CN106685252A - Three-phase and four-arm inverter control method and system based on virtual synchronizer - Google Patents
Three-phase and four-arm inverter control method and system based on virtual synchronizer Download PDFInfo
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- CN106685252A CN106685252A CN201710119603.7A CN201710119603A CN106685252A CN 106685252 A CN106685252 A CN 106685252A CN 201710119603 A CN201710119603 A CN 201710119603A CN 106685252 A CN106685252 A CN 106685252A
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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
- H02M7/42—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
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a three-phase and four-arm inverter control method and system based on a virtual synchronizer. The three-phase and four-arm inverter control method comprises the following steps: firstly, rapidly decomposing asymmetric vectors of three phases into components of symmetrical positive sequence, negative sequence and zero sequence through a sequencing method based on an order-reducing resonator so as to avoid influences of harmonic components on a control circuit; calculating according to voltage and current components of the separated positive sequence, negative sequence and zero sequence, so as to obtain positive sequence reference voltage, negative sequence reference voltage and zero sequence reference voltage; and adding the positive sequence reference voltage, the negative sequence reference voltage and the zero sequence reference voltage together and inputting a three-dimensional space vector based on an abc coordinate system and demodulating, so as to generate a pulse signal for controlling a three-phase and four-bridge arm inversion. According to the three-phase and four-arm inverter control method, independent control of the positive sequence, the negative sequence and the zero sequence can be realized; meanwhile, the influences caused by the negative sequence component, the zero sequence component and the harmonic components of output voltage of the inverter are inhibited and eliminated; the three-phase and four-arm inverter control method has a very good control property under unbalanced and non-linear load conditions; and properties of a synchronous generator are simulated and an accepting capability of a power grid on a distributed power supply is improved.
Description
Technical field
The invention belongs to electric power network technique field, with being related to a kind of three-phase four-arm inverter control based on virtual synchronous machine
Method and system.
Background technology
With the application of the development of Power Electronic Technique, various nonlinear loads and unbalanced load it is more and more universal, often
It is required that inverter has the ability with unbalanced load or nonlinear load.In order to such load supplying, frequently with method
It is between conventional three-phase inverter and load plus a Δ/Y transformator, so that this power volume is larger, it is relatively costly；
Another kind of scheme is that using split capacitor formula three-phase inversion topological, three-phase inverter is equivalent to 3 independent single-phase semi-bridges, control compared with
Simply, but exist low DC voltage utilization rate, DC bus capacitor short life, need to separate capacitance voltage be balanced control etc.
Shortcoming.Three-phase four-arm topology is to study a kind of wide inversion topological structure in recent years, and its direct centering electric current enters
Row control, it is flexible with control, without the need for big DC capacitor and DC voltage, the advantages of utilization rate is high.
However, three-phase four-leg inverter control is complicated, at present conventional control method has current hysteresis-band control, neutral point
Control, the control of positive sequence negative phase-sequence zero sequence, PI controls, particular harmonic method of elimination, inner membrance control methods and fuzzy control etc..These controlling parties
Method solves the problems, such as with three-phase imbalance load in certain degree, but the current harmonic content with output loading it is big and
The control of three-phase output voltage degree of balance is slow, do not have external characteristics similar to synchronous generator, it is not possible to realize active power and
Reactive power is automatically adjusted, and these three-phase four-line dc-to-ac converters controls are complicated and realize difficult.
The content of the invention
The technical problem to be solved is to provide a kind of three-phase four-arm inverter control based on virtual synchronous machine
Method and system, have the energy with unbalanced load or nonlinear load using the three-phase four-leg inverter of the control method
Power, and with the external characteristics similar to synchronous generator, active power and reactive power can be automatically adjusted.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
On the one hand, the invention provides a kind of three-phase four-arm inverter control system based on virtual synchronous machine, the system
System includes：
Phase sequence separation module, the three-phase for three-phase four-arm inverter to be exported using positive-negative sequence separation method is not right
Claim voltage and current resolution of vectors into the voltage and current component of positive sequence, negative phase-sequence and zero sequence；
Reference voltage computing module, for according to the voltage and current component of positive sequence, negative phase-sequence and the zero sequence separated
It is calculated positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage；
Pulse signal generation module, for by the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage
After being added and being modulated, the pulse signal of control three-phase four-arm inversion is produced.
