CN107947202A - A kind of power grid subsynchronous resonance treating method and apparatus - Google Patents
A kind of power grid subsynchronous resonance treating method and apparatus Download PDFInfo
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- CN107947202A CN107947202A CN201711351323.5A CN201711351323A CN107947202A CN 107947202 A CN107947202 A CN 107947202A CN 201711351323 A CN201711351323 A CN 201711351323A CN 107947202 A CN107947202 A CN 107947202A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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Abstract
This application provides a kind of power grid subsynchronous resonance treating method and apparatus, by carrying out damping adjustment to voltage d axis bid value according to the first amount of resistant that rotor watt current value of feedback and rotor reactive current value of feedback are calculated, obtain rotor voltage d axis set-points, and by carrying out damping adjustment to rotor voltage q axis bid value according to the second amount of resistant that rotor watt current value of feedback and rotor reactive current value of feedback are calculated, rotor voltage q axis set-points are obtained, so as to suppress to the subsynchronous resonance occurred in double-fed wind generating network；And rotational coordinates inverse transformation is carried out with voltage d axis set-point and rotor voltage q axis set-point, obtain rotor voltage bid value；Without changing to the circuit structure of double-fed wind generating network, it is possible to which the subsynchronous resonance occurred in double-fed wind generating network is suppressed.
Description
Technical field
This application involves double-fed wind generating technical field, in particular to a kind of power grid subsynchronous resonance processing side
Method and device.
Background technology
At present, as installed capacity of wind-driven power is continuously increased, some remote districts, due to farther out, transmit electricity apart from major network away from
From larger, increase serial compensation capacitance increase ability to transmit electricity, in double-fed wind-driven power generation network, serial compensation capacitance and line in the line
The equivalent inductance on road, transformer and generator easily causes subsynchronous resonance.It is subsynchronous humorous in double-fed wind generating network
Vibration frequency is general relatively low (several hertz to more than ten hertz), in the case of negative damping, vibrates gradually diverging, harm is larger.
, can be in double-fed wind generating network in order to suppress to the subsynchronous resonance in double-fed wind generating network
Change the resonant frequency of double-fed wind generating network using Static Type Dynamic Reactive Compensation Device or increase capacitance.
Using Static Type Dynamic Reactive Compensation Device or increase capacitance, can all cause the circuit of double-fed wind generating network
Structural change, increase double-fed wind generating network suppress the cost of subsynchronous resonance.
The content of the invention
In view of this, the purpose of the embodiment of the present application is to provide a kind of power grid subsynchronous resonance treating method and apparatus,
While subsynchronous resonance is suppressed, will not be changed to the circuit structure of double-fed wind generating network.
In a first aspect, the embodiment of the present application provides a kind of power grid subsynchronous resonance processing method, including：
Obtain active set-point, active value of feedback, idle set-point, idle value of feedback, rotor watt current value of feedback, turn
Sub- reactive current value of feedback and rotor slip angle；
According to the active set-point and the active value of feedback, rotor watt current set-point is obtained, and according to described
Idle set-point and the idle value of feedback, obtain rotor reactive current set-point；
According to the rotor watt current value of feedback and the rotor reactive current value of feedback, the first amount of resistant is calculated respectively
With the second amount of resistant；
According to the rotor watt current value of feedback and the rotor watt current set-point, rotor voltage d axis life is obtained
Value is made, and according to the rotor reactive current value of feedback and the rotor reactive current set-point, obtains rotor voltage q axis orders
Value；
According to first amount of resistant and the rotor voltage d axis bid values, rotor voltage d axis set-points, and root are obtained
According to second amount of resistant and the rotor voltage q axis bid values, rotor voltage q axis set-points are obtained；
Based on the rotor slip angle, to the rotor voltage d axis set-point and the rotor voltage q axis set-point into
Row rotational coordinates inverse transformation, obtains rotor voltage bid value.
With reference to first aspect, the embodiment of the present application provides the first possible embodiment of first aspect, wherein：Root
According to the rotor watt current value of feedback and the rotor reactive current value of feedback, the first amount of resistant and the second damping are calculated respectively
Amount, including：
Determine damped coefficient；
Network voltage is sampled, obtains the resonant frequency of the network voltage, and the network voltage is locked
Phase, obtains the fundamental frequency of the network voltage；
According to the resonant frequency and fundamental frequency of the network voltage, the resonance complement frequency of the network voltage is calculated；
According to the resonance complement frequency, to the rotor watt current value of feedback and the rotor reactive current value of feedback
Operation is filtered, obtains the rotor watt current value of feedback under the resonance complement frequency and the resonance complement frequency
Under the rotor reactive current value of feedback；
The product of the rotor watt current value of feedback and the damped coefficient under the resonance complement frequency is calculated, is obtained
To first amount of resistant；
The product of the rotor reactive current value of feedback and the damped coefficient under the resonance complement frequency is calculated, is obtained
To second amount of resistant.
