CN104299055A - Power generation plan optimizing method for restraining unit reverse regulation in power plant - Google Patents

Power generation plan optimizing method for restraining unit reverse regulation in power plant Download PDF

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Publication number
CN104299055A
CN104299055A CN201410547364.1A CN201410547364A CN104299055A CN 104299055 A CN104299055 A CN 104299055A CN 201410547364 A CN201410547364 A CN 201410547364A CN 104299055 A CN104299055 A CN 104299055A
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unit
power plant
plan
oneself
oppositely
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CN104299055B (en
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张彦涛
丁恰
涂孟夫
高宗和
戴则梅
吴炳祥
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Nari Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Electricity, gas or water supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention discloses a power generation plan optimizing method for restraining unit reverse regulation in a power plant. On the basis of day-ahead and real-time power generation planning input and output data, the data include system loads, new energy prediction, an overhauling plan, section limit, unit shutdown information, a unit reference plan and information of unit sensitivity to monitoring elements, in comprehensive consideration of various restraints such as the system balance restraint, the unit operation restraint, the network security restraint and the unit group restraint, the mapping relation between a unit and the power plant is maintained on the basis of a common optimizing model, and a unit reverse regulation restraint in the power plant is introduced to form a mathematical model of the unit reverse regulation restraint in the power plant. A more reliable, effective and practical unit output plan is achieved, the execution level of the unit plan is increased, the closed-loop levels of day-ahead and real-time plans and AGC are increased, the power generation optimizing method is beneficial to increasing the intelligentization level of day-ahead and real-time power generation plan dispatching and improving the decision-making capacity, and the increasingly-lean safe operation requirement of a large power grid is met.

Description

A kind of generation schedule optimization method suppressing unit in power plant oppositely to regulate
Technical field
The invention belongs to dispatching automation of electric power systems technical field, relate to a kind of generation schedule optimization method suppressing unit in power plant oppositely to regulate.
Background technology
Current, prevalence is at home built with intelligent grid, according to need for electricity prediction next day, consider the various constraint conditions such as system balancing constraint, unit operation constraint, operation of power networks constraint, Network Security Constraints, the practical function of the generation schedule a few days ago degree optimizing establishment 96 Unit Combination plans next day and the plan of exerting oneself improves comprehensively.
Planning in practical implementation a few days ago, due to system loading prediction a few days ago and new forms of energy prediction a few days ago and physical presence relatively large deviation, causing the plan of a few days ago exerting oneself significantly to adjust, regulating to AGC unit and bring immense pressure, also reduce power grid security index simultaneously.For head it off, real-time generation schedule establishment is brought into schedule, real-time generation schedule programmed function is according to the change of up-to-date power system operating mode, operating states of the units change, super short period load demand forecast, the prediction of ultra-short term new forms of energy, in real time section limit and powered plan, reference generation schedule a few days ago, works out the unit generation plan of following multiple period.Real-Time Scheduling plan with plan identical a few days ago, support energy-saving distribution, electricity market, three public scheduling, 3 kinds of scheduling methods.Real-time plan period interval is 5 minutes (or 15 minutes), and the time range of planning is following 1 to a few hours.Planning on the fixed basis of Unit Combination state a few days ago, real-time plan can be exerted oneself plan by cycle rolling amendment unit a few days ago, but Unit Combination state is not adjusted, namely Unit Economic scheduling feature is only included, do not comprise Unit Combination function, in planning, consider transmission cross-section security constraint, specify transmission of electricity element security constraint.
