CN101465551B - Generator system with intelligent processing of position signal - Google Patents
Generator system with intelligent processing of position signal Download PDFInfo
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- CN101465551B CN101465551B CN2008101860029A CN200810186002A CN101465551B CN 101465551 B CN101465551 B CN 101465551B CN 2008101860029 A CN2008101860029 A CN 2008101860029A CN 200810186002 A CN200810186002 A CN 200810186002A CN 101465551 B CN101465551 B CN 101465551B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
An electric power generator system capable of processing position sigals intelligently is provided. The system includes a power generator with a rotor, and a position encoder connected to sense angular position of the rotor and to generate a position signal accordingly. A processor receives the position signal, calculates an angular position in response, calculates an estimated angular position based on earlier received position signals, and finally generates a processed angular position based on the calculated angular position and the estimated angular position. This processed angular position is a more reliable measure of the rotor position since it is based on earlier position inputs. This provides a high immunity to short term errors in the position signal, and for e.g. wind turbines this means that normal operation can be maintained in situations where the position encoder temporarily fails, and in case of complete failure, operation can be maintained long enough to avoid emergency shut down.
Description
Technical field
The present invention relates to the field of generator system, for example be used for the generator system of wind energy conversion system.More specifically, the present invention relates to the generator system of intelligent processing of position signal, the position, angle of wherein said position signalling indication generator amature.
Background technology
For the wind energy conversion system that is set to produce to electrical network electrical power, power efficiency is crucial parameter.For high power efficiency is provided, must wind energy conversion system be connected to electrical network with the least possible shutdown (shut down) event.
A kind of known mistake source that makes wind energy conversion system shutdown is the location sensing (sensing) of rotor of power generator or position encoded.For example, two feedback-induced generators need the position, angle of accurate sensing generator amature, for example+/-1 ° within so that control system in the future the electrical power signal of spontaneous motor match electrical network, thereby reliably and reposefully to the electrical network transmission electric power.Owing to high electric current, though the mistake of short-term or also can cause the emergency cutoff of generator system without position signalling, thus cause the overall power efficiency variation of wind energy conversion system.In addition, even the small mistake of position signalling also can cause the undesirable Voltage Peak from generator system, thereby reduction is transported to the quality of the electrical power of electrical network.
The known position sensing apparatus that is commonly referred to position coder finally can produce mistake in the position signalling of its output.In addition, such device is mechanically connected to the axle of generator usually, thereby comprises the parts of speed (for example, 1500rpm or the higher) running with the axle of engine.Therefore, bearing of position coder etc. has the limited life-span, so the problem of earlier detection position coder is extremely important for the damage fully of avoiding position coder, the damage fully of position coder will make the wind energy conversion system shutdown until changed position coder.
Also may be only based on calculating the position, angle of rotor to the electrical output signal of the electrical network of its transmission power from generator and generator.This has eliminated the needs for the mechanical location encoder.Yet such calculating is processing powers complicated and need to be a large amount of.In addition, if the voltage on electrical network is very low, the value of calculating so is insecure, and when line voltage is zero, can not calculate.
Summary of the invention
Therefore, according to foregoing description, one object of the present invention is for providing a kind of electrical power generator system, and it can improve the processing of the position signalling that receives from position coder so that can be with the shutdown quantity that reduces operate generator system more reliably.
In first aspect, the invention provides a kind of electrical power generator system, comprising:
-power generator, it comprises the rotor that is connected to axle;
-position coder, described position coder are configured to come by being mechanically connected to described axle the position, angle of the described rotor of sensing, and produce the position signalling of the position, angle that represents described rotor; And
-processor, it is preferably digital information processing system, and is configured to:
-receive described position signalling from described position coder;
The described position signalling of-response provides the position, angle of the calculating of described rotor;
-position, angle of the estimation of described rotor is provided based on the position signalling of previous reception; And
-based at least a predetermined control algolithm, produce the position, angle of processing from the position, angle of described calculating and the position, angle of described estimation.
Because such generator system has considered that therefore the position, angle of such processing will be more reliable than the position, angle of directly calculating based on a single position signalling from position coder based on the position, angle of processing is provided from the latest position signal of position coder and the position, angle of calculating based on previous Position input.Therefore, the position, angle of described processing is not vulnerable to the impact of the mistake from the position signalling that position coder receives.
