CN110492524A - Active-control method for frequency and system without the communication soft direct join net of marine wind electric field - Google Patents
Active-control method for frequency and system without the communication soft direct join net of marine wind electric field Download PDFInfo
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- CN110492524A CN110492524A CN201910671033.1A CN201910671033A CN110492524A CN 110492524 A CN110492524 A CN 110492524A CN 201910671033 A CN201910671033 A CN 201910671033A CN 110492524 A CN110492524 A CN 110492524A
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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
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
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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
Abstract
The invention discloses a kind of active-control method for frequency and system without the communication soft direct join net of marine wind electric field, the frequency signal of AC network access point on the bank is obtained first, generation DC voltage is converted by the frequency signal, and the direct voltage reference value as converter station on the bank, the output DC voltage value of converter station control on the bank are equal to direct voltage reference value；Marine converter station detects DC voltage value, is translated into frequency, obtains frequency reference；The frequency that marine converter station controls marine point of common coupling is equal to frequency reference；The second frequency signal of marine wind electric field acquisition offshore power grid；Active frequency modulation(PFM) is carried out to offshore wind farm based on frequency reference and second frequency signal, offshore wind farm can be achieved through the soft active-frequency control function for directly entering AC system on opposite bank, support AC system frequency modulation, without being communicated between soft straight onshore station and the station at marine station, without the soft directly communication between marine wind electric field, the reliability and the scope of application of control are improved.
Description
Technical field
The present invention relates to technical field of new energy power generation, specifically relate to a kind of having without the communication soft direct join net of marine wind electric field
Function-control method for frequency and system.
Background technique
Flexible HVDC transmission system is based on voltage source converter, has and commutation failure, independent control wattful power is not present
Rate and reactive power can provide effective solution to the advantages that passive network power supply for renewable energy is grid-connected.In recent years
With the fast development of domestic and international extensive, remote offshore wind farm, multiple off-lying sea flexible DC transmission engineerings are in planning rank
Section, future achievable offshore wind farm directly enter AC network on the bank through soft.The transmission power of wind power plant is larger, normally transports in power grid
The frequency of system has certain influence under capable and accident condition, need to be changed according to the frequency of AC system and adjust transmission power.To mention
High power grid overall performance, it is necessary to the algorithm for power modulation function based on frequency is introduced in flexible direct current system.
The DC power modulation for being currently based on frequency has engineer application in customary DC field, when a certain top-cross streaming system
Break down when frequency anomaly being caused to change, DC transmission system can the variation of quick response two sides frequency and change transmission power,
Quenching frequency control is carried out to support two sides exchange.In the prior art when changing transmission power based on frequency variation, need
Communications system transmission signal realizes control process, when communication system failure, then cannot respond to frequency variation and changes transmission of electricity function
Rate.
Summary of the invention
Therefore, it is provided by the invention it is a kind of without communication the soft direct join net of marine wind electric field active-control method for frequency and be
System, overcomes the prior art when communication system failure, then cannot respond to the defect that frequency changes and changes transmission power.
In a first aspect, the embodiment of the present invention provides a kind of active-frequency control without the communication soft direct join net of marine wind electric field
Method includes the following steps: the first frequency signal for obtaining AC network access point on the bank；The first frequency signal is converted
To generate DC voltage；Using DC voltage as the direct voltage reference value of converter station on the bank, control converter station control on the bank is defeated
DC voltage value is equal to the direct voltage reference value out；At sea converter station detects DC voltage value, is translated into frequency,
Obtain frequency reference；The frequency that marine converter station controls marine point of common coupling is equal to the frequency reference；Offshore wind farm
Field obtains the second frequency signal of offshore power grid；Had based on the frequency reference and second frequency signal to offshore wind farm
Function frequency modulation(PFM).
In one embodiment, described the step of obtaining the frequency signal of AC network access point on the bank, comprising: use locking phase
AC network accesses dot frequency to ring real-time measurement on the bank, and first frequency signal is generated after filtering processing.
In one embodiment, generation DC voltage is converted for the first frequency signal by following formula:
Vdc_ref-VDC0=(f-f0)*KDC
Wherein, Vdc_ref indicates the DC voltage value being converted into, VDC0Indicate initial direct voltage reference value, f table
Show first frequency signal, f0Indicate initial frequency reference, KDCFor the transformation ratio of frequency to voltage.
In one embodiment, it is calculated by the following formula to obtain frequency reference:
f_ref-f0=(Vdc-VDC0)*Kf
Wherein, f_ref indicates frequency reference, f0Indicate initial frequency reference, VdcIndicate marine converter station detection
DC voltage value, VDC0Indicate initial direct voltage reference value, KfFor the transformation ratio of DC voltage to frequency.
In one embodiment, the step of second frequency signal for obtaining offshore power grid, comprising: real-time using phaselocked loop
The frequency for measuring offshore power grid generates second frequency signal after filtering processing.
In one embodiment, described that active frequency is carried out to offshore wind farm based on the frequency reference and second frequency signal
The step of rate is modulated includes: the variable quantity for obtaining second frequency signal relative frequency reference value；According to preset ratio coefficient, first
Frequency signal and the converted quantity obtain active power regulation value；Marine wind electric field changes defeated according to the active power regulation value
Active power out.
In one embodiment, the active power regulation value is calculated by the following formula:
Δ P=KfΔf
Wherein, Δ P is active power regulation value, KfFor preset ratio coefficient, Δ f is second frequency signal relative frequency ginseng
Examine the variable quantity of value.
Second aspect, the embodiment of the present invention provide active-frequency control system without the communication soft direct join net of marine wind electric field,
It is characterised by comprising: first frequency signal acquisition module, the first frequency for obtaining AC network access point on the bank is believed
Number；Frequency/DC voltage conversion module, for converting generation DC voltage for the first frequency signal；Marine converter station
DC voltage value control module, for using DC voltage as the direct voltage reference value of converter station on the bank, control to be changed on the bank
The output DC voltage value at stream station is equal to the direct voltage reference value；Frequency reference obtains module, is used for the sea
The DC voltage value of converter station is converted into frequency, obtains frequency reference；Marine converter station point of common coupling frequency control module,
The frequency for controlling marine converter station point of common coupling for marine converter station is equal to the frequency reference；Second frequency signal obtains
Modulus block obtains the second frequency signal of offshore power grid for marine wind electric field；The active frequency modulation(PFM) module of offshore wind farm, is used for
Active frequency modulation(PFM) is carried out to offshore wind farm based on the frequency reference and second frequency signal.
In one embodiment, the active power and frequency control system of the marine wind electric field, further includes: mould is arranged in control parameter
Block, for control parameter to be arranged, comprising: the maximum value of frequency threshold, proportionality coefficient and active power adjustment.
The third aspect, the embodiment of the present invention provide a kind of computer equipment, comprising: at least one processor, and with institute
State the memory of at least one processor communication connection, wherein the memory is stored with can be by least one described processor
The instruction of execution, described instruction are executed by least one described processor, so that at least one described processor executes the present invention
Active-control method for frequency without the communication soft direct join net of marine wind electric field described in embodiment first aspect.
Fourth aspect, the embodiment of the present invention provide a kind of computer readable storage medium, the computer-readable storage medium
Matter is stored with computer instruction, and the computer instruction is for executing the computer described in inventive embodiments first aspect
Active-control method for frequency without the communication soft direct join net of marine wind electric field.
Technical solution of the present invention has the advantages that
One kind provided in an embodiment of the present invention having without the communication soft direct join net of marine wind electric field provided in an embodiment of the present invention
Function-control method for frequency and system obtain the frequency signal of AC network access point on the bank first, convert the frequency signal to
DC voltage, and the direct voltage reference value as converter station on the bank are generated, output DC voltage value of converter station control on the bank etc.
