CN204118736U - A kind of double-fed wind power generator group Physical Simulation Platform based on CompactRIO - Google Patents
A kind of double-fed wind power generator group Physical Simulation Platform based on CompactRIO Download PDFInfo
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- CN204118736U CN204118736U CN201420586937.7U CN201420586937U CN204118736U CN 204118736 U CN204118736 U CN 204118736U CN 201420586937 U CN201420586937 U CN 201420586937U CN 204118736 U CN204118736 U CN 204118736U
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Abstract
The utility model discloses a kind of double-fed wind power generator group Physical Simulation Platform based on CompactRIO, comprise wind energy conversion system analogue means, double-fed generator, grid-connected switch, voltage falling generator, back-to-back converter, Crowbar protective circuit, absolute value encoder, CompactRIO controller and monitoring computer; Each parts are connected respectively, form double-fed wind power generator group Physical Simulation Platform performance loop.This Physical Simulation Platform possesses the ability of the high speed of wind power generation simulation system, real-time computing and control, the requirement that wind generator system control algolithm complexity improves constantly can be met, and compact conformation, maintain easily, be convenient to do not have the researcher of hardware identification code programming experience to carry out the physical simulation test research of relevant problem especially, to verify the theoretical applicability in actual physics model of various wind power generation control algolithm, there is great meaning to the research of wind power generation.
Description
Technical field
The utility model belongs to wind power generation control field, relates to a kind of double-fed wind power generator group Physical Simulation Platform, especially a kind of a kind of double-fed wind power generator group Physical Simulation Platform based on CompactRIO.
Background technology
Wind-powered electricity generation is as the topmost transition form of wind energy, and development in recent years is very rapid, but a series of power grid security problems that intrinsic randomness, fluctuation and the intermittence of wind-powered electricity generation causes are also following.Obviously how guaranteeing that wind turbine generator keeps working safely and steadly and how realizing fault traversing when electric network fault under various operating mode is one of important channel solved the problem.Around above-mentioned problem, scientific research personnel proposes much new control algolithm, although the control effects of these control algolithms have passed the Digital Simulation of computer, also needs to be tested by physical simulation experiment or field experiment.But the experiment of actual wind field investment is huge, very high to the dependence of natural environment, and experimental period is long, a large amount of theoretical research result is caused all to rest on the Digital Simulation stage, therefore set up wind turbine generator Physical Simulation Platform in laboratory, have extremely important meaning to the conversion of wind power generation control technology theoretical result.
Modernism electric control theory of algorithm emerges in an endless stream, its common feature is Mathematical Modeling more complicated, therefore as the Physical Simulation Platform for checking control algolithm theory, hardware must have arithmetic speed and reconfigurable, extensibility faster, to adapt to the requirement of various algorithm to hardware; Software should have code programming feature easy to learn, to alleviate the workload that researcher's control routine is write, promote the conversion of theoretical result.For the research of double-fed wind power generator group Physical Simulation Platform, domestic scholars proposes a lot of implementation, mainly comprises:
It is a kind of wind power generation experimental rig being driven double-fed generator and synchronous generator by AC asynchronous motor disclosed in " wind power generation experimental rig " (application number 201110164404.0), wherein AC asynchronous motor emulation wind turbine characteristic, double-fed generator and synchronous generator are as wind-driven generator, do not relate to AC asynchronous motor, double-fed generator and synchronous generator machine controller, direct current machine emulation wind turbine is adopted with this patent, only use double feedback electric engine as wind-driven generator, all different as the experimental rig of controller with utilization CompactRIO, a kind of low pressure-middle pressure wind power generation simulation experiment platform disclosed in " low pressure-middle pressure wind power generation simulation experiment platform " (application number 201210173899.8), comprise middle pressure asynchronous machine and control system thereof and double fed asynchronous machine and control system thereof, during work, two machines can by arbitrary emulation wind turbine, and another machine is as generator operation, this patent does not relate to the software and hardware of controller, direct current machine emulation wind turbine is only used with this patent, only use double feedback electric engine as wind-driven generator, with utilization CompactRIO as controller and adopt LabVIEW graphical programming mode all different, it is the Wind Generation Research platform based on brushless double feed generator disclosed in " wind power generation simulation experiment platform " (application number 200810220069.X), employing frequency converter described in this patent regulates prime mover (asynchronous machine) emulation wind turbine, adopt brushless dual-feed motor wind-driven generator simulation and its control system, direct current machine emulation wind turbine is adopted with this patent, double feedback electric engine emulation wind turbine, and use CompactRIO all different as controller.
It is the double-fed wind generating analog platform based on DSP disclosed in " a kind of experimental simulation system of variable speed constant frequency dual feed wind generator " (application number 200510086939.5), directly driving or double-fed wind generating analogue system based on PLC disclosed in " a kind of wind-powered electricity generation laboratory simulation control method and device thereof " (application number 201210104957.1), a kind of asynchronous machine based on DSP and double feedback electric engine wind power generation analog platform disclosed in " a kind of wind power generation analog platform and analogy method thereof " (application number 201210174298.9), based on microprocessor (PLC disclosed in " a kind of wind power generation simulation system based on double-fed generator " (application number 201010147802.7), PCC or single-chip microcomputer) the analogue system of wind power generation of double-fed generator, it is a kind of double-fed generator simulator stand controlled based on DSP disclosed in " a kind of double-fed generator simulator stand " (application number 200920248191.8), a kind of based on the laboratory wind-power generating variable flow control device of PLC as main control system disclosed in " laboratory wind-power generating variable flow control device " (application number 201120232748.6), these patents are all wind power generation analog control system based on DSP or other MCU or platform, all different from the wind power generation analog platform based on CompactRIO controller described in this patent.
