CN104574203A - Real-time generation schedule and closed-loop control evaluation analysis method thereof - Google Patents
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Abstract
The invention discloses a real-time generation schedule and a closed-loop control evaluation analysis method thereof. The closed-loop control evaluation analysis method is characterized by comprising the following steps: determining the real-time generation schedule and closed-loop control unit cluster classification; calculating a real-time generation schedule (CGS) regulating standby demand index; calculating a real-time generation schedule regulating standby adequacy index; calculating a power grid security monitoring index; calculating a real-time generation scheme closed-loop control depth index. The real-time generation schedule and the closed-loop control evaluation analysis key indicator and calculating method thereof are scientific and reasonable; the closed-loop control effect is objectively evaluated, and the tracking situation of the generation unit to the real-time scheme is analyzed online and immediately fed back, so as to form the more effective closed-loop control strategy, improve the real-time power grid running risk response capability, meanwhile reduce the manual intervention of scheduling operators and the frequently repeated regulating situation of a lot of units, prolong the service life of the generator unit, and improve the economic benefit of a power plant.
Description
Technical field
The invention belongs to dispatching automation of electric power systems field, relate to a kind of real-time generation schedule and closed-loop control analysis and assessment method thereof.
Background technology
In recent years, the coordination of China's extra-high voltage and electrical network at different levels is fast-developing, is progressively forming super-huge alternating current-direct current electrical network, along with electric power networks scale is increasing, operation of power networks is day by day complicated, and peak-frequency regulation pressure day by day increases, and dissimilar, different control objectives unit operation patten transformation is frequent.Improve Automatic Generation Control (AGC) Mass Control, real-time generation schedule must be relied on to carry out electrical network three frequency modulation according to system loading trend, the generation schedule of plan unit is followed the tracks of in adjustment, avoid the frequent adjustment of unit and the unreasonable distribution of climbing resource, and then affect power grid security and economic benefit.And the key improving real-time generation schedule and closed-loop control quality thereof is the different running statuses according to electrical network, give full play to the effect of AGC unit and Real-Time Scheduling unit, realize the Optimum Regulation of all kinds of unit allocation role and pondage.It is many that real-time generation schedule and closed loop control process thereof involve link, improves closed-loop control level, also must Erecting and improving rational real-time generation schedule closed-loop control analysis and assessment method and evaluation index system.By comprehensive, rational evaluation closed-loop control effect, on-line analysis genset to the tracking situation of in real time plan and immediate feedback, forms more effective Closed-loop Control Strategy, to tackle electrical network real time execution risk.And at present real-time generation schedule and closed-loop control thereof is still in in-depth research and trial period, lack comprehensively, rationally, analysis and assessment index system targetedly, be difficult to make science objective appraisal to closed-loop control effect.
Summary of the invention
For solving deficiency of the prior art, the invention provides a kind of scientific and effective real-time generation schedule and closed-loop control analysis and assessment method thereof, result of calculation is optimized based on real-time generation schedule closed-loop control, electrical network real-time running data, AGC On-line Control data, real-time generation schedule unit allocation parameter, unit allocation Partition of role method and the adjustment standby requirement with real-time generation schedule Closed-loop Control Strategy strong correlation are proposed, regulate abundant intensity index for subsequent use, power grid security monitors index, closed-loop control depth factor index definition and computing method, following feedback closed-loop control situation, control to provide decision-making foundation to operation of power networks for forming more effectively Closed-loop Control Strategy and yardman.
