CN108599607A - A kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection - Google Patents
A kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection Download PDFInfo
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- CN108599607A CN108599607A CN201810372930.8A CN201810372930A CN108599607A CN 108599607 A CN108599607 A CN 108599607A CN 201810372930 A CN201810372930 A CN 201810372930A CN 108599607 A CN108599607 A CN 108599607A
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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
- H02M7/493—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 the static converters being arranged for operation in parallel
-
- 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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
Abstract
The technical solution adopted in the present invention is a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection, and according to the operating status of main inverter, two kinds of methods of operation are contained from inverter, specific as follows：When main inverter normal operation, fault detect switch S is beaten to 0 gear, main inverter uses voltage and current double -loop control, ensure that voltage effective value is constant on output ac bus, ensure the neutral-point potential balance of master and slave inverter simultaneously, at this time from the inhibition of zero sequence circulation between the power-sharing and parallel connection that inverter working operating mode ensures two inverters；When main inverter failure excision, fault detect switch S is beaten to 1 gear, at this time can isolated operation, guarantee system uninterrupted power supply and its neutral-point potential balance from inverter switchover operation mode.Present system working operating mode is clear, and inverter output voltage is more stable, and response speed is faster.
Description
Technical field
The invention belongs to inverter parallel operation technical fields, are related to a kind of principal and subordinate of T-type three-level inverter parallel connection
Redundancy control method.
Background technology
Due to the limitation of switching tube current stress, the capacity of separate unit inverter is limited, cannot be satisfied high-power
The requirement of application scenario.It is inverse for high-power applications occasion such as air-conditioning system, underground railway track traffic, distributed generation system etc.
Variable power source parallel connection will be as the mainstream device of energy conversion.Master-slave control method principle phase in common inverter Parallel Control
To simple, easily realize and stream effect is good, but its dependable with function is not high, it is difficult to really realize dynamic redundancy.
And existing principal and subordinate's Redundant Control, though the reliability of system can be improved, the control circuit of principal and subordinate's inverter switching
It is complex, thereby increases and it is possible to output voltage to be caused to fluctuate, influence the normal operation of system.
Invention content
The object of the present invention is to provide a kind of principal and subordinate's redundancy control methods of T-type three-level inverter parallel connection, solve master
The problem of control circuit switched from inverter can cause output voltage to fluctuate.
The technical solution adopted in the present invention is a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection, root
According to the operating status of main inverter, two kinds of methods of operation are contained from inverter, it is specific as follows：
When main inverter normal operation, fault detect switch S is beaten to 0 gear, at this time from the specific of invertor operation mode
Step：
Step 1, main inverter is by the output reference current i of its voltage regulatordref、iqrefIt is sent to by serial communication
From inverter, received from inverter and as the given of electric current loop；
Step 2, the three pole reactor electric current i exported from inverter is acquiredLa2、iLb2、iLc2, convert to obtain i through abc/dqLd2、
iLq2, the feedback as electric current loop；
Step 3, by the current reference value idref、iqrefWith inductor current feedback signal iLd2、iLq2It is poor to make, and by electricity
Throttle regulator processing, obtains udr、uqr, convert to obtain three-phase sinusoidal signal u through dq/abcar、ubr、ucr；
Step 4, the three-phase current i exported from inverter is acquireda2、ib2、ic2, it is added and obtains zero sequence circulation iz, with 0 and izMake
Difference, and handled through conventional quasi- ratio resonant regulator, obtain zero sequence circulation injection component uz, by uzBelieve respectively with three phase sine
Number uar、ubr、ucrIt is added, obtains final from inverter three-phase modulations signal ua、ub、uc；
Step 5, three-phase modulations signal ua、ub、ucIt drives from inverter and transports through driving circuit again after SPWM modulation modules
Turn；
When main inverter failure excision, fault detect switch S is beaten to 1 gear, at this time from invertor operation mode
Specific steps：
Step 1, acquisition threephase load voltage uga、ugb、ugcAnd the three pole reactor current signal i exported from inverterLa2、
iLb2、iLc2, convert to obtain u through abc/dqgd、ugqAnd iLd2、iLq2Respectively as Voltage loop and the feedback of electric current loop；
