CN106099953B - A kind of wind-powered electricity generation double-feed current transformer net-side rectifier active damping control method and system - Google Patents
A kind of wind-powered electricity generation double-feed current transformer net-side rectifier active damping control method and system Download PDFInfo
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The invention discloses a kind of wind-powered electricity generation double-feed current transformer net-side rectifier active damping control method and systems, and this method comprises the following steps: the voltage on line side and current on line side and DC side busbar voltage of S1. acquisition net-side rectifier；S2. voltage on line side axis component is calculated, resonance compensation component, current on line side axis component and current on line side active command value are inhibited；S3. grid-side converter compensation rate is calculated；S4. grid-side converter command voltage is calculated；S5. grid-side converter command voltage is transformed to grid-side converter three-phase command voltage, and carries out SVPWM modulation, adjust current transformer with obtained control pulse is modulated；The system includes: parameter acquisition module, the first computing module, the second computing module, third computing module, control module.The present invention has many advantages, such as that simple at low cost, control algolithm, high reliablity, stability are high.
Description
Technical field
The present invention relates to wind-powered electricity generation double-feed current transformer control field more particularly to a kind of wind-powered electricity generation double-feed current transformer net-side rectifiers
Active damping control method.
Background technique
The utilization rate of global renewable energy is increasing year by year in recent years, especially wind power generation, the growth of utilization rate
It is always most fast in the world.The maturation of wind power technology and showing for scale effect promote Wind turbines price constantly to decline, by
This bring wind power cost persistently reduces, and greatly have stimulated the fast development of localization of wind power equipment manufacturing.Current transformer net-side rectifier
The key effect that alternating current-direct current transformation of electrical energy is played in wind generator system is that the core that wind generator system is incorporated into the power networks is set
It is standby.
Currently, introducing of the filter due to capacitor C, produces a resonance peak, if this resonance peak cannot be fine
Damping, it is likely that cause grid-connected current to generate higher hamonic wave and even threaten the stability of system.Common damping mode
Be divided into passive damping and active damping, passive damping can by capacitor series resistance realize that but this mode is not only
The power loss of system is increased, but also filter can be reduced to the rejection ability of high band harmonic wave；Active damping is to pass through
Change the frame mode of controller to realize, additional power loss will not be brought.
To solve filter bring resonance problems in the case of without hindrance buffer resistance, some documents have made detailed ratio
Compared with；Such as the wind-powered electricity generation grid-side converter active damping strategy that LCL is filtered, the ac filter capacitance current that will be sampled in the publication
It send to microprocessor and send ac filter capacitance current to alternating-current controller after being handled.AC current control device is become by coordinate
Parallel operation, virtual impedance adjuster and divider are constituted.Three-phase alternating current filter capacitor current transformation is two-phase seat by coordinate converter
Electric current under mark system, obtains flowing through the electric current of virtual resistance, then the control of side must be exchanged through divider after virtual resistance adjuster
Amount processed is added in DC side control amount, but due to needing to acquire the electric current on ac filter capacitor, needs to increase hard
Part cost, control algolithm are more complex.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
The wind-powered electricity generation double-feed current transformer net that any hardware, at low cost, control algolithm is simple, high reliablity, stability are high kind is not needed to increase
Side rectifier active damping control method.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows: a kind of wind-powered electricity generation double-feed current transformer net side rectification
Device active damping control method, includes the following steps:
S1. voltage on line side (the U of net-side rectifier is obtaineda、Ub、Uc) and current on line side (ia、ib、ic) and DC side mother
Line voltage Udc；
S2. according to the voltage on line side (U of the net-side rectifiera、Ub、Uc) calculate voltage on line side axis component (Ud、Uq), inhibit
Resonance compensation component (ido、iqo), according to the current on line side (ia、ib、ic) calculate current on line side axis component (id、iq), according to institute
State the voltage on line side (U of net-side rectifiera、Ub、Uc) and DC side busbar voltage UdcCalculate current on line side active command value i* d；
S3. with the inhibition resonance compensation component (ido、iqo) it is used as feedback quantity, according to the current on line side active command
Value i* dWith preset current on line side reactive command value i* qCalculate grid-side converter compensation rate (Δ ud、Δuq)；
S4. with the voltage on line side axis component (Ud、Uq) it is feedforward amount, and decouple, according to the grid-side converter compensation rate
(Δud、Δuq) calculate grid-side converter command voltage (U* d、U* q)；
S5. by the grid-side converter command voltage (U* d、U* q) it is transformed to grid-side converter three-phase command voltage (U* a、U* b、U* c), and SVPWM modulation is carried out, current transformer is adjusted with obtained control pulse is modulated.
