CN203243057U - Megawatt-level blower fan frequency-modulating system - Google Patents
Megawatt-level blower fan frequency-modulating system Download PDFInfo
- Publication number
- CN203243057U CN203243057U CN2013201822023U CN201320182202U CN203243057U CN 203243057 U CN203243057 U CN 203243057U CN 2013201822023 U CN2013201822023 U CN 2013201822023U CN 201320182202 U CN201320182202 U CN 201320182202U CN 203243057 U CN203243057 U CN 203243057U
- Authority
- CN
- China
- Prior art keywords
- frequency modulation
- power
- energy conversion
- frequency
- wind energy
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The utility model discloses a megawatt-level blower fan frequency-modulating system connected to a wind driven generator power system through an electrifying net point. The megawatt-level blower fan frequency-modulating system adopts a resistivity method for frequency modulation and includes a control module and an execution module, wherein the control module controls the execution module. The execution module is provided with a frequency modulation resistor. According to the utility model, by adopting a resistor heating system, improving capacity appropriately and adding a power electronic matrix solid switch and a control unit, active power of the heating (frequency modulation) resistor is adjusted according to dynamic power grid frequency measured by operating a wind turbine or the resistivity-method frequency-modulating system, so that frequency of a power grid is maintained in an optimal reasonable range, requirements for quick frequency modulation of the wind turbine of SGCC (State Grid Corporation of China) are satisfied and stable operation of power grid frequency is maintained reliably.
Description
Technical field
The utility model relates to the control technique in power system apparatus field of new forms of energy, the electric-resistivity method frequency modulation system when particularly MW class wind turbine group active power is surfed the Net.
Background technology
Wind power generation is the main occupation mode that cleans now green energy resource.But at present, wind-electricity integration can cause that the electrical network quality of power supply descends, harmonic pollution, can cause the problem such as unstable of line voltage, frequency when Large Scale Wind Farm Integration is incorporated into the power networks.Because the unsteadiness of wind-powered electricity generation to still boneless electrical network formation impact of China, makes wind energy turbine set utilize hourage excessively low, can't form scale effect, causes Wind Power Project internal investment return rate to be lower than 8% social average level, lacks investment appeal.
Wind-driven generator be with wind as motive power, the stochastic volatility of wind and the intermittent output characteristic that has determined wind-driven generator also are fluctuations and intermittently.Wind-driven generator mostly is asynchronous generator, also will be from system's absorbing reactive power when sending active power, and its reactive requirement is to change with meritorious variation of exporting.When the capacity of wind energy turbine set hour, these characteristics are not remarkable on the impact of electric power system, but along with the increase of wind energy turbine set capacity proportion in system, wind energy turbine set will be more and more obvious on the impact of system.The impact that extensive wind field is incorporated into the power networks on electrical network can be divided into two classes, and the one, on the impact of system's dynamic behaviour, comprise the impact of transient stability, voltage stabilization and electric harmonic etc.; The 2nd, the impact of grid dispatching management, comprise on the economy operation of power grid mode arrange, peak modulation capacity and on the impact of power grid accident processing etc.
The frequency modulation of wind-driven generator refers to when the mains frequency offrating, the increase (when frequency descends) of generator control system control active power or minimizing (when frequency raises), the feature that changes to limit mains frequency.
The blade of general wind energy conversion system can not be done frequency modulation and use, because the frequency of wind power generation power network frequent fluctuation, if frequent the use, blade strength, fatigue life are greatly affected greatly.
Large capacity and problem extensive, the access of distributing wind power generation power network are subject to concern and the attention of people and social public institution day by day.Wind turbine generator should satisfy grid company to generating requirements such as other water, thermoelectricitys.In the urgent need to the solution of wind-electricity integration, make the electrical network user make good use of wind-powered electricity generation at present, do not have trouble and worry.
The utility model content
Goal of the invention of the present utility model is: for the problem of above-mentioned existence, provide the existing most of wind energy conversion system of a kind of Megawatt fan frequency modulation system utilization to be designed with resistance heating, the technology of dehumidification system, resistive heating system is used in proposition, suitable improvement capacity, add power electronics matrix solid-state switch and control unit, the dynamic mains frequency of surveying according to operation wind energy conversion system or electric-resistivity method frequency modulation system, by the frequency adjustment requirement of electrical network to the wind energy conversion system access, regulate heating resistor with △ f/ △ r method attitude, the frequency of safeguarding electrical network of doing one's duty reaches and satisfies State Grid Corporation of China to frequency modulation and the fast frequency hopping requirement of wind energy conversion system in rationally best scope.
The technical solution adopted in the utility model is such:
A kind of Megawatt fan frequency modulation system, by the site access wind-driven generator electric power system that powers on, frequency modulation system adopts electric-resistivity method frequency modulation, comprises control module and Executive Module, and wherein control module control Executive Module has frequency modulation resistance in the Executive Module.
Described frequency modulation resistance is PTC resistance.
Also have the matrix solid-state switch in the described Executive Module, the matrix solid-state switch links to each other with frequency modulation resistance with control module respectively; Described frequency modulation system and its power on and are provided with resistance frequency modulation circuit breaker between the site.
Described matrix solid-state switch is independence or dependent solid-state switch.
Described matrix solid-state switch is frequency converter, chopper or HVDC Modulation device.
Be applicable to the blower fan that the resistance R capacity is fan capacity 20%-50%, can do the blower fan islet operation.
Described fan capacity scope is the 0.1MW-19MW wind energy conversion system.
The blower fan type is the double-fed wind energy conversion system, directly drives total power blower fan, toothed total power wind energy conversion system, mechanical frequency modulation wind energy conversion system, electric frequency modulation wind energy conversion system, dynamo-electric frequency modulation component machine or the asynchronous wind energy conversion system of mixing.
Blower fan is the horizontal blower fan of N blade profile or vertical blower fan.
System connects independence or dependent control appliance and software.
Electric power system effectively equivalence is a virtual large generator and a large equivalent resistance, as the A wind energy conversion system of electric power system equivalent generator one one's share of expenses for a joint undertaking, and the A wind energy conversion system frequency modulation resistance of electric power system equivalent resistance load one one's share of expenses for a joint undertaking.
But the electric power system people is for being considered as being divided into two power supplys and two loads.A source power system equivalence (greatly) generator (not containing the A wind energy conversion system) and electric power system equivalent resistance (not containing A wind energy conversion system frequency modulation resistance); Another power supply A wind energy conversion system and A wind energy conversion system frequency modulation resistance (Fig. 1).
Fig. 1, electric power system is divided into the model that two power supplys add two ohmic loads.
During electrical network 50Hz stable state, the large generator speed of active-power P xd(that electric power system equivalence (greatly) generator prime mechanical output Pm equals to send is stabilized in synchronous speed), also at every moment equal equivalent resistance bearing power PxR simultaneously.
The A wind energy conversion system: double-fed, total power type (contain gear box or non-gear box, generator is asynchronous squirrel-cage machine, synchronous frequency changer, permanent magnetic motor etc.), the frequency modulation rule of pressing electrical network participates in the frequency modulation work of electrical network.
According to the dynamic mains frequency surveyed of operation wind energy conversion system, the frequency adjustment requirement that wind energy conversion system is accessed by electrical network is with △ f/ △ r method dynamic adjustments heating resistor.
When mains frequency is 50+ △ fx(electrical network rated frequency 50Hz, actual operating frequency f, actual frequency deviation △ fx=f-50; During │ △ fx │≤2.5Hz), large generator prime mechanical output Pm is greater than or less than the active-power P xd that sends, the active power of the A wind energy conversion system Pxf (1-△ fx/50) that exerts oneself, resistance frequency modulation active-power P xf * (△ fx/50+2.5/50), the active-power P xf of the site that powers on (1-△ fx/50-2.5/50).Simultaneously electric power system (large generator adds the A wind energy conversion system) exert oneself [Pxd+Pxf (1-△ fx/50-2.5/50)] also at every moment equals equivalent resistance bearing power PxR.Be 50Hz at mains frequency simultaneously, the specified active power of A wind energy conversion system is exerted oneself and is Pe, resistance frequency modulation active-power P e * 2.5/50, upper the site active power Pe (1-2.5/50) that exerts oneself; P-n curve under other operating mode of blower fan moves down 2.5/50 in proportion.