Step 2, by the given value u of outer voltagedref、uqrefWith voltage feedback value ugd、ugqIt is poor to make, and obtains Δ ude、Δ
uqe, and handled through self-adjusting proportional and integral controller, obtain idref′、iqref', the Setting signal as electric current loop；
Step 3, by given value of current signal idref′、iqref' and current feedback signal iLd2、iLq2It is poor to make, and through overcurrent tune
Device processing is saved, u is obtaineddr、uqr, convert to obtain three-phase sinusoidal signal u through dq/abcar、ubr、ucr；
Step 4, two capacitance C up and down are acquired21、C22The voltage at both ends simultaneously makees difference, obtains the potential difference Δ from inverter midpoint
uO, by 0 and Δ uOIt is poor to make, and is handled through conventional proportional and integral controller, obtains neutral-point-potential balance control output component uO,
By neutral-point-potential balance control output component uORespectively with three-phase sinusoidal signal uar、ubr、ucrIt is added, obtains final modulation letter
Number ua、ub、uc；
Step 5, last three-phase modulations signal ua、ub、ucIt is driven again from inversion through driving circuit after SPWM modulation modules
Device operates.
The features of the present invention also characterized in that
When main inverter failure excision, the operation of main inverter can be automatically switched into operating procedure 2 from inverter
Pattern, and use self-adjusting proportional integration from contravarianter voltage outer shroud and adjust.
Main inverter uses voltage and current double -loop control.
When main inverter failure excision, the slave inverter of the isolated operation from invertor operation mode step 4 is added
Ensure the neutral-point potential balance module for stablizing output of separate unit T-type three-level inverter.
In step 3 when main inverter normal operation and when main inverter failure, current regulator is that conventional ratio is accumulated
Divide one kind in adjuster, predicted current adjuster or dead beat adjuster.
When main inverter failure excision, fault detect switch S is beaten to 1 gear, is walked from the method for operation of inverter
Rapid 2 are specially：
Step 2.1, the given value u of outer voltage is soughtdref、uqref；
Step 2.2, by voltage given value udref、uqrefWith the output voltage value of feedback u of acquisitiongd、ugqIt is poor to make, and obtains voltage
Poor Δ ude、Δuqe；
Step 2.3, voltage difference delta ude、ΔuqeIt is handled through self-adjusting proportional and integral controller, obtains idref′、iqref', make
For the Setting signal of electric current loop.
Outer voltage is using self-adjusting proportional and integral controller processing voltage difference delta u in step 2.3de、ΔuqeSpecific side
Method is：
A, when the main inverter excision moment inverter output voltage that breaks down can occur seriously to fall, i.e. voltage difference at this time
ΔudeOr Δ uqeIt is larger, Δ u need to be compared in real timede、ΔuqeWith Δ uemaxSize carry out self-adjusting proportion integral modulus；Wherein, Δ
uemaxThe upper limit value fallen is allowed to be maximum voltage difference for output voltage, as the 0.5% of given voltage amplitude；
Enable Δ ue=max (Δ ude,Δuqe), then the expression formula of self-adjusting proportional and integral controller is：
Wherein,
kP、kIFor stable operation when Voltage loop proportion integral modulus, k1、k2For constant；
With Δ ueWith Δ uemaxThe increase of difference, the proportionality coefficient of Voltage loop can increase therewith, integral coefficient can subtract therewith
It is small, to improve system response time, ensure the output voltage quality of inverter；
B, and then the available i changed with proportion integral modulus self-adjustingdref′、iqref' given the letter as electric current loop
Number：
The invention has the advantages that being directed to two T-type tri-level inversion power supply host-slave parallel systems, give from inversion
Two kinds of methods of operation of device, to ensure the uninterrupted power supply of system.It can be by detecting the failure of main inverter in real time from inverter
Signal, to determine whether switching its method of operation.When main inverter does not break down, retain the characteristic of traditional master ＆ slave control,
At this time from the inhibition of zero sequence circulation between the power-sharing and parallel connection that the method for operation of inverter can guarantee two inverters；Once
Main inverter breaks down, and from inverter meeting switchover operation mode, is changed to voltage and current double closed-loop by single electric current ring cutting and runs mould
Formula ensures stable output voltage, and takes into account the function of balance midpoint potential, realizes the ability of inverter uninterrupted power supply.Together
When fall in the range of requiring in failure removal moment inverter output voltage in order to ensure main inverter, reach quick flat sliding cutting
It changes, self-adjusting proportional plus integral control is used from contravarianter voltage outer shroud, even if to ensure inverter parallel system main inverter
Failure can also provide for load stablizes continual power supply.With boundless market application prospect.
