CN108512255A - DFIG dynamic response characteristics analysis method under Voltage Drop failure - Google Patents
DFIG dynamic response characteristics analysis method under Voltage Drop failure Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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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
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Abstract
The invention discloses DFIG dynamic response characteristic analysis methods under a kind of Voltage Drop failure, belong to electric power system transient stability field.This method had both included common DFIG Electric dynamic response process principle analysis, while also including wind turbine mechanical dynamic response process principle analysis.Mechanical dynamic response process principle analysis includes establishing Aerodynamics Model, shafting model and award setting model and mechanical response process analysis procedure analysis；Electric dynamic response process principle analysis includes establishing double fed induction generators model, the principle analysis of rotor-side Frequency Converter Control, the analysis of low voltage crossing Special controlling and electrical response process analysis procedure analysis.DFIG dynamic response characteristics analysis method can more accurately react the fault transient process of double-fed wind turbine when the Voltage Drop failure that the present invention designs, and have universality.
Description
Technical field
The present invention relates to DFIG dynamic response characteristic analysis methods under a kind of Voltage Drop failure, belong to electrical power system transient
Stablize field, DFIG refers to double-fed wind generator machine, the entitled Doubly Fed Induction Gernerator of English.
Technical background
With the reduction of resources reserve, the decline of environmental quality, developing and using clean reproducible energy becomes mainstream, wherein
Wind energy is the high-quality green energy resource of most development prospect, and wind power technology just improved step by step in recent years, and wind energy utilization obtains
Quick development, installed capacity are growing.Double feed wind power generator is by required frequency inverter capacity is small, may be implemented to become
The advantages that fast constant frequency and decoupled active and reactive control becomes most popular type in Wind turbines a few days ago.However DFIG's is excellent
Point also results in its difference between conventional generator, is impacted to the stability of power grid, is mainly manifested in electric network fault feelings
The difference of its Electric dynamic response characteristic under condition；Meanwhile the low capacity current transformer Ability of Resisting Disturbance of DFIG is relatively weak, therefore electricity
Net failure is affected to DFIG, needs to pay close attention to its mechanical dynamic response characteristic under grid fault conditions.In the event of a variety of power grids
In barrier, voltage dip is the most common, studies under network voltage rapid drawdown, the mechanical response and electrical response process of Wind turbines are to double
Feedback type wind-driven generator stability of grid connection has far reaching significance.
From existing research, it can be seen that the low-voltage control of model, wind turbine used by the degree of Voltage Drop, wind turbine
Strategy, and operation level in stable state will all influence response characteristic of the wind turbine in failure process.And it is existing research it is more
Analysis inquire into Electric dynamic response process, concern wind turbine on grid stability influence it is more, have ignored mechanical dynamic and responded
Journey.It is therefore desirable to design DFIG dynamic response characteristics under a kind of Voltage Drop failure including wind turbine mechanical dynamic response process
Analysis method.
Invention content
Technical problem to be solved by the invention is to provide DFIG dynamic response characteristics under a kind of Voltage Drop fault condition
Analysis method, the analysis method had both included that common DFIG Electric dynamic response processes are analyzed, while also being moved including wind turbine machinery
State response process is analyzed.
The technical solution of invention is as follows：
DFIG dynamic response characteristic analysis methods under a kind of Voltage Drop fault condition, DFIG dynamic response characteristic methods include machine
Tool Some principles are analyzed and electric part principle analysis.
Wherein,
（1）Mechanical part principle analysis
The mechanical part of Wind turbines is mainly made of wind energy conversion system, shafting and award setting, and wind energy conversion system completes catching for wind energy
The kinetic energy for being converted into rotation is caught, shafting then completes transmission effect of the mechanical energy from wind energy conversion system to generator, and award setting is then
Realize that quickly tracking changed power maintains stable effect, the response of mechanical part dynamic characteristic be mainly reflected in rotor speed,
In these amounts of wind turbine rotating speed, propeller pitch angle and mechanical output, the dynamic response process of entire mechanical part is relatively slow, tool
Body is described below.
1）Aerodynamics Model
The element that capture wind energy is translated into kinetic energy is the blade of Wind turbines, can be described by the mathematical model of following formula：
(1)
In formula：It is the wind energy conversion system mechanical work for the energy conversion representative that Wind turbines obtain from wind；Represent atmospheric density；
Draught fan impeller radius is represented,Represent tip speed ratio；Represent propeller pitch angle；Represent the rotating speed of wind turbine impeller；Represent wind
The wind energy conversion efficiency coefficient of machine；Represent equivalent wind speed.
From model as above it is found that the mechanical output of wind turbine output is by propeller pitch angle, wind speedAnd wind energy conversion system rotating speed
Influence.In steady-state operation, wind speedCentainly, fan operation is in maximum power point, and rotating speed optimal power is maximum at this time, but
When a failure occurs it since torque imbalance can cause, wind turbine rotating speed increases, according to formula (1) it can be seen that mechanical output output
It will reduce, and be conducive to maintain to stablize.
2）Shafting model
Shafting realizes the function that the mechanical output that wind energy conversion system captures is transmitted to generator, in steady-state analysis, since electromechanics solves
The effect of coupling and frequency converter can filter out the torsional oscillation of shafting, generally use simple substance block models.But in power grid seriously event
Under barrier, the oscillation of shafting cannot be ignored, therefore wind energy conversion system detailed model is mostly used during transient analysis, use mesh herein
Preceding two popular quality models describe the dynamic characteristic of machine driven system shafting, and mathematical model indicates as follows：
(2)
In formula：SubscriptWithRespectively represent be wind energy conversion system and generator parameter；Represent inertia time constant；Rotor
Rotating speed,For synchronous rotational speed；For the stiffness coefficient of axis；Represent damped coefficient；It is relative angular displacement between two mass；WithRespectively represent the electromagnetic torque of wind energy conversion system machine torque and generator.
It is obtained according to above-mentioned model analysis, during short trouble occurs,Increase can be vibrated, andHardly send out
Raw oscillation is in slow increase tendency.
3）Award setting model
Award setting is used for realizing that limiting wind turbine mechanical output under maximal power tracing and high wind speed maintains under stable situation
Specified operation prevents wind turbine over-speed operation.Its principle is mainly in the model for used wind energy conversion system, and propeller pitch angle increases, output work
The principle that rate reduces.Use for reference this thought, be used under grid fault conditions, the power that wind turbine is sent out under fault condition by
Limit, the torque disequilibrium that causes rotor to be subject to and accelerate, in order to maintain its stabilization, need quickly to reduce the mechanical output sent out
Reduce imbalance power, can be realized by the increase of propeller pitch angle.
There are mainly two types of conventional award settings, and one kind is adjusted by active power of output, and one is pass through rotor
Rotating speed is adjusted, but is be compared measured value with the maximum value being previously set.This method can be very fast under high wind speed
Propeller pitch angle is adjusted, regulation power is uneven；But at low wind speeds, when rotor speed is much smaller than rated speed, then propeller pitch angle control
System, which is failure to actuate, is unfavorable for the balance of power.Therefore, measured value is compared with the reference value under corresponding wind speed herein, it in this way can be with
The adjusting that quick propeller pitch angle action is conducive to power is carried out under any wind speed, the fast denaturation in view of electrical quantity is unfavorable for pitch
The stability contorting at angle, herein selection measure rotor speed and are controlled, control block diagram such as Fig. 1.
Its process controlled is to monitor generator speed firstWith the reference rotation velocity under this wind speedIt compares, greatly
The output of Yu Shi, PI adjusterMore than zero, award setting starts at this time, adjustsSize；Less than when,Output is
Zero, award setting system is failure to actuate,Control is at 0 °.
4）Mechanical response process analysis procedure analysis
Degree torque degree of unbalancedness caused by Voltage Drop level of each parameter variation of mechanical part determines that Voltage Drop is got over
Deep, mechanical output differs bigger with electromagnetic power, and each parameter variation is bigger.
When short trouble, which occurs, for power grid leads to Voltage Drop, active power conveying is obstructed, and machine torque and electromagnetism are caused
The imbalance of torque causes spinner velocityIncrease, according to two mass shafting modular forms (1), analysis obtainsWind will be surrounded
Machine speed oscillation changes, rotation speed of fanIt is continuously increased；Variation, makes itself and reference rotation velocityIt generates difference and makes pitch
Angle control action, and propeller pitch angle is controlled according to size of the differenceIncrease；According toAnd wind energy conversion system rotating speedChange feelings
Condition, by formula (2) it is found that output mechanical powerReduce；Variation can further influence shafting system, lead to torque angle、
、It is further change in, affects one another down always, after failure removal, it is extensive that rotor-side frequency converter quickly controls active power
It is multiple.
（2）Electric part principle analysis
Electric part includes mainly the spy under generator model, rotor-side converter and its Controlling model and low voltage condition
Different control strategy, generator model are the key elements for realizing energy converting between mechanical, and rotor-side converter and its control are to realize
The key component of decoupled active and reactive, the Special controlling strategy under low voltage condition be ensure power grid in case of a fault not by
The important method of secondary pulse.The response of electric part dynamic characteristic be mainly reflected in active power, reactive power, voltage and
In these amounts of electric current, the dynamic response process of entire electric part is relatively fast, for simplifying the analysis, does not consider that net becomes herein
Side current transformer and the power of rotor output.It is specifically described as follows：
1）Double fed induction generators model
Double fed induction generators DFIG is to be connected with three-phase alternating-current supply in its rotor loop better than common asynchronous machine place, turn
Sub- voltageWithIt is not 0, and the active power that DFIG is sent out can be controlled with reactive power by adjusting rotor-exciting
System.Due to the DFIG mathematical models under two-phase synchronous rotating frame, dq axis is perpendicular to one another, and no magnetic coupling, form is simplified,
Convenient for the design of controller.Its model is as follows：
Electric moter voltage equation
(3)
(4)
In formula：It indicates synchronous rotational speed, is exactly the speed of coordinate system rotation；Indicate slippage angular speed；、、Indicate winding
Voltage, electric current and magnetic linkage；Indicate the resistance of winding；Subscript、The amount of stator, rotor is indicated respectively；Subscript、Respectively
It indicatesAxis,Axis component.
Flux linkage equations：
(5)
(6)
In formula：、、Between the self-induction and rotor that respectively represent stator winding under synchronous coordinate system, rotor windings
Equivalent mutual inductance.
The active power instantaneously sent out and the reactive power difference of stator are as follows：
(7)
2）Rotor-side Frequency Converter Control principle
Herein in order to reach the decoupling control of active power and reactive power, vector control method that double fed induction generators are selected
It is stator voltage vector oriented, that is to say, that the direction vector of stator voltage and synchronous coordinate systemAxis is identical, then,.Have ignored the electromagnetic transient of network, the pressure drop on stator resistance.At this time double-fed have an effect generator voltage formula (3),
Magnetic linkage formula (5) can be simplified as：
(8)
(9)
Substitution equation (7) can obtain active reactive power and the relationship of electric current is as follows:
(10)
By formula (10) as can be seen that control rotor currentThe active power of output can be changed, controlledIt can change defeated
The reactive power gone out,、It is orthogonal, coupled relation is not present, it is achieved that the decoupling control of active reactive.
3）Low voltage crossing Special controlling
When in order to reduce electric network fault, wind turbine self-protection and off-grid forms the secondary injury to power grid, therefore it is required that wind turbine have
There are low voltage failure ride-through capability, i.e., the wind turbine continuous service in failure process, while reactive power support electricity is provided for power grid
The recovery of pressure, however due to the limitation of rotor-side variable frequency device overcurrent, it needs to take special method to ensure that its is without damage.This
It invents the control of used models coupling low voltage crossing (Low Voltage Ride Through, LVRT) current transformer and increases
Add two methods of crow bar resistance crowbar, makes every effort to DFIG during reaching low-voltage and be protected and play optimal effectiveness.
In grid collapses, electric current is uprushed, and to lead to flow through rotor-side electric current excessive, when being more than permissible value, turns to safeguard
Sub- frequency converter is not burned out, and the crow bar resistance crowbar for being mounted in rotor-side at this time plays a role, its rotor loop of short circuit allowed
Electric current is flowed through from bypass, while blocked rotor side frequency converter, makes its failure.When crowbar has an effect, DFIG is operated in
Asynchronous fan condition needs system provided a large amount of idle, is adversely affected to the recovery of voltage, need to control thus
The action time of crowbar.Also there is more document both at home and abroad to this respect just research, is found after comprehensive analysis
Crowbar actuation times fix realization be easy as long as selection operation duration properly as long as can not only help frequency converter to hide overcurrent but also can be compared with
It is fast to restore adverse effect of the excitation con-trol reduction to power grid.Taking control strategy herein is, when rotor current reaches the 2 of rated value
Times when, put into crowbar immediately, cut off automatically after acting on 60ms.Under Crowbar controls as shown in Figure 2, by detecting rotor
Size of current is protected to decide whether to put into crowbar.
Low voltage crossing controls
Since crowbar run times are limited, only it is used for escaping temporary over-current, but failure process and is not finished, rotor speed
It is being continuously increased, if do not change original Frequency Converter Control strategy, active help will be will increase by original control strategy
Reduction wind speed is helped, causes electric current in rotor-side variable frequency device to increase, crowbar may be caused and acted again, the stabilization of power grids is unfavorable for
Property；Voltage is supported due to needing to increase idle output during the low voltage crossing of wind turbine, so needing to take new again simultaneously
Control strategy.Therefore, low voltage crossing control strategy is used simultaneously herein, principle is by monitoring network voltage, in electricity
Under net short-circuit conditions, reactive-load compensation is preferentially provided according to falling size cases first, then under the limitation of current transformer maximum current
Watt current is limited, provides nargin for reactive current, Voltage Drop is lower, and reactive current is bigger, and watt current is smaller.Both ensured
Support to power grid, and protect the safety of DFIG.The reactive power and active that rotor-side converter needs when then voltage is relatively low
Value and power reference can be obtained by following formula：
(11)
(12)
In formula：Indicate DFIG set end voltages, and；Indicate the dynamic reactive electricity that DFIG is provided
Stream；Indicate rated current；For the active reference value provided in the case of maximal power tracing.
Its control design case as shown in figure 3, essence be increase voltage detecting link, change the active nothing of original closed-loop control
The reference input value of work(.
4）Electrical response process analysis procedure analysis
The electric dynamic characteristics of DFIG are mainly influenced by excitation con-trol, and with fast denaturation.And the case where excitation con-trol
Horizontal with Voltage Drop, operating status is related.When Voltage Drop is shallower, since wind turbine uses power limitation control strategy, in wind
Exciting current is then controlled to maintain the stabilization of active reactive in the case that speed is constant；And when Voltage Drop is larger, in order to protect
Rotor-side variable frequency device and assist fault recovery, special strategy can be taken, according to fall situation take LVRT current transformers control and
Using crow bar resistance crowbar.
During crowbar is acted, DFIG operates in asynchronous machine state, then idle is 0, and whether active reduction acts
It is related with fan operation state before Voltage Drop level and short circuit；After LVRT strategies, wind turbine output reactive power, it is active into
One step is restricted, and value size is related with Voltage Drop level.
After fault clearance, rotor-side variable frequency device restores normal original control strategy, according to power limitation control, by active recovery
It is compensated to the part of original power level, prime mover undercapacity by rotor kinetic energy, therefore recovery process is quickly；And due to encouraging
Magnet rate adjusts to ensure the constant of rotor field rotating speed, therefore active stable output is not with mechanical torque oscillation；It is idle then
Output is 0.
Voltage Drop level can be divided into four kinds of situations according to the control of current transformer：Voltage Drop is shallower, general u>0.9,
Without LVRT current transformer control strategies, crowbar is failure to actuate；Voltage Drop is slightly deep, and 0.2<u<0.9, carry out LVRT current transformers
Control strategy, crowbar are failure to actuate；Voltage Drop is deeper, and 0.2<u<0.9, carry out LVRT current transformer control strategies, crowbar
Action；Voltage Drop is dangerous, u<0.2, in order to protect wind turbine then to take the machine of cutting.
Compared with the conventional method, the present invention has the following advantages and beneficial effect：
DFIG dynamic response characteristic analysis methods under existing Voltage Drop failure generally only focus on the electrical of analysis double-fed wind turbine
Dynamic response process, or concern wind turbine are more on grid stability influence, have ignored mechanical dynamic response process.And it is of the invention
The DFIG dynamic response characteristics analysis method of use had both included Electric dynamic response process, while also including that wind turbine mechanical dynamic is rung
Process is answered, the transient process of the wind turbine in the system failure can be more accurately described.
Description of the drawings
Fig. 1 is award setting figure；
Fig. 2 is Crowbar control figures；
Fig. 3 is low voltage crossing control figure；
Fig. 4 is rated power operation, DFIG mechanical response process schematics；
Fig. 5 is rated power operation, DFIG electrical response process schematics；
Fig. 6 runs for small-power, DFIG mechanical response process schematics；
Fig. 7 runs for small-power, DFIG electrical response process schematics.
