CN106877360A - One kind stabilizes output power of wind power generation undulated control method - Google Patents
One kind stabilizes output power of wind power generation undulated control method Download PDFInfo
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- CN106877360A CN106877360A CN201510914878.0A CN201510914878A CN106877360A CN 106877360 A CN106877360 A CN 106877360A CN 201510914878 A CN201510914878 A CN 201510914878A CN 106877360 A CN106877360 A CN 106877360A
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
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Abstract
One kind stabilizes output power of wind power generation undulated control method, including the control of pwm converter, dcdc converter, capacitor and batteries control four parts.Control method proposed by the present invention, the low-frequency fluctuation of power output is compensated using batteries, and ultracapacitor is then used to compensate the high-frequency fluctuation of power output, during consider the demand of dispatching of power netwoks.And control method is conducive to evading the restriction of ultracapacitor compensation power limit and prevents the batteries from carrying out frequent discharge and recharge.Have compared with before compensation through the power swing amplitude after overcompensation and significantly reduce, and power output can be stablized near scheduling desired value after compensation, control effect is preferable.
Description
Art
Output power of wind power generation undulated control method is stabilized the present invention relates to a kind of wind-power electricity generation, more particularly to one kind.
Background technology
The energy and environment are mankind nowadays survival and development pressing problems to be solved, and the exploitation to regenerative resource, the particularly exploitation to wind energy are paid much attention to by countries in the world, and double-fed wind power generator control technology is also more ripe.But wind energy is different from conventional energy resource, with randomness, therefore, large-scale wind-electricity integration can be adversely affected to power network, and can bring difficulty to Power Grid Dispatching Work.In recent years, many researchs have been carried out in the harm for being brought for reduction wind energy randomness, and the constantly improve of energy storage device performance also provides more powerful hardware supported to stabilize output power of wind power generation.
The existing certain achievement of the research stabilized for output power of wind power generation, presently mainly realizes power and stabilizes using 2 kinds of energy storage devices of batteries and ultracapacitor.Conventional method carries out the feasibility that wind generator system power is stabilized for example with batteries, while analyzing the control principle of battery interface circuit.Method also carries out the control strategy that wind generator system power is stabilized using ultracapacitor, gives using the capacitor interface structure of DCDC chopper circuits.
The content of the invention
In order to overcome the randomness of the wind generator system power output problem having a negative impact grid-connected to large-scale wind power, the present invention to propose that one kind stabilizes output power of wind power generation undulated control method.
The technical solution adopted for the present invention to solve the technical problems is.
Using batteries and the mixed energy storage system of ultracapacitor, the control method of output power of wind power generation is stabilized using it.The control method for being proposed will compensate power and be divided into 2 parts of high and low frequency and compensate, and deficiency when energy storage device is used alone be overcome to a certain extent, and the demand of dispatching of power netwoks is considered in compensation process.
Stabilize output power of wind power generation undulated control method and control four parts including pwm converter, dcdc converter, capacitor control and batteries.
Be connected to the grid for ultracapacitor and batteries by the pwm converter.
The dcdc converter is Buck/Boost chopper circuits, and ultracapacitor passes through it directly and double fed induction generators（DFIG）DC link capacitor is connected.
The output-power fluctuation that the capacitor controls compensation frequency higher and irregular fluctuations in wind speed causes.
The batteries control uses uneoupled control, output-power fluctuation during main compensation low frequency, and the difference for existing between compensation network dispatch value and wind power prediction value.
The beneficial effects of the invention are as follows：Control method proposed by the present invention, the low-frequency fluctuation of power output is compensated using batteries, and ultracapacitor is then used to compensate the high-frequency fluctuation of power output, during consider the demand of dispatching of power netwoks.And control method is conducive to evading the restriction of ultracapacitor compensation power limit and prevents the batteries from carrying out frequent discharge and recharge.Have compared with before compensation through the power swing amplitude after overcompensation and significantly reduce, and power output can be stablized near scheduling desired value after compensation, control effect is preferable.
Brief description of the drawings
Fig. 1 mixed energy storage systems.
Fig. 2 mixed energy storage systems are controlled.
Specific embodiment
In Fig. 1, DFIG is double fed induction generators, and batteries and super capacitor are connected to the grid by net side pwm converter and dcdc converter respectively.Double-fed wind power generator is in stable state（It is metasynchronism, synchronous, supersynchronous）When rotor lateral stator side slip power is provided.In Fig. 1, reference power is, while introduce the power prediction value calculated according to forecasting wind speed being referred to as wind power plant generating capacity.
In order to reduce the switching times of batteries charging and discharging state, increase the service life of batteries, low-frequency compensation is carried out using batteries.Due to there is certain gap between dispatching of power netwoks value and wind power prediction value, and both of which remains constant within a certain period of time, therefore the difference between both is compensated using batteries, then batteries absorbed power reference value is.And due to the randomness of wind energy, having that frequency is higher and irregular fluctuations in wind speed in the compensation cycle of battery, the output-power fluctuation caused by these fluctuations in wind speed is accomplished by ultracapacitor to compensate it.Ultracapacitor absorbed power reference value is.At the end of a batteries compensation cycle, wind power prediction value can be updated, so as to cause the transition of ultracapacitor reference power.
In Fig. 1, there is interconversion rate limit value link, because the compensation power of ultracapacitor needs to be input into power network by double-fed wind power generator grid side converter, and grid side converter double-closed-loop control can produce it is certain delayed, thus can cause it is compensated after wind driven generator output power produce a spike.This is unfavorable for the quality of power supply of power network, therefore adds a rate of change limiting element to signal.
In Fig. 2, by calculating virtual wind speed, estimation electromagnetic power, and then the power that double-fed wind power generator is exported to power network is calculated.By forecasting wind speed and wind-driven generator power calculation, reference power calculating is carried out to ultracapacitor and batteries respectively.Finally according to reference power, batteries and super capacitor are controlled respectively.Ultracapacitor and batteries compensation value and power reference provide start pulse signal after being calculated through control module, are respectively acting on the corresponding controlled thyristor of Buck-Boost circuits and pwm converter, realize compensating 2 kinds of energy storage devices the control of power.
Claims (5)
1.One kind stabilizes output power of wind power generation undulated control method, it is characterised in that：Including PWM Converter, DCDC Converter, capacitor control and batteries control four parts.
2.Such as claim 1 Described one kind stabilizes output power of wind power generation undulated control method, it is characterised in that described PWM Be connected to the grid for ultracapacitor and batteries by converter.
3.Such as claim 1 Described one kind stabilizes output power of wind power generation undulated control method, it is characterised in that described DCDC Converter is Buck/Boost Chopper circuit, ultracapacitor is directly connected by it with double fed induction generators.
4.Such as claim 1 Described one kind stabilizes output power of wind power generation undulated control method, it is characterised in that the output-power fluctuation that the capacitor controls compensation frequency higher and irregular fluctuations in wind speed causes.
5.Such as claim 1 Described one kind stabilizes output power of wind power generation undulated control method, it is characterised in that the output-power fluctuation during batteries control compensation low frequency, and the difference for existing between compensation network dispatch value and wind power prediction value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510914878.0A CN106877360A (en) | 2015-12-13 | 2015-12-13 | One kind stabilizes output power of wind power generation undulated control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510914878.0A CN106877360A (en) | 2015-12-13 | 2015-12-13 | One kind stabilizes output power of wind power generation undulated control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106877360A true CN106877360A (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510914878.0A Pending CN106877360A (en) | 2015-12-13 | 2015-12-13 | One kind stabilizes output power of wind power generation undulated control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383072A (en) * | 2021-01-14 | 2021-02-19 | 南方电网数字电网研究院有限公司 | Hybrid energy storage regulation and control method based on 5G communication |
| EP4009468A1 (en) * | 2020-12-02 | 2022-06-08 | General Electric Renovables España S.L. | System and method for controlling a wind turbine |
-
2015
- 2015-12-13 CN CN201510914878.0A patent/CN106877360A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4009468A1 (en) * | 2020-12-02 | 2022-06-08 | General Electric Renovables España S.L. | System and method for controlling a wind turbine |
| US11401918B2 (en) | 2020-12-02 | 2022-08-02 | General Electric Renovables Espana, S.L. | System and method for controlling a wind turbine |
| CN112383072A (en) * | 2021-01-14 | 2021-02-19 | 南方电网数字电网研究院有限公司 | Hybrid energy storage regulation and control method based on 5G communication |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170620 |
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| WD01 | Invention patent application deemed withdrawn after publication |