CN102819221B - LVRT Capability of Wind Turbine Generator characteristic associative simulation model and joint simulation method thereof - Google Patents
LVRT Capability of Wind Turbine Generator characteristic associative simulation model and joint simulation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of LVRT Capability of Wind Turbine Generator characteristic associative simulation model and joint simulation method thereof, described associative simulation model is to be mechanical model and electrical model by the decoupling zero of described wind-powered electricity generation unit; Between described mechanical model and electrical model, communicate by socket communication interface. Technical scheme provided by the invention is according to each parts characteristic, model is divided into mechanical model and electrical model two parts, blade, wheel hub, driving-chain and blower fan core controller (main control module) in mechanical model all adopt prototype, its joint simulation method and on-the-spot product 100% coincide, greatly reduce the error that the abstraction process in modeling produces, reduced the workload of wind turbine establishment mould.
Description
Technical field
The present invention relates to electric system simulation and checking field, be specifically related to a kind of LVRT Capability of Wind Turbine Generator characteristic associative simulationModel and joint simulation method thereof.
Background technology
Wind-powered electricity generation develops rapidly in the past ten years, has worldwide become the important part of supply of electric power. In order to carryThe stability of high electrical network, the technical requirement of wind park access electrical network has been formulated in the power system operation commercial city of various countries, and adopts processThe wind turbine model of checking, meets to wind park the degree that interconnection technology specifies and carries out simulation analysis. China was since 2010Rise to the market into Global Wind-energy installed capacity maximum, solved the grid-connected technical problem of large-scale wind power particularly urgent. Based onInternational way in recent years, in order to improve the grid stability of wind-powered electricity generation access, China has put into effect national grid enterprise mark in successionAccurate Q/GDW392-2009 " wind energy turbine set access electric power network technique regulation ", (2010) No. 433 literary composition " wind-powered electricity generation set grid-connections of Bureau of EnergyDetection management Tentative Measures ", standard GB/T/T19963-2011 " wind energy turbine set access power system technology regulation ", to wind turbineGroup and wind farm grid-connectedly proposed specific requirement, has also comprised the electrical model to wind-powered electricity generation unit, the requirement of wind energy turbine set electrical model,Assess this wind park by simulation means and whether there is the desired grid-connected characteristic of interconnection technology regulation.
Blower fan manufacturing market situation is comparatively complicated, nearly more than 80 of complete set manufacturers, and the wind-powered electricity generation unit model of the market mainstream is numerous,Its main parts size configuration is varied, and these have brought very large pressure, " wind turbine generator system low voltage to low voltage crossing testingRide-through capability compliance evaluation way " tentative this pressure of effectively having alleviated. But adopt which kind of means logical more accuratelyCrossing simulating, verifying reflection LVRT Capability of Wind Turbine Generator characteristic is a problem of needing research badly.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of LVRT Capability of Wind Turbine Generator characteristic associative simulation model and associating thereofEmulation mode, the present invention is the impact on blower fan low voltage crossing characteristic according to the each critical piece of wind-powered electricity generation unit, takes out wind-powered electricity generation unitMechanical model and electrical model, carry out analytical calculation by associative simulation, and assessment blower fan critical piece changes its low voltage crossingThe impact of performance.
The object of the invention is to adopt following technical proposals to realize:
A kind of LVRT Capability of Wind Turbine Generator characteristic associative simulation model, its improvements are, by the decoupling zero of described wind-powered electricity generation unit areMechanical model and electrical model; Between described mechanical model and electrical model, communicate by socket communication interface.
Wherein, described mechanical model adopts Bladed platform to build, comprise leaf model, wheel hub model, tower cylinder model,Driving-chain model, engine room model, blower fan core controller model and wind speed model;
Described leaf model, wheel hub model, tower cylinder model, driving-chain and engine room model arrange by loading project file;
Described blower fan core controller model utilizes the control module that Bladed provides to arrange, by loading master control dynamic linkThe encapsulation of blower fan core controller model is carried out in storehouse;
Described wind speed model comprises permanent wind speed model, becomes wind speed model and imports historical wind speed model.
Wherein, described electrical model adopts Matlab electrical simulation platform to build, and comprises electric network model, wind-powered electricity generation unit generationMachine model, current transformer model and voltage sag simulation device;
Described electric network model is made up of infinitely great power supply and short-circuit reactance device;
Described voltage sag simulation device comprises short-circuit reactance device, current-limiting reactor and fault generator.
