CN108365625A - The design method of power module in a kind of mixed type transverter - Google Patents
The design method of power module in a kind of mixed type transverter Download PDFInfo
- Publication number
- CN108365625A CN108365625A CN201810264010.4A CN201810264010A CN108365625A CN 108365625 A CN108365625 A CN 108365625A CN 201810264010 A CN201810264010 A CN 201810264010A CN 108365625 A CN108365625 A CN 108365625A
- Authority
- CN
- China
- Prior art keywords
- initial value
- mixed type
- type transverter
- transverter
- power module
- 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
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
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
-
- 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]
Abstract
The invention discloses a kind of design methods of power module in mixed type transverter, and the mixed type transverter includes NHA half-bridge power module and NFA full bridge power module, it is corresponding to obtain the first N when needing to meet output voltage constraintsHInitial value and the first NFInitial value；It is corresponding to obtain the 2nd N when needing to meet DC decompression operation constraintsHInitial value and the 2nd NFInitial value；It is corresponding to obtain the 3rd N when needing to meet DC line fault self-cleaning constraintsHInitial value and the 3rd NFInitial value；When need to meet valve group throw online move back constraints when, it is corresponding to obtain the 4th NHInitial value and the 4th NFInitial value；According to the N of acquisitionHAt least one of initial value obtain NHEnd value, and according to the N of acquisitionFAt least one of initial value obtain NFEnd value.The present invention can determine the quantity of half-bridge power module and full bridge power module in mixed type transverter according to different application demands.
Description
Technical field
The present invention relates to power modules in flexible DC transmission technology field more particularly to a kind of mixed type transverter to set
Meter method.
Background technology
Extra-high voltage, remote, large capacity transmission are the important development directions of flexible DC power transmission, can meet large-scale energy base
Extra-high voltage, remote, large capacity flexible DC power transmission are applied to Inverter Station, can be promoted more by the demand that ground electric power is sent outside
The safe and stable level of direct current feed-in receiving end power grid.
Under extra-high voltage, remote, large capacity transmission scene, flexible DC power transmission is needed using direct current overhead line as defeated
Electric medium, although the cost of direct current overhead line is low, high failure rate, in order to improve the reliability of flexible direct current power transmission system,
Flexible direct current power transmission system when DC line fault is avoided to stop transport, the transverter of flexible direct current power transmission system has to have direct current
Failure self-cleaning ability and quickly restart kinetic force.
A kind of topology for mixed type transverter that the prior art provides uses each of cascaded multilevel structure, transverter
Power module in bridge arm is composed in series by half-bridge power module and the mixing of full bridge power module, is meeting DC Line Fault self-cleaning
While with quickly restarting, cost and the loss of transverter can be effectively controlled, there is larger application potential, and according to not
With application demand, the quantity of half-bridge power module and full bridge power module is different in mixed type transverter, therefore, according to
Different application demands determines that the quantity of half-bridge power module and full bridge power module has particularly significant in mixed type transverter
Meaning.
Invention content
Technical problem to be solved of the embodiment of the present invention is, provides a kind of setting for power module in mixed type transverter
Meter method can determine the number of half-bridge power module and full bridge power module in mixed type transverter according to different application demands
Amount.
In order to solve the above-mentioned technical problem, an embodiment of the present invention provides power modules in a kind of mixed type transverter to set
Meter method, the mixed type transverter includes NHA half-bridge power module and NFA full bridge power module, including：
When the mixed type transverter needs to meet output voltage constraints, according to the mixed type under rated power
Amplitude, the rated direct voltage of the mixed type transverter and the specified fortune of power module of the ac phase voltage of transverter output
Row voltage obtains the first NHInitial value and the first NFInitial value；
When the mixed type transverter needs to meet DC decompression operation constraints, according to the width of DC decompression operation
The amplitude for the ac phase voltage that the mixed type transverter exports when degree, DC decompression operation, the volume of the mixed type transverter
The rating operating voltage for determining DC voltage and power module obtains the 2nd NHInitial value and the 2nd NFInitial value；
When the mixed type transverter needs to meet DC line fault self-cleaning constraints, according to DC line event
Hinder the amplitude of the ac phase voltage of mixed type transverter output described in reset procedure, the nominal DC of the mixed type transverter
The rating operating voltage of voltage and power module obtains the 3rd NHInitial value and the 3rd NFInitial value；
When the mixed type transverter need to meet valve group throw online move back constraints when, institute during being moved back according to valve group throwing
State the power-factor angle of mixed type transverter, valve group throws the width for moving back the ac phase voltage of the mixed type transverter output in the process
The rating operating voltage of value, the rated direct voltage of the mixed type transverter and power module obtains the 4th NHInitial value and
Four NFInitial value；
According to the first NHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NHAt least one of initial value obtains
Obtain NHEnd value, and according to the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFIn initial value at least
One acquisition NFEnd value.
