CN105790288A - Control method and device of restraining sub-synchronous resonance - Google Patents
Control method and device of restraining sub-synchronous resonance Download PDFInfo
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- CN105790288A CN105790288A CN201610265094.4A CN201610265094A CN105790288A CN 105790288 A CN105790288 A CN 105790288A CN 201610265094 A CN201610265094 A CN 201610265094A CN 105790288 A CN105790288 A CN 105790288A
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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
Abstract
The present invention discloses a control method and device of restraining sub-synchronous resonance, wherein the method comprises the steps of selecting an input signal of an additional damping controller; determining the access position of the additional damping controller; carrying out the filtering, proportional phase shift and amplitude limiting operations on the input signal to obtain an output control signal; restraining the sub-synchronous resonance of a system according to the output control signal and the access position. According to the method of the present invention, the sub-synchronous resonance of the system is restrained effectively, and the safe and stable operation of a draught fan and the system is guaranteed. The present invention also provides a control device of restraining the sub-synchronous resonance.
Description
Technical field
The present invention relates to technical field of electric power system control, particularly relate to a kind of control method suppressing subsynchronous resonance and device.
Background technology
In recent years, China's wind-power electricity generation sustained and rapid development, the scale of wind energy turbine set also constantly expands.Double-fed wind power generator group with its flexibly control characteristic be widely used in wind generator system.Double-fed wind power generator (DFIG-Doubly-fedInductionGenerator) adopts two voltage source converters back-to-back, connected by DC link to carry out AC excitation.Wherein, the changer being connected with DFIG rotor is called rotor-side changer (RSC-RotorSideConvertor), and the control of RSC can be realized meritorious, the Reactive Power Control to the output of DFIG stator；The changer being connected with DFIG stator is called grid side converter (GSC-GridSideConvertor), can realize keeping DC bus-bar voltage to stablize, ensureing input current sine and control input power factor to the control of GSC.
Studies have shown that, when double-fed wind power generator group outwards carries wind-powered electricity generation by series capacitor compensated line, it is likely to cause serious Sub-synchronous Resonance (SSR-SubsynchronousResonance), compared to other kinds of generating set, the wind energy turbine set compensated transmission system taking unit with double-fed wind power generator group as the leading factor is easier to cause SSR risk.And, the SSR problem that double-fed fan motor field occurs mainly is caused by the interaction between dual-feedback wind power generator control system and fixed series compensation, its characteristic is extremely complex, SSR characteristic all can be produced impact by wind speed, equivalence series compensation degrees, board number and the convertor controls parameter of generating electricity by way of merging two or more grid systems, and therefore how effectively to suppress double-fed fan motor field SSR problem but without good solution.
Summary of the invention
The purpose of the present invention is intended to solve at least to a certain extent one of above-mentioned technical problem.
For this, first purpose of the present invention is in that to propose a kind of control method suppressing subsynchronous resonance.The method effectively suppresses the subsynchronous resonance of system, it is ensured that the safe and stable operation of blower fan and system.
Second purpose of the present invention is in that to propose a kind of control device suppressing subsynchronous resonance.
For reaching above-mentioned purpose, the control method suppressing subsynchronous resonance of first aspect present invention embodiment, including: select the input signal of additional damping controller；Determine the on-position of described additional damping controller；Described input signal is filtered, ratio phase shift and amplitude limit obtain output control signal；System subsynchronous resonance is suppressed according to described output control signal and described on-position.
The control method suppressing subsynchronous resonance of the embodiment of the present invention, first the input signal of additional damping controller is selected, then the on-position of additional damping controller is determined, and input signal is filtered, ratio phase shift and amplitude limit obtain output control signal, suppress system subsynchronous resonance finally according to output control signal and described on-position.The method effectively suppresses the subsynchronous resonance of system, it is ensured that the safe and stable operation of blower fan and system.
In some instances, the input signal of described selection additional damping controller specifically includes:
The input signal of the additional damping controller of rotor-side changer includes: rotor current d axle component i1d, q axle component i1q, stator current d axle component i2d, q axle component i2q, rotor speed ω1r, stator side current transformer output reactive power Q1s, fan stator side output active-power P1LWith series capacitor both end voltage V1CIn single input signal or the combination of multiple input signal；The input signal of the additional damping controller of grid side converter includes: rotor current d axle component i3d, q axle component i3q, stator current d axle component i4d, q axle component i4q, rotor speed ω2r, DC bus-bar voltage Vdc, electromotor set end voltage Vs, fan stator side output active-power P2LWith series capacitor both end voltage V2CIn single input signal or the combination of multiple input signal.
In some instances, described described input signal is filtered, ratio phase shift and amplitude limit obtain output control signal and specifically include: by band filter or high pass filter or described band filter and described high pass filter tandem compound, described input signal is filtered；By phase shifter or proportional component or described phase shifter and described proportional component tandem compound described filtered input signal carried out amplitude proportion adjustment and Phase delay compensates；Input signal after the adjustment of described amplitude proportion and Phase delay are compensated carries out amplitude limit and obtains output control signal.
In some instances, the on-position of described additional damping controller is determined according to the input signal selecting additional damping controller；Described additional damping controller individually/be concurrently accessed rotor-side changer or/and the diverse location of grid side converter.
In some instances, the transmission function of described band filter is:Wherein, ωc1For subsynchronous resonance frequency；ξ1For damping ratio, the transmission function of described high pass filter is:Wherein, ξ2For damped coefficient；The transmission function that described amplitude proportion regulates and Phase delay compensates is:Wherein, g represents proportionality coefficient；T express time constant, m takes the integer of 1 to 3；Described amplitude limit formula is:Wherein, XinRepresent the additional control signals of amplitude limit link input, XoutRepresent the actual output control signal of amplitude limit link, Xmax、XminRepresent the acceptable output control signal value maximum, minimum of additional damping controller, i.e. X respectivelymax、XminRepresent higher limit and the lower limit of preset range respectively.
For reaching above-mentioned purpose, the control device suppressing subsynchronous resonance of second aspect present invention embodiment, including: select module, for selecting the input signal of additional damping controller；Determine module, for determining the on-position of described additional damping controller；Processing module, for described input signal is filtered, ratio phase shift and amplitude limit obtain output control signal；Suppression module, for suppressing system subsynchronous resonance according to described output control signal and described on-position.
The control device suppressing subsynchronous resonance of the embodiment of the present invention, first the input signal of additional damping controller is selected, then the on-position of additional damping controller is determined, and input signal is filtered, ratio phase shift and amplitude limit obtain output control signal, suppress system subsynchronous resonance finally according to output control signal and described on-position.This device effectively suppresses the subsynchronous resonance of system, it is ensured that the safe and stable operation of blower fan and system.
In some instances, described selection module specifically for: the input signal of the additional damping controller of rotor-side changer includes: rotor current d axle component i1d, q axle component i1q, stator current d axle component i2d, q axle component i2q, rotor speed ω1r, stator side current transformer output reactive power Q1s, fan stator side output active-power P1LWith series capacitor both end voltage V1CIn the combination of single input signal or multiple input signal；The input signal of the additional damping controller of grid side converter includes: rotor current d axle component i3d, q axle component i3q, stator current d axle component i4d, q axle component i4q, rotor speed ω2r, DC bus-bar voltage Vdc, electromotor set end voltage Vs, fan stator side output active-power P2LWith series capacitor both end voltage V2CIn the combination of single input signal or multiple input signal.
In some instances, described processing module specifically for: by band filter or high pass filter or described band filter and described high pass filter tandem compound, described input signal is filtered；By phase shifter or proportional component or described phase shifter and described proportional component tandem compound described filtered input signal carried out amplitude proportion adjustment and Phase delay compensates；Input signal after the adjustment of described amplitude proportion and Phase delay are compensated carries out amplitude limit and obtains output control signal.
In some instances, the on-position of described additional damping controller is determined according to the input signal selecting additional damping controller；Described additional damping controller individually/be concurrently accessed rotor-side changer or/and the diverse location of grid side converter.
In some instances, the transmission function of described band filter is:Wherein, ωc1For subsynchronous resonance frequency；ξ1For damping ratio, the transmission function of described high pass filter is:Wherein, ξ2For damped coefficient；The transmission function that described amplitude proportion regulates and Phase delay compensates is:Wherein, g represents proportionality coefficient；T express time constant, m takes the integer of 1 to 3；Described amplitude limit formula is:Wherein, XinRepresent the additional control signals of amplitude limit link input, XoutRepresent the actual output control signal of amplitude limit link, Xmax、XminRepresent the acceptable output control signal value maximum, minimum of additional damping controller, i.e. X respectivelymax、XminRepresent higher limit and the lower limit of preset range respectively.
Aspect and advantage that the present invention adds will part provide in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the overall structure schematic diagram of additional longitudinal forces system according to an embodiment of the invention；
Fig. 2 is the flow chart of the control method suppressing subsynchronous resonance according to an embodiment of the invention；
Fig. 3 (a) is that additional damping controller accesses the position view of GSC according to an embodiment of the invention；
Fig. 3 (b) is that additional damping controller accesses the position view of 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 representation of the controller suppressing subsynchronous resonance according to an embodiment of the invention.
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
By in double-fed fan stator side or/and on rotor-side changer supplementary subsynchronous damping control device or in the control strategy of current transformer introduce additional longitudinal forces link, and then the additional controlled quentity controlled variable that subsynchronous resonance is played positive damping effect is introduced at double-fed blower interior, can effectively suppress the subsynchronous resonance of system, it is ensured that the safe and stable operation of blower fan and system.
First the overall structure schematic diagram of additional longitudinal forces system is understood in conjunction with Fig. 1.
Additional damping controller can access GSC or/and RSC controls system.In implementation, additional damping controller can adopt additional hardware DeviceMode, namely adopts independent control device and is controlled output signal access GSC or/and RSC control system realizes；May be used without embedded software mode, namely hardware is not additionally set, only need at double-fed blower fan GSC or/and the control software design (code) that RSC controls internal system increase corresponding realizes.
The basic functional principle of additional longitudinal forces is, by reasonably selecting the input signal of additional damping controller, after filtering, ratio/link such as phase shift, amplitude limit, the additional controlled quentity controlled variable that subsynchronous resonance is played positive damping effect is introduced at double-fed blower interior, make to provide positive electrical damping to system under the oscillation mode of subsynchronous frequency, thus reaching effectively to suppress the purpose of system subsynchronous resonance.Therefore, additional damping controller introduces the additional controlled quentity controlled variable that subsynchronous resonance plays positive damping effect, can effectively suppress system subsynchronous resonance.
Fig. 2 is the flow chart of the control method suppressing subsynchronous resonance according to an embodiment of the invention.
As in figure 2 it is shown, the control method of this suppression subsynchronous resonance may include that
S101, selects the input signal of additional damping controller.
Firstly the need of the input signal selecting additional damping controller, it is possible to select single input signal or the combination of multiple input signal.Illustrate with the input signal of the input signal of the additional damping controller of rotor-side changer and the additional damping controller of grid side converter below.
Specifically, in some instances, the input signal of the additional damping controller of rotor-side changer includes: rotor current d axle component i1d, q axle component i1q, stator current d axle component i2d, q axle component i2q, rotor speed ω1r, stator side current transformer output reactive power Q1s, fan stator side output active-power P1LWith series capacitor both end voltage V1CIn one or more combination；
Specifically, in some instances, the input signal of the additional damping controller of grid side converter includes: rotor current d axle component i3d, q axle component i3q, stator current d axle component i4d, q axle component i4q, rotor speed ω2r, DC bus-bar voltage Vdc, electromotor set end voltage Vs, fan stator side output active-power P2LWith series capacitor both end voltage V2CIn one or more combination.
It should be noted that can according to control strategies different in real system, the single or multiple variable of corresponding selection is as the input signal of additional damping controller.Can also by other signal acquiring systems, a large amount of feedback signals collected in WAMS are as the input signal of additional damping controller, but need to consider the time delay of signal acquiring system.
S102, it is determined that the on-position of additional damping controller.
First, the inhibitory action of subsynchronous resonance is closely related with additional damping controller on-position, the on-position selecting suitable additional damping controller can be provided about more positive damping in resonant frequency, can effectively suppress the subsynchronous resonance of system, therefore in conjunction with the control strategy of stator current transformer and rotor current transformer, it is necessary to reasonably select the on-position of additional damping controller.
Wherein, the on-position of additional damping controller is determined according to the input signal selecting additional damping controller；Additional damping controller has sole access to the diverse location of rotor-side changer or grid side converter.
It should be noted that the selection of additional damping controller on-position needs to meet following principle: be provided about enough positive dampings in resonant frequency, can effectively suppress the subsynchronous resonance of system；The not influential system damping action to other operational modes, it is ensured that 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), shown in accompanying drawing 3 (a) and 3 (b), accompanying drawing 3 (a) accesses GSC for additional longitudinal forces and controls the position view of system, and accompanying drawing 3 (b) accesses RSC for additional longitudinal forces and controls the position view of system.Input signal according to the above-mentioned different additional damping controller chosen in the present invention, corresponding can choose the on-position of additional damping controller.Additional damping controller can have sole access to the different local of RSC or GSC controller, and as shown in Figure 3, GSC control loop interior location has 6, is A1-position, position F1 respectively；RSC control loop interior location has 6, is A2-position, position F2 respectively, and these points all can as the on-position of additional longitudinal forces.
S103, is filtered input signal, ratio phase shift and amplitude limit obtain output control signal.
Specifically, by band filter or high pass filter or band filter and high pass filter tandem compound, input signal is filtered；By phase shifter or proportional component or phase shifter and proportional component tandem compound filtered input signal carried out amplitude proportion adjustment and Phase delay compensates；Input signal after Phase delay is compensated carries out amplitude limit and obtains output control signal.
The transmission function of band filter is:Wherein, ωc1For subsynchronous resonance frequency；ξ1For damping ratio.The transmission function of high pass filter is:Wherein, ξ2For damped coefficient.The transmission function that Phase delay compensates is:Wherein, g represents proportionality coefficient；T express time constant, m takes the integer of 1 to 3.Amplitude limit formula is:Wherein, XinRepresent the additional control signals of amplitude limit link input, XoutRepresent the actual output control signal of amplitude limit link, Xmax、XminRepresent the acceptable output control signal value maximum, minimum of additional damping controller, i.e. X respectivelymax、XminRepresent higher limit and the lower limit of preset range respectively.
Describe in detail in conjunction with Fig. 4 and signal filtering is first carried out.The purpose of this link is to filter non-subsynchronous frequency component from the input signal chosen, filter out required subsynchronous frequency component, improve additional longitudinal forces damping under subsynchronous resonance frequency, impact when simultaneously reducing additional damping controller to stable operation as far as possible, can adopt the tandem compound of band filter or high pass filter or band filter and high pass filter to realize.:
It should be noted that band filter, it is therefore an objective to filter out the subsynchronous frequency component paid close attention to, improve additional longitudinal forces damping under subsynchronous resonance frequency, it is achieved method is various simultaneously.
It should be noted that, high pass filter, purpose is the interference (such as the DC component that abc three-phase power frequency signal is converted into after dq decomposes) of filtered signal medium and low frequency composition, leach required high frequency time synchronous resonant frequency, reduce transmission function amplitude gain under non-subsynchronous resonance frequency in additional damping controller, it is achieved various informative as far as possible.It should be noted that the phase shifter, it is therefore an objective to the Phase delay of wave filter is compensated, and sets necessary phase offset according to control strategy, it is achieved method is various, such as the high-pass/low-pass filtering type phase shifter.
It should be noted that proportional component, it is therefore an objective to required signal is carried out suitable amplitude compensation.
It should be noted that the purpose of amplitude limit is the output control signal to additional damping controller carries out amplitude limiting processing, so that the output control signal amplitude of additional damping controller is positioned at set point.Specifically, amplitude limit link mainly limits the amplitude of the output control signal of additional damping controller, in order to avoid overshoot, it is thus desirable to the output control signal after phase shift is carried out amplitude limiting processing, its objective is to be limited in certain scope by the output control signal of additional damping controller, when exporting the control signal higher limit higher than preset range or the lower limit lower than preset range, actual output control signal will be restricted to a certain steady state value, and do not change with the change of input signal, wherein, this steady state value is positioned at preset range.
S104, suppresses system subsynchronous resonance according to output control signal and described on-position.
In all selectable input signals, it is possible to only select one of them as input signal, it is also possible to the ruuning situation according to real system, select multiple different variable as input signal；Consider multiple different on-position simultaneously.Therefore, additional damping controller has the signal structure of plurality of optional.
For example, the input signal different corresponding to additional damping controller and on-position, such as Fig. 5, multiple different control signal structure can be adopted, be totally summarized as following matrix form:
Wherein, yfiRepresent the input signal of additional longitudinal forces ring, can be a signal (i=1) corresponding to different control strategies, it is also possible to be multiple signal (i=1,2...m)；ufjRepresent the on-position of additional longitudinal forces ring, it is possible to be a signal (j=1), it is also possible to be multiple signal (j=1,2...n)；GijRepresent the transmission function of additional longitudinal forces ring, correspond respectively to different input signals and on-position, i=1,2...m, j=1,2...n.
Such as, can preferentially choosing input signal and the on-position of this additional damping controller according to residue theory and root locus method, typical input signal and corresponding on-position are as follows: typical case preferably inputs signal: series capacitor both end voltage Vc, stator current d axle component i1d, q axle component i1qAs input signal；D1, E1, F1 of typical case preferably on-position: GSC, A2, B2, C2 of RSC.For real system, other similar methods can also be adopted preferentially to choose corresponding input signal and on-position, are not limited to above-mentioned typical case's priority signal and position.Current transformer control strategy adds additional longitudinal forces, produce subsynchronous resonance is played the additional controlled quentity controlled variable of positive damping effect, can effectively suppress subsynchronous resonance, simultaneously without reducing the system damping action to other operational modes, it is ensured that the stable operation of other patterns of system.
The control method suppressing subsynchronous resonance of the embodiment of the present invention, first the input signal of additional damping controller is selected, then the on-position of additional damping controller is determined, and input signal is filtered, ratio phase shift and amplitude limit obtain output control signal, suppress system subsynchronous resonance finally according to output control signal and described on-position.The method effectively suppresses the subsynchronous resonance of system, it is ensured that the safe and stable operation of blower fan and system.
The control method of the suppression subsynchronous resonance provided with above-described embodiment is corresponding, a kind of embodiment of the present invention also provides for a kind of control device suppressing subsynchronous resonance, the control method suppressing subsynchronous resonance controlling device and above-described embodiment offer suppressing subsynchronous resonance provided due to the embodiment of the present invention has same or analogous technical characteristic, therefore it is also applied for, at the embodiment of the control method of aforementioned suppression subsynchronous resonance, the control device suppressing subsynchronous resonance that the present embodiment provides, is not described in detail in the present embodiment.As shown in Figure 6, the control device of this suppression subsynchronous resonance comprises the steps that selection module 10, determines module 20, processing module 30 and suppression module 40.
Wherein, select module 10 for selecting the input signal of additional damping controller.
Determine that module 20 is for determining the on-position of additional damping controller.
Processing module 30 for input signal is filtered, ratio phase shift and amplitude limit obtain output control signal.
Suppression module 40 is for suppressing system subsynchronous resonance according to output control signal and on-position.
In some instances, select module 10 specifically for: the input signal of the additional damping controller of rotor-side changer includes: rotor current d axle component i1d, q axle component i1q, stator current d axle component i2d, q axle component i2q, rotor speed ω1r, stator side current transformer output reactive power Q1s, fan stator side output active-power P1LWith series capacitor both end voltage V1CIn the combination of single input signal or multiple input signal；The input signal of the additional damping controller of grid side converter includes: rotor current d axle component i3d, q axle component i3q, stator current d axle component i4d, q axle component i4q, rotor speed ω2r, DC bus-bar voltage Vdc, electromotor set end voltage Vs, fan stator side output active-power P2LWith series capacitor both end voltage V2CIn the combination of single input signal or multiple input signal.
In some instances, input signal is filtered by processing module 30 specifically for: band filter or high pass filter or band filter and high pass filter tandem compound.By phase shifter or proportional component or phase shifter and proportional component tandem compound filtered input signal carried out amplitude proportion adjustment and Phase delay compensates.Input signal after Phase delay is compensated carries out amplitude limit and obtains output control signal.
In some instances, the on-position of additional damping controller is determined according to the input signal selecting additional damping controller.Additional damping controller has sole access to the diverse location of rotor-side changer or grid side converter.
In some instances, the transmission function of band filter is:Wherein, ωc1For subsynchronous resonance frequency；ξ1For damping ratio.The transmission function of high pass filter is:Wherein, ξ2For damped coefficient.The transmission function that Phase delay compensates is:Wherein, g represents proportionality coefficient；T express time constant, m takes the integer of 1 to 3.Amplitude limit formula is:Wherein, XinRepresent the additional control signals of amplitude limit link input, XoutRepresent the actual output control signal of amplitude limit link, Xmax、XminRepresent the acceptable output control signal value maximum, minimum of additional damping controller, i.e. X respectivelymax、XminRepresent higher limit and the lower limit of preset range respectively.
The control device suppressing subsynchronous resonance of the embodiment of the present invention, first the input signal of additional damping controller is selected, then the on-position of additional damping controller is determined, and input signal is filtered, ratio phase shift and amplitude limit obtain output control signal, suppress system subsynchronous resonance finally according to output control signal and described on-position.This device effectively suppresses the subsynchronous resonance of system, it is ensured that the safe and stable operation of blower fan and system.
In describing the invention, it is to be understood that term " first ", " second " only for descriptive purposes, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, for instance two, three etc., unless otherwise expressly limited specifically.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner.Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art.
Describe in flow chart or in this any process described otherwise above or method and be construed as, represent and include the module of code of executable instruction of one or more step for realizing specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press order that is shown or that discuss, including according to involved function by basic mode simultaneously or in the opposite order, performing function, this should be understood by embodiments of the invention person of ordinary skill in the field.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (10)
1. the control method suppressing subsynchronous resonance, it is characterised in that comprise the following steps:
Select the input signal of additional damping controller；
Determine the on-position of described additional damping controller；
Described input signal is filtered, ratio phase shift and amplitude limit obtain output control signal；
System subsynchronous resonance is suppressed according to described output control signal and described on-position.
2. control method as claimed in claim 1, it is characterised in that the input signal of described selection additional damping controller specifically includes:
The input signal of the additional damping controller of rotor-side changer includes: rotor current d axle component i1d, q axle component i1q, stator current d axle component i2d, q axle component i2q, rotor speed ω1r, stator side current transformer output reactive power Q1s, fan stator side output active-power P1LWith series capacitor both end voltage V1CIn single input signal or the combination of multiple input signal；
The input signal of the additional damping controller of grid side converter includes: rotor current d axle component i3d, q axle component i3q, stator current d axle component i4d, q axle component i4q, rotor speed ω2r, DC bus-bar voltage Vdc, electromotor set end voltage Vs, fan stator side output active-power P2LWith series capacitor both end voltage V2CIn single input signal or the combination of multiple input signal.
3. control method as claimed in claim 1, it is characterised in that described described input signal is filtered, ratio phase shift and amplitude limit obtain output control signal and specifically include:
By band filter or high pass filter or described band filter and described high pass filter tandem compound, described input signal is filtered；
By phase shifter or proportional component or described phase shifter and described proportional component tandem compound described filtered input signal carried out amplitude proportion adjustment and Phase delay compensates；
Input signal after the adjustment of described amplitude proportion and Phase delay are compensated carries out amplitude limit and obtains output control signal.
4. control method as claimed in claim 1, it is characterised in that the on-position of described additional damping controller is determined according to the input signal selecting additional damping controller；Described additional damping controller individually/be concurrently accessed rotor-side changer or/and the diverse location of grid side converter.
5. control method as claimed in claim 3, it is characterised in that the transmission function of described band filter is:Wherein, ωc1For subsynchronous resonance frequency；ξ1For damping ratio, the transmission function of described high pass filter is:Wherein, ξ2For damped coefficient；
The transmission function that described amplitude proportion regulates and Phase delay compensates is:Wherein, g represents proportionality coefficient；T express time constant, m takes the integer of 1 to 3；
Described amplitude limit formula is:Wherein, XinRepresent the additional control signals of amplitude limit link input, XoutRepresent the actual output control signal of amplitude limit link, Xmax、XminRepresent the acceptable output control signal value maximum, minimum of additional damping controller, i.e. X respectivelymax、XminRepresent higher limit and the lower limit of preset range respectively.
6. the control device suppressing subsynchronous resonance, it is characterised in that including:
Select module, for selecting the input signal of additional damping controller；
Determine module, for determining the on-position of described additional damping controller；
Processing module, for described input signal is filtered, ratio phase shift and amplitude limit obtain output control signal；
Suppression module, for suppressing system subsynchronous resonance according to described output control signal and described on-position.
7. control device as claimed in claim 6, it is characterised in that described selection module specifically for:
The input signal of the additional damping controller of rotor-side changer includes: rotor current d axle component i1d, q axle component i1q, stator current d axle component i2d, q axle component i2q, rotor speed ω1r, stator side current transformer output reactive power Q1s, fan stator side output active-power P1LWith series capacitor both end voltage V1CIn the combination of single input signal or multiple input signal；
The input signal of the additional damping controller of grid side converter includes: rotor current d axle component i3d, q axle component i3q, stator current d axle component i4d, q axle component i4q, rotor speed ω2r, DC bus-bar voltage Vdc, electromotor set end voltage Vs, fan stator side output active-power P2LWith series capacitor both end voltage V2CIn single input signal or the combination of multiple input signal.
8. control device as claimed in claim 6, it is characterised in that described processing module specifically for:
By band filter or high pass filter or described band filter and described high pass filter tandem compound, described input signal is filtered；
By phase shifter or proportional component or described phase shifter and described proportional component tandem compound described filtered input signal carried out amplitude proportion adjustment and Phase delay compensates；
Input signal after the adjustment of described amplitude proportion and Phase delay are compensated carries out amplitude limit and obtains output control signal.
9. control device as claimed in claim 6, it is characterised in that the on-position of described additional damping controller is determined according to the input signal selecting additional damping controller；Described additional damping controller individually/be concurrently accessed rotor-side changer or/and the diverse location of grid side converter.
10. control device as claimed in claim 8, it is characterised in that the transmission function of described band filter is:Wherein, ωc1For subsynchronous resonance frequency；ξ1For damping ratio, the transmission function of described high pass filter is:Wherein, ξ2For damped coefficient；
The transmission function that described amplitude proportion regulates and Phase delay compensates is:Wherein, g represents proportionality coefficient；T express time constant, m takes the integer of 1 to 3；
Described amplitude limit formula is:Wherein, XinRepresent the additional control signals of amplitude limit link input, XoutRepresent the actual output control signal of amplitude limit link, Xmax、XminRepresent the acceptable output control signal value maximum, minimum of additional damping controller, i.e. X respectivelymax、XminRepresent higher limit and the lower limit of preset range respectively.
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| CN201610265094.4A CN105790288B (en) | 2016-04-26 | 2016-04-26 | Inhibit the control method and device of subsynchronous resonance |
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| CN108565888A (en) * | 2018-02-06 | 2018-09-21 | 武汉理工大学 | A kind of stabilizer for inhibiting wind generator system DC voltage to vibrate |
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| CN108565888A (en) * | 2018-02-06 | 2018-09-21 | 武汉理工大学 | A kind of stabilizer for inhibiting wind generator system DC voltage to vibrate |
| CN108199394B (en) * | 2018-02-23 | 2019-09-24 | 华北电力科学研究院有限责任公司 | The sub-synchronous oscillation suppression method and device of Wind turbines |
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| CN108631337A (en) * | 2018-05-23 | 2018-10-09 | 哈尔滨工业大学 | The double-fed fan motor unit subsynchronous resonance suppressing method of damping control is cooperateed with based on converter |
| CN108631337B (en) * | 2018-05-23 | 2021-03-09 | 哈尔滨工业大学 | Converter cooperative damping control-based doubly-fed wind turbine generator subsynchronous resonance suppression method |
| CN113169692A (en) * | 2018-12-19 | 2021-07-23 | 西门子歌美飒可再生能源创新与技术有限公司 | Method and system for subsynchronous oscillation and interaction damping |
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