Wherein, the parameter gathering in the time of described electrical model modeling comprises: the electric parameter of wind-powered electricity generation set generator, transformerShort in electric parameter, the actual short-circuit reactance device that carries out low voltage crossing test and current-limiting reactor resistance value and electric network modelAppearance of a street amount.
Wherein, the electric parameter of described wind-powered electricity generation set generator comprises generator unit stator impedance, rotor impedance and mutual inductance reactance value;The electric parameter of described transformer comprises excitation resistance and excitation reactance value.
The present invention is based on a kind of LVRT Capability of Wind Turbine Generator characteristic joint simulation method that another object provides, its improvements existIn, described method comprises the steps:
A, initialization mechanical model and electrical model also arrange the emulation end time;
B, start mechanical Model B laded platform emulation and calculate, wait for the communication of Matlab electrical simulation platform and shaking hands;
C, judge the communication whether success of shaking hands;
The independent execution emulation of D, Bladed platform;
E, judge whether emulation exceedes the described emulation end time;
F, beginning associative simulation calculate;
G, Bladed platform start moment and the rotating speed of calculating generator, wait for Matlab electrical model feedback data;
H, Matlab platform obtain moment and the rotary speed instruction of generator, start to carry out electrical model simulation calculation;
After I, electrical model simulation calculation, meritorious to the moment of the generator of reality output and reality and reactive power are fed back to BladedMechanical model;
J, Bladed mechanical model obtain the moment of generator and the feedback of meritorious and reactive power, adjust the moment of generator and turnSpeed, carries out the emulation of next step-length, returns to step e;
K, emulation finish.
Wherein, in described step C, if communication is shaken hands successfully, carry out step e; Otherwise carry out step D.
Wherein, in described step e, if emulation exceedes the described emulation end time, carry out step K; Otherwise carry out step F;The described emulation end time is between 10-20s.
Wherein, after emulation finishes, by all intermediate variables in Bladed platform and Matlab electrical simulation platform and terminationTab phenolphthaleinum goes out, and judges that whether emulation is successful.
Wherein, described intermediate variable comprises generator speed, active power and reactive power; Described final result refers to faultPlace's three-phase voltage and three-phase electricity flow valuve.
Compared with the prior art, the beneficial effect that the present invention reaches is:
1, LVRT Capability of Wind Turbine Generator characteristic associative simulation model provided by the invention, according to each parts characteristic, divides modelFor mechanical model and electrical model two parts, blade, wheel hub, driving-chain and the (master control of blower fan core controller in mechanical modelModule) all adopt prototype, its joint simulation method and on-the-spot product 100% coincide, and greatly reduce the abstract mistake in modelingThe error that journey produces, has reduced wind turbine and has set up the workload of mould.
2, LVRT Capability of Wind Turbine Generator characteristic joint simulation method provided by the invention, replaces certain single parts easily, repaiiesChange parameters of operating part, better for low voltage crossing characteristic (LVRT) assessment, can actual response master control, the factor such as blade is to lowVoltage passes through the impact of characteristic (LVRT) characteristic.
Brief description of the drawings
Fig. 1 is LVRT Capability of Wind Turbine Generator characteristic associative simulation model architecture figure provided by the invention;
Fig. 2 is the workflow diagram of LVRT Capability of Wind Turbine Generator characteristic joint simulation method provided by the invention;
Fig. 3 is that Bladed mechanical model kit form provided by the invention presents figure;
Fig. 4 is that wind speed provided by the invention arranges surface chart;
Fig. 5 is the surface chart that arranges of blower fan core controller provided by the invention;
Fig. 6 is the surface chart that arranges of emulation end time provided by the invention;
Fig. 7 is startup Bladed platform emulation calculating and setting surface chart provided by the invention;
Fig. 8 is the link information schematic diagram of socket communication interface provided by the invention;
Fig. 9 is the correlation curve figure of test data and the emulated data of generator voltage provided by the invention;
Figure 10 is generator active power test data curve map provided by the invention;
Figure 11 is the correlation curve figure of generator active power test data provided by the invention and emulated data average deviation;
Figure 12 is the correlation curve figure of generator active power test data provided by the invention and emulated data mean absolute deviation;
Figure 13 is the correlation curve figure of generator active power test data provided by the invention and emulated data maximum deviation;
Figure 14 is generator reactive testing current data and curves figure provided by the invention;
Figure 15 is the correlation curve figure of generator reactive testing current data provided by the invention and emulated data average deviation;
Figure 16 is the correlation curve figure of generator reactive testing current data provided by the invention and emulated data mean absolute deviation;
Figure 17 is the correlation curve figure of generator reactive testing current data provided by the invention and emulated data maximum deviation;
Figure 18 is generator reactive power test data curve map provided by the invention;
Figure 19 is the correlation curve figure of generator reactive power test data provided by the invention and emulated data average deviation;
Figure 20 is the correlation curve figure of generator reactive power test data provided by the invention and emulated data mean absolute deviation;
Figure 21 is the correlation curve figure of generator reactive power test data provided by the invention and emulated data maximum deviation;
Figure 22 is the dynamic changing curve figure of generator torque instruction provided by the invention;
Figure 23 is that generator torque variation provided by the invention causes active power change curve;
Figure 24 is the change curve of generator speed provided by the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
LVRT Capability of Wind Turbine Generator characteristic associative simulation model provided by the invention, by analyzing the each component function of blower fan and wind-powered electricity generationUnit operation characteristic, is mechanical model and electrical model by wind turbine model decoupling zero, mechanical model from fan design angle consider,Use Bladed platform to carry out modeling; Electrical model part is used power system simulation software Matlab electrical simulation platform building,Between two models, use socket communication interface to carry out parameter transmission and time synchronized, complete the associating to running of wind generating set characteristicSimulation calculation. This associative simulation model is realized the simulation in various operating mode leeward group of motors running statuses to wind-powered electricity generation unit accurately.
Mechanical model adopts GHBladed to build, and mechanical model comprises leaf model, wheel hub model, tower cylinder model, biographyMoving chain model, engine room model, blower fan core controller model and wind speed model; Leaf model and tower cylinder model are by loading engineeringThe form of file arranges, thereby carries out the replacing of all kinds blade, can ensure the wind-powered electricity generation unit complete with actual motionCause; Blower fan core controller model utilizes Bladed electrical module function, carries out model with the form that loads master control dynamic link libraryEncapsulation, because dynamic link library is to control software code directly to generate, also keeps in full accord with actual motion blower fan; BladedWind speed model in software has plurality of optional, as permanent wind speed model, change wind speed model and importing historical wind speed model etc.
Electrical characteristic in the normal operation of electrical model simulation calculation blower fan and voltage falling process, adopts Matlab electrical simulation flatPlatform is built, and electrical model comprises electric network model, generator model, current transformer model and be used for emulation low voltage crossing mistakeThe voltage sag simulation device of journey.
Described electric network model comprises infinitely great power supply and short-circuit reactance device; Voltage sag simulation device comprises short-circuit reactance device, current limlitingReactor and fault generator.
The parameter gathering in the time of described electrical model modeling comprises: the electric parameter of wind-powered electricity generation set generator, the electric ginseng of transformerCapacity of short circuit in several, actual short-circuit reactance device and current-limiting reactor resistance value and the electric network model that carries out low voltage crossing test;The electric parameter of wind-powered electricity generation set generator comprises generator unit stator impedance, rotor impedance and mutual inductance reactance value; The electric ginseng of transformerNumber comprises excitation resistance and excitation reactance value.
Socket communication: when associative simulation between mechanical model and electrical model based on UDPsocket communication, communication interface is to moveThe form of state chained library is called by model, realizes on the one hand the parameter transmission of simulation calculation between mechanical model and electrical model, anotherCarry out on the one hand simulation time synchronous. Between two models, mutual parameter comprises generator torque, rotating speed, meritorious, low-voltagePass through flag bit and simulation time etc.
LVRT Capability of Wind Turbine Generator characteristic associative simulation model architecture provided by the invention as shown in Figure 1. Wherein, generator mouldThe mechanical part of type and electric part are placed on respectively in two models, by the mechanical property of blower fan mechanical model calculating generator, byThe electrical characteristic of electrical model calculating generator, and by communication interface by two Unified Models.
Wind-powered electricity generation unit adopts different blades, master control system, pitch-controlled system, generator and current transformer all by the operation spy to blower fanProperty exerts an influence, and changes flexibly the model of single part by the method for associative simulation, and assessment single part parameter changes wholeThe impact of fan operation characteristic, has very important for research running of wind generating set characteristic and LVRT Capability of Wind Turbine Generator characteristicEffect.
The workflow of LVRT Capability of Wind Turbine Generator characteristic joint simulation method provided by the invention as shown in Figure 2, described methodComprise the steps:
A, initialization mechanical model and electrical model also arrange the emulation end time;
B, start mechanical Model B laded platform emulation and calculate, wait for the communication of Matlab electrical simulation platform and shaking hands;
C, judge the communication whether success of shaking hands; If communication is shaken hands successfully, carry out step e; Otherwise carry out step D.
