CN107863783B - Doubly-fed wind turbine virtual synchronous control method - Google Patents
Doubly-fed wind turbine virtual synchronous control method Download PDFInfo
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- CN107863783B CN107863783B CN201711010991.1A CN201711010991A CN107863783B CN 107863783 B CN107863783 B CN 107863783B CN 201711010991 A CN201711010991 A CN 201711010991A CN 107863783 B CN107863783 B CN 107863783B
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/007—Control circuits for doubly fed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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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
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Abstract
The present invention provides a kind of doubly-fed wind turbine virtual synchronous control methods, it include: the control for carrying out active power, reactive power to rotor-side converter and grid-side converter respectively, generate corresponding rotor-side three-phase modulations wave and net side three-phase modulations wave, wherein: rotor-side three-phase modulations wave is for controlling rotor-side converter, so that double-fed wind power generator rotor side current transformer externally embodies voltage source characteristic, the inertia response characteristic and droop characteristic of similar synchronous generator is presented；Net side three-phase modulations wave surveys current transformer, stable DC busbar voltage for controlling net, so that doubly-fed wind turbine net is surveyed current transformer and run according to unity power factor, the inertia response characteristic of similar synchronous generator is presented.The present invention designs virtual synchronous control strategy in current transformer level, avoids the maximum power that can capture of loss blower, solves virtual synchronous control and blower can capture contradiction between maximum power；Without in DC link shunt capacitance as energy snubber.
Description
Technical field
The present invention relates to generator control technical fields, and in particular, to doubly-fed wind turbine virtual synchronous controlling party
Method.
Background technique
As using wind-power electricity generation, photovoltaic power generation as the rapid development of the clean energy resource of representative, electric system is being passed through in the recent period
Go through the transformation from centralization power generation to distributed generation system, most of wind-driven generator by electronic power convertor and
Power grid carries out the interaction of energy, realizes that unit power runs and reduces current distortion.Traditional synchronous generator and wind-power electricity generation
Machine is compared, and synchronous generator has the advantage natural friendly to power grid, can be maintained in grid voltage sags or interference be
System power-balance, voltage stabilization and frequency stabilization.How virtual synchronous motor (Virtual is carried out to double-fed blower
Synchronous Generator, VSG) control, so that double-fed blower is with the inertia response similar with synchronous generator and together
Step characteristic becomes the main direction of development of next step double-fed air-blower control.
Currently, dual feedback wind power generation system virtual synchronous control technology mainly has paddle control and current transformer to control two types
Type.In paddle control, outer plus virtual inertia part, passes through the control to pitch angle and revolving speed in maximum power tracking curve
Synchronous generator is simulated, but this method has clearly disadvantageous place, reality can not be exported by being mainly reflected in wind-driven generator
On maximum power, but export by virtual inertia modification after maximum power, using output power loss be cost acquisition
The virtual synchronous characteristic of blower.Equally, in current transformer control, by the improvement for wind electric converter control strategy, make to become
Stream device externally embodies the characteristic of virtual inertia, since the virtual synchronous control to current transformer generally requires at DC bus simultaneously
One buffering capacitor of connection provides virtual inertia, and the requirement to buffering capacitor is very stringent, therefore from a cost perspective, the control
Method processed equally has apparent defect.
Through retrieving
Zhou Tianpei, the research [J] that variable speed wind unit virtual inertia controls under high permeability, Proceedings of the CSEE:
The gyrating mass block using double fed induction generators is disclosed in the document of 2017 (2) and is connected in parallel on rotor-side converter and power grid
Supercapacitor between the converter of side is used as virtual inertia source simultaneously, realizes for " hiding " in double fed induction generators
Inertia is effectively utilized, and is controlled using self-adjusted fuzzy control strategy, in grid voltage sags or interference
It can maintain system power balance, voltage stabilization and frequency stabilization.But the method in title document off the net will appear weak
More serious operation stability problem, and the technical solution can only be directed to power network fluctuation when provide inertia response, Wu Fa
Sufficient inertia response is provided when wind speed quickly changes.
Lee and Ming, Zhang Xiangyu, Wang Yi, the double-fed wind power generator group virtual inertia control for waiting to optimize based on power tracking
Technology [J] Proceedings of the CSEE, 2012,32 (7): the document of 32-39 disclose the virtual rotation inertia of double-fed unit with
Rotational speed regulation and the relationship of mains frequency variation, propose the virtual inertia control strategy of double-fed fan motor unit.The control strategy is logical
The variation of detection mains frequency is crossed to adjust maximum power tracking curve, so that the kinetic energy of double-fed unit " hiding " is discharged, to power grid
Dynamic frequency is provided to support.But the control method in title document only proves that hair can be extracted by modifying optimal performance graph
Motor inertia, but do not propose how to optimize modification performance graph, also there is no the supports of related algorithm.When applying in wind
When power generator, the control method in title document can not export actual maximum power, but export and pass through virtual inertia
Maximum power after modification obtains the virtual synchronous characteristic of blower using output power loss as cost.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of controls of doubly-fed wind turbine virtual synchronous
Method.
The doubly-fed wind turbine virtual synchronous control method provided according to the present invention, comprising: respectively to rotor-side unsteady flow
Device and grid-side converter carry out the control of active power, reactive power, generate corresponding rotor-side three-phase modulations wave and net side three
Phase modulating wave, in which:
The rotor-side three-phase modulations wave is for controlling rotor-side converter, so that double-fed wind power generator rotor side unsteady flow
Device externally embodies voltage source characteristic, and the inertia response characteristic and droop characteristic of similar synchronous generator is presented, and control generator is defeated
Power tracking optimal power curve out；
The net side three-phase modulations wave surveys current transformer, stable DC busbar voltage for controlling net, so that double-fed wind-force is sent out
Motor net is surveyed current transformer and is run according to unity power factor, and the inertia response characteristic of similar synchronous generator is presented.
Optionally, the control that active power, reactive power are carried out to rotor-side converter, generates corresponding rotor-side three-phase
Modulating wave, comprising:
Revolving speed by tracking doubly-fed wind turbine obtains the maximum power P of the doubly-fed wind turbineopt；
According to the maximum power PoptObtain the slippage angle θ of double-fed blowerslip；According to the slippage angle of the double-fed blower
θslipGenerate rotor-side three-phase modulations wave.
Optionally, the control that active power, reactive power are carried out to grid-side converter, generates corresponding net side three-phase modulations
Wave, comprising:
Using the difference of DC bus-bar voltage given value and actual value as the input value of pi regulator, the pi regulator
Output valve is that net surveys virtual synchronous generator mechanical torque Tm_GSC；
According to the virtual synchronous generator mechanical torque Tm_GSCIt obtains net and surveys modulating wave phase angle θGSC；
Net is surveyed to the given reactive power Q of current transformerg *The reactive power Q of current transformer is surveyed with netgDifference as PI adjust
The input value of device, the output valve of the pi regulator are net side three-phase modulations wave amplitude Emag_GSC, pass through net side three-phase modulations wave
Amplitude Emag_GSCModulating wave phase angle θ is surveyed to netGSCAnd preset phase shift values carry out sine operation, export net side three-phase tune
Wave amplitude processed, to form net side three-phase modulations wave.
Optionally, the revolving speed by tracking doubly-fed wind turbine obtains the maximum work of the doubly-fed wind turbine
Rate Popt, comprising:
Pass through the rotational speed omega of doubly-fed wind turbine described in maximal power tracing MPPT module tracksr, pass through the double-fed
The rotational speed omega of wind-driven generatorrObtain maximum power Popt。
Optionally, described according to the maximum power PoptObtain the slippage angle θ of double-fed blowerslip, comprising:
According to doubly-fed wind turbine grid entry point given frequency f*Difference with the frequency f of reality output is by sagging amplification system
Number is KpEnhanced processing after, the peak power output P with the doubly-fed wind turbineoptIt is defeated that addition obtains modified maximum
Power P outoptref；
By the modified peak power output PoptrefVirtually turned by the mechanical gyrator equation of synchronous generator
Sub- electrical angle obtains slippage angle θ after subtracting each other the hypothetical rotor electrical angle and double-fed fan rotor angleslip；Wherein, synchronous
The mechanical gyrator equation of generator is as follows:
In formula: TmAnd TeRespectively machine torque and electromagnetic torque；ω and ωnIt is practical angular rate and specified electricity respectively
Angular speed；DpFor damped coefficient；J is the rotor moment of inertia of synchronous generator.
Optionally, the slippage angle θ according to the double-fed blowerslipGenerate rotor-side three-phase modulations wave, comprising:
By grid entry point given voltage Us *With grid entry point voltage UsInput value of the difference as pi regulator, the PI adjusts
The output valve of device is rotor-side three-phase modulations wave amplitude Emag_RSC, pass through rotor-side three-phase modulations wave amplitude Emag_RSCTo described double
Present the slippage angle θ of blowerslipAnd preset phase shift values progress sine operation, output rotor side three-phase modulations wave amplitude,
To form rotor-side three-phase modulations wave.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, doubly-fed wind turbine virtual synchronous control method provided by the invention, by the way that wind power generator rotor side is arranged
The virtual synchronous control strategy that current transformer and net survey current transformer is disturbed so that current transformer externally embodies virtual Inertia Characteristics receiving
It can be can be realized after dynamic with quick recovery system frequency and voltage stabilization, the control strategy before without using buffering capacitor
It puts, reaches rotor-side converter and net surveys the virtual synchronous control of current transformer.To design virtual synchronous in current transformer level
Control strategy, the maximum power for avoiding loss blower from can capture, maximum work can be captured by solving virtual synchronous control and blower
Contradiction between rate；Without, as energy snubber, reducing practical application cost in DC link shunt capacitance.
2, doubly-fed wind turbine virtual synchronous control method provided by the invention, rotor-side converter and net survey current transformer
It is virtual synchronous control, voltage source is presented as in electrical characteristic, is conducive to weak stable operation off the net.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the functional block diagram of doubly-fed wind turbine virtual synchronous control method provided by the invention；
Fig. 2 is rotor-side converter virtual synchronous control block diagram；
Fig. 3 is rotor-side converter active power VSG control flow chart；
Fig. 4 is rotor-side converter reactive power VSG control flow chart；
Fig. 5 is that net surveys current transformer virtual synchronous control block diagram；
Fig. 6 is grid-side converter active power VSG control flow chart；
Fig. 7 is grid-side converter reactive power VSG control flow chart；
Fig. 8 is that net surveys current transformer starting and the DC bus-bar voltage of network simulation and changing over time for current transformer reactive power
Schematic diagram；
Fig. 9 is the schematic diagram that wind speed changes that current transformer VSG control parameter in lower rotor part side changes over time.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
Doubly-fed wind turbine is since by exchange electrical excitation, active power and reactive power can be decoupled and be carried out respectively
Control, the stator of doubly-fed wind turbine are directly connected with power grid, while rotor windings pass through a back-to-back (back-to-
Back) current transformer is connected with power grid.In traditional doubly-fed wind turbine control strategy, it is steady that net surveys current transformer control DC voltage
Determine and realizes that unity power factor is run；Rotor-side converter controls blower and exports the maximum power corresponded under wind speed.
Aiming at the problems existing in the prior art, doubly-fed wind turbine virtual synchronous control method provided by the invention,
The virtual synchronous control strategy that current transformer is surveyed by setting wind power generator rotor side current transformer and net, so that current transformer is to ectosome
Now virtual Inertia Characteristics, can be with quick recovery system frequency and voltage stabilization after receiving disturbance, which can
Realize that reaching rotor-side converter and net under the premise of without using buffering capacitor surveys the virtual synchronous control of current transformer.
