CN110336470A - Electric power electric transformer system, transformer and its fault traversing control method - Google Patents
Electric power electric transformer system, transformer and its fault traversing control method Download PDFInfo
- Publication number
- CN110336470A CN110336470A CN201910616077.4A CN201910616077A CN110336470A CN 110336470 A CN110336470 A CN 110336470A CN 201910616077 A CN201910616077 A CN 201910616077A CN 110336470 A CN110336470 A CN 110336470A
- Authority
- CN
- China
- Prior art keywords
- low
- pressure
- bridge module
- arm branch
- pressure side
- 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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M1/36—Means for starting or stopping 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to electric power electric transformer system, transformer and its fault traversing control methods, belong to two-way isolated DC voltage transformation technical field, electric power electric transformer includes: at least one mould group, each mould group includes high voltage half-bridge module and bidirectional, dc converter unit, and high voltage half-bridge module includes high pressure upper arm branch and high pressure lower arm branch；It further include from blocking module, it is in parallel with the low-pressure side of each mould group, it should include low pressure half-bridge module from module is blocked, low pressure half-bridge module includes low pressure upper arm branch and low pressure lower arm branch, for low pressure lower arm branch for connecting low-pressure side DC grid, total branch that low pressure upper arm branch and low pressure lower arm branch connect into is in parallel with the low-pressure side of each mould group.The half-bridge module being arranged by the high-pressure side of mould group and the cooperation control from half-bridge module in blocking module, make electric power electric transformer of the invention have fault ride-through capacity, improve the reliability and stability of operation of power networks.
Description
Technical field
The invention belongs to two-way isolated DC voltage transformation technical fields, and in particular to electric power electric transformer system becomes
Depressor and its fault traversing control method.
Background technique
Currently, being applied to the electric power electric transformer of direct current distribution, new-energy grid-connected and energy internet with many excellent
Point, such as: weight and volume-diminished；Voltage, electric current controllable precise, power quality are improved；Modularized design is expanded convenient for system
Hold, dismantle and safeguards；With advantages such as low pollution, high efficiency and intelligences.But it breaks down in electric power electric transformer
When, whole system where electric power electric transformer will disorderly closedown, the reliability and stability of direct current distribution power supply are made
At seriously affecting.
Summary of the invention
The object of the present invention is to provide a kind of electric power electric transformers, are that electric power electric transformer has failure for solving
Ride-through capability provides the problem of executing hardware；
The fault traversing control method for also proposing a kind of electric power electric transformer (refers to for solving high-pressure side DC grid
Electric power electric transformer high-pressure side connection DC grid) occur short trouble when, the prior art electric power electric transformer hair
The problem of raw failure, that is, system-down, causing the reliability and stability of operation of power networks reduces；
And the fault traversing control method of another electric power electric transformer, (refer to for solving low-pressure side DC grid
Electric power electric transformer low-pressure side connection DC grid) occur short trouble when, the prior art electric power electric transformer hair
The problem of raw failure, that is, system-down, causing the reliability and stability of operation of power networks reduces；
It also proposed a kind of electric power electric transformer system, break down for solving prior art electric power electric transformer
The problem of i.e. system-down causes electric network reliability and stability to reduce.
Based on above-mentioned purpose, a kind of technical solution of electric power electric transformer of the invention is as follows:
At least one mould group, each mould group include sequentially connected high voltage half-bridge module and bidirectional, dc converter unit,
In, the high-pressure side series connection of half-bridge module is equipped with the first inductance, and high voltage half-bridge module includes high pressure upper arm branch and high pressure lower arm branch
Road, high pressure upper arm branch are connected with high pressure lower arm branch, the high-pressure side of the high pressure lower arm branch as mould group；
Bidirectional, dc converter unit include sequentially connected primary side semiconductor converting unit, primary side resonant network, transformer,
The secondary semiconductor converting unit in resonant network and pair, the pair side semiconductor converting unit are in the low-pressure side of mould group；
It further include from blocking module, in parallel with the low-pressure side of each mould group, should block certainly module include low pressure half-bridge module, institute
Stating low pressure half-bridge module includes low pressure upper arm branch and low pressure lower arm branch, and low pressure lower arm branch is for connecting low-pressure side direct current
Total branch that net, low pressure upper arm branch and low pressure lower arm branch connect into is in parallel with the low-pressure side of each mould group.
Above-mentioned technical proposal has the beneficial effect that
The present invention devises a kind of hardware device of electric power electric transformer, and high voltage half-bridge mould is arranged in the high-pressure side of mould group
Bidirectional, dc converter unit is arranged in block, low-pressure side, and the bidirectional, dc converter unit of each mould group, which passes through from blocking module, connects low pressure
Side DC grid, the high voltage half-bridge module being arranged by the high-pressure side of mould group and the cooperation from blocking module mesolow half-bridge module
Control, makes electric power electric transformer of the invention have fault ride-through capacity, has fault traversing energy for electric power electric transformer
Power provides effective hardware support.
In order to adapt to specific voltage class, the electric power electric transformer being made of more than two mould groups, each mould group
High-pressure side series connection, low-pressure side are in parallel.
When in order to there is mould group to break down in electric power electric transformer, failure mould group, further, each mould are cut off in time
The high-pressure side of the high voltage half-bridge module of group is parallel with by-pass switch, by controlling the on-off of by-pass switch, realizes respective mode group
Excision and investment.
