CN110970941A - Method for accurately calculating reactive output range of double-fed wind generating set - Google Patents

Method for accurately calculating reactive output range of double-fed wind generating set Download PDF

Info

Publication number
CN110970941A
CN110970941A CN201911367995.4A CN201911367995A CN110970941A CN 110970941 A CN110970941 A CN 110970941A CN 201911367995 A CN201911367995 A CN 201911367995A CN 110970941 A CN110970941 A CN 110970941A
Authority
CN
China
Prior art keywords
output range
side converter
grid
dfig
reactive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201911367995.4A
Other languages
Chinese (zh)
Other versions
CN110970941B (en
Inventor
华亮亮
刘明昌
李�赫
黄伟
郭天飞
郑明杨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tongliao Power Supply Co Of State Grid East Inner Mongolia Electric Power Co
North China Electric Power University
Original Assignee
Tongliao Power Supply Co Of State Grid East Inner Mongolia Electric Power Co
North China Electric Power University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tongliao Power Supply Co Of State Grid East Inner Mongolia Electric Power Co, North China Electric Power University filed Critical Tongliao Power Supply Co Of State Grid East Inner Mongolia Electric Power Co
Priority to CN201911367995.4A priority Critical patent/CN110970941B/en
Publication of CN110970941A publication Critical patent/CN110970941A/en
Application granted granted Critical
Publication of CN110970941B publication Critical patent/CN110970941B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/50—Controlling the sharing of the out-of-phase component
    • 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

Abstract

The invention provides an accurate calculation method for a reactive output range of a double-fed wind generating set, which is based on a dynamic model of the double-fed wind generating set under the orientation of the voltage of a power grid, considers the reactive loss of a filter inductor of a grid-side converter, considers two factors of capacity limitation and maximum operating current of the grid-side converter in the reactive output range of the grid-side converter, considers the influence of three factors of capacity of a rotor-side converter, operating current of the rotor-side converter and DFIG (doubly-fed induction generator) capacity in the reactive output range of a stator, and realizes the accurate calculation of the reactive output range of the double-fed wind generating set. The method not only can realize the accurate calculation of the reactive output range of the whole wind power plant or the distributed wind turbine generator, but also can provide a basis for reasonably configuring reactive compensation equipment of the wind power plant, and reasonably adjusting the voltage of the reactive participation system of the generator and reasonably scheduling.

Description

Method for accurately calculating reactive output range of double-fed wind generating set
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to an accurate calculation method for a reactive power output range of a double-fed wind generating set.
Background
The reactive power output range calculation method of the existing doubly-fed wind generating set ignores the reactive power loss of the filter inductor of the grid-side converter, and considers that the reactive power output by the rotor winding is the reactive power transmitted to the power grid. In addition, the current calculation method only considers the current limit of the rotor-side converter and the capacity limit of the grid-side converter when finally determining the reactive output range of the unit, other limiting factors are only simply explained, and the reactive output range of the unit under the operation under the full working condition cannot be accurately disclosed.
Disclosure of Invention
In order to solve the problems, the reactive power loss of the filter inductance of the grid-side converter is considered based on a dynamic model of the doubly-fed wind turbine generator set under the grid voltage orientation, the two factors of the capacity limit and the maximum operating current of the grid-side converter are considered in the reactive output range of the grid-side converter, the influence of the three factors of the capacity of the rotor-side converter, the operating current of the rotor-side converter and the DFIG capacity is considered in the reactive output range of the stator, and the accurate calculation of the reactive output range of the doubly-fed wind turbine generator set under the full-working-.
A method for accurately calculating the reactive output range of a doubly-fed wind generating set comprises the following steps:
step 1), establishing a mathematical model of the DFIG under a dq coordinate system, and respectively deducing corresponding expressions under a grid-side converter and a rotor-side converter of the DFIG in a grid voltage orientation mode;
step 2), dividing the operation area of the DFIG by taking the wind speed as a horizontal coordinate according to the DFIG parameters to obtain the active output range of the DFIG;
step 3), the grid-side converter considers two factors of the capacity limit of the grid-side converter and the maximum operating current of the grid-side converter, and the stator considers three factors of the capacity of the rotor-side converter, the operating current of the rotor-side converter and the DFIG capacity to respectively deduce the reactive output range of the rotor-side converter;
and 4), calculating the reactive output range of the DFIG under the full working condition by combining the factors considered by the two parts of reactive components according to the running condition of the DFIG under the full working condition.
Further, the operating region of the DFIG includes CpConstant area, constant rotating speed area and constant power area, the lowest wind speed is cut-in wind speed, the highest wind speed is cut-out wind speed, and the wind speed is determined according to the conditions
Figure BDA0002338941500000021
Obtaining the active output range of the DFIG under all working conditions, wherein rho is 1.225kg/m3Air density, R is the wind turbine impeller radius, S is the cross-sectional area of the blade, vwIs the wind speed, CpIs the coefficient of wind energy utilization, PtFor mechanical power of wind turbines, PoFor wind turbine output power, Pt＝Po。
Further, the lower limit of the reactive output range of the grid-side converter is determined by the capacity of the grid-side converter, the upper limit is determined by the capacity of the converter when operating near the active output limit, and the maximum operating current is determined under the rest of the operating conditions.
Further, the upper limit of the stator reactive output range is determined by the DFIG capacity, the lower limit thereof is determined by the rotor-side converter capacity when the rotation speed is low, and the DFIG capacity when the rotation speed is high.
Further, the reactive output range of the grid-side converter is Ag＝O1∩O2，
O1＝{(-∞,Qg11)∪(Qg12,+∞)}∩(Qg21,Qg22)
O2Comprises the following steps:
Figure BDA0002338941500000022
wherein, UsIs the grid voltage vector magnitude, LgFor filtering equivalent inductance, omega, of a grid-side convertersFor stator winding voltage-current angular frequency, SgNFor the rated capacity of the grid-side converter,
Figure BDA0002338941500000023
Figure BDA0002338941500000031
further, the exchange reactive power range of the DFIG stator and the power grid is As＝O3∩O4∩O5，
O3Comprises the following steps: o is3＝{(-∞,Qs21)∪(Qs22,+∞)}∩(Qs11,Qs12)
Figure BDA0002338941500000032
Figure BDA0002338941500000033
O4Comprises the following steps:
Figure BDA0002338941500000034
O5comprises the following steps:
Figure BDA0002338941500000035
wherein L ismFor exciting the inductance, SNIs the DFIG capacity, IrmaxThe maximum current is run for the rotor-side converter.
Further, the reactive output range of the DFIG under the full working condition is Ag+As。
Compared with the prior art, the invention has the following advantages:
1. the method considers the influence of the network side filter inductance on the reactive power output range, is more suitable for the influence of the filter inductance when the wind turbine generator outputs the reactive power, and accurately calculates the reactive power output range of the wind turbine generator.
2. The invention provides a reactive power output range calculation model based on the full operating condition of a wind turbine generator, so that different influence factors can be considered according to different operating conditions of the wind turbine generator, the reactive power output range can be accurately calculated, the reactive power output range of the whole wind power plant or a distributed wind turbine generator can be accurately calculated, and a basis can be provided for reasonably configuring reactive power compensation equipment of the wind power plant, and reasonably adjusting the voltage of a reactive power participation system of the wind turbine generator and reasonably scheduling.
Drawings
FIG. 1 is a schematic structural diagram of a single doubly-fed wind turbine generator system;
FIG. 2 is a schematic diagram of a current transformer circuit configuration;
FIG. 3 is a schematic diagram of the DFIG operating region and active power output range;
fig. 4 is a reactive output range of the grid-side converter;
FIG. 5 is a graph comparing the results of calculating the net side reactive output range using the method of the present invention and the prior art method;
FIG. 6 is a stator side reactive output range;
fig. 7 is a comparison graph of the results of calculating the stator side reactive output range using the method of the present invention and the prior art method.
Detailed Description
The embodiments are described in detail below with reference to the accompanying drawings.
The method is based on a dynamic model of the doubly-fed wind generating set under the grid voltage orientation, the reactive loss of a filter inductor of a grid-side converter is considered, two factors of the capacity limit and the maximum operating current of the grid-side converter are considered in the reactive output range of the grid-side converter, the influence of three factors of the capacity of a rotor-side converter, the operating current of the rotor-side converter and the DFIG capacity is considered in the reactive output range of a stator, and the reactive output range of the doubly-fed wind generating set under the full-working-condition operation condition is accurately calculated.
TABLE 1 calculation of parameters
Figure BDA0002338941500000051
The specific parameters of the single doubly-fed wind generating set shown in fig. 1 are shown in table 1, the current transformer model is shown in fig. 2 by a mathematical model under the existing dq coordinate system by adopting a motor convention, and the current transformer is oriented by the grid voltage, namely ugd＝Us、ugqWhen the voltage on the ac side of the available grid-side converter is 0
Figure BDA0002338941500000052
Grid-side power, i.e. the power flowing into the grid is
Figure BDA0002338941500000061
AC side power, i.e. output power of grid side converter, is
Figure BDA0002338941500000062
Wherein, UsAs the grid voltage vector magnitude, ugd、ugqThe components of d and q axes of the grid voltage are obtained; v. ofgd、vgqThe components of the alternating-current side voltage d and q axis of the grid-side converter are obtained; i.e. igd、igqFor the current flowing into the d, q-axis components of the grid-side converter, Rg、LgThe equivalent resistance and the inductance of the filtering of the grid-side converter are disclosed.
The related expressions of the rotor-side converter are obtained in the same way, and the rotor voltage of the rotor-side converter is
Figure BDA0002338941500000063
Stator output power of
Figure BDA0002338941500000064
Rotor output power of
Figure BDA0002338941500000065
Wherein u issd、usq、urd、urqFor d, q-axis components of stator and rotor voltages, ird、irqIs the d, q axis component of the rotor current, Rs、RrIs stator and rotor winding resistance, Ls、Lr、LmStator, rotor, excitation inductance, omegasFor stator winding voltage current angular frequency, omegarIs the rotor winding voltage current angular frequency.
The output limit of the doubly-fed wind generator is researched, firstly, the operation area of the doubly-fed wind generator system is divided, and different operation areas correspond to different operation states. The operation area can be divided into three parts according to the operation state of the system under different wind speeds and rotating speeds: cpConstant zone, constant speed zone, constant power zone, with the lowest wind speed being the cut-in wind speed and the highest wind speed being the cut-out wind speed, as shown in FIG. 3, based on
Figure BDA0002338941500000071
The active output range of the DFIG under all working conditions can be obtained. Wherein rho is 1.225kg/m3R is the radius of the impeller of the wind turbine. S is the cross-sectional area of the blade, vwIs the wind speed, CpIs the coefficient of wind energy utilization, PtFor mechanical power of wind turbines, PoFor wind turbine output power, neglecting active and mechanical losses, Pt＝Po。
The reactive output range of the grid-side converter mainly considers two factors of the capacity limit and the maximum running current of the grid-side converter.
Limitation ① that the grid-side converter does not exceed its rated capacity is
Figure BDA0002338941500000072
Formula (1) is substituted for formula (3) to obtain
Figure BDA0002338941500000073
Neglecting the first derivative of equation (8) yields equation (9), where equation (9) represents the power loss of the filter resistor and inductor in the circuit structure.
Figure BDA0002338941500000074
Since the filter resistance is generally small, active loss, P, is ignoredg′＝PgIn the vertical direction (2), (7) and (9) and because
Figure BDA0002338941500000075
To obtain
Figure BDA0002338941500000076
In the formula (I), the compound is shown in the specification,
Figure BDA0002338941500000081
solving the inequality of a one-dimensional quadratic equation to obtain:
Figure BDA0002338941500000082
at the moment, the reactive power exchange range between the grid-side converter and the power grid is O1(where the above expression is real), when an imaginary solution exists for equation (10), the corresponding constraint is not considered.
O1＝{(-∞,Qg11)∪(Qg12,+∞)}∩(Qg21,Qg22) (12)
Wherein S isgNFor the rated capacity of the grid-side converter,
Figure BDA0002338941500000083
is the AC side current vector of the grid side converter.
Limit ② considering the maximum current of the GSC (typically 1.2 times the rated current) is
Figure BDA0002338941500000084
Wherein, IgmaxThe maximum operation current of the grid-side converter.
Formula (2) brings formula (13) to
Figure BDA0002338941500000085
Is marked as O2In conclusion, the reactive output range of the network-side converter is Ag＝O1∩O2As shown in fig. 4. The comparison with the upper and lower limits of the existing calculation method is shown in fig. 5. As can be seen from fig. 5, the lower limit of the reactive output range of the grid-side converter is determined by the capacity of the grid-side converter, the upper limit is determined by the capacity of the converter when the grid-side converter is operated near the active output limit, and the maximum operating current is determined under the rest operating conditions, because the upper and lower limit values are higher than the range derived by the existing calculation method due to the grid-side filter inductance.
The DFIG stator reactive power is limited by the rotor-side converter capacity, the rotor-side converter operating current, and the DFIG capacity.
Limit ① rotor side converter Capacity Limit
Figure BDA0002338941500000091
Formula (4) is substituted for formula (6), and because of ωs＝ωrS, can be obtained
Figure BDA0002338941500000092
Neglecting the first derivative of equation (16) to obtain
Figure BDA0002338941500000093
Wherein the content of the first and second substances,
Figure BDA0002338941500000094
is the AC side current vector of the rotor side converter.
Neglecting active losses, i.e. Pr＝-sPsAre connected vertically (5), (15) and (17), and
Figure BDA0002338941500000095
to obtain
Figure BDA0002338941500000096
In the formula (I), the compound is shown in the specification,
Figure BDA0002338941500000097
can be solved to obtain:
Figure BDA0002338941500000101
when the above formulas are real numbers, the reactive power range O of the stator can be obtained3When the imaginary solution of equation (18) exists, it represents that the corresponding limitation is not considered.
O3＝{(-∞,Qs21)∪(Qs22,+∞)}∩(Qs11,Qs12) (20)
Limit ② rotor-side converter operating current limit (typically 1.2 times rated current), to get
Figure BDA0002338941500000102
Formula (5) is substituted for formula (21) to obtain
Figure BDA0002338941500000103
The stator reactive output range obtained by the arrangement is represented as the formula (23) and is marked as O4。
Figure BDA0002338941500000104
Limiting ③ DFIG Capacity SNIs represented by the formula (24) and is represented by O5。
Figure BDA0002338941500000105
Therefore, the exchange reactive power range of the DFIG stator and the power grid is As＝O3∩O4∩O5Referring to fig. 7, it can be seen from fig. 7 that the stator reactive output range is determined by the rotor-side converter capacity and the DFIG capacity together, wherein the upper limit of the output range is determined by the DFIG capacity, the lower limit is determined by the rotor-side converter capacity at lower speeds, and the DFIG capacity at higher speeds, and the precise calculation method proposed by the present invention is more precise than the prior art under full operating conditions.
In conclusion, the reactive output range of the DFIG is as follows: a. theg+As。
The reactive power output range of the doubly-fed wind turbine generator under the specific operation condition can be obtained through the analysis. The output range is calculated, taking the wind speed of 11m/s as an example. At the moment, the slip ratio is-0.2, and the maximum wind energy is tracked and controlled according to Ag、AsExpression is given as Qgmax＝0.6360Mvar，Qgmin＝-0.4239Mvar，Qsmax＝1.1206Mvar，Qsmin-1.1206 Mvar. Namely, the reactive output range of the doubly-fed wind turbine generator is [ -1.5445, 1.7566 ] at the moment]Mvar。
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. A method for accurately calculating the reactive output range of a doubly-fed wind generating set comprises the following steps:
step 1), establishing a mathematical model of the DFIG under a dq coordinate system, and respectively deducing corresponding expressions under a grid-side converter and a rotor-side converter of the DFIG in a grid voltage orientation mode;
step 2), dividing the operation area of the DFIG by taking the wind speed as a horizontal coordinate according to the DFIG parameters to obtain the active output range of the DFIG;
step 3), the grid-side converter considers two factors of the capacity limit of the grid-side converter and the maximum operating current of the grid-side converter, and the stator considers three factors of the capacity of the rotor-side converter, the operating current of the rotor-side converter and the DFIG capacity to respectively deduce the reactive output range of the rotor-side converter;
and 4), calculating the reactive output range of the DFIG under the full working condition by combining the factors considered by the two parts of reactive components according to the running condition of the DFIG under the full working condition.
2. The method for accurately calculating the reactive output range of the doubly-fed wind turbine generator set according to claim 1, wherein in the step 2), the operation region of the DFIG comprises CpConstant area, constant rotating speed area and constant power area, the lowest wind speed is cut-in wind speed, the highest wind speed is cut-out wind speed, and the wind speed is determined according to the conditions
Figure RE-FDA0002369904420000011
Obtaining the active output range of the DFIG under all working conditions, wherein rho is 1.225kg/m3Air density, R is the wind turbine impeller radius, S is the cross-sectional area of the blade, vwIs the wind speed, CpIs the coefficient of wind energy utilization, PtFor mechanical power of wind turbines, PoFor wind turbine output power, Pt＝Po。
3. The method for accurately calculating the reactive output range of the doubly-fed wind turbine generator set as claimed in claim 1, wherein the lower limit of the reactive output range of the grid-side converter is determined by the capacity of the grid-side converter, the upper limit is determined by the capacity of the converter when the doubly-fed wind turbine generator set is operated near the active output limit, and the maximum operating current is determined under the rest operating conditions.
4. The method for accurately calculating the reactive output range of the doubly-fed wind turbine generator set according to claim 1, wherein the upper limit of the reactive output range of the stator is determined by the capacity of the DFIG, the lower limit of the reactive output range is determined by the capacity of the rotor-side converter when the rotating speed is low, and the lower limit of the reactive output range is determined by the capacity of the DFIG when the rotating speed is high.
5. The method for accurately calculating the reactive output range of the doubly-fed wind generating set according to claim 2, wherein the reactive output range of the grid-side converter is Ag＝O1∩O2，
O1＝{(-∞,Qg11)∪(Qg12,+∞)}∩(Qg21,Qg22)
O2Comprises the following steps:
Figure RE-FDA0002369904420000021
wherein, UsIs the grid voltage vector magnitude, LgFor filtering equivalent inductance, omega, of a grid-side convertersFor stator winding voltage-current angular frequency, SgNFor the rated capacity of the grid-side converter,
Figure RE-FDA0002369904420000022
Figure RE-FDA0002369904420000023
6. the method for accurately calculating the reactive output range of the doubly-fed wind turbine generator system according to claim 5, wherein the reactive output range of the DFIG stator exchanged with a power grid is As＝O3∩O4∩O5，
O3Comprises the following steps: o is3＝{(-∞,Qs21)∪(Qs22,+∞)}∩(Qs11,Qs12)
Figure RE-FDA0002369904420000031
Figure RE-FDA0002369904420000032
O4Comprises the following steps:
Figure RE-FDA0002369904420000033
O5comprises the following steps:
Figure RE-FDA0002369904420000034
wherein L ismFor exciting the inductance, SNIs the DFIG capacity, IrmaxThe maximum current is run for the rotor-side converter.
7. The method for accurately calculating the reactive output range of the doubly-fed wind turbine generator system according to claim 6, wherein the reactive output range of the DFIG under all working conditions is Ag+As。
CN201911367995.4A 2019-12-26 2019-12-26 Accurate calculation method for reactive power output range of doubly-fed wind generator set Active CN110970941B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911367995.4A CN110970941B (en) 2019-12-26 2019-12-26 Accurate calculation method for reactive power output range of doubly-fed wind generator set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911367995.4A CN110970941B (en) 2019-12-26 2019-12-26 Accurate calculation method for reactive power output range of doubly-fed wind generator set

Publications (2)

Publication Number Publication Date
CN110970941A true CN110970941A (en) 2020-04-07
CN110970941B CN110970941B (en) 2024-03-01

Family

ID=70036683

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911367995.4A Active CN110970941B (en) 2019-12-26 2019-12-26 Accurate calculation method for reactive power output range of doubly-fed wind generator set

Country Status (1)

Country Link
CN (1) CN110970941B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116404705A (en) * 2023-02-28 2023-07-07 山东大学 Reactive current optimal distribution method and system for doubly-fed fan stator and grid-side converter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011135706A (en) * 2009-12-25 2011-07-07 Hitachi Ltd Wind power generation system and control method thereof
CN103490423A (en) * 2013-07-04 2014-01-01 清华大学 Wind-farm reactive instruction distribution method
CN103545820A (en) * 2013-09-24 2014-01-29 南车株洲电力机车研究所有限公司 Method for improving reliability of power device of doubly-fed wind-electricity converter
EP3484008A1 (en) * 2017-11-13 2019-05-15 General Electric Company Dynamic conrtol of active and reactive power capability for wind farms

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011135706A (en) * 2009-12-25 2011-07-07 Hitachi Ltd Wind power generation system and control method thereof
CN103490423A (en) * 2013-07-04 2014-01-01 清华大学 Wind-farm reactive instruction distribution method
CN103545820A (en) * 2013-09-24 2014-01-29 南车株洲电力机车研究所有限公司 Method for improving reliability of power device of doubly-fed wind-electricity converter
EP3484008A1 (en) * 2017-11-13 2019-05-15 General Electric Company Dynamic conrtol of active and reactive power capability for wind farms

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
刘其辉等: "双馈式变速恒频风力发电机的无功功率机制及特性研究", 《中国电机工程学报》 *
刘国华等: "基于下垂特性的分散式双馈风电机组无功控制方法", 《风能》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116404705A (en) * 2023-02-28 2023-07-07 山东大学 Reactive current optimal distribution method and system for doubly-fed fan stator and grid-side converter

Also Published As

Publication number Publication date
CN110970941B (en) 2024-03-01

Similar Documents

Publication Publication Date Title
CN110797883B (en) Wind power plant flexible direct grid-connected system subsynchronous oscillation suppression method based on impedance method
CN108270241B (en) Control method of virtual synchronous generator of fan grid-connected inverter
CN101272119B (en) Method for restraining imbalance and deformation of double-feedback type wind generator set stator current
CN104362668B (en) The control method of double-fed wind power generator during a kind of Voltage unbalance/harmonic distortion
CN101895118B (en) Method for suppressing harmonics of power network current of variable-speed constant-frequency doubly-fed wind power generator system
CN112448398B (en) Stator side analog resistance-based doubly-fed wind power plant subsynchronous oscillation suppression method
CN110048457A (en) A kind of double-fed blower virtual synchronous control method having low voltage ride-through function
CN115313419B (en) Direct-drive wind power system control method and system based on network-building type converter
CN113346513B (en) Method for identifying forced subsynchronous oscillation of direct-drive fan
CN107482678A (en) A kind of double-fed fan motor field is through soft direct join net system failure traversing control method
CN105429166A (en) PMSG low-voltage ride through system based on reactive power control
CN106294959B (en) The modeling and simulating method that model reference self-adapting control is combined with double-fed blower reduced-order model
Trilla et al. Control of SCIG wind farm using a single VSC
CN111697595A (en) Frequency dynamic optimization control method and system of virtual synchronous fan
CN105305499A (en) Parameter-adjustable real time monitoring method for small-power wind power converter
CN111049178A (en) Method for analyzing stability control of direct-drive permanent magnet wind turbine generator through VSC-HVDC grid connection
CN102496938B (en) Method and device for determining reactive regulation capacity in operation process of wind generation set
CN109066735A (en) Dual feedback wind power generation system and its control method under a kind of unbalanced electric grid voltage
CN110970941B (en) Accurate calculation method for reactive power output range of doubly-fed wind generator set
CN104795842B (en) Symmetrical fault ride-through control method for hybrid wind farm group containing double-fed wind farm and permanent magnetic direct drive wind farm
CN110417047B (en) Method for analyzing SSCI damping characteristics of doubly-fed fan based on complex torque coefficient
CN102522942B (en) Excitation control method of doubly-fed wind-driven generator
CN103259269B (en) Wind power plant reactive power optimization configuration method based on double-fed induction fan reactive power generating capacity
Årdal et al. Parametric sensitivity of transients in an islanded system with an offshore wind farm connected to an oil platform
CN112886611B (en) Subsynchronous oscillation suppression method for direct-drive fan grid-connected system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant