CN106505618B - The unit of wind power integration power grid controls decreasing loss method - Google Patents
The unit of wind power integration power grid controls decreasing loss method Download PDFInfo
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Abstract
The invention discloses the units of wind power integration power grid to control decreasing loss method, using wastage reducing and energy saving as target, coordinated control is carried out to control unit, to reduce network loss, on the basis of existing normal power supplies, high energy load, the grid-connected position of wind park and capacity data, corresponding units division is carried out to each wind park, normal power supplies and high energy load, the power coordination of normal power supplies and high energy load between unit in unit is reasonably carried out according to wind power output situation, minimizes network loss as far as possible.
Description
Technical field
The present invention relates to renewable energy utilizations and dispatching technique field, and in particular, to the unit of wind power integration power grid
Control decreasing loss method.
Background technique
Extensive new energy rapidly develops in recent years, and energy shortage problem has been effectively relieved, but large-scale wind power is simultaneously simultaneously
Net brings new challenge to economy operation of power grid so that access grid loss surge.Consider that large-scale wind power is nearby usually built
Have high energy enterprise, and the process characteristic of high energy industry determines that it is smaller to the dependence of power quality, have it is good can
Adjust, can break feature, can effectively respond and stabilize large-scale wind power fluctuation the influence caused by network loss.Accordingly, it is considered to
High energy load is included in adjustable range, He Yuan is carried out and combines decreasing loss.
Summary of the invention
It is an object of the present invention in view of the above-mentioned problems, propose wind power integration power grid unit control decreasing loss method so that
Network loss is reduced to minimum, and provide reference for the renewable energy management and running of power grid.
To achieve the above object, the technical solution adopted by the present invention is that: the unit of wind power integration power grid controls decreasing loss method,
It specifically includes that
Step 1: according to geographical diagram, control unit being carried out to wind park, normal power supplies and high energy load and is drawn
Point；
Step 2: according to each control unit wind park predicted value Pwi+jQwi, sending end normal power supplies planned value PGi0+jQGi0, it is high
Carry can load put into operation capacity PLi0+jQLi0, receiving end normal power supplies planned value PGi1+jQGi1With carry can load put into operation capacity PLi1+
jQGi1, determine the adjustable extent and adjusting sequence of normal power supplies and high energy load；
Step 3: using loss minimization as target, coordinated control being carried out to each control unit, obtains the list of wind power integration power grid
Member control decreasing loss method.
Further, control unit described in step 1 includes two nodes, defines the side that wind power stream is control unit
To control unit division specifically includes, and flowing out node according to control unit direction definition wind power is control unit sending end, separately
One node is control unit receiving end,
Described control unit sending end includes wind park Pwi+jQwi, normal power supplies PGi0+jQGi0With high energy load PLi0+
jQLi0；
Described control unit receiving end includes normal power supplies PGi1+jQGi1With high energy load PLi1+jQGi1；If being terminated with wind
The wind park is then incorporated to next stage control unit sending end by power plant.
Further, the determination of adjustable extent specifically includes,
The constraint of normal power supplies unit output bound:
PG_mmin≤PG_m≤PG_mmax (1)
In formula: PG_mFor m platform unit output；PG_mminFor m platform unit output lower limit；PG_mmaxGo out for m platform unit
The power upper limit；
The constraint of high energy load adjustment:
Switching period constraint to kth kind high energy load are as follows: the duration of up-regulation is not less thanIt is no more thanMathematical notation is as follows:
In formula:It is discrete variable for the adjustment state amount of high energy load k, 0 or 1 can only be taken.It takes in 0 representative not
It adjusts, 1 representative is taken to raise；
Adjust count constraint
In formula: MkFor maximum allowable switching frequency of the high energy load k within dispatching cycle.
Further, the determination of adjusting sequence includes,
Since controlled plant increases transmission distance in controlled plant confrontation unit between unit, so it is single to carry out control first
It is adjusted in first；The determination of adjusting sequence specifically includes in control unit:
Sending end source lotus regulated quantity P0=| PG0|+|PL0|, ignore the idle influence to network loss of wind-powered electricity generation, network loss after sending end is adjusted
Are as follows:
In formula: P01+jQ01For line transmission power；U750For 750 high voltage side of transformer voltages；Rl01To transmit line resistance.
