CN108988380A - A kind of double fed induction generators control method containing energy storage device - Google Patents
A kind of double fed induction generators control method containing energy storage device Download PDFInfo
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- CN108988380A CN108988380A CN201810718254.5A CN201810718254A CN108988380A CN 108988380 A CN108988380 A CN 108988380A CN 201810718254 A CN201810718254 A CN 201810718254A CN 108988380 A CN108988380 A CN 108988380A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000006698 induction Effects 0.000 title claims abstract description 18
- 238000011217 control strategy Methods 0.000 claims abstract description 44
- 230000006641 stabilisation Effects 0.000 claims abstract description 8
- 238000011105 stabilization Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000001052 transient effect Effects 0.000 abstract description 3
- 241000208340 Araliaceae Species 0.000 description 4
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 4
- 235000003140 Panax quinquefolius Nutrition 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 235000008434 ginseng Nutrition 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/105—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for increasing the stability
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2103/00—Controlling arrangements characterised by the type of generator
- H02P2103/10—Controlling arrangements characterised by the type of generator of the asynchronous type
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The double fed induction generators control method containing energy storage device that the invention proposes a kind of, the energy storage device being equipped with are mainly used for maintaining the stabilization of electric network fault transient DC bus-bar voltage.Specific method: energy storage device is connected with DC bus, and rotor-side inverter uses constant voltage, net side inverter and energy storage device coordination of control strategy, maintains the constant of DC bus-bar voltage.When grid entry point breaks down, falling for grid entry point voltage is detected, put into the voltage that energy storage device is used to stablize DC bus in failure process immediately after.Simultaneously as net side inverter no longer controls DC bus-bar voltage, according to rotor-side active power, current on line side instruction, transmission of the active power to power grid for rotor-side are calculated.Rotor current transformer residual capacity can be used to export to power grid idle simultaneously, support grid entry point voltage.The present invention has the advantages that improving set end voltage dynamic property, improving DC bus-bar voltage stability, reduce capacity of energy storing device.
Description
Technical field
The invention belongs to technical field of wind power generation, especially the double fed induction generators control method containing energy storage device.
Background technique
Double fed induction generators (DFIG) drive doubly-fed wind turbine, double-fed wind generating by gear-box by wind energy conversion system
Machine stator is directly connected directly to power grid transmission power with power grid, and rotor realizes frequency by double PWM converters of " back-to-back "
Transformation, meeting rotor current frequency with rotor speed, stator frequency is consistent with mains frequency, according to the difference of revolutional slip, to electricity
Net conveying absorbs power.
Double fed induction generators are big since its range of speeds is adjusted, and rotor transmission power is only slip power, and inverter holds
The advantages that small is measured, is occupied an important position in wind power industry.
In electric network fault and recovery process, to keeping, DC bus-bar voltage is stable to have larger disturb to Stator transient process
It is dynamic.The control strategy used in the past cannot stable DC busbar voltage well, while fail to make full use of net side inverter and
Generator provides reactive power to power grid, carries out voltage support.
Summary of the invention
The double fed induction generators control method containing energy storage device that the purpose of the present invention is to provide a kind of, to solve electricity
Net failure causes double-fed wind power generator group DC bus-bar voltage fluctuating range big, and then caused off-grid problem.
The technical solution for realizing the aim of the invention is as follows: a kind of double fed induction generators controlling party containing energy storage device
Method, comprising:
Rotor-side converter Control strategy is using active-end voltage control；
Rotor-side inverter reference current uses Current limited Control strategy, and in the case where guaranteeing end voltage stabilization, output has
Function power；
Net side converter Control strategy and energy storage device control strategy cooperate, specifically:
When normal operation, using the control of DC bus-bar voltage-end voltage, energy storage device voluntarily charges control net side inverter
System；
When breaking down, net side inverter uses DC bus-bar voltage control using active-end voltage control, energy storage device
System；
Net side inverter reference current uses Current limited Control strategy, is guaranteeing DC bus-bar voltage stabilization or active output
In enough situations, required reactive power is conveyed to support generator voltage.
Preferably, using stator voltage vector oriented.
Preferably, Current limited Control link in rotor-side converter Control, the reactive current reference value that end voltage link generatesPriority is higher than the current reference value that real power control link generatesThat is:
ir_maxFor current limit,For reactive current value.
