CN104135031B - A kind of wind generator system - Google Patents
A kind of wind generator system Download PDFInfo
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- CN104135031B CN104135031B CN201410393483.6A CN201410393483A CN104135031B CN 104135031 B CN104135031 B CN 104135031B CN 201410393483 A CN201410393483 A CN 201410393483A CN 104135031 B CN104135031 B CN 104135031B
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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
Abstract
The present invention relates to a kind of wind generator system, this system comprises grid power source inverter and automatic generation amount controls (AGC) Coordination module, can based on the wind-driven generator operation conditions of Real-time Obtaining, electrical network real-time running data, setting wind-driven generator is incorporated into the power networks parameter, improve wind energy utilization rate, and the impact of Parallel Operation on Power System can be reduced.
Description
Technical field
The present invention relates to a kind of wind generator system.
Background technology
Current, wind power generation is the forms of electricity generation of the most ripe, the most exploitation scale of technology and most commercialized development prospect during regenerative resource develops.Due to its alleviating environmental pollution, readjust the energy structure, to promote sustainable development etc. in outstanding role, wind power generation is important green energy resource in this century, is one of important alternative energy source of the conventional energy resource generatings such as coal.In addition, wind-powered electricity generation is compared with thermoelectricity, water power and nuclear power, and construction period short, instant effect, building a Large Scale Wind Farm Integration only needs less than year, and therefore wind-powered electricity generation is the world is always fastest-rising clean energy resource, has good development prospect.
In some regional power grids of China, wind power generation has become one of main power source.The electrical network comprising large-scale wind power access has himself characteristic in the link such as peak valley adjustment, FREQUENCY CONTROL, voltage control, to greatest extent performance energy storage effect, and traditional dispatch automated system can not adapt to the needs of its management and running completely.Because the regenerative resources such as wind-powered electricity generation self have the feature of " unfriendly " such as fluctuation, intermittence, anti-peak regulation, low schedulabilities, challenge is proposed to the dispatching of power netwoks mode of traditional " generating follow load ".Power supply, between electrical network and load three, coordination and interaction should be carried out, not only be conducive to the energy and the power dynamic equilibrium ability that improve electric power system, also being conducive to the lifting realizing bulk power grid most optimum distribution of resources and comprehensive utilization rate of energy source, is the important development direction of intelligent grid.
Main blower fan type is in the market double-fed and direct-driving type two kinds, the wherein leading share of double-fed blower fan occuping market.Double-feedback aerogenerator group gaining merit and reactive power support ability when unbalanced source voltage, must be based upon can be meritorious with on the basis of reactive power set-point by controlling to make double-fed unit also can export smoothly when unbalanced source voltage.This double feed wind power generator and network process mainly realize in two steps: the first step, start current transformer to double-fed generator carry out excitation to adjust double-fed generator stator side voltage-phase, frequency, amplitude and electric network voltage phase, frequency, amplitude are consistent; Second step, closed grid-connected contactor is communicated with electrical network, realizes and network process.In first step process, double-fed generator stator side voltage-phase, frequency, amplitude and electric network voltage phase, frequency, amplitude can be adjusted to relatively, but still have some errors, when therefore grid-connected contactor closes in second step process, very large impulse current can be caused.
Summary of the invention
For solving the problem, the invention provides a kind of wind generator system, by this system, can the fluctuation situation of instant prediction load power and electrical network, according to current wind situation, generate electricity adaptively, when being incorporated into the power networks, the impact to electrical network can be reduced, the interworking with open arms to electrical network can be realized.
To achieve these goals, the invention provides a kind of wind generator system, this system comprises:
Wind-driven generator, for Wind resource change is become electric energy, wherein this wind-driven generator adopts double feedback electric engine;
Blower voltage, electric current, rotating speed sampling module, for detecting voltage, electric current and rotating speed when motor runs;
Energy module is unloaded in brake, for brake deceleration during motor stall;
Energy-storage module, comprises batteries, for when not grid-connected, and store electrical energy;
Wind-speed sample module, for detecting wind speed in real time;
Microprocessor, for controlling the operation of whole electricity generation system;
Grid power source inverter, its for by grid-connected for wind-driven generator to electrical network, described grid-connected voltage inverter comprises:
Rectification module, the voltage commutation of wind-driven generator can be direct voltage by it;
Copped wave module, described direct voltage copped wave can be square-wave voltage by it;
Sinusoidal filtration module, described square-wave voltage can be filtered into sinusoidal voltage by it;
Voltage changing module, it can will export the changing voltage that can input electrical network after described sinusoidal voltage transformation;
Controllable switch module, it conducting or cut-off can input to the described changing voltage of electrical network.
Preferably, described grid-connected voltage inverter also comprises:
First voltage measurement module, it can measure the instantaneous voltage of electrical network, and exports the first voltage signal that represents this instantaneous voltage;
Second voltage measurement module, it can measure the instantaneous voltage of described changing voltage, and exports the second voltage signal that represents this instantaneous voltage;
The same period indicating module, it can input the instantaneous voltage of electrical network and the instantaneous voltage of described changing voltage respectively, and the index signal same period of the exportable voltage representing electrical network of indicating module described same period and described changing voltage same period; With
Driver module, its can input the instruction that described microprocessor sends, described first voltage signal, described second voltage signal and described same period index signal, described driver module exportable one for controlling the drive control signal of the frequency of described square-wave voltage and the pulse duration exported to described copped wave module, and described driver module exportable one for control described controllable switch module conducting or cut-off switching drive signal to described controllable switch module, synchronous grid-connected with what realize with electrical network, and according to the command output power of microprocessor.
Preferably, this wind generator system also comprises automatic generation amount and controls (AGC) Coordination module, generated output time grid-connected for Forecast and control wind-driven generator, and this module comprises:
Electric network data acquiring unit, can read grid measurement data in real time from grid dispatching center;
Electric network data analytic unit, can carry out data processing and Quality estimation to described grid measurement data, judge the control interval residing for electrical network;
Generated output coordination unit, basic point is obtained by real-time generation schedule, and calculate electrical network regulatory demand, and carry out regulating power distribution according to coordination control strategy, this generated output coordination unit is connected with microprocessor, and send instruction, to control power stage by microprocessor to the driver module of grid power source inverter.
Preferably, described coordination control strategy comprises urgent regulation strategy: when electrical network regulatory demand is positioned at urgent district, wind-driven generator participates in regulating immediately, makes electrical network return to normal condition as early as possible, wherein participates in regulating representing that this unit and other adjustable unit regulate simultaneously.
Preferably, when electrical network regulatory demand is positioned at urgent district, wind-driven generator participates in regulating immediately; If do not need urgent adjustment, then judge whether to need time urgent adjustment downwards.
Preferably, when electrical network not to need time promptly to regulate downwards, then judge whether to need time promptly upwards to regulate, if need to regulate, then wind-driven generator participation upwards regulates; If do not need time promptly upwards to regulate, continue to judge whether that needs normally upwards regulate.
Wind generator system tool provided by the invention has the following advantages: (1) can based on the wind-driven generator operation conditions of Real-time Obtaining, electrical network real-time running data, and setting wind-driven generator is incorporated into the power networks parameter, improves wind energy utilization rate.(2) grid power source inverter and automatic generation amount control (AGC) Coordination module with the use of, while raising generating efficiency, the impact of Parallel Operation on Power System can also be reduced.
Accompanying drawing explanation
Fig. 1 shows the block diagram of a kind of wind generator system of the present invention;
Fig. 2 shows the concrete composition that grid-connected voltage inverter in Fig. 1 in system and automatic generation amount control (AGC) Coordination module.
Embodiment
Fig. 1 shows the block diagram according to wind generator system of the present invention, and this wind generator system comprises: wind-driven generator 7, and for Wind resource change is become electric energy, wherein this wind-driven generator adopts double feedback electric engine; Blower voltage, electric current, rotating speed sampling module 9, for detecting voltage, electric current and rotating speed when motor runs; Energy module 7 is unloaded in brake, for brake deceleration during motor stall; Energy-storage module 5, comprises batteries, and for when not grid-connected, store electrical energy, can input electrical network by electric energy when being incorporated into the power networks, and when wind-driven generator starts, may be used for stand-by motor and starts; Wind-speed sample module 8, for detecting wind speed in real time; Microprocessor 4, for controlling the operation of whole electricity generation system; Grid power source inverter 2, its for by grid-connected for wind-driven generator to electrical network; Automatic generation amount controls (AGC) Coordination module 3, generated output time grid-connected for Forecast and control wind-driven generator.
See Fig. 2, described grid-connected voltage inverter comprises: rectification module 21, and the voltage commutation of wind-driven generator can be direct voltage by it, flow to energy-storage module or give copped wave module 22; Copped wave module 22, described direct voltage copped wave can be square-wave voltage by it; Sinusoidal filtration module 23, described square-wave voltage can be filtered into sinusoidal voltage by it; Voltage changing module 25, it can will export the changing voltage that can input electrical network, the preferred transformer of voltage changing module after described sinusoidal voltage transformation; Controllable switch module 24, it conducting or cut-off can input to the described changing voltage of electrical network.
Described grid-connected voltage inverter also comprises:
First voltage measurement module 29, it can measure the instantaneous voltage of electrical network 1, and exports the first voltage signal that represents this instantaneous voltage.
Second voltage measurement module 26, it can measure the instantaneous voltage of described changing voltage, and exports the second voltage signal that represents this instantaneous voltage.
The same period indicating module 28, it can input the instantaneous voltage of electrical network 1 and the instantaneous voltage of described changing voltage respectively, and the index signal same period of the exportable voltage representing electrical network 1 of indicating module 28 described same period and described changing voltage same period.
Driver module 27, its can input the instruction that described microprocessor 4 sends, described first voltage signal, described second voltage signal and described same period index signal, described driver module exportable one for controlling the drive control signal of the frequency of described square-wave voltage and the pulse duration exported to described copped wave module 22, and described driver module 27 exportable one for control the conducting of described controllable switch module 24 or cut-off switching drive signal to described controllable switch module 24, synchronous grid-connected with what realize with electrical network 1, and according to the command output power of microprocessor 4.
See Fig. 2, this wind generator system also comprises automatic generation amount and controls (AGC) Coordination module 3, generated output time grid-connected for Forecast and control wind-driven generator 9, and this module comprises:
Electric network data acquiring unit 31, can read grid measurement data in real time from grid dispatching center;
Electric network data analytic unit 32, can carry out data processing and Quality estimation to described grid measurement data, judge the control interval residing for electrical network;
Generated output coordination unit 33, basic point is obtained by real-time generation schedule, and calculate electrical network regulatory demand, and carry out regulating power distribution according to coordination control strategy, this generated output coordination unit is connected with microprocessor, and send instruction, to control power stage by microprocessor 4 to the driver module 27 of grid power source inverter 2.
Described coordination control strategy comprises urgent regulation strategy: when electrical network 1 regulatory demand is positioned at urgent district, wind-driven generator 9 participates in regulating immediately, make electrical network 1 return to normal condition as early as possible, wherein participate in regulating this wind-driven generator 9 of expression to regulate with other adjustable unit simultaneously.
When electrical network 1 regulatory demand is positioned at urgent district, wind-driven generator 9 participates in regulating immediately; If do not need urgent adjustment, then judge whether to need time urgent adjustment downwards.
When electrical network 1 not to need time promptly to regulate downwards, then judge whether to need time promptly upwards to regulate, if need adjustment, then wind-driven generator 9 participates in upwards regulating; If do not need time promptly upwards to regulate, continue to judge whether that needs normally upwards regulate.
The grid-connected control method of described grid power source inverter 2 comprises the steps:
Obtaining step: the instantaneous voltage value obtaining described changing voltage by described driver module 27 obtains a sub-voltage, the phase angle obtaining described changing voltage by described driver module 27 obtains a sub-phase angle, the frequency obtaining described changing voltage by described driver module 27 obtains a sub-frequency, the instantaneous voltage value obtaining line voltage by described driver module 27 obtains a female voltage, the phase angle obtaining line voltage by described driver module 27 obtains a parent phase parallactic angle, and the frequency obtaining line voltage by described driver module 27 obtains a female frequency;
Calculation procedure: the difference being calculated described sub-voltage and described female voltage by described driver module 27 obtains a voltage difference, the difference being calculated described sub-phase angle and described parent phase parallactic angle by described driver module 27 obtains a phase angle difference, and the difference being calculated described sub-frequency and described female frequency by described driver module 27 obtains a difference on the frequency;
Determining step: judge whether to receive index signal described same period by described driver module 27, by absolute value and a predeterminated frequency difference of the more described difference on the frequency of described driver module 27, by the more described voltage difference of described driver module 27 and a predeterminated voltage difference, if described changing voltage and line voltage same period, the absolute value of described difference on the frequency be less than described predeterminated frequency difference and the absolute value of described voltage difference to be less than described predeterminated voltage poor, then described driver module 27 controls described controllable switch module 27, make described changing voltage grid-connected in described electrical network, otherwise enter next step,
Regulation and control step: described phase angle difference is obtained a target frequency by PID arithmetic by described driver module 27, described driver module 27 adjusts described sub-frequency and equals described target frequency, and described driver module 27 adjusts described sub-voltage equals described female voltage, return determining step;
Power control step: driver module 27, according to the instruction of microprocessor 4, controls the duty ratio of copped wave module, in real time to control the demand that power stage meets electrical network.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, make some equivalent to substitute or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. a wind generator system, this system comprises:
Wind-driven generator, for Wind resource change is become electric energy, wherein this wind-driven generator adopts double feedback electric engine;
Wind-driven generator voltage, electric current, rotating speed sampling module, for detecting voltage, electric current and rotating speed when motor runs;
Energy module is unloaded in brake, for brake deceleration during motor stall;
Energy-storage module, comprises batteries, for when not grid-connected, and store electrical energy;
Wind-speed sample module, for detecting wind speed in real time;
Microprocessor, for controlling the operation of whole electricity generation system;
It is characterized in that, this system also comprises grid power source inverter, its for by grid-connected for wind-driven generator to electrical network, described grid power source inverter comprises:
Rectification module, the voltage commutation of wind-driven generator can be direct voltage by it;
Copped wave module, described direct voltage copped wave can be square-wave voltage by it;
Sinusoidal filtration module, described square-wave voltage can be filtered into sinusoidal voltage by it;
Voltage changing module, it can will export the changing voltage that can input electrical network after described sinusoidal voltage transformation;
Controllable switch module, it conducting or cut-off can input to the described changing voltage of electrical network;
Described grid power source inverter also comprises:
First voltage measurement module, it can measure the instantaneous voltage of electrical network, and exports the first voltage signal that represents this instantaneous voltage;
Second voltage measurement module, it can measure the instantaneous voltage of described changing voltage, and exports the second voltage signal that represents this instantaneous voltage;
The same period indicating module, it can receive the instantaneous voltage of electrical network and the instantaneous voltage of described changing voltage respectively, and the index signal same period of the exportable voltage representing electrical network of indicating module described same period and described changing voltage same period; With
Driver module, its can receive the instruction that described microprocessor sends, described first voltage signal, described second voltage signal and described same period index signal, described driver module exportable one for controlling the drive control signal of the frequency of described square-wave voltage and the pulse duration exported to described copped wave module, and described driver module exportable one for control described controllable switch module conducting or cut-off switching drive signal to described controllable switch module, synchronous grid-connected with what realize with electrical network, and according to the command output power of microprocessor;
This wind generator system also comprises automatic generation amount and controls (AGC) Coordination module, generated output time grid-connected for Forecast and control wind-driven generator, and this module comprises:
Electric network data acquiring unit, can read grid measurement data in real time from grid dispatching center;
Electric network data analytic unit, can carry out data processing and Quality estimation to described grid measurement data, judge the control interval residing for electrical network;
Generated output coordination unit, basic point is obtained by real-time generation schedule, and calculate electrical network regulatory demand, and carry out regulating power distribution according to coordination control strategy, this generated output coordination unit is connected with microprocessor, and send instruction, to control power stage by microprocessor to the driver module of grid power source inverter.
2. wind generator system as claimed in claim 1, it is characterized in that, described coordination control strategy comprises urgent regulation strategy: when electrical network regulatory demand is positioned at urgent district, wind-driven generator participates in regulating immediately, make electrical network return to normal condition as early as possible, wherein participate in regulating this wind-driven generator of expression and other adjustable unit to regulate simultaneously.
3. wind generator system as claimed in claim 1, is characterized in that, when electrical network regulatory demand is positioned at urgent district, wind-driven generator participates in regulating immediately; If do not need urgent adjustment, then judge whether to need time urgent adjustment downwards.
4. wind generator system as claimed in claim 1, is characterized in that, when electrical network does not need time promptly to regulate downwards, then judge whether to need time promptly upwards to regulate, if need to regulate, then wind-driven generator participation upwards regulates; If do not need time promptly upwards to regulate, continue to judge whether that needs normally upwards regulate.
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| CN201410393483.6A CN104135031B (en) | 2014-08-11 | 2014-08-11 | A kind of wind generator system |
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| CN201410393483.6A CN104135031B (en) | 2014-08-11 | 2014-08-11 | A kind of wind generator system |
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| CN102097814A (en) * | 2009-12-14 | 2011-06-15 | 谭宗享 | Grid-connected inverter system for wind power generation |
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| CN103746408A (en) * | 2014-01-28 | 2014-04-23 | 北京科东电力控制系统有限责任公司 | AGC (Automatic Generation Control) coordination control method of large-scale wind power |
| CN103925168A (en) * | 2014-04-02 | 2014-07-16 | 深圳市立创电源有限公司 | Wind power generation system capable of being started at low wind speed in auxiliary mode |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013013178A (en) * | 2011-06-28 | 2013-01-17 | Hitachi Ltd | Operation control system, operation control device, and operation control method for electric power system |
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- 2014-08-11 CN CN201410393483.6A patent/CN104135031B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097814A (en) * | 2009-12-14 | 2011-06-15 | 谭宗享 | Grid-connected inverter system for wind power generation |
| CN102158109A (en) * | 2011-03-17 | 2011-08-17 | 上海威特力焊接设备制造股份有限公司 | Photovoltaic synchronization inverter system |
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| CN203261115U (en) * | 2013-04-26 | 2013-10-30 | 武汉市泓承浩远电源有限责任公司 | Emergency uninterruptible power supply for wind power generation |
| CN103746408A (en) * | 2014-01-28 | 2014-04-23 | 北京科东电力控制系统有限责任公司 | AGC (Automatic Generation Control) coordination control method of large-scale wind power |
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