CN107785912B - The idle work optimization method and device of wind power plant - Google Patents
The idle work optimization method and device of wind power plant Download PDFInfo
- Publication number
- CN107785912B CN107785912B CN201610795562.9A CN201610795562A CN107785912B CN 107785912 B CN107785912 B CN 107785912B CN 201610795562 A CN201610795562 A CN 201610795562A CN 107785912 B CN107785912 B CN 107785912B
- Authority
- CN
- China
- Prior art keywords
- loss
- power
- reactive
- active
- idle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention provides a kind of idle work optimization method of wind power plant and devices, this method comprises: the minimum value of idle work optimization objective function is solved, to obtain the value of the target control variables about each reactive power compensator；It include the active loss of the active power loss and reactive power compensator in wind generator system in idle work optimization objective function, the active loss of each reactive power compensator is obtained according to corresponding target control variables, and reactive power compensator includes: at least one of silent oscillation dynamic reactive compensator and silent oscillation dynamic reactive generator and current transformer；According to the value of target control variables, the idle power generating value of target of each reactive power compensator is calculated；Reactive Power Control instruction is sent to each reactive power compensator is corresponding, the corresponding idle power generating value of target is carried in Reactive Power Control instruction, so that each reactive power compensator adjusts the current idle power output size of itself according to the idle power generating value of corresponding target.Effectively realize saving energy and decreasing loss.
Description
Technical field
The present embodiments relate to the technical field of wind-power electricity generation control more particularly to a kind of idle work optimization sides of wind power plant
Method and device.
Background technique
In recent years, wind-power electricity generation melts one of hair and the new energy technology of commercialized development prospect as on the largest scale, with
A kind of unprecedented speed fast development.The continuous expansion of power grid scale, so that the importance of idle work optimization technology is increasingly
It is prominent.Idle work optimization technology refers to that structural parameters and load condition when system to timing, are meeting various typical ways safety
Under the premise of constraint, by the optimizations to certain control variables, when being optimal some or multiple performance indicators of system
Reactive-power control means, can reach improve voltage stability, improve quality of voltage and reduce network loss purpose.
The idle work optimization method of current wind power plant is with active power loss minimum or active power loss and certain class reactive compensation
The minimum idle work optimization objective function of the sum of active loss of device, but due between the parameter of various reactive power compensators, nothing
It influences each other and is associated between the reactive power of Reactive power compensation installations and active power loss, so current idle work optimization method can only reach
It is minimum to the active power loss of active power loss and certain class reactive power compensator, it cannot effectively realize saving energy and decreasing loss.
Summary of the invention
The embodiment of the present invention provides the idle work optimization method and device of a kind of wind power plant, and this method solve in the prior art
The technical issues of cannot effectively realizing saving energy and decreasing loss.
The embodiment of the present invention provides a kind of idle work optimization method of wind power plant, comprising:
The minimum value of idle work optimization objective function is solved, to obtain the target control variables about each reactive power compensator
Value；In the idle work optimization objective function include wind generator system in active power loss and reactive power compensator it is active
Loss, the active loss of each reactive power compensator are obtained according to corresponding target control variables, the reactive power compensator
It include: at least one of silent oscillation dynamic reactive compensator and silent oscillation dynamic reactive generator and current transformer；
According to the value of the target control variables, the idle power output of target of each reactive power compensator is calculated
Value；
It is instructed to the corresponding Reactive Power Control that sends of each reactive power compensator, in the Reactive Power Control instruction
The corresponding idle power generating value of target is carried, so that each reactive power compensator is adjusted according to the idle power generating value of corresponding target
The current idle power output size of itself.
The embodiment of the present invention provides a kind of idle work optimization device of wind power plant, comprising:
Function solves unit, for solving the minimum value of the idle work optimization objective function, to obtain about each idle
The value of the target control variables of compensation device；It include the active net in wind generator system in the idle work optimization objective function
The active loss of damage and reactive power compensator, the active loss of each reactive power compensator is according to corresponding target control variables
Obtain, the reactive power compensator include: in silent oscillation dynamic reactive compensator and silent oscillation dynamic reactive generator at least
A kind of and current transformer；
Idle power output determination unit solves unit with the function and is connected, for taking according to the target control variables
Value, is calculated the idle power generating value of target of each reactive power compensator；
Instruction sending unit is connected with the idle power output determination unit, is used for each reactive power compensator pair
Reactive Power Control instruction should be sent, the corresponding idle power generating value of target is carried in the Reactive Power Control instruction, so that often
A reactive power compensator adjusts the size of the current idle power output of itself according to the idle power generating value of corresponding target.
The embodiment of the present invention provides the idle work optimization method and device of a kind of wind power plant, by solving idle work optimization target letter
Several minimum value, to obtain the value of the target control variables about each reactive power compensator；In idle work optimization objective function
Active loss including active power loss and reactive power compensator in wind generator system, the active loss of each reactive power compensator
It is obtained according to corresponding target control variables, reactive power compensator includes: silent oscillation dynamic reactive compensator and silent oscillation dynamic
At least one of reacance generator and current transformer；According to the value of target control variables, each reactive compensation dress is calculated
Power generating value that the target set is idle；Reactive Power Control instruction is sent to each reactive power compensator is corresponding, Reactive Power Control refers to
The corresponding idle power generating value of target is carried in order, so that each reactive power compensator is adjusted according to the idle power generating value of corresponding target
The current idle power output size of itself.Due in wind generator system, the reactive power of active power loss and reactive power compensator
It is related and interrelated between reactive power compensator, so not comprising only function network loss in idle work optimization objective function, also
Active loss including reactive power compensator, so that reactive power compensator is that current idle power output size is adjusted to target is idle
After power generating value, saving energy and decreasing loss is effectively realized.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart of the idle work optimization method embodiment one of wind power plant of the present invention；
Fig. 2 is the flow chart of the idle work optimization method embodiment two of wind power plant of the present invention；
Fig. 3 is the structural schematic diagram of the idle work optimization Installation practice one of wind power plant of the present invention；
Fig. 4 is the structural schematic diagram of the idle work optimization Installation practice two of wind power plant of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
For the sake of clarity, illustrate the definition for the specific word or phrase that the present invention uses first.
