CN110336473A - A kind of railway Special low-voltage power supply and half-closed loop control method - Google Patents
A kind of railway Special low-voltage power supply and half-closed loop control method Download PDFInfo
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- CN110336473A CN110336473A CN201910624020.9A CN201910624020A CN110336473A CN 110336473 A CN110336473 A CN 110336473A CN 201910624020 A CN201910624020 A CN 201910624020A CN 110336473 A CN110336473 A CN 110336473A
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
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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
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The present invention relates to a kind of railway Special low-voltage power supply and half-closed loop control method, the main circuit of the railway Special low-voltage power supply is made of seven converter module M1, five linked reactor L, three manifold type capacitor C, a single-phase uncontrollable rectifier bridge, the uncontrollable rectifier bridge of a three-phase, three output filter module F and a shared inductance Lm.The power supply carries out PWM rectification to converter module M1 by using rectification PWM loop pressure-stabilizing control algolithm, and single-phase uncontrollable rectifier bridge carries out electric current supplement reflux；Builtin voltage, which is promoted, to be realized using connection reactance L and coupling capacitor C to three converter module M1 using voltage increase half-closed loop control algorithm simultaneously；Finally realize that three converter module M1 carry out the output of three-phase 380V voltage using PWM closed loop inversion control algorithm, stable AC power source, and simple and ingenious structure are provided for railway low-voltage power system, it is easy to accomplish, cost of implementation is low, is conducive to expansion and popularization and application.
Description
Technical field
The invention belongs to electric railway low-voltage distribution technical field more particularly to a kind of railway Special low-voltage power supply and half
Closed loop control method.
Background technique
Railway power distribution is always the important component in railway power supply field, and railway signals equipment, leads to information equipment
Letter equipment, tunnel ventilation, illumination, melting snow on turnout junction etc. require railway low pressure 380V power supply.Wherein, part primary load needs two
Road even three road independent current sources are powered.However, ambient enviroment is severe on Xinjiang, Tibet, Qinghai and other places, lack public power
Net construction project causes low-tension supply to be difficult to obtain.But draws multiple power supplies in order to meet design requirement, and must connect and supplied
Electricity, this contradiction cannot be alleviated always.
Conventional measure is powered using 27.5/0.22kV or 27.5/0.4kV transformer.On the one hand, 27.5kV is by iron
Road locomotive impact and nonlinear influence, there are voltage fluctuations and voltage harmonic, cause the side 0.22kV and 0.4kV quality of voltage
Deteriorate, a series of low-voltage loads are unable to reliably working.On the other hand, sub-load require three-phase 380V power supply, and such 27.5/
0.4kV transformer can only be obtained in part traction substation, and AT institute, subregion can not obtain along the line, such transformer is caused to answer
It is limited with range.