The above patent is that the double-fed wind power generator group Physical Simulation Platform of representative generally adopts DSP, single-chip microcomputer, PCC or PLC as the control core of controller, wherein, the code of the former two is write very complicated and hardware and is difficult to require to reconfigure according to algorithms of different, and general theory researcher is difficult to complete arithmetic programming or hardware reconstruction in a short time; Although and the code of the latter two is write simply, its arithmetic speed is difficult to the requirement meeting modern control algorithms.To sum up, the difficulty of field test and the deficiency of Physical Simulation Platform are the one of the main reasons that theoretical results a large amount of at present only rests on the Digital Simulation stage.Therefore develop and a kind ofly have that control routine programming is simple, hardware double-fed wind power generator group Physical Simulation Platform that is reconfigurable, core controller fast operation is the physical simulation workload alleviating scientific research personnel, the effective way of the conversion rate of accelerator theory achievement.
Summary of the invention
The purpose of this utility model is for above-mentioned wind-driven generator experimental system for simulating Shortcomings, proposes a kind of double-fed wind power generator group Physical Simulation Platform based on CompactRIO hardware platform and LabVIEW graphical programming software.This Physical Simulation Platform is mainly used in, in laboratory environments by graphic programming modeling wind field, wind energy conversion system and wind-driven generator, carrying out wind turbine generator Control release, verifies the theoretical applicability in actual physics model of various wind power generation control algolithm.CompactRIO hardware platform is embedded reconfigurable fpga chip, modular construction makes each unit module to be directly connected with the transducer of control system, can expand for the hardware of different control algolithms to equipment or reconfigure, greatly reduce the design time of researcher's hardware circuit.LabVIEW software through pictures platform greatly simplifies the complexity of control program design, save the time that researcher writes control routine, this patterned control program makes researcher to carry out checking to control routine as required more easily and to revise, and the introducing of FPGA makes the arithmetic speed of system and the real-time of control obtain very large raising, physical simulation test can be realized better.
To achieve these goals, the utility model have employed following technical scheme:
Based on a double-fed wind power generator group Physical Simulation Platform of CompactRIO, comprise wind energy conversion system analogue means, double-fed generator, grid-connected switch, voltage falling generator, back-to-back converter, Crowbar protective circuit, absolute value encoder, CompactRIO controller and monitoring computer; Described wind energy conversion system analogue means is coaxially connected with double-fed generator, absolute value encoder respectively by shaft coupling; The stator winding of described double-fed generator is connected with one end of grid-connected switch, and the other end of grid-connected switch is connected with the output line terminal U ' of voltage falling generator, V ', W '; Input wiring terminal A, B, C, N of described voltage falling generator are connected with input terminal U, V, W, N of electrical network respectively; The rotor windings of described double-fed generator is directly connected with the rotor-side of Crowbar protective circuit, back-to-back converter respectively; After the grid side series reactor X of described back-to-back converter, become T with excitation
1be connected, excitation becomes T
1output line terminal U ', the V ' of the other end and voltage falling generator, W ' be connected; Described grid-connected switch both sides are provided with voltage transformer pt 1, PT2 and Current Transmit 1, CT2, and the secondary side signal line end of voltage transformer pt 1, PT2 summation current transformer CT1, CT2 is connected with the A/D module of CompactRIO controller through analog signals conditioning module respectively; Described monitoring computer is connected with CompactRIO controller by netting twine;
Described wind energy conversion system analogue means becomes T primarily of DC motor M, rectification
2, rectifier bridge DB1 and copped wave pipe VT1 forms; Civil power becomes T through rectification
2be connected with the ac terminal of rectifier bridge DB1, the direct current output plus terminal of rectifier bridge DB1 is connected with one end of the armature winding of DC motor M through copped wave pipe VT1, the other end of the armature winding of DC motor M is connected with the negative terminal of rectifier bridge DB1, the armature winding two ends continued flow tube VD in parallel of DC motor M; The excitation winding series limiting resistor R of DC motor M
1be connected with the positive and negative end of rectifier bridge DB1 respectively afterwards, the armature circuit and energized circuit of DC motor M are equiped with Hall current sensor, and the output of Hall current sensor is connected with the A/D module of CompactRIO controller;
Described back-to-back converter comprises by insulated gate bipolar transistor G
1~ G
6composition rotor-side converter and by insulated gate bipolar transistor S
1~ S
6the net side converter of composition; Described net side converter and rotor-side converter link together through DC side bus; Shunt capacitor C on described DC side bus, and the DC side bus of described back-to-back converter installs Hall current sensor and Hall voltage transducer respectively; Described net side converter and the every cross streams leading-out terminal of rotor-side converter are provided with Hall current sensor; The output signal end of described Hall current sensor, Hall voltage transducer is all connected with the A/D module of CompactRIO controller;
Described Crowbar protective circuit is primarily of rectifier bridge DB2, copped wave current limiting tube VT2 and bypass resistance R
2composition; The described AC terminal of rectifier bridge DB2 is connected with the rotor windings of double-fed generator, the direct current terminals of rectifier bridge DB2 and bypass resistance R2, copped wave current limiting tube VT2 form controlled discharge loop, and be equiped with Hall current sensor on controlled discharge loop, the output of Hall current sensor is connected with the A/D module of CompactRIO controller;
Described CompactRIO controller comprises the CompactRIO support of built-in high speed polycaryon processor and FPGA, support is provided with general DI/DO module, high speed DO module and A/D module; Described high speed DO module respectively with the copped wave current limiting tube VT2 of copped wave pipe VT1, Crowbar protective circuit, the insulated gate bipolar transistor G of back-to-back converter of wind energy conversion system analogue means
1~ G
6, S
1~ S
6grid be connected; Described A/D module is connected with the transducer of each measurement point of platform, analog signals conditioning module output respectively.
The high-speed computation that double-fed wind power generator group Physical Simulation Platform based on CompactRIO of the present utility model possesses wind power generation simulation system, the ability controlled in real time, can meet the requirement that wind-powered electricity generation electricity generation system control algolithm complexity improves constantly; CompactRIO has good extensibility, patterned programming mode and man-machine interaction, can greatly improve model-code transformation efficiency; The analog quantity that this platform collection is abundant, can simulating wind power generation system normally run and the operating mode of fault; This platform structure is compact, maintains easily, and is convenient to research, test that researcher carries out relevant problem especially, verifies the theoretical applicability in actual physics model of various wind power generation control algolithm, has great meaning to the research of wind power generation.
In the utility model, the flow direction because of electric current can be two-way, therefore the output line terminal of above-mentioned voltage falling generator refers to the side that can heighten or turn down, the side of input wiring terminal then finger electrical network.
Further illustrate as of the present utility model, above-described wind energy conversion system analogue means exports pwm pulse control signal by CompactRIO controller, and drive copped wave pipe VT1, and then control DC motor M Driving Torque, emulation wind turbine runs.
Further illustrate as of the present utility model, above-described back-to-back converter exports 12 road pwm pulse control signals by CompactRIO controller, drives insulated gate bipolar transistor G
1~ G
6, S
1~ S
6, and then realize the uneoupled control of double-fed generator active power and reactive power.
Further illustrate as of the present utility model, the breaking-closing operating of above-described grid-connected switch is controlled by CompactRIO controller.
Further illustrate as of the present utility model, above-described voltage falling generator comprises 1 three-phase automatic coupling voltage regulator and 2 A.C. contactors KM1, KM2; Input wiring terminal A, B, C, N of described three-phase automatic coupling voltage regulator receive input terminal U, V, W, N of electrical network respectively; 1,3,5 binding posts of described A.C. contactor KM1 are connected with input wiring terminal A, B, C of three-phase regulator respectively, and 2,4,6 binding posts are connected to output line terminal U ', V ', the W ' of voltage falling generator respectively; 1,3,5 binding posts of described A.C. contactor KM2 are connected with transformation contact a, b, c of three-phase automatic coupling voltage regulator, and output line terminal U ', V ', the W ' of 2,4,6 binding posts and voltage falling generator are connected.
Further illustrate as of the present utility model, above-described three-phase automatic coupling voltage regulator is a kind of voltage regulator of independent pressure regulation of being often on good terms, and manually can regulate separately the output voltage of a, b, c three-phase.
Further illustrate as of the present utility model, above-described A.C. contactor KM1 and A.C. contactor KM2 interlocks control by CompactRIO controller by programming realization, and when generator normally generates electricity by way of merging two or more grid systems, KM1 action closes, and KM2 disconnects; When simulating grid symmetry and asymmetric low-voltage accident, KM1 disconnects, and KM2 action closes.
Further illustrate as of the present utility model, the general DI/DO module of above-described CompactRIO controller is connected with the signal output terminal of the absolute value encoder of wind power generation simulation system, measures rotating speed and the position of doubly-fed generation machine rotor.
Further illustrate as of the present utility model, the real-time control routine of above-described CompactRIO controller inside adopts LabVIEW Real-Time pattern development software programming.
Further illustrate as of the present utility model, the monitor code of above-described monitoring computer adopts pattern development software LabVIEW to carry out configuration programming.
Further illustrate as of the present utility model, the above grid-connected switch is an A.C. contactor.Described back-to-back converter is made up of (i.e. rotor-side converter and net side converter) two three phase rectifier/inverters, connected by the DC side bus of band shunt capacitance between the two, rectifying part is identical with the major loop structure of Converting Unit, all adopt inner containing 6 IGBT, anti-parallel diodes and circuits for triggering three-phase IPM module.IPM(Intelligent Power Module), i.e. Intelligent Power Module, not only integrates device for power switching and drive circuit.But also inside is integrated with overvoltage, overcurrent and the failure detector circuit such as overheated, and detection signal can be delivered to CPU.It is made up of the tube core of high-speed low-power-consumption and the gate drive circuit of optimization and fast protection circuit.Even if there is load accident situation or improper use, also can ensure that IPM self is not damaged.
Further illustrate as of the present utility model, the A/D module of the above CompactRIO controller is connected with Hall voltage/current sensor output, and the signal of collection comprises stator three-phase voltage and electric current U
as, U
bs, U
cs, I
as, I
bs, I
cs, system three-phase voltage and electric current U
a, U
b, U
c,
a, I
b, I
c, current transformer net side three-phase voltage and electric current V
ag, V
bg, V
cg, I
ag, I
bg, I
cg, current transformer rotor-side three-phase voltage and electric current V
ar, V
br, V
cr, I
ar, I
br, I
cr, I
d, current transformer DC bus-bar voltage and electric current V
dc, I
d, DC motor excitation and armature supply and armature voltage I
f, I
a, the electric current I of Crowbar protective circuit
cB.
Operation principle of the present utility model:
Described wind energy conversion system analogue means selects DC motor as the analog machine of wind energy conversion system.Structure is as above-mentioned, and wherein DC motor M is analog machine, and its exciting current keeps constant, and the control of torque realizes by regulating armature voltage.Line voltage becomes T through rectification
2and supply motor excitation winding and armature winding respectively after three-phase commutation bridge DB1 rectification, namely the DC power supply that rectifier bridge DB1 exports shared by excitation winding and armature winding.For obtaining suitable constant excitation megnet electric current, the resistance that series connection one is suitable in energized circuit makes exciting current equal rated value, and in order to realize the direct torque of DC motor, the copped wave pipe VT1 that connects in armature circuit carries out chopper control control to direct voltage.CompactRIO controller calculates current torque by the exciting current of given wind speed and the rotor speed that detects and DC motor M, armature supply, then exports PWM waveform and carries out chop control to the VT1 of armature circuit thus realize the control of motor torque; Exciting current IF, the armature supply IA signal of the DC motor M involved by control send the A/D module of CompactRIO controller to gather after Hall current sensor isolation, and the rotating speed of rotor and position signalling are gathered from absolute value encoder output port by the two-way DI/DO module of CompactRIO controller.
Described Crowbar protective circuit is when symmetrical or asymmetric low voltage failure appear in electrical network; PWM waveform is exported by the high speed DO module of CompactRIO controller; break-make control is carried out to copped wave current limiting tube VT2; the energy of rotor is discharged from bypass resistance R2; thus the overvoltage of the overcurrent of restrict rotor side and the DC side of back-to-back converter, the low voltage crossing realizing double-fed generator while protection back-to-back converter controls.
Described double-fed generator is the control object of this emulation platform.The dynamic simulator system of this platform is become the formants such as T1, CompactRIO controller formed by double-fed generator, back-to-back converter, excitation.The stator of double-fed generator is connected with electrical network through grid-connected switch, voltage falling generator, and the AC-DC-AC system that rotor-side consists of back-to-back converter is connected with electrical network.The back-to-back converter be made up of two three-phase IPM modules is the excitation con-trol unit of generator, is also the part of the motor-driven die device most critical of speed-varying frequency constant dual feedback wind power generation.Back-to-back converter subnetting side converter (S1 ~ S6) and rotor-side converter (G1 ~ G6) two parts, under different rotating speeds, they are operated in inversion or rectification state respectively.For coupling rotor voltage, the interchange end of net side converter is connected with electrical network by excitation transformer, DC side then with the DC side parallel of rotor-side converter.The main task of net side converter is the voltage stabilization maintaining current transformer DC side; Adopt PQ decoupling control policy, net side converter can realize the PQ four quadrant running of AC side of converter, when rotor metasynchronism speed is run, be operated in rectification state, exciting power and slip power is provided to rotor, when the supersynchronous speed of rotor is run, be operated in the slip power that rotor exports by inverter mode and be sent to electrical network through excitation change.Also can exchange reactive power according to electrical network to the demand of reactive power and electrical network, but be generally reduction Converter Capacity and operate in unity power factor state.The DC side of rotor-side converter and the DC side parallel of grid side current transformer, its AC is connected with the rotor windings of double-fed generator.Main task is for double-fed generator provides the exciting current of suitable amplitude and frequency, realizes the distribution of reactive power between the stability contorting of generator terminal voltage and parallel running unit, realizes most strong wind powerinjected method etc.Its operation principle: automatically determine exciting current frequency and phase sequence according to net frequency and rotating speed time unloaded, follow the tracks of line voltage, send grid-connected pulse after meeting grid-connected conditions, be connected to the grid double-fed generator generating; Realize maximum wind power extract by control algolithm after grid-connected to control.The control core of back-to-back converter adopts CompactRIO controller, its FPGA kernel embedded make to measure and controlling functions very complete, can meet the computing requirement of high speed, complexity, Large Copacity control algolithm.For realizing various different control algolithm, need the service data gathering each point in electricity generation system, these measurement points adopt except absolute value encoder except rotor-position and tachometric survey, the Hall voltage all adopted, current sensor.Analog signals after transducer isolation and conditioning is directly delivered to CompactRIO controller and is carried out surveying and calculating.CompactRIO controller, according to after control algolithm analytical calculation, exports the IGBT that pwm control signal triggers net side, rotor-side converter respectively, provides ac excitation power supply to double-fed generator.
Three-phase automatic coupling voltage regulator in described voltage falling generator is the voltage regulator that a kind of every phase tap can regulate separately, by regulating the tap of the every phase winding of three-phase automatic coupling voltage regulator, size and the degree of asymmetry of Voltage Drop can be set, thus carry out low voltage crossing Control release.A.C. contactor KM1 and A.C. contactor KM2 interlocks control by CompactRIO controller by programming realization, and when generator normally generates electricity by way of merging two or more grid systems, KM1 action closes, and KM2 disconnects; When simulating grid symmetry and asymmetric low-voltage accident, KM1 disconnects, and KM2 action closes; Based on voltage falling generator, researcher can carry out the confirmatory experiment of low voltage crossing control algolithm.
Described monitoring computer is Monitor Computer Control System, and programming language and powerful Data Management Analysis and network communications capability realize carrying out monitoring and controlling to the running status of whole emulation platform all parts flexibly to utilize virtual instrument.Its main hardware is constructed as follows, monitoring computer is an industrial computer having installed LabVIEW graphical programming software, on computers, the telecommunication with CompactRIO can be realized by LabVIEW programming, thus realize data acquisition, display, control command the good in interactive function such as to issue.The another one object of configuration Monitor Computer Control System may be used for comparing with the result of digital simulation by the data of this system acquisition, so that researcher makes objective judge to the correctness of control algolithm and control effects.
Advantage of the present utility model:
1. the high speed of the FPGA system that the CompactRIO controller box of this platform is embedded, make it compared with traditional DSP control system, almost do not respond time delay, can gather data very at high speed, analyze and calculation process, the demand of the Control experiment of high complexity can be met.
2. the CompactRIO controller of this platform, the parts such as erasable FPGA cabinet can be repeated form by conventional data I/O module, high speed DO module, signal sampling A/D module, real-time processor and program, system can be expanded or reprovision hardware module according to different requirements, possess good hardware expanding and reprovision, the hardware requirement that increase and control complexity because of item controlled improve constantly can be met.
3. the systems soft ware part of this platform adopts LabVIEW development environment, its patterned author language enormously simplify the complexity of control program design, user can carry out writing of LabVIEW program according to its control algolithm easily and revise, code transformation efficiency is high, accelerates the conversion rate of theoretical result.
4. the voltage falling generator that possesses of this platform, can arbitrarily simulating grid symmetrical and asymmetric low-voltage accident time, the operating condition of double-fed wind generating, verifies the control effects of low voltage crossing control algolithm.
5. analog quantity is enriched in this platform collection, can meet the physical simulation demand of the control algolithm of various dual feedback wind power generation system.
Accompanying drawing explanation
Fig. 1 is the overall construction drawing of the utility model one embodiment.
Fig. 2 is the structural representation of voltage falling generator in the utility model one embodiment.
In FIG, 1-wind energy conversion system analogue means, 2-double-fed generator, the grid-connected switch of 3-, 4-voltage falling generator, 5-back-to-back converter, 6-Crowbar protective circuit, 7-absolute value encoder, 8-CompactRIO controller, 9-monitoring computer.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated, but protection range of the present utility model is not only confined to following examples.
Embodiment 1:
As shown in Figure 1, based on a double-fed wind power generator group Physical Simulation Platform of CompactRIO, comprise wind energy conversion system analogue means 1, double-fed generator 2, grid-connected switch 3, voltage falling generator 4, back-to-back converter 5, Crowbar protective circuit 6, absolute value encoder 7, CompactRIO controller 8 and monitoring computer 9; Described wind energy conversion system analogue means 1 is coaxially connected with double-fed generator 2, absolute value encoder 7 respectively by shaft coupling; The stator winding of described double-fed generator 2 is connected with one end of grid-connected switch 3, and the other end of grid-connected switch 3 is connected with output line terminal U ', the V ' of voltage falling generator 4, W '; Input wiring terminal A, B, C, N of described voltage falling generator 4 are connected with input terminal U, V, W, N of electrical network respectively; The rotor windings of described double-fed generator 2 is directly connected with the rotor-side of Crowbar protective circuit 6, back-to-back converter 5 respectively; After the grid side series reactor X of described back-to-back converter 5, become T with excitation
1be connected, excitation becomes T
1output line terminal U ', the V ' of the other end and voltage falling generator 4, W ' be connected; Described grid-connected switch 3 both sides are provided with voltage transformer pt 1, PT2 and Current Transmit 1, CT2, and the secondary side signal line end of voltage transformer pt 1, PT2 summation current transformer CT1, CT2 is connected with the A/D module of CompactRIO controller 8 through analog signals conditioning module respectively; Described monitoring computer 9 is connected with CompactRIO controller 8 by netting twine;
Described wind energy conversion system analogue means 1 becomes T primarily of DC motor M, rectification
2, rectifier bridge DB1 and copped wave pipe VT1 forms; Civil power becomes T through rectification
2be connected with the ac terminal of rectifier bridge DB1, the direct current output plus terminal of rectifier bridge DB1 is connected with one end of the armature winding of DC motor M through copped wave pipe VT1, and the other end of the armature winding of DC motor M is connected with the negative terminal of rectifier bridge DB1; The excitation winding series limiting resistor R of DC motor M
1be connected with the positive and negative end of rectifier bridge DB1 respectively afterwards, the armature circuit and energized circuit of DC motor M are equiped with Hall current sensor, and the output of Hall current sensor is connected with the A/D module of CompactRIO controller 8;
Described back-to-back converter 5 comprises by insulated gate bipolar transistor G
1~ G
6composition rotor-side converter and by insulated gate bipolar transistor S
1~ S
6the net side converter of composition; Described net side converter and rotor-side converter link together through DC side bus; Shunt capacitor C on described DC side bus, and the DC side bus of described back-to-back converter 5 installs Hall current sensor and Hall voltage transducer respectively; Described net side converter and the every cross streams leading-out terminal of rotor-side converter are provided with Hall current sensor; The output signal end of described Hall current sensor, Hall voltage transducer is all connected with the A/D module of CompactRIO controller 8;
Described Crowbar protective circuit 6 is primarily of rectifier bridge DB2, copped wave current limiting tube VT2 and bypass resistance R
2composition; The AC terminal of described rectifier bridge DB2 is connected with the rotor windings of double-fed generator 2, the direct current terminals of rectifier bridge DB2 and bypass resistance R2, copped wave current limiting tube VT2 form controlled discharge loop, and be equiped with Hall current sensor on controlled discharge loop, the output of Hall current sensor is connected with the A/D module of CompactRIO controller 8;
Described CompactRIO controller 8 comprises the CompactRIO support of built-in high speed polycaryon processor and FPGA, support is provided with general DI/DO module, high speed DO module and A/D module; Described high speed DO module respectively with the copped wave current limiting tube VT2 of copped wave pipe VT1, Crowbar protective circuit 6, the insulated gate bipolar transistor G of back-to-back converter 5 of wind energy conversion system analogue means 1
1~ G
6, S
1~ S
6grid be connected; Described A/D module is connected with the transducer of each measurement point of platform, analog signals conditioning module output respectively.
Described voltage falling generator 4 comprises 1 three-phase automatic coupling voltage regulator and 2 A.C. contactors KM1, KM2; Input wiring terminal A, B, C, N of described three-phase automatic coupling voltage regulator receive input terminal U, V, W, N of electrical network respectively; 1,3,5 binding posts of described A.C. contactor KM1 are connected with input wiring terminal A, B, C of three-phase regulator respectively, and 2,4,6 binding posts are connected to output line terminal U ', V ', the W ' of voltage falling generator 4 respectively; 1,3,5 binding posts of described A.C. contactor KM2 are connected with transformation contact a, b, c of three-phase automatic coupling voltage regulator, and output line terminal U ', V ', the W ' of 2,4,6 binding posts and voltage falling generator 4 are connected.Described three-phase automatic coupling voltage regulator is a kind of voltage regulator of independent pressure regulation of being often on good terms, and manually can regulate separately the output voltage of a, b, c three-phase.Described A.C. contactor KM1 and A.C. contactor KM2 interlocks control by CompactRIO controller 8 by programming realization, and when generator normally generates electricity by way of merging two or more grid systems, KM1 action closes, and KM2 disconnects; When simulating grid symmetry and asymmetric low-voltage accident, KM1 disconnects, and KM2 action closes.
The general DI/DO module of described CompactRIO controller 8 is connected with the signal output terminal of the absolute value encoder 7 of wind power generation simulation system, measures rotating speed and the position of double-fed generator 2 rotor.
In the present embodiment, described wind energy conversion system analogue means 1 exports pwm pulse control signal by CompactRIO controller 8, and drive copped wave pipe VT1, and then control DC motor M Driving Torque, emulation wind turbine runs.Described back-to-back converter 5 exports 12 road pwm pulse control signals by CompactRIO controller 8, drives insulated gate bipolar transistor G
1~ G
6, S
1~ S
6, and then realize the uneoupled control of double-fed generator active power and reactive power.The breaking-closing operating of described grid-connected switch 3 is controlled by CompactRIO controller 8.The real-time control routine of described CompactRIO controller 8 inside adopts LabVIEW Real-Time pattern development software programming.The monitor code of described monitoring computer 9 adopts pattern development software LabVIEW to carry out configuration programming.
The experimental implementation of the present embodiment:
Wind energy conversion system control algolithm and double-fed generator control algolithm are converted into patterned Labview program language form, and be downloaded in CompactRIO controller 8, researcher can be sent instructions for 9 times by monitoring computer and carry out various experimental implementation, is below experimental implementation specific embodiment:
1. wind energy conversion system Control release: start-up command received by CompactRIO controller 8, after given wind speed reaches starting wind velocity, control wind energy conversion system analogue means 1 according to given wind speed and generating unit speed and export corresponding torque, the data collected by monitoring computer and waveform and the result of digital simulation are compared, the control effects of checking wind energy conversion system control algolithm.
2. double-fed generator Lai control of: after wind energy conversion system analogue means 1 starts, when rotating speed meets or exceeds 70% of synchronous speed, by CompactRIO controller, back-to-back converter 5 is controlled, the ac excitation power supply of frequency, amplitude, phase-adjustable is provided to the three-phase rotor windings of double-fed generator 2, realize the constant frequency under speed change, Isobarically Control, verify the control effects of various control algolithm.
3. double-fed generator idle grid connection controls: after pressure is built in excitation, monitoring computer 9 issues grid-connected instruction, CompactRIO controller 8 changes the exciting current of double-fed generator 2 according to the amplitude of the line voltage detected, frequency, phase adjusted back-to-back converter 5, make the amplitude of set end voltage with line voltage of doubly fed machine 2, frequency, phase place consistent, and sending switching signal to grid-connected switch 3, the flexibility realizing double-fed generator 2 is grid-connected.Cutting-in control experiment can detect the control effects of the various cutting-in control algorithms in metasynchronism and supersynchronous operation area.
4. the optimal control experiment under double-fed generator rated wind speed: after generator connecting in parallel with system, when wind speed is within the scope of rated wind speed, verifies the most strong wind power capture control effects of various control algolithm.
5. low voltage crossing Control release: after double-fed generator 2 generates electricity by way of merging two or more grid systems, can by a, b, c sliding tap of adjustment voltage falling generator 4, simulating grid voltage symmetry or asymmetricly fall fault, tests various control algolithm and pass through control effects in low voltage failure.
Claims (10)
1. based on a double-fed wind power generator group Physical Simulation Platform of CompactRIO, it is characterized in that: comprise wind energy conversion system analogue means (1), double-fed generator (2), grid-connected switch (3), voltage falling generator (4), back-to-back converter (5), Crowbar protective circuit (6), absolute value encoder (7), CompactRIO controller (8) and monitoring computer (9); Described wind energy conversion system analogue means (1) is coaxially connected with double-fed generator (2), absolute value encoder (7) respectively by shaft coupling; The stator winding of described double-fed generator (2) is connected with one end of grid-connected switch (3), and the other end of grid-connected switch (3) is connected with output line terminal U ', the V ' of voltage falling generator (4), W '; Input wiring terminal A, B, C, N of described voltage falling generator (4) are connected with input terminal U, V, W, N of electrical network respectively; The rotor windings of described double-fed generator (2) is directly connected with the rotor-side of Crowbar protective circuit (6), back-to-back converter (5) respectively; After the grid side series reactor X of described back-to-back converter (5), become T with excitation
1be connected, excitation becomes T
1output line terminal U ', the V ' of the other end and voltage falling generator (4), W ' be connected; Described grid-connected switch (3) both sides are provided with voltage transformer pt 1, PT2 and Current Transmit 1, CT2, and the secondary side signal line end of voltage transformer pt 1, PT2 summation current transformer CT1, CT2 is connected through the A/D module of analog signals conditioning module with CompactRIO controller (8) respectively; Described monitoring computer (9) is connected with CompactRIO controller (8) by netting twine;
Described wind energy conversion system analogue means (1) becomes T primarily of DC motor M, rectification
2, rectifier bridge DB1, continued flow tube VD and copped wave pipe VT1 form; Civil power becomes T through rectification
2be connected with the ac terminal of rectifier bridge DB1, the direct current output plus terminal of rectifier bridge DB1 is connected with one end of the armature winding of DC motor M through copped wave pipe VT1, the other end of the armature winding of DC motor M is connected with the negative terminal of rectifier bridge DB1, the armature winding two ends continued flow tube VD in parallel of DC motor M; The excitation winding series limiting resistor R of DC motor M
1be connected with the positive and negative end of rectifier bridge DB1 respectively afterwards, the armature circuit and energized circuit of DC motor M are equiped with Hall current sensor, and the output of Hall current sensor is connected with the A/D module of CompactRIO controller (8);
Described back-to-back converter (5) comprises by insulated gate bipolar transistor G
1~ G
6composition rotor-side converter and by insulated gate bipolar transistor S
1~ S
6the net side converter of composition; Described net side converter and rotor-side converter link together through DC side bus; Shunt capacitor C on described DC side bus, and the DC side bus of described back-to-back converter (5) installs Hall current sensor and Hall voltage transducer respectively; Described net side converter and the every cross streams leading-out terminal of rotor-side converter are provided with Hall current sensor; The output signal end of described Hall current sensor, Hall voltage transducer is all connected with the A/D module of CompactRIO controller (8);
Described Crowbar protective circuit (6) is primarily of rectifier bridge DB2, copped wave current limiting tube VT2 and bypass resistance R
2composition; The AC terminal of described rectifier bridge DB2 is connected with the rotor windings of double-fed generator (2), the direct current terminals of rectifier bridge DB2 and bypass resistance R2, copped wave current limiting tube VT2 form controlled discharge loop, and be equiped with Hall current sensor on controlled discharge loop, the output of Hall current sensor is connected with the A/D module of CompactRIO controller (8);
Described CompactRIO controller (8) comprises the CompactRIO support of built-in high speed polycaryon processor and FPGA, support is provided with general DI/DO module, high speed DO module and A/D module; Described high speed DO module respectively with the copped wave current limiting tube VT2 of copped wave pipe VT1, Crowbar protective circuit (6) of wind energy conversion system analogue means (1), the insulated gate bipolar transistor G of back-to-back converter (5)
1~ G
6, S
1~ S
6grid be connected; Described A/D module is connected with the transducer of each measurement point of platform, analog signals conditioning module output respectively.
2. the double-fed wind power generator group Physical Simulation Platform based on CompactRIO according to claim 1, it is characterized in that: described wind energy conversion system analogue means (1) exports pwm pulse control signal by CompactRIO controller (8), drive copped wave pipe VT1, and then controlling DC motor M Driving Torque, emulation wind turbine runs.
3. the double-fed wind power generator group Physical Simulation Platform based on CompactRIO according to claim 1, it is characterized in that: described back-to-back converter (5) exports 12 road pwm pulse control signals by CompactRIO controller (8), drive insulated gate bipolar transistor G
1~ G
6, S
1~ S
6, and then realize the uneoupled control of double-fed generator active power and reactive power.
4. the double-fed wind power generator group Physical Simulation Platform based on CompactRIO according to claim 1, is characterized in that: the breaking-closing operating of described grid-connected switch (3) is controlled by CompactRIO controller (8).
5. the double-fed wind power generator group Physical Simulation Platform based on CompactRIO according to claim 1, is characterized in that: described voltage falling generator (4) comprises 1 three-phase automatic coupling voltage regulator and 2 A.C. contactors KM1, KM2; Input wiring terminal A, B, C, N of described three-phase automatic coupling voltage regulator receive input terminal U, V, W, N of electrical network respectively; 1,3,5 binding posts of described A.C. contactor KM1 are connected with input wiring terminal A, B, C of three-phase regulator respectively, and 2,4,6 binding posts are connected to output line terminal U ', V ', the W ' of voltage falling generator (4) respectively; 1,3,5 binding posts of described A.C. contactor KM2 are connected with transformation contact a, b, c of three-phase automatic coupling voltage regulator, and output line terminal U ', V ', the W ' of 2,4,6 binding posts and voltage falling generator (4) are connected.
6. the double-fed wind power generator group Physical Simulation Platform based on CompactRIO according to claim 5, is characterized in that: described three-phase automatic coupling voltage regulator is a kind of voltage regulator of independent pressure regulation of being often on good terms.
7. the double-fed wind power generator group Physical Simulation Platform based on CompactRIO according to claim 5, it is characterized in that: described A.C. contactor KM1 and A.C. contactor KM2 interlocks control by CompactRIO controller (8) by programming realization, when generator normally generates electricity by way of merging two or more grid systems, KM1 action closes, and KM2 disconnects; When simulating grid symmetry and asymmetric low-voltage accident, KM1 disconnects, and KM2 action closes.
8. the double-fed wind power generator group Physical Simulation Platform based on CompactRIO according to claim 1, it is characterized in that: the general DI/DO module of described CompactRIO controller (8) is connected with the signal output terminal of the absolute value encoder (7) of wind power generation simulation system, measure rotating speed and the position of double-fed generator (2) rotor.
9. according to the arbitrary described double-fed wind power generator group Physical Simulation Platform based on CompactRIO of claim 1-8, it is characterized in that: the real-time control routine employing LabVIEW Real-Time pattern development software programming that described CompactRIO controller (8) is inner.
10. according to the arbitrary described double-fed wind power generator group Physical Simulation Platform based on CompactRIO of claim 1-8, it is characterized in that: the monitor code of described monitoring computer (9) adopts pattern development software LabVIEW to carry out configuration programming.
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| CN201420586937.7U CN204118736U (en) | 2014-10-11 | 2014-10-11 | A kind of double-fed wind power generator group Physical Simulation Platform based on CompactRIO |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283212A (en) * | 2014-10-11 | 2015-01-14 | 广西大学 | Double-fed wind power generation set physical simulation platform based on Compact RIO |
| CN113126518A (en) * | 2020-01-16 | 2021-07-16 | 江苏和网源电气有限公司 | Double-fed fan converter control system test platform |
| CN113126517A (en) * | 2020-01-16 | 2021-07-16 | 江苏和网源电气有限公司 | Low-voltage ride through test platform for direct-drive fan |
-
2014
- 2014-10-11 CN CN201420586937.7U patent/CN204118736U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283212A (en) * | 2014-10-11 | 2015-01-14 | 广西大学 | Double-fed wind power generation set physical simulation platform based on Compact RIO |
| CN113126518A (en) * | 2020-01-16 | 2021-07-16 | 江苏和网源电气有限公司 | Double-fed fan converter control system test platform |
| CN113126517A (en) * | 2020-01-16 | 2021-07-16 | 江苏和网源电气有限公司 | Low-voltage ride through test platform for direct-drive fan |
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