Owing to the position, angle of estimating, the mistake in position signalling can be detected and such mistake can also be proofreaied and correct to a certain extent, even in the situation that position coder is out of service in short time interval, also can provide control algolithm, make the position, angle by the estimation within this period that places one's entire reliance upon, the enough normal runnings of holding power generator system reliably in the position, angle of processing.To describe subsequently and calculate and utilize the position, angle of estimating to produce the method more specifically of the position, angle of processing more reliably.
Its power produces function and depends on the generator system that rotor-position is accurately understood, two feedback-induced generators for example, the impact of the position coder mistake that is caused poor power quality or emergency cutoff with less attending the meeting, even and in the situation that the position coder permanent fault, system also will be if having time shutdown and do not need emergency cutoff in a controlled manner.
According to foregoing, being very suitable for wherein according to the generator system of described first aspect, reliable operation and high power efficiency are the wind energy conversion system of key parameter and other power generator.Can reduce to be stopped producing by the wind energy conversion system that the position coder problem causes the duration of electrical power.Because most modern generator system comprises digital signal processor, therefore can come necessity of executing location signal to process by the software that moves on such processor fully.Yet if necessary, described processing or its part can also comprise the simulation process part.
Below, preferred embodiment will be described, especially about the embodiment of described predetermined control algorithm.
Processor can comprise correcting unit, described correcting unit be configured to detect before calculating the position, angle and the correction position signal in the mistake of predefined type, thus the position signalling of expectation carried out pre-filtering, to remove the interim mistake from the known type in the position signalling of position coder.Thus, the angle position signal that calculates based on the position signalling of proofreading and correct becomes more reliable, the generator system shutdown that therefore can avoid the interim mistake by known type to cause.Particularly, pre-stored characteristic (for example, its angular resolution) that can the position-based encoder is come correct errors, utilizes thus the redundant information from the position signalling that position coder receives.Can also come correct errors based on the pre-stored characteristic (for example, the angular acceleration of its maximum possible) of power generator, can refuse value such in position signalling thus, this value reflects physically impossible angular acceleration of specific generator.Mistake in the correction position signal preferably includes one or more in the following step: 1) remove the peak that may be caused by " suspending (the hanging) " position in the numerical portion of electrical noise or system; 2) remove and to be offset by the value that cause one or more " suspension " in the numerical portion of system position; 3) the restriction angular acceleration that surpasses predetermined value that may be caused by various factors; And 4) the compensation unexpected pulse number of rotation weekly that may be caused by interference signal or loss.
Processor preferably includes estimation unit, and this estimation unit comprises that phase-locked loop (PLL) namely comprises the known integrator in this territory and pi regulator, and wherein estimation unit produces based on previous angle Position input the position, angle of estimating.In this mode, use PLL filtering the input angle position, and estimate that thus which position, angle expects, thereby can estimate the reliability of angle positional value.Processor can be configured to, and depends on which is for example estimated is considered to select the most reliably the position, angle with position, angle or estimation to be applied to estimation unit as input.
Predetermined control algolithm is configured such that the position, angle of processing is the output from PLL, and the reliable measurements of the position, angle of being filtered based on previous angle Position input by PLL is provided thus.Particularly, for example constant by the hypothesis rotor velocity by extrapolation algorithm, by the position, angle of the angle position calculation estimation of processing, thereby a leading sample obtains the good estimation of position, angle.
Processor preferably includes the mistake processing unit, described mistake processing unit is configured to based on the comparison the position, angle of position, angle and estimation and detects mistake, wherein is applied to estimation unit as input detecting the position, angle of amiss situation allowance below nominal size fault reason unit selecting to estimate.If do not detect mistake, the angle position signal of selecting to calculate based on up-to-date position signalling input is as the input to estimation unit.In simple embodiment, in the situation that surpassing predetermined value or depart from, the difference between the position, angle of position, angle and estimation surpasses specific percentage, the mistake processing unit detects mistake.Yet, can also use more complicated algorithm or standard for detection of mistake.
In one embodiment, the mistake processing unit is configured to select the position, angle of output estimation as the position, angle of processing in the situation that mistake detected.Preferably, the most reliable value in the position, angle of the position, angle of calculating and estimation is output as the position, angle of processing.Thus, in this embodiment, the mistake processing unit is software switch, and it is not detecting the position, angle that in amiss situation, output is calculated, and in the position, angle of detecting output estimation in amiss situation.
The mistake processing unit can be configured to produce error signal, and there is mistake in this error signal indication in position coder.Such error signal can be used for calling out the attendant that can change position coder, and perhaps, error signal can be by the controlled shutdown of control system use with the starter-generator system.Particularly, detect the mistake of predetermined number during predetermined duration after, the mistake processing unit produces error signal.Therefore, can keep normal running during several interim mistakes, this error signal is delayed time until the mistake of big figure occured within the time that limits.Therefore, the power efficiency of generator system is improved, and also provides margin of safety simultaneously and has not needed emergency cutoff.
Position coder can be the position coder of any type basically, but preferably carries the position coder of electric position signal.Particularly, encoder can be with the form transfer position signal of three line digital position signals, for example, the optical position encoder is carried three line signals with the electric pulse form, wherein two lines provide the pulse corresponding to each partial rotation of rotor, and line provides the pulse (reset signal) corresponding to each integral cycle rotating of rotor.Particularly, with the sampling frequency of 2KHz at least, for example the sampling frequency of 5KHz, also may greater than the sampling frequency of 10KHz, come the sample position signal.
If power generator is two feedback-induced generators, generator system is particularly suitable, because such generator type need to indicate the accurate angle position signal of rotor-position in order to can suitably operate when being connected to electrical network.
Generator system also comprises control system, and this control system is configured to the position, angle of reception ﹠ disposal and controls thus at least one in following: 1) power generator is to the electrical connection of electrical network, and 2) vibration level (level) of power generator.1) in situation, owing to the position, angle of processing reliably, can obtain to have the reliable operation of high power efficiency and high power quality.In the situation that 2), by accurately and the position, angle of processing reliably, can be effectively and the vibration level that stably decays and produced by generator.
Preferably, processor is configured to the mistake in the encoder of detection position and produces thus error signal, and wherein control system is configured to respond the controlled disconnection process of this error signal startup and electrical network.Process by such mistake, even in the situation that position coder damages fully, also can eliminate emergency cutoff.
In second aspect, the invention provides the wind energy conversion system that comprises according to the power generator system of first aspect present invention.Described wind energy conversion system preferably is configured to carry electrical power to electrical network, and the position, angle of wherein processing is used for eliminating the emergency cutoff owing to the mistake of position coder, and is for example, as described in above-mentioned first aspect.
It should be understood that two independent aspects of the present invention can make up mutually, describe the embodiment that is used for first aspect and also go for second aspect.
Description of drawings
Referring now to accompanying drawing, the present invention is described in further detail, in figure:
Fig. 1 example the basic element of character of power generator system;
Fig. 2 example a kind of processor embodiment;
Fig. 3 example another processor embodiment;
Fig. 4 example the 3rd processor embodiment;
Fig. 5 example from the possible mistake in the position signalling of position coder; And
Fig. 6 example be connected to the generator system of electrical network.
The concrete example of accompanying drawing implement method of the present invention, but should not be interpreted as limiting other the possible embodiment in the scope that falls into claims.
Embodiment
Fig. 1 example the basic element of character of generator system.Electrical power generator GEN comprises by shaft-driven rotor.Be used in the generator situation of wind energy conversion system, blade pass is crossed the axle that gear box drives generator GEN.Generator GEN has a plurality of phase places, and each phase place produces the electrical power signal that can be used for electric energy is supplied to electrical network (for example, public electric wire net).Position coder ENC is mechanically connected to generator shaft with the position, angle of sensing rotor, and the position, angle of its rotor is be used to controlling for example important parameter of two feedback-induced generators of polytype generator.
Usually by the coupling than rigidity (stiff), position coder ENC is connected to axle, even thereby position coder ENC also can make bearing wear in position coder ENC with respect to the little misalignment of generator shaft.Typical position coder ENC reads the dish that rotates together with the axis based on optics, dish is divided into the section of black and white by angle ground, and for example, every integral cycle rotating is totally 1024 sections.Optical pickocff is used for deferring to the position signalling PS that passes through to produce impulse form of black and white section.
