CN102684209B - Method for improving sub-synchronous oscillation (SSO) damping of thermal power plant by utilizing fan supplementary controller - Google Patents
Method for improving sub-synchronous oscillation (SSO) damping of thermal power plant by utilizing fan supplementary controller Download PDFInfo
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- CN102684209B CN102684209B CN201210044345.8A CN201210044345A CN102684209B CN 102684209 B CN102684209 B CN 102684209B CN 201210044345 A CN201210044345 A CN 201210044345A CN 102684209 B CN102684209 B CN 102684209B
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- 238000013016 damping Methods 0.000 title claims abstract description 52
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- 230000003321 amplification Effects 0.000 claims description 7
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
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- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000005619 thermoelectricity Effects 0.000 claims description 3
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- 238000011217 control strategy Methods 0.000 claims description 2
- 230000010363 phase shift Effects 0.000 claims description 2
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention belongs to the power system field and particularly relates to a method for improving the sub-synchronous oscillation (SSO) damping of a thermal power plant in a wind-thermal power series-compensation combined transmission system by utilizing a supplementary controller to modulate the reactive power output of a wind generation set. The method is based on the rotor current active and reactive decoupling control principle of a double-fed wind generation set, and introduces shafting rotational speed difference of a combined-transmission thermal power plant as the characteristic signal for designing a damping controller, and the output of the damping controller is modulation component under the control of rotor reactive power; and through the regulation on the reactive power of the wind generation set, the effect of enhancing the SSO damping of the combined-transmission thermal power plant is achieved. The invention is applicable to large-capacity wind-thermal power combined series capacitance compensation transmission occasions, so the SSO property of the thermal power plant can be improved, the electric power of a new energy resource is ensured to be transmitted safely, continuously and reliably, and the power system is also ensured to operate safely and stably.
Description
Technical field
The invention belongs to field of power, be specifically related to one and utilize blower fan additional controller to improve the method for grid-connected fired power generating unit sub-synchronous oscillation (Subsynchronous Oscillation, SSO) damping.
background technology
Having a high potential of Wind Power Utilization, the developed installation total capacity of land and wind energy on the sea reaches about 7～1,200,000,000 kilowatts, and the data that up-to-date assessment report proposes even can reach more than 2,500,000,000 kilowatts.Along with the extensive development of wind energy turbine set, the research of wind-powered electricity generation unit, Manufacture and application level, also at development, developed into the variable speed constant frequency wind-powered electricity generation unit of pursuing wind energy maximum conversion efficiency to the not high constant speed blower fan of wind energy utilization efficiency from the past.Wherein, the megawatt-level wind unit based on double fed induction generators, because it is in the plurality of advantages of performance aspect operation, has become the mainstream model of current wind-power market.
In the country with a vast territory of region, wind-powered electricity generation generally adopts the development mode of " extensive, high concentrating " and the transport model of " large capacity, high voltage, remote ".Regional wind-powered electricity generation and the thermoelectricity bundling with abundant wind resource can be sent outside, can make up so the large capacity that uncertainty that wind power exerts oneself causes and send passway for transmitting electricity equipment efficiency of usage adverse effect on the low side outside, ensure stability and the electric power system operation economy of energy supply.But wind-resources enriches comparatively weakness of regional electric power system main grid structure at present, installs series compensation additional by Transmission Corridor, promotes wind fire bundling ability to send outside and power transmission efficiency, is a kind of feasible technical measures.
Wind fire bundling string is mended and sent outside, in improving new forms of energy ability to send outside and power transmission efficiency, the threat that can increase sending end fired power generating unit sub-synchronous oscillation, and power network safety operation is brought to adverse effect.
summary of the invention
For overcoming above-mentioned defect, the invention provides a kind of method of utilizing blower fan additional controller to improve fired power generating unit SSO damping, utilize idle the exerting oneself of additional controller modulation double-fed fan motor unit, improved the effect of sending fired power generating unit subsynchronous oscillation damping in system outside.
For achieving the above object, the invention provides a kind of method of utilizing blower fan additional controller to improve fired power generating unit SSO damping, its improvements are, said method comprising the steps of:
(1). set up wind-powered electricity generation unit and the fired power generating unit analogue system of sending outside through series compensation, the described grid-connected system of sending outside comprises fired power generating unit, double-fed fan motor unit and Series Compensated Transmission Lines, and described double-fed fan motor unit comprises rotor Reactive Power Control loop;
(2). the idle reference instruction signal delta Q of subsynchronous frequency in described rotor Reactive Power Control loop, carry out numerical simulation until described in send system outside and enter stable state, record the electromagnetic torque disturbing signal Δ T of described fired power generating unit
e, and obtain Δ T
eand the phase-frequency characteristic curve between Δ Q;
(3). in described wind-powered electricity generation unit, damping controller is set, for sending the sub-synchronous oscillation of system described in eliminating outside;
(4). verification suppresses the effect of generator sub-synchronous oscillation;
(5). finely tune the parameter of described damping controller, optimize described fired power generating unit subsynchronous oscillation damping characteristic.
In optimal technical scheme provided by the invention, in described step 1, adopt electromagnetic transient in power system simulation calculation instrument, set up the system of sending outside of described wind-powered electricity generation unit and described fired power generating unit.
In the second optimal technical scheme provided by the invention, in described step 2, utilize Fourier decomposition to obtain the phase-frequency characteristic curve between Δ Te and Δ Q; Described signal delta Q is the idle reference instruction signal of subsynchronous frequency.
In the 3rd optimal technical scheme provided by the invention, in described step 3, described damping controller, by the generator speed deviation signal in described wind-powered electricity generation unit is amplified and phase shift, producing control signal regulates the idle of described wind-powered electricity generation unit to exert oneself, make described wind-powered electricity generation unit in inferior frequency domain for described fired power generating unit provides positive electrical damping, eliminate sub-synchronous oscillation.
In the 4th optimal technical scheme provided by the invention, in described step 4, described wind fire bundling is sent outside to system and apply disturbance, damping controller suppresses the effect of generator sub-synchronous oscillation described in verification.
In the 5th optimal technical scheme provided by the invention, in described step 1, described wind-powered electricity generation unit comprises wind power system, wind-driven generator and wind power generator control system; It is multimass piece dynamic characteristic that described fired power generating unit is taken into account axle; Wind power generator control system comprises: the rotor-side control system being set up in parallel and stator side control system.
In the 6th optimal technical scheme provided by the invention, described wind-powered electricity generation unit is doubly-fed variable-speed constant-frequency rate wind-powered electricity generation unit.
In the 7th optimal technical scheme provided by the invention, described rotor-side control system adopts the power decoupled controller based on stator magnetic linkage oriented; Described stator side control system adopts the power decoupled controller based on line voltage orientation.
In the 8th optimal technical scheme provided by the invention, in described step 2, in the Reactive Power Control loop of wind-powered electricity generation unit, the inferior frequency domain oscillator signal Δ Q that frequency range is 5 to 55Hz, increment is 1Hz is superimposed to reference instruction value Q
refupper, that is:
Start simulation calculation until system enters stable state, extract Δ Q delta data and generating set electromagnetic torque Te data in common period, Δ Q and Te are carried out to Fourier decomposition, obtain the idle reference instruction phasor signal under different frequency
with fired power generating unit electromagnetic torque phasor signal
calculate phase-frequency characteristic, that is:
According to phase-frequency characteristic, determine generator sub-synchronous oscillation threat frequency point f
xand the compensation of phase of described damping controller under this frequency
application parameter tuning formulae, determines damping controller constant correlation time, and described parameter tuning formula is as follows:
Described damping controller parameter is adjusted, and described damping controller parameter comprises amplification coefficient K, every straight link time constant T
wwith lead-lag link time constant T
a, T
b.
In the 9th optimal technical scheme provided by the invention, in described step 3, send outside in system at wind-powered electricity generation and thermoelectricity bundling, damping controller suppresses the validity of generator sub-synchronous oscillation described in verification; Described, when sending system outside large disturbance occurring, emulation verification damping controller suppresses the validity of generator sub-synchronous oscillation.
In the tenth optimal technical scheme provided by the invention, ask for described damping controller parameter, to the threat frequency point f of described sub-synchronous oscillation
xcarry out phase place and amplitude compensation.
In more preferably technical scheme provided by the invention, described wind power system comprises: the wind speed simulation system, wind wheel unit simulated behavior unit and the blade angle control unit that set gradually; Described wind power system is output as wind-driven generator input machine torque.
Provided by the invention second more preferably in technical scheme, and described wind turbine generator adopts double fed induction generators; Described wind power generator rotor loop is by converter and Power System Interconnection; Described wind power generator rotor voltage u
rdwith u
rqbe not equal to 0, double fed induction generators, by controlling described wind power generator rotor external voltage, can be controlled the meritorious and reactive power of wind turbine group output; Synchronous rotary d
q0under coordinate system, the voltage equation of double fed induction generators is:
U in described voltage equation
sd, u
sq, u
rd, u
rqbe respectively d axle and the q axle component of stator winding and rotor winding voltage; R
sand R
rbe respectively stator winding and rotor winding phase resistance; i
sd, i
sq, i
rd, i
rqbe respectively d axle and the q axle component of stator winding and rotor winding; ω
nfor synchronous rotary speed; S is rotor slippage; ψ
sd, ψ
sq, ψ
rd, ψ
rqbe respectively the magnetic linkage of stator and rotor d axle and q axle;
The magnetic linkage equation of wind turbine generator is:
ψ
sd＝(L
ss+L
m)i
sd+L
mi
rd
ψ
sq＝(L
ss+L
m)i
sq+L
mi
rq
ψ
rd＝(L
rr+L
m)i
rd+L
mi
sd
ψ
rq＝(L
rr+L
m)i
rq+L
mi
sq
Wherein, L
ss, L
rr, L
mbe respectively the mutual inductance between every phase leakage inductance and stator and the rotor of stator and rotor.
The provided by the invention the 3rd more preferably in technical scheme, described blower fan control system is divided into two-layer: ground floor is the optimum wind power tracking control unit of wind energy conversion system and wind-powered electricity generation unit Reactive Power Control unit, and the optimum wind power tracking of described wind energy conversion system is determined fan rotor optimized rotating speed according to real-time wind speed; Described wind-powered electricity generation unit Reactive Power Control is determined the idle reference value of wind-powered electricity generation unit according to Reactive Power Control strategy; The second layer is power decoupled control unit, taking the determined optimized rotating speed of ground floor control and reactive power reference qref as controlling target, realizes the meritorious and idle decoupling zero control of stator side and rotor-side frequency converter.
Compared with the prior art, a kind of method of utilizing blower fan additional controller to improve fired power generating unit SSO damping provided by the invention, according to the general principle of double-fed fan motor unit rotor current decoupling zero control, be introduced as the damping controller of grid-connected fired power generating unit speed error signal design, damping controller is output as blower fan reactive power set point modulation product, by to the idle adjusting of exerting oneself of blower fan, reach the effect of amplification generator group subsynchronous oscillation damping; Double-fed fan motor unit is by controlling rotor current, there is active power and reactive power regulating power fast, in sending end wind fire bundling system, make full use of the power adjustments control of wind-powered electricity generation unit, improve fired power generating unit subsynchronous oscillation damping characteristic, suppress the vibration of axle system, there is good economy and application prospect.
Brief description of the drawings
Fig. 1 is the attached damping controller theory diagram of wind-powered electricity generation unit.
Fig. 2 is double feedback electric engine control logic schematic diagram.
Fig. 3 is rotor-side Frequency Converter Control block diagram.
Fig. 4 is that wind fire bundling string benefit is sent test macro outside.
Fig. 5 is for being that wind fire bundling string is mended and sent phase-frequency characteristic schematic diagram between test macro fan rotor Reactive Power Control input and generator electromagnetic torque outside.
Fig. 6 is under output of wind electric field 33% condition, is diverging oscillation schematic diagram without the additional control of blower fan generator shaft.
Fig. 7 is under output of wind electric field 33% condition, has the additional generator shaft system convergence vibration schematic diagram of controlling of blower fan.
Fig. 8 is under output of wind electric field 33% condition, has the additional generator electromagnetic torque schematic diagram of controlling of blower fan.
Fig. 9 is under output of wind electric field 33% condition, has the additional wind energy turbine set of controlling of blower fan to gain merit and reactive power schematic diagram.
Figure 10 is under output of wind electric field 67% condition, is diverging oscillation schematic diagram without the additional control of blower fan generator shaft.
Figure 11 is under output of wind electric field 67% condition, has the additional generator shaft system convergence vibration schematic diagram of controlling of blower fan.
Figure 12 is under output of wind electric field 67% condition, has the additional generator electromagnetic torque schematic diagram of controlling of blower fan.
Figure 13 is under output of wind electric field 67% condition, has the additional wind energy turbine set of controlling of blower fan to gain merit and reactive power schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
(1) wind fire bundling string is mended and is sent the detailed modeling of system outside
Adopt electromagnetic transient in power system emulation tool, set up wind-powered electricity generation unit and wind energy turbine set simulation model, and axle is fired power generating unit model, the string benefit transmission system model of multimass dynamic analog.Wherein, Fig. 1 is wind-powered electricity generation unit additional controller theory diagram, and Fig. 2 is the control system schematic diagram of double-fed blower fan, and rotor-side Frequency Converter Control target is respectively blower fan output reactive power and the corresponding rotor optimized rotating speed of wind speed in real time; Stator side Frequency Converter Control target is frequency converter DC voltage and exchanges reactive power.As shown in Figure 3, damping controller is output as the modulation signal of rotor Reactive Power Control to the rotor-side frequency converter control system of double-fed fan motor unit.
(2) Fig. 4 is that wind fire bundling string benefit is sent test macro outside, a wherein Large Scale Wind Farm Integration of sending end region access, and wind energy turbine set has 100 double-fed fan motor units, and unit rated capacity is 1.5MW, by two-stage step-up transformer access electrical network.
Apply the small-signal Δ Q of a series of 5-55Hz at fan rotor Reactive Power Control reference settings value place, described signal delta Q is the idle reference instruction signal of the subsynchronous frequency of small magnitude, that is:
Start simulation calculation until system enters stable state, extract Δ Q delta data and generator electromagnetic torque T in common period
edata, to Δ Q and T
ecarry out Fourier decomposition, and calculate phase-frequency characteristic:
(3) basis phase-frequency characteristic as shown in Figure 5, determines generator sub-synchronous oscillation threat frequency point f
xand the compensation of phase of subsynchronous oscillation damping controller under this frequency
be respectively 32Hz and 50 °.
Application additional controller parameter tuning formula, and calculate effect in conjunction with time-domain-simulation, determine additional controller parameter K=2, T
w=10, T
a=0.0074, T
b=0.0032; Wherein, amplification coefficient K, every straight link time constant T
wwith lead-lag link time constant T
a, T
b.
Described parameter tuning formula is as follows:
Described damping controller parameter comprises amplification coefficient K, every straight link time constant T
wwith lead-lag link time constant T
a, T
b.
(4) under the different service conditionss of wind energy turbine set, verify that it suppresses the validity of generator sub-synchronous oscillation.
By changing wind speed, to investigate under the different service capacity levels of wind energy turbine set, blower fan additional controller suppresses the effect of generator sub-synchronous oscillation.
Three-phase instantaneous short-circuit fault is set on transmission line, and getting its generator angular speed deviation signal is the input signal of blower fan additional controller, output signal Q
pbe superimposed to reference settings value Q
ref1on.Change wind speed size, make output of wind electric field be respectively 50MW, 100MW.
Fig. 6-Fig. 9 is under output of wind electric field 50MW condition, and while control without blower fan is additional, generator shaft is diverging oscillation and configuration damping controller rear axle mechanism convergence oscillating curve, and generator electromagnetic torque, wind energy turbine set are meritorious and the curve such as reactive power.As we can see from the figure, introduce damping controller to the modulation of wind energy turbine set reactive power, the significantly subsynchronous oscillation damping of amplification generator group, maintains the stable of axle system.
Figure 10-Figure 13 is under output of wind electric field 100MW condition, and while control without blower fan is additional, generator shaft is diverging oscillation and configuration damping controller rear axle mechanism convergence oscillating curve, and generator electromagnetic torque, wind energy turbine set are meritorious and the curve such as reactive power.As we can see from the figure, introduce damping controller to the modulation of wind energy turbine set reactive power, the significantly subsynchronous oscillation damping of amplification generator group, maintains the stable of axle system.
Need statement, content of the present invention and embodiment are intended to prove the practical application of technical scheme provided by the present invention, should not be construed as limiting the scope of the present invention.Those skilled in the art inspired by the spirit and principles of the present invention, can do various amendments, be equal to and replace or improve.But in the protection range that these changes or amendment are all awaited the reply in application.
Claims (14)
1. utilize blower fan additional controller to improve a method for fired power generating unit SSO damping, it is characterized in that, said method comprising the steps of:
(1). set up wind-powered electricity generation unit and the fired power generating unit analogue system of sending outside through series compensation, grid-connectedly send system outside and comprise fired power generating unit, double-fed fan motor unit and Series Compensated Transmission Lines, described double-fed fan motor unit comprises rotor Reactive Power Control loop;
(2). the idle reference instruction signal △ Q of subsynchronous frequency in described rotor Reactive Power Control loop, carry out numerical simulation until described in send system outside and enter stable state, record the electromagnetic torque disturbing signal △ T of described fired power generating unit
e, and obtain △ T
eand the phase-frequency characteristic curve between △ Q;
(3). in described wind-powered electricity generation unit, damping controller is set, for sending the sub-synchronous oscillation of system described in eliminating outside;
(4). verification suppresses the effect of generator sub-synchronous oscillation;
(5). finely tune the parameter of described damping controller, optimize described fired power generating unit subsynchronous oscillation damping characteristic.
2. method according to claim 1, is characterized in that, in described step (1), adopts electromagnetic transient in power system simulation calculation instrument, sets up the system of sending outside of described wind-powered electricity generation unit and described fired power generating unit.
3. method according to claim 1, is characterized in that, in described step (2), utilizes Fourier decomposition to obtain the phase-frequency characteristic curve between △ Te and △ Q; The idle reference instruction signal that described signal △ Q is subsynchronous frequency.
4. method according to claim 1, it is characterized in that, in described step (3), described damping controller, by the generator speed deviation signal in described wind-powered electricity generation unit is amplified and phase shift, produce control signal regulate the idle of described wind-powered electricity generation unit to exert oneself, make described wind-powered electricity generation unit in inferior frequency domain for described fired power generating unit provides positive electrical damping, eliminate sub-synchronous oscillation.
5. method according to claim 1, is characterized in that, in described step (4), the described grid-connected system of sending outside is applied to disturbance, and damping controller suppresses the effect of generator sub-synchronous oscillation described in verification.
6. according to the method described in claim 1 ?5, it is characterized in that, in described step (1), described wind-powered electricity generation unit comprises wind power system or wind-driven generator or wind power generator control system; It is multimass piece dynamic characteristic that described fired power generating unit is taken into account axle; Wind power generator control system comprises: the rotor-side control system being set up in parallel and stator side control system.
7. method according to claim 6, is characterized in that, described wind-powered electricity generation unit is doubly-fed variable-speed constant-frequency rate wind-powered electricity generation unit.
8. method according to claim 7, is characterized in that, described rotor-side control system adopts the power decoupled controller based on stator magnetic linkage oriented; Described stator side control system adopts the power decoupled controller based on line voltage orientation.
According to claim 1 ?method described in 5, it is characterized in that, in described step (2), in the Reactive Power Control loop of wind-powered electricity generation unit, by frequency range be 5 to 55Hz or the idle reference instruction signal △ Q of the increment subsynchronous frequency that is 1Hz be superimposed to reference instruction value Q
refupper, that is:
Start simulation calculation until system enters stable state, extract △ Q delta data and generating set electromagnetic torque Te data in common period, △ Q and Te are carried out to Fourier decomposition, obtain the idle reference instruction phasor signal under different frequency
with fired power generating unit electromagnetic torque phasor signal
calculate phase-frequency characteristic, that is:
According to phase-frequency characteristic, determine generator sub-synchronous oscillation threat frequency point f
xand the compensation of phase of described damping controller under this frequency
application parameter tuning formulae, determines damping controller constant correlation time, and described parameter tuning formula is as follows:
Described damping controller parameter is adjusted, and described damping controller parameter comprises amplification coefficient K, every straight link time constant T
wwith lead-lag link time constant T
a, T
b.
According to claim 1 ?method described in 5, it is characterized in that, in described step (3), send outside in system at wind-powered electricity generation and thermoelectricity bundling, damping controller suppresses the validity of generator sub-synchronous oscillation described in verification; Or described when sending system outside large disturbance occurring, emulation verification damping controller suppresses the validity of generator sub-synchronous oscillation.
11. methods according to claim 9, is characterized in that, ask for described damping controller parameter, to the threat frequency point f of described sub-synchronous oscillation
xcarry out phase place and amplitude compensation.
12. methods according to claim 7, is characterized in that, described wind power system comprises: the wind speed simulation system, wind wheel unit simulated behavior unit and the blade angle control unit that set gradually; Described wind power system is output as wind-driven generator input machine torque.
13. methods according to claim 7, is characterized in that, described Wind turbine adopts double fed induction generators; Described wind-force group machine rotor loop is by converter and Power System Interconnection; Described wind-force group machine rotor voltage u
rdwith u
rqbe not equal to 0, double fed induction generators, by controlling described wind-force group machine rotor external voltage, can be controlled the meritorious and reactive power of wind turbine group output; Synchronous rotary d
q0under coordinate system, the voltage equation of double fed induction generators is:
U in described voltage equation
sd, u
sq, u
rd, u
rqbe respectively d axle and the q axle component of stator winding and rotor winding voltage; R
sand R
rbe respectively stator winding and rotor winding phase resistance; i
sd, i
sq, i
rd, i
rqbe respectively d axle and the q axle component of stator winding and rotor winding current; ω
nfor synchronous rotary speed; S is rotor slippage; ψ
sd, ψ
sq, ψ
rd, ψ
rqbe respectively the magnetic linkage of stator and rotor d axle and q axle;
The magnetic linkage equation of wind turbine generator is:
ψ
sd＝(L
ss+L
m)i
sd+L
mi
rd
ψ
sq＝(L
ss+L
m)i
sq+L
mi
rq
ψ
rd＝(L
rr+L
m)i
rd+L
mi
sd
ψ
rq＝(L
rr+L
m)i
rq+L
mi
sq
Wherein, L
ss, L
rr, L
mbe respectively the mutual inductance between every phase leakage inductance and stator and the rotor of stator and rotor.
14. methods according to claim 7, it is characterized in that, described wind power generator control system is divided into two-layer: ground floor is the optimum wind power tracking control unit of wind energy conversion system and wind-powered electricity generation unit Reactive Power Control unit, and the optimum wind power tracking of described wind energy conversion system is determined fan rotor optimized rotating speed according to real-time wind speed; Described wind-powered electricity generation unit Reactive Power Control is determined the idle reference value of wind-powered electricity generation unit according to Reactive Power Control strategy; The second layer is power decoupled control unit, taking the determined optimized rotating speed of ground floor control and reactive power reference qref as controlling target, realizes the meritorious and idle decoupling zero control of stator side and rotor-side frequency converter.
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|---|---|---|---|
| CN201210044345.8A CN102684209B (en) | 2012-06-18 | 2012-06-18 | Method for improving sub-synchronous oscillation (SSO) damping of thermal power plant by utilizing fan supplementary controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210044345.8A CN102684209B (en) | 2012-06-18 | 2012-06-18 | Method for improving sub-synchronous oscillation (SSO) damping of thermal power plant by utilizing fan supplementary controller |
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| Publication Number | Publication Date |
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| CN102684209A CN102684209A (en) | 2012-09-19 |
| CN102684209B true CN102684209B (en) | 2014-09-10 |
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| CN104037788B (en) * | 2014-06-16 | 2016-02-10 | 东南大学 | Wind fire bundling system useable control device and method thereof |
| US9941828B2 (en) * | 2015-02-27 | 2018-04-10 | General Electric Company | System and method for stabilizing sub-synchronous interaction of a wind turbine generator |
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