Summary of the invention
To solve the above-mentioned problems in the prior art, the present invention provides one kind to be applicable to single-phase input and three-phase
Occasion is inputted, stable 380V power supply is provided for railway low-voltage power distribution system, and structure is simple, ingenious, it is easy to accomplish, it is implemented as
The half-closed loop control method of this low railway Special low-voltage power supply and the railway Special low-voltage power supply.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of railway Special low-voltage power supply, includes main circuit, and the main circuit is by seven converter module M1, five companies
Connect reactor L, three manifold type capacitor C, a single-phase uncontrollable rectifier bridge, the uncontrollable rectifier bridge of a three-phase, three it is defeated
Filter module F and a shared inductance Lm composition out；Wherein, the input terminal of first converter module M1 is equipped with and is respectively connected to
First linked reactor L and second linked reactor L in the A phase and C phase of input side, first converter module
The output end of M1 is parallel with single-phase uncontrollable rectifier bridge, and the exchange of the single-phase uncontrollable rectifier bridge is flanked into input side
In B phase, while the DC side parallel of the single-phase uncontrollable rectifier bridge has second converter module M1, third converter module
M1 and the 4th converter module M1, second converter module M1, third converter module M1 and the 4th converter
One of bridge arm of module M1 is respectively equipped with third linked reactor L, the 4th linked reactor L and the 5th connection electricity
Anti- device, and it is connected to first manifold type capacitor C, second manifold type capacitor C and third manifold type capacitor C
P point on；Another bridge of second converter module M1, third converter module M1 and the 4th converter module M1
Arm is connected to the q point of first manifold type capacitor C, second manifold type capacitor C and third manifold type capacitor C
On；The p point of first manifold type capacitor C, second manifold type capacitor C and third manifold type capacitor C simultaneously
Be connected in input side A phase, B phase and C phase, first manifold type capacitor C, second manifold type capacitor C and
The q point of third manifold type capacitor C is connected on the input terminal of the uncontrollable rectifier bridge of three-phase；The uncontrollable rectifier bridge of three-phase
Output end be parallel with large capacity storage capacitor, the both ends of the large capacity storage capacitor are parallel with the 5th converter module
M1, the 6th converter module M1 and the 7th converter module M1, the 5th converter module M1, the 6th converter
The exchange side of module M1 and the 7th converter module M1 is respectively equipped with first filter module F, second filter module F
With third filter module F；First filter module F, second filter module F and third filter module
One of output end of F is respectively the A phase output terminal, B phase output terminal and C phase output terminal of low-tension supply, another output
It forms asterism and draws the ground wire as low-tension supply, while the asterism is by sharing N of the inductance Lm extraction as low-tension supply
Phase output terminal.
Further, seven converter module M1 are made of 4 IGBT and energy-storage capacitor, and 4 IGBT groups
DC side parallel at single-phase full control H bridge, and the single-phase full control H bridge has the energy-storage capacitor.
Further, three output filter module F are made of filter inductance, filter capacitor, damping resistance, the filter
The output end of input terminal of the input terminal of wave inductance as filter module F, the filter inductance is parallel with the filtering of serial connection
Capacitor and damping resistance.
Further, the input side of railway Special low-voltage power supply uses A, B, C three-phase input, or accesses fire using A phase
Line, B phase access the single-phase input of zero curve, or in significant power demand, A and C parallel connection are accessed firewire, B phase accesses zero curve.
A kind of half-closed loop control method of railway Special low-voltage power supply, first with full-controlled rectifier PWM pressure stabilizing control method
High-power energy remittance is carried out, offset voltage, the electricity that will fall then are generated using semiclosed loop PWM inversion control algorithm in inside
Pressure compensates, and compensated voltage is coupled using capacitor, and it is uncontrollable that the voltage after then promoting coupling carries out three-phase
Rectification, the DC voltage after finally rectifying are exported by the inversion of three-phase separate phase, to be suitable for uncompensated load.
Further, the PWM rectifying and voltage-stabilizing control is specifically, control PWM rectification, B phase are uncontrollable entirely with C phase by A phase
The mode of rectification realizes the stabilization of DC voltage；The voltage increase half-closed loop control specifically, apply with it is single-phase can not
Control 3 converter module M1 of rectifier bridge parallel connection, it is assumed that input side voltage depth is S volt, then corresponding DC voltage is D at this time
Volt, then the duty ratio of 3 converter module M1 output is always S/D；The PWM inversion control algorithm specifically, apply with
Three groups of converter M1 modules of the uncontrollable rectifier bridge of three-phase and large capacity storage capacitor parallel connection export and stablize three-phase 380V.
The beneficial effects of the present invention are:
The present invention is applicable to single-phase input and three-phase input through the above technical solutions, being applied in electric railway
Occasion provides stable 380V power supply for railway low-voltage power distribution system, and realizes that builtin voltage is promoted, without increasing sensor
Quantity, save material, keep power supply architecture simpler, ingenious, while using multiple identical converter module M1 etc., it is real
Modularized design and installation are showed, have been conducive to maintenance and production and assembly, effectively reduce difficulty of processing and cost, be conducive to popularize
It promotes and applies and expands.
