CN111313434A - Self-adaptive resonance coefficient control method, subsynchronous suppression method and device and converter controller - Google Patents
Self-adaptive resonance coefficient control method, subsynchronous suppression method and device and converter controller Download PDFInfo
- Publication number
- CN111313434A CN111313434A CN202010085480.1A CN202010085480A CN111313434A CN 111313434 A CN111313434 A CN 111313434A CN 202010085480 A CN202010085480 A CN 202010085480A CN 111313434 A CN111313434 A CN 111313434A
- Authority
- CN
- China
- Prior art keywords
- subsynchronous
- subsynchronous oscillation
- resonance
- electric energy
- quasi
- 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
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
- H02J3/24—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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The embodiment of the invention provides a self-adaptive resonance coefficient control method, a sub-synchronous suppression method, a device and a controller of a converter, wherein the method comprises the following steps: acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of a power transmission system; obtaining quasi-resonance compensation parameters of the power transmission system according to the subsynchronous oscillation electric energy; and dynamically adjusting the resonance coefficient of the system according to the quasi-resonance compensation parameter. According to the method provided by the embodiment of the invention, the resonance coefficient of the system can be adaptively adjusted in real time according to the change of the system operation mode or parameters, and the subsynchronous oscillation frequency can be adjusted in real time to follow the change of the system, so that the subsynchronous oscillation suppressor can still better track the power grid frequency without dead time when the subsynchronous oscillation frequency changes, and can output better voltage waveform.
Description
Technical Field
The invention relates to the technical field of power transmission, in particular to a self-adaptive resonance coefficient control method, a subsynchronous oscillation suppression device and a converter.
Background
With the application of centralized and large-scale new energy power generation, such as photovoltaic power generation, wind power generation and the like, especially the application of full-power variable-flow wind generating sets, new power grid problems occur in the grid-connected operation process of large-scale sets in multiple regions, and the main manifestations of these field power grid problems are as follows: the low-order harmonic wave exceeds the standard; frequency out-of-range warning is frequently reported by booster station monitoring equipment due to severe frequency fluctuation; the stroboscopic phenomenon distinguishable by human eyes of the lighting fluorescent lamp in the power plant occurs.
The conventional control method can normally work under the condition that the voltage of the power grid side is normal, but when the number of units is increased, subsynchronous oscillation may occur to cause the voltage fluctuation of the power grid side, and further cause the power fluctuation of the power grid side, and along with the fluctuation, the operation mode or part of parameters of the system can be changed constantly along with the time, so that the subsynchronous resonance frequency of the system can be changed, and if the subsynchronous resonance frequency is calculated according to earlier parameters or unchangeable parameters, the precision of the control system can be seriously influenced. A general quasi-resonant controller can keep better control performance by setting a certain passband frequency, but cannot meet the control precision for a large-disturbance working state. When the frequency has a large deviation from the set value, the gain of the resonance controller will be seriously reduced, so that the sub-synchronous oscillation harmonic wave cannot be tracked without static error.
Disclosure of Invention
The invention aims to regulate and control the resonance coefficient of a power grid and suppress subsynchronous oscillation.
In one aspect, an embodiment of the present invention provides a method for controlling a self-adaptive resonance coefficient, including:
acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of a power transmission system;
obtaining quasi-resonance compensation parameters of the power transmission system according to the subsynchronous oscillation electric energy;
and dynamically adjusting the resonance coefficient of the system according to the quasi-resonance compensation parameter.
In some optional embodiments, obtaining the quasi-resonance compensation parameter of the power transmission system according to the subsynchronous oscillation power comprises:
determining subsynchronous harmonic components according to subsynchronous oscillation electric energy;
and obtaining a quasi-resonance compensation parameter according to the difference value of the subsynchronous oscillation electric energy and the subsynchronous harmonic component.
In some optional embodiments, determining the subsynchronous harmonic component from the subsynchronous oscillation power comprises:
calculating the subsynchronous harmonic component by the following formula;
in the formula, vinV being sub-synchronous oscillating electric energyoutAnd M is a system resonance coefficient, H is a first gain coefficient, and K is a second gain coefficient.
In some optional embodiments, obtaining the quasi-resonance compensation parameter according to the difference between the subsynchronous oscillation electric energy and the subsynchronous harmonic component comprises:
and (4) passing the difference value through a fixed threshold range, and calculating according to a PI function to obtain a quasi-resonance compensation parameter.
On the other hand, the embodiment of the invention also provides a subsynchronous oscillation suppression method for controlling the converter, which comprises the following steps:
acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of a power transmission system;
dynamically adjusting the system resonance coefficient of the power transmission system according to the subsynchronous oscillation electric energy and the self-adaptive resonance coefficient control method;
determining and adjusting subsynchronous harmonic components according to subsynchronous oscillation electric energy and a system resonance coefficient;
and controlling the converter to suppress the subsynchronous oscillation according to the subsynchronous harmonic component.
On the other hand, an embodiment of the present invention further provides a subsynchronous oscillation suppression apparatus, which is used for controlling a converter, and includes:
the acquisition module is used for acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of the power transmission system;
the resonance coefficient control module is used for dynamically adjusting the system resonance coefficient of the power transmission system according to the subsynchronous oscillation electric energy;
the harmonic component control module is used for determining and adjusting subsynchronous harmonic components according to the subsynchronous oscillation electric energy and the system resonance coefficient;
and the feedback control module is used for controlling the converter to suppress the subsynchronous oscillation according to the subsynchronous harmonic component.
In some optional embodiments, the resonance coefficient control module comprises:
the compensation coefficient generation module is used for obtaining a quasi-resonance compensation parameter of the power transmission system according to the subsynchronous oscillation electric energy;
and the feedback adjusting module is used for dynamically adjusting the system resonance coefficient according to the quasi-resonance compensation parameter.
In some optional embodiments, the compensation parameter generation module comprises:
a difference value calculation unit: the device is used for calculating the difference value of subsynchronous oscillation electric energy and subsynchronous harmonic components;
a compensation parameter calculation unit: for determining a quasi-resonance compensation parameter based on the difference.
In some optional embodiments, the compensation parameter calculation unit includes:
a threshold limiting unit: for defining a difference output range;
a PI function calculation unit: for calculating quasi-resonance compensation parameters.
On the other hand, the embodiment of the invention also provides a controller of the converter, wherein the subsynchronous oscillation suppression device is arranged, and the converter is a converter of a wind generating set.
The technical scheme has the following beneficial effects: the resonance coefficient of the system can be adaptively adjusted in real time according to the change of the system running mode or parameters, the subsynchronous oscillation frequency can be adjusted in real time and can follow the change of the system, and therefore the subsynchronous oscillation suppressor can still better track the power grid frequency without dead time when the subsynchronous oscillation frequency changes, and better voltage waveform is output.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating an adaptive resonance coefficient control method according to one embodiment of the present invention;
FIG. 2 is a schematic control block diagram illustrating an adaptive resonance coefficient control method according to one embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a subsynchronous oscillation suppression method according to one embodiment of the invention;
FIG. 4 is a schematic diagram showing a grid-connected structure of a double-fed wind power system in the prior art;
FIG. 5 is a block diagram illustrating converter control in a subsynchronous oscillation suppression method according to one embodiment of the invention;
FIG. 6 is a schematic block diagram illustrating a prior art quasi-resonant controller;
FIG. 7 is a simulation graph showing the three-phase current suppression effect of a quasi-resonant controller when the harmonic frequency of the subsynchronous oscillation of the prior art changes;
FIG. 8 is a simulation graph showing the single-phase current suppression effect of a quasi-resonant controller when the harmonic frequency of the subsynchronous oscillation of the prior art changes;
FIG. 9 is a simulation diagram showing the three-phase current suppression effect of the adaptive quasi-resonant controller when the frequency of the subsynchronous oscillation harmonic varies in the subsynchronous oscillation suppression method according to one embodiment of the invention;
FIG. 10 is a simulation diagram showing the suppression effect of the single-phase current of the adaptive quasi-resonant controller when the frequency of the subsynchronous oscillation harmonic varies in the subsynchronous oscillation suppression method according to one embodiment of the invention;
fig. 11 is a schematic structural diagram showing a subsynchronous oscillation suppression apparatus according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram showing a subsynchronous oscillation suppression apparatus according to still another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For better understanding of the present invention, an adaptive resonance coefficient control method, a sub-synchronous suppression method, an apparatus and a controller of a converter according to an embodiment of the present invention are described in detail below with reference to fig. 1 to 12. It should be noted that these examples are not intended to limit the scope of the present disclosure.
Fig. 1 is a schematic diagram illustrating an adaptive resonance coefficient control method according to an embodiment of the present invention. The adaptive resonance coefficient control method 100 according to the embodiment of the present invention includes steps 110 to 130.
And step 110, acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of the power transmission system. Specifically, the subsynchronous oscillation electric energy may be a subsynchronous harmonic current or a subsynchronous harmonic voltage.
And step 120, obtaining quasi-resonance compensation parameters of the power transmission system according to the subsynchronous oscillation electric energy.
In one embodiment, step 120 may specifically include:
1) determining subsynchronous harmonic components according to subsynchronous oscillation electric energy;
specifically, the calculation formula of the subsynchronous harmonic component is:
in the formula, vinV being sub-synchronous oscillating electric energyoutAnd M is a system resonance coefficient, H is a first gain coefficient, and K is a second gain coefficient.
2) According to the difference η between the subsynchronous oscillation power and the subsynchronous harmonic componentνAnd obtaining a quasi-resonance compensation parameter.
And step 130, dynamically adjusting a system resonance coefficient according to the quasi-resonance compensation parameter.
Specifically, η at that timeνWhen the frequency is more than 0, the system resonance coefficient M is increased, and the resonance frequency omega of the resonance controller0MH increases with increasing system resonance coefficient M, when ηνWhen the frequency is less than 0, the system resonance coefficient M is reduced, and the resonance frequency omega of the resonance controller is reduced0MH decreases as the system resonance coefficient M decreases.
In an embodiment, step 120 may further include:
3) will be the difference ηνAnd (5) when the parameter is more than 0, passing through a fixed threshold range, and calculating according to a PI function to obtain a quasi-resonance compensation parameter.
Specifically, the difference η between the subsynchronous oscillation power and the subsynchronous harmonic componentνCan be limited within a fixed range delta by upper and lower thresholds, the value of delta is generally a fixed value and can be determined according to specific error requirements, as shown in FIG. 2, a schematic control block diagram of the adaptive resonance coefficient control method is shown, in order to meet the difference ηνRange requirement, difference ηνShould not be too large, the difference value η may be set to vary within the inter-cell deltaνThe signal is used as a feedback quantity method, and a PI regulator is used for dynamically regulating a system resonance coefficient M, so that the requirement of frequency self-adaption is met.
Fig. 3 shows a schematic diagram of a subsynchronous oscillation suppression method according to an embodiment of the invention.
The subsynchronous oscillation suppression method 200 in the embodiment of the present invention includes steps 210 to 240.
And step 210, acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of the power transmission system. In particular, the subsynchronous oscillating electrical energy may be a subsynchronous harmonic current and/or a subsynchronous harmonic voltage.
And step 240, controlling the converter to suppress subsynchronous oscillation according to the subsynchronous harmonic component.
If the power grid contains subsynchronous harmonic current, the output power of the power generation system fluctuates, so that the current instruction reference value output by the voltage outer ring PI regulator contains corresponding subsynchronous harmonic component, and the PI regulator regulates the current inner ring, so that the output voltage of the rotor side contains the subsynchronous harmonic component. The subsynchronous harmonic component of the output voltage at the rotor side further induces a corresponding subsynchronous harmonic current, and the stator harmonic current is further amplified by the stator-to-rotor coupling. It is due to this positive feedback effect that the system will oscillate subsynchronously.
In an embodiment, as shown in fig. 4 and 5, for the power transmission system, the power transmission system may be a wind power generation system, and the power electronic device connected to the generator set generally adopts magnetic field directional control based on a virtual flux linkage to implement torque and flux weakening decoupling control on the generator side, and adopts grid voltage directional control to implement active and reactive decoupling control on the grid side.
In order to suppress the subsynchronous oscillation of the wind turbine generator system, it is necessary to suppress the subsynchronous harmonic current on the stator side so that it is not amplified or even reduced. Therefore, by adding the subsynchronous harmonic current suppression ring using the subsynchronous oscillation suppression method to the rotor-side converter, the rotor can output corresponding voltage to eliminate the subsynchronous harmonic component action of the stator current.
In one embodiment, the subsynchronous oscillation electrical energy may be a difference between a given value of the stator-side subsynchronous harmonic current and an actual value of the stator-side subsynchronous harmonic current. The subsynchronous harmonic component may be a subsynchronous harmonic voltage of the corresponding output of the rotor side.
Specifically, the calculation formula of the subsynchronous harmonic voltage on the rotor side is as follows:
in the formula (I), the compound is shown in the specification,
respectively are given values of d-axis components and q-axis components of the sub-synchronous harmonic voltage at the rotor side,
respectively setting values i of sub-synchronous harmonic current d and q axis components at stator sidesd、isqActual values of d-axis component and q-axis component, K, generated by sub-synchronous current harmonic waves at stator sideRIs the system gain factor, ωcIn order to cut-off the frequency of the frequency,
is a sub-synchronous resonance frequency, wherein
Corresponding to step 120 in method 100, the following results are obtained:
according to the method 100, the system resonance coefficient M is adjusted, and the subsynchronous resonance frequency can be correspondingly adjusted
And carrying out self-adaptive adjustment.
Fig. 6 shows a schematic control block diagram of a quasi-resonant controller in the prior art, and fig. 7 and 8 show simulation graphs of three-phase current and single-phase suppression effect of the quasi-resonant controller when the sub-synchronous oscillation harmonic frequency changes in the prior art, wherein the sub-synchronous harmonic frequency is 12 Hz. When the harmonic frequency of the subsynchronous oscillation changes, the control performance is greatly influenced because the resonance frequency of the quasi-resonance controller cannot be dynamically adjusted. When the given resonant frequency is fixed, the output signal leads the input signal if the frequency of the input signal is less than the given resonant frequency. Conversely, if the frequency of the input signal is greater than the resonant frequency, the output signal lags the input signal. Only when the frequency of the input signal is equal to the resonant frequency, the output signal can completely track the input signal, and the same frequency and same phase output can be achieved. As can be seen from fig. 7 and 8, the effect of the resonance controller is reduced when the sub-synchronous oscillation harmonic frequency is changed. After the addition of the quasi-resonant control loop, the current ripple is reduced, but the effect is far from satisfactory. It can be seen that when the subsynchronous harmonics change, the frequency adaptability of the quasi-resonant controller is poor, and improvement is still needed.
Fig. 9 and 10 are simulation diagrams illustrating three-phase and single-phase current suppression effects of the adaptive quasi-resonant controller when the sub-synchronous oscillation harmonic frequency changes in the sub-synchronous oscillation suppression method according to an embodiment of the invention, wherein the sub-synchronous harmonic frequency is 12 Hz. As can be seen from fig. 9 and 10, after the adaptive quasi-resonant controller adopting the adaptive resonance coefficient control method and the sub-synchronous oscillation suppression method according to the embodiment of the present invention replaces the quasi-resonant controller in the prior art, the suppression effect of the converter on the variation of the sub-synchronous oscillation harmonic frequency is more obvious. The three-phase current has improved sine degree and reduced waveform distortion compared with that before replacement. Therefore, the subsynchronous oscillation suppression method provided by the invention is effective in suppressing subsynchronous oscillation, has better frequency adaptability and is more suitable for actual operation conditions.
Fig. 11 shows a schematic structural diagram of a subsynchronous oscillation suppression device according to an embodiment of the present invention. In one embodiment, the reference power curve generating apparatus 300 of the wind turbine generator set may include:
an obtaining module 310, configured to obtain sub-synchronous oscillation electric energy generated by sub-synchronous oscillation of a power transmission system;
the resonance coefficient control module 320 is configured to dynamically adjust a system resonance coefficient of the power transmission system according to the subsynchronous oscillation electric energy;
the harmonic component control module 330 is configured to determine and adjust a sub-synchronous harmonic component according to the sub-synchronous oscillation power and the system resonance coefficient;
and the feedback control module 340 is configured to control the converter to suppress the subsynchronous oscillation according to the subsynchronous harmonic component.
Fig. 12 is a schematic structural diagram of a subsynchronous oscillation suppression apparatus according to still another embodiment of the present invention. In an embodiment, the resonance coefficient control module 320 may further include:
the compensation coefficient generation module 3201 is used for obtaining quasi-resonance compensation parameters of the power transmission system according to the subsynchronous oscillation electric energy;
and the feedback adjusting module 3202 is used for dynamically adjusting the system resonance coefficient according to the quasi-resonance compensation parameter.
In an embodiment, the compensation coefficient generating module 3201 may further include:
a difference value calculation unit: the device is used for calculating the difference value of subsynchronous oscillation electric energy and subsynchronous harmonic components;
a compensation parameter calculation unit: for determining a quasi-resonance compensation parameter based on the difference.
In an embodiment, the compensation parameter calculating unit may further include:
a threshold limiting unit: for defining a difference output range;
a PI function calculation unit: for calculating quasi-resonance compensation parameters.
The embodiment of the invention also provides a controller of the converter, which is provided with the subsynchronous oscillation suppression device, wherein the converter is a converter of a wind generating set. In particular, the converter may be a rotor-side converter of a doubly-fed wind power plant.
According to the adaptive resonance coefficient control method, the subsynchronous suppression method, the device and the converter controller, the resonance coefficient of a system can be adaptively adjusted in real time according to the change of the system operation mode or parameters, the subsynchronous oscillation frequency can be adjusted in real time and follows the change of the system, and therefore the subsynchronous oscillation suppressor can still better track the power grid frequency without dead time difference and output better voltage waveform when the subsynchronous oscillation frequency changes.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the device, the electronic device and the readable storage medium embodiments, since they are substantially similar to the method embodiments, the description is simple, and the relevant points can be referred to the partial description of the method embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. An adaptive resonance coefficient control method, comprising:
acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of a power transmission system;
obtaining quasi-resonance compensation parameters of the power transmission system according to the subsynchronous oscillation electric energy;
and dynamically adjusting the resonance coefficient of the system according to the quasi-resonance compensation parameter.
2. The adaptive resonance coefficient control method according to claim 1, wherein the obtaining the quasi-resonance compensation parameter of the power transmission system according to the subsynchronous oscillation power comprises:
determining subsynchronous harmonic components according to the subsynchronous oscillation electric energy;
and obtaining the quasi-resonance compensation parameter according to the difference value of the subsynchronous oscillation electric energy and the subsynchronous harmonic component.
3. The adaptive resonance coefficient control method according to claim 2, wherein determining a subsynchronous harmonic component from the subsynchronous oscillation power includes:
calculating the subsynchronous harmonic component according to the following formula;
in the formula, vinV being sub-synchronous oscillating electric energyoutAnd M is a system resonance coefficient, H is a first gain coefficient, and K is a second gain coefficient.
4. The adaptive resonance coefficient control method according to claim 2, wherein the obtaining the quasi-resonance compensation parameter according to the difference between the subsynchronous oscillation electric energy and the subsynchronous harmonic component comprises:
and passing the difference value through a fixed threshold range, and calculating according to a PI function to obtain the quasi-resonance compensation parameter.
5. A subsynchronous oscillation suppression method is used for controlling a converter and is characterized by comprising the following steps:
acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of a power transmission system;
dynamically adjusting a system resonance coefficient of the power transmission system according to the subsynchronous oscillation power and the adaptive resonance coefficient control method of claims 1-4;
determining and adjusting subsynchronous harmonic components according to the subsynchronous oscillation electric energy and the system resonance coefficient;
and controlling the converter to suppress the subsynchronous oscillation according to the subsynchronous harmonic component.
6. A subsynchronous oscillation suppression device for controlling a converter, comprising:
the acquisition module is used for acquiring subsynchronous oscillation electric energy generated by subsynchronous oscillation of the power transmission system;
the resonance coefficient control module is used for dynamically adjusting the system resonance coefficient of the power transmission system according to the subsynchronous oscillation electric energy;
the harmonic component control module is used for determining and adjusting subsynchronous harmonic components according to the subsynchronous oscillation electric energy and the system resonance coefficient;
and the feedback control module is used for controlling the converter to inhibit the subsynchronous oscillation according to the subsynchronous harmonic component.
7. The subsynchronous oscillation suppression device of claim 6, wherein said resonance coefficient control module comprises:
the compensation coefficient generation module is used for obtaining quasi-resonance compensation parameters of the power transmission system according to the subsynchronous oscillation electric energy;
and the feedback adjusting module is used for dynamically adjusting the system resonance coefficient according to the quasi-resonance compensation parameter.
8. The subsynchronous oscillation suppression device of claim 7, wherein said compensation parameter generation module comprises:
a difference value calculation unit: calculating a difference between the subsynchronous oscillation electric energy and the subsynchronous harmonic component;
a compensation parameter calculation unit: for determining the quasi-resonance compensation parameter according to the difference.
9. The subsynchronous oscillation suppression device according to claim 8, wherein said compensation parameter calculating unit comprises:
a threshold limiting unit: for defining the difference output range;
a PI function calculation unit: for calculating the quasi-resonance compensation parameter.
10. A controller for a converter, characterized in that it is provided with a subsynchronous oscillation suppression device according to any of claims 7 to 9, said converter being a converter of a wind power plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010085480.1A CN111313434B (en) | 2020-02-04 | 2020-02-04 | Resonance coefficient control method, subsynchronous suppression device and controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010085480.1A CN111313434B (en) | 2020-02-04 | 2020-02-04 | Resonance coefficient control method, subsynchronous suppression device and controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111313434A true CN111313434A (en) | 2020-06-19 |
| CN111313434B CN111313434B (en) | 2023-02-28 |
Family
ID=71148339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010085480.1A Active CN111313434B (en) | 2020-02-04 | 2020-02-04 | Resonance coefficient control method, subsynchronous suppression device and controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111313434B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515020A (en) * | 2016-01-19 | 2016-04-20 | 思源清能电气电子有限公司 | Sub-synchronous oscillation suppression control method and system based on SVG |
| CN106786673A (en) * | 2017-02-07 | 2017-05-31 | 华北电力科学研究院有限责任公司 | The suppressing method and device of double-fed blower fan compensated transmission system subsynchronous resonance |
| EP3316435A1 (en) * | 2016-10-25 | 2018-05-02 | Fuji Electric Co., Ltd. | Resonance suppression device |
| CN108631331A (en) * | 2018-04-24 | 2018-10-09 | 华北电力科学研究院有限责任公司 | A kind of double-fed fan motor field sub-synchronous oscillation suppression method and device |
| CN109995052A (en) * | 2017-12-29 | 2019-07-09 | 北京金风科创风电设备有限公司 | Subsynchronous suppression method and device and controller of converter |
-
2020
- 2020-02-04 CN CN202010085480.1A patent/CN111313434B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515020A (en) * | 2016-01-19 | 2016-04-20 | 思源清能电气电子有限公司 | Sub-synchronous oscillation suppression control method and system based on SVG |
| EP3316435A1 (en) * | 2016-10-25 | 2018-05-02 | Fuji Electric Co., Ltd. | Resonance suppression device |
| CN106786673A (en) * | 2017-02-07 | 2017-05-31 | 华北电力科学研究院有限责任公司 | The suppressing method and device of double-fed blower fan compensated transmission system subsynchronous resonance |
| CN109995052A (en) * | 2017-12-29 | 2019-07-09 | 北京金风科创风电设备有限公司 | Subsynchronous suppression method and device and controller of converter |
| CN108631331A (en) * | 2018-04-24 | 2018-10-09 | 华北电力科学研究院有限责任公司 | A kind of double-fed fan motor field sub-synchronous oscillation suppression method and device |
Non-Patent Citations (2)
| Title |
|---|
| 杨烨等: "双馈风电场的次同步振荡分析与抑制", 《电气开关》 * |
| 胡应宏等: "双馈风机?串补输电系统次同步谐振的附加阻尼控制", 《电网技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111313434B (en) | 2023-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111277001B (en) | Fan grid-connected control method based on virtual synchronous generator parameter adaptive control | |
| CN108631338B (en) | Method for inhibiting grid-connected subsynchronous oscillation of doubly-fed wind power plant | |
| Alawasa et al. | Modeling, analysis, and suppression of the impact of full-scale wind-power converters on subsynchronous damping | |
| EP2594005B1 (en) | Power oscillation damping controller | |
| CA2974872C (en) | Control method for a system comprising a frequency converter connected to a power grid | |
| AU2020455056B2 (en) | Low-voltage ride-through control method and system for wind turbine generator | |
| EP2032846A2 (en) | Power conditioning architecture for a wind turbine | |
| CN110176780B (en) | Low-voltage ride through control method based on virtual self-inductance of compensation armature winding | |
| Binbing et al. | RoCoF droop control of PMSG-based wind turbines for system inertia response rapidly | |
| CN112838589A (en) | Subsynchronous oscillation suppression method for voltage source type doubly-fed wind turbine generator under series compensation power grid | |
| Rabelo et al. | Control of an optimized power flow in wind power plants with doubly-fed induction generators | |
| CN110518600A (en) | A kind of grid-connected active support and control structure of PMSG of the modified multi-machine parallel connection based on VSG | |
| CN109039180B (en) | Fractional order control method for grid connection process of doubly-fed induction generator | |
| CN113517696A (en) | Harmonic elimination equipment of island mode open winding double-fed wind power generation micro-grid system | |
| CN116826779A (en) | Subsynchronous oscillation suppression method of soft direct grid-connected system based on active disturbance rejection control | |
| CN111313434B (en) | Resonance coefficient control method, subsynchronous suppression device and controller | |
| Hamid et al. | Higher order optimization based control of grid-tied DFIG wind energy conversion system | |
| CN116073398A (en) | Additional damping control system for improving synchronous stability of doubly-fed wind turbine generator | |
| CN115459300A (en) | Doubly-fed wind power plant subsynchronous oscillation suppression method based on linear active disturbance rejection control | |
| CN110417025B (en) | Distributed fan voltage fluctuation stabilizing control method | |
| CN110943484B (en) | Double-fed fan based on unified power quality regulator and application method thereof | |
| Song et al. | Resonance active damping and PCC voltage quality improvement of DFIG system connected to parallel compensated grid | |
| Jun et al. | An improved control strategy for double feed induction generator in low frequency resonant power grid | |
| Ngom et al. | An Adaptive DC-link Voltage Control for Doubly Fed Induction Generator Wind Turbine System | |
| CN109888831A (en) | A kind of control parameter recognition methods based on virtual synchronous generator |
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 |