Fig. 1 is the functional block diagram of doubly-fed wind turbine virtual synchronous control method provided by the invention, as shown in Figure 1,
The control of active power, reactive power is carried out to rotor-side converter and grid-side converter respectively.Wherein, PrIt is active for rotor-side
Power, QrFor rotor-side reactive power, QgFor net side reactive power, QsFor stator reactive power, IrFor rotor current, IsFor stator
Electric current, IgCurrent transformer electric current, P are surveyed for netrFor rotor active power, PsFor stator active power, PgCurrent transformer wattful power is surveyed for net
Rate, XcDu/dt filter inductance, U are surveyed for netsFor grid entry point voltage, θsFor grid voltage phase-angle, PoptFor maximum power, θslipFor
Slippage angle, θGSCModulating wave phase angle, U are surveyed for netdcFor DC bus-bar voltage.
Fig. 2 is rotor-side converter virtual synchronous control block diagram, as shown in Fig. 2, passing through first for rotor-side converter
Maximal power tracing (Maximum Power Point Tracking, MPPT) module tracks doubly-fed wind turbine (Double
Fed Induction Generator, DFIG) rotational speed omegar, obtain maximum power Popt, secondly according to maximum power Popt
Obtain the slippage angle θ of double-fed blowerslip(being calculated by rotor-side active power VSG control module), finally according to
The slippage angle θ of double-fed blowerslipIt generates three-phase modulations wave (handling to obtain by reactive power VSG control module).Wherein, ωrFor
Doubly-fed wind turbine revolving speed, urFor rotor-side converter three-phase modulations wave, θrFor rotor phase angle.
Fig. 3 is rotor-side converter active power VSG control flow chart, as shown in figure 3, doubly-fed wind turbine grid entry point
Given frequency f*Passing through sagging amplification coefficient with the difference of the frequency f of reality output is KpEnhanced processing after, with the double-fed wind-force
The peak power output P of generatoroptAddition obtains modified peak power output Poptref.Modified peak power output
PoptrefHypothetical rotor electrical angle is obtained by the mechanical gyrator equation of synchronous generator, by the hypothetical rotor electrical angle and double
Feedback fan rotor angle obtains slippage angle θ after subtracting each otherslip.Wherein, Tm_RSCFor the virtual machine torque of virtual synchronous generator,
PrFor rotor-side converter active power, ωsFor synchronous rotational speed, ωRSCFor generator-side converter wear virtual synchronous generator angular speed,
ωbFor generator angular speed a reference value, DpFor damped coefficient, ωrFor double-fed generator revolving speed.
Specifically, the mechanical gyrator equation of synchronous generator is as follows:
In formula: TmAnd TeRespectively machine torque and electromagnetic torque；ω and ωnIt is practical angular rate and specified electricity respectively
Angular speed；DpFor damped coefficient；J is the rotor moment of inertia of synchronous generator.
Fig. 4 is rotor-side converter reactive power VSG control flow chart, as shown in figure 4, rotor-side converter reactive power
Reactive power-voltage (Q-U) sagging control function in VSG control simulation synchronous generator, generates grid entry point voltage and gives Us *,
Grid entry point voltage stabilization is maintained by PI controller, externally embodies preferable voltage source characteristic, the output of PI controller is to turn
Sub- side three-phase modulations wave amplitude and slippage angle θslipIt is formed together rotor-side three-phase modulations wave.Wherein, Emag_RSCFor rotor-side three
Mutually modulation wave amplitude, uarFor rotor-side A phase modulating wave, ubrFor rotor-side B phase modulating wave, ucrFor rotor-side C phase modulating wave.
Fig. 5 is that net surveys current transformer virtual synchronous control block diagram；Fig. 6 is grid-side converter active power VSG control flow chart,
As shown in fig. 6, double-fed wind power generator converter DC bus-bar voltage given value Udc *With the DC bus-bar voltage U of reality outputdc
Input value of the difference as pi regulator, the output valve of the pi regulator controls as grid-side converter active power VSG
The input of module exports θ by the synchronous generator rotor equation of motionGSC, allow net to survey current transformer and transmit inertia.Wherein,
UgFor network voltage, θgFor grid voltage phase-angle, θGSCModulating wave phase angle, u are surveyed for netrThree-phase modulations wave, ω are surveyed for netGSCFor net
Current transformer virtual synchronous generator angular speed is surveyed, Δ ω is that net surveys current transformer virtual synchronous generator frequency deviation.
Fig. 7 is grid-side converter reactive power VSG control flow chart, as shown in fig. 7, it is idle that net is surveyed giving for current transformer
Power Qg *The reactive power Q of current transformer is surveyed with netgInput value of the difference as pi regulator, the output valve of the pi regulator
For Emag_GSC, pass through Emag_GSCTo θGSCAnd preset phase shift values carry out sine operation, export net side three-phase modulations wave amplitude
Value, to form net side three-phase modulations wave.
More detailed explanation is done to the method in the present invention combined with specific embodiments below.
According to certain 2MW Wind turbines parameter in the market, mean wind speed 7m/s is constant, and grid short circuit ratio is 2, and corresponding power grid is short
Roadlock resists for 0.5pu, and emulation platform is RTDS Real Time Digital Simulator, and double-fed blower is carried out according to grid-connected process, is divided into three
Stage, variable pitch constant rate period, net are surveyed current transformer startup stage and rotor-side converter startup stage, and net surveys current transformer and starts situation
As shown in figure 8 above, in the case where net surveys virtual synchronous VSG control, DC bus-bar voltage immediate stability is arrived after net surveys current transformer starting
1.5kV, and netting survey Reactive Power Control is 0, realizes unity power factor operation.
Fig. 9 is that wind speed changes the schematic diagram that changes over time of lower rotor part side current transformer VSG control parameter, choose it is above-mentioned certain
2MW double-fed fan motor unit verifies rotor-side converter virtual synchronous control effect in wind speed Spline smoothing, in simulation time 3s
When by wind speed from 7m/s step be 8m/s, under rotor-side converter VSG control strategy, system active response wind speed variation for
The influence of grid entry point voltage stablizes grid entry point output voltage by the variation that rotor-side modulates wave amplitude, embodies voltage-source type
The control feature of inverter.
It should be noted that the step in the doubly-fed wind turbine virtual synchronous control method provided by the invention,
It can use corresponding module, device, unit etc. in doubly-fed wind turbine virtual synchronous control system to be achieved, this field
The technical solution that technical staff is referred to the system realizes the step process of the method, that is, the implementation in the system
Example can be regarded as realizing the preference of the method, and it will not be described here.
One skilled in the art will appreciate that in addition to realizing system provided by the invention in a manner of pure computer readable program code
And its other than each device, completely can by by method and step carry out programming in logic come so that system provided by the invention and its
Each device is in the form of logic gate, switch, specific integrated circuit, programmable logic controller (PLC) and embedded microcontroller etc.
To realize identical function.So system provided by the invention and its every device are considered a kind of hardware component, and it is right
The device for realizing various functions for including in it can also be considered as the structure in hardware component；It can also will be for realizing each
The device of kind function is considered as either the software module of implementation method can be the structure in hardware component again.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (5)
1. a kind of doubly-fed wind turbine virtual synchronous control method characterized by comprising respectively to rotor-side converter and
Grid-side converter carries out the control of active power, reactive power, generates corresponding rotor-side three-phase modulations wave and net side three-phase tune
Wave processed, in which:
The rotor-side three-phase modulations wave is for controlling rotor-side converter, so that double-fed wind power generator rotor side current transformer pair
The inertia response characteristic and droop characteristic of similar synchronous generator is presented in outer embodiment voltage source characteristic, control generator output
Power tracking optimal power curve；
The net side three-phase modulations wave surveys current transformer, stable DC busbar voltage for controlling net, so that doubly-fed wind turbine
Net is surveyed current transformer and is run according to unity power factor, and the inertia response characteristic of similar synchronous generator is presented；
The control that active power, reactive power are carried out to rotor-side converter, generates corresponding rotor-side three-phase modulations wave, wraps
It includes:
Revolving speed by tracking doubly-fed wind turbine obtains the maximum power P of the doubly-fed wind turbineopt；
According to the maximum power PoptObtain the slippage angle θ of doubly-fed wind turbineslip；According to the doubly-fed wind turbine
Slippage angle θslipGenerate rotor-side three-phase modulations wave.
2. doubly-fed wind turbine virtual synchronous control method according to claim 1, which is characterized in that net side unsteady flow
Device carries out the control of active power, reactive power, generates corresponding net side three-phase modulations wave, comprising:
Using the difference of DC bus-bar voltage given value and actual value as the input value of pi regulator, the output of the pi regulator
Value surveys virtual synchronous generator mechanical torque T for netm_GSC；
According to the virtual synchronous generator mechanical torque Tm_GSCIt obtains net and surveys modulating wave phase angle θGSC；
Net is surveyed to the given reactive power Q of current transformerg *The reactive power Q of current transformer is surveyed with netgDifference as pi regulator
Input value, the output valve of the pi regulator are net side three-phase modulations wave amplitude Emag_GSC, pass through net side three-phase modulations wave amplitude
Emag_GSCModulating wave phase angle θ is surveyed to netGSCAnd preset phase shift values carry out sine operation, export net side three-phase modulations wave
Amplitude, to form net side three-phase modulations wave.
3. doubly-fed wind turbine virtual synchronous control method according to claim 1, which is characterized in that it is described by with
The revolving speed of track doubly-fed wind turbine obtains the maximum power P of the doubly-fed wind turbineopt, comprising:
Pass through the rotational speed omega of doubly-fed wind turbine described in maximal power tracing MPPT module tracksr, sent out by the double-fed wind-force
The rotational speed omega of motorrObtain maximum power Popt。
4. doubly-fed wind turbine virtual synchronous control method according to claim 1, which is characterized in that described according to institute
State maximum power PoptObtain the slippage angle θ of doubly-fed wind turbineslip, comprising:
According to doubly-fed wind turbine grid entry point given frequency f*Passing through sagging amplification coefficient with the difference of the frequency f of reality output is
KpEnhanced processing after, the peak power output P with the doubly-fed wind turbineoptAddition obtains modified maximum work output
Rate Poptref；
By the modified peak power output PoptrefHypothetical rotor electricity is obtained by the mechanical gyrator equation of synchronous generator
Angle obtains slippage angle θ after subtracting each other the hypothetical rotor electrical angle and double-fed wind power generator rotor angleslip；Wherein, together
The mechanical gyrator equation for walking generator is as follows:
In formula: TmAnd TeRespectively machine torque and electromagnetic torque；ω and ωnIt is practical angular rate and specified electric angle speed respectively
Degree；DpFor damped coefficient；J is the rotor moment of inertia of synchronous generator.
5. doubly-fed wind turbine virtual synchronous control method according to claim 1, which is characterized in that described according to institute
State the slippage angle θ of doubly-fed wind turbineslipGenerate rotor-side three-phase modulations wave, comprising:
By grid entry point given voltage Us *With grid entry point voltage UsInput value of the difference as pi regulator, the pi regulator
Output valve is rotor-side three-phase modulations wave amplitude Emag_RSC, pass through rotor-side three-phase modulations wave amplitude Emag_RSCTo the double-fed wind
The slippage angle θ of power generatorslipAnd preset phase shift values carry out sine operation, output rotor side three-phase modulations wave amplitude
Value, to form rotor-side three-phase modulations wave.
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| CN109193768B (en) * | 2018-09-19 | 2019-12-13 | 清华大学 | Virtual synchronous machine control method and device of wind power generation system |
| CN109217366B (en) * | 2018-09-26 | 2020-07-28 | 上海交通大学 | Full-power wind turbine generator control method and system |
| CN110380451B (en) * | 2019-06-24 | 2021-08-24 | 上海交通大学 | Double-fed wind turbine generator with active inertia response capability |
| CN111769593A (en) * | 2020-06-19 | 2020-10-13 | 上海交通大学 | Wind power plant simulation system, simulation method and simulation equipment for double-fed wind turbine generator |
| CN111969649B (en) * | 2020-08-03 | 2021-11-02 | 华中科技大学 | Control method and system for improving power transmission limit of double-fed fan in weak grid |
| CN112436558B (en) * | 2020-12-14 | 2022-09-16 | 山东大学 | Method and system for controlling virtual synchronous excitation magnetic field of doubly-fed fan |
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