutation failures influence analyzes the effect that a large amount of different faults influence HVDC commutation failures in AC network to improve
Rate and precision.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
The present invention provides a kind of failure moving method, the failure moving method includes leading to the failure in AC network
The mode for crossing the earthing reactance value of failure after determining migration moves on the change of current busbar of HVDC transmission system.
As shown in Figure 1, the failure in AC network is migrated by way of the earthing reactance value of failure after determining migration
Onto the change of current busbar of HVDC transmission system, specifically include：
Step 101：Event in the exchange receiving end power grid of m times HVDC transmission line feed-ins is calculated using failure analysis methods
Hinder the first voltage virtual value of each time direct current commutation voltage after f occurs
Wherein, the node serial number of the change of current busbar of expression kth time HVDC transmission system, k=1,2 ..., m,Table
Show change of current busbar h after failure f occurskVoltage, | * | indicate * virtual value；
Special, in single feedthrough system, m=1, the virtual value of direct current commutation voltage is after failure f occursh1For
The node serial number of DC converter busbar.
Step 102：Determine that failure f is moved on the change of current busbar of the HVDC transmission system in the AC network
Failure be migration failure h, failure h be that betide earthing reactance value on each time DC converter busbar simultaneously be Xh,fM weight therefore
Barrier, i.e. m betide the failure on each time HVDC transmission system change of current busbar respectively simultaneously；The failure of the m failure
The change of current busbar that location determination is each time HVDC transmission system occurs, described in the fault type of the m failure is determined as
The failure generation moment of the fault type of failure f, the m failure is determined as the failure generation moment of the failure f, the m
The trouble duration of a failure is determined as the trouble duration of failure f, and connecing for the m failure is determined by following steps
Ground reactance value.
Step 103：Determine the second voltage virtual value of each time direct current commutation voltage after the migration failure h occurs
Change of current busbar h after the migration failure h of expression failure f occurskVoltage；The commutation voltage of each time direct current is effective
ValueFormula (3) should be met, i.e., the described second voltage virtual value is equal with the first voltage virtual value.
Step 104：The earthing reactance of the second voltage virtual value and the migration failure h is determined using fault analytical method
The relational expression of value：
Wherein fk(Xh,f) indicate the second voltage virtual valueAbout earthing reactance value Xh,fFunction.
Special, in single feedthrough system, m=1, the equivalent fault of failure f is the ground connection electricity betided on change of current busbar
Anti- value is Xh,fSubstance failure.
Step 105：According to the relational expression and the first voltage of the second voltage virtual value and equivalent earthing reactance value
Virtual value calculates the earthing reactance value X of the migration failure hh,f。
After the migration failure h of failure f occurs, the virtual value of direct current commutation voltageFormula (5) should be met.
Formula (7) can be obtained by formula (3)-(6)
After system operation mode and failure f are determined,It is to determine.Formula (7) is the m equation about m variable, is led to
X can be obtained by crossing solution formula (7)h,fSolution.
Special, in single feedthrough system, m=1, simultaneous formula (5) and formula (6) can be in the hope of Xh,fSolution.
Step 106：According to the earthing reactance value Xh,fThe failure f is moved to the change of current of HVDC transmission system
On busbar.
The principle that failure moving method follows in the present embodiment is broken down (failure is not removed) in exchange receiving end power grid
The change of current busbar voltage virtual value of the new steady state equilibrium point reached afterwards, which is equal to, does AC network the simplification after Thevenin's equivalence
The change of current busbar voltage virtual value for the new steady state equilibrium point that migration failure (failure is not removed) reaches afterwards occurs in system.
In practical calculating process, the failure analysis methods described in above-mentioned steps 101 and step 104 include：
Determine positive and negative, the 03 sequence equivalent networks of the AC network；
By AC network equivalence before failure to the non-working port determined according to fault type；Specifically, can be first by institute
AC network carries out Thevenin's equivalence before stating failure, or carries out promise equivalence, obtains the circuit after the AC network equivalence；
The admittance matrix of the faulty circuit after failure in AC network is determined according to fault type；
The faulty circuit is connected with the circuit after the AC network equivalence at the non-working port, the event is asked
Hinder each order components of fault current at port；
It is equivalent using each order components and the positive and negative of the AC network, 03 sequences of fault current at the non-working port
Voltage effective value in network calculations HVDC transmission system after the failure of other nodes.
It should be noted that above-mentioned AC network includes exchanging sending end power grid and exchanging receiving end power grid, it is in the present embodiment
The failure for exchanging receiving end power grid is moved on the change of current busbar of HVDC transmission system.
The present invention also provides the analysis method that a kind of failure influences Commutation Failures In Hvdc Transmission Systems, described point
Analysis method is analyzed using above-mentioned failure moving method, and the analysis method includes：
Step 201：AC network progress Thevenin's equivalence is simplified rear HVDC transmission system.
Step 202：Electromagnetic transient simulation model is established according to HVDC transmission system after the simplification.
Step 203：It is calculated using the failure moving method and the failure in the AC network is moved into the letter
The earthing reactance value of failure after the change of current busbar of HVDC transmission system after change.
Step 204：Apply root on the change of current busbar of HVDC transmission system in the electromagnetic transient simulation model
The migration failure determined according to the earthing reactance value；Wherein, the generation position of failure is migrated, the moment occurs for fault type, failure
It is identical as migration prior fault with the parameters such as trouble duration.
Step 205：Electromagnetic transient simulation, which is carried out, by the electromagnetic transient simulation model obtains the failure to the height
Press the influence of DC transmission system commutation failure.
Due to influences of the failure h to commutation failure in HVDC transmission system after simplification and simplified preceding D.C. high voltage transmission
Influences of the failure f to commutation failure is similar in system, and exchange receiving end system can efficiently, be easily analyzed by migrating fault method
Influence of the Arbitrary Fault to HVDC in system.
In order to improve the precision that analysis failure influences Commutation Failures In Hvdc Transmission Systems, can will be exchanged described
Power grid carries out Thevenin's equivalence and is simplified before rear HVDC transmission system, further includes：
Calculate the short-circuit ratio of receiving end power grid in the AC network；
Judge whether the short-circuit ratio is greater than or equal to 4；
When the short-circuit ratio is greater than or equal to 4, " HVDC transmission system progress Thevenin's equivalence is obtained described in execution
The step of HVDC transmission system after to simplification ".
Due to will produce a large amount of harmonic wave in transient process, the harmonic wave distribution of system and harmonic wave decline before and after Thevenin's equivalence
Subtract situation difference.Therefore, although before and after Thevenin's equivalence after the failure of system steady state equilibrium point change of current busbar voltage virtual value
It is identical, but in transient process after a failure, the AC network impedance characteristic that system shows before and after Thevenin's equivalence is not
Together, this accuracy that will influence failure moving method.Especially when system short-circuit ratio (SCR) is smaller, corresponding AC system etc.
Value impedance value is larger, and influence of the variation of AC system equivalent impedance value to change of current busbar voltage is more apparent in transient process, wears
Dimension south is equivalent to be affected to accuracy.Therefore, when short-circuit ratio is more than or equal to 4, exchange system is analyzed with failure moving method
Influence of the failure of uniting to commutation failure has higher precision.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is said referring to method part
It is bright.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (7)
1. a kind of failure moving method, which is characterized in that the failure moving method includes passing through the failure in AC network
Determine that the mode of the earthing reactance value of failure after migrating moves on the change of current busbar of HVDC transmission system.
2. failure moving method according to claim 1, which is characterized in that the failure by AC network passes through true
The mode of the earthing reactance value of failure moves on the change of current busbar of HVDC transmission system after fixed migration, specifically includes：
It is each after occurring that failure f in the exchange receiving end power grid of m times HVDC transmission line feed-ins is calculated using failure analysis methods
Return the first voltage virtual value of direct current commutation voltage Wherein, hkIt indicates
The node serial number of the change of current busbar of kth time HVDC transmission system, k=1,2 ..., m,The change of current after expression failure f occurs
Busbar hkVoltage；
It is migration failure h to determine that the failure f moves to the failure on the change of current busbar of the HVDC transmission system；It is described
It is m weight failures to migrate failure h, i.e. m betide the failure on each time HVDC transmission system change of current busbar respectively simultaneously；Institute
The change of current busbar that location determination is each time HVDC transmission system, the failure of the m failure occur for the failure for stating m failure
Type is determined as the fault type of the failure f, and the failure generation moment of the m failure is determined as the failure of the failure f
The moment occurs, the trouble duration of the m failure is determined as the trouble duration of failure f, is determined by following steps
The earthing reactance value of the m failure；
Determine the second voltage virtual value of each time direct current commutation voltage after the migration failure h occurs It indicates to migrate change of current busbar h after failure h occurskVoltage；And it is described
Second voltage virtual value is equal with the first voltage virtual value；
The relational expression of the second voltage virtual value and the earthing reactance value of the migration failure h is determined using fault analytical methodWherein fk(Xh,f) indicate the second voltage virtual valueAbout earthing reactance value Xh,fLetter
Number；
Institute is calculated according to the relational expression and the first voltage virtual value of the second voltage virtual value and equivalent earthing reactance value
State the earthing reactance value X of migration failure hh,f；
According to the earthing reactance value Xh,fThe failure f is moved on the change of current busbar of HVDC transmission system.
