CN102457195A - Power grid failure traversing system and method of 2 MW and more than 2 MW double-fed wind generating set complete machine - Google Patents
Power grid failure traversing system and method of 2 MW and more than 2 MW double-fed wind generating set complete machine Download PDFInfo
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- CN102457195A CN102457195A CN2010105289217A CN201010528921A CN102457195A CN 102457195 A CN102457195 A CN 102457195A CN 2010105289217 A CN2010105289217 A CN 2010105289217A CN 201010528921 A CN201010528921 A CN 201010528921A CN 102457195 A CN102457195 A CN 102457195A
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Abstract
The invention provides a power grid failure traversing system and method of a 2 MW and more than 2 MW double-fed wind generating set complete machine. The system comprises a convertor system, a controller system, a pitch system and a torque limiter. The method comprises the following steps: detecting the operation condition of a power grid; judging whether a failure appears: if not, returning to the step S1, and if so, dynamically switching to a failure traversing operation mode; detecting the operation condition of the power grid; and judging whether the failure recovers: if not, returning to the step S7, if so, recovering a normal operation state, and then returning to the S1. According to the invention, while the protection actions of each part in a failure period are ensured, the conjugation problem of an integrated system is solved, no-network operation in the failure period is realized, the power grid is supported, and the service life of a machine set is prolonged; and the failure rate of the machine set is reduced, thereby greatly reducing the maintenance cost of the machine set.
Description
Technical field:
The present invention relates to a kind of electric network fault ride through system and method for wind turbine generator complete machine.
Technical background:
Present stage, wind power generation was because the new forms of energy characteristic of its environmental protection had obtained development at full speed in recent years at home, and large-scale wind power plant gradually construction at home gets up.
The double-feedback aerogenerator group is the type commonly used of wind-powered electricity generation industry now; The stator side of its double fed induction generators (DFIG) directly links to each other with electrical network; Rotor-side is through indirect AC convertor and electrical network coupling; Owing to be not to be coupled through current transformer fully between its generator and the electrical network,, electrical network can produce following problem when breaking down:
Electric network fault causes the wind-driven generator set end voltage to fall, and causes the generator unit stator electric current to increase.
Because the close coupling between double fed induction generators rotor and the stator, the stator current that increases fast can cause rotor current sharply to rise.
Because the wind-driven generator governing speed is slower; The wind energy of fault wind-driven generator in early stage absorption can obviously not reduce; And generating set reduces owing to set end voltage, can not be normally to the electrical network transmission of electric energy, and promptly some energy can't be imported electrical network; These energy are digested by internal system, will cause a series of problems such as the charging of current transformer internal capacitance, direct voltage raise fast, rotor acceleration, electromagnetic torque sudden change.The problems referred to above cause the damage of components and parts in the converter system easily, reduce blower fan useful life, simultaneously, because blower fan is difficult in maintenance, will improve maintenance cost greatly.
For common double-fed wind turbine generator; Generally do not possess the solution that electric network fault passes through, perhaps have only part parts such as current transformer to do some hardware or the software protection measure of reply electric network fault, this localised protection measure; Can only ensure the safety of part parts; Can not guarantee the global facility fitness of double-fed unit when electric network fault, reliability is low, can't guarantee to realize that electric network fault passes through characteristic.
When electrical network breaks down, even be smaller fault, be the protection wind power plant, wind turbine generator is also wanted and grid disconnection.Along with wind-driven generator capacity, wind energy turbine set scale are increasing; If the large-scale wind power unit is from grid disconnection; Wind turbine generator has just lost the enabling capabilities to line voltage, and this possibly cause serious chain reaction, the stable operation of electrical network is caused have a strong impact on.
Summary of the invention:
The present invention passes through a difficult problem in the face of double-fed wind power generator group electric network fault, to 2MW and the exclusive operation characteristic of above double-fed wind power generator group, has proposed the electric network fault ride through system and the method for 2MW and above double-fed fan motor unit complete machine.
Fault ride through system according to the invention and method are done optimal design to wind turbine generator converter system, controller system, shaft coupling, generator and pitch-controlled system; Except guaranteeing that each parts itself possesses the protection action between age at failure; Emphasis has solved the matching problem of total system, realizes each the parts collaborative work of double-fed fan motor unit, dynamically switches to fault in the short period of time and passes through mode of operation; Make the wind-powered electricity generation unit really realize the not off-grid operation between age at failure; The stable normal power that recovers is fast exported after the fault, and reliability is high, realizes the supporting role to electrical network.
In addition; Fault ride through system according to the invention through the control of pitch-controlled system is reduced wind speed round, adds the torque sudden change kurtosis that limiter of moment on the upper coupling produces during can fault restriction during electric network fault passes through, finally make unit avoid the vibration significantly of torque; In conjunction with the safeguard measure of native system to current transformer and generator; Can prolong unit useful life, fall end unit failure rate, thereby reduce the unit maintenance cost greatly.
The technical scheme that realizes above-mentioned purpose is:
The electric network fault ride through system of one of the present invention: 2MW and above double-fed wind power generator group complete machine comprises converter system, controller system, pitch-controlled system, limiter of moment.
In the above-mentioned electric network fault ride through system, described converter system comprises with the current transformer direct current surveys unloading unit, the active crowbar that links to each other with inverter controller respectively, current transformer, the UPS electric power system that links to each other, wherein:
Unloading unit is used to prevent that electric voltage dropping from causing the current transformer dc voltage to raise;
Active crowbar also links to each other with current transformer rotor-side and generator amature, is used to prevent the generator amature overcurrent;
The UPS electric power system also links to each other with the switch that is incorporated into the power networks, be used for electric network fault during the short time supply power to the inverter controller and the switch that is incorporated into the power networks, the switch that guarantees to be incorporated into the power networks does not break off, and keeps being connected between blower fan and electrical network;
Inverter controller also links to each other with controller system, is used for sending fault-signal and receiving restoring signal to controller system.
In the above-mentioned electric network fault ride through system; Described controller system links to each other with change oar controller with inverter controller respectively; Be used for receiving fault-signal and sending restoring signal to inverter controller; Become oar to becoming oar controller transmitting control commands with the control wind wheel simultaneously, and carry out the failure logging during electric network fault passes through.
In the above-mentioned electric network fault ride through system, described controller system includes the UPS electric power system, is used for during fault is passed through, supplying power to controller system.
In the above-mentioned electric network fault ride through system, described pitch-controlled system includes storage battery, becomes the oar controller, wherein:
Storage battery is used for during fault is passed through to becoming the power supply of oar controller;
Become the oar controller, link to each other, be used to receive the control command that controller system sends, carry out the action of phase strain oar, regulate wind speed round with controller system.
In the above-mentioned electric network fault ride through system, described limiter of moment is located on the shaft coupling, can not influence gear box to guarantee the instantaneous over torque that produces during the electric network fault.
In the above-mentioned electric network fault ride through system, the setting slipping torque of described limiter of moment be rated moment 1.5-2 doubly, concrete numerical value by the double-fed fan motor unit separately operating characteristic calculate.
The electric network fault traversing method of the present invention's two: 2MW and above double-fed wind power generator group complete machine wherein, may further comprise the steps:
Step S1: converter system detection of grid operation conditions;
Step S2: converter system judges whether electrical network breaks down:
If promptly electrical network breaks down, then get into step S3;
If not, promptly electrical network does not break down, and then returns step S1;
Step S3: converter system, controller system switch to the UPS electric power system and supply power, and pitch-controlled system switches to storage battery and supplies power, and keep the normal operation of blower fan networking and fault ride through system;
Step S4: converter system is opened active crowbar and unloading unit, protection current transformer and generator, and inverter controller sends fault-signal to controller system;
Step S5: controller system begins the electric network fault record simultaneously to the pitch-controlled system transmitting control commands;
Step S6: the pitch-controlled system responsing control command, carry out the action of phase strain oar;
Step S7: converter system detection of grid operation conditions;
Step S8: judge whether electric network fault recovers:
If promptly electric network fault recovers, and then gets into step S9;
If not, promptly electric network fault does not recover, and then returns step S7;
Step S9: converter system, controller system, pitch-controlled system recover normal power supply;
Step S10: in the converter system, close active crowbar and unloading unit, send restoring signal, regulate the excitation damping system, make power recover arm's length standard to controller system;
Step S11: controller system finishes the electric network fault record simultaneously to the pitch-controlled system transmitting control commands;
Step S12: the pitch-controlled system responsing control command, carry out the action of phase strain oar, return step S1 then.
In the electric network fault ride through system and method for 2MW of the present invention and above double-fed wind power generator group complete machine; Electric network fault also can be detected by controller system; And, also should belong to this patent protection range by this method to converter system and pitch-controlled system transmission fault-signal and restoring signal.
In addition, pitch-controlled system also can directly be controlled by inverter controller, thereby carries out the corresponding oar action that becomes, and this method also should belong to this patent protection range.
Description of drawings:
Fig. 1 is one of the present invention's a structural representation;
Fig. 2 is the present invention's two a flow chart.
Embodiment:
To combine accompanying drawing that the present invention is described further below.
See also Fig. 1, one of the present invention's the 2MW and the electric network fault ride through system of above double-fed wind power generator group complete machine have been shown among the figure, it comprises converter system, controller system, pitch-controlled system, limiter of moment, wherein:
Converter system; Comprise with the current transformer direct current and survey unloading unit, the active crowbar that links to each other with inverter controller respectively, current transformer, the UPS electric power system that links to each other; The UPS electric power system also links to each other with the switch that is incorporated into the power networks; To guarantee that blower fan normally is connected with electrical network between age at failure, active crowbar and unloading unit are used to protect generator and current transformer, and inverter controller can send fault-signal and receive restoring signal to controller system;
Controller system; Link to each other with change oar controller with inverter controller respectively; Be used for receiving fault-signal and sending restoring signal, become oar to becoming oar controller transmitting control commands with the control wind wheel simultaneously, and carry out the failure logging during electric network fault passes through to inverter controller.
Pitch-controlled system links to each other with controller system, is used to receive the control command that controller system sends, and carries out the action of phase strain oar, regulates wind speed round.
Limiter of moment is arranged on the shaft coupling, can not influence gear box to guarantee the instantaneous over torque that produces during the electric network fault.
See also Fig. 2, the present invention's two the 2MW and the electric network fault traversing method of above double-fed wind power generator group complete machine be shown among the figure, wherein, may further comprise the steps:
Step S1: converter system detection of grid operation conditions;
Step S2: converter system judges whether electrical network breaks down:
If promptly electrical network breaks down, then get into step S3;
If not, promptly electrical network does not break down, and then returns step S1;
Step S3: converter system, controller system switch to the UPS electric power system and supply power, and pitch-controlled system switches to storage battery and supplies power, and keep the normal operation of blower fan networking and fault ride through system;
Step S4: converter system is opened active crowbar and unloading unit, protection current transformer and generator, and inverter controller sends fault-signal to controller system;
Step S5: controller system begins the electric network fault record simultaneously to the pitch-controlled system transmitting control commands;
Step S6: the pitch-controlled system responsing control command, carry out the action of phase strain oar;
Step S7: converter system detection of grid operation conditions;
Step S8: judge whether electric network fault recovers:
If promptly electric network fault recovers, and then gets into step S9;
If not, promptly electric network fault does not recover, and then returns step S7;
Step S9: converter system, controller system, pitch-controlled system recover normal power supply;
Step S10: in the converter system, close active crowbar and unloading unit, send restoring signal, regulate the excitation damping system, make power recover arm's length standard to controller system;
Step S11: controller system finishes the electric network fault record simultaneously to the pitch-controlled system transmitting control commands;
Step S12: the pitch-controlled system responsing control command, carry out the action of phase strain oar, return step S1 then.
Though through combining specific embodiment to describe to the present invention, for skilled personage in the present technique field, according to substituting of making of the narration of preceding text, revise with variation will be conspicuous.Therefore, substitute, revise and change the spirit that falls into claim of the present invention when interior, should be included among the present invention with scope such.
Claims (8)
1.2MW reach the electric network fault ride through system of above double-fed wind power generator group complete machine, it is characterized in that: comprise converter system, controller system, pitch-controlled system, limiter of moment.
2. electric network fault ride through system according to claim 1; It is characterized in that: described converter system comprises with the current transformer direct current surveys unloading unit, the active crowbar that links to each other with inverter controller respectively, current transformer, the UPS electric power system that links to each other, wherein:
Unloading unit is used to prevent that electric voltage dropping from causing the current transformer dc voltage to raise;
Active crowbar also links to each other with current transformer rotor-side and generator amature, is used to prevent the generator amature overcurrent;
The UPS electric power system also links to each other with the switch that is incorporated into the power networks, be used for electric network fault during the short time supply power to the inverter controller and the switch that is incorporated into the power networks, the switch that guarantees to be incorporated into the power networks does not break off, and keeps being connected between blower fan and electrical network;
Inverter controller also links to each other with controller system, is used for sending fault-signal and receiving restoring signal to controller system.
3. electric network fault ride through system according to claim 1; It is characterized in that: described controller system links to each other with change oar controller with inverter controller respectively; Be used for receiving fault-signal and sending restoring signal to inverter controller; Become oar to becoming oar controller transmitting control commands with the control wind wheel simultaneously, and carry out the failure logging during electric network fault passes through.
4. electric network fault ride through system according to claim 1 is characterized in that: described controller system includes the UPS electric power system, is used for during fault is passed through, supplying power to controller system.
5. electric network fault ride through system according to claim 1 is characterized in that: described pitch-controlled system includes storage battery, becomes the oar controller, wherein:
Storage battery is used for during fault is passed through to becoming the power supply of oar controller;
Become the oar controller, link to each other, be used to receive the control command that controller system sends, carry out the action of phase strain oar, regulate wind speed round with controller system.
6. electric network fault ride through system according to claim 1 is characterized in that: described limiter of moment is located on the shaft coupling, can not influence gear box to guarantee the instantaneous over torque that produces during the electric network fault.
7. the electric network fault traversing method of 2MW according to claim 1 and above double-fed wind power generator group complete machine is characterized in that: may further comprise the steps:
Step S1: converter system detection of grid operation conditions;
Step S2: converter system judges whether electrical network breaks down:
If promptly electrical network breaks down, then get into step S3;
If not, promptly electrical network does not break down, and then returns step S1;
Step S3: converter system, controller system switch to the UPS electric power system and supply power, and pitch-controlled system switches to storage battery and supplies power, and keep the normal operation of blower fan networking and fault ride through system;
Step S4: converter system is opened active crowbar and unloading unit, protection current transformer and generator, and inverter controller sends fault-signal to controller system;
Step S5: controller system begins the electric network fault record simultaneously to the pitch-controlled system transmitting control commands;
Step S6: the pitch-controlled system responsing control command, carry out the action of phase strain oar;
Step S7: converter system detection of grid operation conditions;
Step S8: judge whether electric network fault recovers:
If promptly electric network fault recovers, and then gets into step S9;
If not, promptly electric network fault does not recover, and then returns step S7;
Step S9: converter system, controller system, pitch-controlled system recover normal power supply;
Step S10: in the converter system, close active crowbar and unloading unit, send restoring signal, regulate the excitation damping system, make power recover arm's length standard to controller system;
Step S11: controller system finishes the electric network fault record simultaneously to the pitch-controlled system transmitting control commands;
Step S12: the pitch-controlled system responsing control command, carry out the action of phase strain oar, return step S1 then.
8. limiter of moment according to claim 6 is characterized in that: the setting slipping torque of described limiter of moment be rated moment 1.5-2 doubly, concrete numerical value by the double-fed fan motor unit separately operating characteristic calculate.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738829A (en) * | 2012-06-30 | 2012-10-17 | 广东明阳风电产业集团有限公司 | Topological structure and control method for variable-frequency control wind power generation system |
| CN102780223A (en) * | 2012-07-31 | 2012-11-14 | 华锐风电科技(集团)股份有限公司 | Monitoring system and monitoring method for low voltage ride through of wind turbine |
| CN102790406A (en) * | 2012-08-07 | 2012-11-21 | 南京飓能电控自动化设备制造有限公司 | Doubly-fed converter with reliable low-voltage ride-through capacity |
| CN110082613A (en) * | 2019-05-27 | 2019-08-02 | 上海电气风电集团有限公司 | A kind of main circuit of wind power converter connection state detection system and detection method |
| CN110389645A (en) * | 2019-06-14 | 2019-10-29 | 湖南中联重科智能技术有限公司 | Safety shutdown method, apparatus, limiter of moment and engineering machinery |
| CN110571859A (en) * | 2019-10-10 | 2019-12-13 | 重庆大学 | method for improving grid-connected operation capacity of double-fed wind turbine generator under power grid fault |
| CN111509773A (en) * | 2020-04-24 | 2020-08-07 | 浙江运达风电股份有限公司 | Voltage source type wind turbine generator fault ride-through control method suitable for weak power grid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237142A (en) * | 2007-12-11 | 2008-08-06 | 上海电力学院 | Failure control method for winding line rotor wind power generator system |
| CN101299540A (en) * | 2007-04-30 | 2008-11-05 | 国网南京自动化研究院 | Apparatus for implementing low voltage cross-over of wind generator set |
| CN201284799Y (en) * | 2008-10-24 | 2009-08-05 | 开天传动技术(上海)有限公司 | Coupling for high speed shaft of aerogenerator |
| CN101651330A (en) * | 2009-09-23 | 2010-02-17 | 哈尔滨九洲电气股份有限公司 | Crowbar protecting device of double-feed wind-electricity converter |
-
2010
- 2010-11-02 CN CN2010105289217A patent/CN102457195A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299540A (en) * | 2007-04-30 | 2008-11-05 | 国网南京自动化研究院 | Apparatus for implementing low voltage cross-over of wind generator set |
| CN101237142A (en) * | 2007-12-11 | 2008-08-06 | 上海电力学院 | Failure control method for winding line rotor wind power generator system |
| CN201284799Y (en) * | 2008-10-24 | 2009-08-05 | 开天传动技术(上海)有限公司 | Coupling for high speed shaft of aerogenerator |
| CN101651330A (en) * | 2009-09-23 | 2010-02-17 | 哈尔滨九洲电气股份有限公司 | Crowbar protecting device of double-feed wind-electricity converter |
Non-Patent Citations (1)
| Title |
|---|
| 杨涛等: "双馈变速风电机组低电压穿越控制方案的研究", 《现代电力》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738829A (en) * | 2012-06-30 | 2012-10-17 | 广东明阳风电产业集团有限公司 | Topological structure and control method for variable-frequency control wind power generation system |
| CN102738829B (en) * | 2012-06-30 | 2015-06-17 | 广东明阳风电产业集团有限公司 | Topological structure of variable frequency control wind power generation system |
| CN102780223A (en) * | 2012-07-31 | 2012-11-14 | 华锐风电科技(集团)股份有限公司 | Monitoring system and monitoring method for low voltage ride through of wind turbine |
| CN102780223B (en) * | 2012-07-31 | 2015-11-25 | 华锐风电科技(集团)股份有限公司 | A kind of supervisory system and method being applied to LVRT Capability of Wind Turbine Generator |
| CN102790406A (en) * | 2012-08-07 | 2012-11-21 | 南京飓能电控自动化设备制造有限公司 | Doubly-fed converter with reliable low-voltage ride-through capacity |
| CN102790406B (en) * | 2012-08-07 | 2014-10-01 | 南京飓能电控自动化设备制造有限公司 | Doubly-fed converter with reliable low-voltage ride-through capacity |
| CN110082613A (en) * | 2019-05-27 | 2019-08-02 | 上海电气风电集团有限公司 | A kind of main circuit of wind power converter connection state detection system and detection method |
| CN110389645A (en) * | 2019-06-14 | 2019-10-29 | 湖南中联重科智能技术有限公司 | Safety shutdown method, apparatus, limiter of moment and engineering machinery |
| CN110571859A (en) * | 2019-10-10 | 2019-12-13 | 重庆大学 | method for improving grid-connected operation capacity of double-fed wind turbine generator under power grid fault |
| CN110571859B (en) * | 2019-10-10 | 2021-02-26 | 重庆大学 | Method for improving grid-connected operation capacity of double-fed wind turbine generator under power grid fault |
| CN111509773A (en) * | 2020-04-24 | 2020-08-07 | 浙江运达风电股份有限公司 | Voltage source type wind turbine generator fault ride-through control method suitable for weak power grid |
| CN111509773B (en) * | 2020-04-24 | 2021-08-17 | 浙江运达风电股份有限公司 | Voltage source type wind turbine generator fault ride-through control method suitable for weak power grid |
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