Further, the phase sequence separation module specifically for：Using the positive-negative sequence separation method handle based on depression of order resonator
Voltage of the asymmetrical three-phase voltage and current resolution of vectors of three-phase four-arm inverter output into positive sequence, negative phase-sequence and zero sequence
And current component.
Further, the reference voltage computing module specifically includes zero sequence controller, negative phase-sequence controller, positive sequence control mould
Block；
The positive sequence control module, including instantaneous power computing controller, VSG controllers and positive sequence controller, are used for
The positive sequence voltage signal separated and negative sequence current signal are calculated using virtual synchronous generator control algorithm, is obtained
Positive sequence reference voltage；
The negative phase-sequence controller, for negative to what is separated using the closed loop control algorithm under double synchronous rotating frames
Sequence voltage signal and negative sequence current signal are calculated, and obtain negative phase-sequence reference voltage；
The zero sequence controller, for using quasi- ratio resonant regulator to the residual voltage signal separated and zero sequence
Current signal is calculated, and obtains zero sequence reference voltage.
Further, the pulse signal generation module specifically includes the changer and 3D-SVPWM controllers of dq0/abc；
The changer of the dq0/abc, for the reference of the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence is electric
Voltage signal after pressure is added is three-phase abc states from the dq0 state transformations of d axle q axles, and will be delivered to the 3D-SVPWM
Controller；
The 3D-SVPWM controllers, the three-phase voltage signal for being conveyed according to the changer of the dq0/abc is produced
The pulse signal of control three-phase four-arm inversion.
On the other hand, there is provided a kind of three-phase four-arm inverter control method based on virtual synchronous machine, methods described includes：
S1, three-phase four-arm inverter is exported asymmetrical three-phase voltage and current using positive-negative sequence separation method are sweared
Amount resolves into the voltage and current component of positive sequence, negative phase-sequence and zero sequence；
The voltage and current component of positive sequence, negative phase-sequence and zero sequence that S2, basis are separated is calculated positive sequence with reference to electricity
Pressure, negative phase-sequence reference voltage and zero sequence reference voltage；
S3, the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage are added and are modulated after, produce
The pulse signal of raw control three-phase four-arm inversion.
Further, the S1 is specifically included：Using the positive-negative sequence separation method based on depression of order resonator three-phase four-arm
Voltage and current point of the asymmetrical three-phase voltage and current resolution of vectors of inverter output into positive sequence, negative phase-sequence and zero sequence
Amount.
Further, the S2 is specifically included：Using virtual synchronous generator control algorithm to the positive sequence voltage separated
Signal and negative sequence current signal are calculated, and obtain positive sequence reference voltage；
Using the closed loop control algorithm under double synchronous rotating frames to the negative sequence voltage signal separated and negative phase-sequence electricity
Stream signal is calculated, and obtains negative phase-sequence reference voltage；
The residual voltage signal separated and zero sequence current signal are calculated using quasi- ratio resonant regulator, is obtained
To zero sequence reference voltage.
Further, the S3 is specifically included：By the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage
Phase adduction is input into after being processed based on the three-dimensional space vector modulation under abc coordinate systems, produces control three-phase four-arm inverse
The pulse signal of change.
Beneficial effects of the present invention：A kind of three-phase four-arm inverter control side based on virtual synchronous machine that the present invention is provided
Method and system, have band using the three-phase four-leg inverter of the three-phase four-leg inverter control method based on virtual synchronous machine
Unbalanced load or the ability of nonlinear load, by the way that positive sequence voltage, electric current are substituted into into virtual synchronous generator control algorithm, make
Three-phase four-leg inverter has the external characteristics similar to synchronous generator, can be to active power and the automatic tune of reactive power
Section；Negative sequence voltage, current signal can effectively suppress negative phase-sequence electricity by the closed loop control algorithm under double synchronous rotating frames
The two times of fundamental frequencies pulsation produced under positive sequence synchronous rotating frame is pressed in, by the two close cycles control based on quasi- ratio resonant regulator
System simplifies zero axle control, and the residual voltage pulsed with fundamental frequency is suppressed.
Description of the drawings
Fig. 1 is a kind of three-phase four-arm inverter control method flow chart based on virtual synchronous machine；
Fig. 2 is based on the three-phase four-leg inverter control block diagram of virtual synchronous machine；
Fig. 3 is based on the positive-negative sequence separation method of depression of order resonance；
Fig. 4 is virtual synchronous generator control algorithm；
Fig. 5 is positive-negative sequence control block diagram；
Fig. 6 is zero sequence control block diagram.
Specific embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
Embodiment 1, a kind of three-phase four-arm inverter control method based on virtual synchronous machine.With reference to Fig. 1 to Fig. 6 pair
The method that the present embodiment is provided is described in detail.
Referring to Fig. 1 to Fig. 6, the present invention adopts the three-phase based on the three-phase four-leg inverter control method of virtual synchronous machine
Four-leg inverter has the ability with unbalanced load or nonlinear load.A kind of three-phase four-arm based on virtual synchronous machine is inverse
Become device control method, methods described includes：S1, three-phase four-arm inverter is exported three-phase using positive-negative sequence separation method
Asymmetrical voltage and current phasor resolve into the voltage and current component of positive sequence, negative phase-sequence and zero sequence.
Specifically, using three-phase four-arm inverter is exported based on the positive-negative sequence separation method of depression of order resonator three
Phase asymmetrical voltage and current phasor resolve into the voltage and current component of positive sequence, negative phase-sequence and zero sequence.
Specifically, depression of order resonator only one of which limit, is capable of achieving to the positive sequence under characteristic frequency or negative sequence component list
Solely control, computing is simple, it is easy to which Digital Realization, its transmission function is as follows：
To improve the extraction rate of positive and negative order components, operand is reduced, separated using the positive-negative sequence based on depression of order resonator
Method, its control block diagram is as shown in Figure 3.In figure, ωoFor fundamental frequency (50Hz), uαβFor feedback voltage, subscript ± correspond to respectively
Positive sequence and negative sequence component, coefficient k is used to adjust separating rate.U can be obtained by figureαβ +、uαβ -Respectively with uαβBetween transmission function close
Shown in system, such as following formula (2)：
The characteristics of the method using ROR there is frequency polarity to select, when extracting positive-sequence component, is presented band logical special at 50Hz
Property, while trap characteristic is presented at -50Hz, therefore positive-sequence component can be accurately obtained.When negative sequence component is extracted, also have
There is identical characteristic, bandpass characteristics is presented at -50Hz, trap characteristic is presented at 50Hz.As can be seen that the method is without the need for right
Input signal postpones 90 °, accelerates positive-negative sequence separating rate, and the amplitude at harmonic frequency is intended to -50dB, preferably suppression
The impact of harmonic wave during fundamental wave phase sequence is separated is made.
It can be seen that, the positive-negative sequence separation method for being based on ROR is adopted, without the need for constructing extra parameter and phase shift operation, directly
The positive sequence of voltage x current is separated with negative sequence component, realizes simply, effectively reducing computing.
The voltage and current component of positive sequence, negative phase-sequence and zero sequence that S2, basis are separated is calculated positive sequence with reference to electricity
Pressure, negative phase-sequence reference voltage and zero sequence reference voltage.
The positive sequence voltage signal separated and negative sequence current signal are carried out using virtual synchronous generator control algorithm
Calculate, obtain positive sequence reference voltage.It is electric to the negative phase-sequence separated using the closed loop control algorithm under double synchronous rotating frames
Pressure signal and negative sequence current signal are calculated, and obtain negative phase-sequence reference voltage.Using quasi- ratio resonant regulator to separating
Residual voltage signal and zero sequence current signal calculated, obtain zero sequence reference voltage.
Specifically, the virtual synchronous generator control algorithm, has used for reference the second order Classical Equation and tune of synchronous generator
Fast device and excitation controller, devise VSG control algolithms, and its math equation is as follows：
In above formula：Tset、TeFor given torque and electromagnetic torque；Pset、QsetGive for active and reactive power；Dp、DqFor
Active-frequency and the sagging coefficient of idle-voltage；θ is electrical angle；Δ ω is poor for angular rate, Δ ω=ωn-ω；ωn, ω be
Specified angular rate and actual angular rate；Δ u is poor for output voltage, Δ u=un-uo；un、uoFor rated voltage virtual value and
Output voltage virtual value；J is rotary inertia；K is inertia coeffeicent；Wherein, the instantaneous electromagnetic power P of synchronous inverter outputeAnd Qe
Can be obtained by following formula：
Because positive sequence voltage vector negative sequence voltage vector is rotated in opposite directions respectively with angular frequency and-ω, if will
Negative sequence voltage is converted under positive sequence rotating coordinate system, then with 2 ω pulsation exist, therefore using the control strategy of Fig. 5, pi regulator
Negative sequence voltage components cannot effectively be controlled.If setting up synchronously rotating reference frame respectively along positive sequence voltage and negative sequence voltage
System, then positive sequence voltage and negative sequence voltage will become DC quantity under respective synchronous rotating frame.
Governing equation under positive sequence and negative phase-sequence coordinate system is respectively such as formula (7) and formula (8)：
When laod unbalance, residual voltage is presented the pulsation of fundamental frequency with current component, and actuator is usually used in directly
The zero steady state error control of stream reference quantity and feedback quantity, its rejection ability to AC compounent is limited, and can bring amplitude and phase place
Error.Therefore, the actuator used in zero axle actuator can not well suppress residual voltage, although by scaling up ring
Energy-conservation enough reduces error, but proportionality coefficient is excessive easily to cause the unstable of system.For this purpose, using quasi- ratio resonant regulator
Zero-sequence component is controlled, its transmission function is：
Similar with positive and negative order components control structure, zero axle controls same Bian load voltage outer shrouds with inductive current internal ring
Control strategy, voltage adopts quasi- actuator with current control, and its control block diagram is as shown in figure 5, adoption rate resonant regulator
Zero axle control structure obtained significant simplification, without the need for coordinate transform, and reduce the quantity of controller.
S3, the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage are added and are modulated after, produce
The pulse signal of raw control three-phase four-arm inversion.
Specifically, the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage phase adduction are input into base
After three-dimensional space vector modulation under abc coordinate systems is processed, the pulse signal of control three-phase four-arm inversion is produced.
By the way that positive sequence voltage, electric current are substituted into into virtual synchronous generator control algorithm, there is three-phase four-leg inverter
Similar to the external characteristics of synchronous generator, active power and reactive power can be automatically adjusted；Negative sequence voltage, current signal
By the closed loop control algorithm under double synchronous rotating frames, can effectively suppress negative sequence voltage in positive sequence synchronously rotating reference frame
The two times of fundamental frequencies pulsation produced under system, simplifies zero axle and controls by the double-closed-loop control based on quasi- ratio resonant regulator, and with
The residual voltage of fundamental frequency pulsation is suppressed.
Embodiment 2, a kind of three-phase four-arm inverter control system based on virtual synchronous machine.With reference to Fig. 2 to Fig. 6 pair
The system that the present embodiment is provided is described in detail.
Referring to Fig. 2 to Fig. 6, a kind of three-phase four-arm inverter control system based on virtual synchronous machine, it is characterised in that institute
The system of stating includes：Phase sequence separation module, reference voltage computing module and pulse signal generation module.
Phase sequence separation module, the three-phase for three-phase four-arm inverter to be exported using positive-negative sequence separation method is not right
Claim voltage and current resolution of vectors into the voltage and current component of positive sequence, negative phase-sequence and zero sequence.
Specifically, the phase sequence separation module specifically for：Using the positive-negative sequence separation method handle based on depression of order resonator
Voltage of the asymmetrical three-phase voltage and current resolution of vectors of three-phase four-arm inverter output into positive sequence, negative phase-sequence and zero sequence
And current component.
Reference voltage computing module, for according to the voltage and current component of positive sequence, negative phase-sequence and the zero sequence separated
It is calculated positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage.
Specifically, the reference voltage computing module specifically includes zero sequence controller, negative phase-sequence controller, positive sequence control mould
Block.
The positive sequence control module, including instantaneous power computing controller, VSG controllers and positive sequence controller, are used for
The positive sequence voltage signal separated and negative sequence current signal are calculated using virtual synchronous generator control algorithm, is obtained
Positive sequence reference voltage.
The negative phase-sequence controller, for negative to what is separated using the closed loop control algorithm under double synchronous rotating frames
Sequence voltage signal and negative sequence current signal are calculated, and obtain negative phase-sequence reference voltage.
The zero sequence controller, for using quasi- ratio resonant regulator to the residual voltage signal separated and zero sequence
Current signal is calculated, and obtains zero sequence reference voltage.
Pulse signal generation module, for by the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage
After being added and being modulated, the pulse signal of control three-phase four-arm inversion is produced.
Specifically, the pulse signal generation module specifically includes the changer and 3D-SVPWM controllers of dq0/abc.
The changer of the dq0/abc, for the reference of the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence is electric
Voltage signal after pressure is added is three-phase abc states from the dq0 state transformations of d axle q axles, and will be delivered to the 3D-SVPWM
Controller.
The 3D-SVPWM controllers, the three-phase voltage signal for being conveyed according to the changer of the dq0/abc is produced
The pulse signal of control three-phase four-arm inversion.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (7)
1. a kind of three-phase four-arm inverter control system based on virtual synchronous machine, including three-phase four-arm inverter, its feature exists
In the system also includes：
Phase sequence separation module, for three-phase four-arm inverter is exported asymmetrical three-phase electricity using positive-negative sequence separation method
Pressure and current phasor resolve into the voltage and current component of positive sequence, negative phase-sequence and zero sequence；
Reference voltage computing module, for being calculated according to the voltage and current component of positive sequence, negative phase-sequence and the zero sequence separated
Obtain positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage；
Pulse signal generation module, for the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage to be added
And after being modulated, produce the pulse signal of control three-phase four-arm inversion.
2. a kind of three-phase four-arm inverter control system based on virtual synchronous machine as claimed in claim 1, it is characterised in that
The reference voltage computing module specifically includes zero sequence controller, negative phase-sequence controller, positive sequence control module；
The positive sequence control module, including instantaneous power computing controller, VSG controllers and positive sequence controller, for adopting
Virtual synchronous generator control algorithm is calculated the positive sequence voltage signal separated and negative sequence current signal, obtains positive sequence
Reference voltage；
The positive sequence controller, VSG controllers are exported positive sequence using the closed loop control algorithm under double synchronous rotating frames
Voltage signal and forward-order current signal are calculated, and obtain positive sequence reference voltage；
The negative phase-sequence controller, is believed the negative sequence voltage separated using the closed loop control algorithm under double synchronous rotating frames
Number and negative sequence current signal calculated, obtain negative phase-sequence reference voltage；
The zero sequence controller, using quasi- ratio resonant regulator to the residual voltage signal separated and zero sequence current signal
Calculated, obtained zero sequence reference voltage.
3. a kind of three-phase four-arm inverter control system based on virtual synchronous machine as claimed in claim 2, it is characterised in that
The pulse signal generation module specifically includes the changer and 3D-SVPWM controllers of dq0/abc；
The changer of the dq0/abc, for by the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage phase
Plus voltage signal afterwards is three-phase abc states from the dq0 state transformations of d axle q axles, and the 3D-SVPWM controls will be delivered to
Device；
The 3D-SVPWM controllers, the three-phase voltage signal for being conveyed according to the changer of the dq0/abc produces control
The pulse signal of three-phase four-arm inversion.
4. a kind of three-phase four-arm inverter control method based on virtual synchronous machine, it is characterised in that methods described includes：
S1, three-phase four-arm inverter is exported asymmetrical three-phase voltage and current vector point using positive-negative sequence separation method
Voltage and current component of the solution into positive sequence, negative phase-sequence and zero sequence；
The voltage and current component of positive sequence, negative phase-sequence and zero sequence that S2, basis are separated is calculated positive sequence reference voltage, bears
Sequence reference voltage and zero sequence reference voltage；
S3, the positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage are added and are modulated after, produce control
The pulse signal of three-phase four-arm inversion processed.
5. a kind of three-phase four-arm inverter control method based on virtual synchronous machine as claimed in claim 4, it is characterised in that
The S1 is specifically included：
Using three-phase four-arm inverter is exported asymmetrical three-phase electricity based on the positive-negative sequence separation method of depression of order resonator
Pressure and current phasor resolve into the voltage and current component of positive sequence, negative phase-sequence and zero sequence.
6. a kind of three-phase four-arm inverter control method based on virtual synchronous machine as claimed in claim 4, it is characterised in that
The S2 is specifically included：
The positive sequence voltage signal separated and negative sequence current signal are calculated using virtual synchronous generator control algorithm,
Obtain positive sequence reference voltage；
Using the closed loop control algorithm under double synchronous rotating frames to the negative sequence voltage signal separated and negative-sequence current letter
Number calculated, obtained negative phase-sequence reference voltage；
The residual voltage signal separated and zero sequence current signal are calculated using quasi- ratio resonant regulator, obtains zero
Sequence reference voltage.
7. a kind of three-phase four-arm inverter control method based on virtual synchronous machine as claimed in claim 4, it is characterised in that
The S3 is specifically included：
The positive sequence reference voltage, negative phase-sequence reference voltage and zero sequence reference voltage phase adduction are input into based on abc coordinate systems
Under three-dimensional space vector modulation processed after, produce control three-phase four-arm inversion pulse signal.
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| CN107171346A (en) * | 2017-06-14 | 2017-09-15 | 上海电力学院 | Unbalance voltage control method based on virtual synchronous generator |
| CN107733273A (en) * | 2017-08-31 | 2018-02-23 | 江苏大学 | Based on the control method and system for dividing the three-phase four-leg inverter of sequence and virtual synchronous generator complex controll |
| CN109193707A (en) * | 2018-08-17 | 2019-01-11 | 江苏大学 | Negative sequence voltage compensation double loop control and system based on virtual synchronous generator |
| CN110417051A (en) * | 2019-07-26 | 2019-11-05 | 浙江大学 | The failure tolerant method of photovoltaic module in a kind of photovoltaic system |
| CN111371106A (en) * | 2020-04-07 | 2020-07-03 | 东南大学 | Phase-locked loop based three-phase four-leg inverter control system and control method |
| CN112968452A (en) * | 2021-03-24 | 2021-06-15 | 广州智光电气股份有限公司 | Control method and device of converter |
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| CN111371106B (en) * | 2020-04-07 | 2021-07-27 | 东南大学 | Phase-locked loop based three-phase four-leg inverter control system and control method |
| CN111371106A (en) * | 2020-04-07 | 2020-07-03 | 东南大学 | Phase-locked loop based three-phase four-leg inverter control system and control method |
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| CN114336752B (en) * | 2022-01-05 | 2023-08-18 | 东南大学 | Depth adjusting method and device for distributed photovoltaic inverter |
| CN114362634A (en) * | 2022-01-20 | 2022-04-15 | 华中科技大学 | Open-winding linear motor control device and open-winding linear motor control method |
| CN114362634B (en) * | 2022-01-20 | 2023-11-14 | 华中科技大学 | Open winding linear motor control device and open winding linear motor control method |
| WO2023066407A1 (en) * | 2022-05-26 | 2023-04-27 | 中车青岛四方车辆研究所有限公司 | Method and apparatus for controlling three-phase four-bridge-arm auxiliary converter |
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