CN108565881A - Customary DC transmission system analogy method based on electromechanical transient simulation and system - Google Patents
Customary DC transmission system analogy method based on electromechanical transient simulation and system Download PDFInfo
- Publication number
- CN108565881A CN108565881A CN201810456292.8A CN201810456292A CN108565881A CN 108565881 A CN108565881 A CN 108565881A CN 201810456292 A CN201810456292 A CN 201810456292A CN 108565881 A CN108565881 A CN 108565881A
- Authority
- CN
- China
- Prior art keywords
- inverter
- state
- customary
- voltage
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 120
- 238000004088 simulation Methods 0.000 title claims abstract description 68
- 230000001052 transient effect Effects 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004364 calculation method Methods 0.000 claims abstract description 29
- 230000008859 change Effects 0.000 claims description 51
- 230000033228 biological regulation Effects 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 17
- 230000006872 improvement Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
Classifications
-
- 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
-
- 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]
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The customary DC transmission system analogy method based on electromechanical transient simulation that the invention discloses a kind of, including：Alternating voltage is obtained, and obtains the state that inverter exchanges step-length at upper one；When the state for exchanging step-length at upper one is commutation failure state, judge whether alternating voltage meets the first preset condition；If so, the state of judgement inverter is the non-status of fail of commutation, while obtaining Trigger Angle；If it is not, then judging the state of inverter for commutation failure state, while obtaining Trigger Angle；Blow-out angle is obtained according to Trigger Angle according to blow-out angle calculation formula；When blow-out angle is unsatisfactory for the second preset condition, the state of inverter is judged for commutation failure state, customary DC transmission system is solved according to the first quasi steady state model.The customary DC transmission system simulation system based on electromechanical transient simulation that the invention also discloses a kind of.Using the embodiment of the present invention, the simulation precision of customary DC transmission system during electromechanical transient calculates can be effectively improved.
Description
Technical field
The present invention relates to DC transmission system field more particularly to a kind of customary DC transmissions of electricity based on electromechanical transient simulation
System analogy method and system.
Background technology
Customary DC transmission system refers to the HVDC transmission system based on thyristor, generally by converter power transformer, change
It flows device, filter, smoothing reactor and DC power transmission line composition, power and flows to customary DC transmission system from AC system
Transverter be known as rectifier, the transverter that power flows to AC system from customary DC transmission system is known as inverter.It is handing over
It is general to replace using by AC system and customary DC transmission system during the electromechanical transient simulation of direct current hybrid power system calculates
The method of solution.When solving AC system, customary DC transmission system is equivalent to injecting power or electric current；It is conventional solving
When DC transmission system, AC system is equivalent to equivalent voltage source, quasi-steady state mould is generally used to customary DC transmission system
Type is simulated.
When AC system breaks down, customary DC transmission system inverter is likely to occur commutation failure.
Commutation failure is one of most common failure of customary DC transmission system inverter, when commutation failure occurs for inverter, direct current
The DC voltage of inverter reduces, and dc power also decreases.The quasi-steady state that existing electromechanical transient simulation uses in calculating
Modeling customary DC transmission system, the quasi steady state model cannot accurately reflect inverter in fault in ac transmission system
Commutation failure process, it is partially optimistic compared with actual conditions to the simulation of DC transmission system, to cause in electromechanical transient calculates
The problem of the simulation inaccuracy of customary DC transmission system.Therefore, it is necessary to using new emulation mode to electromechanical transient simulation
Mesohigh DC transmission system is simulated, to improve emulation and the calculating essence of customary DC transmission system in electromechanical transient simulation
Degree.
Invention content
The purpose of the embodiment of the present invention is to provide a kind of customary DC transmission system simulation side based on electromechanical transient simulation
Method and system can effectively improve the simulation precision of customary DC transmission system during electromechanical transient calculates.
To achieve the above object, an embodiment of the present invention provides a kind of, and the customary DC transmission of electricity based on electromechanical transient simulation is
System analogy method, including：
It obtains AC system and is supplied to the alternating voltage of customary DC transmission system, and obtain inverter and exchanged at upper one
The state of step-length；
When the state that the inverter exchanges at upper one step-length is the non-status of fail of commutation, the inverter is obtained
Trigger Angle；When the state that the inverter exchanges at upper one step-length is commutation failure state, judge that the alternating voltage is
The first preset condition of no satisfaction；
If so, judging the state of the inverter of current direct current step-length for the non-status of fail of commutation, while obtaining institute
State the Trigger Angle of inverter；If it is not, then judging the state of the inverter of current direct current step-length for commutation failure state, simultaneously
Obtain the Trigger Angle of the inverter；
Blow-out angle is obtained according to the Trigger Angle of the inverter according to blow-out angle calculation formula；
When the alternating voltage meets the first preset condition, judge whether the blow-out angle meets the second preset condition；
If so, judging the state of the inverter of current direct current step-length for commutation failure state；If it is not, then judging current direct current step
The state of the long inverter is the non-status of fail of commutation；
When judge the state of the inverter of current direct current step-length for commutation failure state when, according to the first quasi-steady state mould
Type solves customary DC transmission system.
Compared with prior art, a kind of customary DC transmission system simulation based on electromechanical transient simulation disclosed by the invention
Method obtains alternating voltage first, and obtains the state that inverter exchanges step-length at upper one；Then when the exchange step at upper one
When long state is commutation failure state, judge whether alternating voltage meets the first preset condition；If so, judgement inverter
State is the non-status of fail of commutation, while obtaining Trigger Angle；If it is not, then judging the state of inverter for commutation failure state, together
When obtain Trigger Angle；Blow-out angle is obtained according to Trigger Angle according to blow-out angle calculation formula；Finally when blow-out angle is unsatisfactory for second in advance
If when condition, judging the state of inverter for commutation failure state, customary DC transmission of electricity system being solved according to the first quasi steady state model
System.Solves the quasi steady state model simulation customary DC transmission of electricity system that existing electromechanical transient simulation uses in calculating in the prior art
System, the quasi steady state model cannot accurately reflect inverter in the case that fault in ac transmission system commutation failure process, to cause
The problem of the simulation inaccuracy of customary DC transmission system can effectively improve customary DC transmission system during electromechanical transient calculates
Simulation precision.