Detailed description of the invention
Fig. 1 is the electrical block diagram of railway Special low-voltage power supply embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As shown in Figure 1:
The railway Special low-voltage power supply provided in an embodiment of the present invention, includes main circuit 100, the main circuit 100
By seven converter module M1 (that is: first converter module M1,1, second converter module M1 5, third converter mould
Block M1 6, the 4th converter module M1 7, the 5th converter module M1 16, the 6th converter module M1 17 and the 7th
A converter module M1 18), five linked reactor L (that is: first linked reactor L, 2, second linked reactor L
3, third linked reactor L 8, the 4th linked reactor L 9 and the 5th linked reactor L 10), three manifold type electricity
Container C (that is: first manifold type capacitor C 11, second manifold type capacitor C 12 and third manifold type capacitor C
13), a single-phase uncontrollable rectifier bridge, the uncontrollable rectifier bridge of a three-phase, three output filter module F (that is: first filtering
Device module F 19, second filter module F 20 and third filter module F 21) and a shared inductance Lm composition；Its
In, the input terminal of first converter module M1 1 is equipped with the first connection electricity being respectively connected in the A phase and C phase of input side
Anti- device L 2 and second linked reactor L 3, the output end of first converter module M1 1 are parallel with single-phase uncontrollable
Rectifier bridge 4, and the exchange of the single-phase uncontrollable rectifier bridge 4 flanks in the B phase of input side, while described single-phase uncontrollable
The DC side parallel of rectifier bridge 4 has second converter module M1 5, third converter module M1 6 and the 4th converter mould
Its of block M1 7, second converter module M1 5, third converter module M1 6 and the 4th converter module M1 7
In a bridge arm be respectively equipped with 8, the 4th linked reactor L 9 and the 5th linked reactor L of third linked reactor L
10, and it is connected to first manifold type capacitor C, 11, second manifold type capacitor C 12 and third manifold type electricity
On the p point of container C 13；Second converter module M1 5, third converter module M1 6 and the 4th converter module
Another bridge arm of M1 7 is connected to first manifold type capacitor C, 11, second manifold type capacitor C 12 and third
On the q point of a manifold type capacitor C 13；Described first manifold type capacitor C, 11, second manifold type capacitor C simultaneously
The p point of 12 and third manifold type capacitor C 13 is connected in input side A phase, B phase and C phase, first coupling
The q point of formula capacitor C 11, second manifold type capacitor C 12 and third manifold type capacitor C 13 are connected to three-phase not
On the input terminal of controllable rectifier bridge 14；The output end of the uncontrollable rectifier bridge 14 of three-phase is parallel with large capacity storage capacitor 15,
The both ends of the large capacity storage capacitor 15 are parallel with the 5th converter module M1 16, the 6th 17 and of converter module M1
7th converter module M1 18, the 5th converter module M1 16, the 6th converter module M1 17 and the 7th
The exchange side of converter module M1 18 is respectively equipped with first filter module F, 19, second filter module F 20 and
Three filter module F 21；First filter module F, 19, second filter module F 20 and third filtering
One of output end of device module F 21 is respectively the A phase output terminal, B phase output terminal and C phase output terminal of low-tension supply, another
A output end forms asterism and draws the ground wire as low-tension supply, while the asterism draws conduct by sharing inductance Lm 22
The N phase output terminal of low-tension supply.Moreover, seven converter module M1 are made of 4 IGBT and energy-storage capacitor, and 4
IGBT forms single-phase full control H bridge, and the DC side parallel of the single-phase full control H bridge has the energy-storage capacitor；Three output filters
Wave module F is made of filter inductance, filter capacitor, damping resistance, and the input terminal of the filter inductance is as the defeated of filter module F
Enter end, the output end of the filter inductance is parallel with the filter capacitor and damping resistance of serial connection.
The working principle of railway Special low-voltage power supply of the present invention are as follows: first with full-controlled rectifier PWM pressure stabilizing control method into
Row high-power energy imports, and then generates offset voltage, the voltage that will fall using semiclosed loop PWM inversion control algorithm in inside
It compensates, compensated voltage is coupled using capacitor, and it is uncontrollable whole that the voltage after then promoting coupling carries out three-phase
Stream, the DC voltage after finally rectifying are exported by the inversion of three-phase separate phase, to be suitable for uncompensated load.Wherein, the PWM is whole
Pressure stabilizing control is flowed specifically, control PWM rectification, the mode of the uncontrollable rectification of B phase realize DC voltage entirely with C phase by A phase
Stablize；The voltage increase half-closed loop control is specifically, apply in 3 converter modules in parallel with single-phase uncontrollable rectifier bridge
M1, it is assumed that input side voltage depth is S volt, then corresponding DC voltage is D volt at this time, then 3 converter module M1 are exported
Duty ratio be always S/D (such as: assuming that input side voltage depth be S volt, then at this time corresponding DC voltage be D lie prostrate, then 3
The duty ratio of converter module M1 output is always S/D；S/D has been pwm signal controlling party required for converter module M1
Method does not have to carry out closed-loop, sensor etc. is omitted, it is only necessary to the minimum drop depth S of voltage is set, so being half
Closed loop.)；The PWM inversion control algorithm is specifically, apply in parallel with the uncontrollable rectifier bridge of three-phase and large capacity storage capacitor
Three groups of converter M1 modules, export stablize three-phase 380V.
In this way, railway Special low-voltage power supply of the present invention is applied to railway power low-voltage distribution, it can be by power quality
Severe single-phase 220V or three-phase 380V is converted to stable 380V power supply, on the one hand by voltage fluctuation existing for traction side and
Voltage harmonic is isolated, and is exported perfect sine power supply, on the other hand can be compatible with single-phase input and three-phase input simultaneously, reach simultaneous
Hold rail traction substation, along the line AT institute and subregion can install, enrich whole functionality；And by using this
The control method is invented to realize that builtin voltage is promoted, without increasing the quantity of sensor, material is saved, makes power supply architecture more
Add simple, ingenious, while using multiple identical converter module M1 etc., realize modularized design and installation, be conducive to
Maintenance and production and assembly, effectively reduce difficulty of processing and cost, are conducive to popularize application and expand, especially power list
First part be it is universal, can be replaced mutually, there is stronger engineering practice value.
Certainly, the input side of railway Special low-voltage power supply uses A, B, C three-phase input, or accesses firewire, B using A phase
The single-phase input of zero curve is mutually accessed, or in significant power demand, A and C parallel connection is accessed into firewire, B phase accesses zero curve.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (6)
1. a kind of railway Special low-voltage power supply, it is characterised in that: include main circuit (100), the main circuit (100) is by seven
Converter module M1, five linked reactor L, three manifold type capacitor C, a single-phase uncontrollable rectifier bridge, a three-phase
Uncontrollable rectifier bridge, three output filter module F and a shared inductance Lm composition；Wherein, first converter module M1 (1)
Input terminal be equipped with and be respectively connected to first linked reactor L (2) in the A phase and C phase of input side and second connection is electric
Anti- device L (3), the output end of first converter module M1 (1) are parallel with single-phase uncontrollable rectifier bridge (4), and the list
The exchange of mutually uncontrollable rectifier bridge (4) flanks in the B phase of input side, while the single-phase uncontrollable rectifier bridge (4) is straight
Stream side is parallel with second converter module M1 (5), third converter module M1 (6) and the 4th converter module M1 (7), institute
State one of them of second converter module M1 (5), third converter module M1 (6) and the 4th converter module M1 (7)
Bridge arm is respectively equipped with third linked reactor L (8), the 4th linked reactor L (9) and the 5th linked reactor (10),
And it is connected to first manifold type capacitor C (11), second manifold type capacitor C (12) and third manifold type capacitor
On the p point of device C (13)；Second converter module M1 (5), third converter module M1 (6) and the 4th converter mould
Another bridge arm of block M1 (7) is connected to first manifold type capacitor C (11), second manifold type capacitor C (12)
On the q point of third manifold type capacitor C (13)；First manifold type capacitor C (11), second manifold type simultaneously
The p point of capacitor C (12) and third manifold type capacitor C (13) is connected in input side A phase, B phase and C phase, described
The q point of first manifold type capacitor C (11), second manifold type capacitor C (12) and third manifold type capacitor C (13)
It is connected on the input terminal of the uncontrollable rectifier bridge of three-phase (14)；The output end of the uncontrollable rectifier bridge of three-phase (14) is parallel with greatly
Capacity storage capacitor (15), the both ends of the large capacity storage capacitor (15) are parallel with the 5th converter module M1 (16),
Six converter module M1 (17) and the 7th converter module M1 (18), the 5th converter module M1 (16), the 6th
A converter module M1 (17) is respectively equipped with first filter module F with the side that exchanges of the 7th converter module M1 (18)
(19), second filter module F (20) and third filter module F (21)；First filter module F (19),
One of output end of second filter module F (20) and third filter module F (21) are respectively the A of low-tension supply
Phase output terminal, B phase output terminal and C phase output terminal, another output form asterism and draw the ground wire as low-tension supply, together
When the asterism by sharing inductance Lm (22) draw N phase output terminal as low-tension supply.
2. railway Special low-voltage power supply described in claim 1, it is characterised in that: seven converter module M1 are by 4
IGBT and energy-storage capacitor composition, and 4 IGBT form single-phase full control H bridge, and the DC side parallel of the single-phase full control H bridge
There is the energy-storage capacitor.
3. railway Special low-voltage power supply according to claim 1, it is characterised in that: three output filter module F by
Filter inductance, filter capacitor, damping resistance composition, input terminal of the input terminal of the filter inductance as filter module F are described
The output end of filter inductance is parallel with the filter capacitor and damping resistance of serial connection.
4. railway Special low-voltage power supply according to claim 1, it is characterised in that: the input side of railway Special low-voltage power supply
Firewire is accessed using A, B, C three-phase input, or using A phase, B phase accesses the single-phase input of zero curve, or in high-power need
When asking, A and C parallel connection is accessed into firewire, B phase accesses zero curve.
5. a kind of half-closed loop control method of railway Special low-voltage power supply, it is characterised in that: first with full-controlled rectifier PWM pressure stabilizing
Control method carries out high-power energy remittance, then generates offset voltage using semiclosed loop PWM inversion control algorithm in inside, will
The voltage fallen compensates, and the voltage of compensation is coupled using capacitor, and the voltage after then promoting coupling carries out three-phase
Uncontrollable rectification, the DC voltage after finally rectifying are exported by the inversion of three-phase separate phase, to be suitable for uncompensated load.
6. according to the method described in claim 5, it is characterized by: PWM rectifying and voltage-stabilizing control is specifically, pass through A phase and C
Mutually full control PWM rectification, the mode of the uncontrollable rectification of B phase realize the stabilization of DC voltage；The voltage increase half-closed loop control
Specifically, applying in the 3 converter module M1s in parallel with single-phase uncontrollable rectifier bridge, it is assumed that input side Voltage Drop depth is
S volt, then corresponding DC voltage is D volt at this time, then the duty ratio of 3 converter module M1 output is always S/D；The PWM
Inversion control algorithm is specifically, apply in the three group converter M1s in parallel with the uncontrollable rectifier bridge of three-phase and large capacity storage capacitor
Module exports and stablizes three-phase 380V.
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