In order in high-pressure side power grid removal of load absorb high-pressure side inductance release energy, the mould group it is on high-tension side just
High-pressure side absorption circuit is connected between cathode；It is equipped with the second inductance between low pressure lower arm branch and low-pressure side DC grid, uses
In playing filter action, in order to absorb the energy of low-pressure side inductance release in low-pressure side power grid removal of load, the mould group it is low
It presses and is connected with low-pressure side absorption circuit between the positive and negative anodes of side.
Specifically, low-pressure side absorption circuit includes the first absorption circuit and the second absorption circuit in parallel, first absorbs back
Road is provided with first resistor, first capacitor；It is provided with second resistance, the second capacitor and diode on second absorption circuit, uses
In when short trouble occurs for low-pressure side power grid, which can prevent the capacitor road on the second absorption circuit from discharging and damaging
It is bad, while playing the role of limiting short-circuit current.
Based on above-mentioned purpose, a kind of technical solution one of the fault traversing control method of electric power electric transformer:
High voltage half-bridge module is set in the high-pressure side of electric power electric transformer, is arranged in the low-pressure side of electric power electric transformer
Low pressure half-bridge module, high voltage half-bridge module include high pressure upper arm branch and high pressure lower arm branch, under high pressure upper arm branch and high pressure
The connection of arm branch, the high pressure lower arm branch is for connecting high-pressure side DC grid；Low pressure half-bridge module includes low pressure upper arm branch
With low pressure lower arm branch, low pressure upper arm branch is connected with low pressure lower arm branch, and the low pressure lower arm branch is straight for connecting low-pressure side
Galvanic electricity net；
When short trouble occurs for high-pressure side DC grid, the switching tube of high voltage half-bridge module and low pressure half-bridge module is controlled
Shutdown；After the short trouble in the DC grid of high-pressure side is removed, the respective switch pipe of control high voltage half-bridge module is operated normally,
Control the conducting of low pressure upper arm branch, the shutdown of low pressure lower arm branch in low pressure half-bridge module.
The technical solution one of fault traversing control method has the beneficial effect that
For the hardware device of electric power electric transformer proposed by the present invention, short circuit event occurs in the DC grid of high-pressure side
When barrier, the switching tube by only controlling high voltage half-bridge module and low pressure half-bridge module is turned off, and can realize fault traversing, without
The switching tube in the bidirectional, dc converter unit to work must be turned off, electric power electric transformer of the invention is made to encounter short circuit
Not shutting down when failure will not damage, and have the function of fault traversing, improve the reliability and stability of operation of power networks.
Based on above-mentioned purpose, the technical side for the fault traversing control method that a kind of electric power electric transformer of the invention is realized
Case two:
High voltage half-bridge module is set in the high-pressure side of electric power electric transformer, is arranged in the low-pressure side of electric power electric transformer
Low pressure half-bridge module, high voltage half-bridge module include high pressure upper arm branch and high pressure lower arm branch, under high pressure upper arm branch and high pressure
The connection of arm branch, the high pressure lower arm branch is for connecting high-pressure side DC grid；Low pressure half-bridge module includes low pressure upper arm branch
With low pressure lower arm branch, low pressure upper arm branch is connected with low pressure lower arm branch, and the low pressure lower arm branch is straight for connecting low-pressure side
Galvanic electricity net；
When short trouble occurs for low-pressure side DC grid, the upper switch pipe conducting of control high voltage half-bridge module, lower switch
Pipe shutdown, the low-pressure side of electric power electric transformer is made to the switching tube of low pressure half-bridge module using outer voltage current inner loop control
DC voltage instruction value of the DC voltage stability in setting；
When in low-pressure side DC grid short trouble remove after, control low pressure half-bridge module upper switch pipe conducting, under
The respective switch pipe of switching tube shutdown, control high voltage half-bridge module operates normally.
The technical solution two of fault traversing control method has the beneficial effect that
For the hardware device of electric power electric transformer proposed by the present invention, short circuit event occurs in low-pressure side DC grid
When barrier, by exchange high voltage half-bridge module switching tube and low pressure half-bridge module switching tube control strategy (when normal operation,
The switching tube of high voltage half-bridge module use outer voltage current inner loop control, low pressure half-bridge module upper switch pipe conducting, under open
Close pipe shutdown；When short trouble, the conducting of upper switch pipe, the shutdown of lower switch pipe of high voltage half-bridge module, low pressure half-bridge module are opened
Close pipe and use outer voltage current inner loop control), fault traversing can be realized, without turning off the bidirectional, dc to work
Switching tube in converter unit, not shutting down electric power electric transformer of the invention when encountering short trouble will not damage,
And has the function of fault traversing, improve the reliability and stability of operation of power networks.
Based on above-mentioned purpose, a kind of technical solution of electric power electric transformer system is as follows:
Controller including switching tube in above-mentioned electric power electric transformer, and control connection electric power electric transformer, should
Controller is used for:
When short trouble occurs for DC grid in high-pressure side, the switching tube of high voltage half-bridge module and low pressure half-bridge module is controlled
Shutdown；After the short trouble in the DC grid of high-pressure side is removed, the respective switch pipe of control high voltage half-bridge module is operated normally,
Control the conducting of low pressure upper arm branch, the shutdown of low pressure lower arm branch in low pressure half-bridge module.