As the improvement of said program, first preset condition includes：
The alternating voltage is more than the first alternating voltage preset value or the alternating voltage in two neighboring exchange step-length
Whether increase, and increased voltage value is more than the second alternating voltage preset value.
Further include when the alternating voltage is unsatisfactory for the first preset condition as the improvement of said program：
Customary DC transmission system is solved according to the second quasi steady state model.
As the improvement of said program, if AC system three-phase voltage is symmetrical, AC system is supplied to customary DC defeated
The alternating voltage of electric system is the positive sequence voltage of change of current busbar；If AC system three-phase voltage asymmetry, AC system provides
Alternating voltage to customary DC transmission system is the minimum phase voltage of change of current busbar.
As the improvement of said program, when change of current busbar three-phase voltage asymmetry, blow-out angle calculation formula is：
When change of current busbar three-phase voltage is symmetrical, blow-out angle calculation formula is：
Wherein, γiFor the blow-out angle；XcFor transformer equivalent reactance；IdFor DC current, inversion is flowed to rectifier
Device is positive direction；kTFor transformer voltage ratio；VtiFor the ac line voltage virtual value of inverter change of current busbar；αiFor touching for inverter
Send out angle；Φ is due to natural commutation point Forward angle caused by change of current busbar three-phase voltage asymmetry；ΔUfFor minimum phase voltage
Voltage Drop value；η is regulation coefficient, generally takes 1.4, for the shadow from worry three-phase voltage asymmetry hour offset angle of resitting an exam
It rings.
As the improvement of said program, first quasi steady state model is：
Wherein, VdrFor the DC voltage of rectifier；ntFor the bridge number of transverter；kTFor transformer voltage ratio；VtrFor rectifier
The ac line voltage virtual value of change of current busbar；αrFor the Trigger Angle of rectifier；XcFor transformer equivalent reactance；IdFor DC current,
Inverter is flowed to as positive direction using rectifier；VdiFor inverter direct-current voltage；R is DC line resistance；L is DC line electricity
Sense；C is the half of the value of the equivalent capacity of DC line；IrThe electric current flowed through for the equivalent capacity of rectifier DC circuit.
To achieve the above object, the embodiment of the present invention additionally provides a kind of customary DC transmission of electricity based on electromechanical transient simulation
System simulation system, including：
Information acquisition unit is supplied to the alternating voltage of customary DC transmission system for obtaining AC system, and obtains
Inverter exchanges the state of step-length at upper one；
Trigger Angle acquiring unit, the Trigger Angle for obtaining the inverter；
First judging unit, when the state for being used to exchange step-length at upper one when the inverter is commutation failure state,
Judge whether the alternating voltage meets the first preset condition；If so, judging the shape of the inverter of current direct current step-length
State is the non-status of fail of commutation；If it is not, then judging the state of the inverter of current direct current step-length for commutation failure state；
Blow-out angle computing unit, for obtaining blow-out according to the Trigger Angle of the inverter according to blow-out angle calculation formula
Angle；
Second judgment unit judges whether the blow-out angle meets when the alternating voltage meets the first preset condition
Second preset condition；If so, judging the state of the inverter of current direct current step-length for commutation failure state；If it is not, then
Judge the state of the inverter of current direct current step-length for the non-status of fail of commutation；
Customary DC transmission system solves unit, for being to change when the state for the inverter for judging current direct current step-length
When phase status of fail, customary DC transmission system is solved according to the first quasi steady state model.
Compared with prior art, a kind of customary DC transmission system simulation based on electromechanical transient simulation disclosed by the invention
System obtains alternating voltage by information acquisition unit first, and obtains the state that inverter exchanges step-length at upper one；Then
When the state for exchanging step-length at upper one is commutation failure state, the first judging unit judges whether alternating voltage meets first
Preset condition if so, the state of judgement inverter is the non-status of fail of commutation, while obtaining Trigger Angle, if it is not, then judging inverse
Become the state of device as commutation failure state, while Trigger Angle acquiring unit obtains Trigger Angle；Blow-out angle computing unit is according to blow-out
Angle calculation formula obtains blow-out angle according to Trigger Angle；Finally when blow-out angle is unsatisfactory for the second preset condition, second judgment unit
The state of judgement inverter is commutation failure state, and customary DC transmission system solves unit and solved according to the first quasi steady state model
Customary DC transmission system.Solves the quasi steady state model simulation that existing electromechanical transient simulation uses in calculating in the prior art
Customary DC transmission system, the quasi steady state model cannot accurately reflect inverter in the case that fault in ac transmission system commutation failure
Process can effectively improve conventional during electromechanical transient calculates to the problem for causing the simulation of customary DC transmission system inaccurate
The simulation precision of DC transmission system.
As the improvement of said program, first preset condition includes：
The alternating voltage is more than the first alternating voltage preset value or the alternating voltage in two neighboring exchange step-length
Whether increase, and increased voltage value is more than the second alternating voltage preset value；
When the alternating voltage is unsatisfactory for the first preset condition, the customary DC transmission system solves unit and is additionally operable to
Customary DC transmission system is solved according to the second quasi steady state model.
As the improvement of said program, if AC system three-phase voltage is symmetrical, AC system is supplied to customary DC defeated
The alternating voltage of electric system is the positive sequence voltage of change of current busbar；If AC system three-phase voltage asymmetry, AC system provides
Alternating voltage to customary DC transmission system is the minimum phase voltage of change of current busbar；
When change of current busbar three-phase voltage asymmetry, blow-out angle calculation formula is：
When change of current busbar three-phase voltage is symmetrical, blow-out angle calculation formula is：
Wherein, γiFor the blow-out angle；XcFor transformer equivalent reactance；IdFor DC current, inversion is flowed to rectifier
Device is positive direction；kTFor transformer voltage ratio；VtiFor the ac line voltage virtual value of inverter change of current busbar；αiFor touching for inverter
Send out angle；Φ is due to natural commutation point Forward angle caused by change of current busbar three-phase voltage asymmetry；ΔUfFor minimum phase voltage
Voltage Drop value；η is regulation coefficient, generally takes 1.4, for the shadow from worry three-phase voltage asymmetry hour offset angle of resitting an exam
It rings.
As the improvement of said program, first quasi steady state model is：
Wherein, VdrFor the DC voltage of rectifier；ntFor the bridge number of transverter；kTFor transformer voltage ratio；VtrFor rectifier
The ac line voltage virtual value of change of current busbar；αrFor the Trigger Angle of rectifier；XcFor transformer equivalent reactance；IdFor DC current,
Inverter is flowed to as positive direction using rectifier；VdiFor inverter direct-current voltage；R is DC line resistance；L is DC line electricity
Sense；C is the half of the value of the equivalent capacity of DC line；IrThe electric current flowed through for the equivalent capacity of rectifier DC circuit.
Description of the drawings
Fig. 1 is a kind of customary DC transmission system analogy method based on electromechanical transient simulation provided in an embodiment of the present invention
Flow chart；
Fig. 2 is a kind of customary DC transmission system analogy method based on electromechanical transient simulation provided in an embodiment of the present invention
Another flow chart；
Fig. 3 is a kind of customary DC transmission system simulation system based on electromechanical transient simulation provided in an embodiment of the present invention
Structural schematic diagram.
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, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
It is a kind of customary DC transmission system based on electromechanical transient simulation provided in an embodiment of the present invention referring to Fig. 1, Fig. 1
The flow chart of analogy method；Including：
S1, acquisition AC system are supplied to the alternating voltage of customary DC transmission system, and obtain inverter at upper one
Exchange the state of step-length；
S2, when the state that the inverter exchanges at upper one step-length is the non-status of fail of commutation, obtain the inversion
The Trigger Angle of device；When the state that the inverter exchanges at upper one step-length is commutation failure state, the alternating current is judged
Whether pressure meets the first preset condition；
S3, if so, judging that the state of the inverter of current direct current step-length for the non-status of fail of commutation, obtains simultaneously
The Trigger Angle of the inverter；If it is not, then judging the state of the inverter of current direct current step-length for commutation failure state, together
When obtain the Trigger Angle of the inverter；
S4, blow-out angle is obtained according to the Trigger Angle of the inverter according to blow-out angle calculation formula；
S5, when the alternating voltage meet the first preset condition when, judge whether the blow-out angle meets the second default item
Part；If so, judging the state of the inverter of current direct current step-length for commutation failure state；If it is not, then judgement is current straight
The state for flowing the inverter of step-length is the non-status of fail of commutation；
S6, when judge the state of the inverter of current direct current step-length for commutation failure state when, it is accurate steady according to first
States model solves customary DC transmission system.
Specifically, the specific implementation process of the embodiment of the present invention can be found in Fig. 2, in step sl, in AC system and often
It advises in DC transmission system solution procedure, AC system and customary DC transmission system generally use different material calculations, hand over
The step-length (exchange step-length) of streaming system generally takes 0.01 second or 0.02 second, the step-length (direct current step-length) one of customary DC transmission system
As take 0.0005 second, therefore, exchanged in step-length at one, customary DC transmission system needs to calculate 20 to 40 steps.It is handed at one
It flows in step-length, if some direct current step-length judges that commutation failure occurs, commutation mistake is regarded as in subsequent direct current step-length
State is lost, is no longer judged, until next exchange step-length.Therefore, it is necessary first to obtain inverter and exchange step at upper one
Long state, while obtaining the alternating voltage that AC system is supplied to customary DC transmission system.
Specifically, being the non-status of fail of commutation when the inverter exchanges the state of step-length at upper one in step s 2
When, obtain the Trigger Angle of the inverter.When the state that the inverter exchanges at upper one step-length is commutation failure state,
Judge whether the alternating voltage meets the first preset condition.First preset condition includes：The alternating voltage is more than the
Whether one alternating voltage preset value or the alternating voltage increase in two neighboring exchange step-length, and increased voltage value is more than
Second alternating voltage preset value.
Specifically, in step s3, judging whether the alternating voltage is more than the first alternating voltage preset value；If so,
The state of the inverter of current direct current step-length is judged for the non-status of fail of commutation, while obtaining the triggering of the inverter
Angle；If it is not, then judging the state of the inverter of current direct current step-length for commutation failure state, while obtaining the inverter
Trigger Angle, i.e., no matter judge result for commutation failure or the non-status of fail of commutation, be required for obtain Trigger Angle, because of described first
All refer to Trigger Angle in quasi steady state model and second quasi steady state model, meanwhile, when by blow-out angle to determine whether changing
Mutually when failure, blow-out angle need to be acquired by Trigger Angle.
Specifically, when the state that the inverter exchanges at upper one step-length is commutation failure state, direct-flow inverter
DC voltage reduce, dc power also decreases, to influence alternating voltage, make alternating voltage be less than the first alternating voltage
Preset value.Preferably, judge whether the alternating voltage is recovered in current AC compensation, i.e., whether is the described alternating voltage
More than the first alternating voltage preset value, if so, judging that the state of the inverter of current direct current step-length does not fail for commutation
State.Preferably, the first alternating voltage preset value is 0.95p.u. (perunit value).
Further, judge whether the alternating voltage increases in two neighboring exchange step-length, and increased voltage value
More than the second alternating voltage preset value, while obtaining the Trigger Angle of the inverter；If so, judging the institute of current direct current step-length
The state for stating inverter is the non-status of fail of commutation；If it is not, then judging that the state of the inverter of current direct current step-length is to change
Phase status of fail, while obtaining the Trigger Angle of the inverter.Preferably, the second alternating voltage preset value is 0.05p.u.
(perunit value).
Specifically, in step s 4, blow-out angle is obtained according to the Trigger Angle of the inverter according to blow-out angle calculation formula；
Wherein, if AC system three-phase voltage is symmetrical, it is the change of current that AC system, which is supplied to the alternating voltage of customary DC transmission system,
The positive sequence voltage of busbar；If AC system three-phase voltage asymmetry, AC system is supplied to the friendship of customary DC transmission system
Galvanic electricity pressure is the minimum phase voltage of change of current busbar.