Receiving end source lotus regulated quantity P1=| PG1|+|PL1|, network loss after receiving end is adjusted are as follows:
Sending end receiving end regulated quantity is identical, i.e. P0=P1When, it is made the difference to obtain receiving end adjusting and sending end by formula (6) and formula (5)
Adjust decreasing loss difference:
By formula (7) it is found that PwWhen ≠ 0, Δ P > 0, sending end regulating effect more preferably, therefore is preferentially adjusted in control unit and is sent
End,
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in sending endi01,Di02,…,Di0N) N
The normal power supplies adjusted, high energy load sum are participated in for control unit i sending end, with vector (Pi01,Pi02,…,Pi0N)TIt indicates
Matching convention power supply, high energy Load Regulation power, then sending end decreasing loss value are as follows:
Δ PLoss_0=(Di01,Di02, …,Di0N) ×(Pi01,Pi02..., Pi0N)T (8)
Secondly control unit receiving end is adjusted according to adjusting method identical with control unit sending end:
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in receiving endi11,Di12,…,Di1M) M
The normal power supplies adjusted, high energy load sum are participated in for control unit i receiving end, it is conventional to adjust receiving end according to power loss sensitivity descending
Power supply, high energy load；With vector (Pi11,Pi12,…,Pi1M)TIndicate matching convention power supply, high energy Load Regulation power, then
Receiving end decreasing loss value are as follows:
ΔPLoss_1=(Di11,Di12, … ,Di1M) × (Pi11,Pi12, … ,Pi1M)T (9)
Further, it is specifically included in step 3: according to each control unit wind park predicted value Pwi+jQwi, wind-powered electricity generation monthly average
Power output ratio η determines that wind park is in additional issue state or subtracts hair-like state；
If wind park is in additional issue state, specific regulating step includes:
Step 31: if wind park is in additional issue state, calculating the network loss spirit of sending end normal power supplies, high energy Load Regulation amount
Sensitivity successively decreases according to sensitivity and sequentially reduces sending end normal power supplies power output PGi0+jQGi0, increase high energy load capacity PLi0+
jQLi0, the sum of sending end regulated quantity absolute value is equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0| when, it adjusts and stops；
Step 32: if wind park is in additional issue state, sending end regulating power is used up, and the sum of sending end regulated quantity absolute value is still small
In wind-powered electricity generation additional issue amount, then the power loss sensitivity of receiving end normal power supplies, high energy Load Regulation amount is calculated, successively decreased sequentially according to sensitivity
Reduce receiving end normal power supplies power output PGi1+jQGi1, increase high energy load capacity PLi1+jQLi1, regulated quantity is absolute in control unit
The sum of value is equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0|+|ΔPGi1|+|ΔPLi1| when, it adjusts and stops；
Step 33: if wind-powered electricity generation is issued additional, receiving end regulating power used up, be not able to satisfy still in control unit regulated quantity absolute value it
It with equal to wind-powered electricity generation additional issue amount, then adjusts and closes on control unit sending end, increase due to closing on controlled plant in control unit confrontation unit
Big transmission distance, adjusting efficiency reduces, so setting lower sensitivity limit, in control unit, to close on control unit regulated quantity exhausted
Stop when being equal to wind-powered electricity generation additional issue amount or institute's adjusted position sensitivity lower than limit value to the sum of value；Regulated quantity is absolute in described control unit
It is worth and closes on the sum of control unit regulated quantity absolute value i.e. equal to wind-powered electricity generation additional issue amount:
The n be closed on control unit i and sending end sensitivity be greater than limit value control unit number；
If wind park, which is in, subtracts hair-like state, network loss is higher than monthly average network loss, repeats step 31- step 33；Network loss is lower than the moon
Average loss does not apply decreasing loss regulation measure on the basis of meeting electric system active balance, because when wind-powered electricity generation subtracts hair electricity consumption at
This increase, it is appropriate to cut off high energy load.