In order to realize above-mentioned target, the present invention adopts following technical scheme: a kind of real-time generation schedule and closed-loop control analysis and assessment method thereof, is characterized in that, comprise step:
(1) real-time generation schedule and closed-loop control unit cluster classification thereof: issue passage according to AGC On-line Control information, real-time generation schedule unit allocation parameter and plan and real-time generation schedule is dispatched unit be divided into three major types: follow the tracks of ACE unit cluster (CPS Generator Set, CGS) plan unit cluster (Schedule Generator Set, is followed the tracks of, and artificial mode unit cluster (Manual Generator Set, MGS) SGS); Wherein, CGS is the unit set participating in ACE adjustment in AGC unit; SGS is the unit set following the tracks of planned value; MGS is that power plant dispatches unit set voluntarily;
(2) real-time generation schedule is followed the tracks of ACE unit cluster CGS and is regulated standby requirement to calculate: actually to exert oneself according to the prediction of ultra-short term system loading, unit, AGC On-line Control information, consider the predicated error of system loading, wave characteristic factor simultaneously, calculate CGS and regulate standby requirement;
CGS upper adjustment standby requirement computing formula is:
Standby requirement computing formula is regulated to be under CGS:
In formula, i is unit subscript, and t is moment subscript, R
u,twith R
d,tbe respectively the upper and lower adjustment standby requirement of CGS of t, R
bfor CGS regulates base value for subsequent use, L
tfor the prediction of t system loading, L
t+1for the prediction of t+1 moment system loading, P
i,tfor t does not belong to, the unit of CGS cluster is meritorious exerts oneself, P
i, t+1for the t+1 moment does not belong to, the unit of CGS cluster is meritorious exerts oneself, δ
u, δ
dbe respectively the power network fluctuation correction factor that the upper and lower adjustment of CGS is for subsequent use;
(3) calculate real-time generation schedule CGS and regulate adequacy indexes for subsequent use: the upper adjustment of CGS adequacy indexes computing formula for subsequent use is:
Adequacy indexes computing formula for subsequent use is regulated to be under CGS:
In formula, the upper and lower adjustment that U and D is respectively CGS cluster t is for subsequent use, and K is the constant truth of a matter of exponential function, 0<K<1, U
maxwith U
minthe CGS calculated according to step (2) being respectively t regulates the upper limit for subsequent use and lower limit, D
maxwith D
minthe upper limit for subsequent use and lower limit is regulated under being respectively the CGS calculated according to step (2) of t;
(4) power grid security monitors index calculate: power grid security monitors that index calculate formula is as follows:
S＝A
m*n×100％ (5)
In formula, A is the constant truth of a matter of exponential function, 0<A<1, m is equipment heavy duty rate, n is the weight accumulated value of heavy duty and out-of-limit equipment, and be defined as: n=heave-load device number+Q × out-of-limit number of devices, Q is weight regulating parameter, get the integer being greater than 1, emphasize that equipment is out-of-limit even more serious than case of heavy load by setting Q value;
(5) real-time generation schedule closed-loop control depth factor index calculate: closed-loop control depth factor index Y computing formula is as follows:
Y＝C
(100-x)*(100-z)×100％ (6)
In formula, C is the constant truth of a matter of exponential function, and 0<C<1, x are SGS cluster unit number of units accounting, and z is SGS cluster unit capacity accounting, and when C value is less, Y attenuation trend is more obvious.
Aforesaid a kind of real-time generation schedule and closed-loop control analysis and assessment method thereof, is characterized in that: in step (2), comprises two component: the R in left and right on the right side of described closed loop adjustment standby requirement computing formula equal sign
bvalue is with reference to the control criterion requirement of AGC; The right component is network load variation tendency component, by in load variations amount, the generating that deduction SGS, MGS unit cluster is born is gained merit incremental portion, all the other are CGS clustered control link needs the generating born to gain merit incremental portion, according to electrical network actual fluctuation situation adjustment power network fluctuation correction factor, realize climbing peak stage CGS at load and raise spare space more greatly, otherwise regulate spare space larger under the stage CGS of load landslide; δ
u, δ
dspan is respectively 0.95< δ
u<1.05,0.95< δ
d<1.05.
Aforesaid a kind of real-time generation schedule and closed-loop control analysis and assessment method thereof, it is characterized in that: in described step (3), when CGS regulates standby requirement between adjustment standby requirement upper and lower bound, regulate adequacy indexes L value for subsequent use to be 100%, show for subsequent use satisfying the demands; CGS regulates for subsequent use being greater than in limited time, and L is greater than 1, shows too much for subsequent use; CGS prescribes a time limit under regulating for subsequent use being less than, and L is less than 1, shows deficiency for subsequent use; L departs from larger, then index is poorer, surplus for subsequent use or deficiency more serious.
Aforesaid a kind of real-time generation schedule and closed-loop control analysis and assessment method thereof, is characterized in that: in described step (4), S is less, show power grid heavy-load and out-of-limit equipment more, monitor index poorer; S value is larger, shows that index is more excellent; When p or q is 0, S gets maximal value 1, shows that now electrical network is without heavy duty and out-of-limit equipment.
Aforesaid a kind of real-time generation schedule and closed-loop control analysis and assessment method thereof, is characterized in that: in described step (5), when system closed loop degree is higher, and extreme case is that whole unit all belongs to SGS cluster, and x, z are 1, then Y value is 1; When system closed loop degree is lower, extreme case is that whole unit all belongs to CGS cluster, and x, z are 0, then Y value is tending towards 0.
The beneficial effect that the present invention reaches:
(1) propose to be applicable to real-time generation schedule and closed-loop control thereof the computer-assisted classification method according to closed-loop control assemblage classification, solve traditional according to the division methods such as unit energy Source Type, AGC control model can not with the unit research range Rational Matching of Closed-loop Control Strategy, this is the basis of real-time generation schedule and Closed-loop Control Strategy optimization and analysis and assessment;
(2) evaluation index and the computing method that monitor index, closed-loop control depth factor based on the adjustment abundant intensity index for subsequent use of the nonlinear real-time generation schedule of exponential function and closed-loop control thereof, power grid security are proposed, monitor real-time generation schedule and AGC closed-loop control situation, the not adaptation issues existed in solution conventional linear index characterization time variation and the more and more stronger extra-high voltage alternating current-direct current hybrid power system of nonlinear characteristic;
(3) propose to be applicable to the different operating condition of real-time generation schedule and closed-loop control thereof and regulate standby requirement index and computing method, avoid tradition according to load trend fixed proportion or pure artificial experience set-up mode, solve the quantum chemical method problem of AGC in different operating condition frequency modulation resource requirement difference;
By real-time generation schedule of the present invention and closed-loop control analysis and assessment method thereof, establish scientific and rational real-time generation schedule closed-loop control analysis and assessment critical index and computing method, by objective evaluation closed-loop control effect, on-line analysis genset is to the tracking situation of in real time plan and immediate feedback, form more effective Closed-loop Control Strategy, improve reply electrical network real time execution risk ability.
Accompanying drawing explanation
Fig. 1 is real-time generation schedule and closed-loop control analysis and assessment method flow schematic diagram thereof.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Real-time generation schedule and closed-loop control thereof generally start a real-time generation schedule establishment for every 5 minutes, after planning completes, unit generation plan and the suggestion of the control model after optimizing are sent AGC and perform.The present invention according to electrical network real time execution situation, following operation of power networks is predicted as the optimization of real-time generation schedule Closed-loop Control Strategy provides rational standby requirement to retrain, and generation schedule is performed in real time to AGC and participate in regulating in electrical network adjustment process change for subsequent use, power flow changing, closed-loop control situation carry out Online statistics based on evaluation index and analysis, for yardman make in time intervene and next time in real time planning optimization calculate decision-making foundation be provided.
A kind of real-time generation schedule and closed-loop control analysis and assessment method thereof, is characterized in that, comprise the following steps:
(1) real-time generation schedule and closed-loop control unit cluster classification thereof: issue passage according to AGC On-line Control information, real-time generation schedule unit allocation parameter and plan and real-time generation schedule is dispatched unit be divided into three major types, form closed-loop control unit cluster belonging to unit: follow the tracks of ACE unit cluster (CPS Generator Set, CGS) plan unit cluster (Schedule Generator Set, is followed the tracks of, and artificial mode unit cluster (Manual Generator Set, MGS) SGS); Wherein, CGS is the unit set participating in ACE adjustment in AGC unit; SGS is the unit set following the tracks of planned value; MGS is that power plant dispatches unit set voluntarily; One of real-time generation schedule closed-loop control Key Strategy is exactly reasonably regulate standby requirement according to the following CGS cluster of operation of power networks performance analysis, realizes the optimum dynamic transfer of pondage and unit allocation pattern between CGS and SGS cluster;