When change of current busbar three-phase voltage asymmetry, blow-out angle calculation formula is：
When change of current busbar three-phase voltage is symmetrical, blow-out angle calculation formula is：
Wherein, γiFor the blow-out angle；XcFor transformer equivalent reactance；IdFor DC current, inversion is flowed to rectifier
Device is positive direction；kTFor transformer voltage ratio；VtiFor the ac line voltage virtual value of inverter change of current busbar；αiFor touching for inverter
Send out angle；Φ is due to natural commutation point Forward angle caused by change of current busbar three-phase voltage asymmetry；ΔUfFor minimum phase voltage
Voltage Drop value；η is regulation coefficient, generally takes 1.4, for the shadow from worry three-phase voltage asymmetry hour offset angle of resitting an exam
It rings.
Specifically, in step s 5, the shape in addition to exchanging step-length in step S1 by judging the inverter at upper one
State (alternating voltage) judges the state of inverter described in current direct current step-length, when the alternating voltage meets the first default item
When part, i.e., the state of the inverter of current direct current step-length is judged by alternating voltage for the non-status of fail of commutation, it can be with
The state of inverter described in current direct current step-length is judged by the blow-out angle of inverter.
After acquiring the angle at the blow-out angle by formula (1) or formula (2), judge whether the blow-out angle meets
Two preset conditions, second preset condition are that the blow-out angle is less than or equal to 7.2 °.Then when the blow-out angle is less than or waits
When 7.2 °, judge the state of the inverter of current direct current step-length for commutation failure state；When the blow-out angle is more than
At 7.2 °, judge the state of the inverter of current direct current step-length for the non-status of fail of commutation.
Specifically, in step s 6, when the state of the inverter of the current direct current step-length of judgement is commutation failure state
When, customary DC transmission system is solved according to the first quasi steady state model.
First quasi steady state model is：
Wherein, VdrFor the DC voltage of rectifier；ntThe shape of step-length is exchanged at upper one for the inverter of transverter
State；kTFor transformer voltage ratio；VtrFor the ac line voltage virtual value of rectifier change of current busbar；αrFor the Trigger Angle of rectifier；XcFor
Transformer equivalent reactance；IdFor DC current, inverter is flowed to as positive direction using rectifier；VdiFor inverter direct-current voltage；R is
DC line resistance；L is DC line inductance；C is the half of the value of the equivalent capacity of DC line；IrFor rectifier DC line
The electric current that the equivalent capacity on road flows through.
Preferably, when the alternating voltage is unsatisfactory for the first preset condition, that is, judge the described inverse of current direct current step-length
When becoming non-into the commutation status of fail of state of device, according to the second quasi steady state model solution customary DC transmission system, at this point, even if
Meet the second preset condition at judgement blow-out angle, that is, judges the state of the inverter of current direct current step-length for commutation failure shape
When state, do not influence to solve straight-flow system by the second quasi steady state model at this time.When judgement blow-out angle is unsatisfactory for the second preset condition,
When judging non-for the commutation status of fail of the state of the inverter of current direct current step-length, then do not have to pass through the second quasi-steady state again
Model solution straight-flow system has solved customary DC because when judging that the alternating voltage is unsatisfactory for the first preset condition
Transmission system.
Second quasi steady state model is：
Wherein, VdrFor the DC voltage of rectifier；ntThe shape of step-length is exchanged at upper one for the inverter of transverter
State；kTFor transformer voltage ratio；VtrFor the ac line voltage virtual value of rectifier change of current busbar；αrFor the Trigger Angle of rectifier；XcFor
Transformer equivalent reactance；IdFor DC current, inverter is flowed to as positive direction using rectifier；VdiFor inverter direct-current voltage；αi
For the Trigger Angle of inverter；R is DC line resistance；L is DC line inductance；VtiFor the AC line electricity of inverter change of current busbar
It is pressed with valid value；C is the half of the value of the equivalent capacity of DC line；IrThe electricity flowed through for the equivalent capacity of rectifier DC circuit
Stream；IiThe electric current flowed through for the equivalent capacity of inverter circuit.
Further, the state for judging inverter described in current direct current step-length for commutation failure when, then it is subsequent straight
It is regarded as commutation failure state in stream step-length, is no longer judged, until reaching next exchange step-length.If it is determined that current straight
When the state for flowing inverter described in step-length is that commutation does not fail, then continue the shape for judging inverter described in next direct current step-length
State, at this point, blow-out angle is calculated by reacquiring Trigger Angle, to by judging whether blow-out angle meets the second preset condition
To continue to judge.
When it is implemented, obtaining alternating voltage first, and obtain the state that inverter exchanges step-length at upper one；Then when
When the state for exchanging step-length at upper one is commutation failure state, judge whether alternating voltage meets the first preset condition；If so,
The state of inverter is then judged for the non-status of fail of commutation, while obtaining Trigger Angle；If it is not, then judging that the state of inverter is to change
Phase status of fail, while obtaining Trigger Angle；Blow-out angle is obtained according to Trigger Angle according to blow-out angle calculation formula；Finally when blow-out angle
When being unsatisfactory for the second preset condition, the state of inverter is judged for commutation failure state, is solved according to the first quasi steady state model normal
Advise DC transmission system.
Compared with prior art, a kind of customary DC transmission system simulation based on electromechanical transient simulation disclosed by the invention
Method solves the quasi steady state model simulation customary DC transmission of electricity that existing electromechanical transient simulation uses in calculating in the prior art
System, the quasi steady state model cannot accurately reflect inverter in the case that fault in ac transmission system commutation failure process, to make
At the inaccurate problem of the simulation of customary DC transmission system, whether can be sent out with accurate judgement customary DC transmission system inverter
Raw commutation failure, and DC voltage and dc power response of the accurate simulation inverter after commutation failure occurs, can be effective
Improve the simulation calculation precision of customary DC transmission system in electromechanical transient simulation.