As a further improvement of the present invention, in the step S2, the voltage on line side axis component (Ud、Uq) by institute
State the voltage on line side (U of net-side rectifiera、Ub、Uc) carry out dq axis Synchronous Reference Frame Transform be calculated；
The inhibition resonance compensation component (ido、iqo) calculating step include: to the voltage on line side axis component (Ud、Uq)
Low-pass filtering is carried out, low pass axis component (U is obtaineddlowpass、Uqlowpass), to the voltage on line side axis component (Ud、Uq) and low pass
Axis component (Udlowpass、Uqlowpass) carry out univoltage feedback processing network voltage feedback quantity (U is calculatedΔq、UΔd), and multiplied by
The inhibition resonance compensation component (i is calculated in preset feed-forward coefficientsdo、iqo)；
Current on line side axis component (the id、iq) by the current on line side (ia、ib、ic) carry out the change of dq axis synchronous coordinate
It changes and is calculated；
The current on line side active command value i* dCalculating step include: voltage on line side according to the net-side rectifier
(Ua、Ub、Uc) calculate DC side busbar voltage instruction value U* dc, and to the DC side busbar voltage UdcWith the direct current side bus
Voltage instruction value U* dcPI adjusting is carried out, the current on line side active command value i is calculated* d。
As a further improvement of the present invention, the low pass axis component (Udlowpass、Uqlowpass) calculation formula such as formula
(1) shown in:
In formula (1), Udlowpass、UqlowpassRespectively low pass axis component, U 'dlowpassFor to the voltage on line side axis component
UdValue after carrying out low-pass filtering, U 'qlowpassFor to the voltage on line side axis component UqValue after carrying out low-pass filtering, Ud、Uq?
For voltage on line side axis component, kc is preset proportionality coefficient；
Shown in the calculation formula such as formula (2) of the univoltage feedback processing:
In formula (2), UΔq、UΔdIt is network voltage feedback quantity, Udlowpass、UqlowpassIt is low pass axis component, Ud、Uq?
For voltage on line side axis component, kvd1、kvd2、kvq1、kvq2It is preset proportionality coefficient；
The inhibition resonance compensation component (ido、iqo) calculation formula such as formula (3) shown in:
Formula (3), ido、iqoIt is to inhibit resonance compensation component, UΔq、UΔdIt is network voltage feedback quantity, gKDamp is pre-
If feed-forward coefficients, Vdconst、VqconstIt is preset compensation constant；
The DC side busbar voltage instruction value U* dcCalculation formula such as formula (4) shown in:
Udc*=max (Ua,Ub,Uc)*k+beta (4)
In formula (4), U* dcFor DC side busbar voltage instruction value, Ua、Ub、UcIt is the voltage on line side of net-side rectifier, k is
Preset proportionality coefficient, beta are preset offset.
As a further improvement of the present invention, the preset proportionality coefficient kc value is 0.3.
As a further improvement of the present invention, the specific steps of the step S3 include:
By the inhibition resonance compensation component idoThe current on line side active command value i is fed back to as feedback quantity* d, and
With the current on line side axis component idPI adjusting is carried out, grid-side converter compensation rate Δ u is calculatedd；
By the inhibition resonance compensation component iqoThe current on line side reactive command value i is fed back to as feedback quantity* q, and
With the current on line side axis component iqPI adjusting is carried out, grid-side converter compensation rate Δ u is calculatedq。
As a further improvement of the present invention, the middle calculating grid-side converter command voltage (U of the step S4* d、U* q)
Shown in calculation formula such as formula (5):
In formula (5), U* d、U* qIt is grid-side converter command voltage, Ud、UqIt is voltage on line side axis component, Δ ud、Δuq
It is grid-side converter compensation rate, i* dFor current on line side active command value, i* qFor current on line side reactive command value, L is preset
Reactance value,For preset coefficient.