Then, process position signalling PS by processor DSP (being preferably digital signal processor DSP), it changes position signalling PS into the angle position inherently, this angle position reaction the position, angle of generator amature.Be further processed in processor, so that position, the angle PAP that processes more reliably that obtains for example will be further described below.Particularly, can control generator GEN to the electric coupling of electrical network with position, the angle PAP of such processing, thus, not need shutdown in the situation that exist interim mistake to obtain operation more reliably in position signalling PS.In the situation that position coder ENC paralyses fully, position, the angle PAP of processing inputs based on position signalling PS early, allows thus sufficiently long normal running to avoid emergency cutoff.
The below will describe the different embodiment of processor.
Fig. 2 example the embodiment for the treatment of in accordance with the present invention device DSP.Receive the position signalling PS from position coder in processor DSP, and this position signalling PS is imported into angle position calculation unit ACU, computing unit ACU correspondingly calculates position, angle AP.Should be appreciated that, the calculating of this position, angle AP will highly depend on the type of position signalling PS.Yet, in the situation that position signalling PS is the form of a plurality of pulses in every integral cycle rotating, ACU will comprise counter, this counter paired pulses counts until the known pulse number of every integral cycle rotating, then the counting of pulse by directly change into 0 ° in-360 ° of scopes position, angle AP or similar angle express.Preferably, position signalling PS comprises the reset signal of an impulse form of every integral cycle rotating, and it can start the angle compensation accurately (offset) corresponding to the position, accurate angle of generator amature.
Then, position, the angle AP that calculates is imposed on predetermined control algolithm CA as input, control algolithm CA comprises mistake processing unit EHU.Position, the angle EAP of position, the angle AP that mistake processing unit EHU relatively calculates and the estimation that receives from estimation unit EST, this estimation unit EST comprises such algorithm, this algorithm is set to preferably consider that several previous input samples foretell next sample value (namely, the position, angle of next expection), produce thus the position, angle of estimating reliably.
Which in position, the angle EAP of position, the angle AP of calculating and estimation mistake processing unit EHU relatively decide to be considered to the most reliable by this, then exports the most reliable conduct in these two to the input EI of estimation unit EST.Preferably, one, sample sample ground carries out this comparison, and can select based on the simple difference of calculating between AP and EAP value.If difference surpasses a certain predetermined value or percentage, just determine that position, the angle EAP that will estimate is provided to estimation unit EST as input EI, because can think that wrong position signalling PS has caused large deviation.This process has only guaranteed that value is input in estimation unit EST the most reliably, has increased thus the quality of position, the angle EAP that estimates.In the embodiment of example, the output of predetermined control algolithm CA, and then the final output of processor DSP, position, the angle PAP that namely processes is also produced by estimation unit EST, as the more detailed explanation that will carry out in conjunction with the embodiment of example shown in Figure 4.
Fig. 3 example another processor DSP embodiment.This DSP embodiment is only relevant with estimation unit EST with mistake processing unit EHU with the difference of the embodiment of Fig. 2.In Fig. 3, the mistake processing unit not only determines to explain above for example in AP and EAP, which is provided to estimation unit EST as input EI.Mistake processing unit EHU also exports position, the angle PAP of processing, namely as being considered to the most reliable one in AP and EAP.In the situation that mistake processing unit EHU has determined that AP must be wrong, EAP is output as position, the angle PAP that processes, and is not detecting in amiss situation, and AP is output as position, the angle PAP that processes.
Fig. 4 example another processor DSP embodiment.Compare with the embodiment of Fig. 2, comprised prefilter or correcting unit CORR in the front of angle computing unit ACU.This correcting unit CORR response position signal produces the CPS that proofreaies and correct.Correcting unit CORR can analysis position signal PS may be namely (to detect temporarily, in single sample or in the sample subsequently of minority) mistake of the number of different types that occurs, just can detect mistake thus, a plurality of samples subsequently are to consider.In the situation that observed mistake in long duration, correcting unit CORR preferably is configured to produce such error signal, and this error signal can be used for the call service personnel and/or close generator system with controlled form.Yet, preferably only detect and proofread and correct interim mistake, make and can keep normal running.Subsequently with reference to Fig. 5 explain can detected mistake example.
In Fig. 4, the effect of mistake processing unit EHU is corresponding to explaining with reference to figure 2, yet in this embodiment, if detected mistake in the AP signal of position, angle, mistake processing unit EHU can produce error signal ERRS.This error signal ERRS can be used for closing in a controlled manner generator system, mistake processing unit EHU selects forever to provide EAP as the input EI to estimation unit EST simultaneously, thus so that the sufficiently long processing angle position PAP that accepts quality to be provided, to guarantee the normal running during controlled shutdown.
In addition, compare with Fig. 2, the mistake processing unit EHU of Fig. 4 has two extra inputs, that is: 1) from the extra position signalling EPS of second place encoder device, this second place encoder device connects the position, angle that is used for the sensing generator amature, and 2) input GI from the electricity of generator, it is as the input of arriving without transducer computing unit SCU, only to calculate another angle position AP2 based on this electricity input GI (that is, not comprising any mechanical position sensor) from generator.This is being known in the art.
In the situation that the master site encoder lost efficacy, for example, in the situation that its fault, mistake processing unit EHU can use angle position data AP2, the EPS of these redundancies to support position, the angle AP based on the master site encoder.This helps to keep normal running until replaced the master site encoder.Under these circumstances, the mistake processing unit will produce error signal ERRS, but can keep safely operation, and generator system can produce until changed the master site encoder by holding power thus.In order to reduce the requirement to processor DSP computing capability, preferably, without transducer computing unit SCU only in the situation that detected mistake in position, the angle AP based on the master site encoder and activated.Identical situation can be applicable to consider the required extra computation from the position signalling EPS of extra position coder.
In Fig. 4, estimation unit EST comprises phase-locked loop pll, it receives input EI and further produces position, the angle PAP of processing in response to the sequence of inputting EI, and position, the angle PAP of the processing of filtration is provided thus, and it is more reliable than position, the angle AP of direct calculating that this PAP is considered to.Should be appreciated that, the design of PLL comprises a plurality of variablees, bandwidth for example, and those skilled in the art can select these variablees in order to be suitable for the characteristic of generator, position coder etc.In addition, the selection of these variablees will depend on the use of output angle position.Thus, processor DSP can comprise two or more PLL, and these PLL are suitable for each position, angle PAP that estimates or process of variant purpose in order to output, and for example, so a plurality of PLL can have different bandwidth.
Fig. 5 example for the position coder of particular type, the typical mistake of some in its position signalling, these typical mistakes can be based on the detections in correcting unit CORR and detected and proofread and correct, and explain as the embodiment with reference to figure 4.Fig. 5 example to the counting of pulse in position signalling PS, each in 4096 pulses that this counting receives for 360 ° of the every integral cycle rotatings of armature spindle.Armature spindle often rotates a circle, and also the desired location encoder provides a reset pulse.The mistake of one type is for example Interference Peaks in the position signalling PS of a sample duration or spike E1, and it is caused by " suspending (the hanging) " position in previous (preceding) digital circuit or electrical noise etc.Correcting unit CORR preferably detects such peak E1 by comparative sample value and sample value before, if current sample value surpasses predetermined change, so current sample value just is detected as peak E1, and this value can be left in the basket or proofread and correct, that is the sample value that, detects as the peak can be corrected as from the desired value of value before.
The mistake of another type is value skew E2, E2 compares and has rising a plurality of subsequent samples of (or reduction) value with desired value, for example it is subjected to the impact of one or more " suspension " position in previous digital circuit (for example, the digital output circuit in position coder).Correcting unit CORR can easily detect and proofread and correct large skew, but in the situation that little skew, skew can not be corrected unit CORR and detect.Yet, in this case, can suppress to be offset at least the impact of E2 by the loop that comprises estimation unit EST.
Can detect like this acceleration E3 that may accelerate that surpasses specific generator, i.e. angular acceleration by for example calculating a plurality of samples and relatively this result of calculation and pre-stored value, the wherein pre-stored value maximum angular acceleration that can produce corresponding to the rotor of specific generator.If the angular acceleration that calculates surpasses this value, it is inevitable owing to the mistake in position signalling.For example, the such acceleration E3 that surpasses the maximum possible angular acceleration of rotor can so be corrected, and the value correction that is about in a plurality of samples is the maximum possible angular acceleration of rotor.Although this is not still to proofread and correct completely, because considered physical restriction, therefore at least more near actual value.Then, the loop that comprises estimation unit EST will reduce remaining mistake.
Mistake E4 represents the reset signal that receives early than expection.This signal can detect like this, if counter for example only reach expection 4096 in 3000, reset signal must be interference signal thereby should be left in the basket, because only can determine that reset signal in pulse maximum number+/-sample from expection is only can be received.
Mistake E5 is opposite with mistake E4, that is, the reset signal of loss or reset signal arrive too late,, is receiving the maximum number pulse of expection (for example, exemplified 4096) afterwards that is.Can revise this mistake, because in the situation that do not receive reset signal, a sample place reset counter after the expection maximum number of pulses being detected at the latest.If do not receive reset signal after several such corrections at all, just producing, correcting unit indicated the impaired error signal of position coder, because received mistakenly too many pulse, or do not receive mistakenly reset signal.
By selecting suitable algorithm, can these mistakes E1, E2, E3, E4, E5 be detected and proofread and correct in pre-filtering or correcting unit CORR.If do not detect or proofread and correct aptly a certain mistake in correcting unit CORR, to cause position, the angle AP that departs from, position, the angle AP that this departs from is detected as most probable mistake and/or is filtered in estimation unit EST at least in mistake processing unit EHU, make position, the angle PAP of processing can not be subject to having a strong impact on of single or minority error sample.
Mistake E6 example the mistake of true angle rotor-position filter, it is installed to armature spindle a little prejudicially owing to position coder, thereby has exported the position signalling that there is no accurately to react true rotor-position.Mistake is filtered E6 can also be owing to the rotating part of position coder and vibration or the vibration between the position coder shell, and this will cause accurately deferring to the position signalling of true rotor-position, but this position signalling will be subjected to such vibration/vibration modulation.May not detect and proofread and correct such filtration mistake in correcting unit CORR, but can eliminate in the loop that comprises estimation unit EST or suppress at least such mistake E6, so mistake E6 will can not affect position, the angle PAP of processing significantly.
Fig. 6 example be connected to the generator system of electrical network EG, for example wind energy conversion system generator system.Position coder ENC is connected to generator GEN, and two feedback-induced generators for example are with the position, angle of sensing generator amature.Position coder produces three signals and responds: each angular resolution once the first pulse signal A, corresponding to the first pulse A but the second pulse signal B and the form that have been offset in time are the reset signal Z of a pulse of 360 ° of rotations of every complete cycle.These signals A, B, Z are received by processor DSP, and it produces position, the angle PAP that processes and responds, as explained above.In addition, as mentioned above, processor DSP is configured to produce error signal ERRS in the situation that detect position coder ENC fault.Control system CS processes the coupling of electrical power from generator GEN to electrical network EG.In order to do like this, position, the angle PAP of control system CS reception ﹠ disposal, and control system is configured to reception error signal ERRS, responds can start controlled shutdown.In the situation that wind energy conversion system can be carried out controlled shutdown in one second.
The accurate mistake processing policy of deferring to is depended on a plurality of factors in specifically arranging, however position, the angle PAP by the top processing of explaining, and generator system will have the possibility of raising and keep normal running.In the situation that position coder ENC fault, generator system will have enough time to carry out controlled shutdown at least.
In a word, the invention provides the electrical power generator system of the power efficiency with improvement, the sensitiveness of the mistake of the power efficiency of this improvement when having reduced the sense angular rotor-position.This system comprises the power generator with rotor and the position, angle of the sensing rotor that connects and produces thus the position coder of position signalling.Processor receiving position signal calculates the position, angle to respond, and calculates the position, angle of estimation based on the position signalling of previous reception, and the position, angle of finally processing based on position, the angle generation of the position, angle of calculating and estimation.The position, angle of this processing is the measurement more reliably to rotor-position, because it is based on previous Position input, and preferred several previous Position inputs.This provides the hyperimmunity to the short-term mistake of position signalling, for for example wind energy conversion system, this means can be in the situation that normal running be kept in the position coder temporary derangement, and in the situation that complete failure, operation can be kept long enough to avoid emergency cutoff.In a preferred embodiment, processor is configured to the pre-filtering position signalling, that is, detected and proofreaied and correct before calculating the position, angle.Also preferably include mistake and process, this mistake is processed based on to the comparison with the position, angle of calculating of the position, angle estimated, and determines that thus this estimator is also for the position, angle that processing is provided to the input based on the estimator of phase-locked loop.
Although described the present invention by specific embodiment, can not by any way it be interpreted as the example that is confined to present.Should explain scope of the present invention according to claims.In the context of claim, term " comprises " or " comprising " do not get rid of other possible unit or steps.In addition, mentioned " one " or " one " should not be interpreted as having got rid of a plurality of.The reference marker in the claim relevant to the unit of accompanying drawing indicating should be construed as limiting the scope of the invention.In addition, the independent feature of mentioning in different claims may advantageously make up, and the combination of in different claim, mentioning of these features not got rid of feature be impossible and favourable.
Claims (22)
1. electrical power generator system comprises:
Power generator (GEN) comprises by shaft-driven rotor;
Position coder (ENC) is configured to come by the mechanical connection to described axle the position, angle of the described rotor of sensing, and produces the position signalling (PS) of the position, angle of the described rotor of expression; And
Processor (DSP) is characterized in that, described processor (DSP) is configured to:
Respond described position signalling (PS) and calculate position, angle AP;
Position signalling based on previous reception calculates position, the angle EAP that estimates; And
Position, angle EAP based on the described angle position AP that calculates and described estimation produces position, the angle PAP that processes.
2. according to claim 1 system, wherein said processor (DSP) comprises correcting unit (CORR), the mistake of the predefined type during described correcting unit (CORR) is configured to detect and proofreaied and correct described position signalling (PS) before calculating described angle position AP.
3. according to claim 2 system, wherein said processor (DSP) is configured to proofread and correct described position signalling (PS) based on the pre-stored characteristic of described position coder (ENC).
4. according to claim 3 system, the pre-stored characteristic of wherein said position coder (ENC) is its angular resolution.
5. according to claim 2 or 3 system, wherein said processor (DSP) is configured to proofread and correct described position signalling (PS) based on the pre-stored characteristic of described power generator.
6. according to claim 5 system, the pre-stored characteristic of wherein said power generator is the angular acceleration of its maximum possible.
7. according to claim 2 or 3 system, wherein the correction of mistake in described position signalling (PS) is comprised in following at least one: remove peak (E1), removal value skew (E2), restriction surpasses the angular acceleration (E3) of predetermined value, and the compensation pulse (E4, E5) of the unexpected number of rotation weekly.
8. the system of any one according to claim 1-4, wherein said processor (DSP) comprises estimation unit (EST), described estimation unit (EST) comprises phase-locked loop (PLL), and wherein said estimation unit (EST) produces position, the angle EAP of described estimation based on previous angle Position input (EI).
9. according to claim 8 system, wherein said processor (DSP) is configured to select position, the angle EAP with described angle position AP or described estimation to be applied to described estimation unit (EST) as angle Position input (EI).
10. according to claim 8 system, position, the angle PAP of wherein said processing is exported by described phase-locked loop (PLL).
11. system according to claim 10, position, the angle EAP of wherein said estimation are by extrapolation (EX) algorithm, calculate from position, the angle PAP of described processing.
12. according to any one the system in the claims 9-11, wherein said processor (DSP) comprises mistake processing unit (EHU), described mistake processing unit (EHU) is configured to based on the comparison that position, the angle EAP of described angle position AP and described estimation detects mistake, and wherein said mistake processing unit (EHU) is selected in amiss situation position, the angle EAP of described estimation is applied to described estimation unit (EST) as angle Position input (EI) detecting.
13. system according to claim 12, wherein said mistake processing unit (EHU) is configured to mistake be detected in the situation that the difference between position, the angle EAP of described angle position AP and described estimation surpasses predetermined value.
14. system according to claim 12, wherein said mistake processing unit (EHU) is configured to select in amiss situation position, the angle EAP output of described estimation position, the angle PAP as described processing detecting.
15. system according to claim 12, wherein said mistake processing unit (EHU) is configured to produce and indicates the error signal (ERRS) that has mistake in described position coder (ENC).