Embodiment two
It is a kind of customary DC transmission system based on electromechanical transient simulation provided in an embodiment of the present invention referring to Fig. 3, Fig. 3
The structural schematic diagram of simulation system；Including：
Information acquisition unit 1 is supplied to the alternating voltage of customary DC transmission system for obtaining AC system, and obtains
Inverter exchanges the state of step-length at upper one；
Trigger Angle acquiring unit 2, the Trigger Angle for obtaining the inverter；
First judging unit 3, when the state for being used to exchange step-length at upper one when the inverter is commutation failure state,
Judge whether the alternating voltage meets the first preset condition；If so, judging the shape of the inverter of current direct current step-length
State is the non-status of fail of commutation；If it is not, then judging the state of the inverter of current direct current step-length for commutation failure state；
Blow-out angle computing unit 4, for obtaining blow-out according to the Trigger Angle of the inverter according to blow-out angle calculation formula
Angle；
Second judgment unit 5 judges whether the blow-out angle meets when the alternating voltage meets the first preset condition
Second preset condition；If so, judging the state of the inverter of current direct current step-length for commutation failure state；If it is not, then
Judge the state of the inverter of current direct current step-length for the non-status of fail of commutation；
Customary DC transmission system solves unit 6, and the state for the inverter when the current direct current step-length of judgement is
When commutation failure state, customary DC transmission system is solved according to the first quasi steady state model.
Specifically, the specific implementation process of the embodiment of the present invention can be found in Fig. 2, in AC system and customary DC transmission of electricity system
In solution procedure of uniting, AC system and customary DC transmission system generally use different material calculations, the step-length of AC system
(exchange step-length) generally takes 0.01 second or 0.02 second, and the step-length (direct current step-length) of customary DC transmission system generally takes 0.0005
Second, it therefore, is exchanged in step-length at one, customary DC transmission system needs to calculate 20 to 40 steps.It is exchanged in step-length at one, such as
Some direct current step-length of fruit judges generation commutation failure, then is regarded as commutation failure state in subsequent direct current step-length, no longer
Judged, until next exchange step-length.Therefore, it is necessary first to which inverter is obtained upper by described information acquiring unit 1
The state of one exchange step-length, while obtaining the alternating voltage that AC system is supplied to customary DC transmission system.
Specifically, being to change when described information acquiring unit 1 gets the inverter to exchange the state of step-length at upper one
Mutually when non-status of fail, the Trigger Angle acquiring unit 2 obtains the Trigger Angle of the inverter.When described information acquiring unit 1
It gets the inverter and exchanges the state of step-length at upper one when being commutation failure state, first judging unit 3 judges
Whether the alternating voltage meets the first preset condition.First preset condition includes：The alternating voltage is more than first and hands over
Galvanic electricity presses whether preset value or the alternating voltage increase in two neighboring exchange step-length, and increased voltage value is more than second
Alternating voltage preset value.
Specifically, first judging unit 3 judges whether the alternating voltage is more than the first alternating voltage preset value；If
The state for the inverter for then judging current direct current step-length for the non-status of fail of commutation, at the same the Trigger Angle obtain it is single
Member 2 obtains the Trigger Angle of the inverter；If it is not, then judging that the state of the inverter of current direct current step-length is commutation failure
State, while the Trigger Angle acquiring unit 2 obtains the Trigger Angle of the inverter, i.e., no matter judge result for commutation failure or
The non-status of fail of commutation is required for obtaining Trigger Angle, because equal in first quasi steady state model and second quasi steady state model
It is related to Trigger Angle, meanwhile, when by blow-out angle, to determine whether when commutation failure, blow-out angle need to be acquired by Trigger Angle.
It is commutation failure shape when described information acquiring unit 1 gets the inverter to exchange the state of step-length at upper one
When state, the DC voltage of direct-flow inverter reduces, and dc power also decreases, and to influence alternating voltage, makes alternating voltage
Less than the first alternating voltage preset value.Preferably, judge whether the alternating voltage is recovered in current AC compensation, i.e.,
Whether the alternating voltage is more than the first alternating voltage preset value, if so, judge the inverter of current direct current step-length
State is the non-status of fail of commutation.Preferably, the first alternating voltage preset value is 0.95p.u. (perunit value).
Further, first judging unit 3 judges whether the alternating voltage increases in two neighboring exchange step-length
Add, and increased voltage value is more than the second alternating voltage preset value, while the Trigger Angle acquiring unit 2 obtains the inverter
Trigger Angle；If so, judging the state of the inverter of current direct current step-length for the non-status of fail of commutation；If it is not, then sentencing
The state of the inverter of settled preceding direct current step-length is commutation failure state, while the Trigger Angle acquiring unit 2 obtains institute
State the Trigger Angle of inverter.Preferably, the second alternating voltage preset value is 0.05p.u. (perunit value).
Specifically, blow-out angle computing unit 4 is obtained according to blow-out angle calculation formula according to the Trigger Angle of the inverter
To blow-out angle；Wherein, if AC system three-phase voltage is symmetrical, AC system is supplied to the alternating current of customary DC transmission system
Pressure is the positive sequence voltage of change of current busbar；If AC system three-phase voltage asymmetry, AC system are supplied to customary DC to transmit electricity
The alternating voltage of system is the minimum phase voltage of change of current busbar.
When change of current busbar three-phase voltage asymmetry, blow-out angle calculation formula is：
When change of current busbar three-phase voltage is symmetrical, blow-out angle calculation formula is：
Wherein, γiFor the blow-out angle；XcFor transformer equivalent reactance；IdFor DC current, inversion is flowed to rectifier
Device is positive direction；kTFor transformer voltage ratio；VtiFor the ac line voltage virtual value of inverter change of current busbar；αiFor touching for inverter
Send out angle；Φ is due to natural commutation point Forward angle caused by change of current busbar three-phase voltage asymmetry；ΔUfFor minimum phase voltage
Voltage Drop value；η is regulation coefficient, generally takes 1.4, for the shadow from worry three-phase voltage asymmetry hour offset angle of resitting an exam
It rings.
Specifically, judging that the inverter exchanges at upper one the state of step-length except through first judging unit 3
(alternating voltage) judges the state of inverter described in current direct current step-length, when the alternating voltage meets the first preset condition
When, i.e., judge that the state of the inverter of current direct current step-length for the non-status of fail of commutation, can also lead to by alternating voltage
It crosses the second judgment unit 5 and judges the blow-out angle of inverter to judge the state of inverter described in current direct current step-length.
After acquiring the angle at the blow-out angle by formula (1) or formula (2), the second judgment unit 5 judges institute
State whether blow-out angle meets the second preset condition, second preset condition is that the blow-out angle is less than or equal to 7.2 °.Then when
When the blow-out angle is less than or equal to 7.2 °, the second judgment unit 5 judges the shape of the inverter of current direct current step-length
State is commutation failure state；When the blow-out angle is more than 7.2 °, the second judgment unit 5 judges the institute of current direct current step-length
The state for stating inverter is the non-status of fail of commutation.
Specifically, when first judging unit 3 or the second judgment unit 5 judge the described inverse of current direct current step-length
When becoming the state of device as commutation failure state, the customary DC transmission system solves unit 6 and is asked according to the first quasi steady state model
Solve customary DC transmission system.
First quasi steady state model is：
Wherein, VdrFor the DC voltage of rectifier；ntThe shape of step-length is exchanged at upper one for the inverter of transverter
State；kTFor transformer voltage ratio；VtrFor the ac line voltage virtual value of rectifier change of current busbar；αrFor the Trigger Angle of rectifier；XCFor
Transformer equivalent reactance；IdFor DC current, inverter is flowed to as positive direction using rectifier；VdiFor inverter direct-current voltage；R is
DC line resistance；L is DC line inductance；C is the half of the value of the equivalent capacity of DC line；IrFor rectifier DC line
The electric current that the equivalent capacity on road flows through.
Preferably, when first judging unit 3 judges that the alternating voltage is unsatisfactory for the first preset condition, that is, judge
When the state of the inverter of current direct current step-length is commutation non-status of fail, the customary DC transmission system solves unit
6 solve customary DC transmission system according to the second quasi steady state model, at this point, even if the second judgment unit 5 is in judgement blow-out
Angle meets the second preset condition, that is, judge the state of the inverter of current direct current step-length for commutation failure state when, not shadow
It rings and straight-flow system is solved by the second quasi steady state model at this time.When the second judgment unit 5 is unsatisfactory for the at judgement blow-out angle
Two preset conditions when judging non-for the commutation status of fail of the state of the inverter of current direct current step-length, then do not have to lead to again
It crosses the second quasi steady state model and solves straight-flow system, because judging that the alternating voltage is unsatisfactory for the in first judging unit 3
When one preset condition, customary DC transmission system has been solved.
Second quasi steady state model is：
Wherein, VdrFor the DC voltage of rectifier；ntThe shape of step-length is exchanged at upper one for the inverter of transverter
State；kTFor transformer voltage ratio；VtrFor the ac line voltage virtual value of rectifier change of current busbar；αrFor the Trigger Angle of rectifier；XcFor
Transformer equivalent reactance；IdFor DC current, inverter is flowed to as positive direction using rectifier；VdiFor inverter direct-current voltage；αi
For the Trigger Angle of inverter；R is DC line resistance；L is DC line inductance；VtiFor the AC line electricity of inverter change of current busbar
It is pressed with valid value；C is the half of the value of the equivalent capacity of DC line；IrThe electricity flowed through for the equivalent capacity of rectifier DC circuit
Stream；IiThe electric current flowed through for the equivalent capacity of inverter circuit.
Further, the state for judging inverter described in current direct current step-length for commutation failure when, then it is subsequent straight
It is regarded as commutation failure state in stream step-length, is no longer judged, until reaching next exchange step-length.If it is determined that current straight
When the state for flowing inverter described in step-length is that commutation does not fail, then continue the shape for judging inverter described in next direct current step-length
State, at this point, blow-out angle is calculated by reacquiring Trigger Angle, to by judging whether blow-out angle meets the second preset condition
To continue to judge.
When it is implemented, obtaining alternating voltage by information acquisition unit 1 first, and obtains inverter and exchanged at upper one
The state of step-length；Then when the state for exchanging step-length at upper one is commutation failure state, the first judging unit 3 judges exchange
Whether voltage meets the first preset condition, if so, the state of judgement inverter is the non-status of fail of commutation, while obtaining triggering
Angle, if it is not, the state of inverter is then judged for commutation failure state, while Trigger Angle acquiring unit 2 obtains Trigger Angle；Blow-out angle
Computing unit 4 obtains blow-out angle according to blow-out angle calculation formula according to Trigger Angle；Finally when blow-out angle is unsatisfactory for the second default item
When part, second judgment unit 5 judges that the state of inverter is commutation failure state, and customary DC transmission system solves unit 6
Customary DC transmission system is solved according to the first quasi steady state model.
Compared with prior art, a kind of customary DC transmission system simulation based on electromechanical transient simulation disclosed by the invention
System solves the quasi steady state model simulation customary DC transmission of electricity that existing electromechanical transient simulation uses in calculating in the prior art
System, the quasi steady state model cannot accurately reflect inverter in the case that fault in ac transmission system commutation failure process, to make
At the inaccurate problem of the simulation of customary DC transmission system, whether can be sent out with accurate judgement customary DC transmission system inverter
Raw commutation failure, and DC voltage and dc power response of the accurate simulation inverter after commutation failure occurs, can be effective
Improve the simulation calculation precision of customary DC transmission system in electromechanical transient simulation.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of customary DC transmission system analogy method based on electromechanical transient simulation, which is characterized in that including：
It obtains AC system and is supplied to the alternating voltage of customary DC transmission system, and obtain inverter and exchange step-length at upper one
State；
When the state that the inverter exchanges at upper one step-length is the non-status of fail of commutation, the triggering of the inverter is obtained
Angle；When the state that the inverter exchanges at upper one step-length is commutation failure state, judge whether the alternating voltage is full
The first preset condition of foot；
If so, judging the state of the inverter of current direct current step-length for the non-status of fail of commutation, while obtaining described inverse
Become the Trigger Angle of device；If it is not, then judging that the state of the inverter of current direct current step-length for commutation failure state, obtains simultaneously
The Trigger Angle of the inverter；
Blow-out angle is obtained according to the Trigger Angle of the inverter according to blow-out angle calculation formula；
When the alternating voltage meets the first preset condition, judge whether the blow-out angle meets the second preset condition；If so,
Then judge the state of the inverter of current direct current step-length for commutation failure state；If it is not, then judging current direct current step-length
The state of the inverter is the non-status of fail of commutation；
When judge the state of the inverter of current direct current step-length for commutation failure state when, asked according to the first quasi steady state model
Solve customary DC transmission system.
