CN110350602A - Participate in the blower fan control system of power grid frequency modulation - Google Patents
Participate in the blower fan control system of power grid frequency modulation Download PDFInfo
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- CN110350602A CN110350602A CN201810291897.6A CN201810291897A CN110350602A CN 110350602 A CN110350602 A CN 110350602A CN 201810291897 A CN201810291897 A CN 201810291897A CN 110350602 A CN110350602 A CN 110350602A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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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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- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The present invention provides a kind of blower fan control systems for participating in power grid frequency modulation, comprising: virtual inertia control unit inputs as mains frequency and frequency reference, exports and instruct increment for active power；Torque controlling unit is inputted as blower output power and blower current rotating speed, is exported as blower torque reference value；Active power controller unit inputs and instructs increment, the blower torque reference value, the blower current rotating speed and blower initial speed for the active power, exports as active power reference value；Award setting unit is inputted as wind speed round deviation and/or blower active power deviation, is exported as blower propeller pitch angle.The blower fan control system provided by the invention for participating in power grid frequency modulation, under the premise of guaranteeing blower stable operation and not deteriorating mains frequency, adjust rotation speed of fan and propeller pitch angle, take full advantage of the kinetic energy of blower rotation, and then avoid blower from subtracting power output operation in virtual inertia control whole process, blower is improved to mains frequency supporting role.
Description
Technical field
The present invention relates to technical field of wind power generation, especially a kind of blower fan control system for participating in power grid frequency modulation.
Background technique
As the permeability of wind-powered electricity generation in the power system is higher and higher, especially it is defeated to be directly accessed high pressure for large-scale wind power field
After power grid, wind-powered electricity generation brings very important influence to all various aspects such as the management and running of electric system and safety and stability.
Critical issue among these first is that influence to power system frequency and how to be carried out containing big rule after large-scale wind power access
The frequency control of mould wind-powered electricity generation electric system is to maintain frequency level required by electric system.
The virtual inertia control of wind-powered electricity generation refers to the addition system frequency response link in blower fan control system, when system frequency becomes
When change, rotation function is converted into power grid or by certain electric energy by the certain rotation function of release, thus in a short time
The active power output of blower is increasedd or decreased, inertial response and the primary frequency modulation response of conventional synchronization generating set is simulated, participates in
Power system frequency control participates in power system frequency control.
Under virtual inertia control, if system occurrence frequency falls, blower can discharge kinetic energy to increase power output.Virtual inertia
After control, rotation speed of fan will be less than optimized rotating speed.In order to be restored to optimized rotating speed, the electromagnetic power of blower is in additional issue power
After need to reduce, and the electromagnetic power of blower need to be reduced to operating status more smaller than Current mechanical power, so that on rotation speed of fan
It rises.Since current revolving speed is detached from optimized rotating speed, the mechanical output of blower is lower than initial mechanical power, that is, restoring in revolving speed
The active power of output in stage, blower need to be less than the active power initially exported.
Generally speaking, conventional virtual inertia control provides frequency support in the power additional issue stage, but restores rank in revolving speed
Section then needs to subtract power output operation, and blower active power of output is less than initial active power of output, in the higher situation of wind-powered electricity generation ratio
The lower recovery that can deteriorate mains frequency, in some instances it may even be possible to cause the secondary of system frequency to fall, be brought to operation of power networks certain
Risk.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of blower fan control systems for participating in power grid frequency modulation, and blower is avoided to subtract
Power output operation makes the virtual inertia control whole process of blower there is no mains frequency phenomenon is deteriorated, eliminates operation risk, while again
It can be improved to mains frequency enabling capabilities.
The present invention provides a kind of blower fan control systems for participating in power grid frequency modulation, comprising:
Virtual inertia control unit, inputs as mains frequency fgridWith frequency reference fref, export as active power instruction
Increment Delta P；
Torque controlling unit inputs as blower output power PeWith blower current rotating speed ωgen, export as blower torque ginseng
Examine value Tref；
Active power controller unit inputs and instructs increment Delta P, the blower torque reference value T for the active powerref、
The blower current rotating speed ωgenWith blower initial speed ωgen0, export as active power reference value Pref；
Award setting unit is inputted as wind speed round deviation and/or blower active power deviation, is exported as blower pitch
Angle；
The virtual inertia control unit, the torque controlling unit and the active power controller unit have for issuing additional
Function power, the award setting unit, for restoring rotation speed of fan after issuing additional active power.
Wherein, the virtual inertia control unit includes:
First computing module, for calculating the mains frequency fgridWith the frequency reference frefDifference, obtain electricity
Net frequency departure ferr；
Dead zone module is used for the mains frequency deviation ferrWith a particular value fdbCompare, if the mains frequency deviation
ferrLess than the particular value fdb, the mains frequency deviation ferrIt is 0；If the mains frequency deviation ferrIt is specific greater than described
Value fdb, the mains frequency deviation ferrNumerical value is constant；
Filter module, for will be by the mains frequency deviation f after the dead zone moduleerrSmoothing processing；
Gain module, according to gain coefficient KDTo the mains frequency deviation f after the filter moduleerrGain
Processing；
Blocking module, for the mains frequency deviation f after the gain moduleerrBlocking processing；
Clipping module, for the mains frequency deviation f after the blocking moduleerrAmplitude limiting processing, and export
The active power instructs increment Delta P.
Further, in the gain module, the gain coefficient KDBy the mains frequency fgridSuccessively by measuring ring
Section, differentiation element, link of tabling look-up obtain.
Further, in the link of tabling look-up, the mains frequency fgridChange rate be less than X1 when, the gain coefficient
KD=Y1；The mains frequency fgridChange rate be more than or equal to 0 when, the gain coefficient KD=Y0, wherein described X1, Y1 and
Y0 is modifiable parameter.
Further, the torque controlling unit includes:
Rotary speed parameter value computing module, for according to the blower output power PeRotation speed of fan reference value is calculated
ωref；
Second computing module, for calculating the blower current rotating speed ωgenWith the rotation speed of fan reference value ωrefDifference
Value, obtains the first revolving speed deviation ω 'err_trq；
Speed error signal processing module, for the first revolving speed deviation ω 'err_trqProcessing, obtains the second revolving speed
Deviation ωerr_trq；
PI control module, for the second revolving speed deviation ωerr_trqProcessing, obtains the blower torque reference value
Tref。
Further, the calculation method in the rotary speed parameter value computing module are as follows:
Wherein, K1, K2, K3, K4 and K5 are modifiable parameter in calculation method.
Further, in second computing module, the rotation speed of fan reference value ωrefBy a long-time inertia
Link and the blower current rotating speed ωgenIt makes the difference, obtains the first revolving speed deviation ω 'err_trq。
Further, in the long-time inertial element, inertial element time constantRepresentative value is 60s.
Further, the speed error signal processing module, to the first revolving speed deviation ω 'err_trqProcessing method
It is as follows:
As the mains frequency deviation ferrLess than the particular value fdbWhen, the second revolving speed deviation ωerr_trqEqual to institute
State the first revolving speed deviation ω 'err_trq；
As the mains frequency deviation ferrMore than or equal to the particular value fdbWhen, the first revolving speed deviation ω 'err_trq
The second revolving speed deviation ω need to be obtained by dead zone linkerr_trq, dead zone coefficient is ωdb, it may be assumed that
Further, the active power controller unit includes:
Blower active power reference value signal processing module, according to the blower torque reference value Tref, the blower it is current
Rotational speed omegagenWith blower initial speed ωgen0, obtain current active power Pfre_trq；
Third computing module, to the current active power Pfre_trqWith active power instruction increment Delta P summation, obtain
To the active power reference value Pref。
Further, in the blower active power reference value signal processing module, as the mains frequency deviation ferrGreatly
In the particular value fdbWhen, and the second revolving speed deviation ωerr_trqWhen less than or equal to 0, Pfre_trq=Tref*ωgen0；Other feelings
Under condition, Pfre_trq=Tref*ωgen。
The blower fan control system provided by the invention for participating in power grid frequency modulation, when system frequency reduces, blower is in system frequency
Rate declines initial stage release blower rotary inertia, provides more active power outputs, reduces system frequency fall off rate and mention
High-frequency declines minimum value, and powerful support system frequency is restored, in rotation speed of fan Restoration stage, by reducing blower propeller pitch angle,
Blower non-firm power is discharged, the blower mechanical output of increase restores rotation speed of fan, while blower being avoided to subtract power output operation.It is protecting
Under the premise of demonstrate,proving blower stable operation and not deteriorating mains frequency, rotation speed of fan is adjusted, takes full advantage of the kinetic energy of blower rotation,
And then operation risk is eliminated there is no mains frequency phenomenon is deteriorated in virtual inertia control whole process, while improving to electricity
Net frequency enabling capabilities have certain economic benefit.In addition, the present invention is smaller to the change of blower fan control system, do not influence
Blower operates normally control, and it is not necessary to modify original air-blower control parameters, are easy to Project Realization.
Detailed description of the invention
Fig. 1 is the whole control block diagram for the blower fan control system that the present invention participates in power grid frequency modulation；
Fig. 2 is the schematic diagram of virtual inertia control unit in the present invention；
Fig. 3 be in the present invention in gain module according to gain coefficient KDIt tables look-up schematic diagram；
Fig. 4 is active power controller cell schematics in the present invention；
Fig. 5 is torque controlling unit schematic diagram in the present invention；
Fig. 6 is award setting cell schematics in the present invention；
Fig. 7 is simulation example structure chart in the present invention；
Fig. 8 is system frequency response comparison diagram in the present invention；
Fig. 9 is blower output power comparison diagram in the present invention；
Figure 10 is rotation speed of fan comparison diagram in the present invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
A kind of blower fan control system participating in power grid frequency modulation, as shown in Figure 1, being increased newly on the basis of former blower fan control system
Virtual inertia control unit, and to active power controller unit, torque controlling unit, the propeller pitch angle of speed-changing draught fan control system
Control unit is transformed, but change does not influence the original control function of blower, is easy to Project Realization and popularization.
Virtual inertia control unit, inputs as mains frequency fgridWith frequency reference fref, export as active power instruction
Increment Delta P；Torque controlling unit inputs as blower output power PeWith blower current rotating speed ωgen, export as blower torque ginseng
Examine value Tref；Active power controller unit inputs and instructs increment Delta P, the blower torque reference value T for the active powerref、
The blower current rotating speed ωgenWith blower initial speed ωgen0, export as active power reference value Pref；Award setting list
Member is inputted as wind speed round deviation and/or blower active power deviation, is exported as blower propeller pitch angle；The virtual inertia control
Unit, the torque controlling unit and the active power controller unit are for issuing additional active power, the award setting list
Member, for restoring rotation speed of fan after issuing additional active power.
Virtual inertia control unit is as shown in Figure 2, comprising: the first computing module, for calculating the mains frequency fgrid
With the frequency reference frefDifference, obtain mains frequency deviation ferr；Dead zone module is used for the mains frequency deviation
ferrWith a particular value fdbCompare, if the mains frequency deviation ferrLess than the particular value fdb, the mains frequency deviation
ferrIt is 0；If the mains frequency deviation ferrGreater than the particular value fdb, the mains frequency deviation ferrNumerical value is constant；Dead zone
Module, so that the biggish frequency departure of virtual inertia control response, avoids controller frequent movement；Filter module, for will be through
Mains frequency deviation f after crossing the dead zone moduleerrSmoothing processing；Gain module, according to gain coefficient KDTo by the filter
The mains frequency deviation f after wave moduleerrGain process；Blocking module, for described in after the gain module
Mains frequency deviation ferrBlocking processing；Blocking module may make the virtual inertia control of blower to be not responding to steady frequency, only respond
Frequency dynamic change procedure, is not responding to steady frequency；Clipping module, for the power grid frequency after the blocking module
Rate deviation ferrAmplitude limiting processing, and export the active power instruction increment Delta P.Clipping module can limit active power instruction and increase
The size for measuring Δ P avoids blower additional issue from causing rotation speed of fan decline too fast too much.
In one optional embodiment of the present embodiment, as shown in Fig. 2, virtually in the gain module in inertia control unit,
The gain coefficient KDBy the mains frequency fgridSuccessively obtained by measurement link, differentiation element, link of tabling look-up.
In one optional embodiment of the present embodiment, as shown in figure 3, in the link of tabling look-up, the mains frequency fgrid
Change rate be less than X1 when, the gain coefficient KD=Y1；The mains frequency fgridChange rate be more than or equal to 0 when, the increasing
Beneficial COEFFICIENT KD=Y0, wherein described X1, Y1 and Y0 are modifiable parameter.Gain coefficient KDIt is related to mains frequency change rate
Variable coefficient, effect is to be set as biggish gain coefficient when mains frequency fall off rate is larger, reach mitigate power grid frequency
The purpose of rate fall off rate.
In one optional embodiment of the present embodiment, as shown in figure 5, the torque controlling unit includes:
Rotary speed parameter value computing module, for according to the blower output power PeRotation speed of fan reference value is calculated
ωref；
Second computing module, for calculating the blower current rotating speed ωgenWith the rotation speed of fan reference value ωrefDifference
Value, obtains the first revolving speed deviation ω 'err_trq；
Speed error signal processing module, for the first revolving speed deviation ω 'err_trqProcessing, obtains the second revolving speed
Deviation ωerr_trq；
PI control module, for the second revolving speed deviation ωerr_trqProcessing, obtains the blower torque reference value
Tref。
Wherein, in an optional embodiment of rotary speed parameter value computing module, calculation method are as follows:
Wherein, K1, K2, K3, K4 and K5 are modifiable parameter in calculation method.
In one optional embodiment, K1=1.2, K2=0.46, K3=-0.75, K4=1.59, K5=0.63 are calculated
Method are as follows:
In one optional embodiment of the second computing module, the rotation speed of fan reference value ωrefIt is used by a long-time
Property the link and blower current rotating speed ωgenIt makes the difference, obtains the first revolving speed deviation ω 'err_trq.The long-time inertia
In link, inertial element time constantIt is generally large, it is preferable that inertial element time constantFor 60s.
In one optional embodiment of the speed error signal processing module, to the first revolving speed deviation ω 'err_trq
Processing method is as follows:
As the mains frequency deviation ferrLess than the particular value fdbWhen, the second revolving speed deviation ωerr_trqEqual to institute
State the first revolving speed deviation ω 'err_trq；
As the mains frequency deviation ferrMore than or equal to the particular value fdbWhen, the first revolving speed deviation ω 'err_trq
The second revolving speed deviation ω need to be obtained by dead zone linkerr_trq, dead zone coefficient is ωdb, it may be assumed that
Dead zone coefficient ωdbEffect be to avoid rotation speed of fan decline too many, lead to not restore, the second revolving speed deviation
ωerr_trqBlower torque reference value T is obtained by PI control moduleref, it is therefore an objective to during both having guaranteed power additional issue, do not reduce wind
Machine torque reference value Tref, active power more as far as possible is exported, can also be reduced when revolving speed deviation is excessive by PI control module
Blower torque reference value Tref, reduce power output, prevent rotation speed of fan from continuing to decline, can not restore.
In one optional embodiment of the present embodiment, as shown in figure 4, active power controller unit includes:
Blower active power reference value signal processing module, according to the blower torque reference value Tref, the blower it is current
Rotational speed omegagenWith blower initial speed ωgen0, obtain current active power Pfre_trq；
Third computing module, to the current active power Pfre_trqWith active power instruction increment Delta P summation, obtain
To the active power reference value Pref, active power reference value PrefAfter being further processed, watt current control instruction can be obtained
Wherein, in an optional embodiment of the blower active power reference value signal processing module, as shown in figure 4,
As the mains frequency deviation ferrGreater than the particular value fdbWhen, and the second revolving speed deviation ωerr_trqWhen less than or equal to 0,
Pfre_trq=Tref*ωgen0；In the case of other, Pfre_trq=Tref*ωgen.Such processing may make and control in virtual inertia
Current active power P during workingfre_trqIt remains unchanged, simultaneously because the presence of active power instruction increment Delta P, system frequency
Rate can issue additional power in short-term during declining, improve the output of blower active power.
In one optional embodiment of the present embodiment, as shown in fig. 6, in award setting unit, the initial propeller pitch angle of blower
For θ0, controlling unit includes two branches of revolving speed deviation award setting and power deviation award setting.Wherein, revolving speed deviation
The input of award setting is wind speed round ωt, wind speed round reference value ωref；The input of power deviation award setting is paddle
Elongation controls current active power Pfre_trq, plant stand grade active power instruct Pord.The input of power deviation award setting is set as
The current active power P of active power controller linkfre_trq, when can avoid virtual inertia and working, power deviation propeller pitch angle control
Incorrect operation processed.
After the control of virtual inertia is worked, blower electromagnetic power is greater than blower mechanical output, and rotation speed of fan declines, at this time
Revolving speed deviation is negative, and award setting driving blower puts away the oars and (reduces propeller pitch angle), to improve blower mechanical output, slows down blower
Revolving speed decline, reaches and restores rotation speed of fan purpose, in addition to the reforming processing of direct torque link and active power link, so that
In certain rotation speed of fan decline range, blower active power of output is not less than initial active power of output always, avoids frequency
It is secondary to fall.
Beneficial effect verifying:
The feasibility and validity for proposing the blower fan control system of participation power grid frequency modulation to illustrate the invention, are based on Fig. 7
Shown example carries out simulating, verifying, and wherein LOAD is power grid equivalent load, and SYSTEM is power grid equivalent generator, and genA is wind-powered electricity generation
?.Wind power plant accesses power grid by transformer, transmission line.Simulation comparison wind power plant, which does not enable, simultaneously proposes virtual inertia control and opens
The influence to states such as system frequencies is controlled with virtual inertia.
It is as follows to emulate original state: equivalent load active power is 10p.u., and reactive power is 1.5p.u. (reference capacity
For 100MW), the output of equivalent generator active power is 9p.u., reactive power 1.52p.u., and active power of wind power field is
1p.u., initial propeller pitch angle are 1.1139 °.
15% power supply of grid loss is set, the comparison of system frequency dynamic response as shown in fig. 7, enable the control of virtual inertia can
Mains frequency fall off rate is effectively reduced, while mains frequency decline minimum is 48.76Hz, relative to the virtual inertia of not enabled
The 48.5Hz of control, improves 0.26Hz.Power Output for Wind Power Field is as shown in figure 8, enable the blower of virtual inertia control in electricity
The initial stage of net frequency decline provides the active power that peak value is 1.175p.u., power increment 0.175p.u., and not enabled
The blower of virtual inertia control provides the active power that peak value is 1.05p.u., power increment at the initial stage that mains frequency declines
Only 0.05p.u..
Rotation speed of fan is as shown in figure 9, to enable the blower of the virtual inertia control rotation speed of fan during the movement of virtual inertia first
Reduce, discharge rotation function, improve blower active power output, comparison diagram 8, in revolving speed recovery process, blower it is active
Power output is still greater than initial active power, avoids that system frequency is secondary to be fallen.Enable the blower of virtual inertia control
Mechanical output and electromagnetic power comparison diagram are as shown in Figure 10, during power of fan is issued additional, by reducing blower propeller pitch angle, improve wind
Machine mechanical output, avoids rotation speed of fan from continuing to decline.
Experiments prove that the blower fan control system proposed by the invention for participating in power grid frequency modulation, when system frequency reduces,
More active power outputs are provided, system frequency fall off rate is reduced and improve frequency decline minimum value, powerful support system frequency
Rate is restored, and in rotation speed of fan Restoration stage, blower is avoided to subtract power output operation.
The scope of protection of the present invention is not limited to this.Those skilled in the art are made equivalent on the basis of the present invention
Substitution or transformation, it is within the scope of the present invention.Protection scope of the present invention is subject to claims.
Claims (10)
1. a kind of blower fan control system for participating in power grid frequency modulation characterized by comprising
Virtual inertia control unit, inputs as mains frequency fgridWith frequency reference fref, export and instruct increment for active power
ΔP；
Torque controlling unit inputs as blower output power PeWith blower current rotating speed ωgen, export as blower torque reference value
Tref；
Active power controller unit inputs and instructs increment Delta P, the blower torque reference value T for the active powerref, it is described
Blower current rotating speed ωgenWith blower initial speed ωgen0, export as active power reference value Pref；
Award setting unit is inputted as wind speed round deviation and/or blower active power deviation, is exported as blower propeller pitch angle；
The virtual inertia control unit, the torque controlling unit and the active power controller unit are for issuing additional wattful power
Rate, the award setting unit, for restoring rotation speed of fan after issuing additional active power.
Wherein, the virtual inertia control unit includes:
First computing module, for calculating the mains frequency fgridWith the frequency reference frefDifference, obtain power grid frequency
Rate deviation ferr；
Dead zone module is used for the mains frequency deviation ferrWith a particular value fdbCompare, if the mains frequency deviation ferr
Less than the particular value fdb, the mains frequency deviation ferrIt is 0；If the mains frequency deviation ferrGreater than the particular value
fdb, the mains frequency deviation ferrNumerical value is constant；
Filter module, for will be by the mains frequency deviation f after the dead zone moduleerrSmoothing processing；
Gain module, according to gain coefficient KDTo the mains frequency deviation f after the filter moduleerrGain process；
Blocking module, for the mains frequency deviation f after the gain moduleerrBlocking processing；
Clipping module, for the mains frequency deviation f after the blocking moduleerrAmplitude limiting processing, and described in output
Active power instructs increment Delta P.
2. participating in the blower fan control system of power grid frequency modulation as described in claim 1, which is characterized in that in the gain module,
The gain coefficient KDBy the mains frequency fgridSuccessively obtained by measurement link, differentiation element, link of tabling look-up.
3. participating in the blower fan control system of power grid frequency modulation as claimed in claim 2, which is characterized in that in the link of tabling look-up,
The mains frequency fgridChange rate be less than X1 when, the gain coefficient KD=Y1；The mains frequency fgridChange rate it is big
When being equal to 0, the gain coefficient KD=Y0, wherein described X1, Y1 and Y0 are modifiable parameter.
4. participating in the blower fan control system of power grid frequency modulation as described in claim 1, which is characterized in that the torque controlling unit
Include:
Rotary speed parameter value computing module, for according to the blower output power PeRotation speed of fan reference value ω is calculatedref；
Second computing module, for calculating the blower current rotating speed ωgenWith the rotation speed of fan reference value ωrefDifference,
Obtain the first revolving speed deviation ω 'err_trq；
Speed error signal processing module, for the first revolving speed deviation ω 'err_trqProcessing, obtains the second revolving speed deviation
ωerr_trq；
PI control module, for the second revolving speed deviation ωerr_trqProcessing, obtains the blower torque reference value Tref。
5. participating in the blower fan control system of power grid frequency modulation as claimed in claim 4, which is characterized in that the rotary speed parameter value meter
Calculate the calculation method in module are as follows:
Wherein, K1, K2, K3, K4 and K5 are modifiable parameter in calculation method.
6. participating in the blower fan control system of power grid frequency modulation as claimed in claim 4, which is characterized in that second computing module
In, the rotation speed of fan reference value ωrefBy a long-time inertial element and the blower current rotating speed ωgenIt makes the difference, obtains
To the first revolving speed deviation ω 'err_trq。
7. participating in the blower fan control system of power grid frequency modulation as claimed in claim 6, which is characterized in that the long-time inertia rings
In section, inertial element time constantRepresentative value is 60s.
8. participating in the blower fan control system of power grid frequency modulation as claimed in claim 4, which is characterized in that the speed error signal
Processing module, to the first revolving speed deviation ω 'err_trqProcessing method is as follows:
As the mains frequency deviation ferrLess than the particular value fdbWhen, the second revolving speed deviation ωerr_trEqual to described
One revolving speed deviation ω 'err_trq；
As the mains frequency deviation ferrMore than or equal to the particular value fdbWhen, the first revolving speed deviation ω 'err_trqNeed through
It crosses dead zone link and obtains the second revolving speed deviation ωerr_trq, dead zone coefficient is ωdb, it may be assumed that
9. participating in the blower fan control system of power grid frequency modulation as claimed in claim 4, which is characterized in that the active power controller
Unit includes:
Blower active power reference value signal processing module, according to the blower torque reference value Tref, the blower current rotating speed
ωgenWith blower initial speed ωgen0, obtain current active power Pfre_trq；
Third computing module, to the current active power Pfre_trqWith active power instruction increment Delta P summation, institute is obtained
State active power reference value Pref。
10. participating in the blower fan control system of power grid frequency modulation as claimed in claim 9, which is characterized in that the blower wattful power
In rate reference value signal processing module, as the mains frequency deviation ferrGreater than the particular value fdbWhen, and second revolving speed
Deviation ωerr_trqWhen less than or equal to 0, Pfre_trq=Tref*ωgen0；In the case of other, Pfre_trq=Tref*ωgen。
Priority Applications (1)
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| CN113890062A (en) * | 2021-10-18 | 2022-01-04 | 中国华能集团清洁能源技术研究院有限公司 | Method for controlling primary frequency modulation power of wind generating set |
| CN117856358A (en) * | 2024-03-06 | 2024-04-09 | 昆明理工大学 | Wind turbine generator frequency adjustment and inertia control method and system based on phase-locked loop |
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