CN110138240A - Electric power electric transformer high-pressure side dc-link capacitance pre-charge method - Google Patents
Electric power electric transformer high-pressure side dc-link capacitance pre-charge method Download PDFInfo
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- CN110138240A CN110138240A CN201910421501.XA CN201910421501A CN110138240A CN 110138240 A CN110138240 A CN 110138240A CN 201910421501 A CN201910421501 A CN 201910421501A CN 110138240 A CN110138240 A CN 110138240A
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Classifications
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- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/0074—Plural converter units whose inputs are connected in series
Abstract
A kind of electric power electric transformer high-pressure side dc-link capacitance pre-charge method, first locking each H bridging parallel operation of 3-phase power converter input stage, while DAB converter is unlocked, high and low pressure side capacitor is pre-charged by AC network and pre-charge resistance.It is to be charged it is in stable condition after, bypass pre-charge resistance R1, R2 and R3, according to voltage on line side and high and low pressure side dc-link capacitance load voltage value, unlock and the in turn a certain number of H bridging parallel operations of bypass input grade simultaneously, in the process isolated form series resonance-type DAB keep unlocked state, until high-low pressure dc-link capacitance voltage can equilibrium be charged to rated value.
Description
Technical field
The present invention relates to a kind of electric power electric transformer high-pressure side dc-link capacitance pre-charge methods.
Background technique
Electronic transformer is a kind of novel electric energy converting equipment, it not only has electricity possessed by traditional power transformer
The basic functions such as buckling changes, electrical isolation and energy transmission, additionally it is possible to realize the adjusting of power quality, the control of system load flow and
Other additional functions such as reactive power compensation.Why electric power electric transformer can be realized these additional functions, mainly because
It is it by introducing Technics of Power Electronic Conversion technology and control technology, it can be to the voltage or current of the primary and secondary side of transformer
Amplitude, phase flexibly handled and controlled, and can be controlled according to actual needs the trend of system.Thus
More stable and flexible transmission of electricity may be implemented in electric power electric transformer, can solve many in the presence of current electric system
The prospect of problem, application also will be very wide.
Electric power electric transformer is before normal operation, it is necessary first to charge to high-pressure side and low-pressure side dc-link capacitance.
Existing charging method can be that dc-link capacitance charges using charging circuit in low-pressure side, such as patent CN201811473271,
But it needs additionally to increase a set of independent charging circuit, this also allows for system and becomes more complicated.High pressure friendship can also be used
Galvanic electricity net is capacitor charging, and such as CN103973094B, operation implementation is more convenient, and technology relative maturity, but this method can not
Bus capacitor voltage is charged to rated value.For electric power electric transformer, the method for existing charging still remains charging unit
Complicated, the problems such as bus capacitor voltage can not be charged to rated value, the big price of charging equipment volume is high.
Summary of the invention
It is an object of the invention to overcome prior art disadvantage, propose a kind of straight suitable for electric power electric transformer high-pressure side
Flow bus capacitor pre-charge method.The present invention by electric power electric transformer high-pressure side do not control charging in the way of, pass through other in turn
The a certain number of modules in road charge for dc-link capacitances at different levels.Control mode of the present invention is relatively easy, and high-pressure side and low pressure
Side dc-link capacitance voltage can equilibrium be charged to rated value.
Unsteady flow is cascaded with C phase by A phase cascade converter, B phase cascade converter using electric power electric transformer of the invention
Device composition.A phase cascade converter, B phase cascade converter and C phase cascade converter pass through inductance L respectivelygA、LgB、LgC, three-phase it is high
Press A.C. contactor S2, charging resistor R1、R2、R3With three-phase high-voltage A.C. contactor S1It is connected to three phase network, charging resistor R1、
R2、R3It is serially connected in three-phase high-voltage A.C. contactor S1With three-phase high-voltage A.C. contactor S2Between.A phase cascade converter, B phase grade
The output end of connection current transformer and C phase cascade converter is connected in parallel, and connect with low-voltage direct P, N-terminal.
The A phase cascade converter, B phase cascade converter are identical with the structure of C phase cascade converter, by N number of function
Rate module-cascade composition, N is positive integer.N number of power module input terminal is cascaded, and output end is connected in parallel.Each function
Rate module is made of 1 H bridging parallel operation and 1 DAB converter connection.The H bridging parallel operation H of N number of power module1~HNInput
End constitutes the input terminal of N number of power module, the DAB converter DAB of N number of power module1~DABNOutput end constitute N number of power
The output end of module；The output end of N number of H bridging parallel operation connects capacitor CH1~CHNAfterwards with DAB converter DAB1~DABNInput
End is connected, DAB converter DAB1~DABNOutput end connect capacitor CL1~CLNAfter be connected in parallel, with low-voltage direct P, N-terminal
Connection.
A phase cascade converter filter inductance LgAOne end be connected to A phase H bridging parallel operation H1Ac terminal a, B phase cascade
Current transformer filter inductance LgBOne end be connected to B phase H bridging parallel operation H1Ac terminal a, C phase cascade converter filter inductance LgC
One end be connected to C phase H bridging parallel operation H1Ac terminal a；A phase cascade converter filter inductance LgAThe other end be connected to and fill
Resistance R1, B phase cascade converter filter inductance LgBThe other end be connected to charging resistor R2, C phase cascade converter filtered electrical
Feel LgCThe other end be connected to charging resistor R3.One end of three-phase high-voltage A.C. contactor S2 be respectively connected to charging resistor R1,
The other end of one end of charging resistor R2 and charging resistor R3, three-phase high-voltage A.C. contactor S2 is respectively connected to charging resistor
The other end of R1, charging resistor R2 and charging resistor R3；One end of three-phase high-voltage A.C. contactor S1 is respectively connected to A, B and C
Phase High-voltage AC Network, the other end of three-phase high-voltage A.C. contactor S1 be respectively connected to charging resistor R1, charging resistor R2 and
The other end of charging resistor R3.
In A phase cascade converter, B phase cascade converter and C phase cascade converter, the H bridging parallel operation H of power module1~HN
It is concatenated together, the ac terminal b of each H bridging parallel operation is connected with the ac terminal a of adjacent H bridging parallel operation, wherein A phase grade
Join the 1st H bridging parallel operation H of current transformer1Ac terminal a and inductance LgAOne end be connected, the 1st H of B phase cascade converter
Bridging parallel operation H1Ac terminal a and inductance LgBOne end be connected, the 1st H bridging parallel operation H of C phase cascade converter1Exchange
Terminal a and inductance LgCOne end be connected, n-th H bridging parallel operation HNAc terminal b be connected to electric power electric transformer star contact
W。
In A phase cascade converter, B phase cascade converter and C phase cascade converter, the H bridging parallel operation H of power module1~HN
Positive output terminals v pass through capacitor C respectivelyH1~CHNAnode and DAB converter DAB1~DABNInput terminal k be connected；H
Bridging parallel operation H1~HNNegative output terminals x pass through capacitor C respectivelyH1~CHNCathode and DAB converter DAB1~DABNIt is negative
Pole input terminal y is connected, DAB converter DAB1~DABNOutput end m be connected in parallel, connect with the end low-voltage direct P, DAB become
Parallel operation DAB1~DABNOutput end n be connected in parallel, connect with low-voltage direct N-terminal.
The DAB converter DAB1~DABNFor the double active bridge DAB of isolated form mode of resonance.
The step of electric power electric transformer high-pressure side dc-link capacitance pre-charge method of the present invention, is as follows:
1) three-phase high-voltage A.C. contactor S is disconnected2, the contactor S of closure three-phase high-voltage exchange side1, while unlocking cascade and becoming
Flow the DAB converter of device A phase cascade converter, B phase cascade converter and C phase cascade converter；
2) the DAB converter of A phase cascade converter, B phase cascade converter and C phase cascade converter is kept to be in unlock shape
State keeps the H bridging parallel operation H of A phase cascade converter, B phase cascade converter and C phase cascade converter1~HNIn latch like
State, to A phase cascade converter, the capacitor C of B phase cascade converter and C phase cascade converterHVoltage rise to UlineWhen/2N, the
The charging of one stage terminates.Wherein UlineFor the peak value of High-voltage AC Network line voltage.
3) after first stage charging, the H bridge of A phase cascade converter, B phase cascade converter and C phase cascade converter
In converter, according to the sequence of number from small to large, A phase cascade converter, B phase cascade converter is selected to cascade with C phase in turn
M cascaded H-bridges converter in current transformer is unlocked, and M is less than A phase cascade converter, B phase cascade converter is cascaded with C phase
The quantity N of the H bridging parallel operation of current transformer, wherein N is the quantity of H bridging parallel operation in every phase cascade converter；At this point, each mutually will
There is M capacitor CHIn bypass condition, voltage not will rise, remaining N-M H bridging parallel operation is in uncontrollable rectifier state, with N-M
The capacitor C of a H bridging parallel operation connectionHVoltage continuous rise；In entirely control cycle T c, Tc takes 1~10ms；Due to DAB
The effect of converter, the capacitor C in A phase cascade converter, B phase cascade converter and C phase cascade converterLVoltage will also continue
Go up, closed high A.C. contactor S2, so that in A phase cascade converter, B phase cascade converter and C phase cascade converter
Capacitor CHVoltage rises to rated value UH, capacitor CLVoltage rises to rated value UL。
In the step 3), the calculation formula for the H bridging parallel operation M that every phase unlocks every time are as follows:
Wherein, UHFor CH1~CHNCapacitance voltage rated value, UlineFor the peak value of High-voltage AC Network line voltage, N is A phase, B
The quantity of the H bridging parallel operation of phase and C phase cascade converter, wherein N is the quantity of every phase H bridging parallel operation.
The present invention by module rotation bypass in the way of for dc-link capacitances at different levels charge, control mode is relatively easy,
And high-pressure side and low-pressure side dc-link capacitance voltage can equilibrium be charged to rated value.
Compared with prior art, the invention has the following beneficial effects:
Compared with the existing recharge technique from low-pressure side, electric power electric transformer pre-charge method of the present invention avoids increasing
Add additional charge power supply and charging circuit, it is additional to increase charging equipment bulky, the reliability decrease that will lead to current transformer；
Present system uses opened loop control, and control mode is by a relatively simple, and pre-charge current impact is small；High-pressure side and low-pressure side are straight
Stream bus capacitor voltage can be charged to declared working condition operating value, so that equipment current on line side when being incorporated to AC network be made to impact
It is small.
Detailed description of the invention
Fig. 1 is electric power electric transformer circuit topology figure of the invention；
Fig. 2 is double active bridge DAB circuit topology figures of the invention；
Fig. 3 is cascaded H-bridges converter circuit topological diagram of the invention；
Fig. 4 is charging flow figure of the invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Unsteady flow is cascaded with C phase by A phase cascade converter, B phase cascade converter using electric power electric transformer of the invention
Device composition.A phase cascade converter, B phase cascade converter and C phase cascade converter pass through inductance L respectivelygA、LgB、LgC, three-phase it is high
Press A.C. contactor S2, charging resistor R1、R2、R3With three-phase high-voltage A.C. contactor S1It is connected to three phase network, charging resistor R1、
R2、R3It is serially connected in three-phase high-voltage A.C. contactor S1With three-phase high-voltage A.C. contactor S2Between.A phase cascade converter, B phase grade
The output end of connection current transformer and C phase cascade converter is connected in parallel, and connect with low-voltage direct P, N-terminal.
The A phase cascade converter, B phase cascade converter are identical with the structure of C phase cascade converter, by N number of function
Rate module-cascade composition, N is positive integer.The input terminal of N number of power module is cascaded, and the output end of N number of power module is simultaneously
It is linked togather.Each power module is made of 1 H bridging parallel operation and 1 DAB converter connection.The H bridging of N number of power module
Parallel operation H1~HNInput terminal constitute the input terminal of N number of power module, the output end of the DAB converter of N number of power module constitutes N
The output end of a module；The output end of N number of H bridging parallel operation connects capacitor CH1~CHNAfterwards with DAB converter DAB1~DABNIt is defeated
Enter end to be connected, DAB converter DAB1~DABNOutput end connect capacitor CL1~CLNAfter be connected in parallel, with low-voltage direct P, N
End connection.
A phase cascade converter filter inductance LgAOne end be connected to A phase H bridging parallel operation H1Ac terminal a, B phase cascade
Current transformer filter inductance LgBOne end be connected to B phase H bridging parallel operation H1Ac terminal a, C phase cascade converter filter inductance LgC
One end be connected to C phase H bridging parallel operation H1Ac terminal a；A phase cascade converter filter inductance LgAThe other end be connected to and fill
Resistance R1, B phase cascade converter filter inductance LgBThe other end be connected to charging resistor R2, C phase cascade converter filtered electrical
Feel LgCThe other end be connected to charging resistor R3.One end of three-phase high-voltage A.C. contactor S2 be respectively connected to charging resistor R1,
The other end of one end of charging resistor R2 and charging resistor R3, three-phase high-voltage A.C. contactor S2 is respectively connected to charging resistor
The other end of R1, charging resistor R2 and charging resistor R3；One end of three-phase high-voltage A.C. contactor S1 is respectively connected to A, B and C
Phase High-voltage AC Network, the other end of three-phase high-voltage A.C. contactor S1 be respectively connected to charging resistor R1, charging resistor R2 and
The other end of charging resistor R3.
In A phase cascade converter, B phase cascade converter and C phase cascade converter, the H bridging parallel operation H of power module1~HN
It is concatenated together, the ac terminal b of each H bridging parallel operation is connected with the ac terminal a of adjacent H bridging parallel operation, wherein A phase grade
Join the 1st H bridging parallel operation H of current transformer1Ac terminal a and inductance LgAOne end be connected, the 1st H of B phase cascade converter
Bridging parallel operation H1Ac terminal a and inductance LgBOne end be connected, the 1st H bridging parallel operation H of C phase cascade converter1Exchange
Terminal a and inductance LgCOne end be connected, n-th H bridging parallel operation HNAc terminal b be connected to electric power electric transformer star contact
W。
In A phase cascade converter, B phase cascade converter and C phase cascade converter, the H bridging parallel operation H of power module1~HN
Positive output terminals v be separately connected capacitor CH1~CHNAnode, then again with DAB converter DAB1~DABNInput terminal
K is connected；The H bridging parallel operation H of power module1~HNNegative output terminals x connection capacitor CH1~CHNCathode, then again and
DAB1~DABNThe negative input terminal y of converter is connected, DAB converter DAB1~DABNOutput end m be connected in parallel with it is low
The connection of the straightening end stream P, DAB1~DABNThe output end n of converter is connected in parallel to be connect with low-voltage direct N-terminal.
The DAB converter DAB1~DABNFor the double active bridge DAB of isolated form mode of resonance.
The step of electric power electric transformer high-pressure side dc-link capacitance pre-charge method of the present invention, is as follows:
1) three-phase high-voltage A.C. contactor S is disconnected2, the contactor S of closure three-phase high-voltage exchange side1, while unlocking cascade and becoming
Flow the DAB converter of device A phase, B phase and C phase；
2) it keeps the DAB converter of A phase, B phase and C phase cascade converter in the unlocked state, keeps A phase, B phase and C phase
The H bridging parallel operation H of cascade converter1~HNCapacitor C in blocking, to A phase, B phase and C phase cascade converterHVoltage
Rise to UlineWhen/2N, first stage charging terminates, wherein UlineFor the peak value of High-voltage AC Network line voltage.
3) after first stage charging, in the H bridging parallel operation of A phase, B phase and C phase cascade converter, according to number from small
To big sequence, M cascaded H-bridges converter in A phase, B phase and C phase cascade converter is selected to be unlocked in turn, M is less than A
The H bridging parallel operation quantity N of phase, B phase and C phase cascade converter, wherein N is the quantity of every phase H bridging parallel operation；At this point, respectively mutually having
M capacitor CHIn bypass condition, voltage not will rise, remaining N-M H bridging parallel operation is in uncontrollable rectifier state, N-M H
Capacitor C in bridging parallel operationHVoltage continuous rise；In entirely control cycle T c, Tc takes 1~10ms；Due to DAB converter
Effect, the capacitor C in A phase, B phase and C phase cascade converterLVoltage is also by continuous rise, closed high A.C. contactor S2,
So that A phase, B phase and C phase cascade converter capacitor CHVoltage rises to rated value UH, capacitor CLVoltage rises to rated value UL。
In the step 3), the calculation formula for the H bridging parallel operation M that every phase unlocks every time are as follows:
Wherein, UHFor CH1~CHNCapacitance voltage rated value, UlineFor the peak value of High-voltage AC Network line voltage, N is A phase, B
The H bridging parallel operation quantity of phase and C phase cascade converter, wherein N is the quantity of every phase H bridging parallel operation.
Claims (2)
1. a kind of electric power electric transformer high-pressure side dc-link capacitance pre-charge method, the electric power electric transformer is by A
Phase cascade converter, B phase cascade converter and C phase cascade converter composition；A phase cascade converter, B phase cascade converter and C
Phase cascade converter passes through inductance L respectivelygA、LgB、LgC, three-phase high-voltage A.C. contactor S2, charging resistor R1、R2、R3And three-phase
High-voltage alternating contactor S1It is connected to three phase network, charging resistor R1、R2、R3It is serially connected in three-phase high-voltage A.C. contactor S1And three-phase
High-voltage alternating contactor S2Between；The output end of A phase cascade converter, B phase cascade converter and C phase cascade converter is connected in parallel on
Together, it is connect with low-voltage direct P, N-terminal；
The A phase cascade converter, B phase cascade converter are identical with the structure of C phase cascade converter, by N number of power mould
Block cascade composition, N is positive integer；N number of power module input terminal is cascaded, output end is connected in parallel,；Each power mould
Block is made of 1 H bridging parallel operation and 1 DAB converter connection；The H bridging parallel operation H of N number of power module1~HNInput terminal structure
At the input terminal of N number of power module, the DAB converter DAB of N number of power module1~DABNOutput end constitute N number of power module
Output end；The output end of N number of H bridging parallel operation connects capacitor CH1~CHNAfterwards with DAB converter DAB1~DABNInput terminal phase
Even, DAB converter DAB1~DABNOutput end connect capacitor CL1~CLNAfter be connected in parallel, connect with low-voltage direct P, N-terminal；
A phase cascade converter filter inductance LgAOne end be connected to A phase H bridging parallel operation H1Ac terminal a, B phase cascade unsteady flow
Device filter inductance LgBOne end be connected to B phase H bridging parallel operation H1Ac terminal a, C phase cascade converter filter inductance LgCOne
End is connected to C phase H bridging parallel operation H1Ac terminal a；A phase cascade converter filter inductance LgAThe other end be connected to charging electricity
Hinder R1, B phase cascade converter filter inductance LgBThe other end be connected to charging resistor R2, C phase cascade converter filter inductance LgC
The other end be connected to charging resistor R3；One end of three-phase high-voltage A.C. contactor S2 is respectively connected to charging resistor R1, charging
One end of resistance R2 and charging resistor R3, the other end of three-phase high-voltage A.C. contactor S2 are respectively connected to charging resistor R1, fill
The other end of resistance R2 and charging resistor R3；One end of three-phase high-voltage A.C. contactor S1 is respectively connected to A, B and C phase high pressure
AC network, the other end of three-phase high-voltage A.C. contactor S1 are respectively connected to charging resistor R1, charging resistor R2 and charging electricity
The other end of R3 is hindered,
It is characterized by: the electric power electric transformer pre-charge method is as follows:
1) three-phase high-voltage A.C. contactor S is disconnected2, the contactor S of closure three-phase high-voltage exchange side1, while unlocking cascade converter
DAB converter in A phase cascade converter, B phase cascade converter and C phase；
2) keep the DAB converter of A phase cascade converter, B phase cascade converter and C phase cascade converter in the unlocked state,
Keep the H bridging parallel operation H of A phase cascade converter, B phase cascade converter and C phase cascade converter1~HNIn blocking, to
The capacitor C of A phase cascade converter, B phase cascade converter and C phase cascade converterHVoltage rise to UlineWhen/2N, the first stage
Charging terminates, wherein UlineFor the peak value of High-voltage AC Network line voltage；
3) after first stage charging, the H bridging of A phase cascade converter, B phase cascade converter and C phase cascade converter is changed
In device, according to sequence from small to large, select in A phase cascade converter, B phase cascade converter and C phase cascade converter in turn
M cascaded H-bridges converter be unlocked, M be less than every phase cascade converter in H bridging parallel operation quantity N；At this point, each will mutually have M
A capacitor CHIt will be in bypass condition, voltage not will rise, remaining N-M H bridging parallel operation is in uncontrollable rectifier state, with it
The capacitor C of remaining N-M H bridging parallel operation connectionHVoltage continuous rise；In entirely control cycle T c, Tc takes 1~10ms；By
The effect of DAB converter, the capacitor C in A phase cascade converter, B phase cascade converter and C phase cascade converterLVoltage also will
Continuous rise, closed high A.C. contactor S2, so that A phase cascade converter, B phase cascade converter and C phase cascade converter
Capacitor CHVoltage rises to rated value UH, capacitor CLVoltage rises to rated value UL。
2. a kind of electric power electric transformer high-pressure side dc-link capacitance pre-charge method as described in claim 1, feature
It is: in the step 3), the calculation formula for the H bridging parallel operation M that every phase unlocks every time are as follows:
Wherein, UHFor CH1~CHNCapacitance voltage rated value, UlineFor the peak value of High-voltage AC Network line voltage, N be A phase, B phase and
The quantity of the H bridging parallel operation of C phase cascade converter, wherein N is the quantity of every phase H bridging parallel operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421501.XA CN110138240B (en) | 2019-05-21 | 2019-05-21 | Pre-charging method for high-voltage side direct-current bus capacitor of power electronic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421501.XA CN110138240B (en) | 2019-05-21 | 2019-05-21 | Pre-charging method for high-voltage side direct-current bus capacitor of power electronic transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110138240A true CN110138240A (en) | 2019-08-16 |
| CN110138240B CN110138240B (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910421501.XA Active CN110138240B (en) | 2019-05-21 | 2019-05-21 | Pre-charging method for high-voltage side direct-current bus capacitor of power electronic transformer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832801A (en) * | 2012-09-19 | 2012-12-19 | 山东大学 | System and method for grouping and pre-charging modular multilevel converter capacitor |
| CN107124115A (en) * | 2017-06-16 | 2017-09-01 | 特变电工新疆新能源股份有限公司 | A kind of method that solid-state transformer starts |
| CN109450279A (en) * | 2018-12-04 | 2019-03-08 | 中国科学院电工研究所 | Three-level type AC and DC power electronic transformer dc-link capacitance pre-charge method |
-
2019
- 2019-05-21 CN CN201910421501.XA patent/CN110138240B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832801A (en) * | 2012-09-19 | 2012-12-19 | 山东大学 | System and method for grouping and pre-charging modular multilevel converter capacitor |
| CN107124115A (en) * | 2017-06-16 | 2017-09-01 | 特变电工新疆新能源股份有限公司 | A kind of method that solid-state transformer starts |
| CN109450279A (en) * | 2018-12-04 | 2019-03-08 | 中国科学院电工研究所 | Three-level type AC and DC power electronic transformer dc-link capacitance pre-charge method |
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| CN110138240B (en) | 2021-01-01 |
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