2. the customary DC transmission system analogy method based on electromechanical transient simulation as described in claim 1, which is characterized in that
First preset condition includes：
The alternating voltage be more than the first alternating voltage preset value or the alternating voltage in two neighboring exchange step-length whether
Increase, and increased voltage value is more than the second alternating voltage preset value.
3. the customary DC transmission system analogy method based on electromechanical transient simulation as described in claim 1, which is characterized in that
When the alternating voltage is unsatisfactory for the first preset condition, further include：
Customary DC transmission system is solved according to the second quasi steady state model.
4. the customary DC transmission system analogy method based on electromechanical transient simulation as described in claim 1, which is characterized in that
If AC system three-phase voltage is symmetrical, it is change of current busbar that AC system, which is supplied to the alternating voltage of customary DC transmission system,
Positive sequence voltage；If AC system three-phase voltage asymmetry, AC system is supplied to the alternating voltage of customary DC transmission system
For the minimum phase voltage of change of current busbar.
5. the customary DC transmission system analogy method based on electromechanical transient simulation as claimed in claim 4, which is characterized in that
When change of current busbar three-phase voltage asymmetry, blow-out angle calculation formula is：
When change of current busbar three-phase voltage is symmetrical, blow-out angle calculation formula is：
Wherein, γiFor the blow-out angle；XcFor transformer equivalent reactance；IdFor DC current, flowing to inverter with rectifier is
Positive direction；kTFor transformer voltage ratio；VtiFor the ac line voltage virtual value of inverter change of current busbar；αiFor the triggering of inverter
Angle；Φ is due to natural commutation point Forward angle caused by change of current busbar three-phase voltage asymmetry；ΔUfFor minimum phase voltage
Voltage Drop value；η is regulation coefficient, generally takes 1.4, for the influence from worry three-phase voltage asymmetry hour offset angle of resitting an exam.
6. the customary DC transmission system analogy method based on electromechanical transient simulation as described in claim 1, which is characterized in that
First quasi steady state model is：
Wherein, VdrFor the DC voltage of rectifier；ntThe state of step-length is exchanged at upper one for the inverter of transverter；kT
For transformer voltage ratio；VtrFor the ac line voltage virtual value of rectifier change of current busbar；αrFor the Trigger Angle of rectifier；XcFor transformation
Device equivalent reactance；IdFor DC current, inverter is flowed to as positive direction using rectifier；VdiFor inverter direct-current voltage；R is direct current
Line resistance；L is DC line inductance；C is the half of the value of the equivalent capacity of DC line；IrFor rectifier DC circuit
The electric current that equivalent capacity flows through.
7. a kind of customary DC transmission system simulation system based on electromechanical transient simulation, which is characterized in that including：
Information acquisition unit is supplied to the alternating voltage of customary DC transmission system for obtaining AC system, and obtains inversion
Device exchanges the state of step-length at upper one；
Trigger Angle acquiring unit, the Trigger Angle for obtaining the inverter；
First judging unit judges when the state for being used to exchange step-length at upper one when the inverter is commutation failure state
Whether the alternating voltage meets the first preset condition；If so, judging that the state of the inverter of current direct current step-length is
The non-status of fail of commutation；If it is not, then judging the state of the inverter of current direct current step-length for commutation failure state；
Blow-out angle computing unit, for obtaining blow-out angle according to the Trigger Angle of the inverter according to blow-out angle calculation formula；
Second judgment unit judges whether the blow-out angle meets second when the alternating voltage meets the first preset condition
Preset condition；If so, judging the state of the inverter of current direct current step-length for commutation failure state；If it is not, then judging
The state of the inverter of current direct current step-length is the non-status of fail of commutation；
Customary DC transmission system solves unit, is lost for commutation for the state when the inverter for judging current direct current step-length
When losing state, customary DC transmission system is solved according to the first quasi steady state model.
8. the customary DC transmission system simulation system based on electromechanical transient simulation as described in claim 1, which is characterized in that
First preset condition includes：
The alternating voltage be more than the first alternating voltage preset value or the alternating voltage in two neighboring exchange step-length whether
Increase, and increased voltage value is more than the second alternating voltage preset value；
When the alternating voltage is unsatisfactory for the first preset condition, the customary DC transmission system solves unit and is additionally operable to basis
Second quasi steady state model solves customary DC transmission system.
9. the customary DC transmission system simulation system based on electromechanical transient simulation as described in claim 1, which is characterized in that
If AC system three-phase voltage is symmetrical, it is change of current busbar that AC system, which is supplied to the alternating voltage of customary DC transmission system,
Positive sequence voltage；If AC system three-phase voltage asymmetry, AC system is supplied to the alternating voltage of customary DC transmission system
For the minimum phase voltage of change of current busbar；
When change of current busbar three-phase voltage asymmetry, blow-out angle calculation formula is：
When change of current busbar three-phase voltage is symmetrical, blow-out angle calculation formula is：
Wherein, γiFor the blow-out angle；XcFor transformer equivalent reactance；IdFor DC current, flowing to inverter with rectifier is
Positive direction；kTFor transformer voltage ratio；VtiFor the ac line voltage virtual value of inverter change of current busbar；αiFor the triggering of inverter
Angle；Φ is due to natural commutation point Forward angle caused by change of current busbar three-phase voltage asymmetry；ΔUfFor minimum phase voltage
Voltage Drop value；η is regulation coefficient, generally takes 1.4, for the influence from worry three-phase voltage asymmetry hour offset angle of resitting an exam.
10. the customary DC transmission system simulation system based on electromechanical transient simulation, feature exist as described in claim 1
In first quasi steady state model is：
Wherein, VdrFor the DC voltage of rectifier；ntFor the bridge number of transverter；kTFor transformer voltage ratio；VtrFor the rectifier change of current
The ac line voltage virtual value of busbar；αrFor the Trigger Angle of rectifier；XcFor transformer equivalent reactance；IdFor DC current, with whole
It is positive direction that stream device, which flows to inverter,；VdiFor inverter direct-current voltage；R is DC line resistance；L is DC line inductance；C is
The half of the value of the equivalent capacity of DC line；IrThe electric current flowed through for the equivalent capacity of rectifier DC circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810456292.8A CN108565881B (en) | 2018-05-14 | 2018-05-14 | Method and system for simulating conventional direct-current power transmission system based on electromechanical transient simulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810456292.8A CN108565881B (en) | 2018-05-14 | 2018-05-14 | Method and system for simulating conventional direct-current power transmission system based on electromechanical transient simulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108565881A true CN108565881A (en) | 2018-09-21 |
| CN108565881B CN108565881B (en) | 2020-09-29 |
Family
ID=63538750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810456292.8A Active CN108565881B (en) | 2018-05-14 | 2018-05-14 | Method and system for simulating conventional direct-current power transmission system based on electromechanical transient simulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108565881B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113110099A (en) * | 2021-03-04 | 2021-07-13 | 清华大学 | Multi-mode integrated hybrid real-time simulation platform |
| CN113872229A (en) * | 2021-09-15 | 2021-12-31 | 华北电力科学研究院有限责任公司 | Flexible direct current transmission operation simulation method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104866689A (en) * | 2015-06-09 | 2015-08-26 | 西安交通大学 | Construction method of quasi-steady-state model of direct-current system under asymmetric fault |
| CN106208127A (en) * | 2016-08-19 | 2016-12-07 | 华北电力大学 | The HVDC transmission system emulation modelling method analyzed for sub-synchronous oscillation |
| CN107017653A (en) * | 2017-05-26 | 2017-08-04 | 河海大学 | Receiving end bulk power grid and extra-high voltage direct-current system interaction simulation model modeling method |
| CN107103147A (en) * | 2017-05-09 | 2017-08-29 | 河海大学 | A kind of UHVDC towards power characteristic simplifies simulation model |
| WO2017145461A1 (en) * | 2016-02-25 | 2017-08-31 | オムロン株式会社 | Power transmission route state detection device, power transmission route state detection system, power transmission route state detection method, power transmission route state detection program and power conversion device |
-
2018
- 2018-05-14 CN CN201810456292.8A patent/CN108565881B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104866689A (en) * | 2015-06-09 | 2015-08-26 | 西安交通大学 | Construction method of quasi-steady-state model of direct-current system under asymmetric fault |
| WO2017145461A1 (en) * | 2016-02-25 | 2017-08-31 | オムロン株式会社 | Power transmission route state detection device, power transmission route state detection system, power transmission route state detection method, power transmission route state detection program and power conversion device |
| CN106208127A (en) * | 2016-08-19 | 2016-12-07 | 华北电力大学 | The HVDC transmission system emulation modelling method analyzed for sub-synchronous oscillation |
| CN107103147A (en) * | 2017-05-09 | 2017-08-29 | 河海大学 | A kind of UHVDC towards power characteristic simplifies simulation model |
| CN107017653A (en) * | 2017-05-26 | 2017-08-04 | 河海大学 | Receiving end bulk power grid and extra-high voltage direct-current system interaction simulation model modeling method |
Non-Patent Citations (1)
| Title |
|---|
| 张松涛，等: ""应用机电暂态程序判断直流换相失败的分析"", 《电力技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113110099A (en) * | 2021-03-04 | 2021-07-13 | 清华大学 | Multi-mode integrated hybrid real-time simulation platform |
| CN113110099B (en) * | 2021-03-04 | 2023-03-14 | 清华大学 | Multi-mode integrated mixed real-time simulation platform |
| CN113872229A (en) * | 2021-09-15 | 2021-12-31 | 华北电力科学研究院有限责任公司 | Flexible direct current transmission operation simulation method and device |
| CN113872229B (en) * | 2021-09-15 | 2024-02-09 | 国网冀北电力有限公司电力科学研究院 | Flexible direct current transmission operation simulation method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108565881B (en) | 2020-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108808718B (en) | Method for determining direct current operation range of high-voltage direct current transmission system in alternating current fault | |
| CN103887810B (en) | Straight-flow system based on short-circuit ratio dynamic tracking continues phase conversion failure judgment method | |
| CN106803153A (en) | A kind of appraisal procedure and system of many feed-in ac and dc systemses commutation failure risks | |
| CN104166753B (en) | The method for weighing the interphase interaction relative strength index of multi-infeed HVDC system current conversion station | |
| CN106549377B (en) | A kind of handover method of alternating current-direct current combined hybrid system electromechanics-electromagnetic transient hybrid simulation | |
| CN108879664B (en) | AC/DC system online voltage stability evaluation method based on wide area measurement | |
| CN108565881A (en) | Customary DC transmission system analogy method based on electromechanical transient simulation and system | |
| CN104167726B (en) | Calculation method of single-phase multi-feed-in interaction effect factor based on impedance matrix | |
| CN104866689B (en) | A kind of unbalanced fault straight-flow system quasi steady state model construction method | |
| CN110441658B (en) | High-voltage direct current commutation failure judgment method considering direct current change | |
| CN110556853B (en) | Calculation method and system for providing initial value for electromagnetic transient simulation | |
| CN112016043B (en) | Method for calculating steady-state fault current of modularized multi-level converter | |
| CN110061500B (en) | Rapid assessment method and system for power supply capacity of power distribution network | |
| CN104993466B (en) | Cascading fault fast dynamic simulation method applicable to alternating current-direct current power grid | |
| CN106712030B (en) | Direct current receiving end AC system voltage stability distinguishing method based on WAMS dynamically track | |
| CN109633361A (en) | Middle straightening stream generator outlet short trouble steady-state current detection method | |
| CN109787266A (en) | Extra-high voltage direct-current complex fault on-line analysis decision-making technique and system | |
| CN112924784A (en) | Method, system and diagnosis device for judging commutation failure of direct-current power transmission system | |
| CN110460082B (en) | Commutation failure risk judgment method and system for multi-feed-in high-voltage direct-current system | |
| CN105406465B (en) | A kind of distribution net platform region state analysis method based on load moment nargin | |
| CN104734172A (en) | Self-adaption PI control method for improving HVDC system suppressing phase commutation failure capacity | |
| CN111769585A (en) | Commutation failure prediction method and device based on energy accumulation characteristics of inverter | |
| CN107069747A (en) | A kind of minimum start-up mode based on regional voltage stabilization determines method | |
| CN106780126B (en) | Simplified solving method for transient response of direct current system of direct current feed-in power grid | |
| CN106856334A (en) | A kind of power system state estimation method for considering flexible direct current control characteristic |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |