CN105790288B - Inhibit the control method and device of subsynchronous resonance - Google Patents
Inhibit the control method and device of subsynchronous resonance Download PDFInfo
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- CN105790288B CN105790288B CN201610265094.4A CN201610265094A CN105790288B CN 105790288 B CN105790288 B CN 105790288B CN 201610265094 A CN201610265094 A CN 201610265094A CN 105790288 B CN105790288 B CN 105790288B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000013016 damping Methods 0.000 claims abstract description 106
- 230000001629 suppression Effects 0.000 claims abstract description 19
- 230000010363 phase shift Effects 0.000 claims abstract description 14
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 19
- 239000003990 capacitor Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 8
- 230000005764 inhibitory process Effects 0.000 description 11
- 238000011217 control strategy Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- Control Of Ac Motors In General (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of control method and device inhibiting subsynchronous resonance, wherein this method includes：Select the input signal of additional damping controller；Determine the on-position of additional damping controller；Input signal is filtered, ratio phase shift and amplitude limit obtain output control signal；According to output control signal and on-position suppression system subsynchronous resonance.The subsynchronous resonance of the effective suppression system of this method, ensure that wind turbine and the safe and stable operation of system.The invention also provides a kind of control devices inhibiting subsynchronous resonance.
Description
Technical field
The present invention relates to technical field of electric power system control more particularly to it is a kind of inhibit subsynchronous resonance control method and
Device.
Background technology
In recent years, the scale of China's wind-power electricity generation sustained and rapid development, wind power plant also constantly expands.Double-fed wind generating
Unit is widely used in its flexible control characteristic in wind generator system.Doubly-fed wind turbine (DFIG-Doubly-
Fed Induction Generator) it is exchanged using two voltage source converters that are back-to-back, being connected by DC link
Excitation.Wherein, the converter being connected with DFIG rotors is known as rotor-side converter (RSC-Rotor Side Convertor), right
The control of RSC can be realized to the output active and reactive power control of DFIG stators；The converter being connected with DFIG stators is known as net side
Converter (GSC-Grid Side Convertor) can realize the control of GSC and keep DC bus-bar voltage stabilization, guarantee defeated
Enter current sinusoidal and control input power factor.
Studies have shown that when double-fed wind power generator group conveys wind-powered electricity generation by series capacitor compensated line outward, it may
Cause serious Sub-synchronous Resonance (SSR-Subsynchronous Resonance), compared to other kinds of generator
Group is easier to lead to SSR risks with the wind power plant compensated transmission system that double-fed wind power generator group is leading unit.Moreover, double
The SSR problems that feedback wind power plant occurs mainly are led by the interaction between dual-feedback wind power generator control system and fixed series compensation
It causes, characteristic is extremely complex, and wind speed, equivalent series compensation degrees, board number and the convertor controls parameter of generating electricity by way of merging two or more grid systems all can be to SSR spies
Property has an impact, therefore how effectively to inhibit double-fed fan motor field SSR problems there are no good solutions.
Invention content
The purpose of the present invention is intended to solve above-mentioned one of technical problem at least to a certain extent.
For this purpose, first purpose of the present invention is to propose a kind of control method inhibiting subsynchronous resonance.This method has
The subsynchronous resonance for imitating suppression system, ensure that wind turbine and the safe and stable operation of system.
Second object of the present invention is to propose a kind of control device inhibiting subsynchronous resonance.
In order to achieve the above object, the control method of the inhibition subsynchronous resonance of first aspect present invention embodiment, including：Selection
The input signal of additional damping controller；Determine the on-position of the additional damping controller；The input signal is carried out
Filtering, ratio phase shift and amplitude limit obtain output control signal；Signal is controlled according to the output and the on-position inhibits system
System subsynchronous resonance.
The control method of the inhibition subsynchronous resonance of the embodiment of the present invention selects the input letter of additional damping controller first
Number, then determine the on-position of additional damping controller, and input signal is filtered, ratio phase shift and amplitude limit obtain it is defeated
Go out and control signal, finally according to output control signal and the on-position suppression system subsynchronous resonance.This method effectively presses down
The subsynchronous resonance of system processed ensure that wind turbine and the safe and stable operation of system.
In some instances, the input signal of the selection additional damping controller specifically includes：
The input signal of the additional damping controller of rotor-side converter includes：Rotor current d axis components i1d, q axis components
i1q, stator current d axis components i2d, q axis components i2q, rotor speed ω1r, stator side current transformer output reactive power Q1s, wind
The active-power P of machine stator side output1LWith series capacitor both end voltage V1CIn single input signal or multiple input signal
Combination；The input signal of the additional damping controller of grid side converter includes：Rotor current d axis components i3d, q axis components i3q、
Stator current d axis components i4d, q axis components i4q, rotor speed ω2r, DC bus-bar voltage Vdc, generator set end voltage Vs, wind
The active-power P of machine stator side output2LWith series capacitor both end voltage V2CIn single input signal or multiple input signal
Combination.
In some instances, described the input signal is filtered, ratio phase shift and amplitude limit obtain output control letter
It number specifically includes：Pass through bandpass filter either high-pass filter or the series connection of the bandpass filter and the high-pass filter
Combination is filtered the input signal；Pass through phase shifter either proportional component or the phase shifter and the proportional component
Tandem compound carries out amplitude proportion adjusting to the filtered input signal and phase delay compensates；To the amplitude proportion tune
Input signal after section and phase delay compensation carries out amplitude limit and obtains output control signal.
In some instances, the on-position of the additional damping controller is according to the input for selecting additional damping controller
Signal determines；The additional damping controller individually/while being linked into the different positions of rotor-side converter or/and grid side converter
It sets.
In some instances, the transmission function of the bandpass filter is：Its
In, ωc1For subsynchronous resonance frequency；ξ1Transmission function for damping ratio, the high-pass filter is：Wherein, ξ2For damped coefficient；The amplitude proportion adjusts and the transmission letter of phase delay compensation
Number is：Wherein, g indicates proportionality coefficient；T indicates that time constant, m take integer of 1 to 3；The amplitude limit
Formula is：Wherein, XinIndicate the additional control signals of amplitude limit link input, XoutTable
Show the reality output control signal of amplitude limit link, Xmax、XminIndicate that additional damping controller is acceptable maximum, minimum defeated respectively
Go out control signal value, i.e. Xmax、XminThe upper limit value and lower limiting value of preset range are indicated respectively.
In order to achieve the above object, the control device of the inhibition subsynchronous resonance of second aspect of the present invention embodiment, including：Selection
Module, the input signal for selecting additional damping controller；Determining module, for determining connecing for the additional damping controller
Enter position；Processing module, for being filtered to the input signal, ratio phase shift and amplitude limit obtain output control signal；Suppression
Molding block, for controlling signal and the on-position suppression system subsynchronous resonance according to the output.
The control device of the inhibition subsynchronous resonance of the embodiment of the present invention selects the input letter of additional damping controller first
Number, then determine the on-position of additional damping controller, and input signal is filtered, ratio phase shift and amplitude limit obtain it is defeated
Go out and control signal, finally according to output control signal and the on-position suppression system subsynchronous resonance.The device effectively presses down
The subsynchronous resonance of system processed ensure that wind turbine and the safe and stable operation of system.
In some instances, the selecting module is specifically used for：The input of the additional damping controller of rotor-side converter
Signal includes：Rotor current d axis components i1d, q axis components i1q, stator current d axis components i2d, q axis components i2q, rotor speed
ω1r, stator side current transformer output reactive power Q1s, fan stator side output active-power P1LWith series capacitor both ends
Voltage V1CIn single input signal or multiple input signal combination；The input signal of the additional damping controller of grid side converter
Including：Rotor current d axis components i3d, q axis components i3q, stator current d axis components i4d, q axis components i4q, rotor speed ω2r, it is straight
Flow busbar voltage Vdc, generator set end voltage Vs, fan stator side output active-power P2LWith series capacitor both ends electricity
Press V2CIn single input signal or multiple input signal combination.
In some instances, the processing module is specifically used for：Pass through bandpass filter either high-pass filter or institute
It states bandpass filter and the high-pass filter tandem compound is filtered the input signal；Pass through phase shifter or ratio
Link or the phase shifter and the proportional component tandem compound carry out amplitude proportion tune to the filtered input signal
Section and phase delay compensation；Amplitude limit is carried out to the input signal after amplitude proportion adjusting and phase delay compensation to be exported
Control signal.
In some instances, the on-position of the additional damping controller is according to the input for selecting additional damping controller
Signal determines；The additional damping controller individually/while being linked into the different positions of rotor-side converter or/and grid side converter
It sets.
In some instances, the transmission function of the bandpass filter is：Its
In, ωc1For subsynchronous resonance frequency；ξ1Transmission function for damping ratio, the high-pass filter is：Wherein, ξ2For damped coefficient；The amplitude proportion adjusts and the transmission function of phase delay compensation
For：Wherein, g indicates proportionality coefficient；T indicates that time constant, m take integer of 1 to 3；The amplitude limit is public
Formula is：Wherein, XinIndicate the additional control signals of amplitude limit link input, XoutIt indicates
The reality output of amplitude limit link controls signal, Xmax、XminAcceptable maximum, the minimum output of additional damping controller is indicated respectively
Control signal value, i.e. Xmax、XminThe upper limit value and lower limiting value of preset range are indicated respectively.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the overall structure diagram of additional longitudinal forces system according to an embodiment of the invention；
Fig. 2 is the flow chart of the control method according to an embodiment of the invention for inhibiting subsynchronous resonance；
Fig. 3 (a) is the position view of additional damping controller access GSC according to an embodiment of the invention；
Fig. 3 (b) is the position view of additional damping controller access RSC according to an embodiment of the invention；
Fig. 4 is the schematic diagram of additional damping controller according to an embodiment of the invention；
Fig. 5 is the signal structure schematic diagram of additional damping controller according to an embodiment of the invention；
Fig. 6 is the structural schematic diagram of the controller according to an embodiment of the invention for inhibiting subsynchronous resonance.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
By the supplementary subsynchronous damping control device on double-fed fan stator side or/and rotor-side converter or in current transformer
Control strategy in introduce additional longitudinal forces link, and then double-fed blower interior introduce to subsynchronous resonance rise positive damping make
Additional control amount, can effectively suppression system subsynchronous resonance, ensure wind turbine and system safe and stable operation.
Fig. 1 is combined to understand the overall structure diagram of additional longitudinal forces system first.
Additional damping controller can access GSC or/and RSC control systems.On realization method, additional damping controller
Additional hardware DeviceMode may be used, that is, use independent control device and controlled output signal access GSC or/and RSC
Control system is realized；Embedded software mode can also be used, i.e., in addition hardware is not set, only need in double-fed wind turbine GSC or/and
Increase corresponding control software (code) inside RSC control systems to realize.
The basic functional principle of additional longitudinal forces is, by reasonably selecting the input signal of additional damping controller,
The links such as filtered, ratio/phase shift, amplitude limit play the attached of positive damping in the introducing of double-fed blower interior to subsynchronous resonance
Add controlled quentity controlled variable so that positive electrical damping is provided to system under the oscillation mode of subsynchronous frequency, to reach effective inhibition
The purpose of system subsynchronous resonance.Therefore, additional damping controller, which is introduced, plays positive damping to subsynchronous resonance and adds
Controlled quentity controlled variable can effectively inhibit system subsynchronous resonance.
Fig. 2 is the flow chart of the control method according to an embodiment of the invention for inhibiting subsynchronous resonance.
As shown in Fig. 2, the control method of the inhibition subsynchronous resonance may include：
S101 selects the input signal of additional damping controller.
Firstly the need of the input signal of selection additional damping controller, single input signal or multiple input can be selected to believe
Number combination.Below with the additional damping control of the input signal of the additional damping controller of rotor-side converter and grid side converter
The input signal of device processed illustrates.
Specifically, in some instances, the input signal of the additional damping controller of rotor-side converter includes：Rotor electricity
Flow d axis components i1d, q axis components i1q, stator current d axis components i2d, q axis components i2q, rotor speed ω1r, stator side current transformer
The reactive power Q of output1s, fan stator side output active-power P1LWith series capacitor both end voltage V1CIt is middle a kind of or more
Kind combination；
Specifically, in some instances, the input signal of the additional damping controller of grid side converter includes：Rotor current
D axis components i3d, q axis components i3q, stator current d axis components i4d, q axis components i4q, rotor speed ω2r, DC bus-bar voltage Vdc、
The set end voltage V of generators, fan stator side output active-power P2LWith series capacitor both end voltage V2CIt is middle a kind of or more
Kind combination.
It should be noted that single or multiple variable can accordingly be selected according to control strategy different in real system
Input signal as additional damping controller.It can also be by other signal acquiring systems, as collected in Wide Area Measurement System
Input signal of a large amount of feedback signals as additional damping controller, but need to consider the time delay of signal acquiring system.
S102 determines the on-position of additional damping controller.
First, the inhibiting effect of subsynchronous resonance and additional damping controller on-position are closely related, and selection is suitable
The on-position of additional damping controller can be provided about more positive dampings in resonant frequency, can effectively suppression system it is subsynchronous
Resonance, therefore the control strategy of stator current transformer and rotor current transformer is combined, it needs reasonably to select additional damping controller
On-position.
Wherein, the on-position of additional damping controller is determined according to the input signal of selection additional damping controller；It is attached
Damping controller is added to have sole access to the different location of rotor-side converter or grid side converter.
It should be noted that the selection of additional damping controller on-position needs to meet following principle：In resonant frequency
Be provided about enough positive dampings, can effectively suppression system subsynchronous resonance；Resistance of the system to other operational modes is not influenced
Buddhist nun acts on, and ensures the safe and stable operation of system.
The on-position of additional damping controller is described in detail in conjunction with Fig. 3 (a) and 3 (b), with reference to attached drawing 3 (a) and 3 (b) institute
Show, attached drawing 3 (a) is the position view that additional longitudinal forces access GSC control systems, and attached drawing 3 (b) connects for additional longitudinal forces
Enter the position view of RSC control systems.Believed according to the input of the different additional damping controllers of above-mentioned selection in the present invention
Number, the on-position for choosing additional damping controller can be corresponded to.Additional damping controller can have sole access to RSC or GSC controls
The different places of device processed, as shown in Fig. 3, GSC control ring interior locations have 6, are the position positions A1- F1 respectively；RSC is controlled
Ring interior location has 6, is the position positions A2- F2 respectively, these points can be as the on-position of additional longitudinal forces.
S103 is filtered input signal, ratio phase shift and amplitude limit obtain output control signal.
Specifically, pass through bandpass filter either high-pass filter or bandpass filter and high-pass filter tandem compound
Input signal is filtered；By phase shifter after either proportional component or phase shifter and proportional component tandem compound are to filtering
Input signal carry out amplitude proportion adjust and phase delay compensation；Input signal after compensating phase delay carries out amplitude limit and obtains
Control signal must be exported.
The transmission function of bandpass filter is：Wherein, ωc1For subsynchronous resonance
Frequency；ξ1For damping ratio.The transmission function of high-pass filter is：Wherein, ξ2For damped coefficient.
Phase delay compensation transmission function be：Wherein, g indicates proportionality coefficient；T indicates time constant, m
Take integer of 1 to 3.Amplitude limit formula is：Wherein, XinIndicate amplitude limit link input
Additional control signals, XoutIndicate that the reality output of amplitude limit link controls signal, Xmax、XminAdditional damping controller is indicated respectively
Acceptable maximum, minimum output control signal value, i.e. Xmax、XminThe upper limit value and lower limiting value of preset range are indicated respectively.
Signal filtering is first carried out in conjunction with Fig. 4 detailed descriptions.The purpose of the link is filtered from the input signal of selection
Non- subsynchronous frequency component filters out required subsynchronous frequency component, improves additional longitudinal forces in subsynchronous resonance frequency
Damping under rate, while reducing influence of the additional damping controller to stable operation when as far as possible, bandpass filtering can be used
Device either realize by the tandem compound of high-pass filter or bandpass filter and high-pass filter.：
It should be noted that bandpass filter, it is therefore an objective to filter out subsynchronous frequency component of interest, while improve attached
Add damping of the damping control under subsynchronous resonance frequency, implementation method various.
It should be noted that high-pass filter, it is therefore an objective to filter out interference (such as abc three-phase main-frequencies of low-frequency component in signal
The DC component that signal is converted into after dq is decomposed), required high frequency subsynchronous resonance frequency is filtered out, additional resistance is minimized
Amplitude gain of the transmission function under non-subsynchronous resonance frequency, way of realization are various in Buddhist nun's controller.It should be noted that moving
Phase device, it is therefore an objective to the phase delay of filter be compensated, and necessary phase offset is set according to control strategy, realized
Method is various, for example high-pass/low-pass filtering type phase shifter.
It should be noted that proportional component, it is therefore an objective to carry out amplitude compensation appropriate to required signal.
It should be noted that the purpose of amplitude limit is the output control signal progress amplitude limiting processing to additional damping controller,
So that the output control signal amplitude of additional damping controller is located in setting range.Specifically, amplitude limit link mainly limits
The amplitude of the output control signal of additional damping controller processed, in order to avoid overshoot, it is therefore desirable to letter is controlled to the output after phase shift
Number carry out amplitude limiting processing, the purpose is to by the output of additional damping controller control signal limiting in a certain range, when defeated
When going out to control upper limit value of the signal higher than preset range or the lower limiting value less than preset range, actual output controls signal will be by
It is limited to a certain steady state value, and is not changed with the variation of input signal, wherein the steady state value is located in preset range.
S104, according to output control signal and the on-position suppression system subsynchronous resonance.
In all selectable input signals, it can only select one of them as input signal, it can also be according to reality
The operating condition of border system selects multiple and different variables as input signal；Consider multiple and different on-positions simultaneously.Cause
This, there are many optional signal structures for additional damping controller.
For example, correspond to additional damping controller different input signal and on-position, such as Fig. 5 can be used more
The different control signal structure of kind, is totally summarized as following matrix form：
Wherein, yfiIndicate the input signal of additional longitudinal forces ring, it can be a letter to correspond to different control strategies
Number (i=1), can also be multiple signals (i=1,2...m)；ufjIt indicates the on-position of additional longitudinal forces ring, can be one
A signal (j=1) can also be multiple signals (j=1,2...n)；GijIndicate the transmission function of additional longitudinal forces ring, respectively
Corresponding to different input signals and on-position, i=1,2...m, j=1,2...n.
For example, can preferentially be chosen according to residue theory and root locus method the input signal of the additional damping controller with
And on-position, typical input signal and corresponding on-position are as follows：Typical preferred input signal：Series capacitor both ends
Voltage Vc, stator current d axis components i1d, q axis components i1qAs input signal；Typical preferred on-position：D1, E1 of GSC,
A2, B2, C2 of F1, RSC.It can also be directed to real system, corresponding input signal is preferentially chosen using other similar methods
And on-position, it is not limited to above-mentioned typical priority signal and position.Additional damping control is added in current transformer control strategy
System generates the additional control amount for playing positive damping to subsynchronous resonance, can effectively inhibit subsynchronous resonance, while will not subtract
Mini system can guarantee the stable operation of other patterns of system to the damping action of other operational modes.
The control method of the inhibition subsynchronous resonance of the embodiment of the present invention selects the input letter of additional damping controller first
Number, then determine the on-position of additional damping controller, and input signal is filtered, ratio phase shift and amplitude limit obtain it is defeated
Go out and control signal, finally according to output control signal and the on-position suppression system subsynchronous resonance.This method effectively presses down
The subsynchronous resonance of system processed ensure that wind turbine and the safe and stable operation of system.
Corresponding with the inhibition control method of subsynchronous resonance that above-described embodiment provides, a kind of embodiment of the invention is also
A kind of control device inhibiting subsynchronous resonance is provided, due to the control dress provided in an embodiment of the present invention for inhibiting subsynchronous resonance
The control method for setting the inhibition subsynchronous resonance provided with above-described embodiment has same or analogous technical characteristic, therefore preceding
It states and the embodiment of the control method of subsynchronous resonance is inhibited to be also applied for the control provided in this embodiment for inhibiting subsynchronous resonance
Device processed, is not described in detail in the present embodiment.As shown in fig. 6, the control device of the inhibition subsynchronous resonance may include：Choosing
Select module 10, determining module 20, processing module 30 and suppression module 40.
Wherein, selecting module 10 is used to select the input signal of additional damping controller.
Determining module 20 is used to determine the on-position of additional damping controller.
Processing module 30 is used to be filtered input signal, ratio phase shift and amplitude limit obtain output control signal.
Suppression module 40 is used for according to output control signal and on-position suppression system subsynchronous resonance.
In some instances, selecting module 10 is specifically used for：The input of the additional damping controller of rotor-side converter is believed
Number include：Rotor current d axis components i1d, q axis components i1q, stator current d axis components i2d, q axis components i2q, rotor speed ω1r、
The reactive power Q of stator side current transformer output1s, fan stator side output active-power P1LWith series capacitor both end voltage
V1CIn single input signal or multiple input signal combination；The input signal packet of the additional damping controller of grid side converter
It includes：Rotor current d axis components i3d, q axis components i3q, stator current d axis components i4d, q axis components i4q, rotor speed ω2r, direct current
Busbar voltage Vdc, generator set end voltage Vs, fan stator side output active-power P2LWith series capacitor both end voltage
V2CIn single input signal or multiple input signal combination.
In some instances, processing module 30 is specifically used for：Bandpass filter either high-pass filter or bandpass filtering
Device and high-pass filter tandem compound are filtered input signal.Pass through phase shifter either proportional component or phase shifter and ratio
Example link tandem compound carries out amplitude proportion adjusting to filtered input signal and phase delay compensates.Phase delay is compensated
Input signal afterwards carries out amplitude limit and obtains output control signal.
In some instances, the on-position of additional damping controller is according to the input signal for selecting additional damping controller
It determines.Additional damping controller has sole access to the different location of rotor-side converter or grid side converter.
In some instances, the transmission function of bandpass filter is：Wherein, ωc1
For subsynchronous resonance frequency；ξ1For damping ratio.The transmission function of high-pass filter is：Wherein, ξ2
For damped coefficient.Phase delay compensation transmission function be：Wherein, g indicates proportionality coefficient；T is indicated
Time constant, m take integer of 1 to 3.Amplitude limit formula is：Wherein, XinIndicate amplitude limit
The additional control signals of link input, XoutIndicate that the reality output of amplitude limit link controls signal, Xmax、XminIt indicates respectively additional
Acceptable maximum, the minimum output control signal value of damping controller, i.e. Xmax、XminRespectively indicate preset range upper limit value and
Lower limiting value.
The control device of the inhibition subsynchronous resonance of the embodiment of the present invention selects the input letter of additional damping controller first
Number, then determine the on-position of additional damping controller, and input signal is filtered, ratio phase shift and amplitude limit obtain it is defeated
Go out and control signal, finally according to output control signal and the on-position suppression system subsynchronous resonance.The device effectively presses down
The subsynchronous resonance of system processed ensure that wind turbine and the safe and stable operation of system.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indicating or implies relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, include according to involved function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (6)
1. a kind of control method inhibiting subsynchronous resonance, which is characterized in that include the following steps：
Select the input signal of additional damping controller, the input signal：Include the additional longitudinal forces of rotor-side converter
The input signal of device includes：Rotor current d axis components i1d, q axis components i1q, stator current d axis components i2d, q axis components i2q, turn
Rotor speed ω1r, stator side current transformer output reactive power Q1s, fan stator side output active-power P1LAnd series capacitance
Device both end voltage V1CIn single input signal or the combination of multiple input signal and the additional damping controller of grid side converter
Input signal include：Rotor current d axis components i3d, q axis components i3q, stator current d axis components i4d, q axis components i4q, rotor
Rotational speed omega2r, DC bus-bar voltage Vdc, generator set end voltage Vs, fan stator side output active-power P2LAnd series electrical
Container both end voltage V2CIn single input signal or multiple input signal combination；
Determine the on-position of the additional damping controller；
The input signal is filtered, ratio phase shift and amplitude limit obtain output control signal, control signal is especially by band
Either high-pass filter or the bandpass filter and the high-pass filter tandem compound believe the input to bandpass filter
Number be filtered, by phase shifter either proportional component or the phase shifter and the proportional component tandem compound to the filter
Input signal after wave carries out amplitude proportion adjusting and phase delay compensation, is adjusted to the amplitude proportion and phase delay compensates
Input signal afterwards carries out amplitude limit and obtains output control signal；
Signal and the on-position suppression system subsynchronous resonance are controlled according to the output.
2. control method as described in claim 1, which is characterized in that the on-position of the additional damping controller is according to choosing
The input signal for selecting additional damping controller determines；The additional damping controller individually/while being linked into rotor-side converter
Or/and the different location of grid side converter.
3. control method as described in claim 1, which is characterized in that the transmission function of the bandpass filter is：Wherein, ωc1For subsynchronous resonance frequency；ξ1For damping ratio, the high-pass filter
Transmission function is：Wherein, ξ2For damped coefficient, G0For gain, ωnIt is characterized frequency；
The amplitude proportion is adjusted and the transmission function of phase delay compensation is：Wherein, g indicates ratio
Example coefficient；T indicates that time constant, m take integer of 1 to 3；
The amplitude limit formula is：Wherein, XinIndicate the additional control of amplitude limit link input
Signal processed, XoutIndicate that the reality output of amplitude limit link controls signal, Xmax、XminIndicate that additional damping controller is acceptable respectively
Maximum, minimum output control signal value, i.e. Xmax、XminThe upper limit value and lower limiting value of preset range are indicated respectively.
4. a kind of control device inhibiting subsynchronous resonance, which is characterized in that including：
Selecting module, the input signal for selecting additional damping controller, the input signal：Including rotor-side converter
The input signal of additional damping controller include：Rotor current d axis components i1d, q axis components i1q, stator current d axis components
i2d, q axis components i2q, rotor speed ω1r, stator side current transformer output reactive power Q1s, fan stator side output wattful power
Rate P1LWith series capacitor both end voltage V1CIn single input signal or multiple input signal combination and grid side converter
The input signal of additional damping controller include：Rotor current d axis components i3d, q axis components i3q, stator current d axis components
i4d, q axis components i4q, rotor speed ω2r, DC bus-bar voltage Vdc, generator set end voltage Vs, fan stator side output
Active-power P2LWith series capacitor both end voltage V2CIn single input signal or multiple input signal combination；
Determining module, the on-position for determining the additional damping controller；
Processing module, for being filtered to the input signal, ratio phase shift and amplitude limit obtain output control signal, control letter
Number especially by bandpass filter either high-pass filter or the bandpass filter and the high-pass filter tandem compound
The input signal is filtered, by phase shifter, either proportional component or the phase shifter and the proportional component are connected
Combination carries out amplitude proportion adjusting to the filtered input signal and phase delay compensates, the amplitude proportion is adjusted and
Input signal after phase delay compensation carries out amplitude limit and obtains output control signal；
Suppression module, for controlling signal and the on-position suppression system subsynchronous resonance according to the output.
5. control device as claimed in claim 4, which is characterized in that the on-position of the additional damping controller is according to choosing
The input signal for selecting additional damping controller determines；The additional damping controller individually/while being linked into rotor-side converter
Or/and the different location of grid side converter.
6. control device as claimed in claim 4, which is characterized in that the transmission function of the bandpass filter is：Wherein, ωc1For subsynchronous resonance frequency；ξ1For damping ratio, the high-pass filter
Transmission function is：Wherein, ξ2For damped coefficient, G0For gain, ωnIt is characterized frequency；
The amplitude proportion is adjusted and the transmission function of phase delay compensation is：Wherein, g indicates ratio
Example coefficient；T indicates that time constant, m take integer of 1 to 3；
The amplitude limit formula is：Wherein, XinIndicate the additional control of amplitude limit link input
Signal processed, XoutIndicate that the reality output of amplitude limit link controls signal, Xmax、XminIndicate that additional damping controller is acceptable respectively
Maximum, minimum output control signal value, i.e. Xmax、XminThe upper limit value and lower limiting value of preset range are indicated respectively.
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| CN109546663B (en) * | 2017-09-21 | 2021-12-10 | 南京南瑞继保电气有限公司 | Method for adjusting damping control signal of subsynchronous oscillation suppression system |
| CN108233363A (en) * | 2017-12-28 | 2018-06-29 | 中国电力科学研究院有限公司 | A kind of subsynchronous resonance suppressing method and device based on THE UPFC |
| CN109995052B (en) | 2017-12-29 | 2021-06-11 | 北京金风科创风电设备有限公司 | Subsynchronous suppression method and device and controller of converter |
| CN108321820B (en) * | 2018-02-05 | 2020-03-17 | 国家电网公司华北分部 | Electric power system oscillation control amplitude limiter and system |
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| ES2928448T3 (en) * | 2018-12-19 | 2022-11-17 | Siemens Gamesa Renewable Energy Innovation & Technology SL | Method and system for damping oscillations and subsynchronous interactions |
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