The accuracy of real-time planning basic data is high, ultra-short term predicted data and real data deviation very little, plan implementation rate of exerting oneself increases substantially, while AGC eases off the pressure, more can the security of accurate evaluation 1 to a few hours of future operation of power networks.But after plan a few days ago and real-time generation schedule and AGC closed loop, plan a few days ago obtains embodying more intuitively by AGC with the quality of real-time planning result.In such as power plant, unit oppositely regulates problem, and at synchronization, be under the jurisdiction of two units of same power plant, a unit output adjusts, adjust under a unit output, upper adjustment amount of exerting oneself equals lower adjustment amount of exerting oneself, and for power plant, exerts oneself and does not adjust.Therefore, if a few days ago and in real time plan do not consider the constraint that in power plant, unit oppositely regulates, just may appear at the situation that in the same power plant of synchronization, unit output adjustment direction is inconsistent in establishment result.This kind of situation, that power plant does not wish to see, do not meet power plant's actual motion requirement, therefore, a few days ago and in real time planning optimization model need introduce the constrained that in power plant, unit oppositely regulates, make the more realistic operation demand of plan of exerting oneself worked out, improve a few days ago and the closed loop level of in real time plan and AGC.
Summary of the invention
For overcoming the deficiency in prior art, the object of the invention is to be to provide a kind of generation schedule optimization method suppressing unit in power plant oppositely to regulate, the optimized mathematical model of constraint is oppositely regulated by introducing unit in power plant, develop the unit output plan of more realistic service requirement, promote unit plan executive level, better meet the demand of power plant and user.
For achieving the above object, technical scheme of the present invention is as follows:
Suppress the generation schedule optimization method that unit in power plant oppositely regulates, it comprises the following steps:
(1) data maintenance instrument is provided, safeguards the mapping relations between unit and power plant;
(2) obtain up-to-date electrical network physical model and real-time mode data, start Calculation of Sensitivity and obtain monitoring that element is to unit sensitivity information;
(3) data such as the sensitivity results information that the mapping relations between reading system load prediction, new forms of energy prediction, turnaround plan, section limit, compressor emergency shutdown information, interconnection plan, unit is adjustable exerts oneself, Unit Economic parameter information, unit reference plan, described step (1) are safeguarded unit and power plant and affiliated step (2) calculate;
(4) according to all input data of described step (3), on the basis of conventional SCUC and SCED Optimized model, introduce unit in power plant and oppositely regulate constraint, form the Optimized model considering that in power plant, unit oppositely regulates;
In electric system actual motion, it is desirable to see that the unit of same power plant is identical at synchronization adjustment direction of exerting oneself, do not wish to exist part of generating units and to exert oneself upper adjustment, part of generating units is exerted oneself the situation of lower adjustment.For head it off, first introduce power plant and to exert oneself the concept of adjustment direction, adjacent 2 adjustment direction of exerting oneself of adjustment direction power plant be exactly power plant exerts oneself, always power plant exerts oneself and equals power plant and have unit output under its command and add.Then, introduce adjacent 2 unit output adjustment direction and power plant to exert oneself the relation of adjustment direction:
Σ i ∈ L q h i , t + ≤ l q , t + R q
Σ i ∈ L q h i , t - ≤ l q , t - R q
Σ i ∈ L q h i , t + ≥ l q , t +
Σ i ∈ L q h i , t - ≥ l q , t -
Wherein: be 0/1 variable, power plant q to exert oneself rise integral denotation at moment t, be 0/1 variable, power plant q to exert oneself downward integral denotation at moment t, L qfor power plant q has the set of unit composition under its command, R qfor unit number in power plant q.
Above-mentioned constraint expression formula associates adjacent time interval unit output adjustment direction and power plant adjustment direction of exerting oneself, and when existence unit adjusts, then power plant exerts oneself upper adjustment, and when adjusting under existence unit, power plant exerts oneself upper adjustment; Vice versa, when upper adjustment is exerted oneself by power plant, then at least exists on a unit and adjust, and when lower adjustment is exerted oneself by power plant, then adjusts under at least there is a unit.
For a power plant, adjacent 2 adjustment of exerting oneself only have a direction, therefore, need meet the unique constraints of power plant's adjustment direction:
l q , t + + l q , t - ≤ 1
This constraint, together with above-mentioned constraint, makes power plant have adjacent 2 adjustment direction of exerting oneself of unit synchronization under its command identical.
(5) starting guide calculates, Output rusults information.
Beneficial effect of the present invention is as follows:
(1) in power plant, unit oppositely regulates constraint, considers unit output adjustment direction in the same power plant of synchronization while realizing the plan of establishment unit output, avoids the situation that in the same power plant of synchronization, unit output adjustment direction is inconsistent to occur.
(2) improve the practical level of unit output plan, for AGC provides the plan of exerting oneself more meeting power plant's actual motion characteristic, improve a few days ago and plan the operation with closed ring level with AGC in real time.
The invention has the beneficial effects as follows and carry out on basis at existing Optimized model, introduce unit in power plant and oppositely regulate constraint, improve the practical level optimizing the plan of establishment unit, for AGC provides the plan of exerting oneself more meeting power plant's actual motion characteristic, improve a few days ago and plan the operation with closed ring level with AGC in real time.
Modeling method of the present invention has low, the adaptable feature of calculating strength, and the scheduling institution being adapted at the various rank of China is applied.
Accompanying drawing explanation
The generation schedule optimization method process flow diagram that Fig. 1 suppresses unit in power plant oppositely to regulate.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
See Fig. 1, the present invention is the physical model statistic property based on electrical network, economic model parameter, network topology data, load prediction data, wind power prediction data, Unit Combination status data, the mapping relations etc. of unit and power plant, on the basis of optimization routine model, introduce unit in power plant and oppositely regulate constraint, develop the unit output plan of more realistic service requirement, promote a few days ago with the unit plan executive level of real-time planning, ensure electric power netting safe running.
Therefore, the present invention proposes a kind of effective ways improving the practical level of unit plan, mainly address the problem:
In actual motion, what power plant paid close attention to is the adjustment direction of exerting oneself of whole power plant, and the adjustment of exerting oneself of whole power plant is dispensed to each unit, and therefore, the adjustment direction of each unit is identical.But, there is the situation that in the same power plant of synchronization, unit output adjustment direction is contrary a few days ago and in real-time planning result, power plant adjusts always to add to each unit and is greater than power plant and exerts oneself adjustment amount, adds power plant's workload, does not meet power plant's actual motion characteristic.
Therefore, planning oppositely to regulate unit in the same power plant of constrained synchronization oppositely to regulate by introducing unit in power plant a few days ago and in real time, improving the practical level of planning, better meeting the requirement of power plant and user.
The present invention suppresses the generation schedule optimization method that in power plant, unit oppositely regulates, and here is the specific embodiment of the present invention, comprising:
(1) data maintenance instrument is provided, safeguards and revise the mapping between unit and power plant;
(2) obtain up-to-date electrical network physical model and real-time mode data, start Calculation of Sensitivity and obtain monitoring that element is to unit sensitivity information;
(3) data of the sensitivity results information that the mapping relations between reading system load prediction, new forms of energy prediction, turnaround plan, section limit, compressor emergency shutdown information, interconnection plan, unit is adjustable exerts oneself, Unit Economic parameter information, unit reference plan, described step (1) are safeguarded unit and power plant and affiliated step (2) calculate.
(4) according to all input data of described step (3), on the basis of existing conventional SCUC and SCED Optimized model, introduce unit in power plant and oppositely regulate constraint, form unit in introducing power plant and oppositely regulate the optimized mathematical model of constraint.
(5) starting guide calculates, and Output rusults information, by solving the optimized mathematical model that unit in power plant oppositely regulates.
Practical application effect
The technical program is applied at some regional power grid and provincial power network, and effect meets expection.Practical application shows, the present invention in conjunction with power plant's actual motion characteristic, can work out the unit output plan that more reliable and effective degree of being practical is higher, promotes unit plan executive level, reduce the workload that power plant is unnecessary, better meet the requirement of power plant and user.
The present invention is to work out based on inputoutput data with real-time generation schedule a few days ago, comprise system loading, new forms of energy are predicted, turnaround plan, section limit, compressor emergency shutdown information, unit reference plan and unit are to supervision element sensitivity information, consider all kinds of constraint, comprise system balancing constraint, unit operation retrains, Network Security Constraints and machine group constraint etc., on this optimization routine model basis, consider all kinds of operation of power networks constraint, introduce unit in power plant simultaneously and oppositely regulate constraint, say in a sense, it is the once correction to the plan of conventional model unit, revised unit output plan is made more to meet the requirement of power plant's actual motion, contribute to improving intelligent level and the decision-making capability of plan and real-time power generation dispatching a few days ago.Meanwhile, this modeling method has low, the adaptable feature of calculating strength, and the scheduling institution being more adapted at the various scale of China is applied, and meets the bulk power grid safe operation demand of lean day by day.
The present invention is described herein according to specific exemplary case study on implementation.Suitable replacement is not carried out or amendment is apparent under not departing from the scope of the invention to one skilled in the art.Exemplary case study on implementation is only illustrative, instead of the restriction to scope of the present invention, and scope of the present invention is defined by affiliated claim.

Claims (4)

1. the generation schedule optimization method suppressing unit in power plant oppositely to regulate, is characterized in that, comprise the following steps:
(1) data maintenance instrument is provided, safeguards the mapping relations between unit and power plant;
(2) obtain up-to-date electrical network physical model and real-time mode data, start Calculation of Sensitivity and obtain monitoring that element is to unit sensitivity information;
(3) data of the sensitivity results information that the mapping relations between reading system load prediction, new forms of energy prediction, turnaround plan, section limit, compressor emergency shutdown information, interconnection plan, unit is adjustable exerts oneself, Unit Economic parameter information, unit reference plan, described step (1) are safeguarded unit and power plant and described step (2) calculate;
(4) according to all input data of described step (3), on the basis of conventional SCUC and SCED Optimized model, introduce unit in power plant and oppositely regulate constraint, formed and introduce the optimized mathematical model that in power plant, unit oppositely regulates;
(5) starting guide calculates, Output rusults information; Being optimized calculating by solving the optimized mathematical model that in introducing power plant, unit oppositely regulates, exporting and optimizing result of calculation.
2. a kind of generation schedule optimization method suppressing unit in power plant oppositely to regulate according to claim 1, it is characterized in that, in described step (4), in power plant, unit oppositely regulates constraint, forms the modeling method introducing the optimized mathematical model that unit oppositely regulates in power plant as follows:
First, introduce power plant and to exert oneself adjustment direction, adjacent 2 adjustment direction of exerting oneself of adjustment direction power plant be exactly power plant exerts oneself, always power plant exerts oneself and equals power plant and have unit output under its command and add;
Then, introduce adjacent 2 unit output adjustment direction and power plant and to exert oneself the relation of adjustment direction, form constraint expression formula as follows:
Σ i ∈ L q h i , t + ≤ l q , t + R q
Σ i ∈ L q h i , t - ≤ l q , t - R q
Σ i ∈ L q h i , t + ≥ l q , t +
Σ i ∈ L q h i , t - ≥ l q , t -
Wherein: be 0/1 variable, power plant q to exert oneself rise integral denotation at moment t, be 0/1 variable, power plant q to exert oneself downward integral denotation at moment t, L qfor power plant q has the set of unit composition under its command, R qfor unit number in power plant q.
3. a kind of generation schedule optimization method suppressing unit in power plant oppositely to regulate according to claim 2, it is characterized in that, above-mentioned constraint expression formula associates adjacent time interval unit output adjustment direction and power plant adjustment direction of exerting oneself, when existence unit adjusts, then power plant exerts oneself upper adjustment, when adjusting under existence unit, power plant exerts oneself upper adjustment; Vice versa, when upper adjustment is exerted oneself by power plant, then at least exists on a unit and adjust, and when lower adjustment is exerted oneself by power plant, then adjusts under at least there is a unit.
4. a kind of generation schedule optimization method suppressing unit in power plant oppositely to regulate according to Claims 2 or 3, it is characterized in that, for a power plant, adjacent 2 adjustment of exerting oneself have a direction, therefore, the unique constraints relational expression that need meet power plant's adjustment direction is:
l q , t + + l q , t - ≤ 1
According to this restriction relation formula and above-mentioned constraint expression formula, power plant is made to have adjacent 2 adjustment direction of exerting oneself of unit synchronization under its command identical.
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