CN109861612A - Rotor position angle detection method and device of wind generating set - Google Patents
Rotor position angle detection method and device of wind generating set Download PDFInfo
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Abstract
The invention discloses a rotor position angle detection method and device of a wind generating set. The rotor position angle detection method of the wind generating set comprises the following steps: acquiring motor side current and motor side voltage of a converter of the wind generating set; calculating a current vector corresponding to the motor side current and a voltage vector corresponding to the motor side voltage according to the motor side current and the motor side voltage; and calculating the rotor position angle of the wind generating set by using the current vector and the voltage vector. According to the embodiment of the invention, the detection precision of the rotor position angle of the wind generating set can be improved, and the control error of the wind generating set is reduced.
Description
Technical field
The invention belongs to a kind of detections of the rotor position angle of technical field of wind power generator more particularly to wind power generating set
Method and device.
Background technique
When to for example synchronous generator controls, need to obtain the rotor position angle of synchronous generator, so as to same
It walks generator and carries out decoupling control.
In general, the cardinal principle of the detection method using position-sensor-free measurement rotor position angle are as follows: the synchronous hair of measurement
The dynamo current of motor estimates the rotor position angle of synchronous generator using dynamo current and generator mathematical model.
But when using the rotor position angle of above-mentioned detection method estimation synchronous generator, the accuracy of estimation result according to
Rely in the accurate of generator parameter.When generator parameter drifts about, between estimation result and the actual value of rotor position angle
Deviation will occur, to bring the control error to synchronous generator.
Summary of the invention
In view of above-described one or more problems, the embodiment of the invention provides a kind of rotors of wind power generating set
Position angle detection method and device.
On the one hand, the embodiment of the present invention provides a kind of rotor position angle detection method of wind power generating set, comprising:
Obtain the motor side electric current and motor side voltage of the current transformer of wind power generating set；
According to the motor side electric current and the motor side voltage, calculate the corresponding current phasor of the motor side electric current and
The corresponding voltage vector of the motor side voltage；
Using the current phasor and the voltage vector, the rotor position angle of the wind power generating set is calculated.
Further, according to the motor side electric current and the motor side voltage, it is corresponding to calculate the motor side electric current
Current phasor and the corresponding voltage vector of the motor side voltage include:
Determine the corresponding voltage phase angle of the motor side voltage；
According to the voltage phase angle, the motor side electric current and the motor side voltage, the motor side electric current pair is calculated
The current phasor and the corresponding voltage vector of the motor side voltage answered.
Further, it is determined that before the corresponding voltage phase angle of the motor side voltage, further includes:
To the motor side voltage filter, the motor side voltage of preset frequency is chosen；Or/also,
After determining the corresponding voltage phase angle of the motor side voltage, further includes:
Obtain the phase-shift phase to filtered motor side voltage；
According to the phase-shift phase, phase shift compensation is carried out to the voltage phase angle.
Further, using the current phasor and the voltage vector, the rotor position of the wind power generating set is calculated
Angle setting includes:
According to the current phasor and the voltage vector, the built-in potential phase angle of the wind power generating set is calculated；
Obtain the angle of the flux linkage vector corresponding flux linkage vector angle and the built-in potential phase angle of the wind power generating set
Spend difference；
According to the built-in potential phase angle and the angle difference, the rotor position angle is determined.
Further, according to the current phasor and the voltage vector, the built-in potential of the wind power generating set is calculated
Phase angle includes:
Determine the corresponding voltage angular frequency of the motor side voltage；
According to the current phasor, the voltage vector and the voltage angular frequency, calculated using generator potential equation
The built-in potential vector of the wind power generating set；
According to the built-in potential vector, the built-in potential phase angle is determined.
Further, current of electric open circuit is connected between the current transformer of the wind power generating set and the generator
Device, voltage or current of electric open circuit of the motor side voltage between the current of electric breaker and the generator
Voltage between device and the current transformer.
On the other hand, the embodiment of the invention provides a kind of rotor-position angle detecting devices of wind power generating set, comprising:
Electric current obtains module, the motor side electricity for the current transformer that the rotor position angle for obtaining wind power generating set detects
Stream；
Voltage obtains module, the motor side electricity for the current transformer that the rotor position angle for obtaining wind power generating set detects
Pressure；
Vectors calculation module, the vectors calculation module respectively with the current acquisition module and the voltage acquisition module
Connection, for calculating the corresponding current phasor of the motor side electric current according to the motor side electric current and the motor side voltage
Voltage vector corresponding with the motor side voltage；
Position computation module, the position computation module are connect with the vectors calculation module, for utilizing the electric current
Voltage vector described in vector sum calculates the rotor position angle of the rotor position angle detection of the wind power generating set.
Further, further includes:
Phaselocked loop, the phaselocked loop are connect with the voltage acquisition module and the vectors calculation module respectively, for true
Determine the corresponding voltage phase angle of the motor side voltage, and the voltage phase angle is sent to the vectors calculation module, makes described
Vectors calculation module calculates the motor side electricity according to the voltage phase angle, the motor side electric current and the motor side voltage
Flow corresponding current phasor and the corresponding voltage vector of the motor side voltage.
Further, between the phaselocked loop and the voltage acquisition module, further includes:
Low-pass filter, the low-pass filter are connect with the voltage acquisition module, for filtering the motor side electricity
The high-frequency interferencing signal of pressure；
Bandpass filter, the bandpass filter is connect with the low-pass filter and the phaselocked loop, pre- for choosing
Determine the motor side voltage of frequency.
Further, between the phaselocked loop and the vectors calculation module, further includes:
Phase shift compensation device, for obtaining the phase-shift phase to filtered motor side voltage, and according to the phase-shift phase to institute
It states voltage phase angle and carries out phase shift compensation.
Further, the phaselocked loop is also connect with the position computation module, wherein the phaselocked loop is also used to determine
The voltage angular frequency is simultaneously sent to the position computation module, institute's rheme by the corresponding voltage angular frequency of the motor side voltage
Computing module is set according to the current phasor, the voltage vector and the voltage angular frequency, utilizes generator potential equation meter
The built-in potential vector of the wind power generating set is calculated, then according to the built-in potential vector, determines the built-in potential phase angle.
The rotor position angle detection method and device of the wind power generating set of the embodiment of the present invention can be based on wind-power electricity generation
The motor side electric current and motor side voltage of the current transformer of unit calculate the current phasor and voltage arrow of the motor side of current transformer
Amount, then calculates the rotor position angle of wind power generating set using current phasor and voltage vector, to pass through detection current transformer
Motor side electric current and motor side voltage directly estimate the rotor position angle of wind power generating set, without by being sent out using wind-force
The mathematical model of motor group is estimated, independent of the parameter of wind power generating set, therefore, even if the ginseng of wind power generating set
Existing drift is counted, the rotor position angle being calculated will not be made deviation occur, to improve the rotor position of wind power generating set
The detection accuracy of angle setting reduces the control error to wind power generating set.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the process signal of the rotor position angle detection method for the wind power generating set that invention one embodiment provides
Figure；
Fig. 2 is the flow diagram of the specific method of one embodiment of S120 in Fig. 1；
Fig. 3 is the flow diagram of the specific method of another embodiment of S120 in Fig. 1；
Fig. 4 is the flow diagram of the specific method of one embodiment of S130 in Fig. 1；
Fig. 5 is the flow diagram of the specific method of one embodiment of S131 in Fig. 4；
Fig. 6 is the generator polar plot of one embodiment of the invention；
Fig. 7 is the structural representation of the rotor-position angle detecting device of wind power generating set provided by one embodiment of the present invention
Figure；
Fig. 8 is that the rotor-position angle detecting device of the embodiment of the present invention and an exemplary structure of wind power generating set are shown
It is intended to.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, below in conjunction with drawings and the specific embodiments, the present invention is carried out further detailed
Description.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting this hair
It is bright.To those skilled in the art, the present invention can be in the case where not needing some details in these details
Implement.The description of embodiment is preferably managed just for the sake of being provided by showing example of the invention of the invention below
Solution.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
In order to solve prior art problem, the embodiment of the invention provides a kind of rotor-position angle measuring method and device,
Motor.Rotor-position angle measuring method is provided for the embodiments of the invention first below to be introduced.
Fig. 1 shows the process of the rotor position angle detection method of wind power generating set provided by one embodiment of the present invention
Schematic diagram.As shown in Figure 1, the rotor position angle detection method, comprising:
S110, obtain wind power generating set current transformer motor side electric current and motor side voltage；
S120, according to motor side electric current and motor side voltage, calculate the corresponding current phasor of motor side electric current and motor side
The corresponding voltage vector of voltage；
S130, using current phasor and voltage vector, calculate the rotor position angle of wind power generating set.
The embodiment of the present invention can motor side electric current and motor side voltage based on the current transformer of wind power generating set, calculate
The current phasor and voltage vector of the motor side of current transformer out, then calculates wind-power electricity generation using current phasor and voltage vector
The rotor position angle of unit, directly to estimate wind-driven generator by the motor side electric current and motor side voltage of detection current transformer
The rotor position angle of group reduces to improve the detection accuracy of the rotor position angle of wind power generating set to wind power generating set
Control error.
In S110 of the embodiment of the present invention, motor electricity can connect between the current transformer and generator of wind power generating set
Flow breaker, motor side voltage can voltage between current of electric breaker and generator or motor side voltage can also
Think the voltage between current of electric breaker and current transformer.When motor side voltage is between current of electric breaker and current transformer
Voltage when, can by the disconnection and closure of current of electric breaker, control whether detection rotor position angle.When motor side electricity
When pressing the voltage between current of electric breaker and generator, as long as generator starts, no matter current of electric breaker is
No closure, can detecte rotor position angle, to reduce wind power generation set grid-connection impact torque and dash current.
Fig. 2 shows the flow diagrams of the specific method of one embodiment of S120 in Fig. 1.As shown in Fig. 2, S120,
According to motor side electric current and motor side voltage, the corresponding current phasor of motor side electric current and the corresponding voltage of motor side voltage are calculated
The specific method of vector may include:
S210, the corresponding voltage phase angle of motor side voltage is determined；
S220, according to voltage phase angle, motor side electric current and motor side voltage, calculate the corresponding current phasor of motor side electric current
Voltage vector corresponding with motor side voltage.
It, can be by carrying out locking phase to motor side voltage signal, to obtain motor side electricity in S210 of the embodiment of the present invention
Press corresponding voltage phase angle.
After having obtained voltage phase angle, it can converted using voltage phase angle, motor side electric current and motor side voltage
It calculates, so that the corresponding current phasor of motor side electric current and the corresponding voltage vector of motor side voltage be calculated.
It is possible, firstly, to determine that the three-phase voltage of motor side electric current and motor side voltage under three-phase static coordinate system is sat respectively
Mark and three-phase current coordinate.
Then, by the conversion formula of three phase static coordinate and two-phase static coordinate, by three-phase voltage coordinate and three-phase electricity
Stream coordinate is respectively converted into two-phase voltage coordinate and biphase current coordinate under two-phase stationary coordinate system:
Wherein, Ua、Ub、UcThe voltage coordinate value of a axis, b axis, c-axis, U respectively in three-phase static coordinate systemα、UβRespectively
The voltage coordinate value of α axis, β axis in two-phase stationary coordinate system.Ia、Ib、IcA axis, b axis, c-axis respectively in three-phase static coordinate system
Electric current coordinate value, Iα、IβThe electric current coordinate value of α axis, β axis respectively in two-phase stationary coordinate system.
Then, by the conversion formula of two-phase static coordinate and synchronously rotating reference frame, using voltage phase angle, by two-phase voltage
Coordinate and biphase current coordinate are respectively converted into synchronizing voltage coordinate and synchronizing current coordinate under synchronous rotating frame:
Wherein, Uα、UβThe voltage coordinate value of α axis, β axis, U respectively in two-phase stationary coordinate systemd、UqRespectively synchronous rotation
Turn the voltage coordinate value of d axis in coordinate system, q axis.Iα、IβThe electric current coordinate value of α axis, β axis respectively in two-phase stationary coordinate system,
Id、IqThe electric current coordinate value of d axis, q axis respectively in synchronous rotating frame.
Finally, the voltage vector length and electricity of voltage vector are calculated by synchronizing voltage coordinate and synchronizing current coordinate
Press the current phasor length and current phasor angle of vector angle and current phasor.
Wherein, | US| it is voltage vector length, θuFor voltage vector angle, | IS| it is current phasor length, θIFor electric current arrow
Measuring angle.
Fig. 3 shows the flow diagram of the specific method of another embodiment of S120 in Fig. 1.As shown in figure 3,
S320, before determining the corresponding voltage phase angle of motor side voltage, can also include:
S310, to motor side voltage filter, choose the motor side voltage of preset frequency.
In S310 of the embodiment of the present invention, is modulated due to current transformer and generate high-frequency interferencing signal, therefore, it is necessary to motor side
Voltage filter eliminates interference signal, and selects the motor side voltage signal of preset frequency, to ensure the progress of subsequent calculating.
Due to filtering meeting so that motor side voltage signal voltage phase angle generation phase shift, in order to by voltage phase angle also
Originally be the corresponding phase angle of motor side voltage of actual acquisition, in S320, determine the corresponding voltage phase angle of motor side voltage after, may be used also
To include:
S330, it obtains to the phase-shift phase of filtered motor side voltage；
S340, according to phase-shift phase, phase shift compensation is carried out to voltage phase angle.
In S330 of the embodiment of the present invention, the phase-shift phase that available filtering generates motor side voltage is as filtered
The phase-shift phase of motor side voltage.Then, in S340 of the embodiment of the present invention, phase shift benefit is carried out to voltage phase angle is obtained by trivial phase
It repays.If filtering leads to phase angular advance, the voltage phase angle after phase-shift phase obtains phase shift compensation is subtracted using voltage phase angle；If filtering
After leading to phase angle, then the voltage phase angle after phase shift compensation is obtained plus phase-shift phase using voltage phase angle.
Fig. 4 shows the flow diagram of the specific method of one embodiment of S130 in Fig. 1.As shown in figure 4, S130,
Using current phasor and voltage vector, the rotor position angle for calculating wind power generating set includes:
S131, according to current phasor and voltage vector, calculate the built-in potential phase angle of wind power generating set；
S132, obtain wind power generating set flux linkage vector corresponding flux linkage vector angle and built-in potential phase angle differential seat angle
Value；
S133, according to built-in potential phase angle and angle difference, determine rotor position angle.
Fig. 5 shows the flow diagram of the specific method of one embodiment of S131 in Fig. 4.As shown in figure 4, S131,
According to current phasor and voltage vector, the built-in potential phase angle for calculating wind power generating set includes:
S410, the corresponding voltage angular frequency of motor side voltage is determined；
S420, according to current phasor, voltage vector and voltage angular frequency, utilize generator potential equation to calculate wind-power electricity generation
The built-in potential vector of unit；
S430, according to built-in potential vector, determine built-in potential phase angle.
In S410 of the embodiment of the present invention, can be handled by locking phase above-mentioned can also obtain voltage angular frequency.Then,
In S420 of the embodiment of the present invention, according to current phasor, voltage vector and voltage angular frequency, calculated using generator potential equation
The built-in potential vector of wind power generating set.
By taking face mounted permanent magnet synchronous motor (permanent magnet synchronous motor, PMSM) as an example, face
The generator potential equation of dress formula PMSM are as follows:
Wherein,For voltage vector,For current phasor, RsFor generator windings D.C. resistance, ωsFor voltage angular frequency
Rate, LsFor generator equivalent inductance,For built-in potential vector, j is equation operator.
Then, in S430 of the embodiment of the present invention, according to calculated built-in potential vector, it can determine built-in potential phase
Angle.
Since in synchronous rotating frame, the flux linkage vector angle of flux linkage vector is identical as rotor position angle, therefore,
In S132 of the embodiment of the present invention, the difference between flux linkage vector angle and built-in potential phase angle can be determined, then of the invention real
It applies in a S133, rotor position angle can be calculated according to built-in potential phase angle and angle difference.
Fig. 6 shows the generator polar plot of one embodiment of the invention.As shown in fig. 6, horizontal axis is synchronously rotating reference frame
The d axis of system, the longitudinal axis are the q axis of synchronous rotating frame,For flux linkage vector, it can be seen that in flux linkage vector angle is ahead of
The angle of potential phase angle isTherefore, built-in potential phase angle can be subtractedRotor position angle can be obtained.
Fig. 7 shows the structure of the rotor-position angle detecting device of wind power generating set provided by one embodiment of the present invention
Schematic diagram.As shown in fig. 7, the rotor-position angle detecting device, comprising:
Electric current obtains module 510, the motor side electric current of the current transformer for obtaining wind power generating set；
Voltage obtains module 520, the motor side voltage of the current transformer for obtaining wind power generating set；
Vectors calculation module 530, module 510 is obtained with electric current respectively for vectors calculation module 530 and voltage obtains module 520
Connection, for calculating the corresponding current phasor of motor side electric current and motor side voltage according to motor side electric current and motor side voltage
Corresponding voltage vector；
Position computation module 540, position computation module 540 are connect with vectors calculation module 530, for utilizing current phasor
And voltage vector, calculate the rotor position angle of wind power generating set.
The embodiment of the present invention can motor side electric current and motor side voltage based on the current transformer of wind power generating set, calculate
The current phasor and voltage vector of the motor side of current transformer out, then calculates wind-power electricity generation using current phasor and voltage vector
The rotor position angle of unit, directly to estimate wind-driven generator by the motor side electric current and motor side voltage of detection current transformer
The rotor position angle of group reduces to improve the detection accuracy of the rotor position angle of wind power generating set to wind power generating set
Control error.
In embodiments of the present invention, the rotor-position angle detecting device further include:
Phaselocked loop 550, phaselocked loop 550 obtains module 520 with voltage respectively and vectors calculation module 530 is connect, for true
Determine the corresponding voltage phase angle of motor side voltage, and voltage phase angle is sent to vectors calculation module 530, makes vectors calculation module
530, according to voltage phase angle, motor side electric current and motor side voltage, calculate the corresponding current phasor of motor side electric current and motor side electricity
Press corresponding voltage vector.
In embodiments of the present invention, between phaselocked loop 550 and voltage acquisition module 520, further includes:
Low-pass filter 560, low-pass filter 560 obtains module 520 with voltage and connect, for filtered motor side voltage
High-frequency interferencing signal；
Bandpass filter 570, bandpass filter 570 is connect with low-pass filter 560 and phaselocked loop 550, pre- for choosing
Determine the motor side voltage of frequency.
In embodiments of the present invention, between phaselocked loop 550 and vectors calculation module 530, further includes:
Phase shift compensation device 580, for obtaining the phase-shift phase to filtered motor side voltage, and according to phase-shift phase to voltage
Phase angle carries out phase shift compensation.
In embodiments of the present invention, phaselocked loop 550 is also connect with position computation module 540, wherein phaselocked loop 550 is also used
In determining the corresponding voltage angular frequency of motor side voltage and voltage angular frequency being sent to position computation module 540, position is calculated
Module 540 calculates wind power generating set according to current phasor, voltage vector and voltage angular frequency, using generator potential equation
Built-in potential vector determines built-in potential phase angle then according to built-in potential vector.
In an embodiment of the invention, the rotor-position angle detecting device of wind power generating set can be set in current transformer
Controller in.In another embodiment, the rotor-position angle detecting device of wind power generating set can be set to
Independent control module.
Fig. 8 shows the rotor-position angle detecting device of the embodiment of the present invention and an exemplary knot of wind power generating set
Structure schematic diagram.
As shown in figure 8, being connected with current of electric breaker 603, DU/DT filter in turn between generator 601 and power grid 602
Wave device 604, current transformer 605, LC filter 606 and current transformer net side main circuit breaker 607.
Electric current obtains module 608 and voltage obtains module 609 and can be connected to DU/DT filter by corresponding sensor respectively
On route between wave device 604 and current transformer 605, electric current obtains module 608 and voltage obtains module 609 and is respectively connected to vector
Computing module 610, voltage obtain module 609 and also pass sequentially through low-pass filter 611, bandpass filter 612,613 and of phaselocked loop
Phase shift compensation device 614 is connected to vectors calculation module 610, and then, vectors calculation module 610 and phase shift compensation device 614 connect respectively
It is connected to position computation module 615.
In another embodiment, voltage, which obtains module 609, to be connected to current of electric by sensor
Route between breaker 603 and generator 601, as long as at this point, generator 601 start, no matter current of electric breaker 603
Whether it is closed, can detecte the rotor position angle of generator 601, reduces the grid-connected impact torque of generator 601 and impact electricity
Stream.
In other embodiments, voltage obtains module 609 can also be connected to current of electric breaker 603 by sensor
With the route between DU/DT filter 604.
In the embodiment shown in fig. 8, electric current acquisition module 608 has been separately provided in other embodiments can not also
Electric current is separately provided and obtains module 608, is directly obtained using the integrated current sensors in the controller of current transformer 605 as electric current
Modulus block 608.
It should be noted that the exemplary embodiment referred in the present invention, is described based on a series of step or device
Certain methods or system.But the present invention is not limited to the sequence of above-mentioned steps, that is to say, that can be according to mentioning in embodiment
And sequence execute step, may also be distinct from that the sequence in embodiment or several steps are performed simultaneously.
The above description is merely a specific embodiment, it is apparent to those skilled in the art that,
For convenience of description and succinctly, the system, module of foregoing description and the specific work process of unit can refer to preceding method
Corresponding process in embodiment, details are not described herein.It should be understood that scope of protection of the present invention is not limited thereto, it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.
Claims (11)
1. a kind of rotor position angle detection method of wind power generating set characterized by comprising
Obtain the motor side electric current and motor side voltage of the current transformer of wind power generating set；
According to the motor side electric current and the motor side voltage, the corresponding current phasor of the motor side electric current and described is calculated
The corresponding voltage vector of motor side voltage；
Using the current phasor and the voltage vector, the rotor position angle of the wind power generating set is calculated.
2. the rotor position angle detection method of wind power generating set according to claim 1, which is characterized in that according to described
Motor side electric current and the motor side voltage calculate the corresponding current phasor of the motor side electric current and the motor side voltage pair
The voltage vector answered includes:
Determine the corresponding voltage phase angle of the motor side voltage；
According to the voltage phase angle, the motor side electric current and the motor side voltage, it is corresponding to calculate the motor side electric current
Current phasor and the corresponding voltage vector of the motor side voltage.
3. the rotor position angle detection method of wind power generating set according to claim 2, which is characterized in that described in determining
Before the corresponding voltage phase angle of motor side voltage, further includes:
To the motor side voltage filter, the motor side voltage of preset frequency is chosen；Or/also,
After determining the corresponding voltage phase angle of the motor side voltage, further includes:
Obtain the phase-shift phase to filtered motor side voltage；
According to the phase-shift phase, phase shift compensation is carried out to the voltage phase angle.
4. the rotor position angle detection method of wind power generating set according to claim 1, which is characterized in that described in utilization
Current phasor and the voltage vector, the rotor position angle for calculating the wind power generating set include:
According to the current phasor and the voltage vector, the built-in potential phase angle of the wind power generating set is calculated；
Obtain the differential seat angle of the flux linkage vector corresponding flux linkage vector angle and the built-in potential phase angle of the wind power generating set
Value；
According to the built-in potential phase angle and the angle difference, the rotor position angle is determined.
5. the rotor position angle detection method of wind power generating set according to claim 4, which is characterized in that according to described
Current phasor and the voltage vector, the built-in potential phase angle for calculating the wind power generating set include:
Determine the corresponding voltage angular frequency of the motor side voltage；
According to the current phasor, the voltage vector and the voltage angular frequency, using described in the calculating of generator potential equation
The built-in potential vector of wind power generating set；
According to the built-in potential vector, the built-in potential phase angle is determined.
6. the rotor position angle detection method of wind power generating set according to claim 1, which is characterized in that the wind-force
Current of electric breaker is connected between the current transformer and generator of generating set, the motor side voltage is the current of electric
The voltage between voltage or the current of electric breaker and the current transformer between breaker and the generator.
7. a kind of rotor-position angle detecting device of wind power generating set characterized by comprising
Electric current obtains module, the motor side electric current of the current transformer for obtaining wind power generating set；
Voltage obtains module, the motor side voltage of the current transformer for obtaining wind power generating set；
Vectors calculation module, the vectors calculation module connect with the current acquisition module and the voltage acquisition module respectively
Connect, for according to the motor side electric current and the motor side voltage, calculate the corresponding current phasor of the motor side electric current and
The corresponding voltage vector of the motor side voltage；
Position computation module, the position computation module are connect with the vectors calculation module, for utilizing the current phasor
With the voltage vector, the rotor position angle of the wind power generating set is calculated.
8. the rotor-position angle detecting device of wind power generating set according to claim 7, which is characterized in that further include:
Phaselocked loop, the phaselocked loop is connect with the voltage acquisition module and the vectors calculation module respectively, for determining
The corresponding voltage phase angle of motor side voltage is stated, and the voltage phase angle is sent to the vectors calculation module, makes the vector
Computing module calculates the motor side electric current pair according to the voltage phase angle, the motor side electric current and the motor side voltage
The current phasor and the corresponding voltage vector of the motor side voltage answered.
9. the rotor-position angle detecting device of wind power generating set according to claim 8, which is characterized in that the locking phase
Between ring and the voltage acquisition module, further includes:
Low-pass filter, the low-pass filter are connect with the voltage acquisition module, for filtering the motor side voltage
High-frequency interferencing signal；
Bandpass filter, the bandpass filter are connect with the low-pass filter and the phaselocked loop, for choosing predetermined frequency
The motor side voltage of rate.
10. the rotor-position angle detecting device of wind power generating set according to claim 9, which is characterized in that the lock
Between vectors calculation module described in Xiang Huanyu, further includes:
Phase shift compensation device, for obtaining the phase-shift phase to filtered motor side voltage, and according to the phase-shift phase to the electricity
Phase angle is pressed to carry out phase shift compensation.
11. the rotor-position angle detecting device of the wind power generating set according to any one of claim 8-10, feature
It is, the phaselocked loop is also connect with the position computation module, wherein the phaselocked loop is also used to determine the motor side electricity
It presses corresponding voltage angular frequency and the voltage angular frequency is sent to the position computation module, the position computation module root
According to the current phasor, the voltage vector and the voltage angular frequency, the wind-force is calculated using generator potential equation and is sent out
The built-in potential vector of motor group determines the built-in potential phase angle then according to the built-in potential vector.
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