CN108173293A - Meter and the new energy active power output maximum value on-line calculation method of operation of power networks constraint - Google Patents
Meter and the new energy active power output maximum value on-line calculation method of operation of power networks constraint Download PDFInfo
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- 230000035945 sensitivity Effects 0.000 claims description 55
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- H02J3/382—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses a kind of new energy active power output maximum value on-line calculation methods counted and operation of power networks constrains, and belong to dispatching automation of electric power systems technical field.The present invention proposes to estimate the online limit section of stable cross section first, then, meter and the online limit section intermediate value of stable cross section and peak regulation constraint, structure considers new energy power station, the new energy active power output that the power grid security of conventional power unit influences the indexs such as performance and economic and environment-friendly performance maximizes computation model, again security analysis is carried out for the operation of power networks state that optimization is calculated, and correct the online limit section of stable cross section, pass through iteration, obtain the operation of power networks state for meeting static security and peak regulation constraint, finally, transient state is carried out for the operating status and dynamic security is checked, and pass through iteration, it obtains meeting transient state, dynamic security and the operation of power networks state of peak regulation constraint, using the sum of corresponding new energy active power output as meter and the new energy active power output maximum value of operation of power networks constraint.
Description
Technical field
The invention belongs to dispatching automation of electric power systems technical fields, and more precisely, the present invention relates to a kind of meter and electricity
Net static state, transient state and the new energy active power output maximum value of dynamic security constraint and peak regulation constraint are in the method for line computation.
Background technology
Generation of electricity by new energy has the characteristics that intermittence and randomness, in order to dissolve new energy electric power to greatest extent, it is necessary to root
Real time execution regulation performance and economic ring according to new energy power station active power output estimated performance, new energy power station and conventional power unit
Guaranteed cost, and consider that new energy power station and conventional power unit active power output carry out the influence degree of powernet safety and stability characteristic
On-line scheduling.
A kind of patent " capability assessment method is received in generation of electricity by new energy online " (application number：201410456673.8) construct
The sum of new energy active power output with the periods all in dispatching cycle is up to target, considers that each period is conventional in dispatching cycle
The constraint of unit active power output bound, transformer and stable cross section effective power flow constrain, electric network active injection balance constrains and new
On the one hand the Optimized model of energy capacity of installed generator constraint, this method do not account for peak regulation constraint, on the other hand do not give yet
Go out how the active limit of stable cross section obtains." the grid-connected active power in power plant of meter and electricity trading program is real-time for patent
Control method " (application number：201610627240.3) equally do not provide how the active limit of stable cross section obtains in yet.
Actually state not only to grid equipment is thrown/stopped to the limit of stable cross section and power load distributing is related, also with new energy power station and often
The output for advising unit is related, therefore, do not calculate the output of new energy power station and conventional power unit and by power grid security it is steady
Fixed check is before that not can determine that stable cross section limit.It is calculated not using the offline limit or online limit at current time
Carry out moment new energy active power output maximum value, certainly exist the defects of computational accuracy is difficult to ensure.
Invention content
The present invention seeks to：For deficiency of the prior art, a kind of meter and power grid static state, transient state and dynamic security are proposed
Constraint and the new energy active power output maximum value on-line calculation method of peak regulation constraint.
The basic principle of the present invention is：On the basis of stabilization of power grids cross-section limitation section is estimated, considered by solving
Stable cross section limit constrains and the new energy active power output of peak regulation constraint maximizes model, and carry out static security to optimum results
It checks, according to security analysis modified result stabilization of power grids cross-section limitation section, meter and power grid can be obtained by by iteration
Static Security Constraints and the new energy active power output maximum value of peak regulation constraint.Again using stable cross section under this operating status it is active as
The limit upper limit of corresponding stable cross section, is checked by transient state and dynamic security, and stabilization of power grids section limit is corrected according to check result
Section residing for volume, the new energy active power output for taking the constraint of stable cross section limit and peak regulation constraint into consideration maximize model solution
Iteration, may finally be counted and power grid static state, transient state and dynamic security constrain and the new energy active power output of peak regulation constraint
Maximum value.Using new energy power station active power output estimated performance and regulation performance as new energy active power output in optimization aim
Weighting coefficient, being conducive to the active regulation and control instruction of new energy can more effectively perform；By new energy power station, routine in optimization aim
Unit Economic environmental-protecting performance and its active power output are to the influence degree of powernet security margin, respectively as new energy electricity
The weighting coefficient of active power output of standing and conventional power unit active power output is conducive to consider transmitting capacity of the electric wire netting fully rate and power grid as a whole
The synthesis of economic and environment-friendly performance is best.
