CN106451496A - Method for rapidly restraining low-frequency oscillation of large-scale wind power generation system grid voltage - Google Patents
Method for rapidly restraining low-frequency oscillation of large-scale wind power generation system grid voltage Download PDFInfo
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- CN106451496A CN106451496A CN201610921623.1A CN201610921623A CN106451496A CN 106451496 A CN106451496 A CN 106451496A CN 201610921623 A CN201610921623 A CN 201610921623A CN 106451496 A CN106451496 A CN 106451496A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H02J3/386—
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- 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
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Abstract
The invention discloses a method for rapidly restraining low-frequency oscillation of large-scale wind power generation system grid voltage. The method includes the steps: detecting and extracting low-frequency oscillation components of the grid voltage; transforming alternating-current low-frequency oscillation components into direct-current components by the aid of a control algorithm; performing closed-loop control for the low-frequency oscillation components of the grid voltage under a direct-current coordinate system to completely restrain low-frequency oscillation of the grid voltage.
Description
Technical field
The present invention relates to a kind of method of quick suppression large-scale wind powered generation syst line voltage low-frequency oscillation, pass through wind-force
In electricity generation system, the control algolithm of reactive power compensator realizes the quick suppression to line voltage low-frequency oscillation.
Background technology
With the development of wind generating technology and being continuously increased of wind-power electricity generation installed capacity, grid-connected in power system
Wind power generating set, fan converter and reactive power compensator get more and more.Wind power generating set, fan converter, idle
Interaction between compensation device and power system also becomes increasingly complex and closely, causes wind farm tie point electricity occur
Net voltage low-frequency oscillation phenomenon, is easily caused wind power generating set off-grid, even causes regional power failure when serious.
The area abundant at wind power resources such as the Xinjiang of China and Hebei at present, wind power generating set installed capacity is bigger is all
Have been found that the phenomenon of line voltage low-frequency oscillation, result in part wind power generating set off-grid, if not to line voltage low frequency
Oscillatory occurences effectively suppresses, and will have a negative impact the development of China's wind generating technology.At present domestic and international expert and
This line voltage low-frequency oscillation that scholar all occurs during to new energy grid-connected power is analyzed and studies, and visits
The effective measures of rope suppression line voltage low-frequency oscillation.
Content of the invention
It is an object of the invention to provide the quick suppressing method of a kind of Large Scale Wind Farm Integration line voltage low-frequency oscillation, the method
By reactive power compensator, detection reactive power compensator and the voltage signal of grid connection point, extract the low of grid voltage amplitude
Frequently oscillating component, is generated the command signal of reactive power compensator output electric current, eventually through idle by PID closed loop control algorithm
Compensation device output electric current effectively suppresses the low-frequency oscillation of line voltage.
For achieving the above object, the present invention realizes by the following technical solutions：
Reactive power compensator is passed through by the quick suppressing method of a kind of large-scale wind powered generation syst line voltage low-frequency oscillation
Reactor or connection transformer are parallel on electrical network, detect tie point mains voltage signal, are examined by low frequency component detection algorithm
Survey line voltage low-frequency oscillation component, make reactive power compensator output and electrical network electricity by line voltage low-frequency oscillation suppression link
Compensation electric current, this usual electric current and tie point electrical network, wind power generating set and the fan converter phase of pressure low-frequency oscillation same frequency
Interaction, the effective line voltage low-frequency oscillation suppressing wind generator system grid connection point.
Described low-frequency oscillation component detection algorithm is：Fundamental frequency ω according to line voltagefWith m-Acetyl chlorophosphonazo frequencies omegah1
And ωh2, calculate the frequencies omega of line voltage low-frequency oscillationl, described low-frequency oscillation frequency isAndApplication line voltage fundamental frequency ωfCarry out PARK conversion, gained line voltage DQ to three-phase power grid voltage
Axle component main component is DC quantity and line voltage low-frequency oscillation frequencies omegalComponent.
Under the DQ rotating coordinate system that above-mentioned detection algorithm obtains, line voltage low-frequency oscillation component remains frequency is ωl's
Of ac, directly uses PID controller to carry out closed-loop control and can there is amplitude and phase deviation, it is impossible to realize low to line voltage
Frequently the complete inhibition of oscillating component.Therefore root mean square is carried out to line voltage DQ axle component and ask for computing, obtain line voltage width
Value signal UmagAnd through with ωlCentered on the band-pass filter of frequency process after i.e. can get pure line voltage width
Value low-frequency oscillation component signal.
Applying frequency ω againlCarry out phase synchronization rotating coordinate transformation i.e. to can get and line voltage low frequency to this signal
DQ axle DC component under the corresponding single-phase rotating coordinate system of oscillating component.
It is ω in described frequencylSynchronous rotating frame under DQ axle respectively line voltage low-frequency oscillation component is carried out
PID closed-loop control, owing to instruction and feedback signal are DC quantity, cause pid control algorithm not have amplitude and phase place is quiet
Difference, it is line voltage low-frequency oscillation frequencies omega that PID closed loop output signal can generate frequency after phase synchronization rotation inverse transformationl
Single phase ac signal, using this single phase ac signal as reactive power compensator output current amplitude low frequency command signal, control
Reactive power compensator equipment processed exports electric current low-frequency fluctuation amplitude, i.e. can realize effectively pressing down to line voltage low-frequency oscillation
System.
The feature to line voltage low-frequency oscillation suppression strategy for the reactive power compensator of the present invention is：Employing above-mentioned electrical network
After voltage low-frequency oscillation suppression method, the reactive current amplitude of reactive power compensator output is no longer stable DC quantity, but
In DC quantity, superposition frequency is ωlLow-frequency ac amount.The reactive-load compensation electric current of the low-frequency fluctuation of reactive power compensator output
Interact with the impedance loop of other equipment and electrical network in electrical network, line voltage can be made to produce new low frequency wave momentum, newly produce
Raw line voltage low-frequency fluctuation component is identical with line voltage original low-frequency oscillation component frequencies and opposite in phase, therefore can
When tie point Network Voltage Stability, it is achieved thereby that the suppression to line voltage low-frequency oscillation.
Described reactive power compensator is the high-voltage chain type SVG of H bridge cascade.
Described reactive power compensator is H bridge cascade chain type SVG with step-down transformer.
Described reactive power compensator is multiple inverter configuration SVG device.
Described reactive power compensator is MMC type high pressure SVG device.
Described reactive power compensator is voltage-dropping type MMC type SVG device.
Described reactive power compensator is devices in series two level SVG device.
Described reactive power compensator is thyristor-type SVG device.
The method, by improving reactive power compensator control algolithm, detects and extracts line voltage low-frequency oscillation component, logical
Cross PID controller and carry out closed-loop control, finally make the suppression electric current of reactive power compensator output amplitude low-frequency fluctuation, it is achieved to electricity
Effective suppression of net voltage low-frequency oscillation, can significantly improve Large Scale Wind Farm Integration Network Voltage Stability.Also include advantages below：
1) fast response time
As high-voltage chain type SVG or STATCOM that reactive power compensator is based on wholly-controled device, system has quickly
Response speed.Its main cause is, can be as required to wholly-controled device based on wholly-controled device reactive power compensator
The on off state of (IGBT, IGCT etc.) arbitrarily controls.And, the switching frequency of device or equivalent switching frequency are often relatively
The on-off times of height, typically each power frequency period can be from several times to tens times.
2) compensation range width
Owing to line voltage low-frequency oscillation component is detected and extracted, and the low-frequency oscillation component of exchange is passed through
Control algolithm converts for DC quantity.Under direct current coordinate system, closed-loop control, Ke Yishi are carried out to line voltage low-frequency oscillation
The now complete inhibition to line voltage low-frequency oscillation.When the compensation capacity of reactive power compensator is limited, it is impossible to during complete inhibition, also
Can not exclusively suppress according to place capacity, there is the wide feature of compensation range.