(2) real-time generation schedule CGS regulates standby requirement to calculate: it is that AGC fluctuates for real-time response system frequency that CGS regulates for subsequent use, eliminates the keystone resources of power grid control deviation; Actually to exert oneself according to the prediction of ultra-short term system loading, unit, AGC On-line Control information, consider the predicated error of system loading, wave characteristic factor simultaneously, calculate CGS and regulate standby requirement;
The upper adjustment of CGS computing formula for subsequent use is as follows:
Regulate computing formula for subsequent use as follows under CGS:
In formula, i is unit subscript, and t is moment subscript, R
u,twith R
d,tbe respectively the upper and lower adjustment standby requirement of CGS of t, R
bfor CGS regulates base value for subsequent use, L
tfor the prediction of t system loading, L
t+1for the prediction of t+1 moment system loading, P
i,tfor t does not belong to, the unit of CGS cluster is meritorious exerts oneself, P
i, t+1for the t+1 moment does not belong to, the unit of CGS cluster is meritorious exerts oneself, δ
u, δ
dbe respectively the power network fluctuation correction factor that the upper and lower adjustment of CGS is for subsequent use, desirable 0.95< δ
u<1.05,0.95< δ
d<1.05;
CGS regulates on the right side of standby requirement computing formula equal sign and comprises two component: the R in left and right
bvalue, with reference to the control criterion requirement of AGC, is considered prediction load, predicated error, reliability factor, is set to certain proportion or a fixed value of system loading; The right component is network load variation tendency component, by in load variations amount, the generating that deduction SGS, MGS unit cluster is born is gained merit incremental portion, the remaining CGS clustered control link that is needs the generating born to gain merit incremental portion, according to electrical network actual fluctuation situation adjustment power network fluctuation correction factor, realize climbing peak stage CGS at load and raise spare space more greatly, otherwise regulate spare space larger under the stage CGS of load landslide.
(3) calculating real-time generation schedule CGS regulates adequacy indexes for subsequent use to calculate: it is the important content of management and running People Analysis closed-loop control result of calculation rationality, following operation of power networks whether safety that real-time generation schedule CGS regulates for subsequent use, and the margin index for subsequent use of the adjustment based on nonlinear exponent function provides result that is more directly perceived, quantification;
The upper adjustment of CGS adequacy indexes computing formula for subsequent use is:
Adequacy indexes computing formula for subsequent use is regulated to be under CGS:
In formula, the upper and lower adjustment that U and D is respectively CGS cluster t is for subsequent use, and K is the constant truth of a matter of exponential function, 0<K<1, U
maxwith U
minthe CGS calculated according to step (2) being respectively t regulates the upper limit for subsequent use and lower limit, D
maxwith D
minthe upper limit for subsequent use and lower limit is regulated under being respectively the CGS calculated according to step (2) of t;
When CGS regulates standby requirement between adjustment standby requirement upper and lower bound, regulate adequacy indexes L value for subsequent use to be 100%, show for subsequent use satisfying the demands; CGS regulates for subsequent use being greater than in limited time, and L is greater than 1, shows too much for subsequent use; CGS prescribes a time limit under regulating for subsequent use being less than, and L is less than 1, shows deficiency for subsequent use; L departs from larger, then index is poorer, surplus for subsequent use or deficiency more serious.
(4) power grid security monitors index calculate: operation of power networks risk is real-time generation schedule and closed-loop control first concern problem thereof, and described power grid security monitors that index intuitively reflects the safe operation of grid equipment and the distribution situation of equipment trend;
Power grid security monitors that index calculate formula is as follows:
S＝A
m*n×100％ (5)
In formula, A is the constant truth of a matter of exponential function, 0<A<1, m is equipment heavy duty rate, n is the weight accumulated value of heavy duty and out-of-limit equipment, and be defined as: n=heave-load device number+Q × out-of-limit number of devices, Q is weight regulating parameter, get the integer being greater than 1, emphasize that equipment is out-of-limit even more serious than case of heavy load by setting Q value;
S is less, show power grid heavy-load and out-of-limit equipment more, monitor index poorer; S value is larger, shows that index is more excellent; When p or q is 0, S gets maximal value 1, shows that now electrical network is without heavy duty and out-of-limit equipment;
(5) real-time generation schedule closed-loop control depth factor index calculate: real-time generation schedule closed-loop control depth factor is for weighing in real-time generation schedule and AGC closed-loop control degree and operation of power networks real-time generation schedule to the support degree of AGC; In general, keep the CGS cluster unit of zone of reasonableness in operation of power networks, AGC control effects is better, and real-time generation schedule closed-loop control superiority is also more obvious.
Closed-loop control depth factor index Y computing formula is as follows:
Y＝C
(100-x)*(100-z)×100％ (6)
In formula, C is the constant truth of a matter of exponential function, and 0<C<1, x are SGS cluster unit number of units accounting, and z is SGS cluster unit capacity accounting, and when C value is less, Y attenuation trend is more obvious;
When system closed loop degree is higher, extreme case is that whole unit all belongs to SGS cluster, and x, z are 1, then Y value is 1; When system closed loop degree is lower, extreme case is that whole unit all belongs to CGS cluster, and x, z are 0, then Y value is tending towards 0.
Issue passage according to AGC On-line Control information, real-time generation schedule unit allocation parameter and plan real-time generation schedule to be dispatched unit and be divided into the large cluster of CGS, SGS, MGS tri-, for the optimum dynamic transfer of pondage, unit allocation pattern between the different cluster of real-time generation schedule closed-loop control and analysis and assessment provide computer-assisted classification foundation; Propose real-time generation schedule CGS and regulate standby requirement index and computing method, according to ultra-short term system loading predicted data, unit is actual exerts oneself, AGC On-line Control information data, consider prediction load, predicated error, reliability factor, and according to the frequency modulation resource requirement of following load variations trend quantum chemical method AGC under different operation of power networks operating mode; The real-time generation schedule proposed based on nonlinear exponent function regulates adequacy indexes for subsequent use and computing method, and this index reflection closed-loop control result of calculation rationality and following electrical network regulate abundant resource situation; The power grid security proposed based on nonlinear exponent function monitors index and computing method, the reflection safe operation of grid equipment of this index and the distribution situation of equipment trend; Propose based on the real-time generation schedule closed-loop control depth factor index of nonlinear exponent function and computing method, to weigh in real-time generation schedule and AGC closed-loop control degree and operation of power networks real-time generation schedule to the support degree of AGC.
The present invention has obtained pilot application in certain provincial power network real-time generation schedule and closed-loop control system thereof.Real-time generation schedule of the present invention and closed-loop control appraisal procedure thereof provide quantitative basis for the optimization of real-time generation schedule strategy of on-line, by scientific evaluation closed-loop control effect, on-line analysis genset also feeds back in time to the tracking situation of plan in real time, define more effective Closed-loop Control Strategy, improve reply electrical network real time execution risk ability.Also change dispatcher to arrange a large amount of unit according to operating experience in the past and participate in bias in the power grid and control to cause generation schedule can not obtain executive problem very well simultaneously, thus improve the implementation rate of plan, greatly reduce management and running personnel manual intervention and a large amount of unit frequently regulates situation repeatedly, improve serviceable life and the economy of power plant benefit of genset.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (5)
1. real-time generation schedule and a closed-loop control analysis and assessment method thereof, is characterized in that, comprise step:
(1) real-time generation schedule and closed-loop control unit cluster classification thereof: issue passage according to AGC On-line Control information, real-time generation schedule unit allocation parameter and plan and real-time generation schedule is dispatched unit be divided into three major types: follow the tracks of ACE unit cluster (CPS Generator Set, CGS) plan unit cluster (Schedule Generator Set, is followed the tracks of, and artificial mode unit cluster (Manual Generator Set, MGS) SGS); Wherein, CGS is the unit set participating in ACE adjustment in AGC unit; SGS is the unit set following the tracks of planned value; MGS is that power plant dispatches unit set voluntarily;
(2) real-time generation schedule is followed the tracks of ACE unit cluster CGS and is regulated standby requirement to calculate: actually to exert oneself according to the prediction of ultra-short term system loading, unit, AGC On-line Control information, consider the predicated error of system loading, wave characteristic factor simultaneously, calculate CGS and regulate standby requirement;
CGS upper adjustment standby requirement computing formula is:
Standby requirement computing formula is regulated to be under CGS:
In formula, i is unit subscript, and t is moment subscript, R
u,twith R
d,tbe respectively the upper and lower adjustment standby requirement of CGS of t, R
bfor CGS regulates base value for subsequent use, L
tfor the prediction of t system loading, L
t+1for the prediction of t+1 moment system loading, P
i,tfor t does not belong to, the unit of CGS cluster is meritorious exerts oneself, P
i, t+1for the t+1 moment does not belong to, the unit of CGS cluster is meritorious exerts oneself, δ
u, δ
dbe respectively the power network fluctuation correction factor that the upper and lower adjustment of CGS is for subsequent use;
(3) calculate real-time generation schedule CGS and regulate adequacy indexes for subsequent use: the upper adjustment of CGS adequacy indexes computing formula for subsequent use is:
Adequacy indexes computing formula for subsequent use is regulated to be under CGS:
In formula, the upper and lower adjustment that U and D is respectively CGS cluster t is for subsequent use, and K is the constant truth of a matter of exponential function, 0<K<1, U
maxwith U
minthe CGS calculated according to step (2) being respectively t regulates the upper limit for subsequent use and lower limit, D
maxwith D
minthe upper limit for subsequent use and lower limit is regulated under being respectively the CGS calculated according to step (2) of t;
(4) power grid security monitors index calculate: power grid security monitors that index calculate formula is as follows:
S＝A
m*n×100％ (5)
In formula, A is the constant truth of a matter of exponential function, 0<A<1, m is equipment heavy duty rate, n is the weight accumulated value of heavy duty and out-of-limit equipment, and be defined as: n=heave-load device number+Q × out-of-limit number of devices, Q is weight regulating parameter, get the integer being greater than 1, emphasize that equipment is out-of-limit even more serious than case of heavy load by setting Q value;
(5) real-time generation schedule closed-loop control depth factor index calculate: closed-loop control depth factor index Y computing formula is as follows:
Y＝C
(100-x)*(100-z)×100％ (6)
In formula, C is the constant truth of a matter of exponential function, and 0<C<1, x are SGS cluster unit number of units accounting, and z is SGS cluster unit capacity accounting, and when C value is less, Y attenuation trend is more obvious.
2. a kind of real-time generation schedule according to claim 1 and closed-loop control analysis and assessment method thereof, is characterized in that: in step (2), comprises two component: the R in left and right on the right side of described closed loop adjustment standby requirement computing formula equal sign
bvalue is with reference to the control criterion requirement of AGC; The right component is network load variation tendency component, by in load variations amount, the generating that deduction SGS, MGS unit cluster is born is gained merit incremental portion, all the other are CGS clustered control link needs the generating born to gain merit incremental portion, according to electrical network actual fluctuation situation adjustment power network fluctuation correction factor, realize climbing peak stage CGS at load and raise spare space more greatly, otherwise regulate spare space larger under the stage CGS of load landslide; δ
u, δ
dspan is respectively 0.95< δ
u<1.05,0.95< δ
d<1.05.
3. a kind of real-time generation schedule according to claim 1 and closed-loop control analysis and assessment method thereof, it is characterized in that: in described step (3), when CGS regulates standby requirement between adjustment standby requirement upper and lower bound, regulate adequacy indexes L value for subsequent use to be 100%, show for subsequent use satisfying the demands; CGS regulates for subsequent use being greater than in limited time, and L is greater than 1, shows too much for subsequent use; CGS prescribes a time limit under regulating for subsequent use being less than, and L is less than 1, shows deficiency for subsequent use; L departs from larger, then index is poorer, surplus for subsequent use or deficiency more serious.
4. a kind of real-time generation schedule according to claim 1 and closed-loop control analysis and assessment method thereof, is characterized in that: in described step (4), S is less, show power grid heavy-load and out-of-limit equipment more, monitor index poorer; S value is larger, shows that index is more excellent; When p or q is 0, S gets maximal value 1, shows that now electrical network is without heavy duty and out-of-limit equipment.
5. a kind of real-time generation schedule according to claim 1 and closed-loop control analysis and assessment method thereof, it is characterized in that: in described step (5), when system closed loop degree is higher, extreme case is that whole unit all belongs to SGS cluster, x, z are 1, then Y value is 1; When system closed loop degree is lower, extreme case is that whole unit all belongs to CGS cluster, and x, z are 0, then Y value is tending towards 0.
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