A kind of wind-powered electricity generation double-feed current transformer net-side rectifier active damping control system, comprising:
Parameter acquisition module: for obtaining the voltage on line side (U of net-side rectifiera、Ub、Uc) and current on line side (ia、ib、
ic) and DC side busbar voltage Udc；
First computing module: for the voltage on line side (U according to the net-side rectifiera、Ub、Uc) calculate voltage on line side axis
Component (Ud、Uq), inhibit resonance compensation component (ido、iqo), according to the current on line side (ia、ib、ic) calculate current on line side axis point
Measure (id、iq), according to the voltage on line side (U of the net-side rectifiera、Ub、Uc) and DC side busbar voltage UdcCalculate current on line side
Active command value i* d；
Second computing module: for the inhibition resonance compensation component (ido、iqo) it is used as feedback quantity, according to the net
Side electric current active command value i* dWith preset current on line side reactive command value i* qCalculate grid-side converter compensation rate (Δ ud、Δ
uq)；
Third computing module: for the voltage on line side axis component (Ud、Uq) it is feedforward amount, and decouple, according to the net
Side current transformer compensation rate (Δ ud、Δuq) calculate grid-side converter command voltage (U* d、U* q)；
Control module: for the grid-side converter command voltage to be transformed to grid-side converter three-phase command voltage (U* a、
U* b、U* c), and SVPWM modulation is carried out, current transformer is adjusted with obtained control pulse is modulated.
Compared with the prior art, the advantages of the present invention are as follows:
1, the present invention by the three-phase power grid voltage of detection input, and extracts high frequency woth no need to additionally increase hardware device
Component can effectively inhibit humorous caused by LC filter in the case where being not necessarily to damping resistance by the method that Voltage Feedback controls
Vibration problem.
2, inventive algorithm is simple, and dynamic response is quick, steady, high reliablity, and stability is high.
Detailed description of the invention
Fig. 1 is specific embodiment of the invention flow diagram.
Fig. 2 is that the specific embodiment of the invention inhibits resonance compensation component to calculate control block diagram.
Fig. 3 is specific embodiment of the invention control block diagram.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
As shown in Figure 1, the present embodiment wind-powered electricity generation double-feed current transformer net-side rectifier active damping control method, including walk as follows
It is rapid: the voltage on line side (U of S1. acquisition net-side rectifiera、Ub、Uc) and current on line side (ia、ib、ic) and DC side busbar voltage
Udc；S2. according to the voltage on line side (U of net-side rectifiera、Ub、Uc) calculate voltage on line side axis component (Ud、Uq), inhibit resonance compensation
Component (ido、iqo), according to current on line side (ia、ib、ic) calculate current on line side axis component (id、iq), according to the net of net-side rectifier
Side voltage (Ua、Ub、Uc) and DC side busbar voltage UdcCalculate current on line side active command value i* d；S3. to inhibit resonance compensation
Component (ido、iqo) it is used as feedback quantity, according to current on line side active command value i* dWith preset current on line side reactive command value i* qMeter
Calculate grid-side converter compensation rate (Δ ud、Δuq)；S4. with voltage on line side axis component (Ud、Uq) it is feedforward amount, and decouple, according to net
Side current transformer compensation rate (Δ ud、Δuq) calculate grid-side converter command voltage (U* d、U* q)；S5. grid-side converter is instructed into electricity
Press (U* d、U* q) it is transformed to grid-side converter three-phase command voltage (U* a、U* b、U* c), and SVPWM modulation is carried out, with modulation gained
The control pulse adjustment current transformer arrived.
In the present embodiment, in step S2, voltage on line side axis component (Ud、Uq) pass through the voltage on line side to net-side rectifier
(Ua、Ub、Uc) carry out dq axis Synchronous Reference Frame Transform be calculated；Inhibit resonance compensation component (ido、iqo) calculating step include:
To voltage on line side axis component (Ud、Uq) low-pass filtering is carried out, obtain low pass axis component (Udlowpass、Uqlowpass), to voltage on line side
Axis component (Ud、Uq) and low pass axis component (Udlowpass、Uqlowpass) carrying out univoltage feedback processing, that network voltage is calculated is anti-
Feedback amount (UΔq、UΔd), and multiplied by preset feed-forward coefficients, it is calculated and inhibits resonance compensation component (ido、iqo)；Current on line side axis
Component (id、iq) by current on line side (ia、ib、ic) carry out dq axis Synchronous Reference Frame Transform be calculated；The active finger of current on line side
Enable value i* dCalculating step include: voltage on line side (U according to net-side rectifiera、Ub、Uc) calculate DC side busbar voltage instruction
Value U* dc, and to DC side busbar voltage UdcWith DC side busbar voltage instruction value U* dcPI adjusting is carried out, net side electricity is calculated
Flow active command value i* d。
In the present embodiment, low pass axis component (Udlowpass、Uqlowpass) calculation formula such as formula (1) shown in:
In formula (1), Udlowpass、UqlowpassRespectively low pass axis component, U 'dlowpassFor to voltage on line side axis component UdInto
Value after row low-pass filtering, U 'qlowpassFor to voltage on line side axis component UqValue after carrying out low-pass filtering, Ud、UqIt is net side electricity
Last item component, kc are preset proportionality coefficient；
Shown in the calculation formula of univoltage feedback processing such as formula (2):
In formula (2), UΔq、UΔdIt is network voltage feedback quantity, Udlowpass、UqlowpassIt is low pass axis component, Ud、Uq?
For voltage on line side axis component, kvd1、kvd2、kvq1、kvq2It is preset proportionality coefficient；
Inhibit resonance compensation component (ido、iqo) calculation formula such as formula (3) shown in:
Formula (3), ido、iqoIt is to inhibit resonance compensation component, UΔq、UΔdIt is network voltage feedback quantity, gKDamp is pre-
If feed-forward coefficients, Vdconst、VqconstIt is preset compensation constant；
DC side busbar voltage instruction value U* dcCalculation formula such as formula (4) shown in:
Udc*=max (Ua,Ub,Uc)*k+beta (4)
In formula (4), U* dcFor DC side busbar voltage instruction value, Ua、Ub、UcIt is the voltage on line side of net-side rectifier, k is
Preset proportionality coefficient, beta are preset offset.In the present embodiment, preset proportionality coefficient kc value is 0.3.When
So, or other values.
As shown in Fig. 2, voltage on line side axis component (Ud、Uq) through abc/dq carry out dq axis Synchronous Reference Frame Transform obtain net side electricity
Last item component (Ud、Uq), then carry out the low-pass filtering as shown in formula (1) through lowpassfilter and obtain low pass axis component
(Udlowpass、Uqlowpass), to voltage on line side axis component (Ud、Uq) and low pass axis component (Udlowpass、Uqlowpass) carry out such as formula
(2) network voltage feedback quantity (U is calculated in univoltage feedback processing shown inΔq、UΔd), it is multiplied by preset feedforward through H (S)
Number calculate as shown in formula (3), the resonance compensation that is inhibited component (ido、iqo)。
In the present embodiment, as shown in figure 3, the specific steps of step S3 include: that will inhibit resonance compensation component idoAs
Feedback quantity feeds back to current on line side active command value i* d, and with current on line side axis component idPI adjusting is carried out, net side is calculated
Current transformer compensation rate Δ ud；It will inhibit resonance compensation component iqoCurrent on line side reactive command value i is fed back to as feedback quantity* q, and
With current on line side axis component iqPI adjusting is carried out, grid-side converter compensation rate Δ u is calculatedq。
In the present embodiment, the middle calculating grid-side converter command voltage (U of step S4* d、U* q) calculation formula such as formula
(5) shown in:
In formula (5), U* d、U* qIt is grid-side converter command voltage, Ud、UqIt is voltage on line side axis component, Δ ud、Δuq
It is grid-side converter compensation rate, i* dFor current on line side active command value, i* qFor current on line side reactive command value, L is preset
Reactance value,For preset coefficient.
In the present embodiment, by grid-side converter command voltage (U* d、U* q) it is transformed to grid-side converter three-phase command voltage
(U* a、U* b、U* c), and SVPWM modulation is carried out, obtains the duty ratio of rectification circuit IGBT switching tube, by Drive Protecting Circuit,
Control rectification circuit switching tube is opened and is judged, to realize the adjustment to current transformer.A kind of wind-powered electricity generation double-feed current transformer net side
Rectifier active damping control system, comprising:
Parameter acquisition module: for obtaining the voltage on line side (U of net-side rectifiera、Ub、Uc) and current on line side (ia、ib、
ic) and DC side busbar voltage Udc；
First computing module: for the voltage on line side (U according to net-side rectifiera、Ub、Uc) calculate voltage on line side axis component
(Ud、Uq), inhibit resonance compensation component (ido、iqo), according to current on line side (ia、ib、ic) calculate current on line side axis component (id、
iq), according to the voltage on line side (U of net-side rectifiera、Ub、Uc) and DC side busbar voltage UdcCalculate current on line side active command value
i* d；
Second computing module: for inhibit resonance compensation component (ido、iqo) it is used as feedback quantity, had according to current on line side
Function instruction value i* dWith preset current on line side reactive command value i* qCalculate grid-side converter compensation rate (Δ ud、Δuq)；
Third computing module: for voltage on line side axis component (Ud、Uq) it is feedforward amount, and decouple, according to grid-side converter
Compensation rate (Δ ud、Δuq) calculate grid-side converter command voltage (U* d、U* q)；
Control module: for grid-side converter command voltage to be transformed to grid-side converter three-phase command voltage (U* a、U* b、
U* c), and SVPWM modulation is carried out, current transformer is adjusted with obtained control pulse is modulated.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Although of the invention
It has been disclosed in a preferred embodiment above, however, it is not intended to limit the invention.Therefore, all without departing from technical solution of the present invention
Content, technical spirit any simple modifications, equivalents, and modifications made to the above embodiment, should all fall according to the present invention
In the range of technical solution of the present invention protection.
Claims (5)
1. a kind of wind-powered electricity generation double-feed current transformer net-side rectifier active damping control method, which comprises the steps of:
S1. the voltage on line side U of net-side rectifier is obtaineda、Ub、UcWith current on line side ia、ib、icAnd DC side busbar voltage Udc；
S2. according to the voltage on line side U of the net-side rectifiera、Ub、UcCalculate voltage on line side axis component Ud、Uq, inhibit resonance compensation
Component ido、iqo, according to the current on line side ia、ib、icCalculate current on line side axis component id、iq, according to the net-side rectifier
Voltage on line side Ua、Ub、UcWith DC side busbar voltage UdcCalculate current on line side active command value i* d；
S3. with the inhibition resonance compensation component ido、iqoAs feedback quantity, according to the current on line side active command value i* dWith
Preset current on line side reactive command value i* qCalculate net-side rectifier compensation rate Δ ud、Δuq；
S4. with the voltage on line side axis component Ud、UqIt for feedforward amount, and decouples, according to the net-side rectifier compensation rate Δ ud、
ΔuqCalculate net-side rectifier command voltage U* d、U* q；
S5. by the net-side rectifier command voltage U* d、U* qIt is transformed to net-side rectifier three-phase command voltage U* a、U* b、U* c, and
SVPWM modulation is carried out, adjusts current transformer with obtained control pulse is modulated；
In the step S2, the voltage on line side axis component Ud、UqPass through the voltage on line side U to the net-side rectifiera、Ub、Uc
Dq axis Synchronous Reference Frame Transform is carried out to be calculated；
