CN108011399A - Source of resistance high-speed engine two-stage boosting grid-connected system based on VIENNA rectifier - Google Patents
Source of resistance high-speed engine two-stage boosting grid-connected system based on VIENNA rectifier Download PDFInfo
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- CN108011399A CN108011399A CN201810014508.5A CN201810014508A CN108011399A CN 108011399 A CN108011399 A CN 108011399A CN 201810014508 A CN201810014508 A CN 201810014508A CN 108011399 A CN108011399 A CN 108011399A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
-
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/12—Stator flux based control involving the use of rotor position or rotor speed sensors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/007—Control circuits for doubly fed generators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of source of resistance high-speed engine two-stage boosting grid-connected system based on VIENNA rectifier, the source of resistance high-speed engine two-stage boosting grid-connected system based on VIENNA rectifier includes：One high-speed engine, a VIENNA rectifier, a Z-source inverter, a three-phase filter reactor and two sets of controllers.The invention also discloses the control method of said system, pusher side introduces VIENNA rectifier, rotating speed and rectifier input power factor to high-speed engine carry out double-closed-loop control, carry out first class boost, net side introduces Z-source inverter, double-closed-loop control is carried out to source of resistance network capacitance voltage and grid-connected power factor, carries out another first class boost.The present invention can solve the problems, such as that the distortion of high-speed engine stator current is serious, the voltage stress of switching device be reduced, so as to improve the stability and efficiency of system.
Description
Technical field
The invention belongs to generator connecting in parallel with system control field, and in particular to a kind of source of resistance based on VIENNA rectifier is at a high speed
Generator two-stage boosting grid-connected system and its control method.
Background technology
The energy is the power producer for promoting economic growth and social progress, is the weight for being related to national economy, social stability
Want material.With the rapid development of China's modern industry, the fossil energy such as oil, natural gas and coal is petered out, environment is asked
Inscribe the significant problem increasingly prominent, the energy and environment have been faced as China.
Waste heat refer to it is that coal, oil, natural gas etc. emit after industrial utilization, other lifes can not be continued to participate in
The energy of production process.It is using high temperature heat as the form of expression, using exhaust gas, waste residue and waste water as energy carrier.China's residual heat resources
It is very abundant, account for 20% or so of industrial total energy consumption.Therefore, UTILIZATION OF VESIDUAL HEAT IN has a vast market prospect.
High Speed Permanent Magnet Synchronous Generator has the advantages that efficient, reliability is high, compact-sized, maintenance is small, same with this
When, high-speed engine is connected directly the generating set of composition with expansion turbine, and centre can save deceleration device, can greatly reduce
System bulk, improves system effectiveness and reliability.Therefore, high-speed engine is widely used in afterheat generating system.
Conventional high rate generator uses six switch PWM rectification topology of three-phase, continuous with high-speed engine rated speed
Improve, the output frequency of high-speed engine greatly improves, and is the rectification tune of high-speed engine it could even be possible to reaching thousand hertz
System brings difficulty, and resulting generator unit stator electric current harmonic wave can not only increase the loss and temperature rise of high-speed engine, can also
Increase its torque pulsation, threaten system safety.At the same time, the direct phase of switching voltage stress of boost capability and net side current transformer
Close, higher boosting gain helps to reduce the voltage stress of switching device.Therefore, it is necessary to design a kind of high reliability, height
The high-speed engine grid-connected system and its control method of boost capability.
The content of the invention
The defects of for described in background technology or deficiency, the present invention provides a kind of source of resistance based on VIENNA rectifier
High-speed engine two-stage boosting grid-connected system and its control method, system boost capability is strong, and reliability is high.
A kind of source of resistance high-speed engine two-stage boosting grid-connected system based on VIENNA rectifier, including：One high speed
Magneto alternator（Rated speed is in more than 10000rpm）, a pusher side VIENNA rectifier, a net side source of resistance it is inverse
Become device（The Z-source inverters such as Z-source inverter, quasi- Z-source inverter or half quasi- Z-source inverter）, a three-phase filter reactor and
Two sets of controllers（Controller 1 and controller 2）, two sets of controllers respectively control VIENNA rectifier and Z-source inverter
System.
The VIENNA rectifier is composed in parallel by 33 half-bridge circuits and dc-link capacitance, each half-bridge circuit
By bridge armf, bridge armmAnd bridge armnComposition, wherein, bridge armfIt is made of the diode of two series connection, bridge armmBy a diode,
One IGBT and diode is followed in series to form, bridge armnIt is made of two Diode series, bridge armfAnd bridge armnIt is in parallel
Afterwards, common cathode is connected tomThe collector of bridge arm IGBT, common anode are connected tomThe transmitting collection of bridge arm IGBT；The direct current is female
Line is made of the capacitance of two series connection；The impedance source network and three that the Z-source inverter is made of inductance, capacitance, diode
A 3 IGBT half-bridge circuits compose in parallel；The grid-connected filter reactor is made of 3 AC inductances.Wherein, high-speed permanent magnetic is same
Walk generator threephase stator respectively with VIENNA rectifierf 1 Bridge arm,f 2 Bridge arm andf 3 The corresponding midpoint of bridge arm is connected；
VIENNA rectifier is parallel to dc bus and VIENNA rectifierf 1 Bridge arm,f 2 Bridge arm andf 3 The midpoint of bridge arm connects jointly
To the midpoint of two capacitances of dc bus；Dc bus is in parallel with the input terminal of Z-source inverter；Z-source inverter three-phase
Output is connected to the grid after connecing filter reactor.
The controller 1 is used for the rotating speed, rotor position angle and threephase stator electric current for gathering magneto alternator, then
The rotating speed and VIENNA rectifier input power factor of generator are controlled by SVPWM pulse signals；The controller 2
For gathering terminal voltage, Z-source inverter three-phase grid voltage and the Z-source inverter three-phase grid of source of resistance network capacitance
Electric current, then constructs the pwm pulse signal with shoot-through zero vector, to source of resistance network capacitance voltage by straight-through control strategy
It is controlled with grid-connected power factor.
The control method of the above-mentioned source of resistance high-speed engine two-stage boosting grid-connected system based on VIENNA rectifier includes
Following steps：
(1) rotating speed of High Speed Permanent Magnet Synchronous Generator is detected in real timeω r , rotor position angleӨ r Determine with the three-phase of high-speed engine
Electron current；
(2) rotor position angle is utilizedӨ r The threephase stator electric current of high-speed engine is carried outdqConversion, obtains three-phase
Stator currentdqAxis component；
(3) by pusher side double-closed-loop control method to high-speed engine rotating speed, generator unit stator electric currentdqAxis component is compared
Compared with calculating, pusher side voltage reference value is obtainedαβComponent；
(4) detection Z-source inverter three-phase grid line voltage and phase current, and then estimate phase angle in real timeӨ；
(5) phase angle is utilizedӨZ-source inverter three-phase grid voltage and three-phase grid electric current are carried outdqConversion, obtains
To three-phase grid voltagedqAxis component and three-phase grid electric currentdqAxis component；
(6) voltage of source of resistance network capacitance is detected in real timeV C1 ；
(7) by net side double-closed-loop control method to Z-source inverter three-phase grid voltage, grid-connected currentdqAxis component,
Phase angleӨWith source of resistance network capacitance voltageV C1 Calculating is compared, obtains voltage on line side reference valueαβComponent；
(8) by straight-through duty cycled 0 (7) voltage reference value obtained inαβThe space vector of component input tape shoot-through zero vector
Pwm controller, obtains the grid-connected control wave of Z-source inverter.
Pusher side double-closed-loop control in the step (3) is small with the stabilization of speed of high-speed engine and Stator Current Harmonic
Target in order to control.
