CN106253697B - Rectifier voltage outer ring adjustment circuit based on power dynamic Feedforward - Google Patents
Rectifier voltage outer ring adjustment circuit based on power dynamic Feedforward Download PDFInfo
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- CN106253697B CN106253697B CN201610730764.5A CN201610730764A CN106253697B CN 106253697 B CN106253697 B CN 106253697B CN 201610730764 A CN201610730764 A CN 201610730764A CN 106253697 B CN106253697 B CN 106253697B
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Rectifiers (AREA)
Abstract
Rectifier voltage outer ring adjustment circuit based on power dynamic Feedforward, including voltage error adjustment module, Capacitance Power estimation block, electric inductance power estimation block, active power command value rectification module, active power control errors module, reactive power error control module, system power control module and IGBT module.The energy variation of inductance, capacitor is dynamically introduced outer voltage controller by the present invention stage by stage.Inductance, capacitive energy are dynamically compensated on the basis of original PI structure, adjust outer voltage controller active power of output instruction value, it solves the problems, such as that conventional PI control device can not describe the flowing of mission nonlinear portion of energy, reduces the error between system output power and bearing power.In bearing power jump, it can effectively inhibit the fluctuation of DC bus-bar voltage, output power can be realized quick tracking, improve the precision of system output power.
Description
Technical field
The present invention relates to frequency converter fields, the rectifier voltage outer ring adjustment specifically based on power dynamic Feedforward
Circuit.
Background technique
In traditional ac-dc-ac frequency converter, it will usually the method to be feedovered using bearing power.Bearing power feedovers
By the power feedforward of inverter output to rectifier, realize the control in advance to rectifier output power, reach rectifier with it is inverse
Become the purpose of device coordinated control.Usually obtaining bearing power can be converted in inverter sampled voltage, current signal and with A/D
Digital quantity, the data feed-forward value rectifier voltage outer ring that obtains bearing power by operation and will obtain.Outer voltage is usually adopted
It is adjusted with PI, bearing power, which is feedovered, can quickly adjust PI control active power of output instruction value to outer voltage.But energy
Amount to load end is had to by net side filter inductance and DC bus capacitor from the rectified device of power grid outflow to inverter again.
Load absorption energy must be first absorb DC bus capacitor energy and net side filter inductance energy, then capacitor and inductor from
Power grid absorbs the energy consumption of this part of energy supplement.And capacitor, inductance are kinematic nonlinearity energy-storage travelling wave tubes, no matter fill and can or consume to it
Can all should be it is nonlinear, dynamic, therefore rectifier voltage outer ring only with PI controller by system capacity consumption, supplement
Process description is that there are errors for linear process.
Summary of the invention
For the solution process that system capacity is consumed only with PI controller, supplemented by rectifier voltage outer ring in the prior art
Being described as linear process has error, and the present invention provides a kind of rectifier voltage outer rings based on power dynamic Feedforward
Adjustment circuit to realize the problem of reducing rectifier voltage outer ring pi regulator active power of output error, and can guarantee
When electric current, the voltage jump of load needs cause power to jump, output power is capable of fast tracking and its accuracy.