Active power loss: the function that route, transformer are distributed in the form of heat etc. during wind power plant electrical energy transportation in reporting cycle
Rate loss.
Idle power output: the value for the reactive power that reactive power compensator generates.
Measured value: actual measured value.
Fig. 1 is the flow chart of the idle work optimization method embodiment one of wind power plant of the present invention, as shown in Figure 1, the present embodiment mentions
The executing subject of confession is the idle work optimization device of wind power plant, and the idle work optimization device of the wind power plant can be integrated in wind generator system
In, which includes at least one wind-driven generator and at least one integrated circuit and reactive power compensator, nothing
Reactive power compensation installations include: silent oscillation dynamic reactive compensator (referred to as: SVC) and silent oscillation dynamic reactive generator (referred to as: SVG)
At least one and current transformer.Then the idle work optimization method of wind power plant provided in this embodiment includes following steps.
Step 101, the minimum value of idle work optimization objective function is solved, to obtain the target about each reactive power compensator
Control the value of variable.
It wherein, include that active power loss in wind generator system and reactive power compensator have in idle work optimization objective function
Function loss, the active loss of each reactive power compensator are obtained according to corresponding target control variables.
Wherein, reactive power compensator includes: silent oscillation dynamic reactive compensator and the (letter of silent oscillation dynamic reactive generator
Claim: SVG) at least one and current transformer.
Specifically, in the present embodiment, due to including the active power loss in wind generator system in idle work optimization objective function
Active loss with the active loss of reactive power compensator, each reactive power compensator is obtained according to corresponding target control variables,
Active power loss can also be used corresponding target control variables and indicate, so solving the minimum value of idle work optimization objective function, that is, ask
Solve the value of the corresponding target control variables of each reactive power compensator.Solve the meaning of idle work optimization function specifically: in each nothing
When Reactive power compensation installations correspond to target control variables value and why are worth, the active loss of wind generator system can be made to reach minimum,
Effectively realize the purpose of saving energy and decreasing loss.
Wherein, the number of target control variables is determined according to the type and number of reactive power compensator.
Wherein, target control variables can be the reactive power of reactive power compensator, or with reactive power compensator
The relevant variable of reactive power.
Specifically, active power loss may include: the active loss of route and the active loss of transformer.The active damage of route
Consumption includes: transmission line of electricity active loss and submitting route active loss.Transformer includes: box type transformer or booster stations transformation
Device.The active loss of reactive power compensator includes: at least one and current transformer of the active loss of SVC and the active loss of SVG
Active loss.The quantity of current transformer is identical as the number of the wind-driven generator in wind generator system.Current transformer is integrated in wind
In power generator.The number of SVC and SVG can be one or more.
In the present embodiment, without limitation to specific method for solving.Such as can for integer programming method, interior point method, genetic,
Neural network etc., or be other artificial intelligence approaches.
Step 102, according to the value of target control variables, the idle power output of target of each reactive power compensator is calculated
Value.
Specifically, it in the present embodiment, according to the relationship of target control variables and target reactive power, determines corresponding idle
Power generating value that the target of compensation device is idle, power generating value that target is idle be under the value of corresponding target control variables, target without
The value of function power.
Illustrate are as follows: if reactive power compensator is current transformer, the target control variables of current transformer and corresponding target without
Function power has mapping relations, then the target reactive power under the value of target control variables is determined according to the mapping relations
Value, the value of the target reactive power are the idle power generating value of target.If reactive power compensator is SVC's or SVG, SVC or SVG
Target control variables are just that then according to the value of corresponding target control variables mesh is calculated in the corresponding useless power of target
Mark the value that idle power generating value is equal to corresponding target control variables.
Step 103, it is instructed to the corresponding Reactive Power Control that sends of each reactive power compensator, in Reactive Power Control instruction
The corresponding idle power generating value of target is carried, so that each reactive power compensator adjusts itself according to the idle power generating value of corresponding target
Current idle power output size.
It is understood that in the present embodiment, the idle work optimization device of wind power plant and the unsteady flow of each wind-driven generator
Device, SVC and/or SVG are connected, and are communicated with the current transformer of each wind-driven generator, SVC and/or SVG.
Specifically, in the present embodiment, Reactive Power Control instruction, Reactive Power Control are sent to each reactive power compensator
The corresponding idle power generating value of target is carried in instruction, then corresponding reactive power compensator by the idle power generating value of corresponding target with work as
Preceding idle power output size is compared, if current idle power output size is different from the idle power generating value of target, general is currently idle to go out
Power size is adjusted to the idle power generating value of target, to adjust reactive voltage, reaches the active loss of entire wind generator system most
It is low, it is really achieved the purpose of saving energy and decreasing loss.
The idle work optimization method of wind power plant provided in this embodiment, by solving the minimum value of idle work optimization objective function,
To obtain the value of the target control variables about each reactive power compensator；It include wind-power electricity generation in idle work optimization objective function
The active loss of active power loss and reactive power compensator in system, the active loss of each reactive power compensator is according to corresponding mesh
Mark control variable obtains, and reactive power compensator includes: in silent oscillation dynamic reactive compensator and silent oscillation dynamic reactive generator
At least one and current transformer；According to the value of target control variables, the target that each reactive power compensator is calculated is idle
Power generating value；Reactive Power Control instruction is sent to each reactive power compensator is corresponding, carries and corresponds in Reactive Power Control instruction
The idle power generating value of target so that each reactive power compensator adjusts the current nothing of itself according to the idle power generating value of corresponding target
Function power output size.Since in wind generator system, active power loss is related with the reactive power of reactive power compensator, and idle
It is interrelated between compensation device, it further include reactive compensation so not comprising only function network loss in idle work optimization objective function
The active loss of device includes that silent oscillation dynamic reactive compensator and silent oscillation dynamic reactive occur in reactive power compensator
At least one of device and current transformer.So so that each reactive power compensator is adjusted to by the size of current idle power output
After power generating value that target is idle, saving energy and decreasing loss is effectively realized.
Further, in this embodiment idle work optimization objective function includes: the active loss of current transformer, current transformer net side
Extremely collect to the high-pressure side of the active loss of cabinet step down side route, the active loss of cabinet transformer, cabinet transformer
The active loss of electric pole route, the active loss of trolley pole to booster stations low-pressure side route, silent oscillation dynamic reactive compensator
Active loss, the active loss of silent oscillation dynamic reactive generator and the active loss of booster stations transformer.
Preferably, in the present embodiment, idle work optimization objective function can be expressed as shown in formula (1):
Wherein, n is the quantity of wind-driven generator, and m is the quantity for collecting electric line.ΔPCiFor the change of i-th of wind-driven generator
Flow the active loss of device, Δ PL1iFor current transformer net side the having to its cabinet step down side route of i-th of wind-driven generator
Function loss, Δ PTiFor the active loss of the cabinet transformer of i-th of wind-driven generator, Δ PL2iFor the case of i-th of wind-driven generator
Active loss of the high-pressure side of body transformer to trolley pole route, Δ PLjFor j-th of trolley pole to booster stations low-pressure side route
Active loss, Δ PSVCFor the active loss of silent oscillation dynamic reactive compensator, Δ PSVGFor silent oscillation dynamic reactive generator
Active loss, Δ PT2For the active loss of booster stations transformer.
In formula (1), Δ PCiIt is indicated using the target control variables of corresponding current transformer, Δ PSVCUsing corresponding SVC's
Target control variables expression, Δ PSVGIt is indicated using the target control variables of corresponding SVG.ΔPCiWith the target control of current transformer
The representation of variable, Δ PSVCUsing the representation and Δ P of the target control variables of SVCSVGUsing the control argument table of SVG
Show in mode this embodiment without limitation.
In formula (1), Δ PL1i、ΔPTi、ΔPL2i、ΔPLj、ΔPT2It is represented sequentially as formula (2), formula (3), formula (4), formula
(5) and shown in formula (6):
Wherein, pL1Indicate that the current transformer net side of i-th of wind-driven generator is active to its cabinet step down side route
Power, qL1Indicate reactive power of the current transformer net side of i-th of wind-driven generator to its cabinet step down side route, UL1
Indicate voltage of the current transformer net side of i-th of wind-driven generator to its cabinet step down side route, RL1Indicate i-th of wind-force
The current transformer net side of generator to its cabinet step down side route resistance.
It should be understood that pL1、qL1And UL1It can be used the active loss of the current transformer of i-th of wind-driven generator corresponding
Target control variables and the target control variables of the corresponding target control variables of SVC and/or SVG indicate.pL1、qL1And UL1's
Value is according to the corresponding target control variables of SVC and/or the corresponding target control variables of SVG and the corresponding target control of current transformer
The measured value that the value of variable processed obtains.
Wherein, P0Indicate the no-load loss of box type transformer, PKIndicate the load loss of box type transformer, pTIt indicates i-th
The active power of the cabinet transformer of wind-driven generator, qTIndicate the reactive power of the cabinet transformer of i-th of wind-driven generator,
SNIndicate the rated capacity of the cabinet transformer of i-th of wind-driven generator, wherein P0、PK、SNValue be i-th of wind-power electricity generation
The factory-said value of the cabinet transformer of machine.
It should be understood that pTAnd qTThe corresponding target control of active loss of the current transformer of i-th of wind-driven generator can be used
The corresponding target control variables of variable and SVC processed and/or the corresponding target control variables of SVG indicate, pTAnd qTValue according to
The corresponding target control variables of SVC and/or the corresponding target control variables of SVG and the corresponding target control variables of current transformer take
It is worth the measured value obtained.
Wherein, pL2For i-th of wind-driven generator cabinet transformer high-pressure side to trolley pole route active power,
qL2For reactive power of the high-pressure side to trolley pole route of the cabinet transformer of i-th of wind-driven generator, UL2For i-th of wind-force
Voltage of the high-pressure side of the cabinet transformer of generator to trolley pole route, RL2For the cabinet transformer of i-th of wind-driven generator
High-pressure side to trolley pole route resistance.
Similarly, pL2、qL2And UL2The corresponding target control of the active loss of the current transformer of i-th of wind-driven generator can be used
The corresponding target control variables of variable and SVC processed and/or the corresponding target control variables of SVG indicate, pL2、qL2And UL2Value
To be become according to the corresponding target control variables of SVC and/or the corresponding target control of the corresponding target control variables of SVG and current transformer
The measured value that the value of amount obtains.
Wherein, pLFor j-th of trolley pole to the active loss of booster stations low-pressure side route, qLFor j-th of trolley pole to boosting
The reactive loss of low-pressure side of standing route, ULFor j-th of trolley pole to the voltage of booster stations low-pressure side route, RLFor j-th of trolley pole
To the resistance of booster stations low-pressure side route.Wherein, pL、qLAnd ULIt can be by the active loss of the current transformer of i-th of wind-driven generator
Corresponding target control variables and the corresponding target control variables of the corresponding target control variables of SVC and/or SVG indicate.
Wherein, P02Indicate the no-load loss of booster stations transformer, PK2Indicate the load loss of booster stations transformer, pT2Table
Show the active power of booster stations transformer, qT2Indicate the reactive power of booster stations transformer, SN2Indicate the volume of booster stations transformer
Constant volume.Wherein, P02、PK2、SN2For the factory-said value of the booster stations transformer.
Similarly, pT2And qT2The corresponding target control variables of active loss and the corresponding target control of SVC of current transformer can be used
Variable and/or the corresponding target control variables expression of SVG, pT2And qT2Value be according to the corresponding target control variables of SVC
And/or the measured value that the value of the corresponding target control variables of the corresponding target control variables current transformer of SVG obtains.
To sum up, in the present embodiment, idle work optimization objective function can be by the corresponding target control variables of SVC and/or SVG pairs
The corresponding target control variables of the target control variables and current transformer answered indicate.
Further, the idle work optimization method of wind power plant provided in this embodiment, idle work optimization objective function include: unsteady flow
The active loss of device, the active loss of current transformer net side to cabinet step down side route, the active loss of cabinet transformer,
Active loss of the high-pressure side of cabinet transformer to trolley pole route, the active loss of trolley pole to booster stations low-pressure side route,
The active loss of silent oscillation dynamic reactive compensator, the active loss and booster stations transformation of silent oscillation dynamic reactive generator
The active loss of device, so the minimum value of idle work optimization objective function is solved, to obtain the mesh about each reactive power compensator
The value of mark control variable；According to the value of target control variables, the target that each reactive power compensator is calculated is idle out
Force value；Reactive Power Control instruction is sent to each reactive power compensator is corresponding, is carried in Reactive Power Control instruction corresponding
Power generating value that target is idle, so that each reactive power compensator adjusts the current idle of itself according to the idle power generating value of corresponding target
Power output size.Since in wind generator system, active power loss is related with whole reactive powers of reactive power compensator, and nothing
It is interrelated between Reactive power compensation installations, it further include complete so not only including whole active power losses in idle work optimization objective function
The active loss of the reactive power compensator in portion, so that reactive power compensator is that current idle power output size is adjusted to target is idle
After power generating value, the active loss of whole system reaches minimum, and then truly realizes saving energy and decreasing loss.
Fig. 2 is the flow chart of the idle work optimization method embodiment two of wind power plant of the present invention, as shown in Fig. 2, the present embodiment mentions
The idle work optimization method of the wind power plant of confession is on the basis of the idle work optimization method embodiment one of wind power plant of the present invention, to step
The further refinement of rapid 101- step 103, then the idle work optimization method of wind power plant provided in this embodiment includes the following steps.
Step 201, the minimum value of idle work optimization objective function is solved, to obtain the target about each reactive power compensator
Control the value of variable.
It wherein, include that active power loss in wind generator system and reactive power compensator have in idle work optimization objective function
Function loss, the active loss of each reactive power compensator are obtained according to corresponding target control variables.
Further, the type of reactive power compensator includes: silent oscillation dynamic reactive compensator, silent oscillation dynamic reactive hair
Raw device and current transformer.
Further, in this embodiment the active loss of current transformer includes three bipolar-type power pipes of diode and insulation
Active loss；And/or
According to the active loss of capacitive branch in silent oscillation dynamic reactive compensator, the loss ratio of reactance arm, capacitor
The active capacity of branch and the reactive power of silent oscillation dynamic reactive compensator determine having for silent oscillation dynamic reactive compensator
Function loss, wherein the reactive power of silent oscillation dynamic reactive compensator is the target control variables of corresponding active loss.
Specifically, the scheduled core element in current transformer include diode and insulation three bipolar-type power pipes (referred to as:
IGBT)。
So the active loss of current transformer is expressed as shown in formula (7):
ΔPC=Δ PDs+ΔPIs (7)
Preferably, Δ PDsFor the active loss of the diode in the current transformer, it is represented by shown in formula (8):
In formula (8), fsFor the switching frequency of current transformer, ErecIt is diode in reference voltage VrefWith reference current Iref
Under Reverse recovery energy loss, VdcFor the voltage of current transformer DC side, ImFor the peak point current of current transformer.fs、Erec、Vref、
Iref、VdcValue be the current transformer factory-said value.
Wherein, ImIt is expressed as shown in formula (9):
Wherein, PtIt is current transformer in the active power of t moment, size is depending on wind speed size.U1For the exchange of current transformer
The effective voltage of side line.PtAnd U1Value be measured value,For the power factor of the current transformer,For the function of current transformer
Rate factor angle,For the corresponding target control variables of active loss of current transformer.
In the present embodiment, the active loss Δ P for the three bipolar-type power pipes (IGBT) that insulateIsIt is expressed as formula (10):
In formula (10), VrefAnd IrefReference voltage and reference current respectively in current transformer, VdcFor current transformer direct current
The voltage of side, ImFor the peak point current of current transformer, EonAnd EoffRespectively reference voltage VrefWith reference current IrefUnder open with
Turn off energy loss.Wherein, Vref、Iref、Vdc、Eon、EoffValue is the factory-said value of the current transformer.ImFor shown in formula (9).
So the active loss of current transformer uses corresponding target control variables in the present embodimentIt indicates.
Preferably, according to the active loss of capacitive branch in silent oscillation dynamic reactive compensator, the loss ratio of reactance arm
Example, the active capacity of capacitive branch and the reactive power of silent oscillation dynamic reactive compensator determine silent oscillation dynamic passive compensation
The active loss of device is embodied as shown in formula (11):
ΔpSVC=a+b × (Q1-QSVC)2 (11)
Wherein, a and Q1For the actual measurement parameter of capacitive branch.B is the actual measurement parameter of reactance arm.A is having for capacitive branch
Function loss, b are the loss ratio of reactance arm, Q1For the active capacity of capacitive branch, a, b and Q1Value be measured value,
QSVCIt is also the target control variables of silent oscillation dynamic reactive compensator for the reactive power of silent oscillation dynamic reactive compensator.
So the active loss of SVC uses corresponding target control variables Q in the present embodimentSVCIt indicates.
Further, in this embodiment according to the reactive power, loss ratio and fixation of silent oscillation dynamic reactive generator
Loss, determines the active loss of silent oscillation dynamic reactive generator, and the reactive power of silent oscillation dynamic reactive generator is to correspond to
The target control variables of active loss；Alternatively,
According to the inverter of the reactive power of silent oscillation dynamic reactive generator and silent oscillation dynamic reactive generator
Output voltage determines silent oscillation dynamic reactive generator than the angle of the access point voltage delay of silent oscillation dynamic reactive generator
Active loss, the reactive power of silent oscillation dynamic reactive generator is the target control variables of corresponding active loss.
Specifically, it according to the reactive power, loss ratio and fixed loss of silent oscillation dynamic reactive generator, determines static
The active loss of type dynamic reactive generator is embodied as shown in formula (12):
ΔPSVG=c × QSVG 2+k (12)
Wherein, c and k is the factory parameter of SVG.C is the loss ratio of silent oscillation dynamic reactive generator, according to SVG's
Model is different, and value is in (0.7~0.9) × 10-6Between, k is the fixed loss of silent oscillation dynamic reactive generator.C's and k takes
Value is the factory-said value of silent oscillation dynamic reactive generator SVG, QSVGFor the reactive power of silent oscillation dynamic reactive generator,
For the target control variables of corresponding active loss.
Specifically, according to the inverse of the reactive power of silent oscillation dynamic reactive generator and silent oscillation dynamic reactive generator
The output voltage of change device determines silent oscillation dynamic reactive than the angle of the access point voltage delay of silent oscillation dynamic reactive generator
The active loss of generator is embodied as shown in formula (13):
ΔPSVG=QSVGtanδ (13)
Wherein, δ is the actual measurement parameter of silent oscillation dynamic reactive generator SVG.δ is silent oscillation dynamic reactive generator SVG
Inverter access point voltage delay of the output voltage than silent oscillation dynamic reactive generator SVG angle, the value of δ is real
Measured value, QSVGIt is the target control variables of corresponding active loss for the reactive power of silent oscillation dynamic reactive generator.
So the active loss of SVG uses corresponding target control variables Q in the present embodimentSVGIt indicates.
It should be noted that in idle work optimization objective function, it is corresponding that SVC can be used in active power loss in the present embodiment
Target control variables and/or the corresponding target control variables of SVG and the corresponding control variable of current transformer indicate, so with
The variation of the corresponding target control variables of SVC and/or the corresponding control variable of the corresponding target control variables of SVG and current transformer,
Active power loss also changes correspondingly.
Wherein, the active loss of the route in active power loss and the active loss of transformer use the corresponding target control of SVC
The representation of the corresponding target control variables of variable and/or SVG processed and the corresponding control variable of current transformer belongs to the prior art,
Details are not described herein again.
Step 202, according to the value of the target control variables of each current transformer, be calculated the target of each current transformer without
Silent oscillation dynamic nothing is calculated in function power generating value, and the value of the target control variables according to silent oscillation dynamic reactive compensator
Power generating value that the target of function compensator is idle, and the value of the target control variables according to silent oscillation dynamic reactive generator, meter
Calculation obtains the idle power generating value of target of silent oscillation dynamic reactive generator.
Further, in the present embodiment, it is calculated each for current transformer according to the value of target control variables
Power generating value that the target of reactive power compensator is idle, specifically includes:
First according to the power-factor angle of current transformer, the active loss of current transformer is calculated.
Specifically, by the value of the power-factor angle of current transformer, be brought into formula (9), obtain peak point current value, so
After be brought into formula (8), in formula (10), calculate the value of the active loss of diode and the active loss of IGBT, be finally brought into
In formula (7), the value of the active loss of current transformer is calculated.
Then, according to the power-factor angle of the active loss of current transformer and current transformer, the target for calculating current transformer is idle out
Force value.
Specifically, in the present embodiment, according to active loss and the current transformer of the target reactive power of current transformer and current transformer
Power-factor angle relationship, calculate the idle power generating value of target of current transformer.
Wherein, the idle power generating value of the target of current transformer is expressed as shown in formula (11):
Wherein, QCIndicate the idle power generating value of target of current transformer, Δ PCIt is expressed as the active loss of current transformer,For unsteady flow
The power-factor angle of device.
For SVC and/or SVG, since the target control variables of SVC are target reactive power, so, the target of SVC without
Function power generating value is just the value of target control variables.Similarly, since the target control variables of SVG are target reactive power, so,
Power generating value that the target of SVG is idle is just the value of target control variables.
Step 203, it is instructed to the corresponding Reactive Power Control that sends of each reactive power compensator, in Reactive Power Control instruction
The corresponding idle power generating value of target is carried, so that each reactive power compensator adjusts itself according to the idle power generating value of corresponding target
Current idle power output size.
Further, in this embodiment on the basis of the idle work optimization method embodiment one of wind power plant of the present invention, in step
Before rapid 203, reactive power adjustable strategies have been stored in advance, so, itself is being adjusted according to the idle power generating value of corresponding target
Current idle power output size when, it then follows reactive power adjustable strategies.Reactive power adjustable strategies are not limited in the present embodiment
It is fixed.
The idle work optimization method of wind power plant provided in this embodiment, the active loss of current transformer include diode and insulation three
The active loss of bipolar-type power pipe；And/or according to the active damage of capacitive branch in silent oscillation dynamic reactive compensator
Consumption, the loss ratio of reactance arm, the active capacity of capacitive branch and the reactive power of silent oscillation dynamic reactive compensator are true
Determine the active loss of silent oscillation dynamic reactive compensator, wherein the reactive power of silent oscillation dynamic reactive compensator is to be corresponding with
The target control variables of function loss.According to the reactive power, loss ratio and fixed loss of silent oscillation dynamic reactive generator, really
Determine the active loss of silent oscillation dynamic reactive generator, the reactive power of silent oscillation dynamic reactive generator is corresponding active loss
Target control variables；Alternatively, being occurred according to the reactive power of silent oscillation dynamic reactive generator and silent oscillation dynamic reactive
The output voltage of the inverter of device determines that silent oscillation is dynamic than the angle of the access point voltage delay of silent oscillation dynamic reactive generator
The active loss of state reacance generator, the reactive power of silent oscillation dynamic reactive generator are the target control of corresponding active loss
Variable.The complexity calculated can be reduced when solving idle work optimization objective function.And include in idle work optimization objective function
The active loss of whole reactive power compensators in wind generator system, so that whole reactive power compensators are inciting somebody to action current idle power output
After size is adjusted to the idle power generating value of target, the active loss of whole system reaches minimum, and then truly realizes section
It can decreasing loss.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can store in a read/write memory medium.The program is being held
When row, execution includes the steps that above-mentioned each method embodiment；And storage medium above-mentioned includes: ROM, RAM, magnetic or disk
Etc. the various media that can store program code.
Fig. 3 is the structural schematic diagram of the idle work optimization Installation practice one of wind power plant of the present invention, as shown in figure 3, this implementation
The idle work optimization device for the wind power plant that example provides includes: that function solves unit 31, idle power output determination unit 32 and instruction transmission
Unit 33.
Wherein, function solves unit 31, for solving the minimum value of idle work optimization objective function, to obtain about each nothing
The value of the target control variables of Reactive power compensation installations；It include the active power loss in wind generator system in idle work optimization objective function
Active loss with the active loss of reactive power compensator, each reactive power compensator is obtained according to corresponding target control variables,
Reactive power compensator includes: at least one of silent oscillation dynamic reactive compensator and silent oscillation dynamic reactive generator and unsteady flow
Device.Idle power output determination unit 32, and function solve unit 31 and are connected, for the value according to target control variables, calculate
To the idle power generating value of target of each reactive power compensator.Instruction sending unit 33 is connected with idle power output determination unit 32, uses
In sending Reactive Power Control instruction to each reactive power compensator is corresponding, corresponding target is carried in Reactive Power Control instruction
Idle power generating value, so that each reactive power compensator adjusts the current idle power output of itself according to the idle power generating value of corresponding target
Size.
The idle work optimization device of wind power plant provided in this embodiment can execute the technical side of embodiment of the method shown in Fig. 1
Case, it is similar that the realization principle and technical effect are similar, and details are not described herein again.
Fig. 4 is the structural schematic diagram of the idle work optimization Installation practice two of wind power plant of the present invention, as shown in figure 4, this implementation
On the basis of example 1, further, idle power output determination unit 32 specifically includes: active loss computing module 321 example
With the idle power generating value computing module 322 of target.
Further, idle work optimization objective function includes: the active loss of current transformer, current transformer net side to cabinet transformer
The active loss of low-pressure side route, the active loss of cabinet transformer, high-pressure side the having to trolley pole route of cabinet transformer
Function loss, the active loss of trolley pole to booster stations low-pressure side route, the active loss of silent oscillation dynamic reactive compensator are static
The active loss of type dynamic reactive generator and the active loss of booster stations transformer.
Further, active loss computing module 321 calculates current transformer for the power-factor angle according to current transformer
Active loss；The power-factor angle of current transformer is the corresponding target control variables of active loss of current transformer.Power output that target is idle
It is worth computing module 322, is connected with active loss computing module 321, for according to the active loss of current transformer and the function of current transformer
Rate factor angle calculates the idle power generating value of target of current transformer.
The idle work optimization device of wind power plant provided in this embodiment can execute the technical side of embodiment of the method shown in Fig. 2
Case, it is similar that the realization principle and technical effect are similar, and details are not described herein again.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of idle work optimization method of wind power plant characterized by comprising
The minimum value of idle work optimization objective function is solved, to obtain taking for the target control variables about each reactive power compensator
Value；It include the active damage of the active power loss and reactive power compensator in wind generator system in the idle work optimization objective function
Consumption, the active loss of each reactive power compensator are obtained according to corresponding target control variables, the reactive power compensator packet
It includes: at least one of silent oscillation dynamic reactive compensator and silent oscillation dynamic reactive generator and current transformer；
According to the value of the target control variables, the idle power generating value of target of each reactive power compensator is calculated；
Reactive Power Control instruction is sent to each reactive power compensator is corresponding, is carried in the Reactive Power Control instruction
The corresponding idle power generating value of target, so that each reactive power compensator adjusts itself according to the idle power generating value of corresponding target
Current idle power output size；
Wherein, the idle work optimization objective function includes: the active loss of current transformer, current transformer net side to cabinet transformer low voltage
The active loss on side line road, the active loss of cabinet transformer, the active damage of the high-pressure side of cabinet transformer to trolley pole route
Consumption, the active loss of trolley pole to booster stations low-pressure side route, the active loss of silent oscillation dynamic reactive compensator, silent oscillation are dynamic
The active loss of state reacance generator and the active loss of booster stations transformer.
2. the method according to claim 1, wherein the idle work optimization objective function is embodied as:
Wherein, Δ PCiFor the active loss of the current transformer of i-th of wind-driven generator, Δ PL1iFor the unsteady flow of i-th of wind-driven generator
Active loss of the device net side to its cabinet step down side route, Δ PTiFor the cabinet transformer of i-th wind-driven generator
Active loss, Δ PL2iFor active loss of the high-pressure side to trolley pole route of the cabinet transformer of i-th of wind-driven generator, Δ
PLjFor j-th of trolley pole to the active loss of booster stations low-pressure side route, Δ PSVCFor the active of silent oscillation dynamic reactive compensator
Loss, Δ PSVGFor the active loss of silent oscillation dynamic reactive generator, Δ PT2For the active loss of booster stations transformer, n is wind
The quantity of wind-driven generator in electric field, m are the quantity for collecting electric line.
3. method described in any one of -2 according to claim 1, which is characterized in that the active loss of the current transformer includes two
The active loss of pole pipe and insulated gate bipolar translator power tube；
The method, further includes: according to the active loss of capacitive branch in the silent oscillation dynamic reactive compensator, reactance arm
Loss ratio, the reactive power of the active capacity of capacitive branch and the silent oscillation dynamic reactive compensator determines described quiet
The only active loss of type dynamic reactive compensator, wherein the reactive power of the silent oscillation dynamic reactive compensator is to be corresponding with
The target control variables of function loss.
4. according to the method described in claim 3, it is characterized in that,
The active loss of the diode indicates are as follows:
The active loss of the insulated gate bipolar translator power tube indicates are as follows:
ImIt indicates are as follows:
Wherein, fsFor the switching frequency of the current transformer, ErecIt is the diode in reference voltage VrefWith reference current IrefUnder
Reverse recovery energy loss, VdcFor the voltage of the DC side of the current transformer, ImFor the peak point current of the current transformer, EonWith
EoffRespectively reference voltage VrefWith reference current IrefUnder open with shutdown energy loss, PtIt is the current transformer in t moment
Active power, U1For the current transformer exchange side line effective voltage,It is described for the power-factor angle of the current transformerFor the corresponding target control variables of active loss of current transformer.
5. according to the method described in claim 3, it is characterized in that, according to the idle function of the silent oscillation dynamic reactive generator
Rate, loss ratio and fixed loss determine the active loss of the silent oscillation dynamic reactive generator, the silent oscillation dynamic nothing
The reactive power of function generator is the target control variables of corresponding active loss；Alternatively,
According to the inversion of the reactive power of the silent oscillation dynamic reactive generator and the silent oscillation dynamic reactive generator
The output voltage of device determines that the silent oscillation is dynamic than the angle of the access point voltage delay of the silent oscillation dynamic reactive generator
The active loss of state reacance generator, the reactive power of the silent oscillation dynamic reactive generator are the target of corresponding active loss
Control variable.
6. according to the method described in claim 4, it is characterized in that, be directed to the current transformer, it is described according to the target control
The value of variable is calculated the idle power generating value of target of each reactive power compensator, specifically includes:
According to the power-factor angle of the current transformer, the active loss of the current transformer is calculated；
According to the power-factor angle of the active loss of the current transformer and the current transformer, the target for calculating the current transformer is idle
Power generating value；Wherein, the idle power generating value of the target of the current transformer indicates are as follows:
Wherein, Δ PCFor the active loss of current transformer.
7. a kind of idle work optimization device of wind power plant characterized by comprising
Function solves unit, for solving the minimum value of the idle work optimization objective function, to obtain about each reactive compensation
The value of the target control variables of device；In the idle work optimization objective function include wind generator system in active power loss and
The active loss of the active loss of reactive power compensator, each reactive power compensator is obtained according to corresponding target control variables
It arrives, the reactive power compensator includes: at least one in silent oscillation dynamic reactive compensator and silent oscillation dynamic reactive generator
Kind and current transformer；
Idle power output determination unit solves unit with the function and is connected, for the value according to the target control variables, meter
Calculation obtains the idle power generating value of target of each reactive power compensator；
Instruction sending unit is connected with the idle power output determination unit, for sending out to each reactive power compensator is corresponding
It send Reactive Power Control to instruct, the corresponding idle power generating value of target is carried in the Reactive Power Control instruction, so that each institute
State the size that reactive power compensator adjusts the current idle power output of itself according to the idle power generating value of corresponding target；
Wherein, the idle work optimization objective function includes: the active loss of current transformer, current transformer net side to cabinet transformer low voltage
The active loss on side line road, the active loss of cabinet transformer, the active damage of the high-pressure side of cabinet transformer to trolley pole route
Consumption, the active loss of trolley pole to booster stations low-pressure side route, the active loss of silent oscillation dynamic reactive compensator, silent oscillation are dynamic
The active loss of state reacance generator and the active loss of booster stations transformer.
8. device according to claim 7, which is characterized in that the idle power output determination unit specifically includes:
Active loss computing module calculates the active loss of the current transformer for the power-factor angle according to the current transformer；
The power-factor angle of the current transformer is the corresponding target control variables of active loss of current transformer；
Target is idle power generating value computing module, is connected, for having according to the current transformer with the active loss computing module
The power-factor angle of function loss and the current transformer, calculates the idle power generating value of target of the current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795562.9A CN107785912B (en) | 2016-08-31 | 2016-08-31 | The idle work optimization method and device of wind power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795562.9A CN107785912B (en) | 2016-08-31 | 2016-08-31 | The idle work optimization method and device of wind power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107785912A CN107785912A (en) | 2018-03-09 |
| CN107785912B true CN107785912B (en) | 2019-11-05 |
Family
ID=61451475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610795562.9A Active CN107785912B (en) | 2016-08-31 | 2016-08-31 | The idle work optimization method and device of wind power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107785912B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713606B (en) * | 2020-12-22 | 2022-04-01 | 华中科技大学 | Method and system for determining optimal topology of LCC-MMC hybrid direct-current power transmission system in given scene |
| CN113991862B (en) * | 2021-11-02 | 2024-05-28 | 国网北京市电力公司 | Power equipment cluster control method, device and reactive compensation system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4771225A (en) * | 1986-03-26 | 1988-09-13 | Kabushiki Kaisha Toshiba | Device for limiting switching frequency of a parallel capacitor reactive power compensation network |
| CN101034810A (en) * | 2007-04-27 | 2007-09-12 | 清华大学 | Economic adjusting and control method for top layer of the static mixed automatic voltage control |
| CN105656055A (en) * | 2016-01-25 | 2016-06-08 | 东北大学 | Wind power plant clustered reactive power and voltage optimized control system and control method thereof |
-
2016
- 2016-08-31 CN CN201610795562.9A patent/CN107785912B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4771225A (en) * | 1986-03-26 | 1988-09-13 | Kabushiki Kaisha Toshiba | Device for limiting switching frequency of a parallel capacitor reactive power compensation network |
| CN101034810A (en) * | 2007-04-27 | 2007-09-12 | 清华大学 | Economic adjusting and control method for top layer of the static mixed automatic voltage control |
| CN105656055A (en) * | 2016-01-25 | 2016-06-08 | 东北大学 | Wind power plant clustered reactive power and voltage optimized control system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107785912A (en) | 2018-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ge et al. | Energy storage system-based power control for grid-connected wind power farm | |
| CN104092250B (en) | The distributed economic load dispatching of micro-grid system and control method for coordinating | |
| CN103560546B (en) | Method for improving droop control in energy storage charge state | |
| Lahaçani et al. | Static compensator for maintaining voltage stability of wind farm integration to a distribution network | |
| CN102377189B (en) | Optimal configuration and operation method for reactive compensation of wind farm | |
| CN102856899B (en) | Method of reducing network loss of micro power grid | |
| CN101950974A (en) | Electric energy quality regulating system based on energy storing of super capacitor | |
| CN105243516A (en) | Distributed photovoltaic power generation maximum consumption capability calculation system based on active power distribution network | |
| CN106786625A (en) | Distribution network voltage control method for coordinating based on distributing-supplying-energy system interaction capability | |
| CN104584357A (en) | Power distribution system loss reduction with distributed energy resource control | |
| CN109274136A (en) | A kind of photovoltaic system idle work optimization method based on quanta particle swarm optimization | |
| CN106786485A (en) | For the mains ripple suppressing method of direct-current grid under unbalanced load | |
| CN105680479A (en) | Virtual synchronous generator control method and system by considering dynamic characteristics of photovoltaic power supply | |
| CN109787239A (en) | Tide model exchanges the alternating iteration tidal current computing method and system of combined hybrid system with multi-frequency | |
| CN110206686A (en) | A kind of adaptive maximum power tracking and controlling method for wind power generating set | |
| CN109787297A (en) | A kind of extra-high voltage direct-current sending end reactive power optimization method considering transient characterisitics | |
| CN105470978B (en) | A kind of static passive compensation device control method for coordinating in groups | |
| CN104836260B (en) | Calculation method for allowed capacity of DGs in active power distribution network under voltage constraint | |
| CN107785912B (en) | The idle work optimization method and device of wind power plant | |
| CN104333008B (en) | A kind of reactive voltage control method improving wind energy turbine set rate of qualified voltage | |
| CN102904266A (en) | Method for determining inactive compensation capacity network adaptability of wind power plant | |
| CN104124705B (en) | Wind-powered electricity generation transient response scheme optimization method based on wind-electricity integration system stability characteristic | |
| CN103501010B (en) | The wind energy turbine set reactive power support method of a kind of pair of Hysteresis control | |
| CN103513693B (en) | Control method based on single argument current method photovoltaic maximum power tracking control system | |
| CN109546687B (en) | New energy grid connection method adopting droop control technology improved based on virtual power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |