CN103094917A - Low voltage ride through control method for full-power high-speed permanent synchronous fan - Google Patents
Low voltage ride through control method for full-power high-speed permanent synchronous fan Download PDFInfo
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- CN103094917A CN103094917A CN2012104924531A CN201210492453A CN103094917A CN 103094917 A CN103094917 A CN 103094917A CN 2012104924531 A CN2012104924531 A CN 2012104924531A CN 201210492453 A CN201210492453 A CN 201210492453A CN 103094917 A CN103094917 A CN 103094917A
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- low voltage
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- blower fan
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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
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention relates to the running control technique of wind power generation equipment, in particular to a low voltage ride through control method for a full-power high-speed permanent synchronous fan. The method is that mechanical load impact on a machine set when a power grid is in fault can be reduced by reducing machine side converter direct torque control reference preset orders Te* on the motor side of a wind power generation system, and simultaneously a crowbar circuit with an energy storage link is arranged on the direct current side to absorb and store redundant energy when the power grid is in fault to achieve low voltage ride through of the fan. The method can reduce load of a wind power generation set when the power grid is in fault, enables the machine set to run safely and stably and can absorb, store and utilize redundant energy when the power grid is in fault.
Description
Technical field
The present invention relates to wind-force and send out the operation control technology of equipment, specifically the low voltage traversing control method of the synchronous blower fan of a kind of total power high-speed permanent magnetic.
Background technology
Wind energy can effectively solve the problems such as fossil energy exhaustion, thereby closely obtain using more and more widely as a kind of regenerative resource.Wind-powered electricity generation proportion in whole power system power supply is increasing at present, and various countries have in succession put into effect the laws and regulations requirement blower fan and possess certain ride-through capability (low voltage crossing) under electric network fault.
With the high-speed permanent magnetic blower fan of total power frequency converter because its superior low voltage crossing performance has extensive utilization in the wind-powered electricity generation unit.In the electric network fault situation, when adopting Strategy of Direct Torque Control, usually directly reduces with reference to given torque instruction by the motor side current transformer, and reach and reduce the low voltage crossing that output of a generator can realize unit.But the fan operation operating mode is badly considered the blower fan fatigue wear, and this is very large for the impact of unit mechanical load if blower fan adopts the given mode of reduction torque reference under electric network fault always, is unfavorable for that blower fan is in the safe operation of cycle designed life.
By increasing crowbar circuit in system's DC side, absorb unnecessary energy under electric network fault, also can help system realize low voltage crossing.Patent documentation " a kind of control method that improves wind power system unbalanced fault ride-through capability " (application number: 2,011 10181264.8) for example, 201120439682.8) etc. " direct current unloading circuit of direct-driven wind power converter " (application number: the technical scheme that proposes, but the just simple energy that blower fan is unnecessary of technique scheme directly consumes, and does not consider the impact of unit load and the optimal control of DC side crowbar circuit combination.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of can reduce wind-powered electricity generation unit load, unit operation safety and stability when electric network fault, can absorb and the memory by using electric network fault under the low voltage traversing control method of the synchronous blower fan of total power high-speed permanent magnetic of unnecessary energy.
The low voltage traversing control method of the synchronous blower fan of total power high-speed permanent magnetic of the present invention is: impact by reducing under electric network fault the mechanical load to unit with reference to given torque instruction Te* in reducing pusher side current transformer direct torque control at the motor side of wind power system; Simultaneously, the crowbar circuit that arranges with the energy storage link in DC side absorbs and stores energy unnecessary under electric network fault, to realize the low voltage crossing of blower fan.
Described crowbar circuit with the energy storage link is connected in parallel on the dc bus of wind power system, and it comprises power cell IGBT1, power cell IGBT2, filter inductance L, DC voltage-stabilizing capacitor C
1And capacitor equivalent resistance R
1, super capacitor group C
2The bus positive pole connects the C utmost point of power cell IGBT1, and the E utmost point of power cell IGBT1 connects the C utmost point of power cell IGBT2, and the E utmost point of power cell IGBT2 connects the bus negative pole; The E utmost point of filter inductance L one termination power cell IGBT1, the other end is through the capacitor equivalent resistance R of serial connection
1With the DC voltage-stabilizing capacitor C
1Connect the bus negative pole; Super capacitor group C
2One terminates at filter inductance L and capacitor equivalent resistance R
1Between, another termination bus negative pole;
In the above-mentioned crowbar circuit course of work with the energy storage link, at first by measuring line voltage u
abcJudge whether normally operation of electrical network; If electrical network normally crowbar circuit need not to drop into, if electrical network breaks down, the power that this partial circuit need to be consumed and load voltage U are divided by and obtain reference current i
*This reference current and load current i make difference and carry out proportion integral control again, then carry out the pulse signal g1 that the PWM modulation gets final product controlled power cell IGBT1, with the signal g2 of the controlled power cell IGBT2 of this signal negate; Thereby realize the low voltage crossing of blower fan.
The present invention reduces unit load by suitably reduce the torque reference set-point in direct torque control, by can effectively absorbing energy unnecessary under electric network fault in the DC side increase with the crowbar circuit of energy storage link, be conducive to the reliable and stable operation of unit safety simultaneously.When blower fan under normal circumstances, the unit crowbar circuit is not in connecting system., can store corresponding electric energy and realize the low voltage crossing of blower fan in setting time in the electric network fault situation when blower fan.When peak of power consumption appears in electrical network, can discharge the energy of storing and realize the recycling of energy.
Description of drawings
Fig. 1 is the system's control principle block diagram that adopts control method of the present invention;
Fig. 2 is the system fan stator magnetic linkage model structure block diagram that adopts control method of the present invention;
Fig. 3 is the motor torque model structure block diagram that adopts control method of the present invention;
Fig. 4 is the crowbar circuit figure of DC side band energy storage link in the embodiment of the present invention.
Embodiment
The low voltage traversing control method of the synchronous blower fan of total power high-speed permanent magnetic relates to control and mainly comprises the two large divisions: first is the Direct Torque Control (seeing Fig. 1) of motor side frequency converter, and second portion is DC side band energy storage link crowbar circuit control method (seeing Fig. 3).Wherein:
The Direct Torque Control of first's motor side frequency converter.
Described direct torque control is carried out on two-phase rest frame (α β coordinate).Electrical machine matrix equation under α β coordinate system is:
In formula,
u
sa, u
sβ, u
ra, u
rβBe respectively the fixed/component of rotor voltage on α β coordinate system;
i
sa, i
sβ, i
ra, i
rβBe respectively the fixed/component of rotor current on α β coordinate system;
R
s, R
r, L
s, L
m, L
r, p, ω are respectively fixed/rotor winding equivalent resistance, stator inductance, mutual inductance, inductor rotor, magnetic pole logarithm, rotor velocity;
The expression formula of motor stator voltage on α β coordinate system is:
After following formula is arranged:
Again the component of stator magnetic linkage in following formula on α β coordinate system carried out polar coordinate transform (K/P conversion), can obtain stator magnetic linkage
As shown in Figure 2.
The electromagnetic torque expression formula of motor is: T
e=n
pL
m(i
sβi
rα-i
sαi
rβ), can obtain control block diagram shown in Figure 3.
In this part, at first by measuring line voltage u
abcJudge whether normally operation of electrical network.If electrical network is normal, with reference to given torque instruction Te
*Namely according to the normal condition setting.When electrical network breaks down, consider the given torque instruction Te of mechanical load reference that unit can bear
*=k Δ P/ ω.Wherein, parameter k is Varying parameters in (0-1) scope, and this parameter is fallen the operating modes such as degree, blower fan load and determined by blower fan wind speed, electrical network, and Δ P is the power that unit sends before electric network fault the time.
The crowbar circuit control method of second portion DC side band energy storage link.
This main circuit will comprise two power cell IGBT1, IGBT2, filter inductance L, DC voltage-stabilizing capacitor C
1And capacitor equivalent resistance R
1, super capacitor group C
2
At first by measuring line voltage u
abcJudge whether normally operation of electrical network.If electrical network normally circuit need not the Crowbar circuit.When electrical network broke down, by in conjunction with first's content as can be known, this partial circuit needed to consume the power of (1-k) Δ P.This Partial Power and load voltage U are divided by and can obtain reference current i
*This electric current and load current i make the poor proportion integral control that carries out again, then are carrying out the pulse signal g1 that the PWM modulation can controlled IGBT1.This signal negate can be obtained the signal g2 of IGBT2.By this part action, can realize the low voltage crossing of blower fan.
Claims (2)
1. the low voltage traversing control method of the synchronous blower fan of total power high-speed permanent magnetic is characterized in that: impact by reducing under electric network fault the mechanical load to unit with reference to given torque instruction Te* in reducing pusher side current transformer direct torque control at the motor side of wind power system; Simultaneously, the crowbar circuit that arranges with the energy storage link in DC side absorbs and stores energy unnecessary under electric network fault, to realize the low voltage crossing of blower fan.
2. the low voltage traversing control method of the synchronous blower fan of total power high-speed permanent magnetic according to claim 1, it is characterized in that: described crowbar circuit with the energy storage link is connected in parallel on the dc bus of wind power system, and it comprises power cell IGBT1, power cell IGBT2, filter inductance L, DC voltage-stabilizing capacitor C
1And capacitor equivalent resistance R
1, super capacitor group C
2The bus positive pole connects the C utmost point of power cell IGBT1, and the E utmost point of power cell IGBT1 connects the C utmost point of power cell IGBT2, and the E utmost point of power cell IGBT2 connects the bus negative pole; The E utmost point of filter inductance L one termination power cell IGBT1, the other end is through the capacitor equivalent resistance R of serial connection
1With the DC voltage-stabilizing capacitor C
1Connect the bus negative pole; Super capacitor group C
2One terminates at filter inductance L and capacitor equivalent resistance R
1Between, another termination bus negative pole;
In the described crowbar circuit course of work with the energy storage link, at first by measuring line voltage u
abcJudge whether normally operation of electrical network; If electrical network normally crowbar circuit need not to drop into, if electrical network breaks down, the power that this partial circuit need to be consumed and load voltage U are divided by and obtain reference current i
*This reference current and load current i make difference and carry out proportion integral control again, then carry out the pulse signal g1 that the PWM modulation gets final product controlled power cell IGBT1, with the signal g2 of the controlled power cell IGBT2 of this signal negate; Thereby realize the low voltage crossing of blower fan.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104924531A CN103094917A (en) | 2012-11-27 | 2012-11-27 | Low voltage ride through control method for full-power high-speed permanent synchronous fan |
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| CN2012104924531A CN103094917A (en) | 2012-11-27 | 2012-11-27 | Low voltage ride through control method for full-power high-speed permanent synchronous fan |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667366A (en) * | 2018-05-11 | 2018-10-16 | 青岛大学 | A kind of self-styled closed form electromagnetic coupling speed governing Wind turbines control method using active power mode of priority |
| CN108661862A (en) * | 2018-05-11 | 2018-10-16 | 青岛大学 | A kind of self-styled closed form electromagnetic coupling speed governing Wind turbines control method |
| CN108667081A (en) * | 2018-05-11 | 2018-10-16 | 青岛大学 | A kind of self-styled closed form electromagnetic coupling speed governing Wind turbines control method using reactive power mode of priority |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201789467U (en) * | 2010-09-03 | 2011-04-06 | 国电联合动力技术有限公司 | Double-fed wind-driven generation unit low-voltage-ride-through frequency conversion control system |
| CN102088191A (en) * | 2010-12-22 | 2011-06-08 | 阳光电源股份有限公司 | Method and system for cooperatively controlling low voltage ride through of full-power fan converter |
-
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- 2012-11-27 CN CN2012104924531A patent/CN103094917A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201789467U (en) * | 2010-09-03 | 2011-04-06 | 国电联合动力技术有限公司 | Double-fed wind-driven generation unit low-voltage-ride-through frequency conversion control system |
| CN102088191A (en) * | 2010-12-22 | 2011-06-08 | 阳光电源股份有限公司 | Method and system for cooperatively controlling low voltage ride through of full-power fan converter |
Non-Patent Citations (1)
| Title |
|---|
| 刘广东等: "永磁直驱式风电机组低电压穿越技术研究", 《电力电子技术》, vol. 46, no. 3, 31 March 2012 (2012-03-31), pages 28 - 29 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667366A (en) * | 2018-05-11 | 2018-10-16 | 青岛大学 | A kind of self-styled closed form electromagnetic coupling speed governing Wind turbines control method using active power mode of priority |
| CN108661862A (en) * | 2018-05-11 | 2018-10-16 | 青岛大学 | A kind of self-styled closed form electromagnetic coupling speed governing Wind turbines control method |
| CN108667081A (en) * | 2018-05-11 | 2018-10-16 | 青岛大学 | A kind of self-styled closed form electromagnetic coupling speed governing Wind turbines control method using reactive power mode of priority |
| CN108661862B (en) * | 2018-05-11 | 2019-07-09 | 青岛大学 | A kind of self-styled closed form electromagnetic coupling speed regulation Wind turbines control method |
| CN108667081B (en) * | 2018-05-11 | 2020-04-28 | 青岛大学 | Self-closed electromagnetic coupling speed regulation wind turbine generator control method adopting reactive power priority mode |
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Address after: 260 No. 212004 Zhenjiang city of Jiangsu Province, Runzhou District Nan Xu Road Applicant after: HARBIN ELECTRIC MACHINERY FACTORY (ZHENJIANG) CO., LTD. Address before: 260 No. 212004 Zhenjiang city of Jiangsu Province, Runzhou District Nan Xu Road Applicant before: Harbin General wind energy (Jiangsu) Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: HARBIN ELECTRIC GENERAL ELECTRIC WIND ENERGY (JIANGSU) CO., LTD. TO: HARBIN ELECTRIC MACHINERY (ZHENJIANG) CO., LTD. |
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Application publication date: 20130508 |