With reference to first aspect, the embodiment of the present application provides second of possible embodiment of first aspect, wherein：Root
According to the resonant frequency and fundamental frequency of the network voltage, the resonance complement frequency of the network voltage is calculated, including：
The resonance complement frequency of the network voltage is calculated by the following formula：
Resonance complement frequency=fundamental frequency-resonant frequency.
With reference to first aspect, the embodiment of the present application provides the third possible embodiment of first aspect, wherein：Really
Determine damped coefficient, including：
Obtain the generator speed of generator in power grid；
By the generator speed, inquired from the correspondence of generator speed and damped coefficient and the power generation
The corresponding damped coefficient of machine rotating speed.
With reference to first aspect, the embodiment of the present application provides the 4th kind of possible embodiment of first aspect, wherein：Root
According to first amount of resistant and the rotor voltage d axis bid values, rotor voltage d axis set-points are obtained, including：
Rotor voltage d axis set-points are calculated by the following formula：
Rotor voltage d axis set-point=rotor voltage d axis the+the first amount of resistant of bid value；
According to second amount of resistant and the rotor voltage q axis bid values, rotor voltage q axis set-points are obtained, including：
Rotor voltage q axis set-points are calculated by the following formula：
Rotor voltage q axis set-point=rotor voltage q axis the+the second amount of resistant of bid value.
Second aspect, the embodiment of the present application provide a kind of power grid subsynchronous resonance processing unit, including：
Acquisition module, it is active for obtaining active set-point, active value of feedback, idle set-point, idle value of feedback, rotor
Current feedback values, rotor reactive current value of feedback and rotor slip angle；
First processing module, for according to the active set-point and the active value of feedback, obtaining rotor watt current
Set-point, and according to the idle set-point and the idle value of feedback, obtain rotor reactive current set-point；
Second processing module, for according to the rotor watt current value of feedback and the rotor reactive current value of feedback,
The first amount of resistant and the second amount of resistant are calculated respectively；
3rd processing module, for according to the rotor watt current value of feedback and the rotor watt current set-point,
Rotor voltage d axis bid values are obtained, and according to the rotor reactive current value of feedback and the rotor reactive current set-point, are obtained
To rotor voltage q axis bid values；
Fourth processing module, for according to first amount of resistant and the rotor voltage d axis bid values, obtaining rotor electricity
D axis set-points are pressed, and according to second amount of resistant and the rotor voltage q axis bid values, obtains rotor voltage q axis and gives
Value；
5th processing module, for based on the rotor slip angle, to the rotor voltage d axis set-point and described turn
Sub- voltage q axis set-point carries out rotational coordinates inverse transformation, obtains rotor voltage bid value.
With reference to second aspect, the embodiment of the present application provides the first possible embodiment of second aspect, wherein：Institute
Second processing module is stated, is specifically used for：
Determine damped coefficient；
Network voltage is sampled, obtains the resonant frequency of the network voltage, and the network voltage is locked
Phase, obtains the fundamental frequency of the network voltage；
According to the resonant frequency and fundamental frequency of the network voltage, the resonance complement frequency of the network voltage is calculated；
According to the resonance complement frequency, to the rotor watt current value of feedback and the rotor reactive current value of feedback
Operation is filtered, obtains the rotor watt current value of feedback under the resonance complement frequency and the resonance complement frequency
Under the rotor reactive current value of feedback；
The product of the rotor watt current value of feedback and the damped coefficient under the resonance complement frequency is calculated, is obtained
To first amount of resistant；
The product of the rotor reactive current value of feedback and the damped coefficient under the resonance complement frequency is calculated, is obtained
To second amount of resistant.
With reference to second aspect, the embodiment of the present application provides second of possible embodiment of second aspect, wherein：Institute
Second processing module is stated, according to the resonant frequency and fundamental frequency of the network voltage, the resonance for calculating the network voltage is mutual
Frequency is mended, including：
The resonance complement frequency of the network voltage is calculated by the following formula：
Resonance complement frequency=fundamental frequency-resonant frequency.
With reference to second aspect, the embodiment of the present application provides the third possible embodiment of second aspect, wherein：Institute
Second processing module is stated, determines damped coefficient, including：
Obtain the generator speed of generator in power grid；
By the generator speed, inquired from the correspondence of generator speed and damped coefficient and the power generation
The corresponding damped coefficient of machine rotating speed.
With reference to second aspect, the embodiment of the present application provides the 4th kind of possible embodiment of second aspect, wherein：Institute
Fourth processing module is stated, is specifically used for：
Rotor voltage d axis set-points are calculated by the following formula：
Rotor voltage d axis set-point=rotor voltage d axis the+the first amount of resistant of bid value；
By second amount of resistant and the rotor voltage q axis bid values, rotor voltage q axis set-points are obtained, including：
Rotor voltage q axis set-points are calculated by the following formula：
Rotor voltage q axis set-point=rotor voltage q axis the+the second amount of resistant of bid value.
A kind of power grid subsynchronous resonance treating method and apparatus provided by the embodiments of the present application, is obtaining rotor voltage d axis
After bid value and rotor voltage q axis bid values, by according to rotor watt current value of feedback and rotor reactive current value of feedback meter
The first obtained amount of resistant carries out damping adjustment to rotor voltage d axis bid value, obtains rotor voltage d axis set-points, and lead to
The second amount of resistant being calculated according to rotor watt current value of feedback and rotor reactive current value of feedback is crossed to rotor voltage q axis
Bid value carries out damping adjustment, obtains rotor voltage q axis set-points, so that subsynchronous to occurring in double-fed wind generating network
Resonance is suppressed；It is and inverse to carry out the voltage d axis set-point of damping adjustment and rotor voltage q axis set-point progress rotational coordinates
Conversion, obtains rotor voltage bid value；Without the circuit structure change to double-fed wind generating network, it is possible to double-fed
The subsynchronous resonance occurred in wind-power electricity generation network is suppressed, do not increase as far as possible the use of double-fed wind generating network into
This.
To enable the above-mentioned purpose of the application, feature and advantage to become apparent, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Brief description of the drawings
, below will be to needed in the embodiment attached in order to illustrate more clearly of the technical solution of the embodiment of the present application
Figure is briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the application, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of flow chart for power grid subsynchronous resonance processing method that the embodiment of the present application 1 is provided；
Fig. 2 shows in the power grid subsynchronous resonance processing method that the embodiment of the present application 1 is provided that generator amature side is controlled
The schematic diagram that device processed handles power grid subsynchronous resonance；
Fig. 3 shows in the power grid subsynchronous resonance processing method that the embodiment of the present application 1 is provided that generator amature side is controlled
Device processed calculates the schematic diagram of the first amount of resistant and the second amount of resistant；
Fig. 4 shows a kind of structure diagram for power grid subsynchronous resonance processing unit that the embodiment of the present application 2 is provided.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
Middle attached drawing, is clearly and completely described the technical solution in the embodiment of the present application, it is clear that described embodiment is only
It is some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is real
Applying the component of example can be arranged and designed with a variety of configurations.Therefore, below to the application's for providing in the accompanying drawings
The detailed description of embodiment is not intended to limit claimed scope of the present application, but is merely representative of the selected reality of the application
Apply example.Based on embodiments herein, institute that those skilled in the art are obtained on the premise of creative work is not made
There is other embodiment, shall fall in the protection scope of this application.
At present, can be in double-fed wind generating in order to suppress to the subsynchronous resonance in double-fed wind generating network
Change the resonant frequency of double-fed wind generating network in network using Static Type Dynamic Reactive Compensation Device or increase capacitance.Adopt
With Static Type Dynamic Reactive Compensation Device or increase capacitance, the circuit structure of double-fed wind generating network can be all caused to change,
Increase the cost that double-fed wind generating network suppresses subsynchronous resonance.Based on this, a kind of power grid that the application provides is subsynchronous humorous
Shake treating method and apparatus.
For ease of understanding the present embodiment, first to a kind of power grid subsynchronous resonance disclosed in the embodiment of the present application
Processing method describes in detail.
In order to preferably be described to the embodiment of the present application, provide and be defined as below：
In the vector control theory of double fed induction generators stator voltage vector oriented, the d direction of principal axis of rotating coordinate system is defined
It is in the same direction with stator voltage vector, counterclockwise it is rotated by 90 °, is defined as q direction of principal axis.The rotating coordinate system of generator amature side
Rotary speed and stator side the poor slip angle of rotating coordinate system, in the rotating coordinate system of rotor-side, rotor current
There are corresponding d axis components and q axis components with rotor voltage, rotor current is controlled by then passing through rotor voltage, so turning
Sub- voltage d axis components and q axis components are the output of whole control ring, then by rotational coordinates inverse transformation reconvert into rotor three
Phase voltage command value, thus controls pusher side pwm converter (power electronic devices), by pwm converter output and bid value one
The voltage of sample is applied on generator amature winding.
So, rotor voltage d/q axis bid value, is the component of the d/q axis of rotor voltage in the rotated coordinate system, is ability
Domain common knowledge.
Rotor voltage d/q axis set-points, are the rotor voltage d/q axis bid values after amount of resistant adjusts.
Embodiment 1
The power grid subsynchronous resonance processing method that the present embodiment proposes, executive agent is generator amature side controller.
The controller can use any processor and microcontroller that can be controlled to generator amature, here not
Repeat again.
The flow of power grid subsynchronous resonance processing method shown in Figure 1, and generator amature shown in Figure 2
The schematic diagram that side controller handles power grid subsynchronous resonance, the present embodiment propose a kind of power grid subsynchronous resonance processing method,
Comprise the following steps：
Step 100, obtain active set-point, active value of feedback, idle set-point, idle value of feedback, rotor watt current
Value of feedback, rotor reactive current value of feedback and rotor slip angle.
In above-mentioned steps 100, active set-point and idle set-point are generator amature side controllers from wind turbine master control
Got in system, and active value of feedback and idle value of feedback are generator amature side controllers according to current transformer network voltage
Sampled value and generator unit stator electric current sampled value are calculated.
Rotor watt current value of feedback and rotor reactive current value of feedback are generator amature side controllers to double-fed wind-force
Current transformer rotor current in power generating network sampled, and by being obtained after rotating coordinate transformation.
Rotor slip angle is that the line voltage angle got by generator amature side controller subtracts rotor electrical angle
Obtain, wherein, line voltage angle is that generator amature side controller locks the angle mutually calculated, rotor electric angle using network voltage
Degree is that generator amature side controller is calculated by detecting the orthogonal pulses of generator encoder.
Step 102, according to above-mentioned active set-point and above-mentioned active value of feedback, obtain rotor watt current set-point, and
According to above-mentioned idle set-point and above-mentioned idle value of feedback, rotor reactive current set-point is obtained.
Here, according to above-mentioned active set-point and above-mentioned active value of feedback, rotor watt current set-point is obtained, including：
Above-mentioned active value of feedback is subtracted by above-mentioned active set-point, obtains a difference, obtained difference is then inputted into two close cycles
In power ring in handled, so as to obtain rotor watt current set-point.
According to above-mentioned idle set-point and above-mentioned idle value of feedback, obtain the process of rotor reactive current set-point with it is above-mentioned
According to above-mentioned active set-point and above-mentioned active value of feedback, it is similar to obtain the process of rotor watt current set-point, here no longer
Repeat.
Step 104, according to above-mentioned rotor watt current value of feedback and above-mentioned rotor reactive current value of feedback, calculate respectively
One amount of resistant and the second amount of resistant.
Wherein, the first amount of resistant is the amount of resistant for being adjusted to rotor voltage d axis bid values, and the second amount of resistant is
For the amount of resistant being adjusted to rotor voltage q axis bid values.
Generator amature side controller shown in Figure 3 calculates the schematic diagram of the first amount of resistant and the second amount of resistant；Tool
Body, above-mentioned steps 104 can be including step (1) in detail below to step (6)：
(1) damped coefficient is determined；
(2) network voltage is sampled, obtains the resonant frequency of above-mentioned network voltage, and above-mentioned network voltage is carried out
Phase is locked, obtains the fundamental frequency of above-mentioned network voltage；
(3) according to the resonant frequency and fundamental frequency of above-mentioned network voltage, the resonance for calculating above-mentioned network voltage is complementary frequently
Rate；
(4) it is anti-to above-mentioned rotor watt current value of feedback and above-mentioned rotor reactive current according to above-mentioned resonance complement frequency
Feedback value is filtered operation, obtains the above-mentioned rotor watt current value of feedback under above-mentioned resonance complement frequency and the complementation of above-mentioned resonance
Above-mentioned rotor reactive current value of feedback under frequency；
(5) multiplying for above-mentioned rotor watt current value of feedback under above-mentioned resonance complement frequency and above-mentioned damped coefficient is calculated
Product, obtains above-mentioned first amount of resistant；
(6) multiplying for above-mentioned rotor reactive current value of feedback under above-mentioned resonance complement frequency and above-mentioned damped coefficient is calculated
Product, obtains above-mentioned second amount of resistant.
Above-mentioned steps (1) specifically include following steps (11) to step (12)：
(11) generator speed of generator in power grid is obtained；
(12) by above-mentioned generator speed, inquired from the correspondence of generator speed and damped coefficient with it is above-mentioned
The corresponding damped coefficient of generator speed.
In above-mentioned steps (11), the generator speed of generator is got from the current transformer in fan master control system
's.Encoder is installed, current transformer monitors the orthogonal pulses signal of the encoder, calculated by the signal on generator amature
Generator speed.
In above-mentioned steps (12), in the correspondence of generator speed and damped coefficient, generator speed is higher, right
The damped coefficient answered is with regard to smaller.
In above-mentioned steps (3), the resonance complement frequency of above-mentioned network voltage is calculated by the following formula：
Resonance complement frequency=fundamental frequency-resonant frequency.
In above-mentioned steps (4), comprise the following steps (41) to step (42)：
(41) according to above-mentioned resonance complement frequency, the parameter of bandpass filter is adjusted；
(42) by the above-mentioned bandpass filter after parameter adjustment, to above-mentioned rotor watt current value of feedback and above-mentioned rotor
Reactive current value of feedback is filtered operation, obtains above-mentioned rotor watt current value of feedback under above-mentioned resonance complement frequency and upper
State the above-mentioned rotor reactive current value of feedback under resonance complement frequency.
Above-mentioned bandpass filter is arranged in the form of software in generator amature side controller.
Above-mentioned bandpass filter can be but not limited to：Second order digital bandpass filter, Chebyshev's digital filter, with
And Butterworth bandpass filter.
Above-mentioned steps (41), including in detail below step (411) to step (412)：
(411) by the resonance complement frequency of above-mentioned network voltage, from resonance complement frequency and bandpass filter parameter pair
Bandpass filter parameter corresponding with above-mentioned resonance complement frequency is inquired in should being related to；
(412) by the bandpass filter parameter inquired, the parameter of above-mentioned bandpass filter is adjusted.
It can be seen that by the process of the first amount of resistant derived above and the second amount of resistant and adjusted according to resonant frequency, dynamic
Whole band acceptor parameter, avoids the phase offset of amount of resistant, and maximum is still maintained in the case where resonant frequency changes
Output damping, since resonant frequency changes with the increase of grid-connected wind turbine number of units, it is therefore desirable to real-time lock resonant frequency, and
Trap parameter is adjusted according to resonant frequency, avoids bandpass filter from exporting angled offset.
After the first amount of resistant and the second amount of resistant is calculated by above step 104, following step can be continued through
Rapid 106 obtain rotor voltage d axis bid value and rotor voltage q axis bid values.
Step 106, according to above-mentioned rotor watt current value of feedback and above-mentioned rotor watt current set-point, obtain rotor electricity
D axis bid values are pressed, and according to above-mentioned rotor reactive current value of feedback and above-mentioned rotor reactive current set-point, obtain rotor voltage
Q axis bid values.
Here, according to above-mentioned rotor watt current value of feedback and above-mentioned rotor watt current set-point, electric current loop ratio is passed through
Example integral controller, obtains rotor voltage d axis bid values, including：Above-mentioned turn is subtracted by above-mentioned rotor watt current set-point
Sub- watt current value of feedback, obtains a difference, then by obtained difference input current ring pi controller
Reason, so as to obtain rotor voltage d axis bid values.
According to above-mentioned rotor reactive current value of feedback and above-mentioned rotor reactive current set-point, rotor voltage q axis life is obtained
Value is made with according to above-mentioned rotor watt current value of feedback and above-mentioned rotor watt current set-point, obtaining rotor voltage d axis orders
The process of value is similar, and which is not described herein again.
Step 108, according to above-mentioned first amount of resistant and above-mentioned rotor voltage d axis bid values, obtain rotor voltage d axis and give
Value, and according to above-mentioned second amount of resistant and above-mentioned rotor voltage q axis bid values, obtain rotor voltage q axis set-points.
Specifically, according to above-mentioned first amount of resistant and above-mentioned rotor voltage d axis bid values, obtain rotor voltage d axis and give
Value, including：
Rotor voltage d axis set-points are calculated by the following formula：
Rotor voltage d axis set-point=rotor voltage d axis the+the first amount of resistant of bid value；
According to above-mentioned second amount of resistant and above-mentioned rotor voltage q axis bid values, rotor voltage q axis set-points are obtained, including：
Rotor voltage q axis set-points are calculated by the following formula：
Rotor voltage q axis set-point=rotor voltage q axis the+the second amount of resistant of bid value.
Step 110, based on above-mentioned rotor slip angle, to above-mentioned rotor voltage d axis set-point and above-mentioned rotor voltage q axis
Set-point carries out rotational coordinates inverse transformation, obtains rotor voltage bid value.
In conclusion a kind of power grid subsynchronous resonance processing method provided in this embodiment, is obtaining rotor voltage d axis life
After making value and rotor voltage q axis bid values, by being calculated according to rotor watt current value of feedback and rotor reactive current value of feedback
The first obtained amount of resistant carries out damping adjustment to rotor voltage d axis bid value, obtains rotor voltage d axis set-points, and pass through
Rotor voltage q axis is ordered according to the second amount of resistant that rotor watt current value of feedback and rotor reactive current value of feedback are calculated
Make value carry out damping adjustment, obtain rotor voltage q axis set-points, so that subsynchronous humorous to what is occurred in double-fed wind generating network
Shake and suppressed；And carry out rotational coordinates inversion to carry out the voltage d axis set-point of damping adjustment and rotor voltage q axis set-point
Change, obtain rotor voltage bid value；Without the circuit structure change to double-fed wind generating network, it is possible to double-fed wind
The subsynchronous resonance occurred in power power generation network is suppressed, and does not increase the use cost of double-fed wind generating network as far as possible.
Embodiment 2
The present embodiment proposes a kind of power grid subsynchronous resonance processing unit, for performing at above-mentioned power grid subsynchronous resonance
Reason method.
The structure of power grid subsynchronous resonance processing unit shown in Figure 4, power grid subsynchronous resonance processing unit include：
Acquisition module 400, for obtaining active set-point, active value of feedback, idle set-point, idle value of feedback, rotor
Watt current value of feedback, rotor reactive current value of feedback and rotor slip angle；
First processing module 402, for according to above-mentioned active set-point and above-mentioned active value of feedback, obtaining the active electricity of rotor
Set-point is flowed, and according to above-mentioned idle set-point and above-mentioned idle value of feedback, obtains rotor reactive current set-point；
Second processing module 404, for according to above-mentioned rotor watt current value of feedback and above-mentioned rotor reactive current feedback
Value, calculates the first amount of resistant and the second amount of resistant respectively；
3rd processing module 406, for being given according to above-mentioned rotor watt current value of feedback and above-mentioned rotor watt current
Value, obtains rotor voltage d axis bid values, and give according to above-mentioned rotor reactive current value of feedback and above-mentioned rotor reactive current
Value, obtains rotor voltage q axis bid values；
Fourth processing module 408, for according to above-mentioned first amount of resistant and above-mentioned rotor voltage d axis bid values, being turned
Sub- voltage d axis set-points, and according to above-mentioned second amount of resistant and above-mentioned rotor voltage q axis bid values, obtain rotor voltage q axis to
Definite value；
5th processing module 410, for based on above-mentioned rotor slip angle, to above-mentioned rotor voltage d axis set-point and upper
State rotor voltage q axis set-point and carry out rotational coordinates inverse transformation, obtain rotor voltage bid value.
Specifically, above-mentioned Second processing module 404, is specifically used for：
Determine damped coefficient；
Network voltage is sampled, obtains the resonant frequency of above-mentioned network voltage, and above-mentioned network voltage is locked
Phase, obtains the fundamental frequency of above-mentioned network voltage；
According to the resonant frequency and fundamental frequency of above-mentioned network voltage, the resonance complement frequency of above-mentioned network voltage is calculated；
According to above-mentioned resonance complement frequency, to above-mentioned rotor watt current value of feedback and above-mentioned rotor reactive current value of feedback
Operation is filtered, obtains the above-mentioned rotor watt current value of feedback under above-mentioned resonance complement frequency and above-mentioned resonance complement frequency
Under above-mentioned rotor reactive current value of feedback；
The product of the above-mentioned rotor watt current value of feedback and above-mentioned damped coefficient under above-mentioned resonance complement frequency is calculated, is obtained
To above-mentioned first amount of resistant；
The product of the above-mentioned rotor reactive current value of feedback and above-mentioned damped coefficient under above-mentioned resonance complement frequency is calculated, is obtained
To above-mentioned second amount of resistant.
Specifically, above-mentioned Second processing module 404, according to the resonant frequency and fundamental frequency of above-mentioned network voltage, calculates
The resonance complement frequency of above-mentioned network voltage, including：
The resonance complement frequency of above-mentioned network voltage is calculated by the following formula：
Resonance complement frequency=fundamental frequency-resonant frequency.
Specifically, above-mentioned Second processing module 404, determines damped coefficient, including：
Obtain the generator speed of generator in power grid；
By above-mentioned generator speed, inquired from the correspondence of generator speed and damped coefficient and above-mentioned power generation
The corresponding damped coefficient of machine rotating speed.
Specifically, above-mentioned fourth processing module 408, is specifically used for：
Rotor voltage d axis set-points are calculated by the following formula：
Rotor voltage d axis set-point=rotor voltage d axis the+the first amount of resistant of bid value；
By above-mentioned second amount of resistant and above-mentioned rotor voltage q axis bid values, rotor voltage q axis set-points are obtained, including：
Rotor voltage q axis set-points are calculated by the following formula：
Rotor voltage q axis set-point=rotor voltage q axis the+the second amount of resistant of bid value.
In conclusion a kind of power grid subsynchronous resonance processing unit provided in this embodiment, is obtaining rotor voltage d axis life
After making value and rotor voltage q axis bid values, by being calculated according to rotor watt current value of feedback and rotor reactive current value of feedback
The first obtained amount of resistant carries out damping adjustment to rotor voltage d axis bid value, obtains rotor voltage d axis set-points, and pass through
Rotor voltage q axis is ordered according to the second amount of resistant that rotor watt current value of feedback and rotor reactive current value of feedback are calculated
Make value carry out damping adjustment, obtain rotor voltage q axis set-points, so that subsynchronous humorous to what is occurred in double-fed wind generating network
Shake and suppressed；And carry out rotational coordinates inversion to carry out the voltage d axis set-point of damping adjustment and rotor voltage q axis set-point
Change, obtain rotor voltage bid value；Without the circuit structure change to double-fed wind generating network, it is possible to double-fed wind
The subsynchronous resonance occurred in power power generation network is suppressed, and does not increase the use cost of double-fed wind generating network as far as possible.
The computer program product for the progress power grid subsynchronous resonance processing method that the embodiment of the present application is provided, including deposit
The computer-readable recording medium of program code is stored up, the instruction that said program code includes can be used for performing previous methods implementation
Method described in example, specific implementation can be found in embodiment of the method, and details are not described herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, can be with
Realize by another way.Device embodiment described above is only schematical, for example, the division of the unit,
Only a kind of division of logic function, can there is other dividing mode when actually realizing, in another example, multiple units or component can
To combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be by some communication interfaces, device or unit it is indirect
Coupling or communication connection, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units integrate in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, the technical solution of the application is substantially in other words
The part to contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server, or network equipment etc.) perform each embodiment the method for the application all or part of step.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
The above, is only the embodiment of the application, but the protection domain of the application is not limited thereto, any
Those familiar with the art can readily occur in change or replacement in the technical scope that the application discloses, and should all contain
Cover within the protection domain of the application.Therefore, the protection domain of the application answers the scope of the claims of being subject to.
Claims (10)
- A kind of 1. power grid subsynchronous resonance processing method, it is characterised in that including：Obtain active set-point, active value of feedback, idle set-point, idle value of feedback, rotor watt current value of feedback, rotor without Work(current feedback values and rotor slip angle；According to the active set-point and the active value of feedback, rotor watt current set-point is obtained, and according to described idle Set-point and the idle value of feedback, obtain rotor reactive current set-point；According to the rotor watt current value of feedback and the rotor reactive current value of feedback, the first amount of resistant and are calculated respectively Two amount of resistant；According to the rotor watt current value of feedback and the rotor watt current set-point, rotor voltage d axis bid values are obtained, And according to the rotor reactive current value of feedback and the rotor reactive current set-point, obtain rotor voltage q axis bid values；According to first amount of resistant and the rotor voltage d axis bid values, rotor voltage d axis set-points are obtained, and according to institute The second amount of resistant and the rotor voltage q axis bid values are stated, obtains rotor voltage q axis set-points；Based on the rotor slip angle, the rotor voltage d axis set-point and the rotor voltage q axis set-points are revolved Turn coordinate inversion, obtain rotor voltage bid value.
- 2. according to the method described in claim 1, it is characterized in that, according to the rotor watt current value of feedback and the rotor Reactive current value of feedback, calculates the first amount of resistant and the second amount of resistant respectively, including：Determine damped coefficient；Network voltage is sampled, obtains the resonant frequency of the network voltage, and the network voltage is obtained into horizontal lock To the fundamental frequency of the network voltage；According to the resonant frequency and fundamental frequency of the network voltage, the resonance complement frequency of the network voltage is calculated；According to the resonance complement frequency, the rotor watt current value of feedback and the rotor reactive current value of feedback are carried out Filtering operation, obtains under the rotor watt current value of feedback and the resonance complement frequency under the resonance complement frequency The rotor reactive current value of feedback；The product of the rotor watt current value of feedback and the damped coefficient under the resonance complement frequency is calculated, obtains institute State the first amount of resistant；The product of the rotor reactive current value of feedback and the damped coefficient under the resonance complement frequency is calculated, obtains institute State the second amount of resistant.
- 3. according to the method described in claim 2, it is characterized in that, according to the resonant frequency of the network voltage and fundamental wave frequency Rate, calculates the resonance complement frequency of the network voltage, including：The resonance complement frequency of the network voltage is calculated by the following formula：Resonance complement frequency=fundamental frequency-resonant frequency.
- 4. according to the method described in claim 2, it is characterized in that, determine damped coefficient, including：Obtain the generator speed of generator in power grid；By the generator speed, inquire from the correspondence of generator speed and damped coefficient and turn with the generator The corresponding damped coefficient of speed.
- 5. according to the method described in claim 1, it is characterized in that, according to first amount of resistant and the rotor voltage d axis Bid value, obtains rotor voltage d axis set-points, including：Rotor voltage d axis set-points are calculated by the following formula：Rotor voltage d axis set-point=rotor voltage d axis the+the first amount of resistant of bid value；According to second amount of resistant and the rotor voltage q axis bid values, rotor voltage q axis set-points are obtained, including：Rotor voltage q axis set-points are calculated by the following formula：Rotor voltage q axis set-point=rotor voltage q axis the+the second amount of resistant of bid value.
- A kind of 6. power grid subsynchronous resonance processing unit, it is characterised in that including：Acquisition module, for obtaining active set-point, active value of feedback, idle set-point, idle value of feedback, rotor watt current Value of feedback, rotor reactive current value of feedback and rotor slip angle；First processing module, for according to the active set-point and the active value of feedback, obtaining rotor watt current and giving Value, and according to the idle set-point and the idle value of feedback, obtain rotor reactive current set-point；Second processing module, for according to the rotor watt current value of feedback and the rotor reactive current value of feedback, difference Calculate the first amount of resistant and the second amount of resistant；3rd processing module, for according to the rotor watt current value of feedback and the rotor watt current set-point, obtaining Rotor voltage d axis bid values, and according to the rotor reactive current value of feedback and the rotor reactive current set-point, turned Sub- voltage q axis bid values；Fourth processing module, for according to first amount of resistant and the rotor voltage d axis bid values, obtaining rotor voltage d Axis set-point, and according to second amount of resistant and the rotor voltage q axis bid values, obtain rotor voltage q axis set-points；5th processing module, for based on the rotor slip angle, to the rotor voltage d axis set-point and rotor electricity Press q axis set-point to carry out rotational coordinates inverse transformation, obtain rotor voltage bid value.
- 7. device according to claim 6, it is characterised in that the Second processing module, is specifically used for：Determine damped coefficient；Network voltage is sampled, obtains the resonant frequency of the network voltage, and the network voltage is obtained into horizontal lock To the fundamental frequency of the network voltage；According to the resonant frequency and fundamental frequency of the network voltage, the resonance complement frequency of the network voltage is calculated；According to the resonance complement frequency, the rotor watt current value of feedback and the rotor reactive current value of feedback are carried out Filtering operation, obtains under the rotor watt current value of feedback and the resonance complement frequency under the resonance complement frequency The rotor reactive current value of feedback；The product of the rotor watt current value of feedback and the damped coefficient under the resonance complement frequency is calculated, obtains institute State the first amount of resistant；The product of the rotor reactive current value of feedback and the damped coefficient under the resonance complement frequency is calculated, obtains institute State the second amount of resistant.
- 8. device according to claim 7, it is characterised in that the Second processing module, according to the network voltage Resonant frequency and fundamental frequency, calculate the resonance complement frequency of the network voltage, including：The resonance complement frequency of the network voltage is calculated by the following formula：Resonance complement frequency=fundamental frequency-resonant frequency.
- 9. device according to claim 7, it is characterised in that the Second processing module, determines damped coefficient, including：Obtain the generator speed of generator in power grid；By the generator speed, inquire from the correspondence of generator speed and damped coefficient and turn with the generator The corresponding damped coefficient of speed.
- 10. device according to claim 6, it is characterised in that the fourth processing module, is specifically used for：Rotor voltage d axis set-points are calculated by the following formula：Rotor voltage d axis set-point=rotor voltage d axis the+the first amount of resistant of bid value；By second amount of resistant and the rotor voltage q axis bid values, rotor voltage q axis set-points are obtained, including：Rotor voltage q axis set-points are calculated by the following formula：Rotor voltage q axis set-point=rotor voltage q axis the+the second amount of resistant of bid value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11411519B2 (en) | 2018-10-05 | 2022-08-09 | Vestas Wind Systems A/S | Method for handling sub-synchronous resonances |
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| CN102570962A (en) * | 2012-02-03 | 2012-07-11 | 阳光电源股份有限公司 | Double-fed wind power generation high-voltage through control structure, and generator and generation system providing with double-fed wind power generation high-voltage through control structure |
| CN103166238B (en) * | 2013-03-07 | 2015-07-22 | 合肥工业大学 | Doubly fed wind power generator control structure under asymmetric sudden rise of power grid voltage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102570962A (en) * | 2012-02-03 | 2012-07-11 | 阳光电源股份有限公司 | Double-fed wind power generation high-voltage through control structure, and generator and generation system providing with double-fed wind power generation high-voltage through control structure |
| CN103166238B (en) * | 2013-03-07 | 2015-07-22 | 合肥工业大学 | Doubly fed wind power generator control structure under asymmetric sudden rise of power grid voltage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11411519B2 (en) | 2018-10-05 | 2022-08-09 | Vestas Wind Systems A/S | Method for handling sub-synchronous resonances |
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