3) can effectively solve the problem that the Large Scale Wind Farm Integration line voltage low-frequency oscillation of appearance at present, and implementation method letter
Single, it is not necessary to increase extras or have only to carry out existing reactive power compensator simple upgrade, save and take up an area and cost.
Brief description
Fig. 1 is Large Scale Wind Farm Integration line voltage low-frequency oscillation suppression principle schematic.
Fig. 2 is grid voltage amplitude low-frequency oscillation component detection algorithm schematic diagram.
Fig. 3 is grid voltage amplitude low-frequency oscillation component DQ axle DC component detection algorithm schematic diagram.
Fig. 4 is line voltage low-frequency oscillation suppression ring control block diagram.
Line voltage low-frequency oscillation waveform when Fig. 5 is not add low-frequency oscillation Restrainable algorithms.
Fig. 6 is the grid voltage amplitude signal detecting after PARK converts.
Fig. 7 is the grid voltage amplitude low-frequency oscillation component after bandpass filter.
Fig. 8 is the DQ axle DC quantity of grid voltage amplitude low-frequency oscillation after phase synchronization rotating coordinate transformation.
Fig. 9 is the reactive current waveform adding reactive power compensator output after low-frequency oscillation Restrainable algorithms.
Figure 10 is to add grid voltage waveform after low-frequency oscillation Restrainable algorithms.
Detailed description of the invention
Describe the detailed description of the invention of the present invention below in conjunction with the accompanying drawings in detail.
Fig. 1 is power oscillation damping principle schematic, reactive power compensator passes through reactor or connection transformer is in parallel
On the electrical network of wind energy turbine set, by the voltage magnitude low-frequency oscillation component in detection electrical network, due to line voltage low-frequency oscillation
Component is detected and has been extracted, and is converted for DC quantity the low-frequency oscillation component of exchange by control algolithm.At direct current
Under coordinate system, closed-loop control is carried out to line voltage low-frequency oscillation, it is possible to achieve to pressing down completely of line voltage low-frequency oscillation
System.
Due to the fact that and line voltage low-frequency oscillation component is detected and extracted, and the low-frequency oscillation of exchange is divided
Amount is converted for DC quantity by control algolithm.Under direct current coordinate system, closed-loop control is carried out to line voltage low-frequency oscillation,
The complete inhibition to line voltage low-frequency oscillation can be realized.
Fig. 2 is grid voltage amplitude low-frequency oscillation component detection algorithm.First three-phase power grid voltage is carried out such as following formula institute
The PARK conversion shown, obtains line voltage DQ axle component, opens radical sign computing by quadratic sum and obtain grid voltage amplitude signal, its
In contain DC component and low-frequency oscillation component, use bandpass filter i.e. to can detect that grid voltage amplitude low-frequency oscillation divides
Amount signal.
Fig. 3 is grid voltage amplitude low-frequency oscillation component DQ axle DC component detection algorithm, is converted and low by single-phase DQ
Pass filter algorithm can obtain the corresponding direct current signal of grid voltage amplitude low-frequency oscillation component under synchronous rotating frame.
Fig. 4 is line voltage low-frequency oscillation suppression ring control block diagram, first to grid voltage amplitude under rotating coordinate system
Oscillating signal carry out PID closed-loop control, controller output signal synchronized rotation inverse transformation after generate reactive-load compensation dress
Put the referenced reactive current value of low-frequency oscillation Restrainable algorithms, by the exchange referenced reactive current value of low-frequency oscillation Restrainable algorithms output
Superimposed with the direct current referenced reactive current value that reactive power compensator conventional control algorithm generates, ultimately generate reactive power compensator
Referenced reactive current signal.Current regulator joint within reactive power compensator will make reactive power compensator output reactive current
Trace command signal, thus quickly suppress line voltage low-frequency oscillation.
Fig. 5 is to add grid voltage waveform before low-frequency oscillation Restrainable algorithms, it can be seen that have in grid voltage amplitude has very much
Bigger low-frequency oscillation component.
Fig. 6 is the grid voltage amplitude signal detecting after PARK converts, and grid voltage amplitude is in addition to DC component, also
Containing bigger low frequency AC components.For realizing that low-frequency oscillation suppresses, it is necessary to the amplitude and phase place of low-frequency oscillation component is carried out
Detection.
Fig. 7 is the grid voltage amplitude low-frequency oscillation component after bandpass filter, and this low-frequency oscillation component is pure
Low-frequency ac amount.Now can directly carry out closed loop suppression to this oscillating component, but traditional PID controller is to AC compounent
Can there is amplitude and phase error in control, affect the effect that low-frequency oscillation is suppressed by system.
Fig. 8 is the DQ axle DC quantity of grid voltage amplitude low-frequency oscillation after phase synchronization rotating coordinate transformation, phase synchronization
Rotating coordinate transformation can use the algorithm shown in Fig. 3, it is also possible to is first constructed three-phase ac signal by monophasic pulses, afterwards again
PARK conversion is carried out to three-phase ac signal.
Fig. 9 adds the reactive current waveform of reactive power compensator output after low-frequency oscillation Restrainable algorithms, now current waveform
In addition to stable reactive current composition, possibly together with the idle composition of exchange of low-frequency fluctuation, low-frequency fluctuation frequency and the low frequency vibration of electrical network
Swing frequency equal.
Figure 10 is to add grid voltage waveform after low-frequency oscillation Restrainable algorithms, and now the low-frequency oscillation component of line voltage is
Through being completely suppressed.
In real system, due to line voltage low-frequency oscillation be AC network, reactive power compensator, wind power generating set and
The various equipment such as fan converter interacts and influences each other and causes, when conflict, electricity occurs in system each equipment running status
When net voltage starts occur that slight low frequency vibrates, line voltage low-frequency oscillation component just can quickly be carried out by reactive power compensator
Accurately detection and control, thus also can quickly low-frequency oscillation be suppressed, it is to avoid low-frequency oscillation deteriorates, thus ties up
Hold wind farm voltage stabilization.
Claims (1)
1. a quick suppressing method for large-scale wind powered generation syst line voltage low-frequency oscillation, the method is to line voltage low frequency
Oscillating component is detected and has been extracted, and by the low-frequency oscillation component of exchange by control algolithm conversion for DC quantity,
Under direct current coordinate system, closed-loop control is carried out to line voltage low-frequency oscillation, it is achieved to pressing down completely of line voltage low-frequency oscillation
System；
Described low-frequency oscillation component detection algorithm is：According to line voltage fundamental frequency ωfWith m-Acetyl chlorophosphonazo frequencies omegah1And ωh2, meter
Calculate the frequencies omega of line voltage low-frequency oscillationl, described low-frequency oscillation frequency isAnd
Application line voltage fundamental frequency ωfPARK conversion is carried out to three-phase power grid voltage, obtains line voltage DQ axle component, by putting down
Side and open radical sign computing and obtain grid voltage amplitude signal, wherein contains DC component and low-frequency oscillation component, uses band logical
Wave filter i.e. can detect that grid voltage amplitude low-frequency oscillation component signal；Described PARK transformation for mula is as follows：
Line voltage low-frequency oscillation component under the DQ rotating coordinate system that above-mentioned detection algorithm obtains, then carry out root mean square ask for fortune
Calculate, obtain grid voltage amplitude signal UmagAnd through with ωlCentered on frequency band-pass filter process after i.e. available
Pure grid voltage amplitude low-frequency oscillation component signal；
Applying frequency ω againlThis signal is carried out phase synchronization rotating coordinate transformation and LPF low-pass filtering treatment i.e. can get with
DQ axle DC component under the corresponding single-phase rotating coordinate system of line voltage low-frequency oscillation component；
It is ω in described frequencylSynchronous rotating frame under DQ axle respectively PID closed loop is carried out to line voltage low-frequency oscillation component
Control, it is line voltage low-frequency oscillation frequency that PID closed loop output signal can generate frequency after phase synchronization rotation inverse transformation
ωlSingle phase ac signal, using this single phase ac signal as reactive power compensator output current amplitude low frequency command signal,
Control reactive power compensator equipment output electric current low-frequency fluctuation amplitude, i.e. can realize effectively pressing down to line voltage low-frequency oscillation
System.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217335A (en) * | 2018-08-22 | 2019-01-15 | 华中科技大学 | A kind of low-frequency oscillation damping control method of offshore wind farm VSC-HVDC output system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035211A (en) * | 2010-10-26 | 2011-04-27 | 国家电网公司 | Method, device and system for inhibiting low-frequency oscillation of power system |
| CN202206145U (en) * | 2011-06-28 | 2012-04-25 | 辽宁荣信众腾科技有限公司 | Restraining device for low-frequency oscillation of voltage of distribution network |
| CN102780226A (en) * | 2012-08-08 | 2012-11-14 | 西安交通大学 | Direct-current-side voltage control method of cascaded STATCOM (static var compensator) based on chopping-control voltage sharing and control circuit |
| CN104377714A (en) * | 2014-11-17 | 2015-02-25 | 荣信电力电子股份有限公司 | SVG-based compensation method for low-frequency oscillation of power grid |
| CN105098803A (en) * | 2015-10-08 | 2015-11-25 | 中南大学 | STATCOM (static synchronous compensator) based subsynchronous oscillation and low frequency oscillation suppression method for wind farm |
| US20160134114A1 (en) * | 2013-06-18 | 2016-05-12 | Vestas Wind Systems A/S | Compensating electrical harmonics on the electrical grid |
-
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- 2016-10-21 CN CN201610921623.1A patent/CN106451496B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035211A (en) * | 2010-10-26 | 2011-04-27 | 国家电网公司 | Method, device and system for inhibiting low-frequency oscillation of power system |
| CN202206145U (en) * | 2011-06-28 | 2012-04-25 | 辽宁荣信众腾科技有限公司 | Restraining device for low-frequency oscillation of voltage of distribution network |
| CN102780226A (en) * | 2012-08-08 | 2012-11-14 | 西安交通大学 | Direct-current-side voltage control method of cascaded STATCOM (static var compensator) based on chopping-control voltage sharing and control circuit |
| US20160134114A1 (en) * | 2013-06-18 | 2016-05-12 | Vestas Wind Systems A/S | Compensating electrical harmonics on the electrical grid |
| CN104377714A (en) * | 2014-11-17 | 2015-02-25 | 荣信电力电子股份有限公司 | SVG-based compensation method for low-frequency oscillation of power grid |
| CN105098803A (en) * | 2015-10-08 | 2015-11-25 | 中南大学 | STATCOM (static synchronous compensator) based subsynchronous oscillation and low frequency oscillation suppression method for wind farm |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217335A (en) * | 2018-08-22 | 2019-01-15 | 华中科技大学 | A kind of low-frequency oscillation damping control method of offshore wind farm VSC-HVDC output system |
| CN109217335B (en) * | 2018-08-22 | 2020-07-10 | 华中科技大学 | Low-frequency oscillation damping control method for alternating current power system of offshore wind power VSC-HVDC output system |
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Address after: 830011 Xinjiang Uygur Autonomous Region Urumqi Hi-tech Industrial Development Zone (New Urban District) No. 66 East Lane, Changchun Middle Road Applicant after: STATE GRID XINJIANG ELECTRIC POWER CO., LTD., ELECTRIC POWER Research Institute Applicant after: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. Address before: 830011 Xinjiang Uygur Autonomous Region Urumqi Hi-tech Industrial Development Zone (New Urban District) No. 66 East Lane, Changchun Middle Road Applicant before: ELECTRIC POWER SCIENCES RESEARCH INSTITUTE OF STATE GRID XINJIANG ELECTRIC POWER Co. Applicant before: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. |
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