Pusher side voltage reference value in the step (3)αβComponent specifically obtains by the following method：High-speed engine is turned
The reference value and detected value of speed are compared, by obtaining high-speed engine after pi regulatorqShaft current reference value, gives at a high speed
GeneratordShaft current reference value is 0, by high-speed power generation machine statordqAfter shaft current reference value and detected value are compared, pass through
Pi regulator, which obtains modulating required voltage, to be givendqAxis component, then pass throughdq-αβConversion is translated into pusher side Voltage Reference
ValueαβComponent.
In the step (7) net side double-closed-loop control method with source of resistance network capacitance voltage stabilization and unit power because
The grid-connected target in order to control of number.
Voltage on line side reference value in the step (7)αβComponent specifically obtains by the following method：By impedance source network electricity
The reference value and detected value for holding voltage are compared, by obtaining grid-connected current after pi regulatordAxis reference value, gives grid-connected electricity
StreamqAxis reference value is 0, by grid-connected currentdqAfter axis reference value and detected value are compared, modulation institute is obtained by pi regulator
The voltage needed givesdqAxis component, then pass throughdq-αβConversion is translated into voltage on line side reference valueαβComponent.
The control method of source of resistance high-speed engine two-stage based on the VIENNA rectifier boosting grid-connected system, leads to
Cross controller 1 to be controlled pusher side, net side is controlled by controller 2, so as to fulfill two-stage boost function.
The present invention is had an advantage that compared with prior art：
(1) converter system being made of high-speed engine, VIENNA rectifier and Z-source inverter, its fairing and tradition
Six switch PWM rectifier of the three-phase active switching devices less compared to needs, and the high-speed engine grid-connected system is in source of resistance
When inverter is led directly to, remain to work normally, the reliability and stability with higher are compared with conventional topologies；
(2) since VIENNA rectifier has the equivalent switching frequency of higher, have in the case where input AC frequency is higher
The generator unit stator electric current harmonic wave of sine degree higher；
(3) since VIENNA rectifier also has boost function, the boosting gain of Z-source inverter has been shared, so as to reduce
The switching voltage stress of Z-source inverter.
Brief description of the drawings
Fig. 1 is the source of resistance based on VIENNA rectifier that present example provides（Half quasi- Z sources）High-speed engine two-stage
Boost grid-connected system structure diagram.
Fig. 2 is that the quasi- Z sources high-speed engine two-stage boosting of half based on VIENNA rectifier that present example provides is grid-connected
The control block diagram of system.
Embodiment
In order to more specifically describe the present invention, the present invention will be further described with reference to the accompanying drawings and examples.Should
Work as understanding, specific embodiment described herein is only used for explaining the present invention, is not intended to limit the present invention.
A kind of as shown in Figure 1, source of resistance based on VIENNA rectifier（Half quasi- Z sources）The grid-connected system of high-speed power generation two-stage boosting
System, including：One High Speed Permanent Magnet Synchronous Generator（Rated speed is in more than 10000rpm）, a pusher side VIENNA rectifier,
One net side Z-source inverter（Half quasi- Z-source inverter）, three-phase filter reactor and two sets of controllers（1 He of controller
Controller 2）.Wherein：
VIENNA rectifier is composed in parallel by 33 half-bridge circuits and dc-link capacitance, each half-bridge circuit is by bridge armf、
Bridge armmAnd bridge armnComposition, wherein, bridge armfIt is made of the diode of two series connection, bridge armmBy a diode, an IGBT
It is followed in series to form with a diode, bridge armnIt is made of two Diode series, bridge armfAnd bridge armnAfter parallel connection, common
Cathode is connected tomThe collector of bridge arm IGBT, common anode are connected tomThe transmitting collection of bridge arm IGBT；Dc bus is by two series connection
Capacitance composition；The half quasi- Z source networks and three 3 IGBT half-bridges that half quasi- Z-source inverter is made of inductance, capacitance, diode
Circuit in parallel forms；Grid-connected filter reactor is made of 3 AC inductances.The threephase stator difference of High Speed Permanent Magnet Synchronous Generator
With VIENNA rectifierf 1 Bridge arm,f 2 Bridge arm andf 3 The corresponding midpoint of bridge arm is connected；VIENNA rectifier is parallel to dc bus
And VIENNA rectifierf 1 Bridge arm,f 2 Bridge arm andf 3 The midpoint of bridge arm is commonly connected to the midpoint of two capacitances of dc bus；Directly
It is in parallel with the input terminal of half quasi- Z-source inverter to flow busbar；Half quasi- Z-source inverter three-phase output is incorporated to electricity after connecing filter reactor
Net.
Controller 1 is used for the rotating speed, rotor position angle and threephase stator electric current for gathering magneto alternator, then passes through
SVPWM pulse signals are controlled the rotating speed and VIENNA rectifier input power factor of generator；Controller 2 is used to gather
The terminal voltage of half quasi- Z source networks capacitance, half quasi- Z-source inverter three-phase grid voltage and half quasi- Z-source inverter three-phase grid electric current,
The pwm pulse signal with shoot-through zero vector is then constructed by straight-through control strategy, half-and-half quasi- Z source networks capacitance voltage and simultaneously
Net power factor is controlled.
The control block diagram of half quasi- Z source high-speed power generation two-stage boosting grid-connected system of the present embodiment based on VIENNA rectifier
As shown in Fig. 2, control method includes the following steps：
(1) rotating speed of High Speed Permanent Magnet Synchronous Generator is detected in real timeω r , rotor position angleӨ r Determine with the three-phase of high-speed engine
Electron current；
(2) rotor position angle is utilizedӨ r The threephase stator electric current of high-speed engine is carried outdqConversion, obtains three-phase
Stator currentdqAxis component；
(3) by pusher side double-closed-loop control method to high-speed engine rotating speed, generator unit stator electric currentdqAxis component is compared
Compared with calculating, pusher side voltage reference value is obtainedαβComponent；Wherein, pusher side double-closed-loop control with the stabilization of speed of high-speed engine and is determined
The small target in order to control of electron current harmonic wave；Pusher side voltage reference valueαβComponent specifically obtains by the following method：High-speed engine is turned
The reference value and detected value of speed are compared, by obtaining high-speed engine after pi regulatorqShaft current reference value, gives at a high speed
GeneratordShaft current reference value is 0, by high-speed power generation machine statordqAfter shaft current reference value and detected value are compared, pass through
Pi regulator, which obtains modulating required voltage, to be givendqAxis component, then pass throughdq-αβConversion is translated into pusher side Voltage Reference
ValueαβComponent；
(4) voltage reference value that will be obtained in (3)αβComponent andV C2 、V C3 Difference input space vector pulse width modulation
Controller, obtains the control wave of VIENNA rectifier；
(5) half quasi- Z-source inverter three-phase grid line voltage of detection and phase current, and then estimate phase angle in real timeӨ；
(6) phase angle is utilizedӨHalf-and-half quasi- Z-source inverter three-phase grid voltage and three-phase grid electric current carry outdqConversion,
Obtain three-phase grid voltagedqAxis component and three-phase grid electric currentdqAxis component；
(7) voltage of half quasi- Z source networks capacitance is detected in real timeV C1 ；
(8) net side double-closed-loop control method half-and-half quasi- Z-source inverter three-phase grid voltage, grid-connected current are passed throughdqAxis component,
Phase angleӨWith half quasi- Z source networks capacitance voltageV C1 Calculating is compared, obtains voltage on line side reference valueαβComponent；Wherein, net side
Double-closed-loop control method is stablized with half quasi- Z source networks capacitance voltage and the grid-connected target in order to control of unity power factor；Voltage on line side
Reference valueαβComponent specifically obtains by the following method：The reference value of half quasi- Z source networks capacitance voltage and detected value are compared,
By obtaining grid-connected current after pi regulatordAxis reference value, gives grid-connected currentqAxis reference value is 0, by grid-connected currentdqAxis is joined
Examine value and after detected value is compared, obtain modulating required voltage by pi regulator and givedqAxis component, then pass throughdq-αβ
Conversion is translated into voltage on line side reference valueαβComponent；
(9) by straight-through duty cycled 0 (7) voltage reference value obtained inαβThe space vector of component input tape shoot-through zero vector
Pwm controller, obtains the grid-connected control wave of half quasi- Z-source inverter.