The inhibition resonance compensation component ido、iqoCalculating step include: to the voltage on line side axis component Ud、UqCarry out low pass
Filtering, obtains low pass axis component Udlowpass、Uqlowpass, to the voltage on line side axis component Ud、UqWith low pass axis component Udlowpass、
UqlowpassIt carries out univoltage feedback processing and network voltage feedback quantity U is calculatedΔq、UΔd, and multiplied by preset feed-forward coefficients, meter
Calculation obtains the inhibition resonance compensation component ido、iqo；
The current on line side axis component id、iqBy to the current on line side ia、ib、icDq axis Synchronous Reference Frame Transform is carried out to calculate
It arrives；
The current on line side active command value i* dCalculating step include: voltage on line side U according to the net-side rectifiera、Ub、
UcCalculate DC side busbar voltage instruction value U* dc, and to the DC side busbar voltage UdcRefer to the DC side busbar voltage
Enable value U* dcPI adjusting is carried out, the current on line side active command value i is calculated* d；
The low pass axis component Udlowpass、UqlowpassCalculation formula such as formula (1) shown in:
In formula (1), Udlowpass、UqlowpassRespectively low pass axis component, U 'dlowpassFor to the voltage on line side axis component UdIt carries out
Value after low-pass filtering, U 'qlowpassFor to the voltage on line side axis component UqValue after carrying out low-pass filtering, Ud、UqIt is net side
Voltage axis component, kc are preset proportionality coefficient；
Shown in the calculation formula such as formula (2) of the univoltage feedback processing:
In formula (2), UΔq、UΔdIt is network voltage feedback quantity, Udlowpass、UqlowpassIt is low pass axis component, Ud、UqIt is net
Side voltage axis component, kvd1、kvd2、kvq1、kvq2It is preset proportionality coefficient；
The inhibition resonance compensation component ido、iqoCalculation formula such as formula (3) shown in:
Formula (3), ido、iqoIt is to inhibit resonance compensation component, UΔq、UΔdIt is network voltage feedback quantity, gKDamp is preset
Feed-forward coefficients, Vdconst、VqconstIt is preset compensation constant；
The DC side busbar voltage instruction value U* dcCalculation formula such as formula (4) shown in:
Udc*=max (Ua,Ub,Uc)*k+beta (4)
In formula (4), U* dcFor DC side busbar voltage instruction value, Ua、Ub、UcIt is the voltage on line side of net-side rectifier, k is default
Proportionality coefficient, beta be preset offset.
2. wind-powered electricity generation double-feed current transformer net-side rectifier active damping control method according to claim 1, it is characterised in that:
The preset proportionality coefficient kc value is 0.3.
3. according to claim 1 to 2 described in any item wind-powered electricity generation double-feed current transformer net-side rectifier active damping control methods,
It is characterized in that, the specific steps of the step S3 include:
By the inhibition resonance compensation component idoThe current on line side active command value i is fed back to as feedback quantity* d, and with it is described
Current on line side axis component idPI adjusting is carried out, net-side rectifier compensation rate Δ u is calculatedd；
By the inhibition resonance compensation component iqoThe current on line side reactive command value i is fed back to as feedback quantity* q, and with it is described
Current on line side axis component iqPI adjusting is carried out, net-side rectifier compensation rate Δ u is calculatedq。
4. wind-powered electricity generation double-feed current transformer net-side rectifier active damping control method according to claim 3, which is characterized in that
The middle calculating net-side rectifier command voltage U of the step S4* d、U* qCalculation formula such as formula (5) shown in:
In formula (5), U* d、U* qIt is net-side rectifier command voltage, Ud、UqIt is voltage on line side axis component, Δ ud、ΔuqIt is
Net-side rectifier compensation rate, i* dFor current on line side active command value, i* qFor current on line side reactive command value, L is preset reactance
Value,For preset coefficient.
5. a kind of wind-powered electricity generation double-feed current transformer net-side rectifier active damping control system characterized by comprising
Parameter acquisition module: for obtaining the voltage on line side U of net-side rectifiera、Ub、UcWith current on line side ia、ib、ic, Yi Jizhi
Flow side bus voltage Udc；
First computing module: for the voltage on line side U according to the net-side rectifiera、Ub、UcCalculate voltage on line side axis component Ud、
Uq, inhibit resonance compensation component ido、iqo, according to the current on line side ia、ib、icCalculate current on line side axis component id、iq, according to
The voltage on line side U of the net-side rectifiera、Ub、UcWith DC side busbar voltage UdcCalculate current on line side active command value i* d；
Second computing module: for the inhibition resonance compensation component ido、iqoAs feedback quantity, had according to the current on line side
Function instruction value i* dWith preset current on line side reactive command value i* qCalculate net-side rectifier compensation rate Δ ud、Δuq；
Third computing module: for the voltage on line side axis component Ud、UqIt for feedforward amount, and decouples, is rectified according to the net side
Device compensation rate Δ ud、ΔuqCalculate net-side rectifier command voltage U* d、U* q；
Control module: for the net-side rectifier command voltage to be transformed to net-side rectifier three-phase command voltage U* a、U* b、
U* c, and SVPWM modulation is carried out, current transformer is adjusted with obtained control pulse is modulated；
The voltage on line side axis component Ud、UqPass through the voltage on line side U to the net-side rectifiera、Ub、UcCarry out the synchronous seat of dq axis
Mark transformation calculations obtain；
The inhibition resonance compensation component ido、iqoCalculating step include: to the voltage on line side axis component Ud、UqCarry out low pass
Filtering, obtains low pass axis component Udlowpass、Uqlowpass, to the voltage on line side axis component Ud、UqWith low pass axis component Udlowpass、
UqlowpassIt carries out univoltage feedback processing and network voltage feedback quantity U is calculatedΔq、UΔd, and multiplied by preset feed-forward coefficients, meter
Calculation obtains the inhibition resonance compensation component ido、iqo；
The current on line side axis component id、iqBy to the current on line side ia、ib、icDq axis Synchronous Reference Frame Transform is carried out to calculate
It arrives；
The current on line side active command value i* dCalculating step include: voltage on line side U according to the net-side rectifiera、Ub、
UcCalculate DC side busbar voltage instruction value U* dc, and to the DC side busbar voltage UdcRefer to the DC side busbar voltage
Enable value U* dcPI adjusting is carried out, the current on line side active command value i is calculated* d；
The low pass axis component Udlowpass、UqlowpassCalculation formula such as formula (1) shown in:
In formula (1), Udlowpass、UqlowpassRespectively low pass axis component, U 'dlowpassFor to the voltage on line side axis component UdIt carries out
Value after low-pass filtering, U 'qlowpassFor to the voltage on line side axis component UqValue after carrying out low-pass filtering, Ud、UqIt is net side
Voltage axis component, kc are preset proportionality coefficient；
Shown in the calculation formula such as formula (2) of the univoltage feedback processing:
In formula (2), UΔq、UΔdIt is network voltage feedback quantity, Udlowpass、UqlowpassIt is low pass axis component, Ud、UqIt is net
Side voltage axis component, kvd1、kvd2、kvq1、kvq2It is preset proportionality coefficient；
The inhibition resonance compensation component ido、iqoCalculation formula such as formula (3) shown in:
Formula (3), ido、iqoIt is to inhibit resonance compensation component, UΔq、UΔdIt is network voltage feedback quantity, gKDamp is preset
Feed-forward coefficients, Vdconst、VqconstIt is preset compensation constant；
The DC side busbar voltage instruction value U* dcCalculation formula such as formula (4) shown in:
Udc*=max (Ua,Ub,Uc)*k+beta (4)
In formula (4), U* dcFor DC side busbar voltage instruction value, Ua、Ub、UcIt is the voltage on line side of net-side rectifier, k is default
Proportionality coefficient, beta be preset offset.
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| KR20140039389A (en) * | 2012-09-20 | 2014-04-02 | 한국전력공사 | Apparatus and method for controlling diminishing power fluctuation of small wind turbine system |
| WO2014174667A1 (en) * | 2013-04-26 | 2014-10-30 | 富士電機株式会社 | Resonance suppression device |
| CN104868497A (en) * | 2015-06-01 | 2015-08-26 | 华中科技大学 | Non-flux observation doubly-fed induction generator low voltage ride-through control method and system |
| CN105680754A (en) * | 2016-02-25 | 2016-06-15 | 清华大学 | D-axis and A-axis current vector composite controller of permanent-magnet synchronous motor |
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| CN1992496A (en) * | 2006-03-08 | 2007-07-04 | 合肥阳光电源有限公司 | Control structure of double-fed AC-DC-AC converter for wind power generation |
| KR20140039389A (en) * | 2012-09-20 | 2014-04-02 | 한국전력공사 | Apparatus and method for controlling diminishing power fluctuation of small wind turbine system |
| WO2014174667A1 (en) * | 2013-04-26 | 2014-10-30 | 富士電機株式会社 | Resonance suppression device |
| CN104868497A (en) * | 2015-06-01 | 2015-08-26 | 华中科技大学 | Non-flux observation doubly-fed induction generator low voltage ride-through control method and system |
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