The unit of the wind power integration power grid of various embodiments of the present invention controls decreasing loss method, has comprehensively considered normal power supplies and height
The interaction coordination ability of energy two aspects of load is carried, first by carrying out dividing elements to actual electric network, then with loss minimization
For target, adjustable extent, adjusting sequence are determined, then carried out in control unit, coordinated control between control unit, determine wind power integration
The unit of power grid controls decreasing loss method, network loss is reduced to minimum, provides reference for power grid formulation renewable energy operation plan.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is that the unit of wind power integration power grid described in the embodiment of the present invention controls decreasing loss method schematic；
Fig. 2 is that the unit of wind power integration power grid described in the embodiment of the present invention controls the simplified electricity of decreasing loss method wind power integration
Pessimistic concurrency control, that is, control unit model；
Fig. 3 is that the unit of wind power integration power grid described in the embodiment of the present invention controls decreasing loss method containing extensive renewable energy
The Hexi Corridor electric network wiring scheme of source and high energy load；
Fig. 4 is that the unit of wind power integration power grid described in the embodiment of the present invention controls decreasing loss method Yumen-Jiuquan region electricity
Network Geographical position wiring diagram；
Fig. 5 controls sweet under decreasing loss method different adjustment mode for the unit of wind power integration power grid described in the embodiment of the present invention
Respectful network loss compares change curve with wind power output.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Specifically, on the basis of existing normal power supplies, high energy load, the grid-connected position of wind park and capacity data,
Corresponding units division is carried out to each wind park, normal power supplies and high energy load, is reasonably carried out according to wind power output situation single
The power coordination of first interior normal power supplies and high energy load between unit, minimizes network loss as far as possible.Specific implementation step
Such as attached drawing 1.The unit control decreasing loss method of wind power integration power grid is to carry out coordination control to control unit using wastage reducing and energy saving as target
System, to reduce network loss.The effect of this decreasing loss method is illustrated below with reference to the simplified electrical network model of wind power integration.
S1: according to geographical diagram, control unit division is carried out to wind park, normal power supplies and high energy load.
The S1 the following steps are included:
S101: control unit includes two nodes, and defining wind power flow direction is control unit direction；
S102: flowing out node according to control unit direction definition wind power is control unit sending end, and another node is control
Unit receiving end processed.Control unit sending end includes wind park Pwi+jQwi, normal power supplies PGi0+jQGi0With high energy load PLi0+
jQLi0；Control unit receiving end includes normal power supplies PGi1+jQGi1With high energy load PLi1+jQGi1.Pay attention to such as being terminated with wind-powered electricity generation
The wind park should be then incorporated to next stage control unit sending end by factory；
S2: according to each control unit wind park predicted value Pwi+jQwi, sending end normal power supplies planned value PGi0+jQGi0, high load
Can load put into operation capacity PLi0+jQLi0, receiving end normal power supplies planned value PGi1+jQGi1, high energy load puts into operation capacity PLi1+jQGi1,
Determine the adjustable extent and adjusting sequence of normal power supplies and high energy load.
1) adjustable extent
1. normal power supplies unit output bound constrains
PG_mmin≤PG_m≤PG_mmax (1)
In formula: PG_mFor m platform unit output；PG_mminFor m platform unit output lower limit；PG_mmaxGo out for m platform unit
The power upper limit.
2. high energy load adjustment constrains
Switching period constraint to kth kind high energy load are as follows: the duration of up-regulation is not less thanIt is no more thanMathematical notation is as follows:
In formula:It is discrete variable for the adjustment state amount of high energy load k, 0 or 1 can only be taken.It takes in 0 representative not
It adjusts, 1 representative is taken to raise.
Adjust count constraint
In formula: MkFor maximum allowable switching frequency of the high energy load k within dispatching cycle.
2) adjusting sequence
Since controlled plant increases transmission distance in controlled plant confrontation unit between unit, so unit should be carried out first
Interior adjusting；Adjusting sequence can be derived from by following in control unit:
Sending end source lotus regulated quantity P0=| PG0|+|PL0|, ignore the idle influence to network loss of wind-powered electricity generation, network loss after sending end is adjusted
Are as follows:
In formula: P01+jQ01For line transmission power；U750For 750 high voltage side of transformer voltages；Rl01To transmit line resistance.
Receiving end source lotus regulated quantity P1=| PG1|+|PL1|, network loss after receiving end is adjusted are as follows:
Sending end receiving end regulated quantity is identical, i.e. P0=P1When, receiving end adjusting can be obtained by formula (6)-(5) and sending end adjusting decreasing loss is poor
Value:
By formula (7) it is found that PwWhen ≠ 0, Δ P > 0, sending end regulating effect more preferably, therefore is preferentially adjusted in control unit and is sent
End.
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in sending endi01,Di02,…,Di0N) (N is control
Unit i sending end processed participates in the normal power supplies adjusted, high energy load sum), with vector (Pi01,Pi02,…,Pi0N)TIt indicates to correspond to
Normal power supplies, high energy Load Regulation power, then sending end decreasing loss value are as follows:
ΔPLoss_0=(Di01,Di02, … ,Di0N) × (Pi01,Pi02..., Pi0N)T (8)
Control unit receiving end adjusting method is identical as control unit sending end:
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in receiving endi11,Di12,…,Di1M) M
The normal power supplies adjusted, high energy load sum are participated in for control unit i receiving end, it is conventional to adjust receiving end according to power loss sensitivity descending
Power supply, high energy load；With vector (Pi11,Pi12,…,Pi1M)TIndicate matching convention power supply, high energy Load Regulation power, then
Receiving end decreasing loss value are as follows:
ΔPLoss_1=(Di11,Di12, … ,Di1M) × (Pi11,Pi12,… ,Pi1M)T (9)
S3: using loss minimization as target, coordinated control is carried out to each control unit, obtains the unit control of wind power integration power grid
Decreasing loss method processed.
The S3 the following steps are included:
S301: according to each control unit wind park predicted value Pwi+jQwi, wind-powered electricity generation monthly average contribute ratio η, determine wind park
In issuing additional or subtract hair-like state；
S302: if wind-powered electricity generation is issued additional, the power loss sensitivity of sending end normal power supplies, high energy Load Regulation amount is calculated, according to sensitive
Degree, which successively decreases, sequentially reduces sending end normal power supplies power output PGi0+jQGi0, increase high energy load capacity PLi0+jQLi0, sending end regulated quantity
The sum of absolute value is equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0| when, it adjusts and stops；
S303: if wind-powered electricity generation is issued additional, sending end regulating power is used up, and the sum of regulated quantity absolute value is still less than wind-powered electricity generation additional issue amount, then
The power loss sensitivity for calculating receiving end normal power supplies, high energy Load Regulation amount successively decreases according to sensitivity and sequentially reduces the conventional electricity of receiving end
Contribute P in sourceGi1+jQGi1, increase high energy load capacity PLi1+jQLi1, the sum of regulated quantity absolute value is equal to wind-powered electricity generation in control unit
Additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0|+|ΔPGi1|+|ΔPLi1| when, it adjusts and stops；
S304: if wind-powered electricity generation is issued additional, receiving end regulating power is used up, and is not able to satisfy the sum of regulated quantity absolute value in control unit still
It equal to wind-powered electricity generation additional issue amount, then adjusts and closes on control unit sending end, increase due to closing on controlled plant in control unit confrontation unit
Transmission distance, adjusting efficiency reduces, so lower sensitivity limit should be arranged, in control unit, to close on control unit regulated quantity exhausted
Wind-powered electricity generation additional issue amount is equal to the sum of value,
I.e.(n be and control unit i
Close on and sending end sensitivity be greater than the control unit number of limit value) or institute's adjusted position sensitivity lower than limit value when stop；
S305: if wind-powered electricity generation subtracts hair, network loss is higher than monthly average network loss, repeats S302-S304；Network loss is lower than monthly average network loss,
On the basis of meeting electric system active balance, it should mainly consider to meet high energy business electrical demand at this time.Because wind-powered electricity generation subtracts
Electric cost increases when hair, can cut off high energy load in right amount.
It is the Hexi Corridor electric network wiring scheme containing extensive renewable energy and high energy load, with Gansu in Fig. 3
It is analyzed for 2014 Nian Dong great typical operation modes, the decreasing loss method of wind power integration power grid provided by the invention includes:
S1: according to geographical diagram, control unit division is carried out to wind park, normal power supplies and high energy load.
S101: Yumen-Jiuquan regional power grid geographical diagram such as Fig. 4.Selecting it is typical control unit, including jade
Door, two, Jiuquan node, defining wind power flow direction is control unit direction；
S102: select Yumen area for possessing large-scale wind power and a small amount of normal power supplies as sending end；Possess thermoelectricity, wind
Yumen-Jiuquan typical case's control unit is established as receiving end in the Jiuquan region of electric and large quantities of high energy industries.Pay attention to by Jiuquan
Area's wind park is incorporated to next stage control unit sending end.
S2: according to control unit wind park predicted value Pwi+jQwi, sending end normal power supplies planned value PGi0+jQGi0, high energy
Load puts into operation capacity PLi0+jQLi0, sending end normal power supplies planned value PGi1+jQGi1, high energy load puts into operation capacity PLi1+jQGi1,
It determines the adjustable extent of normal power supplies and high energy load and adjusts target.The prosperous Xidan seat grid-connected 100MW of wind park of sending end, installation
Capacity 201MW；The thermal power plant's off-grid operation of 5, Yumen, total installation of generating capacity 110MW；Yumen regional load is 60MW；Jiuquan region fire
Power plant is numerous, by taking the thermoelectricity of Jiuquan as an example, 2 installed capacity 330MW units, and adjustable extent 0-330MW；Jiuquan thermoelectricity load is
58.24MW。
S3: using loss minimization as target, coordinated control is carried out to sending end receiving end in each control unit, obtains wind power integration
The loss minimization method of operation.
S301: according to control unit wind park predicted value, wind-powered electricity generation monthly average contribute ratio, determine wind park be in additional issue or
Subtract hair-like state.Sending end accesses 100MW wind-powered electricity generation (Gansu network loss value is 347.377MW), subtracts because raw data packets are in wind-powered electricity generation additional issue
Critical state is sent out, so being now in additional issue state；
S302: normal power supplies 100MW, increase high energy 0MW are reduced in sending end respectively；It reduces normal power supplies 0MW, increase height
Energy 100MW is carried, the sum of sending end regulated quantity absolute value is made to be equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0|；
S303: normal power supplies 100MW, increase high energy 0MW are reduced in receiving end respectively；It reduces normal power supplies 0MW, increase height
Energy 100MW is carried, the sum of receiving end regulated quantity absolute value is made to be equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi1|+|ΔPLi1|；
Statistics network loss situation of change is as follows:
Send receiving end decreasing loss contrast table
Decreasing loss effect is as shown in figure 5, from simulation result: sending end decreasing loss is adjusted in Yumen-Jiuquan typical case's control unit
Effect is much better than receiving end.Successively decrease sequentially according to sensitivity, control sequence is Yumen thermoelectricity → Yumen load → Jiuquan heat in this element
Electricity → Jiu Gang aluminium manufacturer.
Copy Yumen-Jiuquan control unit division methods, to west of a river power grid carry out dividing elements, be divided into " Dunhuang-Yumen ",
" Yumen-Jiuquan ", " Jiuquan-west of a river ", " west of a river-Wusheng " 4 control units, as shown in Figure 2.Subtract the period of hair, net in wind-powered electricity generation
Damage is generally below monthly average network loss and does not apply decreasing loss regulation measure on the basis of meeting power-balance.In wind-powered electricity generation additional issue
Section, under different wind power output percentages, west of a river power grid is adjusted by following three kinds of regulative modes respectively:
1. adjusting normal power supplies, make Δ PG=Δ Pw；
2. adjusting high energy load, make Δ Pl=Δ Pw；
3. regulation unit makes Δ Pi=Δ Pw。
By simulation result it is found that under wind power integration, adjusting normal power supplies, high energy load and control unit respectively can have
Effect reduces network loss.When the big hair of wind-powered electricity generation, decreasing loss advantage is highlighted in a manner of control unit.
Examples detailed above analysis shows: the unit of wind power integration power grid controls decreasing loss method, comprehensively considered normal power supplies and
The interaction coordination ability of two aspects of high energy load, first by carrying out dividing elements to actual electric network, then most with network loss
Small is target, determines adjustable extent, adjusting sequence, then carry out in control unit, coordinated control between control unit, finally determines wind
It is electrically accessed the unit control decreasing loss method of power grid, network loss is can be effectively reduced, formulates renewable energy operation plan for power grid and mention
For reference.
On the basis of existing normal power supplies, high energy load, the grid-connected position of wind park and capacity data, to each wind-powered electricity generation
Factory, normal power supplies and high energy load carry out corresponding units division, are reasonably carried out according to wind power output situation in unit and single
The power coordination of normal power supplies and high energy load, minimizes network loss as far as possible between member.Specific implementation step such as attached drawing 1.
The present invention is used to provide reference for dispatching of power netwoks department reasonable arrangement renewable energy operation plan.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (2)
1. the unit of wind power integration power grid controls decreasing loss method, which comprises the following steps:
Step 1: according to geographical diagram, control unit division being carried out to wind park, normal power supplies and high energy load；
Step 2: according to each control unit wind park predicted value Pwi_fore+jQwi_fore, sending end normal power supplies planned value PGi0+jQGi0、
Sending end high energy load puts into operation capacity PLi0+jQLi0, receiving end normal power supplies planned value PGi1+jQGi1It puts into operation with receiving end high energy load
Capacity PLi1+jQLi1, determine the adjustable extent and adjusting sequence of normal power supplies and high energy load；
Step 3: using loss minimization as target, coordinated control being carried out to each control unit, obtains the unit control of wind power integration power grid
Decreasing loss method processed；
Control unit described in step 1 includes two nodes, defines the direction that wind power flow direction is control unit, control unit
Division specifically includes, and according to control unit direction definition, it is control unit sending end that wind power, which flows out node, and another node is control
Unit receiving end processed,
Described control unit sending end includes wind park, normal power supplies and high energy load；
Described control unit receiving end includes normal power supplies and high energy load；If being terminated with wind park, simultaneously by the wind park
Enter next stage control unit sending end；
In step 2, the determination of adjustable extent is specifically included,
The constraint of normal power supplies unit output bound:
PG_mmin≤PG_m≤PG_mmax (1)
In formula: PG_mFor m platform unit output；PG_mminFor m platform unit output lower limit；PG_mmaxFor on m platform unit output
Limit；
The constraint of high energy load adjustment:
Switching period constraint to kth kind high energy load are as follows:
In formula:For the high energy load k t period adjustment state amount,For high energy load k the i-th period adjusting shape
State amount,It is discrete variable, 0 or 1 can only be taken, 0 representative is taken not raise, 1 representative is taken to raise,Respectively
For the minimum and maximum up-regulation duration it is corresponding when number of segment；
Adjust count constraint
In formula: MkFor maximum allowable switching frequency of the high energy load k within dispatching cycle；
The determination of adjusting sequence includes,
Since controlled plant increases transmission distance in controlled plant relation control unit between control unit, so being controlled first
It is adjusted in unit processed；The determination of adjusting sequence specifically includes in control unit:
Sending end source lotus regulated quantity Δ Pi0=| Δ PLi0|+|ΔPGi0|, ignore the idle influence to network loss of wind-powered electricity generation, net after sending end is adjusted
Damage are as follows:
In formula: Δ PGi0、ΔPLi0Respectively sending end normal power supplies, the active regulated quantity of high energy load are greater than 0 and increase for active power
Add, reduces less than 0 for active power；Uli0For route sending end voltage；Rli01To transmit line resistance；
Receiving end source lotus regulated quantity Δ Pi1=| Δ PLi1|+|ΔPGi1|, network loss after receiving end is adjusted are as follows:
In formula: Δ PGi1、ΔPLi1Respectively receiving end normal power supplies, the active regulated quantity of high energy load are greater than 0 and increase for active power
Add, reduces less than 0 for active power；Uli1For route receiving end voltage；
Sending end receiving end regulated quantity is identical, i.e. Δ Pi0=Δ Pi1When, it is made the difference to obtain receiving end adjusting and be sent with formula (5) by formula (6)
End adjusts network loss difference, ignores line electricity pressure drop here, enables Uli0=Uli1, have,
By formula (7) it is found that PwiWhen ≠ 0, Δ P > 0, sending end regulating effect more preferably, therefore preferentially adjusts sending end in control unit；
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in sending endi01,Di02,…,Di0N), (Di01,
Di02,…,Di0N) it is row vector, the N is that control unit i sending end participates in the normal power supplies adjusted, high energy load sum, with
Column vector (Pi01,Pi02,…,Pi0N)TIndicate corresponding sending end normal power supplies, high energy Load Regulation power, then sending end decreasing loss value
Are as follows:
ΔPLoss_0=(Di01,Di02,…,Di0N)×(Pi01,Pi02..., Pi0N)T (8)
Secondly control unit receiving end is adjusted according to adjusting method identical with control unit sending end:
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in receiving endi11,Di12,…,Di1M), (Di11,
Di12,…,Di1M) it is row vector, the M is that control unit i receiving end participates in the normal power supplies adjusted, high energy load sum, according to
Power loss sensitivity descending adjusts receiving end normal power supplies, high energy load；With column vector (Pi11, Pi12..., Pi1M)TIndicate it is corresponding by
Normal power supplies, high energy Load Regulation power are held, receiving end drop is obtained multiplied by regulation power column vector with power loss sensitivity row vector
Damage value, it may be assumed that
ΔPLoss_1=(Di11,Di12,…,Di1M)×(Pi11,Pi12,…,Pi1M)T (9)。
2. the unit of wind power integration power grid according to claim 1 controls decreasing loss method, which is characterized in that have in step 3
Body includes: according to each control unit wind park predicted value Pwi_fore+jQwi_fore, wind-powered electricity generation monthly average contribute ratio η, determine wind park
In additional issue state or subtract hair-like state；
If wind park is in additional issue state, specific regulating step includes:
Step 31: if wind park is in additional issue state, Δ PwiFor wind-powered electricity generation additional issue amount, sending end normal power supplies, high energy load are calculated
The power loss sensitivity of regulated quantity successively decreases according to sensitivity and sequentially reduces sending end normal power supplies planned value PGi0+jQGi0, increase high energy
Load puts into operation capacity PLi0+jQLi0, to guarantee that active balance, the sum of sending end regulated quantity absolute value are equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi
=| Δ PLi0|+|ΔPGi0| when, it adjusts and stops；
Step 32: if wind park is in additional issue state, sending end regulating power is used up, and the sum of sending end regulated quantity absolute value is still less than wind
Electric additional issue amount then calculates the power loss sensitivity of receiving end normal power supplies, high energy Load Regulation amount, successively decreases according to sensitivity and sequentially reduces
Receiving end normal power supplies planned value PGi1+jQGi1, increase high energy load and put into operation capacity PLi1+jQLi1, to guarantee active balance, control
The sum of regulated quantity absolute value is equal to wind-powered electricity generation additional issue amount, i.e. Δ P in unitwi=| Δ PLi0|+|ΔPGi0|+|ΔPLi1|+|ΔPGi1|
When, it adjusts and stops；
Step 33: if wind-powered electricity generation is issued additional, receiving end regulating power is used up, and is not able to satisfy the sum of regulated quantity absolute value etc. in control unit still
It in wind-powered electricity generation additional issue amount, then adjusts and closes on control unit sending end, increase due to closing on controlled plant in control unit relation control unit
Big transmission distance, adjusting efficiency reduces, so setting lower sensitivity limit, in control unit, to close on control unit regulated quantity exhausted
Stop when being equal to wind-powered electricity generation additional issue amount or institute's adjusted position sensitivity lower than limit value to the sum of value；Regulated quantity is absolute in described control unit
It is worth and closes on the sum of control unit regulated quantity absolute value i.e. equal to wind-powered electricity generation additional issue amount:
The n be closed on control unit i and sending end sensitivity be greater than limit value control unit number；
If wind park, which is in, subtracts hair-like state, network loss is higher than monthly average network loss, repeats step 31- step 33；Network loss is lower than monthly average
Network loss does not apply decreasing loss regulation measure on the basis of meeting electric system active balance, because electric cost increases when wind-powered electricity generation subtracts hair
Add, it is appropriate to cut off high energy load.
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