In direct voltage reference value；Marine converter station detects DC voltage value, is translated into frequency, obtains frequency reference；It is marine
The frequency that converter station controls marine point of common coupling is equal to the frequency reference；Marine wind electric field obtains the second of offshore power grid
Frequency signal；Active frequency modulation(PFM) is carried out, it can be achieved that sea turn to offshore wind farm based on frequency reference and second frequency signal
Electricity supports AC system frequency modulation through the soft active-frequency control function for directly entering AC system on opposite bank, is not necessarily to soft straight onshore station
It is communicated between the station at marine station, without the soft directly communication between marine wind electric field, improves the reliability of control and be applicable in
Range.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is that offshore wind farm provided in an embodiment of the present invention directly enters the frequency real power control based on direct frequency and show through soft
It is intended to；
Fig. 2 is one of active-frequency control provided in an embodiment of the present invention without the communication soft direct join net of marine wind electric field
The flow chart of specific example；
Fig. 3 is the frequency real power control transmission function block diagram provided in an embodiment of the present invention without communication；
Fig. 4 is transmission function schematic diagram of the frequency provided in an embodiment of the present invention to voltage conversion module；
Fig. 5 be DC voltage provided in an embodiment of the present invention to frequency conversion module transmission function schematic diagram；
Fig. 6 is that system high-frequency provided in an embodiment of the present invention response requires schematic diagram；
Fig. 7 is the schematic diagram of the waveform of AC system frequency on the bank provided in an embodiment of the present invention；
Fig. 8 is the schematic diagram of flexible direct current DC voltage waveform provided in an embodiment of the present invention；
Fig. 9 is the schematic diagram of offshore power grid frequency waveform provided in an embodiment of the present invention；
Figure 10 is the schematic diagram of active power of output waveform provided in an embodiment of the present invention；
Figure 11 is active-frequency control system one provided in an embodiment of the present invention without the communication soft direct join net of marine wind electric field
A exemplary composition figure；
Figure 12 is that active-frequency control system provided in an embodiment of the present invention without the communication soft direct join net of marine wind electric field is another
One exemplary composition figure；
Figure 13 is the composition figure of one specific example of computer equipment provided in an embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
The embodiment of the present invention provides a kind of active-control method for frequency without the communication soft direct join net of marine wind electric field, can answer
For marine wind electric field network system, as shown in Figure 1, marine wind electric field directly accesses to AC system on the bank, offshore power grid through soft
Access point (GCP) and point of common coupling (PCC) are same point physically, soft directly to hand on the bank through direct current access point (GAP) access
Streaming system.As shown in Fig. 2, the control method includes the following steps:
Step S1: the first frequency signal of AC network access point on the bank is obtained.In the embodiment of the present invention, as shown in figure 3,
Using phaselocked loop real-time measurement, AC network accesses dot frequency to converter station control protective module on the bank on the bank, at first-order filtering
First frequency signal is generated after reason, is only illustrated, is not limited with this.
Step S2: generation DC voltage is converted by first frequency signal.
In the embodiment of the present invention, as shown in figure 3, passing through frequency/DC voltage conversion module (f according to frequency signal on the bank
To Vdc), conversion obtains direct voltage reference value Vdc_ref.The general frequency of network system is in 49Hz to 50Hz in practical application
Between change, the span of control of DC voltage is 0.9p.u. to 1.1p.u.According to formula Δ Vdc=Δ f*KDC, calculate straight
The variable quantity of galvanic electricity pressure.Frequency to voltage conversion module transmission function as shown in figure 4, by following formula by it is described first frequency
Rate signal is converted into generation DC voltage:
Vdc_ref-VDC0=(f-f0)*KDC
Wherein, Vdc_ref indicates the DC voltage value being converted into, VDC0Indicate initial direct voltage reference value, f table
Show first frequency signal, f0Indicate initial frequency reference, KDCFor the transformation ratio of frequency to voltage.
Step S3: using DC voltage as the direct voltage reference value of converter station on the bank, the output of converter station on the bank is controlled
DC voltage value is equal to the direct voltage reference value.
In the embodiment of the present invention, as shown in figure 3, the constant DC voltage control device of change of current station control system is on the bank with Vdc_
Ref is equal to direct voltage reference value Vdc_ref as reference value, control output DC voltage value Vdc.
Step S4: at sea converter station detects DC voltage value, is translated into frequency, obtains frequency reference.
In the embodiment of the present invention, marine change of current station control system measures to obtain output DC voltage Vdc.According to DC voltage
Measured value Vdc, using DC voltage frequency translation module (Vdc to f), conversion obtains frequency reference f_ref.DC voltage
To frequency conversion module transmission function as shown in figure 5, being calculated by the following formula to obtain frequency reference:
f_ref-f0=(Vdc-VDC0)*Kf
Wherein, f_ref indicates frequency reference, f0Indicate initial frequency reference, VdcIndicate marine converter station detection
DC voltage value, VDC0Indicate initial direct voltage reference value, KfFor the transformation ratio of DC voltage to frequency.
Step S5: the frequency that marine converter station controls marine point of common coupling is equal to the frequency reference.
In the embodiment of the present invention, marine change of current station control system is using frequency reference f_ref as electric voltage frequency controller
The frequency reference of (V/f controller) controls the frequency of marine converter station point of common coupling (PCC), makes the frequency of marine PCC point
Equal to frequency reference f_ref, frequency reference value is 50Hz in the embodiment of the present invention.
Step S6: the second frequency signal of marine wind electric field acquisition offshore power grid.
In the embodiment of the present invention, as shown in figure 3, marine wind electric field control protective module is marine using phaselocked loop real-time measurement
The frequency of power grid generates second frequency signal after first-order filtering link processing.
Step S7: active frequency modulation(PFM) is carried out to offshore wind farm based on the frequency reference and second frequency signal.
In the embodiment of the present invention, the variable quantity of second frequency signal and relative frequency reference value is obtained first；Then basis
Preset ratio coefficient, first frequency signal and the converted quantity obtain active power regulation value；
Wherein, active power regulation value is calculated by the following formula:
Δ P=KfΔf
Wherein, Δ P is active power regulation value, KfFor preset ratio coefficient, Δ f is second frequency signal relative frequency ginseng
Examine the variable quantity of value.In the embodiment of the present invention, Δ f=f-f_ref, wherein frequency reference value is 50Hz.
The active adjusting of frequency built in marine wind electric field Energy Management System (Energy Management System, EMS)
Device produces active power of wind power field regulated value Δ P based on the offshore power grid frequency signal detected.I.e. in AC system frequency
When rate increases, according to amount of frequency translation Δ f, reduce active output according to a certain percentage, is lower than a fixed limit in AC system frequency
When value, increase active output according to a certain percentage, i.e. active power regulation value is Δ P=KfΔf.Marine wind electric field is according to active
Power output value variation delta P changes marine wind electric field active power of output, and then changes soft straight conveying ashore AC network
Active power, when realizing frequency variation on the coast, change the power of soft lineal system input accordingly, exchanged on the bank with supporting
The frequency of power grid is adjusted.As shown in figure 3, there are three types of the active modulating modes of frequency of marine wind electric field control protective module: frequency
Sensitive mode (FSM), finite frequency sensitive mode-high frequency (LFSM-O) and finite frequency sensitive mode-low frequency (LFSM-U).In
In practical application, maintenance work personnel can select one by Human-machine Control interface (Human Machine Interface, HMI)
Kind mode carries out detail parameters setting, the parameters such as maximum value adjusted including frequency threshold, proportionality coefficient, active power.
The embodiment of the present invention provides active-control method for frequency without the communication soft direct join net of marine wind electric field, obtains first
The first frequency signal is converted generation DC voltage by the frequency signal of AC network access point on the bank；DC voltage is made
For the direct voltage reference value of converter station on the bank, the output DC voltage value of converter station control on the bank is equal to direct voltage reference value；
Marine converter station detects DC voltage value, is translated into frequency, obtains frequency reference；Marine converter station control is marine public
The frequency of Coupling point is equal to the frequency reference；The second frequency signal of marine wind electric field acquisition offshore power grid；Based on frequency
Reference value and second frequency signal carry out active frequency modulation(PFM), it can be achieved that offshore wind farm directly enters through soft on the bank to offshore wind farm
Active-frequency control function of AC system supports AC system frequency modulation, without leading between soft straight onshore station and the station at marine station
News, without the soft directly communication between marine wind electric field, improve the reliability and the scope of application of control.
Active-control method for frequency provided in an embodiment of the present invention without the communication soft direct join net of marine wind electric field, based on straight
The frequency real power control strategy for connecing frequency control carries out modeling analysis by PSCAD/EMTDC, demonstrates the standard of the control strategy
True property and validity.The schematic diagram of requirement as shown in FIG. 6 to frequency response, such as when AC system frequency changes to 50.5Hz
When, soft straight power should reduce 2%.Wherein, Δ P: the modulation voltage of dc power, PAV: nominal DC power, Δ f: AC network
The departure of frequency, fn: rated frequency.As shown in Figure 7 is that AC system frequency waveform, flexibility as shown in Figure 8 are straight on the bank
Flow DC voltage waveform, offshore power grid frequency waveform as shown in Figure 9, active power of output waveform as shown in Figure 10.
It, can be between no station by above-mentioned simulation result it can be shown that utilizing the soft straight access system of offshore wind farm of the present invention
Under communication and the soft straight communication condition between offshore wind farm, required according to the frequency of AC system on the bank and frequency response,
Active power output is effectively adjusted, realizes the support adjusted to AC system frequency.The frequency real power control implementation method is available
In offshore wind farm through the soft engineering directly entered.
Embodiment 2
The embodiment of the present invention provides a kind of active-frequency control system without the communication soft direct join net of marine wind electric field, such as Fig. 7
It is shown, comprising:
First frequency signal acquisition module 1, for obtaining the first frequency signal of AC network access point on the bank；This module
Method described in the step S1 in embodiment 1 is executed, details are not described herein.
Frequency/DC voltage conversion module 2, for converting generation DC voltage for the first frequency signal；This mould
Block executes method described in the step S2 in embodiment 1, and details are not described herein.
The DC voltage value control module 3 of marine converter station, for using DC voltage as the direct current of converter station on the bank
Reference value is pressed, the output DC voltage value for controlling converter station on the bank is equal to the direct voltage reference value；This module executes implementation
Method described in step S3 in example 1, details are not described herein.
Frequency reference obtains module 4, detects DC voltage value for converter station at sea, is translated into frequency, obtains
To frequency reference；This module executes method described in the step S4 in embodiment 1, and details are not described herein.
Marine converter station point of common coupling frequency control module 5 controls marine point of common coupling for marine converter station
Frequency is equal to the frequency reference；This module executes method described in the step S5 in embodiment 1, and details are not described herein.
Second frequency signal acquisition module 6 obtains the second frequency signal of offshore power grid for marine wind electric field；This module
Method described in the step S6 in embodiment 1 is executed, details are not described herein.
The active frequency modulation(PFM) module 7 of offshore wind farm, for being based on the frequency reference and second frequency signal to sea
Wind-powered electricity generation carries out active frequency modulation(PFM).This module executes method described in the step S7 in embodiment 1, and details are not described herein.
As shown in figure 8, the active power and frequency control system of marine wind electric field provided in an embodiment of the present invention, further includes: control
Parameter setting module 8, for control parameter to be arranged, comprising: the maximum value of frequency threshold, proportionality coefficient and active power adjustment.
In the embodiment of the present invention, maintenance work personnel can select Active power mode by Human-machine Control interface, carry out control ginseng in detail
Number setting, including frequency threshold, proportionality coefficient, active power adjustment the parameters such as maximum value, only illustrated with this, not as
Limit.
Active-frequency control system provided in an embodiment of the present invention without the communication soft direct join net of marine wind electric field, is obtained first
The frequency signal is converted generation DC voltage by the frequency signal for taking AC network access point on the bank, and as the change of current on the bank
The direct voltage reference value stood, the output DC voltage value of converter station control on the bank are equal to direct voltage reference value；Marine converter station
DC voltage value is detected, frequency is translated into, obtains frequency reference；Marine converter station controls the frequency of marine point of common coupling
Rate is equal to the frequency reference；The second frequency signal of marine wind electric field acquisition offshore power grid；Based on frequency reference and
Two frequency signals carry out active frequency modulation(PFM) to offshore wind farm, it can be achieved that offshore wind farm directly enters AC system on opposite bank through soft
Active-frequency control function supports AC system frequency modulation, without communicating between soft straight onshore station and the station at marine station, without soft
The directly communication between marine wind electric field improves the reliability and the scope of application of control.
Embodiment 3
The embodiment of the present invention provides a kind of computer equipment, as shown in figure 13, comprising: at least one processor 401, such as
CPU (Central Processing Unit, central processing unit), at least one communication interface 403, memory 404, at least one
A communication bus 402.Wherein, communication bus 402 is for realizing the connection communication between these components.Wherein, communication interface 403
It may include display screen (Display), keyboard (Keyboard), optional communication interface 403 can also include that the wired of standard connects
Mouth, wireless interface.Memory 404 can be high speed RAM memory, and (Ramdom Access Memory, effumability are deposited at random
Access to memory), it is also possible to non-labile memory (non-volatile memory), for example, at least a disk storage
Device.Memory 404 optionally can also be that at least one is located remotely from the storage device of aforementioned processor 401.Wherein processor
401 can execute active-control method for frequency without the communication soft direct join net of marine wind electric field in embodiment 1.In memory 404
Batch processing code is stored, and processor 401 calls the program code stored in memory 404, for executing in embodiment 1
Without communication the soft direct join net of marine wind electric field active-control method for frequency.
Wherein, communication bus 402 can be Peripheral Component Interconnect standard (peripheral component
Interconnect, abbreviation PCI) bus or expanding the industrial standard structure (extended industry standard
Architecture, abbreviation EISA) bus etc..Communication bus 402 can be divided into address bus, data/address bus, control bus etc..
Only to be indicated with a line in Figure 13, it is not intended that an only bus or a type of bus convenient for indicating.
Wherein, memory 404 may include volatile memory (English: volatile memory), such as arbitrary access
Memory (English: random-access memory, abbreviation: RAM)；Memory also may include nonvolatile memory (English
Text: non-volatile memory), for example, flash memory (English: flash memory), hard disk (English: hard disk
Drive, abbreviation: HDD) or drop admittedly hard disk (English: solid-state drive, abbreviation: SSD)；Memory 404 can also wrap
Include the combination of the memory of mentioned kind.
Wherein, processor 401 can be central processing unit (English: central processing unit, abbreviation:
CPU), the combination of network processing unit (English: network processor, abbreviation: NP) or CPU and NP.
Wherein, processor 401 can further include hardware chip.Above-mentioned hardware chip can be specific integrated circuit
(English: application-specific integrated circuit, abbreviation: ASIC), programmable logic device (English:
Programmable logic device, abbreviation: PLD) or combinations thereof.Above-mentioned PLD can be Complex Programmable Logic Devices
(English: complex programmable logic device, abbreviation: CPLD), field programmable gate array (English:
Field-programmable gate array, abbreviation: FPGA), Universal Array Logic (English: generic array
Logic, abbreviation: GAL) or any combination thereof.
Optionally, memory 404 is also used to store program instruction.Processor 401 can be instructed with caller, be realized such as this
Application executes active-control method for frequency without the communication soft direct join net of marine wind electric field in embodiment 1.
The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium
Calculation machine executable instruction, the computer executable instructions can be performed in embodiment 1 without communication marine wind electric field soft direct join net
Active-control method for frequency.Wherein, the storage medium can be magnetic disk, CD, read-only memory (Read-Only
Memory, ROM), random access memory (Random Access Memory, RAM), flash memory (Flash
Memory), hard disk (Hard Disk Drive, abbreviation: HDD) or admittedly drop hard disk (Solid-State Drive, SSD) etc.；Institute
State the combination that storage medium can also include the memory of mentioned kind.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is obvious variation or
It changes still within the protection scope of the invention.
Claims (11)
1. a kind of active-control method for frequency without the communication soft direct join net of marine wind electric field, which is characterized in that including walking as follows
It is rapid:
Obtain the first frequency signal of AC network access point on the bank；
Generation DC voltage is converted by the first frequency signal；
Using DC voltage as the direct voltage reference value of converter station on the bank, the output DC voltage value etc. of converter station on the bank is controlled
In the direct voltage reference value；
At sea converter station detects DC voltage value, is translated into frequency, obtains frequency reference；
The frequency that marine converter station controls marine point of common coupling is equal to the frequency reference；
The second frequency signal of marine wind electric field acquisition offshore power grid；
Active frequency modulation(PFM) is carried out to offshore wind farm based on the frequency reference and second frequency signal.
2. active-control method for frequency according to claim 1 without the communication soft direct join net of marine wind electric field, feature exist
In described the step of obtaining the frequency signal of AC network access point on the bank, comprising:
Using phaselocked loop real-time measurement, AC network accesses dot frequency on the bank, and first frequency signal is generated after filtering processing.
3. active-control method for frequency according to claim 1 without the communication soft direct join net of marine wind electric field, feature exist
In converting generation DC voltage for the first frequency signal by following formula:
Vdc_ref-VDC0=(f-f0)*KDC
Wherein, Vdc_ref indicates the DC voltage value being converted into, VDC0Indicate initial direct voltage reference value, f indicates the
One frequency signal, f0Indicate initial frequency reference, KDCFor the transformation ratio of frequency to voltage.
4. active-control method for frequency according to claim 1 without the communication soft direct join net of marine wind electric field, feature exist
In being calculated by the following formula to obtain frequency reference:
f_ref-f0=(Vdc-VDC0)*Kf
Wherein, f_ref indicates frequency reference, f0Indicate initial frequency reference, VdcIndicate that marine converter station detects direct current
Voltage value, VDC0Indicate initial direct voltage reference value, KfFor the transformation ratio of DC voltage to frequency.
5. active-control method for frequency according to claim 1 without the communication soft direct join net of marine wind electric field, feature exist
In, it is described obtain offshore power grid second frequency signal the step of, comprising:
Using the frequency of phaselocked loop real-time measurement offshore power grid, second frequency signal is generated after filtering processing.
6. active-control method for frequency according to claim 1 without the communication soft direct join net of marine wind electric field, feature exist
In described to include: to the step of offshore wind farm progress active frequency modulation(PFM) based on the frequency reference and second frequency signal
Obtain the variable quantity of second frequency signal relative frequency reference value；
Active power regulation value is obtained according to preset ratio coefficient, first frequency signal and the converted quantity；
Marine wind electric field changes active power of output according to the active power regulation value.
7. active-control method for frequency according to claim 6 without the communication soft direct join net of marine wind electric field, feature exist
In the active power regulation value is calculated by the following formula:
Δ P=KfΔf
Wherein, Δ P is active power regulation value, KfFor preset ratio coefficient, Δ f is second frequency signal relative frequency reference value
Variable quantity.
8. a kind of active-frequency control system without the communication soft direct join net of marine wind electric field characterized by comprising
First frequency signal acquisition module, for obtaining the first frequency signal of AC network access point on the bank；
Frequency/DC voltage conversion module, for converting generation DC voltage for the first frequency signal；
The DC voltage value control module of marine converter station, for being referred to DC voltage as the DC voltage of converter station on the bank
Value, the output DC voltage value for controlling converter station on the bank are equal to the direct voltage reference value；
Frequency reference obtains module, detects DC voltage value for converter station at sea, is translated into frequency, obtains frequency
Reference value；
Marine converter station point of common coupling frequency control module controls the frequency etc. of marine point of common coupling for marine converter station
In the frequency reference；
Second frequency signal acquisition module obtains the second frequency signal of offshore power grid for marine wind electric field；
The active frequency modulation(PFM) module of offshore wind farm, for based on the frequency reference and second frequency signal to offshore wind farm into
The active frequency modulation(PFM) of row.
9. active-frequency control system according to claim 8 without the communication soft direct join net of marine wind electric field, feature exist
In, further includes:
Control parameter setup module, for control parameter to be arranged, comprising: what frequency threshold, proportionality coefficient and active power adjusted
Maximum value.
10. a kind of computer equipment characterized by comprising at least one processor, and at least one described processor
The memory of communication connection, wherein the memory is stored with the instruction that can be executed by least one described processor, the finger
It enables and any the having without the communication soft direct join net of marine wind electric field of 1-7 is required by least one described processor perform claim
Function-control method for frequency.
11. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer to refer to
It enables, the computer instruction is used to making the computer perform claim to require 1-7 any described soft without communication marine wind electric field
Active-control method for frequency of direct join net.
Priority Applications (2)
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| CN201910671033.1A CN110492524A (en) | 2019-07-24 | 2019-07-24 | Active-control method for frequency and system without the communication soft direct join net of marine wind electric field |
| PCT/CN2020/099628 WO2021012915A1 (en) | 2019-07-24 | 2020-07-01 | Active power-frequency control method and system for connection of communication-free offshore wind farm to grid via flexible direct-current system |
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| CN201910671033.1A CN110492524A (en) | 2019-07-24 | 2019-07-24 | Active-control method for frequency and system without the communication soft direct join net of marine wind electric field |
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| CN111740431A (en) * | 2020-06-11 | 2020-10-02 | 浙江运达风电股份有限公司 | Large wind power plant participating power system frequency modulation control method |
| WO2021012915A1 (en) * | 2019-07-24 | 2021-01-28 | 全球能源互联网研究院有限公司 | Active power-frequency control method and system for connection of communication-free offshore wind farm to grid via flexible direct-current system |
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| CN113193571A (en) * | 2021-04-30 | 2021-07-30 | 华中科技大学 | Non-communication control method and system for offshore wind farm to participate in frequency modulation |
| CN114374217A (en) * | 2021-12-02 | 2022-04-19 | 深圳供电局有限公司 | Control method and system for secondary feedback containing direct-current voltage and computer equipment |
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| CN112838597B (en) * | 2021-03-18 | 2023-07-25 | 国网江苏电力设计咨询有限公司 | Reactive compensation configuration method for offshore wind farm delivery system |
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| WO2021012915A1 (en) | 2021-01-28 |
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