CN107465212A - Wind turbines microgrid operation virtual inertia control system and method based on virtual synchronous generator techniques - Google Patents
Wind turbines microgrid operation virtual inertia control system and method based on virtual synchronous generator techniques Download PDFInfo
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- CN107465212A CN107465212A CN201710874579.8A CN201710874579A CN107465212A CN 107465212 A CN107465212 A CN 107465212A CN 201710874579 A CN201710874579 A CN 201710874579A CN 107465212 A CN107465212 A CN 107465212A
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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
- H02J3/38—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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- 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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H02J3/386—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Wind Motors (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses the operation virtual inertia control system of the Wind turbines microgrid based on virtual synchronous generator techniques and method, use for reference virtual synchronous generator techniques on going result, module is given by adding additional droop characteristic, design energy storage device autonomous control algorithm and power, blower fan group virtual inertia, energy storage device virtual inertia and VSG inertial responses are cooperated, virtual inertia algorithm is successfully managed and is difficult to compatibling problem with maximal power point tracking algorithm couples, with energy storage algorithm.The present invention can successfully manage various wind speed and load changing problems, limiting AC side frequency discontinuity amplitude, strengthen the autonomous regulating power of micro-grid system, help to expand the contribution that wind power plant adjusts source net G system stability and frequency.Also, it need not be exceeded the speed limit in advance or the measure such as off-load, it is not necessary to add award setting, energy storage device utilization rate and wind energy utilization can be effectively improved.
Description
Technical field
Sent out the present invention relates to a kind of virtual inertia control method of distributed micro-grid system, more particularly to based on virtual synchronous
The Wind turbines microgrid operation virtual inertia control method and system of motor technology, belong to distributed power generation microgrid field.
Background technology
With the fast development of distributed power source and microgrid, new energy power generation technology not only needs to face the energy and hair
The electric technical barrier of itself, with greater need for response and the performance for considering source-net-G system overall structure and its each side.
In recent years, the utilization rate Continued of regenerative resource, the intermittence of the energy, fluctuation, particularity and customer charge
Diversity, dynamic, and the extensive access of the new load such as electric automobile, frequency control, make conventional synchronization generator in power network
Installation ratio gradually reduce, spinning reserve capacity and rotary inertia are relative to be reduced, and the stability to source-net-G system is brought
Huge challenge.
In traditional wind power plant, combining inverter uses P/Q type Double-loop Control Strategies more.Although this algorithm can be stablized
Convey the power that maximal power point tracking (Maximum Power Point Tracking, MPPT) algorithm obtains, but Wind turbines
Rotating speed with exchange that lateral load is full decoupled, micro-grid system is turned into an isolated constant power source, it will system is lost completely
Lose the interaction to alternating voltage and enabling capabilities.When AC load is mutated, chugging is all by same caused by sudden load change
Step generator and power network undertake, and cause AC frequency to decline, and threaten the stability of micro-grid system, synchronous generator and power network.
And the power output of blower fan group is constant, sudden load change will not be responded, almost has no to contribute for the regulation of AC frequency.Therefore,
Interaction capability of the Wind turbines to power network and load is how improved, strengthens the stability of source-net-G system, builds " power network close friend
Type " wind power plant is the important topic that current new energy development utilizes.
In recent years, scholar proposes virtual synchronous generator (Virtual Synchronous Generator, VSG) skill
Art.The technology fully merges Power Electronic Technique advantage and conventional synchronization generator operation feature, makes the algorithm of combining inverter
Design can refer to the theoretical and conventional operating experience of synchronous generator.Its own possesses inertial response and primary frequency modulation characteristic, can have
Effect improves and the inertia of network interface and damping, mitigates burden of the AC load mutation to power network.VSG technologies are introduced to distributed electrical
Source system, can effectively solve the problem of its close friend's consumption, and have broad application prospects.
The content of the invention
The technical problems to be solved by the invention are to provide the Wind turbines microgrid fortune based on virtual synchronous generator techniques
Row virtual inertia control method and system, VSG technology novelty achievements are used for reference, by adding additional droop characteristic, design energy storage fills
Put autonomous control strategy and power gives module, it is virtual to give full play to blower fan group virtual inertia, energy storage device virtual inertia and VSG
Inertia, successfully manage virtual inertia algorithm and be difficult to compatibling problem with maximal power point tracking algorithm couples, with energy storage algorithm.The present invention
Various wind speed and load changing problems can be successfully managed, limiting AC side frequency discontinuity amplitude, strengthen micro-grid system from main regulation
Ability, help to expand the contribution that wind power plant adjusts source net G system stability and frequency.Also, it need not be surpassed in advance
The measure such as speed or off-load, it is not necessary to add award setting, energy storage device utilization rate and wind energy utilization can be effectively improved.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
On the one hand, the invention provides the Wind turbines microgrid based on virtual synchronous generator techniques to run virtual inertia control
System processed, the system include wind energy conversion system, blower fan group, pusher side inverter, energy storage device, DC/DC converters, dc bus, net
Side inverter, transformer, AC load and its sensor, filter capacitor, maximal power point tracking module, blower fan group control module,
Autonomous control module, power give module, blower fan group virtual inertia control module, virtual synchronous alternator control modules.
The wind energy conversion system is sequentially connected electrically with the blower fan group, pusher side inverter, filter capacitor, dc bus, the storage
Energy device is sequentially connected electrically with the DC/DC converters, filter capacitor, dc bus, the dc bus and the filtered electrical
Appearance, net side inverter, transformer, AC load and its sensor are sequentially connected electrically；
The maximal power point tracking module is connected with the blower fan group control module, and output signal is used to drive pusher side inversion
Device；The autonomous control module is used to drive DC/DC converters；The maximal power point tracking module, autonomous control module, blower fan
Group virtual inertia control module and the power give module and are connected, the power gives module, at AC load sensor and
The virtual synchronous alternator control modules are connected, and output signal is used to drive net side inverter.
On the other hand, the invention provides the Wind turbines microgrid based on virtual synchronous generator techniques to run virtual inertia
Control method, methods described specifically include：
S1, start wind energy conversion system, blower fan group, blower fan group control module and pusher side inverter, complete building for blower fan group and press through journey
And stable DC busbar voltage；
S2, access network side inverter, start virtual synchronous alternator control modules, make net side inverter no-load running, adjust
Save AC output voltage；
S3, start maximal power point tracking module, access transformer, AC load and its sensor, now system is to exchange
Load provides energy；
S4, by energy storage device and DC/DC converter access systems, start autonomous control module, blower fan group virtual inertia control
Molding block and power give module, system stable operation；
S5, detect that AC load is mutated, blower fan group virtual inertia module provides temporary with blower fan group rotor kinetic energy automatically
State virtual inertia supports, and wind generating unit speed enters transient state regulation process；
S6, detect that wind speed mutation or AC frequency discontinuity exceed setting range, autonomous control module automatically adjusts micro-
Net internal system power-balance, continuation regulation AC frequency discontinuity amplitude.
Further, autonomous control module described in the S4 is specially the Hysteresis control strategy based on buck-boost,
According to AC difference on the frequency, automatically select buck patterns or boost patterns and export corresponding power, promote power in micro-grid system
Balance.
Further, blower fan group virtual inertia control module described in the S4 is specially in virtual synchronous generator control
Additional droop characteristic is added during the power of module is given to strengthen the equivalent sagging coefficient of virtual synchronous alternator control modules,
The rotor kinetic energy of blower fan group is absorbed or discharged in the transient process of AC load mutation, to provide the support of transient state virtual inertia.
Further, it is virtual to comprehensive blower fan group virtual inertia and energy storage device to give module for power described in the S4
Inertia properties, provide the support of blower fan group virtual inertia during system transient modelling, and it is virtual that energy storage device is exported during systematic steady state
Inertial supports, with reference to maximal power point tracking algorithm power output, automatically generate the power of virtual synchronous alternator control modules to
It is fixed.
Beneficial effects of the present invention：
The negative effect of wind speed and load changing problem to power network in the case of 1. the present invention effectively can suppress various, limitation is handed over
Side frequency discontinuity amplitude is flowed, strengthens the autonomous regulating power of micro-grid system.
2. the present invention cooperates blower fan group virtual inertia, energy storage device virtual inertia and VSG inertial responses, mitigate negative
Lotus accesses and influence of the sudden load increase to synchronous generator and power network, help to expand wind power plant to source net G system stability and
The contribution of frequency regulation.
3. the present invention can successfully manage virtual inertia algorithm be difficult to maximal power point tracking algorithm couples, with energy storage algorithm it is simultaneous
Appearance problem, make virtual inertia control algolithm independently of each other and can cooperate, collectively form an entirety.
4. the present invention can make energy storage device be provided simultaneously with virtual inertia enabling capabilities and energy storage capacity, in complicated running environment
In will not produce logical miss, it is possible to provide energy storage device utilization rate.
5. the present invention need not be exceeded the speed limit in advance or the measure such as off-load, it is not necessary to adds award setting, control structure
It is simple and reliable.
Brief description of the drawings
Fig. 1 is the main circuit structure block diagram of the present invention；
Fig. 2 is the energy storage device autonomous control algorithm schematic diagram of the present invention；
Fig. 3 is the additional droop characteristic schematic diagram of the present invention；
The power that Fig. 4 is the present invention gives module frame chart；
Fig. 5 is the virtual inertia control strategy entire block diagram of the present invention.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Embodiment 1, the Wind turbines microgrid operation virtual inertia control system based on virtual synchronous generator techniques.Below
It is described in detail with reference to Fig. 1 to Fig. 5 systems provided the present embodiment.
Referring to Fig. 1 to Fig. 5, the Wind turbines microgrid operation virtual inertia control system based on virtual synchronous generator techniques
System, it is characterised in that the system includes wind energy conversion system, blower fan group, pusher side inverter, energy storage device, DC/DC converters, direct current
Bus, net side inverter, transformer, AC load and its sensor, filter capacitor, maximal power point tracking module, blower fan group control
Molding block, autonomous control module, power give module, blower fan group virtual inertia control module, virtual synchronous generator control mould
Block.
The wind energy conversion system is sequentially connected electrically with the blower fan group, pusher side inverter, filter capacitor, dc bus, the storage
Energy device is sequentially connected electrically with the DC/DC converters, filter capacitor, dc bus, the dc bus and the filtered electrical
Appearance, net side inverter, transformer, AC load and its sensor are sequentially connected electrically；
The maximal power point tracking module is connected with the blower fan group control module, and output signal is used to drive pusher side inversion
Device；The autonomous control module is used to drive DC/DC converters；The maximal power point tracking module, autonomous control module, blower fan
Group virtual inertia control module and the power give module and are connected, the power gives module, at AC load sensor and
The virtual synchronous alternator control modules are connected, and output signal is used to drive net side inverter.Above-mentioned maximal power point tracking mould
Block is realized using the maximal power point tracking algorithm of conventional ripening, mainly by the approximate control of Wind turbine power output in the present embodiment
The cube for being made as wind speed is realized again；Blower fan group control module select outer voltage current inner loop twin nuclei, the blower fan and
Its a whole set of control algolithm topological structure is referring to patent document (Application No. 201410643081.7).
Embodiment 2, the Wind turbines microgrid operation virtual inertia control method based on virtual synchronous generator techniques.Below
It is described in detail with reference to Fig. 1 to Fig. 5 methods provided the present embodiment.
Referring to Fig. 1 to Fig. 5, the Wind turbines microgrid operation virtual inertia controlling party based on virtual synchronous generator techniques
Method, methods described specifically include：
S1, start wind energy conversion system, blower fan group, blower fan group control module and pusher side inverter, complete building for blower fan group and press through journey
And stable DC busbar voltage；
Specifically, wind energy conversion system mathematical modeling is as follows
Wherein, TmFor wind energy conversion system torque, ρ is atmospheric density, and A is swept area of rotor, VwindFor wind speed, Cp(λ, β) is wind
Can usage factor, λ is tip speed ratio, and β is paddle pitch angle, ωrFor rotating speed, R is wind wheel radius.
The building of blower fan group described in the S1 presses through journey and specifically referred to, after wind generating unit speed is more than initial speed, rotating speed
Will slowly it rise, now DC bus-bar voltage is raised slowly to set-point in the form of ramp function in blower fan group control algolithm,
Journey is pressed through so as to complete building for DC bus-bar voltage.
S2, access network side inverter, start virtual synchronous alternator control modules, make net side inverter no-load running, adjust
Save AC output voltage；
Specifically, the mathematical modeling of VSG control modules is as follows：
Wherein, P*、Q*To be active and idle given, Dp、DqFor frequency-active and voltage-idle sagging coefficient, P, Q are to have
Work(and idle feedback, J, K are the inertia coeffeicent of active ring and idle ring, ω*, ω be specified angular rate and rotor electric angle speed
Degree, V*, V be rated voltage amplitude and output voltage amplitude, θ is now rotor position angle.
It is specially to add presynchronization algorithm that AC output voltage is adjusted described in the S2, in virtual synchronous generator control
3 pi regulators are built in molding block, adjust amplitude, frequency and the phase of AC output voltage respectively.
Specifically, presynchronization control method principle is as follows：
As shown in above formula, in control algolithm add two integration make its respectively with active sagging coefficient and idle sagging system
Number forms two pi regulator regulation output voltage frequencies and angular speed, adds a pi regulator regulation output phase.
S3, start maximal power point tracking module, access transformer, AC load and its sensor, now system is to exchange
Load provides energy；
S4, by energy storage device and DC/DC converter access systems, start autonomous control module, blower fan group virtual inertia control
Molding block and power give module, system stable operation；
Autonomous control module described in the S4 is specially the Hysteresis control strategy based on buck-boost, according to AC
Difference on the frequency, automatically select buck patterns or boost patterns and export corresponding power, promote power-balance in micro-grid system.
It is illustrated in figure 2 energy storage device autonomous control strategy schematic diagram.
Maximal power point tracking module, energy storage device and VSG are connected, then active ring expression formula, which can arrange, is
Wherein, PmMachine torque, η are exported for wind energy conversion systemgFor wind unit efficiency, PscFor energy storage device power.
By equation (4) Suo Shi, when Wind speed up AC load is constant, the constant AC load bust of wind speed, Wind speed up are handed over
When power increment obtained by current load bust, Wind speed up is more than AC load power increment, Δ ω is negative, is required for storage
Can device storage excess energy.As shown in inner ring in Fig. 2, as | Δ ω | more than buck branch road set-points absolute value when, start
Buck branch roads, maintain the power-balance in microgrid.Similarly, when wind speed bust AC load is constant, the constant AC load of wind speed is dashed forward
When increasing, wind speed bust AC load are uprushed, power increment obtained by Wind speed up is less than AC load power increment, Δ ω is just
Number.As | Δ ω | more than boost branch road set-points absolute value when, start boost branch roads, energy storage device provides for micro-grid system
Power supports.Also, electricity consumption angular velocity difference connects VSG droop characteristics and energy storage device control algolithm.Use energy storage device
Power increment caused by sagging response is extracted, limits VSG droop characteristic response amplitudes, AC difference on the frequency mutational range is limited
In in given range, the imbalance power in micro-grid system is transferred in energy storage device.Therefore, this programme can improve energy storage dress
Utilization rate is put, it is provided simultaneously with energy storage effect and virtual inertia supporting role.
If energy storage device is just in storage energy, AC load is significantly uprushed, and energy needed for micro-grid system is more than wind speed institute
Can provide energy, now VSG droop characteristics Δ ω saltus steps will be made to be positive number, autonomous control algorithm will automatically switch to boost
Branch road, energy storage device start to provide corresponding power support for microgrid.Similarly, autonomous control algorithm can also be rapidly completed from
Switching of the boost branch roads to buck branch roads.
Blower fan group virtual inertia control module described in the S4 is specially the work(in virtual synchronous alternator control modules
Additional droop characteristic is added during rate is given to strengthen the equivalent sagging coefficient of virtual synchronous alternator control modules, in AC load
The rotor kinetic energy of blower fan group is absorbed or discharged in the transient process of mutation, to provide the support of transient state virtual inertia.
Additional droop characteristic is added on VSG active set-point as shown in Figure 3.When AC load is uprushed, AC
Frequency drop makes Δ ω sport positive number, and positive active given increment Delta P will be fictionalized moments by now adding droop characteristicg。
Due to the unsuitable Excessive sensitivity of energy storage device, sudden load change moment Δ P at dc bus in Fig. 1gRely primarily on and extract blower fan group work(
Rate obtains.According to traditional virtual inertia general principle, now blower fan group rotor will discharge kinetic energy.Similarly, when AC load is dashed forward
During drop, additional droop characteristic equally can efficiently use blower fan group rotor kinetic energy, strengthen transient performance.Therefore the algorithm need not add
Enter extra detection method, it is not necessary to the range of operation of complexity is derived, can real-time action promotion system transient power balance.
Additional droop characteristic expression formula is substituted into the active rings of VSG to represent to obtain
Abbreviation equation (5) can obtain
Therefore, droop characteristic is added equivalent to the equivalent frequency-active sagging coefficient for enhancing VSG, without disturbing VSG
Operation.When the timing of power difference one caused by load changing, equivalent sagging coefficient is bigger, then Δ ω is smaller, meets conventional synchronization
Generator operation experience.
Power described in the S4 gives module to integrate blower fan group virtual inertia and energy storage device virtual inertia performance,
The support of blower fan group virtual inertia is provided during system transient modelling, the support of energy storage device virtual inertia is exported during systematic steady state,
With reference to maximal power point tracking algorithm power output, the power for automatically generating virtual synchronous alternator control modules gives.
As shown in figure 4, transferring the rotor kinetic energy of blower fan group with additional droop characteristic, coordinate the quick-action of VSG inertial responses,
Virtual inertia support is provided in transient process, improves transient performance.The virtual used of energy storage device is transferred with autonomous control algorithm
Property, coordinate VSG droop characteristic, energy storage problem and virtual inertia problem is uniformly processed, the effectively control exchange in steady-state process
Side frequency discontinuity amplitude.Maximal power point tracking is introduced into power and gives module, coordinates virtual inertia control strategy, makes micro-grid system
Various wind speed mutation and AC load catastrophes can be flexibly tackled, lift the autonomous regulating power of micro-grid system, are improved micro-
Contribution of the net system to source-net-G system stability.
S5, detect that AC load is mutated, blower fan group virtual inertia module provides temporary with blower fan group rotor kinetic energy automatically
State virtual inertia supports, and wind generating unit speed enters transient state regulation process；
S6, detect that wind speed mutation or AC frequency discontinuity exceed setting range, autonomous control module automatically adjusts micro-
Net internal system power-balance, continuation regulation AC frequency discontinuity amplitude.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (8)
1. the Wind turbines microgrid operation virtual inertia control system based on virtual synchronous generator techniques, it is characterised in that institute
State system include wind energy conversion system, blower fan group, pusher side inverter, energy storage device, DC/DC converters, dc bus, net side inverter,
Transformer, AC load and its sensor, filter capacitor, maximal power point tracking module, blower fan group control module, autonomous control mould
Block, power give module, blower fan group virtual inertia control module, virtual synchronous alternator control modules；
The wind energy conversion system is sequentially connected electrically with the blower fan group, pusher side inverter, filter capacitor, dc bus, the energy storage dress
Put and be sequentially connected electrically with the DC/DC converters, filter capacitor, dc bus, the dc bus and the filter capacitor, net
Side inverter, transformer, AC load and its sensor are sequentially connected electrically；
The maximal power point tracking module is connected with the blower fan group control module, and output signal is used for driving machine side inverter；
The autonomous control module is used to drive DC/DC converters；The maximal power point tracking module, autonomous control module, blower fan group
Virtual inertia control module and the power give module and are connected, and the power gives module, sensor and institute at AC load
State virtual synchronous alternator control modules to be connected, output signal is used to drive net side inverter.
2. the Wind turbines microgrid operation virtual inertia control according to claim 1 based on virtual synchronous generator techniques
System, it is characterised in that the autonomous control module is specially the Hysteresis control based on buck-boost, according to AC frequency
Difference, automatically select buck patterns or boost patterns and export corresponding power, promote power-balance in micro-grid system.
3. the Wind turbines microgrid operation virtual inertia control according to claim 1 based on virtual synchronous generator techniques
System, it is characterised in that the blower fan group virtual inertia control module is specially the work(in virtual synchronous alternator control modules
Additional droop characteristic is added during rate is given to strengthen the equivalent sagging coefficient of virtual synchronous alternator control modules, in AC load
The rotor kinetic energy of blower fan group is absorbed or discharged in the transient process of mutation, to provide the support of transient state virtual inertia.
4. the Wind turbines microgrid operation virtual inertia control according to claim 1 based on virtual synchronous generator techniques
System, it is characterised in that the power gives module to integrate blower fan group virtual inertia and energy storage device virtual inertia performance,
The support of blower fan group virtual inertia is provided during system transient modelling, the support of energy storage device virtual inertia is exported during systematic steady state,
With reference to maximal power point tracking algorithm power output, the power for automatically generating virtual synchronous alternator control modules gives.
5. the Wind turbines microgrid operation virtual inertia control method based on virtual synchronous generator techniques, it is characterised in that institute
The method of stating specifically includes：
S1, start wind energy conversion system, blower fan group, blower fan group control module and pusher side inverter, complete building for blower fan group and press through Cheng Bingwen
Determine DC bus-bar voltage；
S2, access network side inverter, start virtual synchronous alternator control modules, make net side inverter no-load running, regulation is handed over
Flow side output voltage；
S3, start maximal power point tracking module, access transformer, AC load and its sensor, now system is to AC load
Energy is provided；
S4, by energy storage device and DC/DC converter access systems, start autonomous control module, blower fan group virtual inertia control mould
Block and power give module, system stable operation；
S5, detect that AC load is mutated, it is empty that blower fan group virtual inertia module provides transient state with blower fan group rotor kinetic energy automatically
Intend inertial supports, wind generating unit speed enters transient state regulation process；
S6, detect that wind speed mutation or AC frequency discontinuity exceed setting range, autonomous control module automatically adjusts microgrid system
Internal power of uniting balances, continuation regulation AC frequency discontinuity amplitude.
6. the Wind turbines microgrid operation virtual inertia controlling party based on virtual synchronous generator techniques as claimed in claim 5
Method, it is characterised in that autonomous control module described in the S4 is specially the Hysteresis control based on buck-boost, according to exchange
Side difference on the frequency, automatically select buck patterns or boost patterns and export corresponding power, promote power-balance in micro-grid system.
7. the Wind turbines microgrid operation virtual inertia controlling party based on virtual synchronous generator techniques as claimed in claim 5
Method, it is characterised in that blower fan group virtual inertia control module described in the S4 is specially in virtual synchronous generator control mould
Additional droop characteristic is added during the power of block is given to strengthen the equivalent sagging coefficient of virtual synchronous alternator control modules, is being handed over
The rotor kinetic energy of blower fan group is absorbed or discharged in the transient process of stream load mutation, to provide the support of transient state virtual inertia.
8. the Wind turbines microgrid operation virtual inertia controlling party based on virtual synchronous generator techniques as claimed in claim 5
Method, it is characterised in that power described in the S4 gives module and is virtually used to comprehensive blower fan group virtual inertia and energy storage device
Property performance, the support of blower fan group virtual inertia is provided during system transient modelling, energy storage device is exported during systematic steady state and is virtually used to
Property support, with reference to maximal power point tracking algorithm power output, the power for automatically generating virtual synchronous alternator control modules gives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710874579.8A CN107465212B (en) | 2017-09-25 | 2017-09-25 | Virtual inertia control system and method for wind turbine generator micro-grid operation based on virtual synchronous generator technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710874579.8A CN107465212B (en) | 2017-09-25 | 2017-09-25 | Virtual inertia control system and method for wind turbine generator micro-grid operation based on virtual synchronous generator technology |
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| Publication Number | Publication Date |
|---|---|
| CN107465212A true CN107465212A (en) | 2017-12-12 |
| CN107465212B CN107465212B (en) | 2020-06-09 |
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| CN108242815A (en) * | 2018-03-30 | 2018-07-03 | 华北电力科学研究院有限责任公司 | Fall the wind turbine energy storage supplied for power of fan and coordinate frequency modulation system and method |
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| CN108270241A (en) * | 2018-02-06 | 2018-07-10 | 国网四川省电力公司电力科学研究院 | The control method of wind turbine gird-connected inverter virtual synchronous generator |
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| CN109193797A (en) * | 2018-08-17 | 2019-01-11 | 江苏大学 | A kind of inertia matching method and control system based on synchronous generator and virtual synchronous parallel operation of generator microgrid |
| CN109630354A (en) * | 2018-12-06 | 2019-04-16 | 国网山东省电力公司潍坊供电公司 | Blower and synchronous machine collaboration frequency modulation method and system based on converter control under inertia control |
| CN110011354A (en) * | 2019-03-19 | 2019-07-12 | 江苏大学 | A method of the rapid pressure adjusting system based on virtual synchronous generator |
| CN110011354B (en) * | 2019-03-19 | 2024-05-28 | 江苏大学 | Method for rapid voltage regulating system based on virtual synchronous generator |
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