Preferably, net side converter Control strategy and energy storage device control strategy cooperate, when operating normally, direct current
Busbar voltage can voluntarily be charged by net side converter Control, energy storage device, charging current iesd, when detect generator end electricity
The failing edge of pressure, net side inverter are switched to active power controller by DC bus-bar voltage control, calculate active power electric current ginseng
Value is examined, speciallyPrFor rotor-side active power, vsdFor stator side d shaft voltage, reactive current duration ts, nothing
Function current duration tsValue is the half that low voltage crossing wants seeking time.
Preferably, Current limited Control active power reference electric current in net side converter Control strategyPriority is higher than end electricity
Voltage-controlled reference current processedThat is:
Energy storage device current reference value is by charging current reference value i simultaneouslyesdSwitch to DC bus-bar voltage control electric current ginseng
Examine value, duration ts。
Preferably, when rotor-side converter Control strategy is using active-end voltage control, the realization of maximum power point is specific
Power points to be corresponded on maximum power point curve according to real-time revolving speed provides active reference value.
Compared with prior art, the present invention its remarkable advantage are as follows: the present invention can improve set end voltage dynamic property, improve
DC bus-bar voltage stability reduces capacity of energy storing device.
Detailed description of the invention
Fig. 1 is the schematic diagram of the double fed induction generators control method of the invention containing energy storage device.
Fig. 2 is the current reference value control principle drawing of the double fed induction generators of the invention containing energy storage device.
Fig. 3 is the power speed curves figure of wind energy conversion system of the present invention.
Fig. 4 is grid entry point voltage simulation curve figure in the embodiment of the present invention.
Fig. 5 is DC bus-bar voltage simulation curve figure in the embodiment of the present invention.
Specific embodiment
Detailed description of the preferred embodiments with working principle with reference to the accompanying drawing.
Main operational principle of the invention is based in the transient process caused by electric network fault, doubly-fed wind turbine end
Voltage sharply declines, and stator magnetic linkage is caused to fall, and then induces larger electromotive force in rotor-side, causes the vibration of rotor current
It swings, and then fluctuates rotor DC bus-bar voltage, influence rotor-side converter Control, can effectively be solved by the control strategy
Certainly DC bus-bar voltage fluctuation problem.
As shown in Figure 1 and Figure 2, a kind of double fed induction generators control method containing energy storage device of the present invention, in net side failure
When grid entry point voltage being caused to decline to a great extent, in order to maintain the stabilization of DC bus-bar voltage, access energy storage device, and switch net side with
The control strategy of energy storage device, specifically includes:
Rotor-side converter Control strategy is using active-end voltage control；
Rotor-side inverter reference current uses Current limited Control strategy, and in the case where guaranteeing end voltage stabilization, output has
Function power；
Net side converter Control strategy and energy storage device control measurement cooperate, specifically:
When normal operation, using the control of DC bus-bar voltage-end voltage, energy storage device voluntarily charges control net side inverter
System；
When breaking down, net side inverter uses DC bus-bar voltage control using active-end voltage control, energy storage device
System；
Net side inverter reference current uses Current limited Control strategy, is guaranteeing DC bus-bar voltage stabilization or active output
In enough situations, required inactivity is conveyed to support generator voltage.In practice, specific steps are as follows:
(1) grid entry point voltage is detected, when grid entry point Voltage Drop restores, setting Reflector flag is 1.Duration ts；
(2) when Reflector is 1, switching net side converter Control strategy is active-end voltage control.
(3) when Reflector is 1, switch energy storage device control strategy as DC bus-bar voltage control.
(4) when Reflector reverts to 0, switching net side converter Control strategy is DC voltage-end voltage control；
(5) when Reflector reverts to 0, switching energy storage device control strategy is voluntarily to charge.
(6) rotor-side inverter and net side inverter are all controlled using constant voltage, when grid entry point Voltage Drop, double-fed blower
Stator and net side inverter provide reactive power support to power grid.
In further embodiment, using stator voltage vector oriented.
In further embodiment, Current limited Control link in rotor-side converter Control, end voltage link generates idle
Current reference valuePriority is higher than the current reference value that real power control link generatesThat is:
ir_maxFor current limit,For reactive current value.
In further embodiment, net side converter Control strategy and energy storage device control strategy cooperate, normal
When operation, DC bus-bar voltage can voluntarily be charged by net side converter Control, energy storage device, charging current iesd, when detecting
The failing edge of generator voltage, net side inverter are switched to active power controller by DC bus-bar voltage control, calculate active
Power current reference value, speciallyPrFor rotor-side active power, vsdFor stator side d shaft voltage, reactive current is held
Continuous time ts, reactive current duration tsValue low voltage crossing wants the half of seeking time.
In further embodiment, Current limited Control active power reference electric current in net side converter Control strategyPreferentially
Grade is higher than end voltage and controls reference currentThat is:
Energy storage device current reference value is by charging current reference value i simultaneouslyesdSwitch to DC bus-bar voltage control electric current ginseng
Examine value, duration ts。
In further embodiment, when rotor-side converter Control strategy is using active-end voltage control, maximum power point
Realization be specially the power points on maximum power point curve is corresponded to according to real-time revolving speed to provide active reference value.
Energy storage device of the present invention is connected with DC bus, and rotor-side inverter uses constant voltage, net side inverter and energy storage
Device control strategy cooperation, maintains the constant of DC bus-bar voltage.When grid entry point breaks down, falling for grid entry point voltage is detected
It falls, puts into the voltage that energy storage device is used to stablize DC bus in failure process immediately after.Simultaneously as net side inverter is not
DC bus-bar voltage is controlled again, according to rotor-side active power, calculates current on line side instruction, the active power for rotor-side
Transmission to power grid.Rotor inverter residual capacity can be used to export to power grid idle simultaneously, support grid entry point voltage.
Below with reference to embodiment, the present invention will be further described.
Embodiment
The control method of this example the following steps are included:
1, each parameter is initialized, wind energy conversion system uses per unit value model, rated power Pn=1MVA；Double fed induction generators ginseng
Number: stator resistance rs=3.569e-3 Ω, stator resistance rr=3.654e-3 Ω, stator leakage inductance Lls=0.1304e-3H, rotor
Leakage inductance Llr=0.1198e-3H, rotor mutual inductance Lm=4.12e-3H, rated power Pn=1MVA, rated speed wr=2160r/
Min, rated frequency f=60Hz, number of pole-pairs p=2；Capacitance parameter: capacitor: C=0.01F, capacitance voltage Udc=1200V；Power grid
Parameter: voltage Um=575V, frequency f=60Hz.
2, whole control strategy uses stator voltage vector oriented, i.e.,Rotor-side inverter d axis control strategy uses
Power outer ring, current inner loop.As shown in figure 3, the value and power reference of outer ring is ps_ref *, bent by maximum power point by revolving speed wr
Line generates, by maximum power point curve and power speed curves figure it is found that the maximum power point under current wind speed is to balance
Point.The reference value of watt current is obtained by pi regulatorRotor-side inverter q axis control strategy, using outer voltage,
Current inner loop.Rated voltage as the reference voltage, generates compared with holding voltage by PI controller, reactive current reference
Value isBy Current limited Control unit, meet following relationship:
Obtain dq shaft current reference valueWithIt willWithCompared with actual measured value, by current regulator, then
The feedforward compensation that decoupling control is added obtains reference voltage vrdAnd vrq.V is obtained by the transformation of dq/abcrabc。
3, net side converter Control strategy is similar with rotor-side, still uses stator voltage vector oriented, and dq axis is all made of voltage
The control strategy of outer ring current inner loop.Current limited Control strategy is different from rotor-side control strategy, meets following relationship:
4, when detecting that network voltage breaks down, Reflector, energy storage device the control strategy under malfunction: are triggered
Malfunction voltage is stablized in access.Rotor-side inverter d axis control simultaneously is switched to active power with DC bus-bar voltage control
Control, active power current reference value are acquired by the stator active power of real-time measurement with generator voltage, guarantee that two sides are changed
Device power-balance is flowed, prevents energy storage device from largely absorbing or discharging electric energy.
5, failure is introduced in 1.0s, generator voltage drops to 0.3, and energy storage device is put into immediately, maintains DC bus
Voltage, net side inverter switch to power control, and energy storage device puts into duration tsEnergy storage dress is cut out when=0.3s, 1.3s
It sets, DC bus-bar voltage is controlled by net side.Voltage restores when 1.6s, detects the rising edge signal of voltage, is delayed after 0.3s, cuts
Energy storage device out.
As a result as shown in figure 5, when Voltage Drop as shown in Figure 4 occurs for generator voltage, using the present embodiment
The DC bus-bar voltage of control strategy is basically stable near reference value, realizes above-mentioned described function.