In addition, all MW level wind energy conversion system set of electric power system all possess so little function, all abide by the network planning execution and should use up the operation of frequency modulation responsibility.
Voltage signal according to A wind energy conversion system controller detects at the site PT voltage transformer that powers on through the detection of three-phase voltage dividing potential drop, anti-aliasing filter, zero passage detection, frequency number value, relatively generates with rated frequency
△ fx (t) detects motor speed signal at every moment, according to the P-n curve interpolation generation Pxf (n, t) of blower fan, regeneration Pxf (n, t) is through formula P
R(n, t)=Pxf * △ fx/50 generates P
R(n, t) regulates through PI, through the time delays △ t of equivalence, generates P
R(n, t+ △ t) signal, matrix solid-state switch (IGBT, thyristor etc.) and frequency modulation resistance R generate actual power loss P
R(n, t+ △ t).
In addition, at the site voltage transformer (PT) that powers on, the current signal through three-phase voltage dividing potential drop detectable voltage signals summation current transformer (CT1) detects detects generation Pxf (n through the outer filtering of 20-30Hz and frequency division active power according to A wind energy conversion system controller, t, f
20-30), after tactful trace analysis weighting K=0.1-0.5 processed, with the current signal that current transformer (CT2) detects, outer filtering detected and generates P through 20-30Hz
R(n, t, f
20-30), with Pxf (n, t, f
20-30) relatively, the △ P of regeneration
RXf (n, t, f
20-30), subtract each other, obtain △ P
RXf (n, t, f
20-30)+K*Pxf (n, t, f
20-30) signal; Through the time delays △ t of equivalence, generate △ P
RXf (n, t+ △ t, f
20-30)+K*Pxf (n, t+ △, f
20-30) signal, gating matrix solid-state switch (IGBT, thyristor etc.) and frequency modulation resistance R generate actual power loss P
RXf (n, t+ △ t, f
20-30)+K*Pxf (n, t+ △, f
20-30).
The blower fan instantaneous active power (20Hz-30Hz) that detects according to CT1 and PT, controller and software by special realization power/frequency control block diagram, pass through matrix solid-state switch regulating resistance R with (20Hz-30Hz) 33ms-50ms cycle frequency division, absorb A wind energy conversion system part instantaneous active power peak value, reduce power on the site in short-term instantaneous active power spring up, purpose reduces A wind energy conversion system (20Hz-30Hz) voltage flicker that PCC is ordered.
All MW level wind energy conversion system set of electric power system all possess such function, all wind energy conversion system (20Hz-30Hz) voltage flicker.
Every MW level wind energy conversion system, specified active-power P e considers that electric-resistivity method frequency modulation maximum magnitude is ± 2.5Hz.Therefore, during the operation of wind energy conversion system rated point, every wind energy conversion system active power is Pe, and electric-resistivity method frequency modulation active power maximum ± 5%Pe is under the maximum active-power P e(47.5Hz in the site that powers on), under the minimum active power 90%Pe(52.5Hz in the site that powers on).For example: during 50Hz, the specified active power 95%Pe of wind energy conversion system; 49.5Hz the time, the specified active power 0.96%Pe of wind energy conversion system, during 50.5Hz, the specified active power 0.94%Pe of wind energy conversion system.When wind energy conversion system went out the force operation at other, in above wind energy conversion system normal output ratio, electric-resistivity method frequency modulation got final product.
PTC is the abbreviation of Positive Temperature Coefficient, and the meaning is positive temperature coefficient, very large semi-conducting material or the components and parts of general reference positive temperature coefficient.Usually we PTC that mentions refers to semistor, is called for short the PTC thermistor.
The PTC thermistor is the semiconductor resistor that a kind of typical case has temperature sensitivity, and when surpassing certain temperature (Curie temperature), its resistance value is along with the rising of temperature is increasing of step evolution.
" flickering " is as the evaluation index of weighing the voltage fluctuation extent of injury.The main determining factor of flickering has amplitude, frequency and the waveform etc. of mains ripple.
Behind the large-scale wind electricity set grid-connection, owing to the voltage flicker that the factors such as wind regime, wind turbine set type, electrical network situation cause, had a strong impact on the quality of power supply of electrical network.In recent years, the problem about the quality of power supply attracts wide attention.Quality of power supply leading indicator comprises voltage fluctuation and flicker, temporary overvoltage and transient overvoltage, voltage deviation, frequency departure, utility network harmonic wave and imbalance of three-phase voltage degree.Voltage flicker is caused by voltage fluctuation, and the fluctuation of line voltage mainly is the fluctuation of reactive power.
The measure of eliminating the flickering impact comprises adopts frequency division (frequency band) to regulate, and to pulsation peak value weighting regulating and controlling, eliminates the flickering impact of part or all of wind energy conversion system in 20Hz～30Hz.
The heat that above electric-resistivity method frequency modulation occurs is lower than 20 ℃ in ambient temperature, uses as heating, the dehumidifying of wind energy conversion system equipment; Be higher than 20 ℃ in ambient temperature, the resistance heating heat is effluxed among the atmosphere outside wind energy conversion system, part can be used as the dehumidifying of wind energy conversion system equipment.
Electric-resistivity method frequency modulation designing apparatus described in the utility model and technology, having proposed every wind energy conversion system is exactly a power plant, the responsibility of operation of power networks capacity one's share of expenses for a joint undertaking just should participate in the frequency modulation work of electrical network under just should bearing, and safeguards that as possible the frequency of electrical network is in rationally best scope.
Every MW class wind energy conversion system has possessed this function, and blower fan also just can be by electrical network requirement frequency modulation and fast frequency hopping so.
System described in the utility model is according to " the GB_T_15945-2008_ quality of power supply _ power system frequency deviation " Specification Design.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
The inventor uses resistive heating system, suitable improvement capacity, add power electronics matrix solid-state switch and control unit, dynamic electrical network frequency adjustment heating (frequency modulation) resistance active power of surveying according to operation wind energy conversion system or electric-resistivity method frequency modulation system, safeguard that the frequency of electrical network is in rationally best scope, reach and satisfy State Grid Corporation of China to frequency modulation and the fast frequency hopping requirement of wind energy conversion system, do one's duty and safeguard mains frequency stable operation, generate electricity by way of merging two or more grid systems for the blower fan long-term stability and made contribution.
Description of drawings
Fig. 1 is electric power system equivalent generator described in the utility model and ohmic load model (the A wind energy conversion system is told) schematic diagram;
Fig. 2 is Megawatt fan frequency modulation system described in the utility model and blower fan electric power system connection diagram;
Fig. 3 is that power/frequency described in the utility model is regulated sagging curve;
Fig. 4 is power/frequency control schematic diagram described in the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Arrive shown in Figure 4 such as Fig. 1, structure of the present utility model and control schematic diagram, a kind of Megawatt fan frequency modulation system, by the site access wind-driven generator electric power system that powers on, frequency modulation system adopts electric-resistivity method frequency modulation, comprise control module and Executive Module, wherein control module control Executive Module has frequency modulation resistance in the Executive Module.
Described frequency modulation resistance is PTC resistance.
Also have the matrix solid-state switch in the described Executive Module, the matrix solid-state switch links to each other with frequency modulation resistance with control module respectively; Described frequency modulation system and its power on and are provided with resistance frequency modulation circuit breaker between the site.
Described matrix solid-state switch is independence or dependent solid-state switch.
Described matrix solid-state switch is frequency converter, chopper or HVDC Modulation device.
Be applicable to the blower fan that the resistance R capacity is fan capacity 20%-50%, can do the blower fan islet operation.
Described fan capacity scope is the 0.1MW-19MW wind energy conversion system.
The blower fan type is the double-fed wind energy conversion system, directly drives total power blower fan, toothed total power wind energy conversion system, mechanical frequency modulation wind energy conversion system, electric frequency modulation wind energy conversion system, dynamo-electric frequency modulation component machine or the asynchronous wind energy conversion system of mixing.
Blower fan is the horizontal blower fan of N blade profile or vertical blower fan.
System connects independence or dependent control appliance and software.
Below be that independently the frequency modulation that carries out of the frequency data that receive according to the site that powers on of wind energy conversion system is for example:
During electrical network 50Hz stable state, the large generator speed of active-power P xd(that electric power system equivalence (greatly) generator prime mechanical output Pm equals to send is stabilized in synchronous speed), the active-power P xd that sends adds that A wind energy conversion system Pxf also at every moment equals equivalent resistance bearing power PxR simultaneously and adds A wind energy conversion system frequency modulation ohmic load P
FR
During electrical network 50.2Hz stable state, electric power system equivalence (greatly) generator prime mechanical output Pm greater than the large generator speed of active-power P xd(of sending greater than synchronous speed 0.4%) 0.4%, the active-power P xd that sends adds that the A wind energy conversion system Pxf while also at every moment equals equivalent resistance bearing power PxR and adds A wind energy conversion system frequency modulation ohmic load P
FR
During electrical network 50.5Hz stable state, electric power system equivalence (greatly) generator prime mechanical output Pm greater than the large generator speed of active-power P xd(of sending greater than synchronous speed 1%) 1%, the active-power P xd that sends adds that the A wind energy conversion system Pxf while also at every moment equals equivalent resistance bearing power PxR and adds A wind energy conversion system frequency modulation ohmic load P
FR
During electrical network 52.5Hz stable state, electric power system equivalence (greatly) generator prime mechanical output Pm greater than the large generator speed of active-power P xd(of sending greater than synchronous speed 5%) 5%, the active-power P xd that sends adds that the A wind energy conversion system Pxf while also at every moment equals equivalent resistance bearing power PxR and adds A wind energy conversion system frequency modulation ohmic load P
FR
During electrical network 49.5Hz stable state, electric power system equivalence (greatly) generator prime mechanical output Pm less than the large generator speed of active-power P xd(of sending less than synchronous speed 1%) 1%, the active-power P xd that sends adds that the A wind energy conversion system Pxf while also at every moment equals equivalent resistance bearing power PxR and adds A wind energy conversion system frequency modulation ohmic load P
FR
During electrical network 48Hz stable state, electric power system equivalence (greatly) generator prime mechanical output Pm less than the large generator speed of active-power P xd(of sending less than synchronous speed 4%) 4%, the active-power P xd that sends adds that the A wind energy conversion system Pxf while also at every moment equals equivalent resistance bearing power PxR and adds A wind energy conversion system frequency modulation ohmic load P
FR
During electrical network 47.5Hz stable state, electric power system equivalence (greatly) generator prime mechanical output Pm less than the large generator speed of active-power P xd(of sending less than synchronous speed 5%) 5%, the active-power P xd that sends adds that the A wind energy conversion system Pxf while also at every moment equals equivalent resistance bearing power PxR and adds A wind energy conversion system frequency modulation ohmic load P
FR
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. Megawatt fan frequency modulation system, by the site access wind-driven generator electric power system that powers on, it is characterized in that: frequency modulation system adopts electric-resistivity method frequency modulation, comprises control module and Executive Module, wherein control module control Executive Module has frequency modulation resistance in the Executive Module.
2. Megawatt fan frequency modulation system according to claim 1, it is characterized in that: described frequency modulation resistance is PTC resistance.
3. Megawatt fan frequency modulation system according to claim 1, it is characterized in that: also have the matrix solid-state switch in the described Executive Module, the matrix solid-state switch links to each other with frequency modulation resistance with control module respectively; Described frequency modulation system and its power on and are provided with resistance frequency modulation circuit breaker between the site.
4. Megawatt fan frequency modulation system according to claim 3, it is characterized in that: described matrix solid-state switch is independence or dependent solid-state switch.
5. Megawatt fan frequency modulation system according to claim 4, it is characterized in that: described matrix solid-state switch is frequency converter, chopper or HVDC Modulation device.
6. Megawatt fan frequency modulation system according to claim 1 is characterized in that: be applicable to the blower fan that the resistance R capacity is fan capacity 20%-50%, can do the blower fan islet operation.
7. Megawatt fan frequency modulation system according to claim 6, it is characterized in that: described fan capacity scope is the 0.1MW-19MW wind energy conversion system.
8. Megawatt fan frequency modulation system according to claim 6 is characterized in that: the blower fan type is the double-fed wind energy conversion system, directly drives total power blower fan, toothed total power wind energy conversion system, mechanical frequency modulation wind energy conversion system, electric frequency modulation wind energy conversion system, dynamo-electric frequency modulation component machine or the asynchronous wind energy conversion system of mixing.
9. Megawatt fan frequency modulation system according to claim 6 is characterized in that: blower fan is the horizontal blower fan of N blade profile or vertical blower fan.
10. Megawatt fan frequency modulation system according to claim 1 is characterized in that: system's connection independence or dependent control appliance and software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201822023U CN203243057U (en) | 2013-04-12 | 2013-04-12 | Megawatt-level blower fan frequency-modulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201822023U CN203243057U (en) | 2013-04-12 | 2013-04-12 | Megawatt-level blower fan frequency-modulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243057U true CN203243057U (en) | 2013-10-16 |
Family
ID=49320316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201822023U Expired - Fee Related CN203243057U (en) | 2013-04-12 | 2013-04-12 | Megawatt-level blower fan frequency-modulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203243057U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561437A (en) * | 2016-06-30 | 2018-01-09 | 中国电力科学研究院 | A kind of Wind turbines primary frequency modulation method of testing |
| CN107687399A (en) * | 2017-08-29 | 2018-02-13 | 成思琪 | The tower and its temperature control frequency modulation system of wind-driven generator |
-
2013
- 2013-04-12 CN CN2013201822023U patent/CN203243057U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561437A (en) * | 2016-06-30 | 2018-01-09 | 中国电力科学研究院 | A kind of Wind turbines primary frequency modulation method of testing |
| CN107561437B (en) * | 2016-06-30 | 2021-09-03 | 中国电力科学研究院有限公司 | Primary frequency modulation testing method for wind turbine generator |
| CN107687399A (en) * | 2017-08-29 | 2018-02-13 | 成思琪 | The tower and its temperature control frequency modulation system of wind-driven generator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bonfiglio et al. | Design and implementation of a variable synthetic inertia controller for wind turbine generators | |
| Aghatehrani et al. | Sensitivity-analysis-based sliding mode control for voltage regulation in microgrids | |
| Rajaei et al. | PMSG‐based variable speed wind energy conversion system using Vienna rectifier | |
| Kanellos et al. | Control of variable speed wind turbines equipped with synchronous or doubly fed induction generators supplying islanded power systems | |
| CN105633997A (en) | Wind generating set voltage crossing control method and device | |
| CN102904266B (en) | Method for determining inactive compensation capacity network adaptability of wind power plant | |
| CN105633998A (en) | Wind generating set high-voltage crossing control method and device | |
| CN105633999A (en) | High-voltage crossing control method and device under imbalanced sudden rise of power grid voltage | |
| Abbey et al. | Energy management strategies for optimization of energy storage in wind power hybrid system | |
| Song et al. | Stability and control of a grid integrated DFIM based variable speed pumped storage system | |
| CN203243057U (en) | Megawatt-level blower fan frequency-modulating system | |
| Dahiya | Superconducting magnetic energy storage coupled static compensator for stability enhancement of the doubly fed induction generator integrated system | |
| Nirosha et al. | Power quality issues of wind and solar energy systems integrated into the grid | |
| CN104362643B (en) | Method for calculating reactive compensation configured capacity for wind farm | |
| Patel et al. | Power quality improvement with Static Compensator on grid integration of wind energy system | |
| Subburaja et al. | Battery connected DFIG wind system analysis for strong/weak grid scenarios | |
| Sharaf et al. | A novel voltage stabilization control Scheme for stand-alone wind energy conversion systems | |
| Mgaya et al. | The impact of connecting distributed generation to the distribution system | |
| Amita et al. | Power quality comparison of grid connected wind energy system with STATCOM and UPQC | |
| CN102916433A (en) | Reactive power task allocation method for fan group | |
| Bamukunde et al. | A study on mitigation techniques for reduction and elimination of solar PV output fluctuations | |
| Hu et al. | Auxiliary frequency control of HVDC systems for wind power integration | |
| CN205335866U (en) | Control system that is incorporated into power networks under wind power system trouble condition | |
| Choube | Research on fuzzy logic-based wind grid system to improve power quality | |
| Gray et al. | AC series dynamic resistor protection scheme with switching control for doubly fed induction generator based WECS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20180412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |