WO2023108923A1 - 电压源型风力发电机组的控制方法和控制装置 - Google Patents

电压源型风力发电机组的控制方法和控制装置 Download PDF

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Publication number
WO2023108923A1
WO2023108923A1 PCT/CN2022/080145 CN2022080145W WO2023108923A1 WO 2023108923 A1 WO2023108923 A1 WO 2023108923A1 CN 2022080145 W CN2022080145 W CN 2022080145W WO 2023108923 A1 WO2023108923 A1 WO 2023108923A1
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Prior art keywords
voltage
grid
axis component
component
voltage source
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PCT/CN2022/080145
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English (en)
French (fr)
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郭锐
阮景锋
刘闯
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新疆金风科技股份有限公司
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Publication of WO2023108923A1 publication Critical patent/WO2023108923A1/zh

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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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • 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
    • 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
    • H02J3/241—The oscillation concerning frequency
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

Definitions

  • the present disclosure relates to the field of wind power generation, and more specifically, to a control method and a control device for a voltage source type wind power generating set.
  • a wind turbine is a device that converts wind energy into electrical energy.
  • direct-drive/semi-direct-drive voltage source wind turbines are connected to the grid using full power converters.
  • Full power converters can be divided into machine-side converters and grid-side converters.
  • the machine-side converters convert the AC power output by the wind turbine into DC power, while the grid-side converters convert DC power into AC power so as to net.
  • Grid-following mode uses phase-locking technology to track grid voltage phase by collecting grid voltage, controls active power by injecting active current with the same phase as grid voltage, and performs reactive power control by injecting reactive current with a phase difference of 90 degrees from grid voltage .
  • the grid-construction mode is the same as the synchronous generator grid-connected technology. By simulating the rotor motion equation of the synchronous generator, it is synchronized with the grid according to the acceleration and deceleration of the rotor.
  • Grid-type converters are scattered in wind farms, and the wiring impedance in the field is complex. This requires grid-type converters to have certain adaptability to grid impedance and adaptability to a wide range of grid impedance parameters. , which can adapt to the operation requirements of both weak and strong power grids.
  • the grid voltage feed-forward makes the control of the virtual impedance of the grid-type converter simple, and is widely used in the control of the grid-type converter.
  • the voltage feedforward control will introduce an additional positive feedback loop, which will greatly reduce the stability margin of the voltage source wind turbine and reduce the robust stability of the voltage source wind turbine to the grid impedance.
  • the voltage outer loop control of grid-connected converters is usually implemented in the following way, that is, the grid-connected reference voltage minus the grid-connected voltage is divided by the virtual impedance to obtain the filter inductor current Reference.
  • the actual grid-connected voltage also has various harmonic components in addition to the fundamental component.
  • the above-mentioned external voltage control introduces the fundamental component and the harmonic component into the control together, and does not have the control of the fundamental component and the harmonic component. capacity, which will affect the control of the grid-side converter, resulting in reduced robustness to grid impedance.
  • Embodiments of the present disclosure provide a control method and a control device for a voltage source type wind power generating set, which can achieve the purpose of optimizing the impedance characteristics of the converter by flexibly adjusting the fundamental wave component and the harmonic component of the grid-connected voltage.
  • a control method of a voltage source wind turbine comprising: determining a virtual internal potential phase based on a DC bus voltage measurement value and a DC bus voltage reference value of a voltage source wind turbine ; Based on the fundamental component and harmonic component of the d-axis component of the grid-connected voltage in the dq coordinate system, determine the d-axis component of the adjusted grid-connected voltage, and based on the q-axis component of the grid-connected voltage in the dq coordinate system The fundamental wave component and the harmonic component determine the q-axis component of the adjusted grid-connected voltage; according to the adjusted d-axis component and q-axis component of the grid-connected voltage, the d-axis of the grid-connected reference voltage under the dq coordinate system component and q-axis component for voltage outer loop control or voltage outer loop control and current inner loop control to determine the d-axis component and q-axis component of the modulation voltage; according to the virtual internal potential phase and the d
  • a control device for a voltage source wind power generating set comprising: a virtual internal potential phase determination unit configured to be based on the measured value of the DC bus voltage of the voltage source wind power generating set and The DC bus voltage reference value determines the virtual internal potential phase;
  • the grid-connected voltage adjustment unit is configured to determine the adjusted grid-connected voltage based on the fundamental wave component and harmonic component of the d-axis component of the grid-connected voltage in the dq coordinate system d-axis component, and based on the fundamental wave component and harmonic component of the q-axis component of the grid-connected voltage in the dq coordinate system, determine the q-axis component of the adjusted grid-connected voltage;
  • the modulation voltage acquisition unit is configured to adjust according to The d-axis component and the q-axis component of the grid-connected voltage after the dq coordinate system are controlled by the d-axis component and the q-axis component of the grid-connected reference voltage, or the voltage outer loop control and the current inner
  • a computer-readable storage medium storing a computer program
  • the above-mentioned control method for a voltage source type wind power generating set is realized.
  • a computing device in another general aspect, includes: a processor; a memory storing a computer program, when the computer program is executed by the processor, the voltage source wind power generation as described above is realized The control method of the unit.
  • a voltage source wind turbine in another general aspect, includes the control device of the voltage source wind generator as described above, or the calculation device as described above.
  • the grid-side converter caused by directly using the grid-connected voltage feed-forward is solved
  • the problem of inflexible adjustment can optimize the impedance characteristics of the converter, improve the robustness and stability of the voltage source wind turbine to the grid impedance, and bring about the improvement of grid-side harmonics.
  • FIG. 1 is a flow chart illustrating a control method of a voltage source type wind power generating set according to an embodiment of the present disclosure
  • Fig. 2 is a schematic block diagram illustrating a control method of a voltage source type wind power generating set according to an embodiment of the present disclosure
  • FIG. 3 is a schematic block diagram of an example of adjusting fundamental and harmonic components of grid-connected voltage according to an embodiment of the present disclosure
  • Fig. 4 is a block diagram showing a control device of a voltage source type wind power generating set according to an embodiment of the present disclosure
  • FIG. 5 is a block diagram illustrating a computing device according to an embodiment of the present disclosure.
  • Fig. 6 is a diagram illustrating an example of an application effect of a control method of a voltage source type wind power generating set according to an embodiment of the present disclosure.
  • first means “first”, “second” and “third” may be used herein to describe various members, components, regions, layers or sections, these members, components, regions, layers or sections should not be referred to as These terms are limited. On the contrary, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section.
  • a first member, a first component, a first region, a first layer, or a first portion referred to in examples described herein could also be termed a second member, a second component, or a first portion without departing from the teachings of the examples.
  • Fig. 1 is a flowchart illustrating a control method of a voltage source type wind power generating set according to an embodiment of the present disclosure.
  • Fig. 2 is a schematic block diagram illustrating a control method of a voltage source type wind power generating set according to an embodiment of the present disclosure.
  • the control method of the voltage source wind power generating set according to the embodiment of the present disclosure may be executed by the main controller, the converter controller or other dedicated controllers of the voltage source wind power generating set.
  • step S101 the virtual internal potential phase ⁇ is determined based on the DC bus voltage measurement value u dc and the DC bus voltage reference value u dcref of the voltage source wind turbine.
  • the wind turbine torque demand value T demand * and the wind turbine Rotational speed (for example, angular velocity) ⁇ w the wind turbine torque demand value T demand * and the wind turbine Rotational speed (for example, angular velocity) ⁇ w , grid-connected voltage u dq in the dq coordinate system, and filter inductor current idq in the dq coordinate system to obtain the first active power deviation ⁇ P ref .
  • the virtual angular frequency deviation ⁇ can be determined based on the first active power deviation ⁇ P ref .
  • the virtual internal potential phase ⁇ can be determined based on the virtual angular frequency deviation ⁇ .
  • the deviation between the measured value of the DC bus voltage and the reference value of the DC bus voltage of the voltage source wind turbine can be the difference or the square difference between the measured value of the DC bus voltage and the reference value of the DC bus voltage, but this
  • the disclosure is not limited thereto, and other forms of deviations are also possible.
  • the square difference between the measured value of the DC bus voltage u dc and the reference value of the DC bus voltage u dcref that is, ) as an example, but the present disclosure is not limited thereto.
  • the DC bus power setting value P can be obtained by performing proportional integral (PI) calculation on the deviation between the DC bus voltage measurement value u dc and the DC bus voltage reference value u dcref of the voltage source wind turbine generator set DC .
  • the proportional operation link is expressed as K P_DC
  • the integral operation link is expressed as K i_dc /s, wherein K P_DC represents a proportional coefficient, and K i_dc represents an integral coefficient.
  • the power demand P w of the wind turbine can be obtained based on the torque demand value T demand * of the wind turbine and the rotational speed (eg, angular velocity) ⁇ w of the wind turbine, and can be based on the grid-connected voltage u dq in the dq coordinate system and the filter inductor current idq in the dq coordinate system to obtain the grid-side power P grd of the grid-side converter of the voltage source wind turbine.
  • the product of the torque demand value T demand * of the wind generator and the rotational speed ⁇ w of the wind generator can be calculated as the power demand P w of the wind generator.
  • the product of the d-axis component u d of the grid-connected voltage u dq in the dq coordinate system and the d-axis component i d of the grid-connected current i dq can be calculated, and the q-axis component u of the grid-connected voltage u dq in the dq coordinate system can be calculated.
  • the product of q and the q-axis component i q of the grid-connected current idq calculate the sum of the two products, and then multiply it by a predetermined coefficient to obtain the grid-side power P grd of the grid-side converter of the voltage source wind turbine.
  • the predetermined coefficient may be, for example, 3/2.
  • the first active power deviation ⁇ P ref can be determined based on the DC bus power setting value P DC , the power demand P w of the wind turbine and the grid-side power P grd of the grid-side converter of the voltage source wind turbine.
  • the DC bus power setting value P DC can be added to the power demand P w of the wind turbine, and then the grid-side power P grd of the grid-side converter of the voltage source wind turbine can be subtracted to obtain the first active power Power deviation ⁇ P ref .
  • the DC bus power setting value P DC can be added to the power demand P w of the wind turbine, and then the grid-side power P grd of the grid-side converter of the voltage source wind turbine can be subtracted to obtain the first active power Power deviation ⁇ P ref .
  • coordinate transformation for example, Clarke-Park transformation, ie, abc/dq transformation
  • coordinate transformation can be performed on the grid-side filter inductor current i abc , grid-connected voltage u abc and grid-connected current i gabc
  • a power limiting module may be provided after the proportional-integral calculation link, so as to limit the DC bus power setting value P DC obtained through the proportional-integral calculation link.
  • the virtual angular frequency deviation ⁇ may be determined through a virtual inertial damping link based on the first active power deviation ⁇ P ref .
  • the virtual inertial damping link can be expressed as 1/(sK J +K D ), where K J represents the virtual inertia coefficient, and K D represents the virtual damping coefficient.
  • the virtual angular frequency ⁇ is obtained by adding the virtual angular frequency deviation ⁇ and the rated angular frequency ⁇ 0 of the power grid. Then, the virtual internal potential phase ⁇ is obtained by integrating the virtual angular frequency ⁇ (expressed as 1/s in FIG. 2 ).
  • the first intermediate virtual angular frequency deviation may be determined based on the deviation between the DC bus voltage measurement value u dc and the DC bus voltage reference value u dcref of the voltage source wind turbine generator set.
  • the first intermediate virtual angular frequency deviation can be obtained by performing a proportional-integral (PI) operation on the deviation between the DC bus voltage measurement value u dc and the DC bus voltage reference value u dcref of the voltage source wind turbine generator set.
  • PI proportional-integral
  • the DC bus power setting value P DC can be obtained by performing proportional integral (PI) calculation on the deviation between the DC bus voltage measurement value u dc and the DC bus voltage reference value u dcref of the voltage source wind turbine generator set , and the first intermediate virtual angular frequency deviation can be determined by inputting the DC bus power setting value P DC into the virtual inertial damping link.
  • the second active power can be obtained based on the torque demand value T demand * of the wind turbine, the speed ⁇ w of the wind turbine, the grid-connected voltage u dq in the dq coordinate system, and the filter inductor current i dq in the dq coordinate system power deviation.
  • the difference between the power demand Pw of the wind turbine and the grid-side power Pgrd of the grid-side converter of the voltage source wind turbine can be determined as the second active power deviation.
  • a second virtual angular frequency deviation may be determined based on the second active power deviation.
  • the second intermediate virtual angular frequency deviation can be determined by inputting the second active power deviation into the virtual inertial damping link.
  • the virtual internal potential phase ⁇ may be determined based on the first virtual angular frequency deviation and the second virtual angular frequency deviation.
  • the virtual angular frequency ⁇ can be obtained by adding the first virtual angular frequency deviation, the second virtual angular frequency deviation and the rated angular frequency ⁇ 0 of the grid, and then the virtual internal potential phase ⁇ can be obtained by integrating the virtual angular frequency ⁇ .
  • the adjusted d-axis component u d ' of the grid-connected voltage is determined based on the fundamental component and harmonic component of the d-axis component u d of the grid-connected voltage in the dq coordinate system, and Based on the fundamental wave component and harmonic component u q of the q-axis component u q of the grid-connected voltage in the dq coordinate system, the adjusted q-axis component u q ' of the grid-connected voltage is determined.
  • Fig. 3 is a schematic block diagram of an example of adjusting fundamental and harmonic components of a grid-connected voltage according to an embodiment of the present disclosure.
  • the fundamental wave component and the harmonic component of the d-axis component of the grid-connected voltage can be extracted first, and then the extracted fundamental wave component and the harmonic component of the d-axis component of the grid-connected voltage
  • the harmonic component is adjusted, and finally the fundamental wave component and the harmonic component of the adjusted d-axis component of the grid-connected voltage are combined to obtain the adjusted d-axis component u d ' of the grid-connected voltage.
  • the fundamental and harmonic components of the q-axis component of the grid-connected voltage can be extracted first, and then the extracted fundamental and harmonic components of the q-axis component of the grid-connected voltage The wave component is adjusted, and finally the fundamental wave component and the harmonic component of the q-axis component of the adjusted grid-connected voltage are combined to obtain the adjusted q-axis component u q ' of the grid-connected voltage.
  • the fundamental wave component of the d-axis component of the grid-connected voltage can be obtained by performing low-pass filtering on the d-axis component u d of the grid-connected voltage.
  • a first-order low-pass filter LPF
  • the cut-off frequency of the first-order low-pass filter can be, for example, 5 Hz, but is not limited to this.
  • the harmonic component of the d-axis component of the grid-connected voltage can be obtained by subtracting the fundamental wave component obtained through low-pass filtering from the d-axis component u d of the grid-connected voltage.
  • the fundamental wave component of the d-axis component of the grid-connected voltage can be multiplied by the first fundamental adjustment coefficient k b1 to obtain the adjusted fundamental wave component of the d-axis component of the grid-connected voltage, and the d
  • the fundamental wave component of the axis component is multiplied by the first harmonic adjustment coefficient k h1 to obtain the adjusted harmonic component of the d-axis component of the grid-connected voltage.
  • both the first fundamental adjustment coefficient k b1 and the first harmonic adjustment coefficient k h1 are greater than 0 and less than or equal to 1.
  • the first fundamental adjustment coefficient k b1 and the first harmonic adjustment coefficient k h1 may be the same or different.
  • the fundamental wave component and the harmonic component of the adjusted d-axis component of the grid-connected voltage may be added to obtain the adjusted d-axis component u d ' of the grid-connected voltage.
  • the fundamental wave component of the q-axis component of the grid-connected voltage can be obtained by performing low-pass filtering on the q-axis component u q of the grid-connected voltage.
  • a first-order low-pass filter LPF
  • the cut-off frequency of the first-order low-pass filter can be, for example, 5 Hz, but is not limited to this.
  • the harmonic component of the q-axis component of the grid-connected voltage can be obtained by subtracting the fundamental wave component obtained through low-pass filtering from the q-axis component u q of the grid-connected voltage.
  • the fundamental component of the q-axis component of the grid-connected voltage can be multiplied by the second fundamental adjustment coefficient k b2 to obtain the adjusted fundamental component of the q-axis component of the grid-connected voltage, and the q of the grid-connected voltage
  • the fundamental wave component of the axis component is multiplied by the second harmonic adjustment coefficient k h2 to obtain the adjusted harmonic component of the q-axis component of the grid-connected voltage.
  • both the second fundamental adjustment coefficient k b2 and the second harmonic adjustment coefficient k h2 are greater than 0 and less than or equal to 1.
  • the second fundamental adjustment coefficient k b2 and the second harmonic adjustment coefficient k h2 may be the same or different
  • the first fundamental adjustment coefficient k b1 and the second fundamental adjustment coefficient k b2 may be the same or different
  • the first harmonic The adjustment coefficient k h1 and the second harmonic adjustment coefficient k h2 may be the same or different.
  • the fundamental wave component and the harmonic component of the adjusted q-axis component of the grid-connected voltage may be added to obtain the adjusted q-axis component u q ' of the grid-connected voltage.
  • step S103 according to the d-axis component u d ' of the adjusted grid-connected voltage and the q-axis component u q ' of the adjusted grid-connected voltage, the grid-connected reference voltage in the dq coordinate system
  • the d-axis component U dv * and the q-axis component U qv * of the voltage outer loop control or the voltage outer loop control and the current inner loop control are used to determine the d-axis component u md and the q-axis component u mq of the modulation voltage.
  • the grid-connected reference voltage in the dq coordinate system can be determined based on the reactive power setting value Q 0 of the voltage source wind turbine, the reactive power measurement value Q, and the rated voltage amplitude U 0 of the grid
  • the d-axis component U dv * of the dq coordinate system can be determined as 0 for the q-axis component U qv * of the grid-connected reference voltage.
  • the difference between the reactive power setting value Q 0 and the reactive power measurement value Q can be determined as the disturbance component of the AC bus voltage, and the disturbance amount of the AC bus voltage and the rated voltage amplitude of the AC grid can be determined as The sum of U 0 is determined as the d-axis component u dv * of the grid-connected reference voltage in the dq coordinate system.
  • the voltage outer loop control can be performed on the d-axis component U dv * and the q-axis component U qv * of the grid-connected reference voltage in the dq coordinate system, or by d
  • the axis component U dv * and the q axis component U qv * perform voltage outer loop control and current inner loop control to obtain the d axis component u md and q axis component u mq of the modulation voltage.
  • the d-axis component U dv * and the q-axis component U qv * of the grid-connected reference voltage in the dq coordinate system can be input to the voltage outer loop control module, and at the same time, the dq coordinate system can also be The grid-connected voltage u dq and the grid-connected current i gdq in the dq coordinate system are input to the voltage outer loop control module.
  • the d-axis component U dv * and q-axis component U qv * of the grid-connected reference voltage in the dq coordinate system can be controlled by the voltage outer loop to obtain the d-axis filter inductor current reference value I d * and q Shaft filter inductor current reference value I q * .
  • the d-axis filtered inductor current reference value I d * and the q-axis filtered inductor current reference value I q * can be input to the current inner loop control module, and at the same time, the grid-connected voltage u dq in the dq coordinate system and the dq coordinate system
  • the filtered inductor current i dq is input to the current inner loop control module.
  • the d-axis filtered inductor current reference value I d * and the q-axis filtered inductor current reference value I q * can be controlled by the current inner loop control module to determine the d-axis component u md and q-axis component u of the modulation voltage mq .
  • the voltage outer loop is usually implemented in the following way: the d-axis component U dv * of the grid-connected reference voltage is subtracted from the d-axis component u d ' of the adjusted grid-connected voltage, and the result of the subtraction is divided by the virtual impedance (for example, by The form of the LR circuit is expressed as 1/(Ls+R)), so as to obtain the d-axis filter inductor current reference value I d * ; the q-axis component U qv * of the grid-connected reference voltage minus the d-axis of the adjusted grid-connected voltage Component u q ', and divide the subtraction result by the virtual impedance (for example, expressed as 1/(Ls+R) in the form of LR circuit), so as to obtain the q-axis filter inductor current reference value I q * .
  • a current limiting module can be added between the voltage outer loop control module and the current inner loop control module, so as to limit the current output by the voltage outer loop control module.
  • step S104 according to the virtual internal potential phase ⁇ and the d-axis component u md and q-axis component u mq of the modulation voltage, the grid-side converter of the voltage source wind turbine is controlled to adjust the voltage The injection voltage of the grid-connected point of the source wind turbine.
  • the d-axis component u md and the q-axis component u mq of the modulation voltage can be converted into three-phase voltages in the abc coordinate system or ⁇ coordinate system based on the virtual internal potential phase ⁇ in the dq coordinate system two-phase voltage.
  • the d-axis component u md and the q-axis component u mq of the modulation voltage can be converted into three-phase voltages in the abc coordinate system or
  • the two-phase voltages in the ⁇ coordinate system are then input to the SVPWM (Space Vector Pulse Width Modulation, Space Vector Pulse Width Modulation) module for space vector pulse width modulation.
  • SVPWM Space Vector Pulse Width Modulation, Space Vector Pulse Width Modulation
  • the three-phase voltage/two-phase voltage after space vector pulse width modulation can be input to the grid side converter, and then adjust the injection voltage of the grid connection point of the voltage source wind turbine.
  • the voltage source wind turbine may be a voltage source wind turbine, but the present disclosure is not limited thereto.
  • the control method of the voltage source type wind power generating set in the embodiment of the present disclosure by flexibly adjusting the fundamental wave component and the harmonic component of the grid-connected voltage, the inflexible adjustment of the grid-side converter caused by directly using grid-connected voltage feed-forward is solved
  • the problem can optimize the impedance characteristics of the converter, improve the robustness and stability of the voltage source wind turbine to the grid impedance, and bring about the improvement of the grid side harmonics.
  • Fig. 4 is a block diagram illustrating a control device of a voltage source type wind power generating set according to an embodiment of the present disclosure.
  • the control device of the voltage source type wind power generating set according to the embodiment of the present disclosure can be set in the main controller, converter controller or other controllers of the voltage source type wind power generating set, or implemented as a control device of the voltage source type wind power generating set Master controller, converter controller or other controllers.
  • the control device 400 of a voltage source wind turbine may include a virtual internal potential phase determination unit 410 , a grid-connected voltage adjustment unit 420 , a modulation voltage acquisition unit 430 and a grid-side converter control unit 440 .
  • the voltage source wind turbine may be a voltage source wind turbine, but the present disclosure is not limited thereto.
  • the virtual internal potential phase determination unit 410 can determine the virtual internal potential phase ⁇ based on the measured DC bus voltage u dc and the DC bus voltage reference value u dcref of the voltage source wind turbine. Specifically, the virtual internal potential phase determination unit 410 can be based on the measured value u dc of the DC bus voltage and the reference value u dcref of the DC bus voltage of the voltage source wind turbine generator set, the torque demand value T demand * of the wind turbine generator and the Speed ⁇ w , grid-connected voltage u dq in the dq coordinate system, and filter inductor current i dq in the dq coordinate system to obtain the first active power deviation ⁇ P ref , based on the first active power deviation ⁇ P ref , determine the virtual angular frequency deviation ⁇ , and based on the virtual angular frequency deviation ⁇ , the virtual internal potential phase ⁇ is determined.
  • the virtual internal potential phase determining unit 410 can obtain the DC bus by performing a proportional integral (PI) operation on the deviation between the DC bus voltage measurement value u dc of the voltage source wind turbine generator set and the DC bus voltage reference value u dcref
  • the power setting value P DC can be based on the torque demand value T demand * of the wind turbine and the speed ⁇ w of the wind turbine to obtain the power demand P w of the wind turbine, and can be based on the grid-connected voltage u dq in the dq coordinate system and the filter inductor current idq in the dq coordinate system to obtain the grid-side power P grd of the grid-side converter of the voltage source wind turbine.
  • the virtual internal potential phase determination unit 410 can determine the second phase based on the DC bus power setting value P DC , the power demand P w of the wind turbine, and the grid-side power P grd of the grid-side converter of the voltage source wind turbine generator set. - active power deviation ⁇ P ref .
  • the virtual internal potential phase determination unit 410 may determine the first intermediate virtual angular frequency deviation based on the measured value u dc of the DC bus voltage and the reference value u dcref of the DC bus voltage of the voltage source wind turbine generator set, based on the torque of the wind turbine
  • the demand value T demand * and the speed ⁇ w of the wind turbine, as well as the grid-connected voltage u dq in the dq coordinate system and the filter inductor current i dq in the dq coordinate system are used to obtain the second active power deviation, based on the second active power deviation , determine the second virtual angular frequency deviation ⁇ , and based on the first virtual angular frequency deviation and the second virtual angular frequency deviation, determine the virtual internal potential phase ⁇ .
  • the virtual internal potential phase determining unit 410 can obtain the first intermediate value by performing a proportional integral (PI) operation on the deviation between the DC bus voltage measurement value u dc of the voltage source wind turbine generator set and the DC bus voltage reference value u dcref Virtual angular frequency deviation.
  • PI proportional integral
  • the virtual internal potential phase determination unit 410 can obtain the power demand P w of the wind generator based on the torque demand value T demand * of the wind generator and the speed of the wind generator, based on the grid-connected voltage u dq and dq in the dq coordinate system
  • the filter inductor current idq in the coordinate system is used to obtain the grid-side power P grd of the grid-side converter of the voltage source wind turbine, and based on the power demand P w of the wind turbine and the grid-side power of the voltage source wind turbine
  • the grid-side power P grd of the converter determines the second active power deviation.
  • the grid-connected voltage adjustment unit 420 can determine the adjusted d-axis component u d ' of the grid-connected voltage based on the fundamental component and harmonic component of the d-axis component u d of the grid-connected voltage in the dq coordinate system, and based on the dq coordinates The fundamental wave component and the harmonic component of the q-axis component u q of the grid-connected voltage under the system are determined to determine the q-axis component u q ' of the grid-connected voltage after adjustment.
  • the grid-connected voltage adjustment unit 420 may first extract the fundamental wave component and harmonic component of the d-axis component of the grid-connected voltage, and then adjust the extracted fundamental wave component and harmonic component of the d-axis component of the grid-connected voltage , and finally combine the fundamental and harmonic components of the d-axis component of the adjusted grid-connected voltage to obtain the adjusted d-axis component u d ' of the grid-connected voltage.
  • the grid-connected voltage adjustment unit 420 may multiply the fundamental wave component of the d-axis component of the grid-connected voltage by the first fundamental wave adjustment coefficient k b1 to obtain the adjusted fundamental wave component of the d-axis component of the grid-connected voltage, And the fundamental wave component of the d-axis component of the grid-connected voltage can be multiplied by the first harmonic adjustment coefficient k h1 to obtain the adjusted harmonic component of the d-axis component of the grid-connected voltage.
  • both the first fundamental adjustment coefficient k b1 and the first harmonic adjustment coefficient k h1 are greater than 0 and less than or equal to 1.
  • the grid-connected voltage adjustment unit 420 may first extract the fundamental wave component and harmonic component of the q-axis component of the grid-connected voltage, and then adjust the extracted fundamental wave component and harmonic component of the q-axis component of the grid-connected voltage , and finally combine the fundamental and harmonic components of the q-axis component of the adjusted grid-connected voltage to obtain the adjusted q-axis component u q ' of the grid-connected voltage.
  • the grid-connected voltage adjustment unit 420 may multiply the fundamental wave component of the q-axis component of the grid-connected voltage by the second fundamental wave adjustment coefficient k b2 to obtain the adjusted fundamental wave component of the q-axis component of the grid-connected voltage, And the fundamental wave component of the q-axis component of the grid-connected voltage is multiplied by the second harmonic adjustment coefficient k h2 to obtain the adjusted harmonic component of the q-axis component of the grid-connected voltage.
  • both the second fundamental adjustment coefficient k b2 and the second harmonic adjustment coefficient k h2 are greater than 0 and less than or equal to 1.
  • the modulating voltage acquisition unit 430 can calculate the d-axis component of the grid-connected reference voltage in the dq coordinate system according to the d-axis component u d ' of the adjusted grid-connected voltage and the q-axis component u q ' of the adjusted grid-connected voltage U dv * and q-axis component U qv * perform voltage outer loop control or perform voltage outer loop control and current inner loop control to determine the d-axis component u md and q-axis component u mq of the modulation voltage.
  • control device 400 of the voltage source type wind power generating set may further include a grid-connected reference voltage determining unit (not shown).
  • the grid-connected reference voltage determination unit can determine the grid-connected reference voltage in the dq coordinate system based on the reactive power setting value Q 0 of the voltage source wind turbine, the reactive power measurement value Q, and the rated voltage amplitude U 0 of the grid
  • the d-axis component U dv * of the dq coordinate system, and the q-axis component U qv * of the grid-connected reference voltage in the dq coordinate system is determined to be 0.
  • the grid-side converter control unit 440 can control the grid-side converter of the voltage source wind turbine according to the virtual internal potential phase ⁇ and the d-axis component u md and q-axis component u mq of the modulation voltage, thereby adjusting the voltage source wind turbine Injected voltage at the grid connection point of the wind turbine. Specifically, the grid-side converter control unit 440 can convert the d-axis component u md and the q-axis component u mq of the modulation voltage into three-phase voltages in the abc coordinate system or The two-phase voltage in the ⁇ coordinate system, and then perform space vector pulse width modulation on the three-phase voltage in the abc coordinate system or the two-phase voltage in the ⁇ coordinate system.
  • the grid-side converter control unit 440 can use the three-phase voltage/two-phase voltage after space vector pulse width modulation to control the grid-side converter of the voltage source wind power generating set, thereby regulating the voltage source wind power generation.
  • FIG. 5 is a block diagram illustrating a computing device according to an embodiment of the disclosure.
  • the computing device may be set in the main controller, converter controller or other controllers of the voltage source wind power generating set, or implemented as the main controller, converter controller or other controllers of the voltage source wind power generating set controller.
  • a computing device 500 may include a processor 510 and a memory 520 .
  • the processor 510 may include (but is not limited to) a central processing unit (CPU), a digital signal processor (DSP), a microcomputer, a field programmable gate array (FPGA), a system on a chip (SoC), a microprocessor, an application specific integrated circuit (ASIC) and so on.
  • the memory 520 stores computer programs to be executed by the processor 510 .
  • Memory 520 includes high-speed random access memory and/or non-volatile computer-readable storage media.
  • the computing device 500 may communicate with various components in the voltage source wind power generating set in a wired/wireless communication manner, and may also communicate with the voltage source wind generating set and/or outside the wind farm in a wired/wireless communication manner. devices to communicate.
  • Fig. 6 is a diagram illustrating an example of an application effect of a control method of a voltage source type wind power generating set according to an embodiment of the present disclosure.
  • curve 601 represents the virtual impedance of the converter of the existing voltage source type voltage source wind turbine generator set
  • curve 602 represents the voltage obtained by applying the control method of the voltage source type wind turbine generator set according to an embodiment of the present disclosure.
  • the virtual impedance of the converter of the source-type voltage-source-type wind power generating set, and the curve 603 represents the grid equivalent impedance. It can be seen from FIG. 6 that the magnitude of the virtual impedance shown by the curve 602 is obviously larger than the magnitude of the virtual impedance shown by the curve 601 , so it can play a good role in suppressing oscillation.
  • the control method of the voltage source type wind power generating set may be written as a computer program and stored on a computer-readable storage medium.
  • the computer program is executed by the processor, the above-mentioned control method of the voltage source type wind power generating set can be realized.
  • Examples of computer readable storage media include: Read Only Memory (ROM), Random Access Programmable Read Only Memory (PROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Random Access Memory (RAM), Dynamic Random Access Memory (DRAM), Static Random Access Memory (SRAM), Flash Memory, Nonvolatile Memory, CD-ROM, CD-R, CD+R, CD-RW, CD+RW, DVD-ROM, DVD -R, DVD+R, DVD-RW, DVD+RW, DVD-RAM, BD-ROM, BD-R, BD-R LTH, BD-RE, Blu-ray or Disc storage, Hard Disk Drive (HDD), Solid State Drive ( SSD), memory cards (such as Multimedia Cards, Secure Digital (SD) or Extreme Digital (XD) cards), magnetic tapes, floppy disks, magneto-optical data storage devices, optical data storage devices, hard disks, solid-state disks, and any other device , said any other means configured to store in a non-transitory manner a computer program and any associated
  • the computer program and any associated data, data files and data structures are distributed over a networked computer system such that the computer program and any associated data, data files and data structures are processed by one or more processors or Computers store, access and execute in a distributed fashion.
  • the grid-side converter caused by directly using the grid-connected voltage feed-forward is solved
  • the problem of inflexible adjustment can optimize the impedance characteristics of the converter, improve the robustness and stability of the voltage source wind turbine to the grid impedance, and bring about the improvement of grid-side harmonics.

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Abstract

本公开提供一种电压源型风力发电机组的控制方法和控制装置，所述控制方法包括：确定虚拟内电势相位；确定调整后的并网电压的d轴分量，并且确定调整后的并网电压的q轴分量；确定调制电压的d轴分量和q轴分量；根据虚拟内电势相位以及调制电压的d轴分量和q轴分量，控制电压源型风力发电机组的网侧变流器。

Description

电压源型风力发电机组的控制方法和控制装置 技术领域
本公开涉及风力发电领域，更具体地讲，涉及一种电压源型风力发电机组的控制方法和控制装置。
背景技术
风力发电机是将风能转换成电能的设备。通常，直驱/半直驱电压源型风力发电机组采用全功率变流器并网。全功率变流器可分为机侧变流器和网侧变流器，机侧变流器将风力发电机输出的交流电转换成直流电，而网侧变流器将直流电转换成交流电，以便并网。为了使全功率变流器稳定运行，需要控制机侧变流器和网侧变流器之间的直流母线电压。
全功率变流器有两种并网控制形式：一种是跟网型模式，一种是构网型模式。跟网型模式通过采集电网电压利用锁相技术来跟踪电网电压相位，通过注入与电网电压同相位的有功电流进行有功控制，并通过注入与电网电压相位相差90度的无功电流进行无功控制。构网型模式与同步发电机并网技术相同，通过模拟同步发电机转子运动方程根据转子的加减速来与电网同步，通过调节全功率变流器输出电压与电网电压的相位差(功角)进行有功控制，并通过全功率变流器输出电压与电网电压幅值之差进行无功控制。由于构网型模式的并网特性与同步风电机的并网特性相似，因此可以更好地支撑电网运行。
对于高比率新能源、高比率电力电子装置的双高电力系统，新能源并网复杂程度增加，对构网型变流器性能的要求越来越高。构网型变流器接入风电场中比较分散，场内布线阻抗复杂，这就要求构网型变流器对电网阻抗具有一定的适应能力，能对宽范围的电网阻抗参数具有适配性，既能适应弱电网也能适应强电网的运行要求。电网电压前馈使得构网型变流器的虚拟阻抗的控制变得简单，在构网型变流器的控制中得到广泛应用。然而，电压前馈控制会额外引入一条正反馈回路，使得电压源型风力发电机组的稳定裕度大幅下降，并且使得电压源型风力发电机组对电网阻抗的鲁棒稳定性降低。
具体地，构网型变流器(尤其是网侧变流器)的电压外环控制通常采用如下方式实现，即，并网参考电压减去并网电压后除以虚拟阻抗从而得到滤波电感电流参考值。然而，实际的并网电压除了基波分量外还存在各种谐波分量，上述电压外环控将基波分量和谐波分量一同引入控制中，不具备对基波分量和谐波分量的调控能力，这样将会影响到网侧变流器的控制，从而导致对电网阻抗的鲁棒稳定性降低。
发明内容
本公开的实施例提供一种电压源型风力发电机组的控制方法和控制装置，通过灵活地调节并网电压的基波分量和谐波分量，达到优化变流器阻抗特性的目的。
在一个总的方面，提供一种电压源型风力发电机组的控制方法，所述控制方法包括：基于电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值，确定虚拟内电势相位；基于dq坐标系下的并网电压的d轴分量的基波分量和谐波分量，确定调整后的并网电压的d轴分量，并且基于dq坐标系下的并网电压的q轴分量的基波分量和谐波分量，确定调整后的并网电压的q轴分量；根据调整后的并网电压的d轴分量及q轴分量，通过对dq坐标系下的并网参考电压的d轴分量和q轴分量进行电压外环控制或者进行电压外环控制和电流内环控制，来确定调制电压的d轴分量和q轴分量；根据虚拟内电势相位以及调制电压的d轴分量和q轴分量，控制电压源型风力发电机组的网侧变流器，从而调节电压源型风力发电机组的并网点的注入电压。
在另一总的方面，提供一种电压源型风力发电机组的控制装置，所述控制装置包括：虚拟内电势相位确定单元，被配置为基于电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值，确定虚拟内电势相位；并网电压调整单元，被配置为基于dq坐标系下的并网电压的d轴分量的基波分量和谐波分量，确定调整后的并网电压的d轴分量，并且基于dq坐标系下的并网电压的q轴分量的基波分量和谐波分量，确定调整后的并网电压的q轴分量；调制电压获取单元，被配置为根据调整后的并网电压的d轴分量及q轴分量，通过对dq坐标系下的并网参考电压的d轴分量和q轴分量进行电压外环控制或者进行电压外环控制和电流内环控制，来确定调制电压的d轴分量和q轴分量；网侧变流器控制单元，被配置为根据虚拟内电势相位以及调 制电压的d轴分量和q轴分量，控制电压源型风力发电机组的网侧变流器，从而调节电压源型风力发电机组的并网点的注入电压。
在另一总的方面，提供一种存储有计算机程序的计算机可读存储介质，当所述计算机程序在被处理器执行时，实现如上所述的电压源型风力发电机组的控制方法。
在另一总的方面，提供一种计算装置，所述计算装置包括：处理器；存储器，存储有计算机程序，当所述计算机程序被处理器执行时，实现如上所述的电压源型风力发电机组的控制方法。
在另一总的方面，提供一种电压源型风力发电机组，所述电压源型风力发电机组包括如上所述的电压源型风力发电机组的控制装置，或者如上所述的计算装置。
根据本公开的实施例电压源型风力发电机组的控制方法和控制装置，通过灵活地调节并网电压的基波分量和谐波分量，解决直接使用并网电压前馈导致的网侧变流器调节不灵活的问题，能够优化变流器阻抗特性，提高电压源型风力发电机组对电网阻抗鲁棒稳定性，并且带来网侧谐波的改善。
附图说明
通过下面结合附图进行的描述，本公开的上述和其他目的和特点将会变得更加清楚：
图1是示出根据本公开的实施例的电压源型风力发电机组的控制方法的流程图；
图2是示出根据本公开的实施例的电压源型风力发电机组的控制方法的示意性框图；
图3是根据本公开的实施例的对并网电压的基波分量和谐波分量进行调整的示例的示意性框图；
图4是示出根据本公开的实施例的电压源型风力发电机组的控制装置的框图；
图5是示出根据本公开的实施例的计算装置的框图；
图6是示出根据本公开的实施例的电压源型风力发电机组的控制方法的应用效果的示例的示图。
具体实施方式
提供下面的具体实施方式以帮助读者获得对在此描述的方法、设备和/或系统的全面理解。然而，在理解本申请的公开之后，在此描述的方法、设备和/或系统的各种改变、修改和等同物将是清楚的。例如，在此描述的操作的顺序仅是示例，并且不限于在此阐述的那些顺序，而是除了必须以特定的顺序发生的操作之外，可如在理解本申请的公开之后将是清楚的那样被改变。此外，为了更加清楚和简明，本领域已知的特征的描述可被省略。
在此描述的特征可以以不同的形式来实现，而不应被解释为限于在此描述的示例。相反，已提供在此描述的示例，以仅示出实现在此描述的方法、设备和/或系统的许多可行方式中的一些可行方式，所述许多可行方式在理解本申请的公开之后将是清楚的。
如在此使用的，术语“和/或”包括相关联的所列项中的任何一个以及任何两个或更多个的任何组合。
尽管在此可使用诸如“第一”、“第二”和“第三”的术语来描述各种构件、组件、区域、层或部分，但是这些构件、组件、区域、层或部分不应被这些术语所限制。相反，这些术语仅用于将一个构件、组件、区域、层或部分与另一构件、组件、区域、层或部分进行区分。因此，在不脱离示例的教导的情况下，在此描述的示例中所称的第一构件、第一组件、第一区域、第一层或第一部分也可被称为第二构件、第二组件、第二区域、第二层或第二部分。
在说明书中，当元件(诸如，层、区域或基底)被描述为“在”另一元件上、“连接到”或“结合到”另一元件时，该元件可直接“在”另一元件上、直接“连接到”或“结合到”另一元件，或者可存在介于其间的一个或多个其它元件。相反，当元件被描述为“直接在”另一元件上、“直接连接到”或“直接结合到”另一元件时，可不存在介于其间的其它元件。
在此使用的术语仅用于描述各种示例，并不将用于限制公开。除非上下文另外清楚地指示，否则单数形式也意在包括复数形式。术语“包含”、“包括”和“具有”说明存在叙述的特征、数量、操作、构件、元件和/或它们的组合，但不排除存在或添加一个或多个其它特征、数量、操作、构件、元件和/或它们的组合。
除非另有定义，否则在此使用的所有术语(包括技术术语和科学术语)具有与由本公开所属领域的普通技术人员在理解本公开之后通常理解的含义相同的含义。除非在此明确地如此定义，否则术语(诸如，在通用词典中定义的术语)应被解释为具有与它们在相关领域的上下文和本公开中的含义一致的含义，并且不应被理想化或过于形式化地解释。
此外，在示例的描述中，当认为公知的相关结构或功能的详细描述将引起对本公开的模糊解释时，将省略这样的详细描述。
图1是示出根据本公开的实施例的电压源型风力发电机组的控制方法的流程图。图2是示出根据本公开的实施例的电压源型风力发电机组的控制方法的示意性框图。根据本公开的实施例的电压源型风力发电机组的控制方法可由电压源型风力发电机组的主控制器、变流器控制器或者其他专用控制器来执行。
参照图1，在步骤S101中，基于电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref，确定虚拟内电势相位θ。
根据本公开的实施例，可首先基于电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref之间的偏差、风力发电机扭矩需求值T demand *和风力发电机的转速(例如，角速度)ω w、dq坐标系下的并网电压u dq和dq坐标系下的滤波电感电流i dq，获取第一有功功率偏差ΔP ref。然后，可基于第一有功功率偏差ΔP ref，确定虚拟角频率偏差Δω。最后，可基于虚拟角频率偏差Δω，确定虚拟内电势相位θ。
更具体地讲，电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值之间的偏差可以是直流母线电压测量值与直流母线电压参考值的差值或平方差值，但本公开不限于此，还可以是其它形式的偏差。如图2所示，以直流母线电压测量值u dc与直流母线电压参考值u dcref的平方差值(即，
Figure PCTCN2022080145-appb-000001
)为例进行说明，但本公开不限于此。进一步参照图2，可通过对电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref之间的偏差进行比例积分(PI)运算，获得直流母线功率设定值P DC。比例运算环节被表示为K P_DC，积分运算环节被表示为K i_dc/s，其中，K P_DC表示比例系数，K i_dc表示积分系数。此外，可基于风力发电机扭矩需求值T demand *和风力发电机的转速(例如，角速度)ω w，获得风力发电机的功率需求P w，并且可基于dq坐标系下的并网电压u dq和dq坐标系下的滤波电感电流i dq，获 得电压源型风力发电机组的网侧变流器的网侧功率P grd。例如，可将风力发电机扭矩需求值T demand *和风力发电机的转速ω w的乘积计算为风力发电机的功率需求P w。此外，可计算dq坐标系下的并网电压u dq的d轴分量u d与并网电流i dq的d轴分量i d的乘积以及dq坐标系下的并网电压u dq的q轴分量u q与并网电流i dq的q轴分量i q的乘积，计算两个乘积之和，然后乘以预定系数，获得电压源型风力发电机组的网侧变流器的网侧功率P grd。这里，预定系数可以为例如3/2。然后，可基于直流母线功率设定值P DC、风力发电机的功率需求P w和电压源型风力发电机组的网侧变流器的网侧功率P grd，确定第一有功功率偏差ΔP ref。例如，可将直流母线功率设定值P DC与风力发电机的功率需求P w相加，然后减去电压源型风力发电机组的网侧变流器的网侧功率P grd，得到第一有功功率偏差ΔP ref。此外，如图2所示，可通过对网侧滤波电感电流i abc、并网电压u abc和并网电流i gabc，进行坐标变换(例如，克拉克-帕克变换，即，abc/dq变换)，获取dq坐标系下的滤波电感电流i dq、dq坐标系下的并网电压u dq和dq坐标系下的并网电流i gdq。
可选择地，可在比例积分运算环节之后设置功率限幅模块，从而对经由比例积分运算环节获得的直流母线功率设定值P DC进行限幅。
在确定第一有功功率偏差ΔP ref之后，可基于第一有功功率偏差ΔP ref，通过虚拟惯性阻尼环节确定虚拟角频率偏差Δω。如图2所示，虚拟惯性阻尼环节可被表示为1/(sK J+K D)，其中，K J表示虚拟惯量系数，K D表示虚拟阻尼系数。在确定虚拟角频率偏差Δω之后，可基于虚拟角频率偏差Δω和电网的额定角频率ω 0，确定虚拟角频率ω，然后可基于虚拟角频率ω确定虚拟内电势相位θ。如图2所示，虚拟角频率偏差Δω和电网的额定角频率ω 0相加得到虚拟角频率ω。然后，通过对虚拟角频率ω进行积分(在图2中表示为1/s)运算得到虚拟内电势相位θ。
根据本公开的另一实施例，可首先基于电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref之间的偏差，确定第一中间虚拟角频率偏差。例如，可通过对电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref之间的偏差进行比例积分(PI)运算，获得第一中间虚拟角频率偏差。具体地讲，可通过对电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref之间的偏差进行比例积分(PI)运算，获得直流母线功率设定值P DC，并且可通过将直流母线功率设定 值P DC输入虚拟惯性阻尼环节，来确定第一中间虚拟角频率偏差。接下来，可基于风力发电机扭矩需求值T demand *和风力发电机的转速ω w、以及dq坐标系下的并网电压u dq和dq坐标系下的滤波电感电流i dq，获取第二有功功率偏差。例如，可将风力发电机的功率需求P w与电压源型风力发电机组的网侧变流器的网侧功率P grd之差确定为第二有功功率偏差。随后，可基于第二有功功率偏差，确定第二虚拟角频率偏差。例如，可通过将第二有功功率偏差输入虚拟惯性阻尼环节，来确定第二中间虚拟角频率偏差。最后，可基于第一虚拟角频率偏差和第二虚拟角频率偏差，确定虚拟内电势相位θ。例如，可将第一虚拟角频率偏差、第二虚拟角频率偏差和电网的额定角频率ω 0相加得到虚拟角频率ω，然后通过对虚拟角频率ω进行积分运算得到虚拟内电势相位θ。
返回参照图1，在步骤S102中，基于dq坐标系下的并网电压的d轴分量u d的基波分量和谐波分量，确定调整后的并网电压的d轴分量u d＇，并且基于dq坐标系下的并网电压的q轴分量u q的基波分量和谐波分量u q，确定调整后的并网电压的q轴分量u q＇。
图3是根据本公开的实施例的对并网电压的基波分量和谐波分量进行调整的示例的示意性框图。
参照图3，针对并网电压的d轴分量u d，可首先提取并网电压的d轴分量的基波分量和谐波分量，然后对提取的并网电压的d轴分量的基波分量和谐波分量进行调整，最后对经过调整的并网电压的d轴分量的基波分量和谐波分量进行组合，以获取调整后的并网电压的d轴分量u d＇。类似地，针对并网电压的q轴分量u q，可首先提取并网电压的q轴分量的基波分量和谐波分量，然后对提取的并网电压的q轴分量的基波分量和谐波分量进行调整，最后对经过调整的并网电压的q轴分量的基波分量和谐波分量进行组合，以获取调整后的并网电压的q轴分量u q＇。
更具体地讲，可通过对并网电压的d轴分量u d进行低通滤波，以获取并网电压的d轴分量的基波分量。根据本公开的实施例，可选择一阶低通滤波器(LPF)对并网电压的d轴分量u d进行低通滤波，一阶低通滤波器的截止频率可以为例如5Hz，但不限于此。同时，可通过从并网电压的d轴分量u d减去经过低通滤波获取的基波分量，以获取并网电压的d轴分量的谐波分量。随后，可将并网电压的d轴分量的基波分量乘以第一基波调整系数k b1，以获取经过调整的并网电压的d轴分量的基波分量，并且将并网电压的d轴分量 的基波分量乘以第一谐波调整系数k h1，以获取经过调整的并网电压的d轴分量的谐波分量。这里，第一基波调整系数k b1和第一谐波调整系数k h1均可大于0且小于或等于1。此外，第一基波调整系数k b1和第一谐波调整系数k h1可以相同或不同。可选择地，可将经过调整的并网电压的d轴分量的基波分量和谐波分量相加，从而获取调整后的并网电压的d轴分量u d＇。
另一方面，可通过对并网电压的q轴分量u q进行低通滤波，以获取并网电压的q轴分量的基波分量。根据本公开的实施例，可选择一阶低通滤波器(LPF)对并网电压的q轴分量u q进行低通滤波，一阶低通滤波器的截止频率可以为例如5Hz，但不限于此。同时，可通过从并网电压的q轴分量u q减去经过低通滤波获取的基波分量，以获取并网电压的q轴分量的谐波分量。随后，可将并网电压的q轴分量的基波分量乘以第二基波调整系数k b2，以获取经过调整的并网电压的q轴分量的基波分量，并且将并网电压的q轴分量的基波分量乘以第二谐波调整系数k h2，以获取经过调整的并网电压的q轴分量的谐波分量。这里，第二基波调整系数k b2和第二谐波调整系数k h2均可大于0且小于或等于1。此外，第二基波调整系数k b2和第二谐波调整系数k h2可以相同或不同，第一基波调整系数k b1和第二基波调整系数k b2可以相同或不同，第一谐波调整系数k h1和第二谐波调整系数k h2可以相同或不同。可选择地，可将经过调整的并网电压的q轴分量的基波分量和谐波分量相加，从而获取调整后的并网电压的q轴分量u q＇。
返回参照图1，在步骤S103中，根据调整后的并网电压的d轴分量u d＇以及调整后的并网电压的q轴分量u q＇，通过对dq坐标系下的并网参考电压的d轴分量U dv *和q轴分量U qv *进行电压外环控制或者进行电压外环控制和电流内环控制，来确定调制电压的d轴分量u md和q轴分量u mq。
如图2所示，可基于电压源型风力发电机组的无功功率设定值Q 0、无功功率测量值Q、电网的额定电压幅值U 0，确定dq坐标系下的并网参考电压的d轴分量U dv *，并且可将dq坐标系下的并网参考电压的q轴分量U qv *确定为0。具体地讲，可将无功功率设定值Q 0和无功功率测量值Q的差值确定为交流母线电压的扰动分量，并且可将交流母线电压的扰动量和交流电网的额定电压幅值U 0之和确定为dq坐标系下的并网参考电压的d轴分量u dv *。
进一步讲，可通过对dq坐标系下的并网参考电压的d轴分量U dv *和q轴分量U qv *仅进行电压外环控制，或者通过对dq坐标系下的并网参考电压的d 轴分量U dv *和q轴分量U qv *进行电压外环控制与电流内环控制，来获得调制电压的d轴分量u md和q轴分量u mq。
例如，如图2所示，可将dq坐标系下的并网参考电压的d轴分量U dv *和q轴分量U qv *输入至电压外环控制模块，同时，还可将dq坐标系下的并网电压u dq和dq坐标系下的并网电流i gdq输入至电压外环控制模块。通过电压外环控制模块可以对dq坐标系下的并网参考电压的d轴分量U dv *和q轴分量U qv *进行电压外环控制，得到d轴滤波电感电流参考值I d *和q轴滤波电感电流参考值I q *。可将d轴滤波电感电流参考值I d *和q轴滤波电感电流参考值I q *输入至电流内环控制模块，同时，还可将dq坐标系下的并网电压u dq和dq坐标系下的滤波电感电流i dq输入至电流内环控制模块。通过电流内环控制模块可以对d轴滤波电感电流参考值I d *和q轴滤波电感电流参考值I q *进行电流内环控制，来确定调制电压的d轴分量u md和q轴分量u mq。
电压外环通常采用如下方式实现：并网参考电压的d轴分量U dv *减去调整后的并网电压的d轴分量u d＇，并将相减的结果除以虚拟阻抗(例如，以LR电路的形式表示为1/(Ls+R))，从而得到d轴滤波电感电流参考值I d *；并网参考电压的q轴分量U qv *减去调整后的并网电压的d轴分量u q＇，并将相减的结果除以虚拟阻抗(例如，以LR电路的形式表示为1/(Ls+R))，从而得到q轴滤波电感电流参考值I q *。
可选择地，可在电压外环控制模块和电流内环控制模块之间添加电流限幅模块，从而对电压外环控制模块输出的电流进行限幅。
此外，通过如图2所示的电压外环控制模块进行适当改造，可以在不进行电流内环控制的情况下，仅根据调整后的并网电压的d轴分量u d＇以及调整后的并网电压的q轴分量u q＇，通过对dq坐标系下的并网参考电压的d轴分量U dv *和q轴分量U qv *进行电压外环控制，来确定调制电压的d轴分量u md和q轴分量u mq。
再次返回参照图1，在步骤S104中，根据虚拟内电势相位θ以及调制电压的d轴分量u md和q轴分量u mq，控制电压源型风力发电机组的网侧变流器，从而调节电压源型风力发电机组的并网点的注入电压。
根据本公开的实施例，可基于dq坐标系下的虚拟内电势相位θ将调制电压的d轴分量u md和q轴分量u mq转换为abc坐标系下的三相电压或αβ坐标系下的两相电压。例如，如图2所示，可通过坐标转换模块基于dq坐标系下 的虚拟内电势相位θ将调制电压的d轴分量u md和q轴分量u mq转换为abc坐标系下的三相电压或αβ坐标系下的两相电压，然后输入至SVPWM(Space Vector Pulse Width Modulation，空间矢量脉宽调制)模块，进行空间矢量脉宽调制。经过空间矢量脉宽调制后的三相电压/两相电压可输入至网侧变流器，进而调节电压源型风力发电机组的并网点的注入电压。这里，电压源型风力发电机组可以是电压源型电压源型风力发电机组，但是本公开不限于此。
根据本公开的实施例电压源型风力发电机组的控制方法，通过灵活地调节并网电压的基波分量和谐波分量，解决直接使用并网电压前馈导致的网侧变流器调节不灵活的问题，能够优化变流器阻抗特性，提高电压源型风力发电机组对电网阻抗鲁棒稳定性，并且带来网侧谐波的改善。
图4是示出根据本公开的实施例的电压源型风力发电机组的控制装置的框图。根据本公开的实施例的电压源型风力发电机组的控制装置可设置电压源型风力发电机组的主控制器、变流器控制器或者其他控制器中，或者实现为电压源型风力发电机组的主控制器、变流器控制器或者其他控制器。
参照图4，电压源型风力发电机组的控制装置400可包括虚拟内电势相位确定单元410、并网电压调整单元420、调制电压获取单元430和网侧变流器控制单元440。这里，电压源型风力发电机组可以是电压源型电压源型风力发电机组，但是本公开不限于此。
虚拟内电势相位确定单元410可基于电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref，确定虚拟内电势相位θ。具体地讲，虚拟内电势相位确定单元410可基于电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref、风力发电机扭矩需求值T demand *和风力发电机的转速ω w、以及dq坐标系下的并网电压u dq和dq坐标系下的滤波电感电流i dq，来获取第一有功功率偏差ΔP ref，基于第一有功功率偏差ΔP ref，确定虚拟角频率偏差Δω，并且基于虚拟角频率偏差Δω，确定虚拟内电势相位θ。进一步讲，虚拟内电势相位确定单元410可通过对电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref之间的偏差进行比例积分(PI)运算，获得直流母线功率设定值P DC，可基于风力发电机扭矩需求值T demand *和风力发电机的转速ω w，获得风力发电机的功率需求P w，并且可基于dq坐标系下的并网电压u dq和dq坐标系下的滤波电感电流i dq，获得电压源型风力发电机组的网侧变流器的网侧功率P grd。随后，虚拟内电势相位确 定单元410可基于直流母线功率设定值P DC、风力发电机的功率需求P w和电压源型风力发电机组的网侧变流器的网侧功率P grd，确定第一有功功率偏差ΔP ref。
可选择地，虚拟内电势相位确定单元410可基于电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref，确定第一中间虚拟角频率偏差，基于风力发电机扭矩需求值T demand *和风力发电机的转速ω w、以及dq坐标系下的并网电压u dq和dq坐标系下的滤波电感电流i dq，获取第二有功功率偏差，基于第二有功功率偏差，确定第二虚拟角频率偏差Δω，并且基于第一虚拟角频率偏差和第二虚拟角频率偏差，确定虚拟内电势相位θ。例如，虚拟内电势相位确定单元410可通过对电压源型风力发电机组的直流母线电压测量值u dc与直流母线电压参考值u dcref之间的偏差进行比例积分(PI)运算，获得第一中间虚拟角频率偏差。此外，虚拟内电势相位确定单元410可基于风力发电机扭矩需求值T demand *和风力发电机的转速，获得风力发电机的功率需求P w，基于dq坐标系下的并网电压u dq和dq坐标系下的滤波电感电流i dq，获得电压源型风力发电机组的网侧变流器的网侧功率P grd，并且基于风力发电机的功率需求P w和电压源型风力发电机组的网侧变流器的网侧功率P grd，确定第二有功功率偏差。
并网电压调整单元420可基于dq坐标系下的并网电压的d轴分量u d的基波分量和谐波分量，确定调整后的并网电压的d轴分量u d＇，并且基于dq坐标系下的并网电压的q轴分量u q的基波分量和谐波分量，确定调整后的并网电压的q轴分量u q＇。
具体地讲，并网电压调整单元420可首先提取并网电压的d轴分量的基波分量和谐波分量，然后对提取的并网电压的d轴分量的基波分量和谐波分量进行调整，最后对经过调整的并网电压的d轴分量的基波分量和谐波分量进行组合，以获取调整后的并网电压的d轴分量u d＇。进一步讲，并网电压调整单元420可将并网电压的d轴分量的基波分量乘以第一基波调整系数k b1，以获取经过调整的并网电压的d轴分量的基波分量，并且可将并网电压的d轴分量的基波分量乘以第一谐波调整系数k h1，以获取经过调整的并网电压的d轴分量的谐波分量。这里，第一基波调整系数k b1和第一谐波调整系数k h1均可大于0且小于或等于1。
另一方面，并网电压调整单元420可首先提取并网电压的q轴分量的基 波分量和谐波分量，然后对提取的并网电压的q轴分量的基波分量和谐波分量进行调整，最后对经过调整的并网电压的q轴分量的基波分量和谐波分量进行组合，以获取调整后的并网电压的q轴分量u q＇。进一步讲，并网电压调整单元420可将并网电压的q轴分量的基波分量乘以第二基波调整系数k b2，以获取经过调整的并网电压的q轴分量的基波分量，并且将并网电压的q轴分量的基波分量乘以第二谐波调整系数k h2，以获取经过调整的并网电压的q轴分量的谐波分量。这里，第二基波调整系数k b2和第二谐波调整系数k h2均可大于0且小于或等于1。
调制电压获取单元430可根据调整后的并网电压的d轴分量u d＇以及调整后的并网电压的q轴分量u q＇，通过对dq坐标系下的并网参考电压的d轴分量U dv *和q轴分量U qv *进行电压外环控制或者进行电压外环控制和电流内环控制，来确定调制电压的d轴分量u md和q轴分量u mq。
为了确定dq坐标系下的并网参考电压的d轴分量U dv *和并网参考电压的q轴分量U qv *，电压源型风力发电机组的控制装置400还可包括并网参考电压确定单元(未示出)。并网参考电压确定单元可基于电压源型风力发电机组的无功功率设定值Q 0、无功功率测量值Q、电网的额定电压幅值U 0，确定dq坐标系下的并网参考电压的d轴分量U dv *，并且将dq坐标系下的并网参考电压的q轴分量U qv *确定为0。
网侧变流器控制单元440可根据虚拟内电势相位θ以及调制电压的d轴分量u md和q轴分量u mq，控制电压源型风力发电机组的网侧变流器，从而调节电压源型风力发电机组的并网点的注入电压。具体地讲，网侧变流器控制单元440可基于dq坐标系下的虚拟内电势相位θ将调制电压的d轴分量u md和q轴分量u mq转换为abc坐标系下的三相电压或αβ坐标系下的两相电压，然后对abc坐标系下的三相电压或αβ坐标系下的两相电压进行空间矢量脉宽调制。其后，网侧变流器控制单元440可利用经过空间矢量脉宽调制后的三相电压/两相电压来控制电压源型风力发电机组的网侧变流器，从而调节电压源型风力发电机组的并网点的注入电压。
图5是示出根据本公开的实施例的计算装置的框图。所述计算装置可设置在电压源型风力发电机组的主控制器、变流器控制器或者其他控制器中，或者实现为电压源型风力发电机组的主控制器、变流器控制器或者其他控制器。
参照图5，根据本公开的实施例的计算装置500可包括处理器510和存储器520。处理器510可包括(但不限于)中央处理器(CPU)、数字信号处理器(DSP)、微型计算机、现场可编程门阵列(FPGA)、片上系统(SoC)、微处理器、专用集成电路(ASIC)等。存储器520存储将由处理器510执行的计算机程序。存储器520包括高速随机存取存储器和/或非易失性计算机可读存储介质。当处理器510执行存储器520中存储的计算机程序时，可实现如上所述的电压源型风力发电机组的控制方法。
可选择地，计算装置500可以以有线/无线通信方式与电压源型风力发电机组中的各个组件进行通信，并且还可以以有线/无线通信方式与电压源型风力发电机组和/或风电场外部的设备进行通信。
图6是示出根据本公开的实施例的电压源型风力发电机组的控制方法的应用效果的示例的示图。
参照图6，曲线601表示现有的电压源型电压源型风力发电机组的变流器的虚拟阻抗，曲线602表示应用根据本公开的实施例的电压源型风力发电机组的控制方法获得的电压源型电压源型风力发电机组的变流器的虚拟阻抗，曲线603表示电网等效阻抗。从图6中可以看出，曲线602所示的虚拟阻抗的幅值明显大于曲线601所示的虚拟阻抗的幅值，因此能够起到很好的抑制振荡的作用。
根据本公开的实施例的电压源型风力发电机组的控制方法可被编写为计算机程序并被存储在计算机可读存储介质上。当所述计算机程序被处理器执行时，可实现如上所述的电压源型风力发电机组的控制方法。计算机可读存储介质的示例包括：只读存储器(ROM)、随机存取可编程只读存储器(PROM)、电可擦除可编程只读存储器(EEPROM)、随机存取存储器(RAM)、动态随机存取存储器(DRAM)、静态随机存取存储器(SRAM)、闪存、非易失性存储器、CD-ROM、CD-R、CD+R、CD-RW、CD+RW、DVD-ROM、DVD-R、DVD+R、DVD-RW、DVD+RW、DVD-RAM、BD-ROM、BD-R、BD-R LTH、BD-RE、蓝光或光盘存储器、硬盘驱动器(HDD)、固态硬盘(SSD)、卡式存储器(诸如，多媒体卡、安全数字(SD)卡或极速数字(XD)卡)、磁带、软盘、磁光数据存储装置、光学数据存储装置、硬盘、固态盘以及任何其它装置，所述任何其它装置被配置为以非暂时性方式存储计算机程序以及任何相关联的数据、数据文件和数据结构并将所述计算机程序以及任何相关联的 数据、数据文件和数据结构提供给处理器或计算机使得处理器或计算机能执行所述计算机程序。在一个示例中，计算机程序以及任何相关联的数据、数据文件和数据结构分布在联网的计算机系统上，使得计算机程序以及任何相关联的数据、数据文件和数据结构通过一个或多个处理器或计算机以分布式方式存储、访问和执行。
根据本公开的实施例电压源型风力发电机组的控制方法和控制装置，通过灵活地调节并网电压的基波分量和谐波分量，解决直接使用并网电压前馈导致的网侧变流器调节不灵活的问题，能够优化变流器阻抗特性，提高电压源型风力发电机组对电网阻抗鲁棒稳定性，并且带来网侧谐波的改善。
虽然已表示和描述了本公开的一些实施例，但本领域技术人员应该理解，在不脱离由权利要求及其等同物限定其范围的本公开的原理和精神的情况下，可以对这些实施例进行修改。

Claims (16)

  1. 一种电压源型风力发电机组的控制方法，所述控制方法包括：
    基于电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值，确定虚拟内电势相位；
    基于dq坐标系下的并网电压的d轴分量的基波分量和谐波分量，确定调整后的并网电压的d轴分量，并且基于dq坐标系下的并网电压的q轴分量的基波分量和谐波分量，确定调整后的并网电压的q轴分量；
    根据调整后的并网电压的d轴分量及q轴分量，通过对dq坐标系下的并网参考电压的d轴分量和q轴分量进行电压外环控制或者进行电压外环控制和电流内环控制，来确定调制电压的d轴分量和q轴分量；
    根据虚拟内电势相位以及调制电压的d轴分量和q轴分量，控制电压源型风力发电机组的网侧变流器，从而调节电压源型风力发电机组的并网点的注入电压。
  2. 如权利要求1所述的电压源型风力发电机组的控制方法，其中，确定虚拟内电势相位的步骤包括：
    基于电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值、风力发电机扭矩需求值和风力发电机的转速、以及dq坐标系下的并网电压和dq坐标系下的滤波电感电流，获取第一有功功率偏差；
    基于第一有功功率偏差，确定虚拟角频率偏差；
    基于虚拟角频率偏差，确定虚拟内电势相位。
  3. 如权利要求2所述的电压源型风力发电机组的控制方法，其中，获取第一有功功率偏差的步骤包括：
    通过对电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值之间的偏差进行比例积分运算，获得直流母线功率设定值；
    基于风力发电机扭矩需求值和风力发电机的转速，获得风力发电机的功率需求；
    基于dq坐标系下的并网电压和dq坐标系下的滤波电感电流，获得电压源型风力发电机组的网侧变流器的网侧功率；
    基于直流母线功率设定值、风力发电机的功率需求和电压源型风力发电机组的网侧变流器的网侧功率，确定第一有功功率偏差。
  4. 如权利要求1所述的电压源型风力发电机组的控制方法，其中，确定虚拟内电势相位的步骤包括：
    基于电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值，确定第一中间虚拟角频率偏差；
    基于风力发电机扭矩需求值和风力发电机的转速、以及dq坐标系下的并网电压和dq坐标系下的滤波电感电流，获取第二有功功率偏差；
    基于第二有功功率偏差，确定第二虚拟角频率偏差；
    基于第一虚拟角频率偏差和第二虚拟角频率偏差，确定虚拟内电势相位。
  5. 如权利要求4所述的电压源型风力发电机组的控制方法，其中，
    确定第一中间虚拟角频率偏差的步骤包括：通过对电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值之间的偏差进行比例积分运算，获得第一中间虚拟角频率偏差；
    获取第二有功功率偏差的步骤包括：基于风力发电机扭矩需求值和风力发电机的转速，获得风力发电机的功率需求；基于dq坐标系下的并网电压和dq坐标系下的滤波电感电流，获得电压源型风力发电机组的网侧变流器的网侧功率；基于风力发电机的功率需求和电压源型风力发电机组的网侧变流器的网侧功率，确定第二有功功率偏差。
  6. 如权利要求1所述的电压源型风力发电机组的控制方法，其中，所述控制方法还包括：
    基于电压源型风力发电机组的无功功率设定值、无功功率测量值、电网的额定电压幅值，确定dq坐标系下的并网参考电压的d轴分量，并且将dq坐标系下的并网参考电压的q轴分量确定为0。
  7. 如权利要求1所述的电压源型风力发电机组的控制方法，其中，确定调整后的并网电压的d轴分量的步骤包括：
    提取并网电压的d轴分量的基波分量和谐波分量；
    对提取的并网电压的d轴分量的基波分量和谐波分量进行调整；
    对经过调整的并网电压的d轴分量的基波分量和谐波分量进行组合，以获取调整后的并网电压的d轴分量。
  8. 如权利要求7所述的电压源型风力发电机组的控制方法，其中，对提取的并网电压的d轴分量的基波分量和谐波分量进行调整的步骤包括：
    将并网电压的d轴分量的基波分量乘以第一基波调整系数，以获取经过 调整的并网电压的d轴分量的基波分量；
    将并网电压的d轴分量的基波分量乘以第一谐波调整系数，以获取经过调整的并网电压的d轴分量的谐波分量；
    其中，第一基波调整系数和第一谐波调整系数均大于0且小于或等于1。
  9. 如权利要求1所述的电压源型风力发电机组的控制方法，其中，确定调整后的并网电压的q轴分量的步骤包括：
    提取并网电压的q轴分量的基波分量和谐波分量；
    对提取的并网电压的q轴分量的基波分量和谐波分量进行调整；
    对经过调整的并网电压的q轴分量的基波分量和谐波分量进行组合，以获取调整后的并网电压的q轴分量。
  10. 如权利要求9所述的电压源型风力发电机组的控制方法，其中，对提取的并网电压的q轴分量的基波分量和谐波分量进行调整的步骤包括：
    将并网电压的q轴分量的基波分量乘以第二基波调整系数，以获取经过调整的并网电压的q轴分量的基波分量；
    将并网电压的q轴分量的基波分量乘以第二谐波调整系数，以获取经过调整的并网电压的q轴分量的谐波分量；
    其中，第二基波调整系数和第二谐波调整系数均大于0且小于或等于1。
  11. 一种电压源型风力发电机组的控制装置，所述控制装置包括：
    虚拟内电势相位确定单元，被配置为基于电压源型风力发电机组的直流母线电压测量值与直流母线电压参考值，确定虚拟内电势相位；
    并网电压调整单元，被配置为基于dq坐标系下的并网电压的d轴分量的基波分量和谐波分量，确定调整后的并网电压的d轴分量，并且基于dq坐标系下的并网电压的q轴分量的基波分量和谐波分量，确定调整后的并网电压的q轴分量；
    调制电压获取单元，被配置为根据调整后的并网电压的d轴分量及q轴分量，通过对dq坐标系下的并网参考电压的d轴分量和q轴分量进行电压外环控制或者进行电压外环控制和电流内环控制，来确定调制电压的d轴分量和q轴分量；
    网侧变流器控制单元，被配置为根据虚拟内电势相位以及调制电压的d轴分量和q轴分量，控制电压源型风力发电机组的网侧变流器，从而调节电压源型风力发电机组的并网点的注入电压。
  12. 如权利要求11所述的电压源型风力发电机组的控制装置，其中，所述电压源型风力发电机组的控制装置设置在变流器控制器中。
  13. 一种存储有计算机程序的计算机可读存储介质，当所述计算机程序在被处理器执行时实现如权利要求1至10中任意一项所述的电压源型风力发电机组的控制方法。
  14. 一种计算装置，所述计算装置包括：
    处理器；
    存储器，存储有计算机程序，当所述计算机程序被处理器执行时，实现如权利要求1至10中任意一项所述的电压源型风力发电机组的控制方法。
  15. 如权利要求14所述的计算装置，其中，所述计算装置为电压源型风力发电机组的变流器控制器。
  16. 一种电压源型风力发电机组，所述电压源型风力发电机组包括如权利要求11所述的电压源型风力发电机组的控制装置，或者如权利要求14与15中任一项所述的计算装置。
PCT/CN2022/080145 2021-12-15 2022-03-10 电压源型风力发电机组的控制方法和控制装置 WO2023108923A1 (zh)

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* Cited by examiner, † Cited by third party
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US20160006366A1 (en) * 2013-03-20 2016-01-07 Sma Solar Technology Ag Inverter and operating method for an inverter
CN112217235A (zh) * 2020-10-22 2021-01-12 合肥工业大学 基于储能协调控制的电压源型全功率风电机组控制方法
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CN113328458A (zh) * 2020-12-15 2021-08-31 新疆金风科技股份有限公司 并网逆变器的前馈控制方法、装置以及计算机可读存储介质

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CN112217235A (zh) * 2020-10-22 2021-01-12 合肥工业大学 基于储能协调控制的电压源型全功率风电机组控制方法
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