The present invention to solve above-mentioned technical problem used by technical solution are as follows: based on power dynamic Feedforward rectifier electricity
Press outer ring adjustment circuit, including voltage error adjustment module, Capacitance Power estimation block, electric inductance power estimation block, wattful power
Rate instruction value rectification module, active power control errors module, reactive power error control module, system power control module and
IGBT module, wherein the voltage error adjustment module detects DC bus-bar voltage actual valueAnd after A/D is converted and directly
Flow busbar voltage instruction valueIt makes the difference, difference is delivered separately to PI controller and Capacitance Power estimation block, PI controller
Operation active power of output error amount is to active power command value rectification module；
The Capacitance Power estimation block is by received difference and DC bus-bar voltage instruction valueMultiplying is carried out,
The Capacitance Power that each cycle system need to compensate is obtained, and the Capacitance Power is inputed into active power command value rectification module；
The electric inductance power estimation block acquires current on line side d axis componentWith d axis component instruction valueIt is made the difference, and
By difference withMultiplying is carried out, obtains the electric inductance power that each cycle system need to compensate, and the electric inductance power has been inputed to
Function power command value rectification module；
The active power command value rectification module is according to by the data received and inverter output loading power
Rectifier active power of output instruction value is calculated, and willInput to active power control errors module；
The active power control errors module according toWith the rectifier active power of output value of acquisitionIt is made the difference
Operation, obtained operation result pass to a PI controller in system power control module and carry out operation, obtain rectifier
The d axis component of input voltage, and willPass to the space voltage vector control module in system power control module
SVPWM；
The reactive power error control module is according to rectifier output reactive power valueIdle function is exported with rectifier
Rate instruction valueIt carries out doing difference operation, obtained operation result passes to a PI controller in system power control module
Operation is carried out, the q axis component of rectifier input voltage is obtained, and willPass to the space in system power control module
Voltage vector control module SVPWM；
Space voltage vector control module SVPWM in the system power control module based on the received transported by data
It calculates, and exports six bridge arm power device switching signals、、、、、To IGBT module, and then control IGBT module
Export the d-c bus voltage value after Overpower compensating, and according toControl rectifier power switching device.
The concrete operations for the Capacitance Power that each cycle system need to compensate are calculated in the Capacitance Power estimation block are as follows:
D-c bus voltage value is sampled first, is filtered after circuit after testing, is removed the burr signal of interference, so
Afterwards by from the voltage signal of inspection circuit output, A/D conversion is carried out into DSP, and according to conversion value and formula
The Capacitance Power that each cycle system need to compensate is calculated；
In formula,For dc-link capacitance value,For DC bus-bar voltage instruction value,For DC bus-bar voltage reality
Actual value,For system regulating cycle number,For system communication cycle.
The concrete operations for the electric inductance power that each cycle system need to compensate are calculated in the electric inductance power estimation block are as follows:
Firstly, acquiring three-phase current component from rectification side senser, circuit, is filtered after testing, and removal is dry
The burr signal disturbed；
Secondly, will test the current signal of circuit output, A/D conversion is carried out into DSP, 3s/ is carried out after digital quantization
2r transformation, is transformed into two-phase rotational coordinates from three-phase static coordinate system and fastens；
Finally, according to electric current in two-phase rotating coordinate system d axis component value and formulaEach cycle is calculated
The electric inductance power that system need to compensate；
In formula,For net side filter inductance value,For current on line side d axis component instruction value,It is practical for current on line side d axis
Output valve,For system regulating cycle number,For system communication cycle.
The bearing powerObtain that steps are as follows:
Firstly, acquiring three-phase voltage, current component from inversion side senser, circuit, is filtered after testing, goes
Except the burr signal of interference；
Secondly, will test circuit output signal, A/D conversion is carried out into DSP；
Finally, calculating inverter output loading power according to voltage, the current value converted out,
, whereinFor inverter output line voltage,For inverter output line current,For the energy conversion factor of system, take
0.8。
The present invention dynamically compensates the energy consumption of capacitor, inductance in outer voltage PI controller stage by stage, according to direct current mother
The capacitive energy that the difference determination of line voltage real output value and instruction value need to supplement, according to current on line side output valve and instruction value
Difference determination need to supplement the energy of inductance, and capacitor, inductance dynamic compensation cycle n are determined according to pi regulator regulating cycle
Value, to reduce the error of outer voltage pi regulator active power of output.
The utility model has the advantages that conventional rectifier outer voltage generallys use PI controller, the adjusting of outer voltage voltage is considered as line
Property, static system.But practical ac-dc-ac transform device energy flow process is due to having passed through net side inductance and DC bus capacitor
There are non-linear, dynamic components, so going control containing non-linear, dynamic with linear, static controller using traditional PI outer ring
There are error, the active power command values of PI controller output can only embody bearing power variation for the system of component, still
The variation of inductance, capacitor storage energy in system capacity flow process is not accounted for.And the present invention is by inductance, the energy of capacitor
Variation dynamically introduces outer voltage controller stage by stage.Inductance, capacitive energy are dynamically compensated on the basis of original PI structure,
Outer voltage controller active power of output instruction value is adjusted, mission nonlinear part can not be described by solving conventional PI control device
The problem of energy flow, reduces the error between system output power and bearing power.In bearing power jump, Neng Gouyou
Effect inhibits the fluctuation of DC bus-bar voltage, and output power can be realized quick tracking, improve the precision of system output power.
Detailed description of the invention
Fig. 1 is system framework figure of the invention；
Fig. 2 is adjustment schematic diagram of the invention；
Appended drawing reference: 1, voltage error adjustment module, 2, Capacitance Power estimation block, 3, electric inductance power estimation block, 4,
Active power command value rectification module, 5, active power control errors module, 6, reactive power error control module, 7, system function
Rate control module, 8, IGBT module.
Specific embodiment
As shown, the rectifier voltage outer ring adjustment circuit based on power dynamic Feedforward, including voltage error adjust mould
Block 1, Capacitance Power estimation block 2, electric inductance power estimation block 3, active power command value rectification module 4, active power error
Control module 5, reactive power error control module 6, system power control module 7 and IGBT module 8, wherein the voltage misses
Poor adjustment module 1 detects DC bus-bar voltage actual valueAnd after A/D is converted with DC bus-bar voltage instruction valueIt does
Difference is delivered separately to PI controller and Capacitance Power estimation block 2, PI controller operation active power of output error amount by difference
To active power command value rectification module 4；
The Capacitance Power estimation block 2 is by received difference and DC bus-bar voltage instruction valueMultiplying is carried out,
The Capacitance Power that each cycle system need to compensate is obtained, and the Capacitance Power is inputed into active power command value rectification module 4；
The electric inductance power estimation block 3 acquires current on line side d axis componentWith d axis component instruction valueIt is made the difference, and
By difference withMultiplying is carried out, obtains the electric inductance power that each cycle system need to compensate, and the electric inductance power has been inputed to
Function power command value rectification module 4；
The active power command value rectification module 4 is according to by the data received and inverter output loading power
Rectifier active power of output instruction value is calculated, and willInput to active power control errors module 5；
5 basis of active power control errors moduleWith the rectifier active power of output value of acquisitionIt is made the difference
Operation, obtained operation result pass to a PI controller in system power control module 7 and carry out operation, obtain rectifier
The d axis component of input voltage, and willPass to the space voltage vector control module in system power control module 7
SVPWM；
The reactive power error control module 6 is according to rectifier output reactive power valueIdle function is exported with rectifier
Rate instruction valueIt carries out doing difference operation, obtained operation result passes to a PI controller in system power control module 7
Operation is carried out, the q axis component of rectifier input voltage is obtained, and willPass to the space in system power control module 7
Voltage vector control module SVPWM；
Space voltage vector control module SVPWM in the system power control module (7) based on the received data into
Row operation, and export six bridge arm power device switching signals、、、、、(、、For upper three bridge arms
Switching signal,、、For symmetrical lower three bridge arm switching signals) to IGBT module 8, and then control IGBT module 8 and export
D-c bus voltage value after Overpower compensating, and according toControl rectifier power switching device.
The concrete operations for the Capacitance Power that each cycle system need to compensate are calculated in the Capacitance Power estimation block 2 are as follows:
D-c bus voltage value is sampled first, is filtered after circuit after testing, is removed the burr signal of interference,
Then by from the voltage signal of inspection circuit output, A/D conversion is carried out into DSP, and according to conversion value and formulaThe Capacitance Power that each cycle system need to compensate is calculated；
In formula,For dc-link capacitance value,For DC bus-bar voltage instruction value,For DC bus-bar voltage reality
Actual value,For system regulating cycle number,For system communication cycle；
The concrete operations for the electric inductance power that each cycle system need to compensate are calculated in the electric inductance power estimation block 3 are as follows:
Firstly, acquiring three-phase current component from rectification side senser, circuit, is filtered after testing, and removal is dry
The burr signal disturbed；
Secondly, will test the current signal of circuit output, A/D conversion is carried out into DSP, 3s/ is carried out after digital quantization
2r transformation, is transformed into two-phase rotational coordinates from three-phase static coordinate system and fastens；
Finally, according to electric current in two-phase rotating coordinate system d axis component value and formulaEach cycle is calculated
The electric inductance power that system need to compensate；
In formula,For net side filter inductance value,For current on line side d axis component instruction value,It is practical for current on line side d axis
Output valve,For system regulating cycle number,For system communication cycle；
The bearing powerObtain that steps are as follows:
Firstly, acquiring three-phase voltage, current component from inversion side senser, circuit, is filtered after testing, goes
Except the burr signal of interference；
Secondly, will test circuit output signal, A/D conversion is carried out into DSP；
Finally, calculating inverter output loading power according to voltage, the current value converted out,
, whereinFor inverter output line voltage,For inverter output line current,For the energy conversion factor of system, take
0.8。
Operating mode of the invention is:
First in ac-dc-ac transform system Startup time, since energy being not present in system, energy is all needed from electricity
Net side absorbs, and DC bus-bar voltage and current on line side are almost 0, and the inductance that system estimates and Capacitance Power are larger, and whole
It flows device outer voltage to adjust mainly based on PI controller, estimates power as compensation using inductance capacitance.It is opened for anti-locking system
It is unstable when dynamic, the setting estimation upper limit of the power value in DSP program can be shifted to an earlier date, but otherwise upper limit value too low should not will affect system
Control precision, reduce system response time.
Secondly, for rectifier current output close to stable state, rectifier output power is close to load function in system close to when stablizing
Rate, but outer voltage is adjusted still in adjustment state.At this time improve estimation upper limit of the power value, using inductance capacitance estimate power as
Mainly, rectifier active power of output is compensated.
Finally according to the output of adjustment rectifier active power until system reaches stable state.In bearing power jump, adopt
It is realized with bearing power with the control method that inductance capacitance estimation power combines and the dynamic of rectifier output power is compensated.Through
After overpower dynamic compensates, rectifier active power of output error can be reduced, realizes the quick tracking of power, it is female to reduce direct current
Line voltage fluctuation.
Claims (1)
1. the rectifier voltage outer ring adjustment circuit based on power dynamic Feedforward, it is characterised in that: adjust mould including voltage error
It is block (1), Capacitance Power estimation block (2), electric inductance power estimation block (3), active power command value rectification module (4), active
Power error control module (5), reactive power error control module (6), system power control module (7) and IGBT module (8),
Wherein, the voltage error adjustment module (1) detects DC bus-bar voltage actual valueAnd after A/D is converted with DC bus
Voltage instruction valueIt makes the difference, difference is delivered separately to PI controller and Capacitance Power estimation block (2), PI controller operation
It exports to active power command value rectification module (4)；
The Capacitance Power estimation block (2) is by received difference and DC bus-bar voltage instruction valueMultiplying is carried out, is obtained
The Capacitance Power that need to be compensated to each cycle system, and the Capacitance Power is inputed into active power command value rectification module (4)；
The electric inductance power estimation block (3) acquires current on line side d axis componentWith d axis component instruction valueIt is made the difference, and will
Difference withMultiplying is carried out, the electric inductance power that each cycle system need to compensate is obtained, and the electric inductance power is inputed to active
Power command value rectification module (4)；
The active power command value rectification module (4) is according to by the data received and inverter output loading powerMeter
Calculation obtains rectifier active power of output instruction value, and willInput to active power control errors module (5)；
Active power control errors module (5) basisWith the rectifier active power of output value of acquisitionIt carries out making the difference fortune
It calculates, obtained operation result passes to a PI controller in system power control module (7) and carries out operation, obtains rectifier
The d axis component of input voltage, and willPass to the space voltage vector control module in system power control module (7)
SVPWM；
The reactive power error control module (6) is according to rectifier output reactive power valueWith rectifier output reactive power
Instruction valueIt carries out doing difference operation, obtained operation result passes to the control of another PI in system power control module (7)
Device carries out operation, obtains the q axis component of rectifier input voltage, and willIt passes in system power control module (7)
Space voltage vector control module SVPWM；
Space voltage vector control module SVPWM in the system power control module (7) based on the received transported by data
It calculates, and exports six bridge arm power device switching signals、、、、、To IGBT module (8), and then control IGBT
Module (8) exports the d-c bus voltage value after Overpower compensating, and according toControl rectifier power derailing switch
Part；
The concrete operations for the Capacitance Power that each cycle system need to compensate are calculated in the Capacitance Power estimation block (2) are as follows:
D-c bus voltage value is sampled first, is filtered after circuit after testing, is removed the burr signal of interference, then
The voltage signal that will test circuit output carries out A/D conversion into DSP, and according to conversion value and formula
The Capacitance Power that each cycle system need to compensate is calculated；
In formula,For dc-link capacitance value,For system regulating cycle number,For system communication cycle；
The concrete operations for the electric inductance power that each cycle system need to compensate are calculated in the electric inductance power estimation block (3) are as follows:
Firstly, acquiring three-phase current component from rectification side senser, circuit, is filtered after testing, removes interference
Burr signal；
Secondly, will test the current signal of circuit output, A/D conversion is carried out into DSP, carries out 3s/2r change after digital quantization
It changes, is transformed into two-phase rotational coordinates from three-phase static coordinate system and fastens；
Finally, according to electric current in two-phase rotating coordinate system d axis component value and formulaEach cycle system is calculated
The electric inductance power that need to be compensated；
In formula,For net side filter inductance value,For system regulating cycle number,For system communication cycle；
The bearing powerObtain that steps are as follows:
Firstly, acquiring three-phase voltage, current component from inversion side senser, circuit, is filtered after testing, and removal is dry
The burr signal disturbed；
Secondly, will test circuit output signal, A/D conversion is carried out into DSP；
Finally, calculating inverter output loading power according to voltage, the current value converted out,,
In,For inverter output line voltage,For inverter output line current,For the energy conversion factor of system, take
0.8。
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| CN201610730764.5A CN106253697B (en) | 2016-08-26 | 2016-08-26 | Rectifier voltage outer ring adjustment circuit based on power dynamic Feedforward |
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| CN201610730764.5A CN106253697B (en) | 2016-08-26 | 2016-08-26 | Rectifier voltage outer ring adjustment circuit based on power dynamic Feedforward |
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| CN106253697B true CN106253697B (en) | 2018-12-04 |
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| CN107453616B (en) * | 2017-08-17 | 2019-09-06 | 河南科技大学 | Adjustment circuit based on double PWM coordinated control energy Fast-Balances |
| CN112134475A (en) * | 2020-09-27 | 2020-12-25 | 重庆大学 | Modularized multi-level rectifier without bus voltage sensor and controllable rectification method thereof |
| CN112994482B (en) * | 2021-03-09 | 2022-05-17 | 北京科技大学 | Model prediction power dynamic compensation control method of double-PWM frequency conversion system |
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| CN102593851A (en) * | 2012-02-10 | 2012-07-18 | 北方工业大学 | PWM rectifier control method under unbalanced power grid voltage based on power instruction compensation |
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| CN205986637U (en) * | 2016-08-26 | 2017-02-22 | 河南科技大学 | Rectifier voltage outer ring regulator circuit based on feedforward of power developments |
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2016
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| CN102593851A (en) * | 2012-02-10 | 2012-07-18 | 北方工业大学 | PWM rectifier control method under unbalanced power grid voltage based on power instruction compensation |
| CN104660074A (en) * | 2015-03-19 | 2015-05-27 | 朱鹏程 | Virtual flux-based coordination control method for direction powder of PWM rectifier |
| CN205986637U (en) * | 2016-08-26 | 2017-02-22 | 河南科技大学 | Rectifier voltage outer ring regulator circuit based on feedforward of power developments |
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Effective date of registration: 20220130 Address after: No.1427, Pingquan Road, Nanguan District, Changchun City, Jilin Province 130000 Patentee after: ECONOMIC TECHNOLOGY RESEARCH INSTITUTE OF STATE GRID JILIN ELECTRIC POWER CO.,LTD. Address before: 471000 No. 48, Xiyuan Road, Jianxi District, Henan, Luoyang Patentee before: HENAN University OF SCIENCE AND TECHNOLOGY |
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