Specific implementation mode
The present invention constructs DFIG wind power plant analogue systems（It is flat that emulation has been built using DIgSILENT/PowerFactory
Then platform carries out transient emulation）, wind power plant is constituted by the DFIG of 30 2MW and becomes access Infinite bus power system through 20/0.69kV boostings
System, and the depth of Voltage Drop is realized by adjusting the impedance ground of three-phase shortcircuit, respectively operates in specified work(to DFIG
Rate and low-power (20%) two states are analyzed.The present invention is done further in detail below with reference to the drawings and specific embodiments
It describes in detail bright：
Embodiment 1：Rated power operation
It is rated power that when wind speed is more than rated wind speed 11.5m/s, wind turbine, which is contributed, network voltage drops to 92% respectively, 82%,
Dynamic characteristic when 45% rated voltage, three-phase shortcircuit are happened at 0.5s, are cut off after continuing 0.625s, Fig. 4 and Fig. 5 are indicated respectively
Be mechanical response process and electrical response process.
As can be seen from Figure 4 and Figure 5, when Voltage Drop is smaller (0.92p.u), all amounts are adjusted all in accordance with original
There is instruction to be controlled, also special low voltage crossing is not taken to control.
From fig. 4, it can be seen that when Voltage Drop relatively deep (0.2<u<0.9) machinery response process is similar when, and wink occurs for failure
Between, oscillation immediately increases, and does not change at the beginning, increases through starting after a period of time, and angle increases, active reduction；Failure is clear
The moment removed makes an immediate response and starts to reduce, remaining parameter responds over time to be restored before failure, and Voltage Drop
Deeper, reaction is fiercer.
From fig. 5, it can be seen that Voltage Drop degree is different, electrical response process can difference, Voltage Drop be slightly deep
(0.82p.u), the surge of transcient short circuit time circuit is smaller, and not up to 1.5p.u, crowbar are failure to actuate, and directly carries out LVRT current transformers
Control strategy, active power are restricted, and are quickly reduced, and reactive power is sent out, and support voltage restores, and voltage is prominent in transcient short circuit time
Drop is slightly restored in the process, and electric current increases；Voltage Drop is relatively deep (0.45p.u), and the surge of transcient short circuit time circuit is larger, reaches
1.5p.u, crowbar are acted, and frequency converter function, which is limited, not to be acted on, then do not send out idle, active reduction, and electric current increases；
Crowbar is removed, and is carried out LVRT current transformer control strategies, is sent out reactive power, active power is further restricted reduction, small
During crowbar is run, electric current is reduced to the maximum magnitude of permission.Although mechanical part parameter is still being shaken after fault clearance
It swings, and electric part dynamic characteristic fast quick-recovery due to excitation con-trol.
This emulation can be verified to obtain, and the difference of Voltage Drop level can lead to the response characteristic of wind turbine mechanically and electrically
Larger difference is generated, it is related with the control strategy that rotor-side is taken；Mechanical response can be lagged, and electrical response is particularly fast
Speed.
Embodiment 2：Small-power is run
When wind speed is less than rated wind speed 11.5m/s, wind turbine is then operated in maximal power tracing state, and output size is by wind speed
It determines, it is 9m/s to choose wind speed herein, and fan operation is analyzed in 20% nominal output, and network voltage drops to respectively
92%, 82%, 45%, dynamic characteristic when 32% rated voltage, three-phase shortcircuit are happened at 0.5s, are cut off after continuing 0.625s, Fig. 6 and
What Fig. 7 was indicated respectively is mechanical response process and electrical response process.
As can be seen from Figures 6 and 7, when Voltage Drop is smaller, (0.92p.u) all amounts are almost unchanged.From Fig. 6 and
In the comparison of Fig. 3 as can be seen that under different wind conditions, identical Voltage Drop is horizontal, and caused dynamic response process differs
Sample.Voltage Drop is slightly deep (0.92p.u), and the nearly all amount of dynamic response process of mechanical part does not change, the reason is that wind
The active power output of machine is less than the value of restriction, therefore maintains 20% to contribute, torque balance, therefore does not adjust.Voltage Drop compared with
Deep (0.45p.u, 0.32p.u) its variation is similar with process when nominal output, only changing value smaller.
As can be seen that Voltage Drop is slightly shallow (0.92p.u) from Fig. 7 and Fig. 4 comparisons, active power output remains unchanged, and nothing
Work(output size is then only influenced by Voltage Drop degree, and is sent out when high wind speed as no work value；Voltage Drop is deeper
The action situation of (0.45p.u) crowbar depends on the size of current of transcient short circuit time, related with the operating status before short circuit, though
It is acted under right high wind speed, but not operating under low wind speed；Voltage Drop further decreases (0.32p.u), and then crowbar is acted, and
The response process of crowbar action process and LVRT current transformer control strategies is similar in the case of nominal output.Verification obtains, nothing
The compensation of work(power is only related with Voltage Drop level, and velocity wind levels can influence the variation of active power to influence mechanical sound
Process is answered, the action situation of crowbar can be also influenced.
The analogue system built through the invention can obtain, and DFIG dynamics are rung when the Voltage Drop failure that the present invention designs
It answers characteristic analysis method that can more accurately react the fault transient process of double-fed wind turbine, there is universality.
Claims (4)
1. DFIG dynamic response characteristics analysis method under Voltage Drop failure, it is characterised in that：Include the following steps：
（1）Mechanical dynamic response process principle analysis：Aerodynamics Model is established, shafting model is established, establishes propeller pitch angle control
Simulation and mechanical response process analysis procedure analysis；
（2）Electric dynamic response process principle analysis：Establish double fed induction generators model, rotor-side Frequency Converter Control principle point
Analysis, the analysis of low voltage crossing Special controlling and electrical response process analysis procedure analysis.
2. DFIG dynamic response characteristic analysis methods under Voltage Drop failure according to claim 1, it is characterised in that：Institute
The mathematical model for stating Aerodynamics Model is described as：
（1）,
In formula：It is the wind energy conversion system mechanical work for the energy conversion representative that Wind turbines obtain from wind,Atmospheric density is represented,
Draught fan impeller radius is represented,Tip speed ratio is represented,Propeller pitch angle is represented,The rotating speed of wind turbine impeller is represented,Represent wind
The wind energy conversion efficiency coefficient of machine,Represent equivalent wind speed.
3. DFIG dynamic response characteristic analysis methods under Voltage Drop failure according to claim 1, it is characterised in that：Institute
The mathematical model for stating shafting model is described as：
（2）,
In formula：Subscript andRespectively represent be wind energy conversion system and generator parameter,Inertia time constant is represented,Rotor
Rotating speed,For synchronous rotational speed,For the stiffness coefficient of axis,Damped coefficient is represented,It is relative angular displacement between two mass,WithRespectively represent the electromagnetic torque of wind energy conversion system machine torque and generator.
4. DFIG dynamic response characteristic analysis methods under Voltage Drop failure according to claim 1, it is characterised in that：Institute
It is as follows to state double fed induction generators model：
（3）,
（4）,
In formula：It indicates synchronous rotational speed, is exactly the speed of coordinate system rotation,Indicate slippage angular speed,、、Indicate winding
Voltage, electric current and magnetic linkage,Indicate the resistance of winding, subscript、The amount of stator, rotor, subscript are indicated respectively、Respectively
It indicatesAxis,Axis component.
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| CN110460098A (en) * | 2019-08-28 | 2019-11-15 | 华北电力大学（保定） | The double mass shafting stable control methods of wind energy conversion system based on virtual mass block |
| CN116365581A (en) * | 2023-01-16 | 2023-06-30 | 山东大学 | Shafting torsional vibration suppression method and system under fault ride-through of doubly-fed wind turbine generator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460098A (en) * | 2019-08-28 | 2019-11-15 | 华北电力大学（保定） | The double mass shafting stable control methods of wind energy conversion system based on virtual mass block |
| CN110460098B (en) * | 2019-08-28 | 2020-11-06 | 华北电力大学（保定） | Wind turbine dual-mass-block shafting stability control method based on virtual mass block |
| CN116365581A (en) * | 2023-01-16 | 2023-06-30 | 山东大学 | Shafting torsional vibration suppression method and system under fault ride-through of doubly-fed wind turbine generator |
| CN116365581B (en) * | 2023-01-16 | 2024-05-03 | 山东大学 | Shafting torsional vibration suppression method and system under fault ride-through of doubly-fed wind turbine generator |
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