3. failure moving method according to claim 2, which is characterized in that the failure analysis methods include：
Determine positive and negative, the 03 sequence equivalent networks of the AC network；
By AC network equivalence before failure to the non-working port determined according to fault type；
The admittance matrix of the faulty circuit after failure in AC network is determined according to fault type；
The faulty circuit is connected with the circuit after the AC network equivalence at the non-working port, the failure end is asked
Each order components of fault current at mouthful；
Utilize each order components of fault current at the non-working port and positive and negative, the 03 sequence equivalent networks of the AC network
Calculate the voltage effective value after the failure of other nodes in HVDC transmission system.
4. failure moving method according to claim 3, which is characterized in that described by AC network equivalence before failure to root
According to the non-working port that fault type determines, specifically include；
AC network before the failure is subjected to Thevenin's equivalence, obtains the circuit after the AC network equivalence.
5. according to claim 1 any one of them failure moving method, which is characterized in that the AC network includes that exchange is sent
It holds power grid and exchanges receiving end power grid.
6. the analysis method that a kind of failure influences Commutation Failures In Hvdc Transmission Systems, which is characterized in that the analysis side
Method is analyzed using claim 1-5 any one of them failure moving methods, and the analysis method includes：
AC network progress Thevenin's equivalence is simplified rear HVDC transmission system；
Electromagnetic transient simulation model is established according to HVDC transmission system after the simplification；
Calculated using claim 1-5 any one of them failure moving methods the failure in the AC network is moved to it is described
The earthing reactance value of failure after the change of current busbar of HVDC transmission system after simplification；
Apply on the change of current busbar of HVDC transmission system in the electromagnetic transient simulation model according to ground connection electricity
The determining migration failure of anti-value；
Electromagnetic transient simulation, which is carried out, by the electromagnetic transient simulation model obtains the failure to the D.C. high voltage transmission system
The influence of system commutation failure.
7. failure moving method according to claim 6, which is characterized in that AC network is carried out Dai Weinan etc. described
It is worth to after simplifying before HVDC transmission system, further includes：
Calculate the short-circuit ratio of receiving end power grid in the AC network；
Judge whether the short-circuit ratio is greater than or equal to 4；
When the short-circuit ratio is greater than or equal to 4, " HVDC transmission system progress Thevenin's equivalence letter is obtained into described in execution
The step of HVDC transmission system after change ".
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266032A (en) * | 2019-05-14 | 2019-09-20 | 天津大学 | A kind of feasible zone of HVDC system commutation process describes method |
| CN111983377A (en) * | 2020-07-14 | 2020-11-24 | 国网江苏省电力有限公司电力科学研究院 | Fault judgment method and device for high-voltage direct-current transmission line |
| CN113541189A (en) * | 2021-07-19 | 2021-10-22 | 国网上海市电力公司 | Interface positioning method suitable for large-scale alternating current-direct current power grid electromechanical-electromagnetic transient hybrid simulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110266032A (en) * | 2019-05-14 | 2019-09-20 | 天津大学 | A kind of feasible zone of HVDC system commutation process describes method |
| CN110266032B (en) * | 2019-05-14 | 2023-01-03 | 天津大学 | Feasible domain description method for HVDC system commutation process |
| CN111983377A (en) * | 2020-07-14 | 2020-11-24 | 国网江苏省电力有限公司电力科学研究院 | Fault judgment method and device for high-voltage direct-current transmission line |
| CN113541189A (en) * | 2021-07-19 | 2021-10-22 | 国网上海市电力公司 | Interface positioning method suitable for large-scale alternating current-direct current power grid electromechanical-electromagnetic transient hybrid simulation |
| CN113541189B (en) * | 2021-07-19 | 2024-02-02 | 国网上海市电力公司 | Interface positioning method for electromechanical-electromagnetic transient hybrid simulation |
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