The example is only an example of the present invention, and not all example, all modifications under thinking of the present invention and principle,
Improvement project belongs to protection scope of the present invention.
Claims (10)
1. a kind of high-speed engine two-stage boosting grid-connected system based on VIENNA rectifier, it is characterised in that including a height
Fast magneto alternator（Rated speed is in more than 10000rpm）, VIENNA rectifier, a Z-source inverter（Z
The Z-source inverters such as source inventer, quasi- Z-source inverter or half quasi- Z-source inverter）, a three-phase filter reactor and two sets of controls
Device processed（Controller 1 and controller 2）, two sets of controllers are respectively controlled VIENNA rectifier and Z-source inverter.
2. the high-speed engine two-stage boosting grid-connected system according to claim 1 based on VIENNA rectifier, its feature
It is, the VIENNA rectifier is composed in parallel by 33 half-bridge circuits and dc-link capacitance, each half-bridge circuit is by bridge
Armf, bridge armmAnd bridge armnComposition, wherein, bridge armfIt is made of the diode of two series connection, bridge armmBy a diode, one
IGBT and diode is followed in series to form, bridge armnIt is made of two Diode series, bridge armfAnd bridge armnAfter parallel connection, altogether
Same cathode is connected tomThe collector of bridge arm IGBT, common anode are connected tomThe transmitting collection of bridge arm IGBT；The dc bus by
The capacitance composition of two series connection；Impedance source network that the Z-source inverter is made of inductance, capacitance, diode and three 3
A IGBT half-bridge circuits compose in parallel；The grid-connected filter reactor is made of 3 AC inductances.
3. the high-speed engine two-stage boosting grid-connected system according to claim 1 based on VIENNA rectifier, its feature
Be, the threephase stator of the High Speed Permanent Magnet Synchronous Generator respectively with VIENNA rectifierf 1 Bridge arm,f 2 Bridge arm andf 3 Bridge arm
Corresponding midpoint is connected；The VIENNA rectifier is parallel to dc bus and VIENNA rectifierf 1 Bridge arm,f 2 Bridge arm andf 3
The midpoint of bridge arm is commonly connected to the midpoint of two capacitances of dc bus；The input terminal of the dc bus and Z-source inverter
It is in parallel；The Z-source inverter three-phase output end is connected to the grid after connecing filter reactor.
4. the high-speed engine two-stage boosting grid-connected system according to claim 1 based on VIENNA rectifier, its feature
It is, the controller 1 is used for the rotating speed, rotor position angle and threephase stator electric current for gathering magneto alternator, then logical
SVPWM pulse signals are crossed to be controlled the rotating speed and VIENNA rectifier input power factor of generator；The controller 2 is used
In the terminal voltage of collection source of resistance network capacitance, Z-source inverter three-phase grid voltage and Z-source inverter three-phase grid electricity
Stream, then constructs the pwm pulse signal with shoot-through zero vector by straight-through control strategy, to source of resistance network capacitance voltage and
Grid-connected power factor is controlled.
5. a kind of control method of the source of resistance high-speed engine two-stage boosting grid-connected system based on VIENNA rectifier, its feature
It is, high-speed engine grid-connected system is included the following steps using the topological structure described in claim 1, its control method：
(1) rotating speed of High Speed Permanent Magnet Synchronous Generator is detected in real timeω r , rotor position angleӨ r Determine with the three-phase of high-speed engine
Electron current；
(2) rotor position angle is utilizedӨ r The threephase stator electric current of high-speed engine is carried outdqConversion, obtains three-phase and determines
Electron currentdqAxis component；
(3) by pusher side double-closed-loop control method to high-speed engine rotating speed, generator unit stator electric currentdqAxis component is compared
Compared with calculating, pusher side voltage reference value is obtainedαβComponent；
(4) detection Z-source inverter three-phase grid line voltage and phase current, and then estimate phase angle in real timeӨ；
(5) phase angle is utilizedӨZ-source inverter three-phase grid voltage and three-phase grid electric current are carried outdqConversion, obtains
To the dq axis components of three-phase grid voltage and the dq axis components of three-phase grid electric current；
(6) voltage of source of resistance network capacitance is detected in real timeV C1 ；
(7) by net side double-closed-loop control method to Z-source inverter three-phase grid voltage, grid-connected currentdqAxis component,
Phase angleӨWith source of resistance network capacitance voltageV C1 Calculating is compared, obtains voltage on line side reference valueαβComponent；
(8) by straight-through duty cycled 0 (7) voltage reference value obtained inαβThe space vector of component input tape shoot-through zero vector
Pwm controller, obtains the grid-connected control wave of Z-source inverter.
6. the source of resistance high-speed engine two-stage boosting grid-connected system according to claim 5 based on VIENNA rectifier
Control method, it is characterised in that the pusher side double-closed-loop control in the step (3) with the stabilization of speed of high-speed engine and is determined
The small target in order to control of electron current harmonic wave.
7. the source of resistance high-speed engine two-stage boosting grid-connected system according to claim 5 based on VIENNA rectifier
Control method, it is characterised in that pusher side voltage reference value in the step (3)αβComponent specifically obtains by the following method：Will
The reference value and detected value of high-speed engine rotating speed are compared, by obtaining high-speed engine after pi regulatorqShaft current is joined
Value is examined, gives high-speed enginedShaft current reference value is 0, by high-speed power generation machine statordqShaft current reference value and detected value into
Row relatively after, obtain modulating required voltage by pi regulator and givedqAxis component, then pass throughdq-αβConversion is translated into
Pusher side voltage reference valueαβComponent.
8. the source of resistance high-speed engine two-stage boosting grid-connected system according to claim 5 based on VIENNA rectifier
Control method, it is characterised in that net side double-closed-loop control method is with source of resistance network capacitance voltage stabilization in the step (7)
With the grid-connected target in order to control of unity power factor.
9. the source of resistance high-speed engine two-stage boosting grid-connected system according to claim 5 based on VIENNA rectifier
Control method, it is characterised in that voltage on line side reference value in the step (7)αβComponent specifically obtains by the following method：Will
The reference value and detected value of source of resistance network capacitance voltage are compared, by obtaining grid-connected current after pi regulatordAxis refers to
Value, gives grid-connected currentqAxis reference value is 0, by grid-connected currentdqAfter axis reference value and detected value are compared, adjusted by PI
Device, which obtains modulating required voltage, to be givendqAxis component, then pass throughdq-αβConversion is translated into voltage on line side reference valueαβPoint
Amount.
10. the source of resistance high-speed engine two-stage boosting grid-connected system according to claim 5 based on VIENNA rectifier
Control method, it is characterised in that pusher side is controlled by controller 1, net side is controlled by controller 2, from
And realize two-stage boost function.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004848A (en) * | 2018-07-20 | 2018-12-14 | 重庆大学 | Tetra- level rectifier of Vienna |
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| CN110212816A (en) * | 2019-06-13 | 2019-09-06 | 河北工业大学 | Double PWM driving control system for electric machine based on the two-way quasi- source Z |
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