Description of the drawings
Fig. 1 is that a kind of two three level of T-type of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection of the present invention are inverse
The electrical block diagram of variable power source parallel connection；
Fig. 2 is a kind of two kind fortune of the principal and subordinate's redundancy control method of T-type three-level inverter parallel connection of the present invention from inverter
The control principle block diagram that line mode mutually switches；
Fig. 3 is in a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection of the present invention from second of inverter
The specific workflow figure of Voltage loop self-adjusting proportion integral modulus under the method for operation.
Specific implementation mode
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The present invention is a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection, two T-types, three electricity relied on
Flat inverter parallel connection topological structure, as shown in Figure 1, include a DC power supply, DC power supply by inverter, filter with
And public exchange busbar is incorporated to after transmission line, it then powers to the load from public exchange busbar, load can be perception, hold
It is property, resistive or non-linear.
Main inverter uses voltage and current double -loop control in the present invention, ensures that voltage effective value is permanent on output ac bus
It is fixed, while ensureing the neutral-point potential balance of master and slave inverter.And include two kinds of methods of operation from inverter, by detecting in real time
The fault-signal of main inverter, to determine whether switching its method of operation.The specific control block diagram of two kinds of methods of operation switching is such as
Shown in Fig. 2, when main inverter normal operation, fault detect switch S is beaten to 0 gear, at this time from the operation side that inverter works
Formula ensures the inhibition of zero sequence circulation between the power-sharing and parallel connection of two inverters；When main inverter, which breaks down, to be cut off,
Fault detect switch S is beaten to 1 gear, at this time from inverter switchover operation mode, can isolated operation, ensure system uninterrupted power supply
And its neutral-point potential balance, and stable load voltage can be provided.According to the operating status of main inverter, from two kinds of inverter
The method of operation is as follows：
When main inverter normal operation, fault detect switch S is beaten to 0 gear, at this time from the specific of invertor operation mode
Step：
Step 1, main inverter is by the output reference current i of its voltage regulatordref、iqrefIt is sent to by serial communication
From inverter, received from inverter and as the given of electric current loop；
Step 2, the three pole reactor electric current i exported from inverter is acquiredLa2、iLb2、iLc2, convert to obtain i through abc/dqLd2、
iLq2, the feedback as electric current loop；
Step 3, by the current reference value idref、iqrefWith inductor current feedback signal iLd2、iLq2It is poor to make, and by electricity
Throttle regulator processing, obtains udr、uqr, convert to obtain three-phase sinusoidal signal u through dq/abcar、ubr、ucr；
Step 4, the three-phase current i exported from inverter is acquireda2、ib2、ic2, it is added and obtains zero sequence circulation iz, with 0 and izMake
Difference, and handled through conventional quasi- ratio resonant regulator, obtain zero sequence circulation injection component uz, by uzBelieve respectively with three phase sine
Number uar、ubr、ucrIt is added, obtains final from inverter three-phase modulations signal ua、ub、uc；
Step 5, three-phase modulations signal ua、ub、ucIt drives from inverter and transports through driving circuit again after SPWM modulation modules
Turn.
When main inverter failure excision, fault detect switch S is beaten to 1 gear, at this time from invertor operation mode
Specific steps：
Step 1, acquisition threephase load voltage uga、ugb、ugcAnd the three pole reactor current signal i exported from inverterLa2、
iLb2、iLc2, convert to obtain u through abc/dqgd、ugqAnd iLd2、iLq2Respectively as Voltage loop and the feedback of electric current loop；
Step 2, by the given value u of outer voltagedref、uqrefWith voltage feedback value ugd、ugqIt is poor to make, and obtains Δ ude、Δ
uqe, and handled through self-adjusting proportional and integral controller as shown in Figure 3, obtain idref′、iqref', the given letter as electric current loop
Number；
Step 2 is specially：
Step 2.1, the given value u of outer voltage is soughtdref、uqref；
Step 2.2, by voltage given value udref、uqrefWith the output voltage value of feedback u of acquisitiongd、ugqIt is poor to make, and obtains voltage
Poor Δ ude、Δuqe；
Step 2.3, voltage difference delta ude、ΔuqeIt is handled through self-adjusting proportional and integral controller, obtains idref′、iqref', make
For the Setting signal of electric current loop；
Outer voltage is using self-adjusting proportional and integral controller processing voltage difference delta u in step 2.3de、ΔuqeSpecific side
Method is：
A, when the main inverter excision moment inverter output voltage that breaks down can occur seriously to fall, i.e. voltage difference at this time
ΔudeOr Δ uqeIt is larger, Δ u need to be compared in real timede、ΔuqeWith Δ uemaxSize carry out self-adjusting proportion integral modulus.Wherein, Δ
uemaxThe upper limit value fallen is allowed to be maximum voltage difference for output voltage, as the 0.5% of given voltage amplitude.
Here Δ u is enablede=max (Δ ude,Δuqe), then the expression formula of self-adjusting proportional and integral controller is：
Wherein,
kP、kIFor stable operation when Voltage loop proportion integral modulus, k1、k2For constant.
It can be obtained by formula (1), with Δ ueWith Δ uemaxThe proportionality coefficient of the increase of difference, Voltage loop can increase, integrate therewith
Coefficient can reduce therewith, to improve system response time, ensure the output voltage quality of inverter.
B, and then the available i changed with proportion integral modulus self-adjustingdref′、iqref', as shown in formula (2), as electricity
Flow the Setting signal of ring.
Step 3, by given value of current signal idref′、iqref' and current feedback signal iLd2、iLq2It is poor to make, and through overcurrent tune
Device processing is saved, u is obtaineddr、uqr, convert to obtain three-phase sinusoidal signal u through dq/abcar、ubr、ucr；
Step 4, two capacitance C up and down are acquired21、C22The voltage at both ends simultaneously makees difference, obtains the potential difference Δ from inverter midpoint
uO, by 0 and Δ uOIt is poor to make, and is handled through conventional proportional and integral controller, obtains neutral-point-potential balance control output component uO,
By neutral-point-potential balance control output component uORespectively with three-phase sinusoidal signal uar、ubr、ucrIt is added, obtains final modulation letter
Number ua、ub、uc；
Step 5, last three-phase modulations signal ua、ub、ucIt is driven again from inversion through driving circuit after SPWM modulation modules
Device operates.
In step 3 when main inverter normal operation and when main inverter failure, current regulator is that conventional ratio is accumulated
Divide one kind in adjuster, predicted current adjuster or dead beat adjuster.
The present invention includes two kinds of methods of operation from inverter：Main inverter do not break down normal operation when from inverter
From the method for operation of inverter after the method for operation and main inverter failure excision system.Wherein, main inverter normal operation
When, fault detect switch S is beaten to 0 gear, and main inverter uses voltage and current double -loop control, ensures voltage on output ac bus
Virtual value is constant, while ensureing the neutral-point potential balance of master and slave inverter, ensures two from inverter working operating mode at this time
The inhibition of zero sequence circulation between the power-sharing and parallel connection of inverter；When main inverter failure excision, fault detect switch S
It beats to 1 gear, it, can isolated operation, guarantee system uninterrupted power supply and its midpoint potential at this time from inverter switchover operation mode
Balance, and stable load voltage can be provided.
The present invention is based on existing principal and subordinate's Redundant Controls, mainly for two T-type tri-level inversion power sources in parallel topology knots
Structure, it is proposed that it is a kind of improved from inverter voltage stabilizing control strategy, it can be achieved that when main inverter breaks down and cuts off, from inversion
Device not only has the function of isolated operation, ensures system uninterrupted power supply, and can provide stable load voltage, does not influence system
Normal operation, while also ensuring the neutral-point potential balance from inverter.
The present invention proposes a kind of improved from inverter voltage stabilizing control method, it can be achieved that when main inverter breaks down
When, its control strategy is adjusted rapidly from inverter by fault detect switch S, and switchover operation mode, guarantee can be single from inverter
Solely operation realizes uninterrupted power supply, and has basis from the voltage controller in invertor operation mode when main inverter failure
The function of load voltage ripple amplitude self-adjusting proportion integral modulus can ensure defeated from inverter in main inverter excision moment
Go out voltage to adjust to stable voltage rapidly, the load voltage of exportable stabilization, while also ensuring from the midpoint of inverter
Potential balance realizes the redundancy logic control of two T-type three-level inverter parallel connections.
Claims (7)
1. a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection, which is characterized in that according to the operation of main inverter
State contains two kinds of methods of operation from inverter, specific as follows：
When main inverter normal operation, fault detect switch S is beaten to 0 gear, at this time from the specific steps of invertor operation mode：
Step 1, main inverter is by the output reference current i of its voltage regulatordref、iqrefIt is sent to from inverse by serial communication
Become device, is received from inverter and as the given of electric current loop；
Step 2, the three pole reactor electric current i exported from inverter is acquiredLa2、iLb2、iLc2, convert to obtain i through abc/dqLd2、iLq2,
Feedback as electric current loop；
Step 3, by the current reference value idref、iqrefWith inductor current feedback signal iLd2、iLq2It is poor to make, and through overcurrent tune
Device processing is saved, u is obtaineddr、uqr, convert to obtain three-phase sinusoidal signal u through dq/abcar、ubr、ucr；
Step 4, the three-phase current i exported from inverter is acquireda2、ib2、ic2, it is added and obtains zero sequence circulation iz, with 0 and izIt is poor to make,
And handled through conventional quasi- ratio resonant regulator, obtain zero sequence circulation injection component uz, by uzRespectively with three-phase sinusoidal signal
uar、ubr、ucrIt is added, obtains final from inverter three-phase modulations signal ua、ub、uc；
Step 5, three-phase modulations signal ua、ub、ucIt is driven again from operation of inverter through driving circuit after SPWM modulation modules；
When main inverter failure excision, fault detect switch S is beaten to 1 gear, at this time from the specific of invertor operation mode
Step：
Step 1, acquisition threephase load voltage uga、ugb、ugcAnd the three pole reactor current signal i exported from inverterLa2、iLb2、
iLc2, convert to obtain u through abc/dqgd、ugqAnd iLd2、iLq2Respectively as Voltage loop and the feedback of electric current loop；
Step 2, by the given value u of outer voltagedref、uqrefWith voltage feedback value ugd、ugqIt is poor to make, and obtains Δ ude、Δuqe, and pass through
The processing of self-adjusting proportional and integral controller, obtains idref′、iqref', the Setting signal as electric current loop；
Step 3, by given value of current signal idref′、iqref' and current feedback signal iLd2、iLq2It is poor to make, and passes through current regulator
Processing, obtains udr、uqr, convert to obtain three-phase sinusoidal signal u through dq/abcar、ubr、ucr；
Step 4, two capacitance C up and down are acquired21、C22The voltage at both ends simultaneously makees difference, obtains the potential difference Δ u from inverter midpointO, will
0 and Δ uOIt is poor to make, and is handled through conventional proportional and integral controller, obtains neutral-point-potential balance control output component uO, by midpoint
Potential balance controls output component uORespectively with three-phase sinusoidal signal uar、ubr、ucrIt is added, obtains final modulated signal ua、ub、
uc；
Step 5, last three-phase modulations signal ua、ub、ucIt drives from inverter and transports through driving circuit again after SPWM modulation modules
Turn.
2. a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection according to claim 1, feature exist
When, the main inverter breaks down excision, the operation mould of main inverter can be automatically switched into operating procedure 2 from inverter
Formula, and use self-adjusting proportional integration from contravarianter voltage outer shroud and adjust.
3. a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection according to claim 1, feature exist
In the main inverter uses voltage and current double -loop control.
4. a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection according to claim 1, feature exist
In when the main inverter failure is cut off, the slave inverter of isolated operation adds from invertor operation mode step 4
Ensure the neutral-point potential balance module for stablizing output of separate unit T-type three-level inverter.
5. a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection according to claim 1, feature exist
When, the main inverter normal operation and in the step 3 when main inverter failure, current regulator is conventional proportional integration
One kind in adjuster, predicted current adjuster or dead beat adjuster.
6. a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection according to claim 1, feature exist
In when the main inverter failure is cut off, fault detect switch S is beaten to 1 gear, the step from the method for operation of inverter
2 are specially：
Step 2.1, the given value u of outer voltage is soughtdref、uqref；
Step 2.2, by voltage given value udref、uqrefWith the output voltage value of feedback u of acquisitiongd、ugqIt is poor to make, and obtains voltage difference delta
ude、Δuqe；
Step 2.3, voltage difference delta ude、ΔuqeIt is handled through self-adjusting proportional and integral controller, obtains idref′、iqref', as electricity
Flow the Setting signal of ring.
7. a kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection according to claim 6, feature exist
In outer voltage is using self-adjusting proportional and integral controller processing voltage difference delta u in the step 2.3de、ΔuqeSpecific side
Method is：
A can occur seriously to fall, i.e., voltage difference delta u at this time when main inverter failure cuts off moment inverter output voltagede
Or Δ uqeIt is larger, Δ u need to be compared in real timede、ΔuqeWith Δ uemaxSize carry out self-adjusting proportion integral modulus；Wherein, Δ uemax
The upper limit value fallen is allowed to be maximum voltage difference for output voltage, as the 0.5% of given voltage amplitude；
Enable Δ ue=max (Δ ude,Δuqe), then the expression formula of self-adjusting proportional and integral controller is：
Wherein,
kP、kIFor stable operation when Voltage loop proportion integral modulus, k1、k2For constant；
With Δ ueWith Δ uemaxThe increase of difference, the proportionality coefficient of Voltage loop can increase therewith, integral coefficient can reduce therewith,
To improve system response time, ensure the output voltage quality of inverter；
B, and then the available i changed with proportion integral modulus self-adjustingdref′、iqref' the Setting signal as electric current loop：
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Cited By (4)
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| CN110350792A (en) * | 2019-02-14 | 2019-10-18 | 国网浙江省电力有限公司 | A kind of power master-slave control method of DC transformer |
| CN112865177A (en) * | 2021-01-22 | 2021-05-28 | 西安理工大学 | Multi-target coordination control method for parallel operation of multiple inverters |
| CN112928940A (en) * | 2021-02-01 | 2021-06-08 | 合肥同智机电控制技术有限公司 | Switching control method and device for master-slave inverter parallel system |
| CN113437892A (en) * | 2021-08-09 | 2021-09-24 | 上海弘正新能源科技有限公司 | Three-level inverter for protecting direct-current bus voltage from uprush during parallel operation |
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| CN113437892A (en) * | 2021-08-09 | 2021-09-24 | 上海弘正新能源科技有限公司 | Three-level inverter for protecting direct-current bus voltage from uprush during parallel operation |
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