16. system according to claim 15, wherein said mistake processing unit (EHU) produces described error signal (ERRS) be configured to detect the mistake of predetermined number during predetermined duration after.
17. according to any one the system in the claims 1-4, the described position signalling (PS) that wherein said position coder (ENC) produces is three line digital position signals (A, B, Z).
18. system according to claim 17, the described position signalling (PS) that wherein said position coder (ENC) produces is with the position signalling (PS) of the sampling frequency sampling of 2KHz at least.
19. according to any one the system in the claims 1-4, wherein said power generator (GEN) is two feedback-induced generators.
20. according to any one the system in the claims 1-4, also comprise control system (CS), described control system (CS) is configured to receive position, the angle PAP of described processing and controls thus in following at least one: described power generator (GEN) is to the electrical connection of electrical network (EG), and the vibration level of described power generator (GEN).
21. system according to claim 20, wherein said processor is configured to detect the mistake in described position coder (ENC) and produces thus error signal (ERRS), and wherein said control system (CS) is configured in response to the controlled disconnection process of described error signal (ERRS) startup from described electrical network (EG).
22. a wind energy conversion system comprises any one the power generator system according to claim 1-21, position, the angle PAP of wherein said processing is used for eliminating the emergency cutoff that the mistake by described position coder (ENC) causes.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US860707P | 2007-12-19 | 2007-12-19 | |
| DKPA200701826A DK176958B1 (en) | 2007-12-19 | 2007-12-19 | Generator system with intelligent processing of position signal |
| DKPA200701826 | 2007-12-19 | ||
| US61/008,607 | 2007-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101465551A CN101465551A (en) | 2009-06-24 |
| CN101465551B true CN101465551B (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101860029A Expired - Fee Related CN101465551B (en) | 2007-12-19 | 2008-12-18 | Generator system with intelligent processing of position signal |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN101465551B (en) |
| AU (1) | AU2008261119B2 (en) |
| BR (1) | BRPI0805426A2 (en) |
| MX (1) | MX2008016300A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8029233B2 (en) * | 2010-08-31 | 2011-10-04 | General Electric Company | Wind turbine and method for controlling a wind turbine |
| CN109001580B (en) * | 2018-09-26 | 2021-09-10 | 西安理工大学 | Intelligent electric quantity transmission device of generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19827261C1 (en) * | 1998-06-18 | 2000-03-02 | Siemens Ag | Power fluctuation compensation method for generator e.g. of wind-power station |
| EP1341311A2 (en) * | 2002-02-28 | 2003-09-03 | Fanuc Ltd | Signal processing apparatus for encoder |
| CN1613644A (en) * | 2003-11-03 | 2005-05-11 | 海德堡印刷机械股份公司 | Circuit for clock interpolation |
| CN101026301A (en) * | 2006-01-31 | 2007-08-29 | 通用电气公司 | Method, apparatus and computer program product for injection current |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1436887A1 (en) * | 2001-09-14 | 2004-07-14 | Edwin A. Sweo | Brushless doubly-fed induction machine control |
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2008
- 2008-12-12 BR BRPI0805426-6A patent/BRPI0805426A2/en not_active Application Discontinuation
- 2008-12-18 CN CN2008101860029A patent/CN101465551B/en not_active Expired - Fee Related
- 2008-12-18 AU AU2008261119A patent/AU2008261119B2/en not_active Ceased
- 2008-12-18 MX MX2008016300A patent/MX2008016300A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19827261C1 (en) * | 1998-06-18 | 2000-03-02 | Siemens Ag | Power fluctuation compensation method for generator e.g. of wind-power station |
| EP1341311A2 (en) * | 2002-02-28 | 2003-09-03 | Fanuc Ltd | Signal processing apparatus for encoder |
| CN1613644A (en) * | 2003-11-03 | 2005-05-11 | 海德堡印刷机械股份公司 | Circuit for clock interpolation |
| CN101026301A (en) * | 2006-01-31 | 2007-08-29 | 通用电气公司 | Method, apparatus and computer program product for injection current |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0805426A2 (en) | 2009-08-18 |
| AU2008261119B2 (en) | 2011-09-08 |
| MX2008016300A (en) | 2009-06-18 |
| AU2008261119A1 (en) | 2009-07-09 |
| CN101465551A (en) | 2009-06-24 |
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