Claims (6)
1. a kind of double fed induction generators control method containing energy storage device characterized by comprising
Rotor-side converter Control strategy is using active-end voltage control；
Rotor-side inverter reference current uses Current limited Control strategy, in the case where guaranteeing end voltage stabilization, exports wattful power
Rate；
Net side converter Control strategy and energy storage device control strategy cooperate, specifically:
When normal operation, net side inverter is using the control of DC bus-bar voltage-end voltage, energy storage device voluntarily charge control；
When breaking down, net side inverter is controlled using active-end voltage control, energy storage device using DC bus-bar voltage；
Net side inverter reference current uses Current limited Control strategy, is guaranteeing that DC bus-bar voltage stabilization or active output are enough
In the case where, required reactive power is conveyed to support generator voltage.
2. the double fed induction generators control method according to claim 1 containing energy storage device, which is characterized in that using fixed
Son is voltage oriented.
3. the double fed induction generators control method according to claim 1 containing energy storage device, which is characterized in that rotor-side
Current limited Control link in converter Control, the reactive current reference value that end voltage link generatesPriority is higher than real power control ring
Save the current reference value generatedThat is:
ir_maxFor current limit,For reactive current value.
4. the double fed induction generators control method according to claim 1 containing energy storage device, which is characterized in that net side is changed
It flows device control strategy and energy storage device control strategy cooperates, when operating normally, DC bus-bar voltage is by net side inverter
Control, energy storage device can voluntarily charge, charging current iesd, when the failing edge for detecting generator voltage, net side inverter
Active power controller is switched to by DC bus-bar voltage control, calculates active power current reference value, speciallyPrFor
Rotor-side active power, vsdFor stator side d shaft voltage, reactive current duration ts, reactive current duration tsValue is
Low voltage crossing wants the half of seeking time.
5. the double fed induction generators control method according to claim 1 containing energy storage device, which is characterized in that net side is changed
Flow Current limited Control active power reference electric current in device control strategyPriority is higher than end voltage and controls reference currentThat is:
Energy storage device current reference value is by charging current reference value i simultaneouslyesdSwitch to DC bus-bar voltage control current reference
Value, duration ts。
6. the double fed induction generators control method according to claim 1 containing energy storage device, which is characterized in that rotor-side
When converter Control strategy is using active-end voltage control, the realization of maximum power point is specially corresponding most according to real-time revolving speed
Power points on high-power point curve provides active reference value.
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| CN201810718254.5A CN108988380A (en) | 2018-07-03 | 2018-07-03 | A kind of double fed induction generators control method containing energy storage device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830978A (en) * | 2019-01-02 | 2019-05-31 | 华中科技大学 | A kind of soft lineal system of wind-powered electricity generation having the automatic ride-through capability of failure and control method |
| CN111478318A (en) * | 2020-04-17 | 2020-07-31 | 许昌许继风电科技有限公司 | Operation control method based on wind generating set power limitation |
| US10903773B1 (en) | 2019-07-15 | 2021-01-26 | Industrial Technology Research Institute | Kinetic energy recovery system with flywheel |
| CN113809748A (en) * | 2021-11-19 | 2021-12-17 | 中国电力科学研究院有限公司 | Energy storage device capacity determination method for new energy support machine and new energy support machine |
| US11588373B2 (en) | 2019-07-15 | 2023-02-21 | Industrial Technology Research Institute | Kinetic energy recovery system with flywheel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830978A (en) * | 2019-01-02 | 2019-05-31 | 华中科技大学 | A kind of soft lineal system of wind-powered electricity generation having the automatic ride-through capability of failure and control method |
| US10903773B1 (en) | 2019-07-15 | 2021-01-26 | Industrial Technology Research Institute | Kinetic energy recovery system with flywheel |
| US11588373B2 (en) | 2019-07-15 | 2023-02-21 | Industrial Technology Research Institute | Kinetic energy recovery system with flywheel |
| CN111478318A (en) * | 2020-04-17 | 2020-07-31 | 许昌许继风电科技有限公司 | Operation control method based on wind generating set power limitation |
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| CN113809748A (en) * | 2021-11-19 | 2021-12-17 | 中国电力科学研究院有限公司 | Energy storage device capacity determination method for new energy support machine and new energy support machine |
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