Specifically, the present invention adopts the following technical solutions realize, include the following steps：
1) according to power grid regulation jurisdiction, power grid is divided into the electricity of Intranet and outer net, the wherein administration of this regulation and control center
Net is known as Intranet, is known as outer net with other power grids that Intranet is connected, if the power grid current time of running is t0, power grid is currently run
State is denoted as S0, by t0Shi Keben regulates and controls center monitoring and is denoted as A with the relevant stable cross section collection of generation of electricity by new energy, will comment online
Estimating the period is denoted as T, by (t0+ T) when carving copy regulation and control center monitoring and be denoted as B with the relevant stable cross section collection of generation of electricity by new energy, by S0
The associated security analysis fault set of i-th of stable cross section is denoted as F in lower B0i, by S0Each stable cross section is associated in lower B
The union of security analysis fault set is denoted as F0, respectively for S0Carry out F0In each failure security analysis, obtain in
In net each new energy station and conventional power unit active power output to power grid static security nargin in line sensitivity, by static security
Check mark is set as 0, enters step 2)；
The conventional power unit refers to the generator in other power stations in addition to new energy station in Intranet；
2) it for stable cross section each in B, is entered step 3) after carrying out following processing respectively；
If i-th of stable cross section belongs to A ∩ B and F in B0iMiddle institute is faulty can to keep static security, then passes through formula
(1) estimate it in (t0+ T) moment online limit section upper and lower bound, be denoted as P respectivelysc.lmt.i.u、Psc.lmt.i.d, and will
Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
If i-th of stable cross section belongs to A ∩ B and F in B0iIn at least one failure cannot keep static security, then pass through
Formula (2) estimates Psc.lmt.i.uAnd Psc.lmt.i.d, and by Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
If i-th of stable cross section belongs in BP is then estimated by formula (3)sc.lmt.i.uAnd Psc.lmt.i.d, and will
Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
In formula, SC is stable cross section sum, P in BεThe computational accuracy of new energy active power output maximum value for setting,
Psc.i.0For t0I-th stable cross section is active in moment B, if t0The online limit of i-th of stable cross section has passed through in moment B
It is calculated, then Psc.lmt.i.0For t0The online limit of i-th of stable cross section in moment B, otherwise, Psc.lmt.i.0For t0In moment B
The offline limit of i-th of stable cross section, Psc.lmt.i.1For (t0+ T) the offline limit of i-th of stable cross section, a in moment B1、a2For
Setup parameter, a1More than 1, a2Less than 1, (a1+a2)>2；
3) consider new energy power station active power output estimated performance, new energy power station and adaptation new energy electricity by solving
The maximized conventional power unit real time execution regulation performance of active power output of standing and economic and environment-friendly performance and new energy power station and adaptation
For the maximized conventional power unit active power output of new energy power station active power output to powernet safety margin sensitivity, meter and power grid are steady
The new energy active power output for determining cross-section limitation constraint and peak regulation constraint maximizes model, and obtaining each new energy station in Intranet has
The maximized conventional power unit active power output of new energy power station active power output is contributed and adapted to work(, enters step 4)；
4) respectively by t0The power factor of each load, new energy power station and conventional power unit is used as (t in moment Intranet0+T)
The power factor of corresponding load, new energy power station and conventional power unit in moment Intranet, according to (t0+ T) moment each load section
The burden with power predicted value of point and each new energy power station, the active power output of conventional power unit being calculated by step 3), meter
The load or burden without work of each load bus and each new energy power station and the idle output of conventional power unit are calculated, with reference to (t0+ T) moment
The active planned value and (t of plan and each time external contact line injection Intranet are thrown/stopped to Intranet equipment0+ T) moment outer net meter
It rows line mode, generates (the t including Intranet and outer net0+ T) moment operation of power networks state, it is denoted as S1, and by S1In lower B
The effective power flow of i stable cross section is denoted as Psc.i.1, enter step 5)；
5) if security analysis mark is 0, enters step 6), otherwise, enter step 10)；
6) by S1The associated security analysis fault set of i-th of stable cross section is denoted as F in lower Bsi, by S1It is each in lower B
The union of the associated security analysis fault set of stable cross section is denoted as Fs, respectively for S1Carry out FsIn each failure static state
It is active to update each new energy station and the adaptation maximized conventional power unit of new energy power station active power output in Intranet for Security Checking
It contributes to power grid static security nargin in line sensitivity, enters step 7)；
7) it for stable cross section each in B, is entered step 8) after carrying out following processing respectively：
If S1Lower FsiMiddle institute is faulty can to keep static security, then by Psc.lmt.i.dIt is updated to Psc.i.1, and will
Psc.lmt.i.dCheck mark be set as 1, otherwise, by Psc.lmt.i.uIt is updated to Psc.i.1, and by Psc.lmt.i.uCheck mark set
It is set to 1；
If Psc.lmt.i.uCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.uIt is updated to
(a1Psc.i.1+Pε/SC)；
If Psc.lmt.i.uCheck mark for 0 andThen will
Psc.lmt.i.uIt is updated to Psc.i.1, and by Psc.lmt.i.uCheck mark be set as 1；
If Psc.lmt.i.dCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.dIt is updated to
(a2Psc.i.1-Pε/SC)；
If 8) (t0+ T) in moment B each online limit section upper and lower bound of stable cross section check mark all for 1 and
Online limit siding-to-siding block length is both less than equal to Pε/ SC, then by security analysis traffic sign placement be 1, enter step 9), otherwise,
Return to step 3)；
9) for stable cross section each in B, respectively by Psc.lmt.i.dIt is updated to (a2Psc.lmt.i.u-Pε/ SC), and will
Psc.lmt.i.dCheck mark be set as 0, enter step 10)；
10) by S1The associated transient state of i-th of stable cross section and dynamic security check fault set and are denoted as F in lower Bti, by S1Lower B
In the associated transient state of each stable cross section and dynamic security check the union of fault set and be denoted as Ft, respectively for S1Carry out FtIn it is each
The transient state and dynamic security of a failure are checked, and are updated each new energy station in Intranet and are adapted to new energy power station active power output most
11) the conventional power unit active power output changed greatly in line sensitivity, enters step power grid transient state and dynamic security nargin；
11) it for stable cross section each in B, is entered step 12) after carrying out following processing respectively：
If S1Lower FtiMiddle institute is faulty can to keep transient state and dynamic security, then by Psc.lmt.i.dIt is updated to Psc.i.1, and will
Psc.lmt.i.dCheck mark be set as 1, otherwise, by Psc.lmt.i.uIt is updated to Psc.i.1；
If Psc.lmt.i.dCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.dIt is updated to
(a2Psc.i.1-Pε/SC)；
If 12) (t0+ T) in moment B each online limit section upper and lower bound of stable cross section flag bit all for 1 and
Line limit siding-to-siding block length is both less than equal to Pε/ SC, then by (t0+ T) the sum of active power output of all new energy stations in moment Intranet
As (t0+ T) moment counts and the new energy active power output maximum value of operation of power networks constraint, and respectively by stable cross section each in B
The average value of online limit section upper and lower bound is as its (t0+ T) moment online limit, return to step 1), otherwise, return
Step 3).
