CN110224438A - The soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault - Google Patents
The soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault Download PDFInfo
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- CN110224438A CN110224438A CN201910610680.1A CN201910610680A CN110224438A CN 110224438 A CN110224438 A CN 110224438A CN 201910610680 A CN201910610680 A CN 201910610680A CN 110224438 A CN110224438 A CN 110224438A
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- 238000012544 monitoring process Methods 0.000 claims description 6
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- 125000002619 bicyclic group Chemical group 0.000 description 1
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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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- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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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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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The invention discloses a kind of soft straight transmitting system traversing control methods of marine wind electric field under electric network fault to calculate the active power profit margin P of marine wind electric field when DC voltage increases and is greater than or equal to maximum permissible valueol；Work as Pol> PtpmWhen, the double-fed fan motor unit of all metasynchronism operations starts energy consumption control, and energy consumption control coefrficient is set as the maximum energy consumption control coefrficient of the double-fed fan motor unit of marine wind electric field Central Asia synchronous operation, while cutting off the double-fed fan motor unit of supersynchronous operation；Work as Pol≤PtpmWhen, the double-fed fan motor unit of all metasynchronism operations starts energy consumption control, and then implements control.This method can give full play to the flexible power control ability of double-fed fan motor unit, fast implement the active power balance of the soft straight transmitting system of marine wind electric field, it avoids soft straight locking and wind power plant caused by electric network fault to stop transport, has many advantages, such as control efficiency height, goes out that system shock is small, wide adaptation range to double-fed fan motor unit and soft direct sending.
Description
Technical field
The present invention relates to protecting electrical power systems and control field, and in particular, to marine wind electric field under a kind of electric network fault
Soft straight transmitting system traversing control method.
Background technique
To solve global energy crisis, wind-power electricity generation is quickly grown in the world.It is more complete relative to developing
For the wind-powered electricity generation of land, offshore wind farm has broader development prospect.Offshore wind farm is grid-connected relative to friendship through soft straight transmission system
For stream transmission of electricity grid-connected and customary DC transmission of electricity grid-connected mode, can isolate wind power plant with exchange major network, have black start-up ability,
Reduce reactive power compensator, suitable for the transmission of remote wind power, the soft straight transmitting system of marine wind electric field is had become at present
The grid-connected major way of offshore wind farm.
At sea in the soft straight transmitting system of wind power plant, when receiving end power grid occur short trouble when, soft straight transmitting system by
The active power of grid side converter station output is held to reduce, and the active power that double-fed fan motor unit issues is controlled by it system and determines
It is fixed, it is held essentially constant in failure process, resulting imbalance active power makes the direct current of soft straight transmitting system
Pressure increases, and DC voltage is out-of-limit, and then may cause soft straight transmitting system locking.It is larger due to marine wind electric field, if
Marine wind electric field is cut off from electric system, biggish active impact further may be caused to system, destroy electric system
Stable operation.Under receiving end electric network fault, how to ensure the safety of marine wind electric field and soft straight transmission system, how to avoid sea
Upper wind power plant and soft straight transmission system off-grid, to pass through, the electric network fault stage has become marine wind electric field exploitation and operation faces
Critical issue.
Currently, it is the direct current mother in soft straight transmitting system that the soft direct sending of marine wind electric field, which goes out the main method that the system failure is passed through,
The additional energy resistance of letting out of line installation avoids DC voltage out-of-limit, but the heat dissipation problem for letting out energy resistance is serious, and there are biggish safety
Hidden danger is often unable to satisfy the fault traversing requirement of the soft straight transmitting system of marine wind electric field, and can be shown using additional energy resistance of letting out
It writes and increases cost of investment.
Using the fault-signal of the wind farm side converter station of soft straight transmitting system, controlling double-fed fan motor unit reduces wattful power
Rate, to reduce the uneven active power of source net, be increasingly becoming that the soft direct sending of marine wind electric field goes out that the system failure passes through has
Effect selection.Current main method includes 2 classes: raising frequency method and voltage drop method.Wherein, raising frequency method is using frequency as carrier, by direct current mistake
Pressure information is transmitted to wind power plant, reduces the active power issued by the virtual inertia control of wind power plant.But raising frequency method is main
From the determining frequency adjustment of angle of soft straight transmitting system active power balance, do not consider frequency variation to double-fed fan motor
The influence of unit.Since the variation of double-fed fan motor unit set end voltage frequency passes through generator unit stator reaction and Variable flow control shadow
The electromagnetic transient for ringing rotor windings may cause rotor current increase, threaten the safety of double-fed fan motor unit current transformer.Drop
Platen press directly reduces the exchange side voltage of the wind farm side converter station of soft straight transmitting system, achievees the purpose that reduce active power.
But since double-fed fan motor unit is more sensitive to set end voltage, the low-voltage that voltage drop method may trigger double-fed fan motor unit is worn
More control.More importantly raising frequency method and voltage drop method are only capable of so that double-fed fan motor unit is in the smaller model for operating normally power
Interior variation is enclosed, this variation range is generally much less than unbalanced power amount caused by receiving end electric network fault, therefore raising frequency method and drop
The scope of application of platen press is relatively limited, can not thoroughly solve the problems, such as the fault traversing of the soft straight transmitting system of marine wind electric field.
In conclusion continuing to increase with marine wind electric field installed capacity, due to the soft straight transmitting system of marine wind electric field
Fault ride-through method shortcoming, easily there is electric network fault and cause soft straight transmitting system locking, in turn result in a large amount of Wind turbines
Off-grid will cause biggish active impact to power grid, threaten the safe and stable operation of whole system, how make full use of double-fed wind
The flexible power control capabilities of motor group more effectively realize the fault traversing of the soft straight transmitting system of marine wind electric field have become in order to
Those skilled in the art's urgent problem.
Summary of the invention
In view of the above shortcomings of the prior art, go out the present invention provides the soft direct sending of marine wind electric field under a kind of electric network fault and be
System traversing control method, it is contemplated that the receiving end grid side converter station controlling party of the soft straight transmitting system of marine wind electric field when electric network fault
The switching of formula, it is contemplated that influence of the source net active power balance for DC voltage is avoided and soft caused by electric network fault directly closed
Lock and wind power plant are stopped transport.The control method can formulate double-fed fan motor unit control according to fault severity level and cut machine scheme,
The flexible power control ability for giving full play to double-fed fan motor unit realizes that marine wind electric field is soft straight after power grid DC voltage increases
The fault traversing of transmitting system has many advantages, such as that control nargin is big, realizes that simple, economy is high.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:
The soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault, includes the following steps:
The DC voltage of the soft straight transmitting system of S1, real-time detection marine wind electric field；
S2, when DC voltage increase and be greater than or equal to maximum permissible value when, obtain DC voltage increase before and increase after
The soft straight transmitting system of marine wind electric field receiving end grid side converter station output power, based on DC voltage increase before and direct current
The output power of the receiving end grid side converter station of the soft straight transmitting system of marine wind electric field after voltage raising calculates marine wind electric field
Active power profit margin Pol；
S3, work as Pol> PtpmWhen, the double-fed fan motor unit of all metasynchronism operations starts energy consumption control, energy consumption control system
Number is set as the maximum energy consumption control coefrficient of the double-fed fan motor unit of marine wind electric field Central Asia synchronous operation, while cutting off supersynchronous fortune
Capable double-fed fan motor unit, the unit capacity of excision are Pol-Ptpm, PtpmIndicate what marine wind electric field can reduce using energy consumption control
Maximum active power, the double-fed fan motor unit of metasynchronism operation and the double-fed fan motor unit of supersynchronous operation are based on double-fed fan motor machine
The revolving speed of group determines；
S4, work as Pol≤PtpmWhen, the double-fed fan motor unit of all metasynchronism operations starts energy consumption control, energy consumption control system
The ratio-dependent of base consumable maximum power when the double-fed fan motor unit that every metasynchronism is run is using energy consumption control.
Preferably, consumable when obtaining the output power of the double-fed fan motor unit of metasynchronism operation and being controlled using energy consumption
Maximum power, the output power of the double-fed fan motor unit based on metasynchronism operation and use energy consumption consumable maximum work when controlling
Rate calculates the maximum active-power P that marine wind electric field can reduce using energy consumption controltpm, the safety based on double-fed fan motor unit is about
Beam condition determines the maximum energy consumption control coefrficient of the double-fed fan motor unit of marine wind electric field Central Asia synchronous operation.
Preferably, the maximum active-power P that marine wind electric field can be reduced using energy consumption controltpmIt is calculated based on following formula:
In formula, m is the quantity of the double-fed fan motor unit of all metasynchronism operations of marine wind electric field,WithRespectively
Consumable maximum power when the output power of the double-fed fan motor unit of jth platform metasynchronism operation and use energy consumption control；
The output power of the double-fed fan motor unit of jth platform metasynchronism operationIt is obtained by on-line monitoring system, using consumption
Consumable maximum power when can controlIt is calculate by the following formula:
In formula, LmAnd LsThe respectively magnetizing inductance and stator inductance of double-fed fan motor unit；For the operation of jth platform metasynchronism
Double-fed fan motor unit set end voltage；ωsFor the synchronous angular velocity of double-fed fan motor unit；For the operation of jth platform metasynchronism
The maximum energy consumption control coefrficient of double-fed fan motor unit.
Preferably, the active power profit margin P of marine wind electric fieldolIt is calculated based on following formula:
Pol=Pgs0-Pgsf
In formula, Pgs0The receiving end grid side converter station of the soft straight transmitting system of marine wind electric field is defeated before increasing for DC voltage
Power out；PgsfThe output power of the receiving end grid side converter station of soft straight transmitting system after being increased for DC voltage；
In formula, UgsfThe alternating voltage amplitude of receiving end grid side converter station after increasing for DC voltage passes through on-line monitoring system
System obtains；IgsmFor the current limit of the flow control of rationing the power supply of receiving end grid side converter station.
Preferably, work as Pol≤PtpmWhen, the energy consumption of the double-fed fan motor unit of jth platform metasynchronism operation are as follows:
The energy consumption control coefrficient of the double-fed fan motor unit of jth platform metasynchronism operation are as follows:
In conclusion the technical program, which provides the soft straight transmitting system of marine wind electric field under a kind of electric network fault, passes through control
Method, the active power profit margin of marine wind electric field, passes through the active of double-fed fan motor unit after being increased according to power grid DC voltage
The unbalanced power of the soft straight transmitting system of marine wind electric field is realized in energy consumption, to stabilize the DC voltage wave of soft straight transmitting system
It is dynamic, avoid soft straight locking and wind power plant caused by electric network fault from stopping transport.Unlike the prior art, this method realizes offshore wind farm
The switching of field generator operation state and motor-operated running state, gives full play to the flexible power control ability of double-fed fan motor unit, real
The fault traversing of the existing soft straight transmitting system of marine wind electric field, have adjustable range greatly, be easily achieved, be applied widely etc. it is excellent
Point.
Detailed description of the invention
In order to keep the purposes, technical schemes and advantages of invention clearer, the present invention is made into one below in conjunction with attached drawing
The detailed description of step, in which:
Fig. 1 is the stream of the soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault disclosed by the invention
Cheng Tu；
Fig. 2 is that the soft direct sending of marine wind electric field disclosed by the invention goes out system schematic；
Fig. 3 is double-fed fan motor unit energy consumption control block diagram.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, the invention discloses a kind of soft straight transmitting systems of marine wind electric field under electric network fault to pass through controlling party
Method includes the following steps:
The DC voltage of the soft straight transmitting system of S1, real-time detection marine wind electric field；
S2, when DC voltage increase and be greater than or equal to maximum permissible value when, obtain DC voltage increase before and increase after
The soft straight transmitting system of marine wind electric field receiving end grid side converter station output power, based on DC voltage increase before and direct current
The output power of the receiving end grid side converter station of the soft straight transmitting system of marine wind electric field after voltage raising calculates marine wind electric field
Active power profit margin Pol；
S3, work as Pol> PtpmWhen, the double-fed fan motor unit of all metasynchronism operations starts energy consumption control, energy consumption control system
Number is set as the maximum energy consumption control coefrficient of the double-fed fan motor unit of marine wind electric field Central Asia synchronous operation, while cutting off supersynchronous fortune
Capable double-fed fan motor unit, the unit capacity of excision are Pol-Ptpm, PtpmIndicate what marine wind electric field can reduce using energy consumption control
Maximum active power, the double-fed fan motor unit of metasynchronism operation and the double-fed fan motor unit of supersynchronous operation are based on double-fed fan motor machine
The revolving speed of group determines；
S4, work as Pol≤PtpmWhen, the double-fed fan motor unit of all metasynchronism operations starts energy consumption control, energy consumption control system
The ratio-dependent of base consumable maximum power when the double-fed fan motor unit that every metasynchronism is run is using energy consumption control.
In the present invention, maximum permissible value can be configured according to the actual conditions of wind power plant, when DC voltage increases
And when being greater than or equal to maximum permissible value, then it is believed that breaking down.Determine double-fed fan motor unit for metasynchronism fortune based on revolution
The double-fed fan motor unit of capable double-fed fan motor unit or supersynchronous operation is the prior art, and details are not described herein.
In the present invention, core is the maximum for using energy consumption to control with it according to the active power profit margin of marine wind electric field
The relationship of active power reduction, determine metasynchronism operation double-fed fan motor unit energy consumption control coefrficient and supersynchronous operation
Double-fed fan motor unit cut machine amount, off-grid is not run guarantee double-fed fan motor unit as far as possible, utilizes the fast of double-fed fan motor unit
Fast power control capabilities realize power self-balancing, realize the fault traversing of soft straight transmitting system.This method considers electric network fault
When soft straight transmitting system receiving end grid side converter station control mode switching, it is contemplated that source net active power balance is for direct current
The influence of voltage avoids soft straight locking and wind power plant caused by electric network fault and stops transport.Unlike the prior art, this method is realized
The switching of marine wind electric field generator operation state and motor-operated running state, gives full play to the flexible power control of double-fed fan motor unit
Ability processed realizes the fault traversing of the soft straight transmitting system of marine wind electric field, have adjustable range greatly, be easily achieved, be applicable in
The advantages that range is wide.
When it is implemented, obtaining the output power of the double-fed fan motor unit of metasynchronism operation and can disappear when being controlled using energy consumption
The maximum power of consumption, based on metasynchronism operation double-fed fan motor unit output power and using energy consumption control when it is consumable most
The maximum active-power P that high-power calculating marine wind electric field can be reduced using energy consumption controltpm, the peace based on double-fed fan motor unit
Staff cultivation condition determines the maximum energy consumption control coefrficient of the double-fed fan motor unit of marine wind electric field Central Asia synchronous operation.
When it is implemented, the maximum active-power P that marine wind electric field can be reduced using energy consumption controltpmIt is calculated based on following formula:
In formula, m is the quantity of the double-fed fan motor unit of all metasynchronism operations of marine wind electric field,WithRespectively
Consumable maximum power when the output power of the double-fed fan motor unit of jth platform metasynchronism operation and use energy consumption control；
The output power of the double-fed fan motor unit of jth platform metasynchronism operationIt is obtained by on-line monitoring system, using consumption
Consumable maximum power when can controlIt is calculate by the following formula:
In formula, LmAnd LsThe respectively magnetizing inductance and stator inductance of double-fed fan motor unit；For the operation of jth platform metasynchronism
Double-fed fan motor unit set end voltage；ωsFor the synchronous angular velocity of double-fed fan motor unit；For the operation of jth platform metasynchronism
The maximum energy consumption control coefrficient of double-fed fan motor unit.
When it is implemented, the active power profit margin P of marine wind electric fieldolIt is calculated based on following formula:
Pol=Pgs0-Pgsf
In formula, Pgs0The receiving end grid side converter station of the soft straight transmitting system of marine wind electric field is defeated before increasing for DC voltage
Power out；PgsfThe output power of the receiving end grid side converter station of soft straight transmitting system after being increased for DC voltage, it is contemplated that soft straight
The receiving end grid side converter station of transmitting system takes the control mode of grid voltage orientation, with unity power factor when normal operation
Operation, is switched to flow control of rationing the power supply from constant DC voltage control in failure, therefore:
In formula, UgsfThe alternating voltage amplitude of receiving end grid side converter station after increasing for DC voltage passes through on-line monitoring system
System obtains；IgsmFor the current limit of the flow control of rationing the power supply of receiving end grid side converter station.
When it is implemented, working as Pol≤PtpmWhen, the energy consumption of the double-fed fan motor unit of jth platform metasynchronism operation are as follows:
The energy consumption control coefrficient of the double-fed fan motor unit of jth platform metasynchronism operation are as follows:
The present invention is the soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault, being capable of basis
Fault severity level formulates double-fed fan motor unit control and cuts machine scheme, it is contemplated that the receiving end of soft straight transmitting system when electric network fault
The switching of grid side converter station control mode, it is contemplated that influence of the source net active power balance for DC voltage passes through the party
Method can give full play to the flexible power control ability of double-fed fan motor unit, fast implement the soft straight transmitting system of marine wind electric field
Active power balance avoids soft straight locking and wind power plant caused by electric network fault and stops transport.Below with attached sea turn shown in Fig. 2
Application of the invention is introduced for the soft straight transmitting system of electric field.
In Fig. 2, it is followed successively by marine wind electric field, soft straight transmitting system and receiving end power grid from left to right.PwfGo out for soft direct sending and is
The active power that the marine wind electric field side converter station of system absorbs, PgsFor soft straight transmitting system receiving end grid side converter station issue
Active power, UdcFor the DC voltage of soft straight transmitting system.When the attached soft straight transmitting system of marine wind electric field shown in Fig. 2 is in receiving end
When electric network fault, the uneven active power at soft straight transmitting system both ends will lead to DC voltage raising, in order to guarantee soft direct sending
The stable operation of the safety of system and electric system out can be used method of the invention and be controlled.
The energy consumption control block diagram of double-fed fan motor unit is as shown in Fig. 3, and rotor-side converter is latched outer ring controller, directly
D, q axis component reference value of given inner loop control device rotor currentWithRespectively 0, since inner loop control device is generally according to allusion quotation
The design of I type system of type, may be implemented the response speed of Millisecond, irdAnd irqRespectively d, q axis component of rotor current.Work as Asia
After the energy consumption control coefrficient of the double-fed fan motor unit of synchronous operation determines, the rotor-side unsteady flow of each double-fed fan motor unit is inputted
Device can start energy consumption operation.ωsAnd ωpRespectively synchronous angular velocity and slip angular velocity, RrFor rotor resistance, σ is leakage field
Coefficient, LrFor inductor rotor,WithRespectively d, q axis component reference value of rotor voltage.Grid-side converter uses bicyclic control
Device design processed is stablized for controlling DC voltage and set end voltage.UgAnd UdcThe respectively amplitude of set end voltage and DC voltage,WithThe respectively amplitude reference value of set end voltage and DC voltage,WithRespectively d, q of grid-side converter electric current
Axis component reference value, igdAnd igqRespectively d, q axis component of grid-side converter electric current,WithRespectively set end voltage
D, q axis component reference value.
When going out system jam for the soft direct sending of marine wind electric field, current control method is transported by double-fed fan motor unit
The limitation of row condition, adjustable range is limited, possibly can not stabilize the variation that soft direct sending goes out system dc voltage completely.This method is filled
Divide the switching for considering the receiving end grid side converter station control mode of soft straight transmitting system when electric network fault, it is contemplated that source net is active
Influence of the power-balance for DC voltage, the active power profit margin of marine wind electric field after being increased according to power grid DC voltage,
Using corresponding double-fed fan motor unit power control means, the calculation method and double-fed fan motor unit for proposing control reference value change
Into control structure, the flexible power control ability of double-fed fan motor unit can be given full play to by this method, fast implements sea
The active power balance of the upper soft straight transmitting system of wind power plant avoids soft straight locking and wind power plant caused by electric network fault and stops transport,
Have many advantages, such as that control efficiency is high, the small, wide adaptation range that goes out system shock to double-fed fan motor unit and soft direct sending.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although passing through ginseng
According to the preferred embodiment of the present invention, invention has been described, it should be appreciated by those of ordinary skill in the art that can
To make various changes to it in the form and details, without departing from the present invention defined by the appended claims
Spirit and scope.
Claims (5)
1. the soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault, which is characterized in that including walking as follows
It is rapid:
The DC voltage of the soft straight transmitting system of S1, real-time detection marine wind electric field；
S2, the sea when DC voltage increases and is greater than or equal to maximum permissible value, before acquisition DC voltage increases and after increasing
The output power of the receiving end grid side converter station of the upper soft straight transmitting system of wind power plant increases preceding and DC voltage based on DC voltage
The output power of the receiving end grid side converter station of the soft straight transmitting system of marine wind electric field after raising calculates having for marine wind electric field
Function power surplus amount Pol；
S3, work as Pol> PtpmWhen, the double-fed fan motor unit of all metasynchronism operations starts energy consumption control, and energy consumption control coefrficient is set
For the maximum energy consumption control coefrficient of the double-fed fan motor unit of marine wind electric field Central Asia synchronous operation, while cutting off supersynchronous operation
Double-fed fan motor unit, the unit capacity of excision are Pol-Ptpm, PtpmIndicate the maximum that marine wind electric field can reduce using energy consumption control
Active power, the double-fed fan motor unit of metasynchronism operation and the double-fed fan motor unit of supersynchronous operation are based on double-fed fan motor unit
Revolving speed determines；
S4, work as Pol≤PtpmWhen, the double-fed fan motor unit of all metasynchronism operations starts energy consumption control, and consume energy control coefrficient base
The ratio-dependent of consumable maximum power when the double-fed fan motor unit of every metasynchronism operation is using energy consumption control.
2. the soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault as described in claim 1, special
Sign is, obtains the output power of the double-fed fan motor unit of metasynchronism operation and uses consumable maximum work when consuming energy control
Rate, the output power of the double-fed fan motor unit based on metasynchronism operation and is calculated using consumable maximum power when energy consumption control
The maximum active-power P that marine wind electric field can be reduced using energy consumption controltpm, the security constraints based on double-fed fan motor unit
Determine the maximum energy consumption control coefrficient of the double-fed fan motor unit of marine wind electric field Central Asia synchronous operation.
3. the soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault as claimed in claim 2, special
Sign is that marine wind electric field controls the maximum active-power P that can reduce using energy consumptiontpmIt is calculated based on following formula:
In formula, m is the quantity of the double-fed fan motor unit of all metasynchronism operations of marine wind electric field,WithRespectively jth platform
Consumable maximum power when the output power of the double-fed fan motor unit of metasynchronism operation and use energy consumption control；
The output power of the double-fed fan motor unit of jth platform metasynchronism operationIt is obtained by on-line monitoring system, is controlled using energy consumption
Consumable maximum power when processedIt is calculate by the following formula:
In formula, LmAnd LsThe respectively magnetizing inductance and stator inductance of double-fed fan motor unit；For the double of jth platform metasynchronism operation
Present the set end voltage of Wind turbines；ωsFor the synchronous angular velocity of double-fed fan motor unit；For the double-fed of jth platform metasynchronism operation
The maximum energy consumption control coefrficient of Wind turbines.
4. the soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault as described in claim 1, special
Sign is, the active power profit margin P of marine wind electric fieldolIt is calculated based on following formula:
Pol=Pgs0-Pgsf
In formula, Pgs0The output work of the receiving end grid side converter station of the soft straight transmitting system of marine wind electric field before being increased for DC voltage
Rate；PgsfThe output power of the receiving end grid side converter station of soft straight transmitting system after being increased for DC voltage；
In formula, UgsfThe alternating voltage amplitude of receiving end grid side converter station, is obtained by on-line monitoring system after increasing for DC voltage
It arrives；IgsmFor the current limit of the flow control of rationing the power supply of receiving end grid side converter station.
5. the soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault as claimed in claim 3, special
Sign is, works as Pol≤PtpmWhen, the energy consumption of the double-fed fan motor unit of jth platform metasynchronism operation are as follows:
The energy consumption control coefrficient of the double-fed fan motor unit of jth platform metasynchronism operation are as follows:
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