The independent execution emulation of D, Bladed platform;
E, judge whether emulation exceedes the described emulation end time; If emulation exceedes the described emulation end time, carry out step K;Otherwise carry out step F; The described emulation end time is between 10-20s.
F, beginning associative simulation calculate; Associative simulation calculating refers to Bladed platform and enters together with Matlab electrical simulation platformThe emulation of row;
Moment and the rotating speed of G, Bladed platform calculating generator, wait for Matlab electrical model feedback data;
H, Matlab electrical simulation platform obtain moment and the rotary speed instruction of generator, start to carry out electrical model simulation calculation;
After I, electrical model simulation calculation, meritorious to the moment of the generator of reality output and reality and reactive power are fed back to BladedMechanical model;
J, Bladed mechanical model obtain the moment of generator and the feedback of meritorious and reactive power, adjust the moment of generator and turnSpeed, carries out the emulation of next step-length, returns to step e;
K, emulation finish.
After emulation finishes, all intermediate variables in Bladed platform and Matlab electrical simulation platform and final result are derived,For researching and analysing, judge that whether emulation is successful; Intermediate variable comprises generator speed, active power and reactive power; InstituteState final result and refer to fault place three-phase voltage and three-phase electricity flow valuve.
Embodiment
One, first carry out model importing and setting, point Bladed mechanical model and Matlab electrical model two parts carry out:
I, mechanical model be by leaf model, wheel hub model, tower cylinder model, driving-chain model, engine room model, core controller withAnd wind speed model composition. Each model presents with following kit form in Bladed above. As shown in Figure 3.
In a, mechanical model, leaf model, wheel hub model, tower cylinder model, driving-chain model and engine room model can be by loadingProject file arranges, and for each complete machine producer, in Bladed, the related information such as blade, wheel hub is all windMachine design parameter, associative simulation model provided by the invention can ensure to coincide with actual motion blower fan 100%, has ensured blower fan machineryThe reliability of model, has significantly reduced the difficulty to blower fan mechanical model abstract modeling;
B, wind speed model can be according to emulation needs, are set as constant speed wind model, also can load dynamically by being written into wind speed allocation listWind speed model, simulates the wind regime of Practical on-site test as far as possible. Wind speed arranges interface as shown in Figure 4:
The control module that c, core controller can provide by Bladed arranges, as shown in Figure 5. The master control logic of blower fanCode encapsulates and produces dynamic link library, uses, when the master control system of wind-powered electricity generation unit becomes in the main control module of BladedWhen change, this dynamic link library is replaced to modeling again.
In II, electrical model, except the electrical model that comprises generator, current transformer is built, also need to set up electric network model,And voltage sag simulation device model. When modeling, need gather the electric parameter of wind-powered electricity generation set generator, frequency converter, gather blower fanArrive the also connection transformer parameter of site, gather actual short-circuit reactance device and the current-limiting reactor impedance of carrying out low voltage crossing testValue, and the capacity of short circuit of electrical network.
Two, model carries out simulation calculation after having set up:
1) first simulation time is set, as shown in Figure 6. Revise according to demand the emulation end time parameter in the Simulation Control page,Control the total duration of emulation.
2) start Bladed transient emulation, as shown in Figure 7. Select the PowerProductionLoading in the Simulations pageFunction power loading is calculated, and selects the deposit position of simulation result. Beginning simulation calculation after setting completes, as shown in Figure 8,The link information of socket interface is printed in Bladed interface first.
3) after communication interface is shaken hands successfully, start the electrical model emulation of Matlab, the interactive access that starts associative simulation calculates.Treat that emulation finishes, and checks data.
Three, to simulation result comparative analysis:
Choose certain wind-powered electricity generation unit, the result that this method associative simulation is calculated is carried out contrast verification, and checking curve is as Fig. 9-21Shown in, be voltage, active power, reactive current and the reactive power test data curve map of generator successively, and generatorActive power, reactive current and reactive power test data and emulated data average deviation, mean absolute deviation, maximum deviationCorrelation curve. Test data and emulated data average deviation, mean absolute deviation, maximum deviation unit are p.u. (perunit value).
According to wind-powered electricity generation unit electrical model validation criteria, can intuitively find to adopt joint simulation method to carry out simulation calculation by comparison diagramData result, be much better than the standard of modelling verification with the data error of field measurement, embodied good simulated effect.
In addition, joint simulation method can significant reaction master control system etc. changes the impact on low voltage crossing characteristic (LVRT),Figure 22 has reacted the dynamic change of torque instruction; Figure 23 has reacted torque variation and has caused active power to change; Figure 24 has embodiedThe variation of motor speed.
A kind of associative simulation model and joint simulation method thereof of assessing LVRT Capability of Wind Turbine Generator characteristic provided by the invention, rootImpact according to the each critical piece of wind-powered electricity generation unit on blower fan low voltage crossing characteristic, takes out wind-powered electricity generation unit mechanical model and electrical model,Carry out analytical calculation by associative simulation, assessment blower fan critical piece changes the impact on its low voltage crossing performance. Associative simulationMethod and on-the-spot product 100% coincide, and greatly reduce the error that the abstraction process in modeling produces, and have reduced wind turbine and have set up mouldWorkload.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although referenceAbove-described embodiment has been described in detail the present invention, and those of ordinary skill in the field are to be understood that: still can be to thisInvention detailed description of the invention modify or be equal to replacement, and do not depart from spirit and scope of the invention any amendment or etc.With replacing, it all should be encompassed in the middle of claim scope of the present invention.
Claims (1)
1. a LVRT Capability of Wind Turbine Generator characteristic joint simulation method, is characterized in that, described method comprises the steps:
A, initialization mechanical model and electrical model also arrange the emulation end time;
B, start mechanical Model B laded platform emulation and calculate, wait for the communication of Matlab electrical simulation platform and shaking hands;
C, judge the communication whether success of shaking hands;
The independent execution emulation of D, Bladed platform;
E, judge whether emulation exceedes the described emulation end time;
F, beginning associative simulation calculate;
G, Bladed platform start moment and the rotating speed of calculating generator, wait for the electrical model feedback data of Matlab platform;
H, Matlab platform obtain moment and the rotary speed instruction of generator, start to carry out electrical model simulation calculation;
The moment of the generator of after I, electrical model simulation calculation, reality being exported and actual active power and reactive power feed back toThe mechanical model of Bladed platform;
The mechanical model of J, Bladed platform obtains the moment of generator and the feedback of active power and reactive power, adjusts generatorMoment and rotating speed, carry out the emulation of next step-length, return to step e;
K, emulation finish;
In described step C, if communication is shaken hands successfully, carry out step e; Otherwise carry out step D;
In described step e, if emulation exceedes the described emulation end time, carry out step K; Otherwise carry out step F; Described imitativeThe true end time is between 10-20s;
After emulation finishes, all intermediate variables in Bladed platform and Matlab electrical simulation platform and final result are derived,Judge that whether emulation is successful;
Described intermediate variable comprises generator speed, active power and reactive power; Described final result refers to fault place three-phaseVoltage and three-phase electricity flow valuve;
Described method adopts LVRT Capability of Wind Turbine Generator characteristic associative simulation model realization, is machinery by the decoupling zero of described wind-powered electricity generation unitModel and electrical model; Between described mechanical model and electrical model, communicate by socket communication interface;
Described mechanical model adopts Bladed platform to build, and comprises leaf model, wheel hub model, tower cylinder model, driving-chainModel, engine room model, blower fan core controller model and wind speed model;
Described leaf model, wheel hub model, tower cylinder model, driving-chain model and engine room model are established by loading project filePut;
The control module that described blower fan core controller model utilizes Bladed platform to provide arranges, dynamic by loading master controlChained library carries out the encapsulation of blower fan core controller model;
Described wind speed model comprises permanent wind speed model, becomes wind speed model and imports historical wind speed model;
Described electrical model adopts Matlab electrical simulation platform to build, comprise electric network model, wind-powered electricity generation unit generator model,Current transformer model and voltage sag simulation device;
Described electric network model is made up of infinitely great power supply and short-circuit reactance device;
Described voltage sag simulation device comprises short-circuit reactance device, current-limiting reactor and fault generator;
The parameter gathering in the time of described electrical model modeling comprises: the electric parameter of wind-powered electricity generation set generator, the electric ginseng of transformerShort in several, the actual short-circuit reactance device resistance value that carries out low voltage crossing test and current-limiting reactor resistance value and electric network modelAppearance of a street amount;
The electric parameter of described wind-powered electricity generation set generator comprises generator unit stator impedance, rotor impedance and mutual inductance reactance value; Described changeThe electric parameter of depressor comprises excitation resistance and excitation reactance value.
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