Further, described when the mixed type transverter needs to meet output voltage constraints, according to specified work(
The amplitude for the ac phase voltage that the mixed type transverter exports under rate, the rated direct voltage and work(of the mixed type transverter
The rating operating voltage of rate module obtains the first NHInitial value and the first NFInitial value, specially：
When the mixed type transverter needs to meet preset active power and reactive power output area, according to following
Formula, which calculates, obtains the first NHInitial value and the first NFInitial value：
Or
Wherein, UACFor the amplitude of the ac phase voltage of the mixed type transverter output under rated power, UDCIt is described mixed
The rated direct voltage of mould assembly transverter, USMFor the rating operating voltage of power module.
Further, the amplitude U for the ac phase voltage that the mixed type transverter exports under rated powerACAccording to following public affairs
Formula, which calculates, to be obtained：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, and P, Q are respectively flexible under rated power
DC converter station injects the active power and reactive power of AC system, R0For the total of transformer, bridge arm reactor and converter valve
Equivalent loss resistance, ω0For power frequency angular frequency, LTFor the short-circuit impedance value of transformer conversion to converter valve side, L is bridge arm reactance
The inductance value of device.
Further, described when the mixed type transverter needs to meet DC decompression operation constraints, according to straight
It is the amplitude of the ac phase voltage of mixed type transverter output when flowing amplitude, the DC decompression operation of brownout operation, described mixed
The rated direct voltage of mould assembly transverter and the rating operating voltage of power module obtain the 2nd NHInitial value and the 2nd NFInitially
Value, specially：
When the mixed type transverter needs to meet DC decompression operation constraints, is calculated and obtained according to following formula
2nd NHInitial value and the 2nd NFInitial value：
Or
Wherein, α is the amplitude of DC decompression operation, generally 70%~80%, UACIt is described mixed when being run for DC decompression
The amplitude of the ac phase voltage of mould assembly transverter output, UDCFor the rated direct voltage of the mixed type transverter, USMFor power
The rating operating voltage of module.
Further, the amplitude U of the ac phase voltage of mixed type transverter output when DC decompression is runACAccording to
Lower formula, which calculates, to be obtained：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, when P, Q are respectively DC decompression operation
Flexible direct current converter station injects the active power and reactive power of AC system, R0For transformer, bridge arm reactor and converter valve
Total equivalent loss resistance, ω0For power frequency angular frequency, LTBe transformer conversion to converter valve side short-circuit impedance value, L is bridge arm
The inductance value of reactor.
It is further, described when the mixed type transverter needs to meet DC line fault self-cleaning constraints,
It is changed according to amplitude, the mixed type of the ac phase voltage of the output of mixed type transverter described in DC line fault reset procedure
The rating operating voltage of the rated direct voltage and power module that flow device obtains the 3rd NHInitial value and the 3rd NFInitial value, specifically
Including：
When the mixed type transverter needs to meet DC line fault self-cleaning constraints, if by being latched the change of current
The mode of device removes DC line fault, then is calculated according to following formula and obtain the 3rd NHInitial value and the 3rd NFInitial value：
Or
If removing DC line fault by way of generating backward voltage, is calculated according to following formula and obtain the 3rd NH
Initial value and the 3rd NFInitial value：
Or
Wherein, U is the amplitude of ac bus phase voltage, UACFor the mixed type change of current described in DC line fault reset procedure
The amplitude of the ac phase voltage of device output, UDCFor the rated direct voltage of the mixed type transverter, USMFor the volume of power module
Determine working voltage, β is the amplitude that the mixed type transverter generates backward voltage.
Further, the amplitude of the ac phase voltage of the output of mixed type transverter described in DC line fault reset procedure
UACIt is calculated and is obtained according to following formula：
Wherein, k is the no-load voltage ratio of transformer, and Q is flexible direct current converter station injection exchange in DC line fault reset procedure
The reactive power of system, R0For total equivalent loss resistance of transformer, bridge arm reactor and converter valve, ω0For power frequency angular frequency,
LTFor the short-circuit impedance value of transformer conversion to converter valve side, L is the inductance value of bridge arm reactor.
Further, it is described when the mixed type transverter need to meet valve group throw online move back constraints when, according to valve
Group, which is thrown, moves back the mixed type transverter output during moving back of the power-factor angle of the mixed type transverter, valve group throwing in the process
The rating operating voltage of the amplitude of ac phase voltage, the rated direct voltage of the mixed type transverter and power module obtains the
Four NHInitial value and the 4th NFInitial value, specially：
When the mixed type transverter need to meet valve group throw online move back constraints when, calculated and obtained according to following formula
4th NHInitial value and the 4th NFInitial value：
Or
Wherein, The power factor of the mixed type transverter during moving back is thrown for valve group
Angle, UACThe amplitude of the ac phase voltage of the mixed type transverter output during moving back, U are thrown for valve groupDCIt is changed for the mixed type
Flow the rated direct voltage of device, USMFor the rating operating voltage of power module.
Further, valve group throws the amplitude U for moving back the ac phase voltage of the mixed type transverter output in the processACAccording to
Lower formula, which calculates, to be obtained：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, IDCFor the volume of the mixed type transverter
Determine DC current, R0For total equivalent loss resistance of transformer, bridge arm reactor and converter valve, Q is soft during valve group throwing is moved back
Property DC converter station injection AC system reactive power, ω0For power frequency angular frequency, LTFor transformer conversion to converter valve side
Short-circuit impedance value, L are the inductance value of bridge arm reactor.
Further, described according to the first NHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NHInitial value
At least one of obtain NHEnd value, and according to the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NF
At least one of initial value obtains NFEnd value, specifically include：
Choose the first NHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NHAt least one of initial value is made
For NHTarget initial value, and choose the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFIn initial value
It is at least one to be used as NFTarget initial value；
According to NHTarget initial value in minimum value determine NHEnd value, and according to NFTarget initial value in most
Big value determines NFEnd value.
Compared with prior art, an embodiment of the present invention provides a kind of design sides of power module in mixed type transverter
Method, mixed type transverter include NHA half-bridge power module and NFA full bridge power module, when needing to meet output voltage constraint
It is corresponding to obtain the first N when conditionHInitial value and the first NFInitial value；It is right when needing to meet DC decompression operation constraints
The 2nd N should be obtainedHInitial value and the 2nd NFInitial value；When needing to meet DC line fault self-cleaning constraints, correspondence obtains
Obtain the 3rd NHInitial value and the 3rd NFInitial value；When need to meet valve group throw online move back constraints when, it is corresponding to obtain the 4th NHJust
Initial value and the 4th NFInitial value；According to the N of acquisitionHAt least one of initial value obtain NHEnd value, and according to acquisition
NFAt least one of initial value obtain NFEnd value, can be determined in mixed type transverter according to different application demands
The quantity of half-bridge power module and full bridge power module.
Description of the drawings
Fig. 1 is a preferred embodiment of the design method of power module in a kind of mixed type transverter provided by the invention
Flow chart；
Fig. 2 is a kind of circuit diagram of the topological structure of mixed type transverter provided by the invention.
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 all without creative efforts
Other embodiment shall fall within the protection scope of the present invention.
It is shown in Figure 1, it is one of the design method of power module in a kind of mixed type transverter provided by the invention
The flow chart of preferred embodiment, the mixed type transverter includes NHA half-bridge power module and NFA full bridge power module, including
Step S11 to step S15：
Step S11, when the mixed type transverter needs to meet output voltage constraints, according to institute under rated power
State the amplitude of the ac phase voltage of mixed type transverter output, the rated direct voltage and power module of the mixed type transverter
Rating operating voltage obtain the first NHInitial value and the first NFInitial value；
Step S12, when the mixed type transverter needs to meet DC decompression operation constraints, according to DC decompression
Amplitude, the mixed type of the amplitude of operation, the DC decompression ac phase voltage that the mixed type transverter exports when running are changed
The rating operating voltage of the rated direct voltage and power module that flow device obtains the 2nd NHInitial value and the 2nd NFInitial value；
Step S13, when the mixed type transverter needs to meet DC line fault self-cleaning constraints, according to straight
The amplitude of the ac phase voltage of mixed type transverter output during Flow Line fault clearance, the mixed type transverter
The rating operating voltage of rated direct voltage and power module obtains the 3rd NHInitial value and the 3rd NFInitial value；
Step S14, when the mixed type transverter need to meet valve group throw online move back constraints when, moved back according to valve group throwing
The power-factor angle of the mixed type transverter, valve group throw the exchange phase for moving back the mixed type transverter output in the process in the process
The rating operating voltage of the amplitude of voltage, the rated direct voltage of the mixed type transverter and power module obtains the 4th NHJust
Initial value and the 4th NFInitial value；
Step S15, according to the first NHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NHIn initial value extremely
Few acquisition NHEnd value, and according to the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFInitial value
At least one of obtain NFEnd value.
It is a kind of circuit diagram of the topological structure of mixed type transverter provided by the invention in conjunction with shown in Fig. 2, mixing
Type transverter includes 6 bridge arms, and the topological structure of each bridge arm is identical, by a converter valve and a bridge arm reactor series connection
Composition, each converter valve is formed by a certain proportion of half-bridge power module and full bridge power module-cascade, in mixed type transverter
Include N altogetherHA identical half-bridge power module and NFA identical full bridge power module.
In order to meet mixed type transverter ac output voltage requirement, can be according to the mixed type change of current under rated power
Amplitude, the rated direct voltage of mixed type transverter and the rating operating voltage of power module of the ac phase voltage of device output obtain
Obtain the first N of the quantity of half-bridge power moduleHFirst N of the quantity of initial value and full bridge power moduleFInitial value.
It, can be according to amplitude that DC decompression is run, straight in order to meet the requirement of mixed type transverter DC decompression operation
The amplitude for the ac phase voltage that mixed type transverter exports when flowing brownout operation, the rated direct voltage and work(of mixed type transverter
The rating operating voltage of rate module obtains the 2nd N of the quantity of half-bridge power moduleHThe quantity of initial value and full bridge power module
The 2nd NFInitial value.
In order to meet the requirement of mixed type transverter DC line fault self-cleaning, can be removed according to DC line fault
The amplitude for the ac phase voltage that mixed type transverter exports in the process, the rated direct voltage and power module of mixed type transverter
Rating operating voltage obtain half-bridge power module quantity the 3rd NH3rd N of the quantity of initial value and full bridge power moduleF
Initial value.
The requirement moved back is thrown online in order to meet mixed type transverter valve group, and mixed type during moving back can be thrown according to valve group and is changed
Flow the power-factor angle of device, valve group throws the amplitude for the ac phase voltage that mixed type transverter exports during moving back, the mixed type change of current
The rated direct voltage of device and the rating operating voltage of power module obtain the 4th N of the quantity of half-bridge power moduleHInitial value
With the 4th N of the quantity of full bridge power moduleFInitial value.
According to the first N of the quantity of half-bridge power moduleHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NH
At least one of initial value determines the quantity N of half-bridge power moduleHEnd value, according to the of the quantity of full bridge power module
One NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFAt least one of initial value determines full bridge power module
Quantity NFEnd value.
For example, if mixed type transverter need and meanwhile meet ac output voltage requirement and DC line fault from clear
The requirement removed, then according to the first N of the quantity of the corresponding half-bridge power module obtainedHInitial value and the 3rd NHInitial value determines half
The quantity N of bridge power moduleHEnd value, according to the first N of the quantity of the corresponding full bridge power module obtainedFInitial value and
Three NFInitial value determines the quantity N of full bridge power moduleFEnd value.
The design method of power module, defeated when needing to meet in a kind of mixed type transverter that the embodiment of the present invention is provided
It is corresponding to obtain the first N when going out voltage constraintsHInitial value and the first NFInitial value；When needing to meet DC decompression operation constraint
It is corresponding to obtain the 2nd N when conditionHInitial value and the 2nd NFInitial value；When needing to meet DC line fault self-cleaning constraints
When, it is corresponding to obtain the 3rd NHInitial value and the 3rd NFInitial value；When need to meet valve group throw online move back constraints when, correspondence obtains
Obtain the 4th NHInitial value and the 4th NFInitial value；According to the N of acquisitionHAt least one of initial value obtain NHEnd value, and
According to the N of acquisitionFAt least one of initial value obtain NFEnd value, can according to different application demands determine mix
The quantity of half-bridge power module and full bridge power module in type transverter.
In a further advantageous embodiment, described when the mixed type transverter needs to meet output voltage constraints
When, according to the amplitude for the ac phase voltage that the mixed type transverter exports under rated power, the volume of the mixed type transverter
The rating operating voltage for determining DC voltage and power module obtains the first NHInitial value and the first NFInitial value, specially：
When the mixed type transverter needs to meet preset active power and reactive power output area, according to following
Formula, which calculates, obtains the first NHInitial value and the first NFInitial value：
Or
Wherein, UACFor the amplitude of the ac phase voltage of the mixed type transverter output under rated power, UDCIt is described mixed
The rated direct voltage of mould assembly transverter, USMFor the rating operating voltage of power module.
It should be noted that the specified operation of the half-bridge power module and full bridge power module in all embodiments of the invention
Voltage is identical, is USM。
In another preferred embodiment, the amplitude of the ac phase voltage of the mixed type transverter output under rated power
UACIt is calculated and is obtained according to following formula：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, and P, Q are respectively flexible under rated power
DC converter station injects the active power and reactive power of AC system, R0For the total of transformer, bridge arm reactor and converter valve
Equivalent loss resistance, ω0For power frequency angular frequency, LTFor the short-circuit impedance value of transformer conversion to converter valve side, L is bridge arm reactance
The inductance value of device.
It is described when the mixed type transverter needs to meet DC decompression operation constraint item in another preferred embodiment
When part, the ac phase voltage of mixed type transverter output when being run according to the amplitude of DC decompression operation, DC decompression
The rating operating voltage of amplitude, the rated direct voltage of the mixed type transverter and power module obtains the 2nd NHInitial value and
2nd NFInitial value, specially：
When the mixed type transverter needs to meet DC decompression operation constraints, is calculated and obtained according to following formula
2nd NHInitial value and the 2nd NFInitial value：
Or
Wherein, α is the amplitude of DC decompression operation, generally 70%~80%, UACIt is described mixed when being run for DC decompression
The amplitude of the ac phase voltage of mould assembly transverter output, UDCFor the rated direct voltage of the mixed type transverter, USMFor power
The rating operating voltage of module.
In another preferred embodiment, DC decompression ac phase voltage of mixed type transverter output when running
Amplitude UACIt is calculated and is obtained according to following formula：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, when P, Q are respectively DC decompression operation
Flexible direct current converter station injects the active power and reactive power of AC system, R0For transformer, bridge arm reactor and converter valve
Total equivalent loss resistance, ω0For power frequency angular frequency, LTBe transformer conversion to converter valve side short-circuit impedance value, L is bridge arm
The inductance value of reactor.
It is described when the mixed type transverter needs to meet DC line fault self-cleaning in another preferred embodiment
When constraints, according to mixed type transverter described in DC line fault reset procedure output ac phase voltage amplitude,
The rated direct voltage of the mixed type transverter and the rating operating voltage of power module obtain the 3rd NHInitial value and the 3rd NF
Initial value specifically includes：
When the mixed type transverter needs to meet DC line fault self-cleaning constraints, if by being latched the change of current
The mode of device removes DC line fault, then is calculated according to following formula and obtain the 3rd NHInitial value and the 3rd NFInitial value：
Or
If removing DC line fault by way of generating backward voltage, is calculated according to following formula and obtain the 3rd NH
Initial value and the 3rd NFInitial value：
Or
Wherein, U is the amplitude of ac bus phase voltage, UACFor the mixed type change of current described in DC line fault reset procedure
The amplitude of the ac phase voltage of device output, UDCFor the rated direct voltage of the mixed type transverter, USMFor the volume of power module
Determine working voltage, β is the amplitude that the mixed type transverter generates backward voltage.
It should be noted that locking transverter and generation backward voltage are the two ways for removing DC line fault,
It is latched under the mode of transverter, what the switching device in mixed type transverter was all off；Under the mode for generating backward voltage,
Switching device in mixed type transverter turns on and off behavior accordingly according to control instruction progress, exports corresponding voltage.
In another preferred embodiment, the exchange of the output of mixed type transverter described in DC line fault reset procedure
The amplitude U of phase voltageACIt is calculated and is obtained according to following formula：
Wherein, k is the no-load voltage ratio of transformer, and Q is flexible direct current converter station injection exchange in DC line fault reset procedure
The reactive power of system, R0For total equivalent loss resistance of transformer, bridge arm reactor and converter valve, ω0For power frequency angular frequency,
LTFor the short-circuit impedance value of transformer conversion to converter valve side, L is the inductance value of bridge arm reactor.
It is described to move back constraint item when the mixed type transverter needs to meet valve group and throws online in another preferred embodiment
When part, the power-factor angle of the mixed type transverter during moving back is thrown according to valve group, the mixed type in the process is moved back in valve group throwing
Amplitude, the rated direct voltage of the mixed type transverter and the specified fortune of power module of the ac phase voltage of transverter output
Row voltage obtains the 4th NHInitial value and the 4th NFInitial value, specially：
When the mixed type transverter need to meet valve group throw online move back constraints when, calculated and obtained according to following formula
4th NHInitial value and the 4th NFInitial value：
Or
Wherein, The power factor of the mixed type transverter during moving back is thrown for valve group
Angle, UACThe amplitude of the ac phase voltage of the mixed type transverter output during moving back, U are thrown for valve groupDCIt is changed for the mixed type
Flow the rated direct voltage of device, USMFor the rating operating voltage of power module.
In another preferred embodiment, valve group throws the ac phase voltage for moving back that the mixed type transverter exports in the process
Amplitude UACIt is calculated and is obtained according to following formula：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, IDCFor the volume of the mixed type transverter
Determine DC current, R0For total equivalent loss resistance of transformer, bridge arm reactor and converter valve, Q is soft during valve group throwing is moved back
Property DC converter station injection AC system reactive power, ω0For power frequency angular frequency, LTFor transformer conversion to converter valve side
Short-circuit impedance value, L are the inductance value of bridge arm reactor.
It is described according to the first N in another preferred embodimentHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and
4th NHAt least one of initial value obtains NHEnd value, and according to the first NFInitial value, the 2nd NFInitial value, the 3rd NFJust
Initial value and the 4th NFAt least one of initial value obtains NFEnd value, specifically include：
Choose the first NHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NHAt least one of initial value is made
For NHTarget initial value, and choose the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFIn initial value
It is at least one to be used as NFTarget initial value；
According to NHTarget initial value in minimum value determine NHEnd value, and according to NFTarget initial value in most
Big value determines NFEnd value.
For example, if mixed type transverter only needs the requirement for meeting DC decompression operation, corresponding half obtained is selected
2nd N of the quantity of bridge power moduleHInitial value is as NHTarget initial value, due to NHTarget initial value only there are one, because
This is by the 2nd NHQuantity N of the initial value as half-bridge power moduleHEnd value；The corresponding full bridge power module obtained of selection
2nd N of quantityFInitial value is as NFTarget initial value, similarly, due to NFTarget initial value only there are one, therefore by the
Two NFQuantity N of the initial value as full bridge power moduleFEnd value.
If mixed type transverter needs while meeting ac output voltage, DC decompression operation, DC line fault certainly
It removes and valve group throws the requirement moved back online, then the first N of the quantity of the corresponding half-bridge power module obtainedHInitial value, the 2nd NHJust
Initial value, the 3rd NHInitial value and the 4th NHInitial value is NHTarget initial value, by NHTarget initial value in minimum value make
For the quantity N of half-bridge power moduleHEnd value；Similarly, the full bridge power module obtained is corresponded to according to different application demands
Quantity the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFInitial value is NFTarget initial value,
By NFTarget initial value in quantity N of the maximum value as full bridge power moduleFEnd value.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. the design method of power module in a kind of mixed type transverter, which is characterized in that the mixed type transverter includes NHIt is a
Half-bridge power module and NFA full bridge power module, including：
When the mixed type transverter needs to meet output voltage constraints, according to the mixed type change of current under rated power
The amplitude of ac phase voltage of device output, the specified operation electricity of the rated direct voltage of the mixed type transverter and power module
Pressure obtains the first NHInitial value and the first NFInitial value；
When the mixed type transverter, which needs to meet DC decompression, runs constraints, according to the amplitude of DC decompression operation,
The amplitude of the ac phase voltage of mixed type transverter output when DC decompression is run, the mixed type transverter it is specified straight
Galvanic electricity is pressed and the rating operating voltage of power module obtains the 2nd NHInitial value and the 2nd NFInitial value；
It is clear according to DC line fault when the mixed type transverter needs to meet DC line fault self-cleaning constraints
Except the amplitude for the ac phase voltage that the mixed type transverter exports in the process, the rated direct voltage of the mixed type transverter
The 3rd N is obtained with the rating operating voltage of power moduleHInitial value and the 3rd NFInitial value；
When the mixed type transverter need to meet valve group throw online move back constraints when, it is described mixed during being moved back according to valve group throwing
The amplitude for the ac phase voltage that the mixed type transverter exports during the power-factor angle of mould assembly transverter, valve group throwing are moved back,
The rated direct voltage of the mixed type transverter and the rating operating voltage of power module obtain the 4th NHInitial value and the 4th NF
Initial value；
According to the first NHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NHAt least one of initial value obtains NH
End value, and according to the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFAt least one in initial value
A acquisition NFEnd value.
2. the design method of power module in mixed type transverter as described in claim 1, which is characterized in that described when described
When mixed type transverter needs to meet output voltage constraints, according to the friendship of the mixed type transverter output under rated power
The rating operating voltage for flowing the amplitude of phase voltage, the rated direct voltage of the mixed type transverter and power module obtains first
NHInitial value and the first NFInitial value, specially：
When the mixed type transverter needs to meet preset active power and reactive power output area, according to following formula
It calculates and obtains the first NHInitial value and the first NFInitial value：
Or
Wherein, UACFor the amplitude of the ac phase voltage of the mixed type transverter output under rated power, UDCFor the mixed type
The rated direct voltage of transverter, USMFor the rating operating voltage of power module.
3. the design method of power module in mixed type transverter as claimed in claim 2, which is characterized in that under rated power
The amplitude U of the ac phase voltage of the mixed type transverter outputACIt is calculated and is obtained according to following formula：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, and P, Q are respectively flexible direct current under rated power
Current conversion station injects the active power and reactive power of AC system, R0For the total equivalent of transformer, bridge arm reactor and converter valve
Loss resistance, ω0For power frequency angular frequency, LTFor the short-circuit impedance value of transformer conversion to converter valve side, L is bridge arm reactor
Inductance value.
4. the design method of power module in mixed type transverter as described in claim 1, which is characterized in that described when described
When mixed type transverter needs to meet DC decompression operation constraints, transported according to the amplitude of DC decompression operation, DC decompression
The amplitude for the ac phase voltage that the mixed type transverter exports when row, the rated direct voltage and work(of the mixed type transverter
The rating operating voltage of rate module obtains the 2nd NHInitial value and the 2nd NFInitial value, specially：
When the mixed type transverter needs to meet DC decompression operation constraints, is calculated according to following formula and obtain second
NHInitial value and the 2nd NFInitial value：
Or
Wherein, α is the amplitude of DC decompression operation, generally 70%~80%, UACMixed type when being run for DC decompression
The amplitude of the ac phase voltage of transverter output, UDCFor the rated direct voltage of the mixed type transverter, USMFor power module
Rating operating voltage.
5. the design method of power module in mixed type transverter as claimed in claim 4, which is characterized in that DC decompression is transported
The amplitude U of the ac phase voltage of mixed type transverter output when rowACIt is calculated and is obtained according to following formula：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, and P, Q are flexible when being respectively DC decompression operation
DC converter station injects the active power and reactive power of AC system, R0For the total of transformer, bridge arm reactor and converter valve
Equivalent loss resistance, ω0For power frequency angular frequency, LTFor the short-circuit impedance value of transformer conversion to converter valve side, L is bridge arm reactance
The inductance value of device.
6. the design method of power module in mixed type transverter as described in claim 1, which is characterized in that described when described
When mixed type transverter needs to meet DC line fault self-cleaning constraints, according to institute in DC line fault reset procedure
State the amplitude of the ac phase voltage of mixed type transverter output, the rated direct voltage and power module of the mixed type transverter
Rating operating voltage obtain the 3rd NHInitial value and the 3rd NFInitial value specifically includes：
When the mixed type transverter needs to meet DC line fault self-cleaning constraints, if by being latched transverter
Mode removes DC line fault, then is calculated according to following formula and obtain the 3rd NHInitial value and the 3rd NFInitial value：
Or
If removing DC line fault by way of generating backward voltage, is calculated according to following formula and obtain the 3rd NHInitially
Value and the 3rd NFInitial value：
Or
Wherein, U is the amplitude of ac bus phase voltage, UACIt is defeated for mixed type transverter described in DC line fault reset procedure
The amplitude of the ac phase voltage gone out, UDCFor the rated direct voltage of the mixed type transverter, USMFor the specified fortune of power module
Row voltage, β are the amplitude that the mixed type transverter generates backward voltage.
7. the design method of power module in mixed type transverter as claimed in claim 6, which is characterized in that DC line event
Hinder the amplitude U of the ac phase voltage of mixed type transverter output described in reset procedureACIt is calculated and is obtained according to following formula：
Wherein, k is the no-load voltage ratio of transformer, and Q is that flexible direct current converter station injects AC system in DC line fault reset procedure
Reactive power, R0For total equivalent loss resistance of transformer, bridge arm reactor and converter valve, ω0For power frequency angular frequency, LTFor
Transformer converts the short-circuit impedance value to converter valve side, and L is the inductance value of bridge arm reactor.
8. the design method of power module in mixed type transverter as described in claim 1, which is characterized in that described when described
Mixed type transverter needs to meet valve group and throws online when moving back constraints, the mixed type transverter during being moved back according to valve group throwing
Power-factor angle, valve group throw amplitude, the mixed type of the ac phase voltage of mixed type transverter output during moving back
The rated direct voltage of transverter and the rating operating voltage of power module obtain the 4th NHInitial value and the 4th NFInitial value, tool
Body is：
When the mixed type transverter need to meet valve group throw online move back constraints when, calculated according to following formula and obtain the 4th
NHInitial value and the 4th NFInitial value：
Or
Wherein, The power-factor angle of the mixed type transverter during moving back, U are thrown for valve groupAC
The amplitude of the ac phase voltage of the mixed type transverter output during moving back, U are thrown for valve groupDCFor the mixed type transverter
Rated direct voltage, USMFor the rating operating voltage of power module.
9. the design method of power module in mixed type transverter as claimed in claim 8, which is characterized in that valve group throwing was moved back
The amplitude U of the ac phase voltage of the output of mixed type transverter described in journeyACIt is calculated and is obtained according to following formula：
Wherein, U is the amplitude of ac bus phase voltage, and k is the no-load voltage ratio of transformer, IDCFor the specified straight of the mixed type transverter
Galvanic electricity stream, R0For total equivalent loss resistance of transformer, bridge arm reactor and converter valve, Q is flexible straight during valve group throwing is moved back
Flow the reactive power of current conversion station injection AC system, ω0For power frequency angular frequency, LTFor the short circuit of transformer conversion to converter valve side
Impedance value, L are the inductance value of bridge arm reactor.
10. the design method of power module in mixed type transverter as described in claim 1, which is characterized in that the basis
First NHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NHAt least one of initial value obtains NHEnd value,
And according to the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFAt least one of initial value obtains NF's
End value specifically includes：
Choose the first NHInitial value, the 2nd NHInitial value, the 3rd NHInitial value and the 4th NHAt least one of initial value is used as NH
Target initial value, and choose the first NFInitial value, the 2nd NFInitial value, the 3rd NFInitial value and the 4th NFIn initial value extremely
Few one is used as NFTarget initial value；
According to NHTarget initial value in minimum value determine NHEnd value, and according to NFTarget initial value in maximum value
Determine NFEnd value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810264010.4A CN108365625B (en) | 2018-03-28 | 2018-03-28 | Design method of power module in hybrid converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810264010.4A CN108365625B (en) | 2018-03-28 | 2018-03-28 | Design method of power module in hybrid converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108365625A true CN108365625A (en) | 2018-08-03 |
| CN108365625B CN108365625B (en) | 2020-05-08 |
Family
ID=63001876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810264010.4A Active CN108365625B (en) | 2018-03-28 | 2018-03-28 | Design method of power module in hybrid converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108365625B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820671A (en) * | 2012-08-09 | 2012-12-12 | 清华大学 | Method for calculating sub-module quantity in bridge arm of modular multi-level current converter |
| CN105119510A (en) * | 2015-08-27 | 2015-12-02 | 南方电网科学研究院有限责任公司 | Hybrid cascade multi-level transverter capacitance-voltage balance method and system |
| US20170346407A1 (en) * | 2014-12-29 | 2017-11-30 | Hyosung Corporation | Power control apparatus for sub-module of mmc converter |
| CN107846036A (en) * | 2017-11-02 | 2018-03-27 | 南方电网科学研究院有限责任公司 | High pressure flexible direct current transmission system and its major loop equipment determine method |
-
2018
- 2018-03-28 CN CN201810264010.4A patent/CN108365625B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820671A (en) * | 2012-08-09 | 2012-12-12 | 清华大学 | Method for calculating sub-module quantity in bridge arm of modular multi-level current converter |
| US20170346407A1 (en) * | 2014-12-29 | 2017-11-30 | Hyosung Corporation | Power control apparatus for sub-module of mmc converter |
| CN105119510A (en) * | 2015-08-27 | 2015-12-02 | 南方电网科学研究院有限责任公司 | Hybrid cascade multi-level transverter capacitance-voltage balance method and system |
| CN107846036A (en) * | 2017-11-02 | 2018-03-27 | 南方电网科学研究院有限责任公司 | High pressure flexible direct current transmission system and its major loop equipment determine method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108365625B (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108539796B (en) | Fault ride-through and energy dissipation control method for wind power bipolar flexible direct current power grid | |
| CN103904635B (en) | A kind of topological structure of multiport direct current transformer station and control method thereof | |
| CN208738855U (en) | A kind of bipolar soft straight network system of wind-powered electricity generation | |
| CN106786713B (en) | A kind of voltage source converter unit topological structure and control method | |
| CN105429165B (en) | A kind of multiterminal Hybrid HVDC system topological and control method to the power supply of more drop point passive networks | |
| CN102427243B (en) | Multi-terminal DC (Direct Current) power transmission system for combined synchronization of wind power plant and conventional power plant | |
| CN110086198A (en) | A kind of multiterminal Hybrid HVDC system grid-connected suitable for offshore wind farm and starting control method | |
| WO2017084120A1 (en) | Unidirectional direct current-direct current autotransformer, and high-low voltage side fault isolation method therefor | |
| CN106505641A (en) | The AC/DC decoupling control method of modularization multi-level converter and its application | |
| CN104753079B (en) | A kind of Hybrid HVDC system of achievable anti-power delivery | |
| WO2021189754A1 (en) | Offshore wind power dc transmission system employing two connected transformers, and control method therefor | |
| WO2018098673A1 (en) | Bipolar vsc-hvdc and upfc hybrid topology structure and operating method therefor | |
| CN106208128A (en) | A kind of power reverses method of mixing three end HVDC transmission systems | |
| CN109347144A (en) | A kind of low-voltage ride-through method of wind-powered electricity generation flexible direct current transmitting system | |
| WO2019096048A1 (en) | Method and system for controlling energy consumption means of converter | |
| CN107732954A (en) | A kind of online input control method and device of voltage source converter unit | |
| CN108923450B (en) | Control and operation method of current source type high-voltage direct-current transmission system | |
| CN113708654A (en) | Flexible direct-current converter valve integrating surplus power dissipation function and control method | |
| CN105633994A (en) | Starting method of FMMC-LCC hybrid DC power transmission system | |
| CN108365625A (en) | The design method of power module in a kind of mixed type transverter | |
| CN108964111B (en) | Direct-current power transmission system with medium-voltage side direct-current outgoing line and control method thereof | |
| CN108808716A (en) | A kind of extra-high voltage Hybrid HVDC system load flow inverts control method online | |
| CN208046465U (en) | A kind of modified is double to clamp submodule and modularization multi-level converter | |
| Wu et al. | A hybrid HVDC converter based on MMC and diode rectifier for offshore wind farm integration | |
| Rogersten et al. | A quantitative method for the assessment of VSC-HVdc controller simulations in EMT tools |
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 |