Based on above-mentioned purpose, a kind of technical solution of electric power electric transformer system is as follows:
Controller including switching tube in above-mentioned electric power electric transformer, and control connection electric power electric transformer, should
Controller is used for:
When short trouble occurs for low-pressure side DC grid, the upper switch pipe conducting of control high voltage half-bridge module, lower switch
Pipe shutdown, the low-pressure side of electric power electric transformer is made to the switching tube of low pressure half-bridge module using outer voltage current inner loop control
DC voltage instruction value of the DC voltage stability in setting；After the short trouble in low-pressure side DC grid is removed, control low
The conducting of upper switch pipe, the shutdown of lower switch pipe of half-bridge module are pressed, the respective switch pipe of control high voltage half-bridge module operates normally.
Above-mentioned technical proposal has the beneficial effect that:
The hardware device of a kind of electric power electric transformer designed through the invention, in the high-pressure side of mould group setting high pressure half
Bidirectional, dc converter unit is arranged in bridge module, low-pressure side, and the bidirectional, dc converter unit of each mould group passes through from blocking module connection
Low-pressure side power grid makes this hair by the high voltage half-bridge module of mould group and from blocking the cooperation of module mesolow half-bridge module to control
Bright electric power electric transformer has fault ride-through capacity, i.e., when short trouble occurs for high-pressure side DC grid, by only controlling
The switching tube of high voltage half-bridge module processed and low pressure half-bridge module shutdown, to realize fault traversing；Occur in low-pressure side DC grid
When short trouble, the control strategy of the switching tube by exchanging high voltage half-bridge module and low pressure half-bridge module, to realize that failure is worn
More, to improve the reliability and stability of operation of power networks.
Detailed description of the invention
Fig. 1 is a kind of electric power electric transformer schematic diagram of transformer embodiments of the present invention；
Fig. 2 is the mould group topology schematic diagram of voltage transformer system embodiment of the present invention；
Fig. 3 is the side 750V voltage source control block diagram in voltage transformer system embodiment of the present invention；
Fig. 4 is the bypass of failure mould group and the high voltage side current wave for switching phase shifting angle in voltage transformer system embodiment of the present invention
Shape figure (bypasses failure mould group) when 0.15s；
Fig. 5 is in voltage transformer system embodiment of the present invention, and failure mould group bypasses and do not switch the high voltage side current of phase shifting angle
Waveform diagram (bypasses failure mould group) when 0.15s；
Fig. 6 (a) is the pwm pulse waveform diagram opened the light in high voltage half-bridge module in voltage transformer system embodiment of the present invention；
Fig. 6 (b) is the pwm pulse waveform diagram from switching tube in blocking module in voltage transformer system embodiment of the present invention；
In figure, upper column is the pwm pulse waveform from the upper switch pipe for blocking module mesolow half-bridge module；Lower column is from blocking module
The pwm pulse waveform of the lower switch pipe of low pressure half-bridge module；
During Fig. 7 (a) is the direct-current short circuit fault traversing in voltage transformer system embodiment of the present invention, 750V lateral load electric current
From blocking and fast quick-recovery waveform diagram；
During Fig. 7 (b) is the direct-current short circuit fault traversing in voltage transformer system embodiment of the present invention, the side 750V Voltage Drop
With fast quick-recovery waveform diagram；
Fig. 8 is controlling tactic switch frame during the direct-current short circuit failure of low-pressure side in voltage transformer system embodiment of the present invention
Figure；
Fig. 9 is in voltage transformer system embodiment of the present invention, and the side 750V exports during the direct-current short circuit fault traversing of low-pressure side
Current waveform figure；
Figure 10 is in voltage transformer system embodiment of the present invention, and the side 750V exports during the direct-current short circuit fault traversing of low-pressure side
Voltage oscillogram；
Figure 11 is push-pull circuit in the prior art and primary tapped transformer schematic diagram.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing.
Voltage transformer system embodiment:
This implementation proposes a kind of electric power electric transformer system, including electric power electric transformer, and control connection electric power
The controller of switching tube in electronic transformer, a kind of electric power electric transformer as shown in Figure 1, high-pressure side and low-pressure side are true
Specific voltage class is determined, respectively ± 10kV (or 20kV), 750V, system total power 1.5MW.In order to adapt to voltage etc.
The demand of grade, which includes 24 mould group (1# being connected between the high-pressure side of DC grid and low-pressure side
In addition mould group ..., 24# mould group also set two redundancy stand-by set of dies groups, are not shown in the figure), the high-pressure side series connection of each mould group, low pressure
Side is in parallel.
Each mould group includes high voltage half-bridge module and bidirectional, dc converter unit, by taking 1# mould group as an example, as shown in Fig. 2,
High voltage half-bridge module includes high pressure upper arm branch and high pressure lower arm branch, and high pressure upper arm branch is connected with high pressure lower arm branch, should
High-pressure side of the high pressure lower arm branch as mould group；It is provided with upper switch pipe Q9 in high pressure upper arm branch, is set in high pressure lower arm branch
It is equipped with lower switch pipe Q10, midpoint is equipped between high pressure upper arm branch and high pressure lower arm branch, which passes through high-pressure side filtered electrical
Sense L1 is for connecting high-pressure side DC grid.
Bidirectional, dc converter unit include sequentially connected primary side semiconductor converting unit (including upper switch pipe Q1, Q3, under
Switching tube Q2, Q4), primary side resonant network (including Lr1, Cr1, Lm), high frequency transformer, secondary side resonant network (including Lr2,
) and secondary side semiconductor converting unit (including upper switch pipe Q5, Q7, lower switch pipe Q6, Q8) Cr2.Wherein, primary side resonant network and
The symmetrical configuration of secondary side resonant network, LmFor the magnetizing inductance of high frequency transformer, high frequency transformer works in resonance frequency
10kHz, the no-load voltage ratio of high frequency transformer are 4:3, and primary side semiconductor converting unit connects the high pressure upper arm branch of high voltage half-bridge module
With high pressure lower arm branch, secondary side semiconductor converting unit is used for by connecting low-pressure side DC grid from blocking module.This is two-way
DC converting unit realizes the electrical isolation and voltage conversion function of high and low pressure side by high frequency transformer.Bypass in mould group
For realizing failure mould group is cut off when mould group breaks down, fuse FV is used for when short trouble occurs for module internal switch K
Carry out fuse protection.
The blocking module certainly of auxiliary connection side semiconductor converting unit was as shown in Figure 1, should be mutual including three from blocking module
Low pressure half-bridge module in parallel, wherein the low pressure upper arm branch of respective low pressure half-bridge module is arranged in upper switch pipe Q11, Q13, Q15
Road, lower switch pipe Q12, Q14, Q16 are arranged in the low pressure lower arm branch of respective low pressure half-bridge module, and each low pressure half-bridge module
Low pressure lower arm branch for connecting low-pressure side DC grid, total branch that low pressure upper arm branch and low pressure lower arm branch connect into
The low-pressure side of each mould group is in parallel.
In Fig. 1, KM1 is high-pressure side main contactor, and KR1 is high-pressure side soft start contactor；L1 is high-pressure side filter inductance,
Play metering function, resistance R1, capacitor C1 high-pressure side absorption circuit in series, be arranged in mould group on high-tension side positive and negative anodes it
Between, for absorbing the energy of high-pressure side inductance release in high-pressure side DC grid removal of load；L2 is low-pressure side filter inductance, electricity
Hinder R2, capacitor C2 low-pressure side absorption circuit in series (for the first absorption circuit), be arranged in mould group low-pressure side positive and negative anodes it
Between, for absorbing the energy of low-pressure side inductance release in low-pressure side DC grid removal of load；C4 is low-pressure side bus capacitor；
KM2 is low-pressure side main contactor, and KR2 is low-pressure side soft start contactor.
In Fig. 1, RCD absorption circuit (for the second absorption circuit) is made of resistance R3, capacitor C3, diode D, for low
Absorption excess energy prevents voltge surge when pressing side DC grid is prominent to get rid of nominal load；Short circuit event occurs in low-pressure side DC grid
Diode D prevents capacitor C3 short circuit dischange and damages when barrier, and the situation for preventing short circuit current very big and uncontrollable occurs.And
It, will not Damage by Short Circuit by resistance R2 current limliting when short-circuit and since the capacitance of capacitor C2 is smaller.
There are two types of Starting mode and three kinds of operating modes for electric power electric transformer shown in FIG. 1, wherein Starting mode difference
Are as follows: from high pressure to low voltage starting, from low pressure to high voltage startup；Three kinds of operating modes are respectively as follows: the side ± 10kV current source Working mould
Formula, the control of progress ± 10kV side current source；The side ± 10kV voltage source operating mode, the control of progress ± 10kV side voltage source；750V
Side voltage source operating mode carries out the control of the side 750V voltage source.
By taking electric power electric transformer works in the side 750V voltage source operating mode as an example, when work is in the side 750V voltage source work
When operation mode, high-pressure side gets access to grid, and low pressure flanks load, as shown in figure 3, the specific control method step of the side 750V voltage source is such as
Under:
1. the side 750V DC voltage Udc_fdb_750V is detected, with the side 750V DC voltage instruction value Udc_ref_750V
(issuing from the background) is compared, and the error signal compared is calculated through pi regulator, in the electric current of the side output ± 10kV
The current instruction value Idc_ref_10kV of ring.
2. detection ± 10kV side DC current Idc_fdb_10kV, with current instruction value Idc_ref_10kV (value by
The output of 750V outer voltage) it is compared, the error signal compared is calculated through pi regulator, exports modulating wave M_
Buck_Boost, and being compared respectively with 24 phase shift carrier waves, 24 carrier phases successively 360 °/24=15 ° of mutual deviation；Compare
Mode are as follows: if modulating wave is greater than or equal to carrier wave, export high level；If modulating wave is less than carrier wave, low level is exported.By above-mentioned ratio
The upper switch pipe control wave of 24 high voltage half-bridge modules of the side ± 10kV obtained compared with mode, negates it to obtain high pressure
The lower switch pipe control wave of half-bridge module.
Bidirectional, dc converter unit of the invention, which uses, determines frequency synchronisation control means as follows:
The PWM driving pulse of primary side semiconductor converting unit and secondary side semiconductor converting unit is that (frequency is LLC's to fixed frequency
Series resonance frequency 10kHz), 50% fixed duty cycle, Q1, Q4, Q5, Q8 power device driving pulse in control figure 2 are the same as frequency
Same-phase, Q2, Q3, Q6, Q7 power device driving pulse are with frequency same-phase, and the upper and lower power device of same bridge arm (switchs
Pipe) driving pulse it is complementary.
When some mould group breaks down, the failure of progress is as follows from cutting method:
1) after detecting the mould group failure, control system (control terminal that control system control connects each switching tube) is immediately
Block the driving pwm pulse of all switching tubes (for example, IGBT) (Q1~Q10) of the mould group；
2) the by-pass switch K close commands for then issuing the mould group, cut off failure mould group；
3) control system need according at present operation mould group sum and failure mould group position recalculate carrier wave 1 in Fig. 3~
The phase shifting angle of carrier wave 24, and phase shifting angle switching is carried out, reduce high voltage side current ripple (as shown in Figure 4), otherwise will lead to high pressure
Side current ripples increase, and are illustrated in fig. 5 shown below.
The phase shifting angle calculating principle of carrier wave is as follows:
When a) breaking down without mould group, 24 carrier phases successively 360 °/24=15 ° of mutual deviation, it may be assumed that 1# mould group phase-shifting carrier wave
Angle is 0 °, and 2# mould group phase-shifting carrier wave angle is 15 ° ... ..., and 24# mould group phase-shifting carrier wave angle is 345 °；
When b) having mould group to break down, the phase-shifting carrier wave angle of the failure mould group is assigned to next adjacent fault-free mould
All driving pulses of group, the failure mould group are blocked, and bypass backed off after random operation by by-pass switch；
C) for principle a) and principle b), must meet: the mould group of real time execution is carried by number order from small to large
Wave phase shifting angle successively differs 360 °/N, and N is the mould group sum (the present embodiment N=24) operated normally.
According to the phase shifting angle calculating principle of the above carrier wave it is found that when the position of mould group failure number and failure mould group becomes at random
When change, the calculating of phase-shifting carrier wave angle is comparatively laborious, needs to be calculated with unified method, specific as follows:
A. it defines mould group operation array and assigns initial value:
A_Run [24]={ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 }
(note: 24 in A_Run [24] indicate the number of element in array A_Run, this is format as defined in C language.Work as A_
Run [24] is used in combination with subsequent assignment { 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 }
When indicate to be meant that define one array with 24 elements, an element being not offered as in A_Run [i])
The meaning that array element A_Run [i] is indicated is as follows:
B. it defines mould group phase shift angle array and assigns initial value:
A_Theta [24]={ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
C. each mould group fault message of real-time detection in operational process, according to have fault-free to mould group operation array in element
Assignment:
D. array element numerical value is run according to mould group and calculates operation mould group sum Run_Num in real time:
E. according to mould group run sum Run_Num and mould group operation array in element value A_Run [i], calculating 2# mould group~
After phase-shifting carrier wave angle (note: when the two mould groups break down) excision of 24# mould group, remaining 22 mould groups do not need to compile again
Number, number originally is constant, and the 2#~24# mould group phase shifting angle calculated at this time still corresponds to the phase shifting angle of former number mould group), 1# mould
The phase-shifting carrier wave angle of group is always 0 °, and initial value has been assigned to 0 °, is calculated as follows:
As the failure number > 2 of mould group, the controller of system issues halt command and blocks all IGBT module PWM arteries and veins
Punching, system enter disorderly closedown state.
Below still by taking electric power electric transformer works in the side 750V voltage source operating mode as an example, it is set forth in generation short circuit event
The fault traversing control method that electric power electric transformer is realized when barrier:
1) when short trouble occurs for the side ± 10kV, the side 750V connects normal load, the specific step of fault traversing control method
It is rapid as follows:
1. detect that short trouble occurs for high-pressure side (i.e. the side ± 10kV), controller is opened to all high voltage half-bridge modules
It closes pipe (Q9, Q10) and refers to from blocking the switching tube (Q11, Q12 ..., Q16) of module mesolow half-bridge module to issue locking pulse
It enables, carries out pulse blocking, the PWM driving pulse of switching tube is not blocked in bidirectional, dc converter unit；
2. controller gives all high voltage half-bridge modules and low pressure half-bridge module after detecting that on high-tension side short trouble is removed
Switching tube issue unlock pulse command, carry out pulse unlock, electric power electric transformer is quick according to the operating status before failure
It puts into operation, i.e., the double -loop control algorithm (outside abbreviation voltage of the side 750V outer voltage shown in Fig. 3, the side ± 10kV current inner loop
Circular current inner loop control).
According to above-mentioned steps, the block of switching tube and unlock pulse such as Fig. 6 (a) are shown in high voltage half-bridge module, from blocking
The block of switching tube and unlock pulse such as Fig. 6 (b) are shown in module.During short trouble passes through, 750V lateral load electric current is certainly
It blocks and fast quick-recovery waveform such as Fig. 7 (a) is shown, the side 750V Voltage Drop and fast quick-recovery waveform such as Fig. 7 (b) are shown.
2) when direct-current short circuit failure occurs for the side 750V, specific step is as follows for fault traversing control method:
1. detect that short trouble occurs for the side 750V DC grid, 1.2 times of volume is provided to meet system to load-side
Determine short circuit current, the modulating wave of switching tube is switched to solid from the output of high voltage side current ring in all high voltage half-bridge modules in the side ± 10kV
Definite value 1.0, guarantee high voltage half-bridge module during failure upper switch pipe (Q9) is constantly on, lower switch pipe (Q10) turns off always；
2. during short trouble, from block module it is constantly on from the upper switch pipe (Q11, Q13, Q15) before failure, under
Switching tube (Q12, Q14, Q16) turns off always, is switched to outer voltage (side 750V Voltage loop), the current inner loop (side 750V electric current
Ring) double -loop control algorithm, controlling tactic switch block diagram is as shown in Figure 8；
3. after detecting that short trouble in low-pressure side DC grid is removed, controller is by switching tube in high voltage half-bridge module
Modulating wave, and from blocking the modulating wave of switching tube in module to be switched to normal operating condition, electric power electric transformer according to therefore
Operating status before barrier quickly puts into operation, as shown in Figure 8.
According to above-mentioned steps, electric current, voltage simulation waveform when short trouble occurs for low-pressure side DC grid are such as schemed respectively
9, shown in Figure 10, in Fig. 9 and Figure 10, short trouble occurs in 0.1s, in 0.3s fault clearance, as shown in Figure 9, to load-side
1.2 times of specified short circuit currents are provided and maintain a period of time (0.2s), the operation after fault clearance before the fast quick-recovery failure of energy
State realizes fault traversing.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.For example, the electric power electric transformer in the present embodiment comprising 24
Mould group and 2 standby redundancy mould groups, as other embodiments, when on high-tension side voltage class is lower, for example, 1kV, electricity
One mould group and a standby redundancy mould group can be only set in power electronic transformer, but operated normally in electric power electric transformer
When, an only mould group investment.
For another example, fault traversing control method of the invention is applicable not only to the side 750V voltage source operating mode, applies also for
Operating mode in the prior art, such as side ± 10kV current source operating mode and the side ± 10kV voltage source operating mode.
In three kinds of operating modes, i.e. the side 750V voltage source operating mode, the side ± 10kV current source operating mode and ± 10kV
Side voltage source operating mode is included in the prior art regardless of which kind of mode breaks down.In three kinds of operating modes: if ±
10kV breaks down side, with regard to by it is above-mentioned 1) in the side ± 10kV occur short trouble when control strategy carry out fault traversing；If
750V breaks down side, with regard to by it is above-mentioned 2) in the side 750V occur direct-current short circuit failure when control strategy carry out fault traversing.
For another example, three low pressure half-bridge modules are provided with from blocking module in Fig. 1, as other embodiments, Ke Yigen
According to the quantity of the current range setting low pressure half-bridge module of low-pressure side DC grid, if conditions permit, from blocking the module can also be with
One low pressure half-bridge module is only set.
For another example, the controller for controlling switching tube in electric power electric transformer can only configure the generation of high-pressure side DC grid
The fault traversing control method of short trouble, or only the fault traversing control of short trouble occurs for configuration low-pressure side DC grid
Method.
For another example, former/secondary side semiconductor converting unit can also be used in addition to that can use full-bridge modules as shown in Figure 2
Push-pull circuit in the prior art and primary tapped transformer realize, as shown in figure 11.Former/secondary side resonant network is in addition to can be with
Using symmetrical structure as shown in Figure 2, can also use in unsymmetric structure (for the prior art, no longer illustrate).
For another example, the processor in the present embodiment is either computer, is also possible to microprocessor, such as ARM, can be with
It is programmable chip, such as FPGA, DSP.
Therefore, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all wrap
It is contained within scope of the presently claimed invention.
Control method embodiment:
High voltage half-bridge module is set in the high-pressure side of electric power electric transformer, is arranged in the low-pressure side of electric power electric transformer
Low pressure half-bridge module, high voltage half-bridge module include high pressure upper arm branch and high pressure lower arm branch, under high pressure upper arm branch and high pressure
The connection of arm branch, the high pressure lower arm branch is for connecting high-pressure side DC grid；Low pressure half-bridge module includes low pressure upper arm branch
With low pressure lower arm branch, low pressure upper arm branch is connected with low pressure lower arm branch, and the low pressure lower arm branch is straight for connecting low-pressure side
Galvanic electricity net.
Based on the electric power electric transformer of above-mentioned setting high voltage half-bridge module and low pressure half-bridge module, the present embodiment proposes one
Kind fault traversing control method, steps are as follows:
When short trouble occurs for high-pressure side DC grid, the switching tube of high voltage half-bridge module and low pressure half-bridge module is controlled
Shutdown；After the short trouble in the DC grid of high-pressure side is removed, the respective switch pipe of control high voltage half-bridge module is operated normally,
The conducting of low pressure upper arm branch, the shutdown of low pressure lower arm branch in low pressure half-bridge module are controlled, can realize high-pressure side direct current
The fault traversing of short trouble occurs for net.
When short trouble occurs for low-pressure side DC grid, the upper switch pipe conducting of control high voltage half-bridge module, lower switch
Pipe shutdown, the low-pressure side of electric power electric transformer is made to the switching tube of low pressure half-bridge module using outer voltage current inner loop control
DC voltage instruction value of the DC voltage stability in setting.After the short trouble in low-pressure side DC grid is removed, control low
The conducting of upper switch pipe, the shutdown of lower switch pipe of half-bridge module are pressed, the respective switch pipe of control high voltage half-bridge module operates normally, i.e.,
It can be realized the fault traversing that short trouble occurs for low-pressure side DC grid.
The fault traversing control method of the present embodiment, is not only applicable to electric power electric transformer shown in FIG. 1, as long as
Low pressure half-bridge module is set in the high-pressure side of existing electric power electric transformer setting high voltage half-bridge module, low-pressure side, is applicable in this
The fault traversing control method of embodiment.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of electric power electric transformer characterized by comprising
At least one mould group, each mould group include sequentially connected high voltage half-bridge module and bidirectional, dc converter unit, wherein half
The high-pressure side series connection of bridge module is equipped with the first inductance, and high voltage half-bridge module includes high pressure upper arm branch and high pressure lower arm branch, height
Pressure upper arm branch is connected with high pressure lower arm branch, the high-pressure side of the high pressure lower arm branch as mould group；
Bidirectional, dc converter unit includes sequentially connected primary side semiconductor converting unit, primary side resonant network, transformer, secondary side
Resonant network and secondary side semiconductor converting unit, the pair side semiconductor converting unit are in the low-pressure side of mould group；
It further include from blocking module, in parallel with the low-pressure side of each mould group, should block certainly module include low pressure half-bridge module, described low
Pressure half-bridge module includes low pressure upper arm branch and low pressure lower arm branch, and low pressure lower arm branch is used to connect low-pressure side DC grid,
Total branch that low pressure upper arm branch and low pressure lower arm branch connect into is in parallel with the low-pressure side of each mould group.
2. electric power electric transformer according to claim 1, which is characterized in that the electric power electricity being made of more than two mould groups
Sub- transformer, the high-pressure side series connection of each mould group, low-pressure side are in parallel.
3. electric power electric transformer according to claim 1, which is characterized in that the high pressure of the high voltage half-bridge module of each mould group
Side is parallel with by-pass switch.
4. electric power electric transformer according to claim 1, which is characterized in that the on high-tension side positive and negative anodes of the mould group it
Between be connected with high-pressure side absorption circuit；The second inductance, the mould group are equipped between low pressure lower arm branch and low-pressure side DC grid
Low-pressure side positive and negative anodes between be connected with low-pressure side absorption circuit.
5. electric power electric transformer according to claim 4, which is characterized in that low-pressure side absorption circuit includes in parallel the
One absorption circuit and the second absorption circuit are provided with first resistor, first capacitor on the first absorption circuit；On second absorption circuit
It is provided with second resistance, the second capacitor and diode.
6. a kind of fault traversing control method of electric power electric transformer, which comprises the following steps:
High voltage half-bridge module is set in the high-pressure side of electric power electric transformer, low pressure is set in the low-pressure side of electric power electric transformer
Half-bridge module, high voltage half-bridge module include high pressure upper arm branch and high pressure lower arm branch, high pressure upper arm branch and high pressure lower arm branch
Road connection, the high pressure lower arm branch is for connecting high-pressure side DC grid；Low pressure half-bridge module includes low pressure upper arm branch and low
Arm branch is depressed, low pressure upper arm branch is connected with low pressure lower arm branch, and the low pressure lower arm branch is for connecting low-pressure side direct current
Net；
When short trouble occurs for high-pressure side DC grid, the switching tube for controlling high voltage half-bridge module and low pressure half-bridge module is closed
It is disconnected；After the short trouble in the DC grid of high-pressure side is removed, the respective switch pipe of control high voltage half-bridge module is operated normally, control
The conducting of low pressure upper arm branch, the shutdown of low pressure lower arm branch in low pressure half-bridge module processed.
7. a kind of fault traversing control method of electric power electric transformer, which comprises the following steps:
High voltage half-bridge module is set in the high-pressure side of electric power electric transformer, low pressure is set in the low-pressure side of electric power electric transformer
Half-bridge module, high voltage half-bridge module include high pressure upper arm branch and high pressure lower arm branch, high pressure upper arm branch and high pressure lower arm branch
Road connection, the high pressure lower arm branch is for connecting high-pressure side DC grid；Low pressure half-bridge module includes low pressure upper arm branch and low
Arm branch is depressed, low pressure upper arm branch is connected with low pressure lower arm branch, and the low pressure lower arm branch is for connecting low-pressure side direct current
Net；
When short trouble occurs for low-pressure side DC grid, the upper switch pipe conducting of control high voltage half-bridge module, lower switch pipe are closed
It is disconnected, make the low-pressure side direct current of electric power electric transformer using outer voltage current inner loop control to the switching tube of low pressure half-bridge module
DC voltage instruction value of the voltage stabilization in setting；
After the short trouble in low-pressure side DC grid is removed, the upper switch pipe conducting of control low pressure half-bridge module, lower switch
The respective switch pipe of pipe shutdown, control high voltage half-bridge module operates normally.
8. a kind of electric power electric transformer system, which is characterized in that including power electronics as described in any one in claim 1-5
The controller of switching tube, the controller are used in transformer, and control connection electric power electric transformer:
When in high-pressure side, short trouble occurs for DC grid, the switching tube for controlling high voltage half-bridge module and low pressure half-bridge module is closed
It is disconnected；After the short trouble in the DC grid of high-pressure side is removed, the respective switch pipe of control high voltage half-bridge module is operated normally, control
The conducting of low pressure upper arm branch, the shutdown of low pressure lower arm branch in low pressure half-bridge module processed.
9. a kind of electric power electric transformer system, which is characterized in that including power electronics as described in any one in claim 1-5
The controller of switching tube, the controller are used in transformer, and control connection electric power electric transformer:
When short trouble occurs for low-pressure side DC grid, the upper switch pipe conducting of control high voltage half-bridge module, lower switch pipe are closed
It is disconnected, make the low-pressure side direct current of electric power electric transformer using outer voltage current inner loop control to the switching tube of low pressure half-bridge module
DC voltage instruction value of the voltage stabilization in setting；After the short trouble in low-pressure side DC grid is removed, control low pressure half
The conducting of upper switch pipe, the shutdown of lower switch pipe of bridge module, the respective switch pipe of control high voltage half-bridge module operate normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616077.4A CN110336470B (en) | 2019-07-09 | 2019-07-09 | Power electronic transformer system, transformer and fault ride-through control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616077.4A CN110336470B (en) | 2019-07-09 | 2019-07-09 | Power electronic transformer system, transformer and fault ride-through control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110336470A true CN110336470A (en) | 2019-10-15 |
| CN110336470B CN110336470B (en) | 2021-09-03 |
Family
ID=68144810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910616077.4A Active CN110336470B (en) | 2019-07-09 | 2019-07-09 | Power electronic transformer system, transformer and fault ride-through control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110336470B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509985A (en) * | 2020-04-27 | 2020-08-07 | 许继电气股份有限公司 | Self-blocking true bipolar power electronic transformer system and control method |
| CN114336953A (en) * | 2020-09-30 | 2022-04-12 | 西安西电高压开关有限责任公司 | Control method of energy router, central controller and energy router |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140375131A1 (en) * | 2011-11-21 | 2014-12-25 | Zinniatek Tinsley Crescent | Single phase inverters cooperatively controlled to provide one, two, or three phase unipolar electricity |
| CN106849302A (en) * | 2017-03-14 | 2017-06-13 | 合肥工业大学智能制造技术研究院 | A kind of three-level formula radio energy transmission system used for electric vehicle |
| CN109256951A (en) * | 2018-09-29 | 2019-01-22 | 南京南瑞继保电气有限公司 | A kind of DC voltage conversion device and its control method |
| CN208581174U (en) * | 2018-01-31 | 2019-03-05 | 武汉征原电气有限公司 | A kind of current transformer auxiliary inversion unit for city rail vehicle |
-
2019
- 2019-07-09 CN CN201910616077.4A patent/CN110336470B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140375131A1 (en) * | 2011-11-21 | 2014-12-25 | Zinniatek Tinsley Crescent | Single phase inverters cooperatively controlled to provide one, two, or three phase unipolar electricity |
| CN106849302A (en) * | 2017-03-14 | 2017-06-13 | 合肥工业大学智能制造技术研究院 | A kind of three-level formula radio energy transmission system used for electric vehicle |
| CN208581174U (en) * | 2018-01-31 | 2019-03-05 | 武汉征原电气有限公司 | A kind of current transformer auxiliary inversion unit for city rail vehicle |
| CN109256951A (en) * | 2018-09-29 | 2019-01-22 | 南京南瑞继保电气有限公司 | A kind of DC voltage conversion device and its control method |
Non-Patent Citations (1)
| Title |
|---|
| 曹建博等: "10kVac-560Vdc/250kVA 电力电子变压器在交直流混合微电网中的控制策略*", 《2017年"电子技术应用"智能电网会议论文集》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509985A (en) * | 2020-04-27 | 2020-08-07 | 许继电气股份有限公司 | Self-blocking true bipolar power electronic transformer system and control method |
| CN114336953A (en) * | 2020-09-30 | 2022-04-12 | 西安西电高压开关有限责任公司 | Control method of energy router, central controller and energy router |
| CN114336953B (en) * | 2020-09-30 | 2023-10-03 | 西安西电高压开关有限责任公司 | Control method of energy router, central controller and energy router |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110336470B (en) | 2021-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107546844B (en) | Redundant fault-tolerant control method for cascaded power modules of power electronic transformer | |
| US9024465B2 (en) | Uninterruptible power system | |
| CN106505641B (en) | The AC/DC decoupling control method of modularization multi-level converter and its application | |
| CN103441691B (en) | A kind of mode of resonance electronic power convertor and converter device | |
| CN109256951B (en) | Direct-current voltage conversion device and control method thereof | |
| CN109301813B (en) | Fault control method, controller and medium-high voltage energy conversion system | |
| CN111224569B (en) | Low full-bridge proportion submodule hybrid MMC and direct current fault processing strategy thereof | |
| CN103219738A (en) | Direct current transmission system based on three-pole type structure | |
| CN103368182A (en) | Modularized multi-machine parallel-connection large-power APF (active power filter) control system and realization method | |
| WO2024037549A1 (en) | Slcc commutation system for novel electric power system, method for controlling slcc commutation system, storage medium, and program product | |
| CN109390963A (en) | A kind of the DC voltage default control method and application of voltage source converter | |
| CN110336470A (en) | Electric power electric transformer system, transformer and its fault traversing control method | |
| Sadeque et al. | Multiple grid-forming inverters in black-start: The challenges | |
| CN109873568A (en) | A kind of more DC port inverters and control method | |
| CN103219795A (en) | High-voltage and high-power uninterruptible power supply device | |
| CN112087134A (en) | Energy storage type direct coupling type direct current transformer and control method | |
| CN112003477A (en) | Direct-current transformer and soft start control method thereof | |
| US20220407316A1 (en) | Flexible excitation system and control method therefor | |
| Zhu et al. | Research on power modulation strategy for MMC-HVDC and LCC-HVDC in parallel HVDC system | |
| CN106019068B (en) | A kind of net pressure interruption detection and control method of EMU net side current transformer | |
| CN202004466U (en) | Series transformer-free cascade multilevel dynamic voltage regulator | |
| CN214154020U (en) | 10kV series active voltage regulating system | |
| CN115378268A (en) | DAB and bipolar short-circuit fault current limiting method thereof | |
| CN114844368A (en) | Direct-current transformer and low-voltage bidirectional fault current suppression method | |
| CN111030457B (en) | ISOP type direct-current distribution transformer and control method thereof |
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 |