CN102828908B - Automatic control system for output power of wind power plant - Google Patents
Automatic control system for output power of wind power plant Download PDFInfo
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- CN102828908B CN102828908B CN201210299921.3A CN201210299921A CN102828908B CN 102828908 B CN102828908 B CN 102828908B CN 201210299921 A CN201210299921 A CN 201210299921A CN 102828908 B CN102828908 B CN 102828908B
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- power
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides an automatic control system for output power of a wind power plant, which comprises a wind power generation system, a medium voltage power transmission network, a booster station, a public power grid, a power sensor, a central controller and a power grid scheduling system, wherein the wind power generation system is the wind power plant which comprises a plurality of fans; the wind power generation system is connected with the medium voltage power transmission network; the voltage of the medium voltage power transmission network is boosted by the booster station and then is accessed to the public power grid; the power sensor is used for monitoring the output power of the wind power generation system and transmitting to the central controller; and the central controller is used for receiving an output power instruction of the power grid scheduling system, generating an output power variation rate signal according to the output power instruction and the monitored output power and sending the output power variation rate signal to the plurality of fans through a communication link located between the wind power generation system and the central controller, so as to change one or more running parameter of each fan. The automatic control system provided by the invention can ensure the capture of the maximum wind energy of the fans under the condition of meeting the power grid scheduling demand.
Description
Technical field
The present invention relates to technical field of wind power generation, particularly a kind of Power Output for Wind Power Field automatic control system.
Background technique
Utility network will regulate the output power of each electric power source on electrical network conventionally according to electrical network loading condition, wherein wind energy turbine set is also one of controlled plant.Wind energy turbine set has a fairly large number of wind-driven generator conventionally.The power stage of wind energy turbine set is subject to the wind regime at single blower fan place to affect larger.
Current, the northern area of China, due to less by electrical load, will be limited Power Output for Wind Power Field conventionally.Yet current wind energy turbine set for the common way of Power Limitation is, receive after the instruction of dispatching of power netwoks, by manually stopping blower fan, carry out the output power of regulating wind power field.The method can meet the requirement of dispatching of power netwoks to a certain extent.But start and stop are larger for the impact of wind-driven generator (abbreviation blower fan) group load frequently, meanwhile, the wind energy that also can affect blower fan is caught and the degree electricity cost of wind energy turbine set.
Therefore, need a kind of Power Output for Wind Power Field automatic control system, in the situation that meeting dispatching of power netwoks requirement, guarantee the maximal wind-energy capture of blower fan.
Summary of the invention
The present invention proposes a kind of Power Output for Wind Power Field automatic control system, can according to instruction, automatically regulate the output power of blower fan, guarantees the maximal wind-energy capture of blower fan in the situation that meeting dispatching of power netwoks requirement.The technical solution adopted in the present invention is specifically achieved in that
The invention provides a kind of Power Output for Wind Power Field automatic control system, it comprises: wind-power generating system, middle pressure power transmission network, booster stations, utility network, power sensor, central control unit and power network dispatching system, described wind-power generating system is the wind energy turbine set that comprises a plurality of blower fans, described wind-power generating system is connected with described middle pressure power transmission network, the described utility network of access after described booster stations promote the voltage of described middle pressure power transmission network, described power sensor is monitored the output power of described wind-power generating system and is transferred to described central control unit, described central control unit receives the output power instruction of described power network dispatching system, according to the output power of output power instruction and monitoring, produce output power variance ratio signal, thereby send to described a plurality of blower fan to change one or more Operational Limitss of every Fans output power variance ratio signal by the communication link between described wind-power generating system and described central control unit.
Preferably, described blower fan comprises blade, generator and transformer.
Preferably, described output power variance ratio amplitude is less than Power Output for Wind Power Field variance ratio and sets, and the power variation rate that is also less than separate unit blower fan is set.
Preferably, described fan operation parameter comprises generator power, generator torque, blade pitch.
Preferably, described power sensor is measured the output power of wind energy turbine set and is installed on the outlet of described booster stations.
Preferably, described central control unit is by described communication link and single described blower fan communication.
Preferably, described central control unit is by described communication link and described power network dispatching system communication.
Preferably, described communication link can be: Internet, Ethernet, GSM/CDMA.
Preferably, also comprise blower fan control system, its received output power variance ratio signal is also adjusted and is controlled parameter.
Preferably, below rated power, by regulator generator torque instruction with regulation output power; More than rated power, by regulating pitch instruction with regulation output power.
Power Output for Wind Power Field automatic control system of the present invention, can regulate the output power of blower fan automatically according to instruction, guarantee the maximal wind-energy capture of blower fan in the situation that meeting dispatching of power netwoks requirement.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Power Output for Wind Power Field automatic control system of the embodiment of the present invention;
Fig. 2 is that the Power Output for Wind Power Field automatic control system output power variance ratio of the embodiment of the present invention is controlled schematic diagram;
Fig. 3 is the structural representation of the double-fed blower fan group in the Power Output for Wind Power Field automatic control system of the embodiment of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, it will be more clear making above-mentioned and other object of the present invention, Characteristics and advantages.In whole accompanying drawings, identical reference character is indicated identical part.Deliberately do not draw in proportion accompanying drawing, focus on illustrating purport of the present invention.
Below in conjunction with accompanying drawing, the specific embodiment of the icing control gear of wind power generating set of the present invention and controlling method is elaborated.
Fig. 1 is the structural representation of the Power Output for Wind Power Field automatic control system of the embodiment of the present invention, Fig. 2 is that the Power Output for Wind Power Field automatic control system output power variance ratio of the embodiment of the present invention is controlled schematic diagram, Fig. 3 is the structural representation of the double-fed blower fan group in the Power Output for Wind Power Field automatic control system of the embodiment of the present invention, in conjunction with Fig. 1 to Fig. 3, the Power Output for Wind Power Field automatic control system of the specific embodiment of the invention, it comprises: wind-power generating system, middle pressure power transmission network 6, booster stations 7, utility network 8, power sensor 9, central control unit 10 and power network dispatching system 11, wind-power generating system is the wind energy turbine set 1 that comprises a plurality of blower fans 2, wind-power generating system is connected with middle pressure power transmission network 6, access utility network 8 after booster stations 7 promote the voltage of middle pressure power transmission network 6, the output power of power sensor 9 monitoring wind-power generating systems is also transferred to central control unit 10, central control unit 10 receives the output power instruction of power network dispatching system 11, according to the output power of output power instruction and monitoring, produce output power variance ratio signal, thereby send to a plurality of blower fans 2 to change one or more Operational Limitss of every Fans 2 output power variance ratio signal by the communication link 12 between wind-power generating system and central control unit 10.
In the specific embodiment of the invention, blower fan 2 comprises blade 3, generator 4 and transformer 5, output power variance ratio amplitude is less than Power Output for Wind Power Field variance ratio and sets, also the power variation rate that is less than separate unit blower fan is set, the Operational Limits of blower fan 2 comprises generator power, generator torque, blade pitch, and power sensor 9 is measured the output power of wind energy turbine set 1 and is installed on the outlet of booster stations 7.Central control unit 10 is by communication link 12 and single blower fan 2, power network dispatching system 11 communications, and communication link 12 can be: Internet, Ethernet, GSM/CDMA.。In the Power Output for Wind Power Field automatic control system of the specific embodiment of the invention, also comprise blower fan control system 20, its received output power variance ratio signal is also adjusted and is controlled parameter.Preferably, below rated power, by regulator generator torque instruction with regulation output power; More than rated power, by regulating pitch instruction with regulation output power.
The electric energy that wind-driven generator 2 produces is pressed power transmission network 6 in accessing after transformer 5.Access utility network 8 after booster stations 7 promote the voltage of middle pressure power transmission network 6.
In the invention process, wind energy turbine set 1 comprises a wind field control system, and it is comprised of a central control unit 10 and power sensor 9.Power sensor 9 is for measuring the output power of wind energy turbine set 1.Central control unit 10 is for monitoring the output power variance ratio of wind energy turbine set 1.Central control unit 10 receives the output power instruction that comes from power network dispatching system 11 by communication.Central control unit 10 is by communication link 12 and single wind-driven generator communication.
As shown in Figure 2, power sensor 9 is measured the real-time output power (P of wind energy turbine set 1
n), according to the output power instruction (P of power network dispatching system 11
0), at the node 13 error of calculations e of place, error e obtains power variation rate through derivative unit 14.Through the amplitude limiter 15 power variation rate (R that causes the demand
1).Amplitude (the R of amplitude limiter
f) be maximum power variation rate or the given maximum power variation rate of electrical network of wind energy turbine set 1.Demand power variance ratio R
1pass through P
icontrolling unit 16 and amplitude limiter 17, produce power variation rate signal (R
2).Power variation rate signal (R
2) by each Fans being applied in wind energy turbine set 1.Amplitude (the R of amplitude limiter 17
t) be blower fan maximum power variation rate, this value is generally blower fan MANUFACTURER and sets.
As shown in Figure 3, generator comprises staor winding 22 and rotor winding 21.Wherein staor winding 22 accesses electrical networks 6, rotor winding 21 access current transformers 19.Current transformer 19 provides excitation to rotor winding 21, by changing rotor winding 21 excitations, controls power generator air gap torque.The excitation that current transformer 19 provides derives from the torque instruction that blower fan control system 20 sends.Torque instruction is the function of generator speed normally, adjusts torque instruction and can make blower fan obtain optimum performance under current wind speed.As everyone knows, generated output power is the function of generator speed and generator torque.In the definite situation of rotating speed, can adjust torque to keep generator power variance ratio.Blower fan control system 20 can be by adjusting pitch to control generator speed.In the specific embodiment of the invention, below rated power, regulator generator torque is with regulation output power; More than rated power, adjust pitch with regulator generator rotating speed, final regulation output power.
In the specific embodiment of the invention, the power variation rate signal (R that variance ratio controlling method produces
2) send to every Fans of wind energy turbine set 1, blower fan control system 20 received power variance ratio signal (R
2), and adjust and control parameter.Below rated power, by regulator generator torque instruction with regulation output power; More than rated power, by regulating pitch instruction with regulation output power.
In the Power Output for Wind Power Field automatic control system of the specific embodiment of the invention, by the output power of Power Output for Wind Power Field automatic controlling system wind energy turbine set, make it meet the requirement of dispatching of power netwoks.Power Output for Wind Power Field automatic control system receives the output power instruction that comes from power network dispatching system by communication, then to blower fan, send variance ratio signal to change fan operation parameter and to control its output power.
Power Output for Wind Power Field automatic control system of the present invention, can regulate the output power of blower fan automatically according to instruction, guarantee the maximal wind-energy capture of blower fan in the situation that meeting dispatching of power netwoks requirement.
In above description, a lot of details have been set forth so that fully understand the present invention.But above description is only preferred embodiment of the present invention, the present invention can implement to be much different from alternate manner described here, so the present invention is not subject to the restriction of disclosed concrete enforcement above.Any skilled personnel are not departing from technical solution of the present invention scope situation simultaneously, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (9)
1. a Power Output for Wind Power Field automatic control system, it is characterized in that, comprise: wind-power generating system, middle pressure power transmission network, booster stations, utility network, power sensor, central control unit and power network dispatching system, described wind-power generating system is the wind energy turbine set that comprises a plurality of blower fans, described wind-power generating system is connected with described middle pressure power transmission network, the described utility network of access after described booster stations promote the voltage of described middle pressure power transmission network, described power sensor is monitored the output power of described wind-power generating system and is transferred to described central control unit, described central control unit receives the output power instruction of described power network dispatching system, according to the output power of output power instruction and monitoring, produce output power variance ratio signal, thereby send to described a plurality of blower fan to change one or more Operational Limitss of every Fans output power variance ratio signal by the communication link between described wind-power generating system and described central control unit, described Power Output for Wind Power Field automatic control system also comprises blower fan control system, its received output power variance ratio signal is also adjusted and is controlled parameter.
2. Power Output for Wind Power Field automatic control system according to claim 1, is characterized in that, described blower fan comprises blade, generator and transformer.
3. Power Output for Wind Power Field automatic control system according to claim 1, is characterized in that, described output power variance ratio amplitude is less than Power Output for Wind Power Field variance ratio and sets, and the power variation rate that is also less than separate unit blower fan is set.
4. Power Output for Wind Power Field automatic control system according to claim 1, is characterized in that, described fan operation parameter comprises generator power, generator torque, blade pitch.
5. Power Output for Wind Power Field automatic control system according to claim 1, is characterized in that, described power sensor is measured the output power of wind energy turbine set and is installed on the outlet of described booster stations.
6. Power Output for Wind Power Field automatic control system according to claim 1, is characterized in that, described central control unit is by described communication link and single described blower fan communication.
7. Power Output for Wind Power Field automatic control system according to claim 1, is characterized in that, described central control unit is by described communication link and described power network dispatching system communication.
8. Power Output for Wind Power Field automatic control system according to claim 7, is characterized in that, described communication link can be: Internet, Ethernet, GSM/CDMA.
9. Power Output for Wind Power Field automatic control system according to claim 1, is characterized in that, below rated power, by regulator generator torque instruction with regulation output power; More than rated power, by regulating pitch instruction with regulation output power.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299921.3A CN102828908B (en) | 2012-08-22 | 2012-08-22 | Automatic control system for output power of wind power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210299921.3A CN102828908B (en) | 2012-08-22 | 2012-08-22 | Automatic control system for output power of wind power plant |
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| CN102828908A CN102828908A (en) | 2012-12-19 |
| CN102828908B true CN102828908B (en) | 2014-07-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1873219A (en) * | 2005-06-03 | 2006-12-06 | 通用电气公司 | System and method for operating a wind farm under high wind speed conditions |
| CN101630849A (en) * | 2009-07-30 | 2010-01-20 | 山东鼎鑫电气科技有限公司 | Dynamic reactive power compensation wind power generation box-type substation |
| CN102118037A (en) * | 2009-12-31 | 2011-07-06 | 通用电气公司 | Systems and apparatus relating to wind turbine electrical control and operation |
| CN202900535U (en) * | 2012-08-22 | 2013-04-24 | 南京风电科技有限公司 | Wind power plant output power automatic control system |
-
2012
- 2012-08-22 CN CN201210299921.3A patent/CN102828908B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1873219A (en) * | 2005-06-03 | 2006-12-06 | 通用电气公司 | System and method for operating a wind farm under high wind speed conditions |
| CN101630849A (en) * | 2009-07-30 | 2010-01-20 | 山东鼎鑫电气科技有限公司 | Dynamic reactive power compensation wind power generation box-type substation |
| CN102118037A (en) * | 2009-12-31 | 2011-07-06 | 通用电气公司 | Systems and apparatus relating to wind turbine electrical control and operation |
| CN202900535U (en) * | 2012-08-22 | 2013-04-24 | 南京风电科技有限公司 | Wind power plant output power automatic control system |
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Addressee: Patent manager of Nanjing Wind Power Technology Co., Ltd. Document name: Notification that Application Deemed not to be Proposed |
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Address after: Ningyuan Economic Development Zone Binjiang Road, Jiangning District of Nanjing City, Jiangsu province 211100 Applicant after: Nanjing Wind Power Technology Co., Ltd. Address before: 211100 Jiangsu city of Nanjing province Jiangning Science Park Yuehua road and Duangong Road intersection Applicant before: Nanjing Wind Power Technology Co., Ltd. |
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