Above-mentioned technical proposal is further characterized by, and Optimized model is represented using formula (4) in the step 3)；
In formula, N is new energy station sum, α in Intranetn.i、βn.iRespectively in Intranet i-th of new energy station it is active go out
The estimated performance index of power and regulation performance index, when security analysis mark is 0, γn.iFor i-th in Intranet new energy
Source station active power output is to power grid static security nargin in line sensitivity, when security analysis mark is 1, γn.iIt is interior
In net i-th of new energy station active power output to power grid transient state and dynamic security nargin in line sensitivity, λn.iIt is in Intranet
The economic and environment-friendly composite of performance index of i new energy station unit quantity of electricity, overall target numerical value is bigger, represents economic and environment-friendly performance
It is higher, Pn.i.1For (t0+ T) active power output of i-th of new energy station, P in moment Intranetn.i.pre、aPn.i.preRespectively (t0+
T) in moment Intranet i-th of new energy station active power output predicted value and active power output lower limit, a be setting parameter；
G is that the maximized unit set of new energy active power output is adapted in Intranet conventional power unit, when security analysis mark
When will is 0, γm.iFor i-th of unit active power output in G to power grid static security nargin in line sensitivity, when static security school
When core mark is 1, γm.iFor i-th of unit active power output in G to power grid transient state and dynamic security nargin in line sensitivity,
λm,iFor the economic and environment-friendly composite of performance index of i-th of unit unit quantity of electricity in G, Pm.i.1For (t0+ T) i-th of unit in moment G
Active power output, Pm.max.i、Pm.min.iRespectively (t0+ T) the active power output upper and lower bound of i-th of unit, P in moment Gm.i.0
For t0The active power output of i-th of unit, V in moment Gm.iActive power output governing speed for i-th of unit in G；
H is the unit set that generates electricity according to plan in Intranet conventional power unit, Pm1.i.1For (t0+ T) i-th unit in moment H
Active plan is contributed, Pm1.i.0For t0The active power output of i-th of unit in moment H；
The sum of TL interconnections between intranet and extranet, Ptl.i.0For t0Moment wherein i-th time interconnection injects having for Intranet
Work(, Ptl.i.1For (t0+ T) moment wherein i-th time interconnection injection Intranet active planned value；
B is t0The Network Loss Rate of moment Intranet；
Psc.j.0For t0J-th stable cross section is active in moment B；Sn.j.iFor t0I-th of new energy station in moment Intranet
The active power output sensitivity active to j-th of stable cross section in B, Sm.j.iFor t0I-th of unit active power output is in B in moment G
The active sensitivity of j-th of stable cross section, Sm1.j.iFor t0I-th of unit active power output is to j-th of stable cross section in B in moment H
Active sensitivity, Stl.j.iFor t0I-th time interconnection injects the active to j-th in B of Intranet in moment Intranet external contact line
The active sensitivity of stable cross section, L are load bus sum, S in Intranetl.j.iFor t0There is i-th of load bus in moment Intranet
The work(sensitivity active to j-th of stable cross section in B, Pl.i.0For t0The burden with power of i-th of load bus in moment Intranet,
Pl.i.1For (t0+ T) the burden with power predicted value of i-th of load bus in moment Intranet；
E is t0The transmission facility sum of monitoring is overloaded in moment Intranet, by t0The transmission facility of monitoring is overloaded in moment Intranet
Set is denoted as TE, Pe.k.0Active, S for k-th of transmission facility in TEn.e.k.iFor t0I-th of new energy station in moment Intranet
The active power output sensitivity active to k-th of transmission facility in TE, Sm.e.k.iFor t0I-th of unit active power output is to TE in moment G
In the active sensitivity of k-th of transmission facility, Sm1.e.k.iFor t0I-th of unit active power output is to k-th of transmission of electricity in TE in moment H
The active sensitivity of equipment, Stl.e.k.iFor t0I-th time interconnection injects the active to TE of Intranet in moment Intranet external contact line
In the active sensitivity of k-th of transmission facility, Sl.e.k.iFor t0I-th of load bus is active defeated to k-th in TE in moment Intranet
The active sensitivity of electric equipment, Pe.lmt.kFor according to k-th of transmission facility t in TE0The power factor at moment is constant to be calculated
K-th of transmission facility overloads active limit；
TsTransient response active negative spare calculating time limit to be set according to grid operation codes, Pm'.min.iFor (t0+ T) when
Carve Intranet in i-th of conventional power unit in TsThe interior active power output minimum value that can be adjusted to, c is sets according to grid operation codes
The active negative spare capacity coefficient of Intranet transient response, d be (t0+ T) in moment Intranet new energy power station in TsIt is interior to participate in active bear
Spare proportionality coefficient.
By using above-mentioned technical proposal, the present invention achieves following technique effects：By in new energy active power output most
Using new energy power station active power output estimated performance and regulation performance as new energy active power output in the optimization aim that big value calculates
Weighting coefficient, being conducive to the active regulation and control instruction of new energy can more effectively perform, and realize in the total active command value phase of new energy
When the practical active power output of new energy maximization；It is in optimization aim that new energy power station, conventional power unit is economic and environment-friendly
Performance and its active power output to the influence degree of powernet security margin, respectively as new energy power station active power output and
The weighting coefficient of conventional power unit active power output is conducive to consider transmitting capacity of the electric wire netting utilization rate and electrical network economy environmental-protecting performance as a whole
Synthesis it is best.By preferentially carrying out security analysis, then using meet the stabilization of power grids cross-section limitations of Static Security Constraints as
The calculative strategy that the upper limit carries out transient state and dynamic security is checked, effectively increases overall calculation speed.By in Security Checking mistake
The online limit of stable cross section is searched in journey, compensates for and new energy receiving ability is calculated based on predetermined stable cross section limit,
There are transmitting capacity of the electric wire netting cannot make full use of the technological deficiency with security risk double risks.By during Security Checking
The sensitivity of new energy power station and conventional power unit active power output to power grid security nargin is constantly updated, has adapted to safety and stability characteristic
Complex electric network medium sensitivity with operation of power networks state significantly change requirement, can fully excavate power grid new energy electric power receive energy
Power.
Description of the drawings
Fig. 1 is the flow chart of the method for the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings.
The present embodiment is one embodiment of the present invention, flow as shown in Figure 1,
Step 1 in Fig. 1：According to power grid regulation jurisdiction, power grid is divided into Intranet and outer net, wherein this regulation and control center
The power grid of administration is known as Intranet, is known as outer net with other power grids that Intranet is connected, if the power grid current time of running is t0, by power grid
Current operating conditions are denoted as S0, by t0Shi Keben regulates and controls center monitoring and is denoted as A with the relevant stable cross section collection of generation of electricity by new energy,
The online evaluation period is denoted as T, by (t0+ T) when carving copy regulation and control center monitoring and with the relevant stable cross section collection of generation of electricity by new energy
B is denoted as, by S0The associated security analysis fault set of i-th of stable cross section is denoted as F in lower B0i, by S0Each stabilization in lower B
The union of the associated security analysis fault set of section is denoted as F0, respectively for S0Carry out F0In each failure static security
It checks, obtains in Intranet each new energy station and conventional power unit active power output to the online sensitive of power grid static security nargin
Security analysis traffic sign placement is 0, enters step 2 by degree；
The conventional power unit refers to the generator in other power stations in addition to new energy station in Intranet；
Step 2 in Fig. 1：For stable cross section each in B, 3 are entered step after carrying out following processing respectively；
If i-th of stable cross section belongs to A ∩ B and F in B0iMiddle institute is faulty can to keep static security, then passes through formula
(1) estimate it in (t0+ T) moment online limit section upper and lower bound, be denoted as P respectivelysc.lmt.i.u、Psc.lmt.i.d, and will
Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
If i-th of stable cross section belongs to A ∩ B and F in B0iIn at least one failure cannot keep static security, then pass through
Formula (2) estimates Psc.lmt.i.uAnd Psc.lmt.i.d, and by Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
If i-th of stable cross section belongs in BP is then estimated by formula (3)sc.lmt.i.uAnd Psc.lmt.i.d, and will
Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
In formula, SC is stable cross section sum, P in BεThe computational accuracy of new energy active power output maximum value for setting is led to
Standing 2%, the P for being set to new energy power station installed capacitysc.i.0For t0I-th stable cross section is active in moment B, if t0Moment B
In the online limit of i-th of stable cross section be obtained by calculation, then Psc.lmt.i.0For t0I-th stable cross section in moment B
Online limit, otherwise, Psc.lmt.i.0For t0The offline limit of i-th of stable cross section, P in moment Bsc.lmt.i.1For (t0+ T) moment B
In i-th of stable cross section offline limit, a1、a2For setup parameter, a1More than 1, a2Less than 1, (a1+a2)>2, usual a1It takes
1.15 a2Take 0.95；
Step 3 in Fig. 1：New energy power station active power output estimated performance, new energy power station are considered by solution and fitted
Answer the maximized conventional power unit real time execution regulation performance of new energy power station active power output and economic and environment-friendly performance and new energy
Power station and the maximized conventional power unit active power output of new energy power station active power output is adapted to powernet safety margin sensitivity,
Meter and the new energy active power output of the constraint of stabilization of power grids cross-section limitation and peak regulation constraint maximize model, obtain each new in Intranet
Energy station active power output and the adaptation maximized conventional power unit active power output of new energy power station active power output, enter step 4；
Wherein Optimized model is represented using formula (4)；
In formula, N is new energy station sum, α in Intranetn.i、βn.iRespectively in Intranet i-th of new energy station it is active go out
The estimated performance index of power and regulation performance index, when security analysis mark is 0, γn.iFor i-th in Intranet new energy
Source station active power output is to power grid static security nargin in line sensitivity, when security analysis mark is 1, γn.iIt is interior
In net i-th of new energy station active power output to power grid transient state and dynamic security nargin in line sensitivity, λn.iIt is in Intranet
The economic and environment-friendly composite of performance index of i new energy station unit quantity of electricity, overall target numerical value is bigger, represents economic and environment-friendly performance
It is higher, Pn.i.1For (t0+ T) active power output of i-th of new energy station, P in moment Intranetn.i.pre、aPn.i.preRespectively (t0+
T) in moment Intranet i-th of new energy station active power output predicted value and active power output lower limit, a be setting parameter (usually
It may be configured as 0.1)；
G is that the maximized unit set of new energy active power output is adapted in Intranet conventional power unit, when security analysis mark
When will is 0, γm.iFor i-th of unit active power output in G to power grid static security nargin in line sensitivity, when static security school
When core mark is 1, γm.iFor i-th of unit active power output in G to power grid transient state and dynamic security nargin in line sensitivity,
λm,iFor the economic and environment-friendly composite of performance index of i-th of unit unit quantity of electricity in G, Pm.i.1For (t0+ T) i-th of unit in moment G
Active power output, Pm.max.i、Pm.min.iRespectively (t0+ T) the active power output upper and lower bound of i-th of unit, P in moment Gm.i.0
For t0The active power output of i-th of unit, V in moment Gm.iActive power output governing speed for i-th of unit in G；
H is the unit set that generates electricity according to plan in Intranet conventional power unit, Pm1.i.1For (t0+ T) i-th unit in moment H
Active plan is contributed, Pm1.i.0For t0The active power output of i-th of unit in moment H；
The sum of TL interconnections between intranet and extranet, Ptl.i.0For t0Moment wherein i-th time interconnection injects having for Intranet
Work(, Ptl.i.1For (t0+ T) moment wherein i-th time interconnection injection Intranet active planned value；
B is t0The Network Loss Rate of moment Intranet；
Psc.j.0For t0J-th stable cross section is active in moment B；Sn.j.iFor t0I-th of new energy station in moment Intranet
The active power output sensitivity active to j-th of stable cross section in B, Sm.j.iFor t0I-th of unit active power output is in B in moment G
The active sensitivity of j-th of stable cross section, Sm1.j.iFor t0I-th of unit active power output is to j-th of stable cross section in B in moment H
Active sensitivity, Stl.j.iFor t0I-th time interconnection injects the active to j-th in B of Intranet in moment Intranet external contact line
The active sensitivity of stable cross section, L are load bus sum, S in Intranetl.j.iFor t0There is i-th of load bus in moment Intranet
The work(sensitivity active to j-th of stable cross section in B, Pl.i.0For t0The burden with power of i-th of load bus in moment Intranet,
Pl.i.1For (t0+ T) the burden with power predicted value of i-th of load bus in moment Intranet；
E is t0The transmission facility sum of monitoring is overloaded in moment Intranet, by t0The transmission facility of monitoring is overloaded in moment Intranet
Set is denoted as TE, Pe.k.0Active, S for k-th of transmission facility in TEn.e.k.iFor t0I-th of new energy station in moment Intranet
The active power output sensitivity active to k-th of transmission facility in TE, Sm.e.k.iFor t0I-th of unit active power output is to TE in moment G
In the active sensitivity of k-th of transmission facility, Sm1.e.k.iFor t0I-th of unit active power output is to k-th of transmission of electricity in TE in moment H
The active sensitivity of equipment, Stl.e.k.iFor t0I-th time interconnection injects the active to TE of Intranet in moment Intranet external contact line
In the active sensitivity of k-th of transmission facility, Sl.e.k.iFor t0I-th of load bus is active defeated to k-th in TE in moment Intranet
The active sensitivity of electric equipment, Pe.lmt.kFor according to k-th of transmission facility t in TE0The power factor at moment is constant to be calculated
K-th of transmission facility overloads active limit；
TsThe transient response active negative spare calculating time limit to be set according to grid operation codes, such as 3 minutes, Pm'.min.i
For (t0+ T) in moment Intranet i-th of conventional power unit in TsThe interior active power output minimum value that can be adjusted to, c is transports according to power grid
The active negative spare capacity coefficient of Intranet transient response of professional etiquette journey setting, such as 0.02, d are (t0+ T) new energy in moment Intranet
Power station is in TsIt is interior to participate in active negative spare proportionality coefficient (usually may be configured as 0.1).
Step 4 in Fig. 1：Respectively by t0The power factor of each load, new energy power station and conventional power unit in moment Intranet
As (t0+ T) power factor of corresponding load, new energy power station and conventional power unit in moment Intranet, according to (t0+ T) moment is each
The burden with power predicted value of a load bus and each new energy power station being calculated by step 3, conventional power unit it is active
It contributes, the load or burden without work of each load bus and each new energy power station and the idle output of conventional power unit is calculated, with reference to (t0
+ T) moment Intranet equipment throws/stop plan and each time external contact line injects the active planned value and (t of Intranet0+ T) outside the moment
The plan method of operation of net generates the (t including Intranet and outer net0+ T) moment operation of power networks state, it is denoted as S1, and by S1
The effective power flow of i-th of stable cross section is denoted as P in lower Bsc.i.1, enter step 5；
Step 5 in Fig. 1：If security analysis mark is 0,6 are entered step, otherwise, enters step 10；
Step 6 in Fig. 1：By S1The associated security analysis fault set of i-th of stable cross section is denoted as F in lower Bsi, by S1
The union of each associated security analysis fault set of stable cross section is denoted as F in lower Bs, respectively for S1Carry out FsIn it is each therefore
The security analysis of barrier updates each new energy station in Intranet and adapts to new energy power station active power output maximumlly routine
Unit active power output in line sensitivity, enters step 7 to power grid static security nargin；
Step 7 in Fig. 1：For stable cross section each in B, 8 are entered step after carrying out following processing respectively：
If S1Lower FsiMiddle institute is faulty can to keep static security, then by Psc.lmt.i.dIt is updated to Psc.i.1, and will
Psc.lmt.i.dCheck mark be set as 1, otherwise, by Psc.lmt.i.uIt is updated to Psc.i.1, and by Psc.lmt.i.uCheck mark set
It is set to 1；
If Psc.lmt.i.uCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.uIt is updated to
(a1Psc.i.1+Pε/SC)；
If Psc.lmt.i.uCheck mark for 0 andThen will
Psc.lmt.i.uIt is updated to Psc.i.1, and by Psc.lmt.i.uCheck mark be set as 1；
If Psc.lmt.i.dCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.dIt is updated to
(a2Psc.i.1-Pε/SC)；
Step 8 in Fig. 1：If (t0+ T) the check mark of each online limit section upper and lower bound of stable cross section in moment B
Will is all both less than equal to P for 1 and online limit siding-to-siding block lengthεSecurity analysis traffic sign placement is then 1, entered step by/SC
9, otherwise, return to step 3；
Step 9 in Fig. 1：For stable cross section each in B, respectively by Psc.lmt.i.dIt is updated to (a2Psc.lmt.i.u-Pε/SC),
And by Psc.lmt.i.dCheck mark be set as 0, enter step 10；
Step 10 in Fig. 1：By S1The associated transient state of i-th of stable cross section and dynamic security are checked fault set and are denoted as in lower B
Fti, by S1The associated transient state of each stable cross section and dynamic security check the union of fault set and are denoted as F in lower Bt, respectively for S1
Carry out FtIn each failure transient state and dynamic security check, update Intranet in each new energy station and adapt to new energy power station
The maximized conventional power unit active power output of active power output in line sensitivity, enters step power grid transient state and dynamic security nargin
11；
Step 11 in Fig. 1：For stable cross section each in B, 12 are entered step after carrying out following processing respectively：
If S1Lower FtiMiddle institute is faulty can to keep transient state and dynamic security, then by Psc.lmt.i.dIt is updated to Psc.i.1, and will
Psc.lmt.i.dCheck mark be set as 1, otherwise, by Psc.lmt.i.uIt is updated to Psc.i.1；
If Psc.lmt.i.dCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.dIt is updated to
(a2Psc.i.1-Pε/SC)；
Step 12 in Fig. 1：If (t0+ T) flag bit of each online limit section upper and lower bound of stable cross section in moment B
All both less than it is equal to P for 1 and online limit siding-to-siding block lengthε/ SC, then by (t0+ T) all new energy stations has in moment Intranet
The sum of work(output is used as (t0+ T) moment counts and the new energy active power output maximum value of operation of power networks constraint, and respectively will be each in B
The average value of a online limit section upper and lower bound of stable cross section is as its (t0+ T) moment online limit, return to step 1,
Otherwise, return to step 3.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for limiting the present invention's.Not
It is detached from the spirit and scope of the present invention, any equivalence changes done or retouching, also belongs to the protection domain of the present invention.Cause
This protection scope of the present invention should be using the content that claims hereof is defined as standard.
Claims (2)
1. meter and the new energy active power output maximum value on-line calculation method of operation of power networks constraint, which is characterized in that including following
Step：
1) according to power grid regulation jurisdiction, power grid is divided into Intranet and outer net, the power grid of wherein this regulation and control center administration claims
For Intranet, it is known as outer net with other power grids that Intranet is connected, if the power grid current time of running is t0, by power grid current operating conditions
It is denoted as S0, by t0Shi Keben regulates and controls center monitoring and is denoted as A with the relevant stable cross section collection of generation of electricity by new energy, by online evaluation week
Phase is denoted as T, by (t0+ T) when carving copy regulation and control center monitoring and be denoted as B with the relevant stable cross section collection of generation of electricity by new energy, by S0Lower B
In the associated security analysis fault set of i-th of stable cross section be denoted as F0i, by S0Each associated static state of stable cross section in lower B
The union of Security Checking fault set is denoted as F0, respectively for S0Carry out F0In each failure security analysis, obtain in Intranet
Each new energy station and conventional power unit active power output to power grid static security nargin in line sensitivity, by security analysis
Traffic sign placement is 0, is entered step 2)；
The conventional power unit refers to the generator in other power stations in addition to new energy station in Intranet；
2) it for stable cross section each in B, is entered step 3) after carrying out following processing respectively；
If i-th of stable cross section belongs to A ∩ B and F in B0iMiddle institute is faulty can to keep static security, then is estimated by formula (1)
It is calculated in (t0+ T) moment online limit section upper and lower bound, be denoted as P respectivelysc.lmt.i.u、Psc.lmt.i.d, and will
Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
If i-th of stable cross section belongs to A ∩ B and F in B0iIn at least one failure cannot keep static security, then pass through formula
(2) P is estimatedsc.lmt.i.uAnd Psc.lmt.i.d, and by Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
If i-th of stable cross section belongs in BP is then estimated by formula (3)sc.lmt.i.uAnd Psc.lmt.i.d, and will
Psc.lmt.i.uAnd Psc.lmt.i.dCheck mark be both configured to 0；
In formula, SC is stable cross section sum, P in BεThe computational accuracy of new energy active power output maximum value for setting, Psc.i.0For
t0I-th stable cross section is active in moment B, if t0The online limit of i-th of stable cross section is by calculating in moment B
It arrives, then Psc.lmt.i.0For t0The online limit of i-th of stable cross section in moment B, otherwise Psc.lmt.i.0For t0In moment B i-th it is steady
Determine the offline limit of section, Psc.lmt.i.1For (t0+ T) the offline limit of i-th of stable cross section, a in moment B1It is set to be more than 1
Determine parameter, a2To be less than 1 setup parameter, and there is (a1+a2)>2；
3) have by solving to consider new energy power station active power output estimated performance, new energy power station and adapt to new energy power station
The work(maximized conventional power unit real time execution regulation performance of output and economic and environment-friendly performance and new energy power station and the new energy of adaptation
Active power output maximized conventional power unit active power output in source power station breaks to powernet safety margin sensitivity, meter and the stabilization of power grids
The new energy active power output of the constraint of face limit and peak regulation constraint maximizes model, obtain each new energy station in Intranet it is active go out
4) power and the adaptation maximized conventional power unit active power output of new energy power station active power output, enter step；
4) respectively by t0The power factor of each load, new energy power station and conventional power unit is used as (t in moment Intranet0+ T) moment
The power factor of corresponding load, new energy power station and conventional power unit in Intranet, according to (t0+ T) moment each load bus
Burden with power predicted value and each new energy power station being calculated by step 3), the active power output of conventional power unit, calculate
The idle output of the load or burden without work of each load bus and each new energy power station and conventional power unit, with reference to (t0+ T) moment Intranet
The active planned value and (t of plan and each time external contact line injection Intranet are thrown/stopped to equipment0+ T) moment outer net plan fortune
Line mode generates the (t including Intranet and outer net0+ T) moment operation of power networks state, it is denoted as S1, and by S1I-th in lower B
The effective power flow of stable cross section is denoted as Psc.i.1, enter step 5)；
5) if security analysis mark is 0, enters step 6), otherwise, enter step 10)；
6) by S1The associated security analysis fault set of i-th of stable cross section is denoted as F in lower Bsi, by S1Each stabilization is broken in lower B
The union of the associated security analysis fault set in face is denoted as Fs, respectively for S1Carry out FsIn each failure static security school
Core updates each new energy station in Intranet and adapts to the maximized conventional power unit active power output pair of new energy power station active power output
Power grid static security nargin in line sensitivity, enter step 7)；
7) it for stable cross section each in B, is entered step 8) after carrying out following processing respectively：
If S1Lower FsiMiddle institute is faulty can to keep static security, then by Psc.lmt.i.dIt is updated to Psc.i.1, and by Psc.lmt.i.d's
Check mark is set as 1, otherwise, by Psc.lmt.i.uIt is updated to Psc.i.1, and by Psc.lmt.i.uCheck mark be set as 1；
If Psc.lmt.i.uCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.uIt is updated to
(a1Psc.i.1+Pε/SC)；
If Psc.lmt.i.uCheck mark for 0 andThen by Psc.lmt.i.uIt is updated to
Psc.i.1, and by Psc.lmt.i.uCheck mark be set as 1；
If Psc.lmt.i.dCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.dIt is updated to
(a2Psc.i.1-Pε/SC)；
If 8) (t0+ T) check mark of each online limit section upper and lower bound of stable cross section is all 1 and online limit in moment B
Volume siding-to-siding block length is both less than equal to PεSecurity analysis traffic sign placement is then 1, entered step 9) by/SC, otherwise, returns to step
It is rapid 3)；
9) for stable cross section each in B, respectively by Psc.lmt.i.dIt is updated to (a2Psc.lmt.i.u-Pε/ SC), and by Psc.lmt.i.d's
Check mark is set as 0, enters step 10)；
10) by S1The associated transient state of i-th of stable cross section and dynamic security check fault set and are denoted as F in lower Bti, by S1It is each in lower B
The union that the associated transient state of a stable cross section and dynamic security check fault set is denoted as Ft, respectively for S1Carry out FtIn it is each therefore
The transient state and dynamic security of barrier are checked, and are updated each new energy station in Intranet and are adapted to the maximization of new energy power station active power output
Conventional power unit active power output to power grid transient state and dynamic security nargin in line sensitivity, enter step 11)；
11) it for stable cross section each in B, is entered step 12) after carrying out following processing respectively：
If S1Lower FtiMiddle institute is faulty can to keep transient state and dynamic security, then by Psc.lmt.i.dIt is updated to Psc.i.1, and will
Psc.lmt.i.dCheck mark be set as 1, otherwise, by Psc.lmt.i.uIt is updated to Psc.i.1；
If Psc.lmt.i.dCheck mark be 0 and (Psc.lmt.i.u-Psc.lmt.i.d)≤Pε/ SC, then by Psc.lmt.i.dIt is updated to
(a2Psc.i.1-Pε/SC)；
If 12) (t0+ T) flag bit of each online limit section upper and lower bound of stable cross section is all 1 and online limit in moment B
Volume siding-to-siding block length is both less than equal to Pε/ SC, then by (t0+ T) the sum of active power output of all new energy stations conduct in moment Intranet
(t0+ T) moment counts and the new energy active power output maximum value of operation of power networks constraint, and respectively that stable cross section each in B is online
The average value of limit section upper and lower bound is as its (t0+ T) moment online limit, return to step 1), otherwise, return to step
3)。
2. meter according to claim 1 and the new energy active power output maximum value on-line calculation method of operation of power networks constraint,
It is characterized in that, Optimized model is represented using formula (4) in the step 3)；
In formula, N is new energy station sum in Intranet；αn.i、βn.iI-th new energy station active power output respectively in Intranet
Estimated performance index and regulation performance index；When security analysis mark is 0, γn.iFor i-th of new energy field in Intranet
Active power output of standing is to power grid static security nargin in line sensitivity, when security analysis mark is 1, γn.iFor in Intranet
I-th of new energy station active power output is to power grid transient state and dynamic security nargin in line sensitivity；λn.iIt is i-th in Intranet
The economic and environment-friendly composite of performance index of new energy station unit quantity of electricity, overall target numerical value is bigger, represents that economic and environment-friendly performance is got over
It is high；Pn.i.1For (t0+ T) active power output of i-th of new energy station, P in moment Intranetn.i.pre、aPn.i.preRespectively (t0+T)
The active power output predicted value and active power output lower limit of i-th of new energy station in moment Intranet, a are the parameter of setting；
G is that the maximized unit set of new energy active power output is adapted in Intranet conventional power unit；When security analysis mark is 0
When, γm.iFor i-th of unit active power output in G to power grid static security nargin in line sensitivity, when security analysis mark
When will is 1, γm.iFor i-th of unit active power output in G to power grid transient state and dynamic security nargin in line sensitivity；λm,iFor G
In i-th of unit unit quantity of electricity economic and environment-friendly composite of performance index；Pm.i.1For (t0+ T) i-th unit is active in moment G
It contributes, Pm.max.i、Pm.min.iRespectively (t0+ T) the active power output upper and lower bound of i-th of unit, P in moment Gm.i.0For t0When
Carve the active power output of i-th of unit in G；Vm.iActive power output governing speed for i-th of unit in G；
H is the unit set that generates electricity according to plan in Intranet conventional power unit, Pm1.i.1For (t0+ T) i-th unit is active in moment H
Plan is contributed, Pm1.i.0For t0The active power output of i-th of unit in moment H；
The sum of TL interconnections between intranet and extranet, Ptl.i.0For t0Moment wherein i-th time interconnection injects the active of Intranet,
Ptl.i.1For (t0+ T) moment wherein i-th time interconnection injection Intranet active planned value；
B is t0The Network Loss Rate of moment Intranet；
Psc.j.0For t0J-th stable cross section is active in moment B；Sn.j.iFor t0I-th of new energy station is active in moment Intranet
The output sensitivity active to j-th of stable cross section in B, Sm.j.iFor t0I-th of unit active power output is to j-th in B in moment G
The active sensitivity of stable cross section, Sm1.j.iFor t0I-th of unit active power output is active to j-th of stable cross section in B in moment H
Sensitivity, Stl.j.iFor t0Active the stablizing to j-th in B of i-th time interconnection injection Intranet in moment Intranet external contact line
The active sensitivity of section, L are load bus sum, S in Intranetl.j.iFor t0I-th of load bus is active to B in moment Intranet
In the active sensitivity of j-th of stable cross section, Pl.i.0For t0The burden with power of i-th of load bus, P in moment Intranetl.i.1For
(t0+ T) the burden with power predicted value of i-th of load bus in moment Intranet；
E is t0The transmission facility sum of monitoring is overloaded in moment Intranet, by t0The transmission facility set of monitoring is overloaded in moment Intranet
It is denoted as TE, Pe.k.0Active, S for k-th of transmission facility in TEn.e.k.iFor t0I-th of new energy station is active in moment Intranet
The output sensitivity active to k-th of transmission facility in TE, Sm.e.k.iFor t0I-th of unit active power output is in TE in moment G
The active sensitivity of k transmission facility, Sm1.e.k.iFor t0I-th of unit active power output is to k-th of transmission facility in TE in moment H
Active sensitivity, Stl.e.k.iFor t0I-th time interconnection injects the active to kth in TE of Intranet in moment Intranet external contact line
The active sensitivity of a transmission facility, Sl.e.k.iFor t0I-th of load bus is active in moment Intranet sets k-th of transmission of electricity in TE
Have the sensitivity of work(, Pe.lmt.kFor according to k-th of transmission facility t in TE0The constant kth being calculated of the power factor at moment
A transmission facility overloads active limit；
TsTransient response active negative spare calculating time limit to be set according to grid operation codes, Pm'.min.iFor (t0+ T) in the moment
I-th of conventional power unit is in T in netsThe interior active power output minimum value that can be adjusted to, c are according in grid operation codes setting
The active negative spare capacity coefficient of net transient response, d are (t0+ T) in moment Intranet new energy power station in TsInterior participation is active negative spare
Proportionality coefficient.
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