CN101917024A - Generating method of universality cost space in security-constrained dispatch - Google Patents
Generating method of universality cost space in security-constrained dispatch Download PDFInfo
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Abstract
The invention relates to a generating method of a universality cost space when an electric grid dispatching mechanism draws up generation plans meeting various security constraints, and provides a 'sequence cost space' construction method required by an optimization algorithm, including information of a generation dispatching loading sequence, a constraint adjustment sequence, and the like by summarizing production rules of dispatch and combining an electric power market with an economics theory of energy-saving dispatch. Cost management is cooperated in the process of solving security-constrained economic dispatch, such that the optimization algorithm can universally meet requirements on various generating modes of just, fair and open dispatch, energy-saving dispatch, cost dispatch, electric power market, and the like, and a new solving way is provided for realizing generation resource optimum distribution and large electric grid security constraint, reducing loss of the electric grid and further improving electric transmission and transformation resource. The invention provides a time-saving, labor-saving and universal cost space generation method without needing of carrying out complex mold construction and solution according to the particular case in the security-constrained dispatch.
Description
Technical field
The present invention relates to dispatching of power netwoks mechanism and satisfy the generation method in a kind of universality cost space in the generation schedule process of all kinds of security constraints in establishment.
Background technology
Since the middle and later periods eighties in last century, along with going deep into of electric power diversified investment, in order to guarantee the legal economic interests of each investment subject, the establishment of generation schedule is scheduling to principle with " three public affairs ".The target of " three public affairs " scheduling is when guaranteeing electric power netting safe running, makes the utilization of similar unit in various planning cycles hour suitable substantially.This way has promoted the power industry fast development over a period to come, but has also caused the big fired power generating unit generating capacity of high-efficiency environment friendly to play one's part to the full, and the little fired power generating unit of high pollution, high energy consumption but can multiple electric situation.
Along with power system reform deeply and the variation of international finance, energy general layout, generation schedule proposed the requirement of dispatching again according to electricity market rule or energy-saving distribution principle.Simultaneously, the expansion of the application of novel technology of transmission of electricity and electric power system scale, make the target and the constraint of generation schedule establishment also become increasingly complex, tradition more and more can't adapt to the requirement of production practices based on the generation schedule form of presentation of artificial establishment, therefore need utilize rigorous, general Mathematical Planning software kit is developed the security-constrained dispatch software that a cover satisfies various constraintss, the pattern that realizes the generation schedule establishment changes to the mode towards constraint from the mode towards curve, by improving the intelligent level of planning, adapt to electricity market, energy-saving distribution, " three public affairs " scheduling is to the requirement of generation schedule establishment.
Security-constrained dispatch is the core technology that power system dispatching mechanism is applied in the generation schedule management, comprised security constraint unit combination (Security-Constrained Unit Commitment, be called for short SCUC) and security constraint economic dispatch (Security-Constrained Economic Dispatch is called for short SCED) two aspect contents.The target that the generation schedule management of scheduling mechanism realizes is: under the prerequisite that satisfies various networks and unit operation parameter, consider the requirement of all kinds of economy, energy-saving and environmental protection policy, the hair electric equilibrium of assurance system, thus realize power grid security, stable, high-quality operation.Analyze theoretically, security-constrained dispatch be one extensive, non-linear, the time become, the MIXED INTEGER optimization problem, must make up rational mathematical model by to producing the analysis of reality, be achieved by the Mathematical Planning bag then.
The target of electricity market is the social benefit maximization, purchases electric cost minimization exactly corresponding to generating side market.Its target function is as follows:
Wherein: C
I, t(p
I, t) refer to the electric cost of purchasing at t period i platform unit output place.
Under this target function, system also will satisfy following constraints:
1) day part unit output summation and aggregate demand are exerted oneself to the constraint of balance;
2) the system boot situation satisfies standby requirement;
3) each unit output remains on the constraint between exerting oneself of its technology maximum output and technology minimum;
4) lifting of each unit slope speed satisfies the machine unit characteristic requirement;
5) each branch road trend of network remains on the constraint in the normal limit scope;
6) each section tidal current of network remains on the constraint in the normal limit scope;
7) other constraints.
C in the target function
I, t(p
I, t) use following formulate
Here C
I, baseRefer to that unit is at p
I, tGo out the basic cost in force;
Refer to that unit is at p
I, tGo out the variable cost in force; k
lBe illustrated in p
I, tGo out the limit quotation in force.
M is total hop count of segmentation straight line.
Therefore under electricity market, a monotonically increasing offer curve must be declared out at each period of its every unit by each power plant, characterizes the mapping relations of exerting oneself with cost.After electricity market went out clearly, the price that each unit goes out on the capacity clearly all was the same, is called market clearing price.
Under the idealized model of energy-saving distribution, every generating set all has a little curve that increases of consumption, is used to be characterized in respectively go out the coal consumption amount that the every increase unit output in force need increase.As long as with the k in the formula (1)
lUse p
I, tGo out little just increase to substitute of the consumption in force and can be directly the pattern of planning be transformed into the energy-saving distribution pattern from mode of power market.The energy-saving distribution pattern, little increasing all equates the consumption of day part unit.
The realization of " three public affairs " regulation goal is the process of an electric energy control in essence, and the generation schedule establishment is the process of an electric power control.The electric energy control process can be brought the relevant constraint of a lot of sequential, many units or machine group is set in the electric weight constraint of certain period such as needs, and relation between the different electric weight constraints or the like is set.Do that like this computational efficiency is sharply reduced, can't satisfy the time requirement of practicability.Therefore, major part is to adopt the method for the various artificial establishments of computer simulation to carry out planning in the application in practice at home.But this method has limited the adaptability of security-constrained dispatch to various patterns such as electricity market, energy-saving distribution and " three public affairs " scheduling again, carries out software development under different patterns again, has improved the cost of exploitation, training, maintenance and application.
Summary of the invention
The objective of the invention is to overcome weak point of the prior art, proposed by summary the power scheduling rule, economic theory in conjunction with electricity market and desirable energy-saving distribution, make up the needed cost space of Mathematical Planning, make the security-constrained dispatch function under different operation systems, have the thought of versatility, and utilize this thought to propose and realized under a kind of " three public affairs " scheduling system, according to the unit operation characteristic of all kinds of power supplys and the rule of in the generation schedule establishment, exerting oneself and loading thereof, generate the method for the needed cost space of Mathematical Planning.
The present invention is achieved through the following channels:
The generation method in universality cost space in the security-constrained dispatch comprises following key step:
A kind of parameter setting apparatus is provided, is used for being provided with their preface cost distribution space according to dissimilar power supply power generation dispatching rules and all kinds of unit operation characteristic;
A kind of data fetch device is provided, is used to read and the relevant master data of cost space establishment, comprising: unit parameter, operation constraint etc.;
A kind of data calibration device is provided, it receives the master data in parameter and the data fetch device of being provided with in parameter setting apparatus, and, parameter and master data carry out logic determines to being set, the inconsistent master data that parameter and correspondence are set is fed back in parameter setting apparatus and the data fetch device, again receive and read, up to logic determines both sides data fit condition;
Load all kinds of power supplys in proper order according to following rule:
1, under " three public affairs " scheduling, can load unit output according to the order of firm output unit, regenerative resource (wind-powered electricity generation etc.), water power, thermoelectricity; Dry season based on hydroelectric peak, wet season based on the thermoelectricity peak regulation, under energy-saving distribution, can load unit output in proper order according to the generating of statutory regulation;
2, fired power generating unit is exerted oneself according to the needs order loading from high in the end of load factor; Each fired power generating unit according to de-oiling Wen Ran exert oneself, minimum technology is exerted oneself, normally lowly exert oneself, order that maximum technology is exerted oneself loads and exerts oneself; Hydropower Unit is divided into scalable (week regulate and more than) and unadjustable water power two big classes, and the uncontrollable scalable water power that has precedence over generates electricity; The LNG unit is determined the peaking operation mode as required;
3, the preface cost of exerting oneself according to each fired power generating unit expectation of The Theory Construction of marginal electricity price;
The loading rule of exerting oneself in the planning process according to above-mentioned data that provide and all kinds of power supplys, exerting oneself of each generating set exerted oneself and be divided into plurality of sections from the 0 maximum technology of exerting oneself, and be that each section set its preface value at cost, formed a kind of cost space that can be used for security-constrained dispatch.
Security-constrained dispatch is the core content of scheduling mechanism generation schedule establishment a few days ago.At present, the policy system of generation schedule establishment a few days ago mainly contains three kinds of patterns such as energy-saving distribution, electricity market and " three public affairs " scheduling.Under energy-saving distribution and electricity market, the unit cost of generation schedule establishment a few days ago is respectively the little generating quotation cost that increases cost and power plant of consumption of coal.
Ji Hua no constraint plan a few days ago is actually the scheduling processes of exerting oneself of an optimum order, this preface must be stated as the described cost expression way of this paper background technology from the security-constrained dispatch angle, meet a series of requirements of " three public affairs " scheduling with the generation schedule that drives the security-constrained dispatch generation.This cost that obtains according to ordering is called the preface cost.These two kinds of costs can be used following formulate:
C(x)＝Δa(x)×x+b
When unit output took x to, its cost C (x) was made up of basic cost b and variable cost Δ a (x) * x two parts.Wherein x is exerted oneself by its initial maximum technology of exerting oneself and is divided into plurality of sections, can represent with x (i), and i represents that x is in i section; Δ a (x) can state a[x (i)-a[x (i-1) as], just the x cost of electricity-generating that is in the i section deducts the cost of electricity-generating that x is in the i-1 section.
The target function of security-constrained dispatch is min ∑ C (x), even all optimize the total cost minimum of object.Exerting oneself of each unit is to load up according to its C (x) order from small to large.Therefore the cost factor a[x (i) in the target function] and b be the exert oneself central factor of loading of drive train.All unit generation costs can be formed a cost space of being made up of time dimension, unit peacekeeping capacity dimension.The cost curve of each unit day part has the dull characteristic that rises in this space.These characteristics also are the requirements of finding the solution the Mathematical Planning software kit of security-constrained dispatch target function.
Under the energy-saving distribution system, the little curve that increases of the consumption of unit can obtain by test; Under the power market, the cost of exerting oneself of unit can be declared acquisition automatically by power plant.Under " three public affairs " scheduling system, there is not so cost space that satisfies the security-constrained dispatch characteristic.
In the Power Market, after the market clearing, the price that each unit goes out on the capacity clearly all is the same, is called market clearing price; In the energy-saving distribution environment, little increasing all equates the consumption of day part unit; In " three public affairs " dispatch environment, the preface cost that the day part fired power generating unit goes out the force correspondence is all consistent.
The problem that the present invention solves has at first proposed a kind of by the summary to the power scheduling rule, economic theory in conjunction with electricity market and desirable energy-saving distribution, make up the needed cost space of Mathematical Planning, make the security-constrained dispatch function under different operation systems, have the thought of versatility.And utilize this thought to propose and realized under a kind of " three public affairs " scheduling system, requirement according to the described Mathematical Modeling of the formula in the background technology (1), make up a method that satisfies the cost space of security-constrained dispatch characteristic, make the Mathematical Modeling of formula (1) go for various scheduling methods.
Like this under " three public affairs " scheduling method according to the operation characteristic of dissimilar power supplys, go out the force with the steady burning-point of the de-oiling of fired power generating unit, minimum technology, normal minimum goes out service capacity point, normal maximum output point under force, the expectation electric weight, exceeds construction cost space, force, and drive this optimization Mathematical Modeling and calculate.Under mode of power market, the segmentation offer curve of each unit can be used to drive this optimization Mathematical Modeling and calculate; Under the pattern of little enhancement row energy-saving power generation dispatching, the little curve that increases of the segmentation coal consumption of each unit can be used to drive this optimization Mathematical Modeling and calculate according to consumption.
Finding the solution of big power grid security constraint economic dispatch is to be divided into model modeling and to call optimized Algorithm and find the solution two major parts and form, and optimization aim is that the driving by cost space is achieved.By finding to the analysis of dispatching of power netwoks pattern, moving law with to the research of optimized Algorithm, the structure of cost space can be got involved in whole modeling and the solution procedure on one's own initiative, reduces the difficulty of finding the solution of big power grid security constraint economic dispatch under the prerequisite that guarantees the property optimized greatly.
Like this, by the summary of production law to scheduling, economic theory in conjunction with electricity market and energy-saving distribution, it is needed to have proposed a kind of optimized Algorithm, comprised power generation dispatching load loading sequence, " preface cost space " construction method of sequential scheduling information is adjusted in constraint, cost management is collaborative in the process of finding the solution the security constraint economic dispatch, make optimized Algorithm can adapt to " three public affairs " scheduling with versatility, energy-saving distribution, the cost scheduling, the needs of multiple power generation mode such as electricity market are for realizing the generating most optimum distribution of resources, realize big power grid security constraint, reduce grid loss, further improve the power transmission and transformation resource a new solution route is provided.In security-constrained dispatch, need not to carry out as the case may be more complicated modeling and find the solution, the method for the invention provides a kind of and saved time, laborsaving, has the cost space generation method of versatility, and its invention meaning is:
1. the present invention states the electric weight constraint as the cost space mode effectively, by decomposition and the coordination that the extensive optimized dispatching problem of complexity is tieed up in space dimension, time dimension, constraint peacekeeping target, realized the decoupling zero of period constraint, with the linear problem of period problem reduction, make full use of the characteristics of mixed integer programming algorithm global optimizing, can effectively improve computational speed on the one hand, also make parallel computation become possibility on the other hand.
2. multi-objective coordinated optimisation strategy, need to solve under energy-saving power generation dispatching and the Power Market optimization to safety, energy-saving and environmental protection, economic dispatch integration objective, the invention provides a comprehensively cost space generation method of various factors, reach the purpose of multiple objective programming.In the building process in universality cost space, refinement capacity and cost segmentation reach the purpose of the plan availability that improves computational efficiency and establishment as required.
3. general cost management mode can change into " soft-constraint " with " hard constraint " in the conventional security constrained dispatch, has increased the space of congestion management in the security-constrained dispatch process, has improved the convergence that Mathematical Modeling is resolved.
4. the structure in universality cost space with electricity market and etc. little consistent monotonically increasing cost curve of energy-saving distribution that increases, built domestic and international advanced person's mixed integer programming scheme and produced the actual bridge that combines, can realize seamlessly transitting of multiple scheduling method (three public scheduling, electricity market, energy-saving and emission-reduction scheduling) with scheduling.
Rule based on all kinds of power supply loads of above-mentioned loading provides a kind of loading sequence for reference, can adjust as the case may be in practice.The reference sequence that loads all kinds of power supply loads is as follows:
1. the minimum de-oiling of thermoelectricity of starting shooting surely combustion is exerted oneself, and promptly the fired power generating unit for the start operation at first will run to the steady position of exerting oneself of firing of its de-oiling;
2. fixing operation unit output, for because of unit maintenance, disappearing lacks or other process technology limit need need be loaded into its firm output value earlier according to the unit of firm output operation;
3. the wind-powered electricity generation plan is exerted oneself, wind-powered electricity generation plan value of exerting oneself that prediction is calculated according to wind-force;
4. the cogeneration units plan is exerted oneself, by the recommended value of exerting oneself of cogeneration units according to the proposition of heat supply situation;
5. the water power plan is exerted oneself, and according to the regimen prediction, optimizes plan value of exerting oneself that each water power is determined in the back in conjunction with striding the basin;
6. the minimum technology of fired power generating unit is exerted oneself, on above basis with each fired power generating unit according to schedule load factor order from big to small be loaded into minimum technology and exert oneself;
7. the normal low technical of fired power generating unit is exerted oneself, on above basis with each fired power generating unit according to schedule load factor order from big to small be loaded into normal operation low technical value of exerting oneself;
8. LNG unit output, the peaking performance of LNG unit is relatively good, and low ebb is shut down generally speaking, and peak start operation;
9. the normal peak regulation of fired power generating unit is exerted oneself, and loads exerting oneself of each fired power generating unit according to each thermoelectricity plan load factor sequence alternate from big to small on above basis, arrives first expectation and exerts oneself, exert oneself to maximum radix again, and, up to the load needs that satisfy system;
10. water power exceed the power space, exceed power generating order according to water power, alternately exert oneself, up to the load needs that satisfy system from the peak regulation space that each water power plan is exerted oneself the maximum output.
For example: the loading sequence of all kinds of unit outputs can be described as in dispatching of power netwoks:
● thermoelectricity de-oiling Wen Ran exerts oneself;
● the plan of firm output unit is exerted oneself;
● wind-powered electricity generation is exerted oneself from 0 plan of being loaded into;
● the runoff water power is exerted oneself from 0 plan of being loaded into;
● can adjust water power and exert oneself from 0 plan of being loaded into according to downward modulation order backward;
● thermoelectricity is loaded into minimum technology from de-oiling Wen Ran respectively according to synthetic load rate order from high in the end and exerts oneself;
● thermoelectricity is exerted oneself from minimum radix respectively according to synthetic load rate order from high in the end and is loaded into normal low exerting oneself;
● thermoelectricity is expected to exert oneself from normally hanging down to exert oneself to be loaded into respectively according to synthetic load rate order from high in the end;
● thermoelectricity is loaded into maximum technology and exerts oneself from normal low exerting oneself respectively according to synthetic load rate order from high in the end;
● can adjust water power and exert oneself from plan according to the rise order and be loaded into maximum output.
Unit output unloading order is opposite with loading sequence.
When need raising unit output, system's generation network constraint raises according to above order; When need reducing unit output, system's generation network constraint reduces according to above order backward.
More than this unit output loading sequence can become a preface model.Under the electricity market or energy-saving distribution system of dual track system, can be according to rule, do not participate in market competition or the preface cost of energy-saving distribution unit according to above thought establishment, form another preface model.
Under same preface model, can adopt the mode of rank order or translocation sorting to carry out the establishment of preface cost for the preface cost of same class unit, form a kind of preface scheme.
In the generation schedule compilation process, can be according to the requirement of actual motion, the sorting position of the indivedual units of Iterim Change is drawn preface thereby form a batch total under same preface scheme.
In thermoelectricity preface cost compilation process, determine by preface cost that the expectation of each fired power generating unit is exerted oneself, formed from the normal low high output of exerting oneself according to the dull preface cost that rises of Different Slope, guarantee in the exert oneself marginal cost unanimity at place of expectation.
After finishing preface cost space establishment, can introduce the network loss factor, revise corresponding preface cost, make and can realize the minimized purpose of network loss in the generation schedule compilation process.
To all kinds of power supplys, different units carry out order exert oneself load the firm output unit that can weaken can't adjust drawback, tighten security the simultaneously effect of constrained dispatch self has reduced the intensity that the firm output unit has also just reduced artificial establishment, reaches the requirement of automation.
The preface cost space generation method of security-constrained dispatch of the present invention can further be specialized, and illustrates that at first the formation method of preface value at cost of all kinds of power supplys is specific as follows:
1, the preface value at cost formation method of thermoelectricity:
At first set plan electric weight, the electric weight load factor of each thermal power plant; With the total electric weight of the generating of thermoelectricity according to schedule the pro rata distribution of electric weight become the expectation electric weight to each power plant, and generate the expected load rate; The expected load rate is deducted the de-oiling Wen Ran corresponding load factor of exerting oneself, form and adjust the electric weight load factor; According to adjusting electric weight load factor rank order from high in the end, with its as exert oneself from de-oiling Wen Ran to minimum technology, minimum technology is exerted oneself and is normally lowly exerted oneself, the normal low order that the preface cost is worked out the maximum output of exerting oneself;
Secondly according to exerting oneself that the pro rata distribution day part fired power generating unit of each fired power generating unit expectation electric weight is born, obtain each fired power generating unit expectation value of exerting oneself at day part;
The 3rd utilizes the normally preface cost scope of the low maximum output of exerting oneself of fired power generating unit, makes up a relevant marginal preface cost of bearing with all fired power generating unit of total load curve linear, obtains day part thermoelectricity limit preface cost;
Utilize each fired power generating unit to exert oneself and the normal low preface of exerting oneself the normal low of day part at last, the line that expectation is exerted oneself and thermoelectricity limit preface cost forms makes up from the preface cost of the normal low maximum output of exerting oneself.
2, the preface value at cost formation method of water power:
Water power is divided into radial-flow type water power and can adjust water power is arranged.Give a preface cost of exerting oneself to adjusting exerting oneself of water power between radial-flow type water power and de-oiling Wen Ran from 0 plan of exerting oneself; Give a preface cost for the plan maximum output of exerting oneself greater than the thermoelectricity maximum output, with guarantee thermoelectricity complete load just to load in order after full can adjust water power and exert oneself, thermoelectricity high-fall behind the de-oiling Wen Ran just in order the reduction plan that can adjust water power exert oneself.Radial-flow type power plant plan exerted oneself arrange one to exert oneself and can adjust preface between the water power minimum output, guarantee just to reduce the runoff water power after water power is reduced to minimum output and exert oneself can adjusting between wind-powered electricity generation.
3, the preface value at cost formation method of wind-powered electricity generation:
Predict that according to wind-force providing wind-powered electricity generation estimates to exert oneself.Provide a preface between firm output and runoff water power are exerted oneself between 0 plan of exerting oneself of wind-powered electricity generation exerted oneself.Guarantee after the radial-flow type water power is adjusted to the right place, just to abandon the wind adjustment.
4, the preface value at cost formation method of other class power supplys:
Thermoelectric, refinery: the generating of cogeneration power plant, refinery power plant is relevant with other production technologies of power plant, therefore handle as the firm output unit, its plan exerted oneself provides a low-down preface cost, guarantees can preferentially be loaded into this plan and exert oneself in the planning process.
LNG power plant: LNG, Liquefied Natural Gas, liquefied natural gas is meant the generating set that acts as a fuel with liquefied natural gas.These units are carried out the double shift peak regulation in operation of power networks, at the low-valley interval full cut-off, give and the thermoelectricity peak regulation suitable preface in 80% position of exerting oneself in peak period, guarantee its fine peak regulation effect of playing that can be in operation.
Then with the preface cost curve of above-mentioned gained, operational factor and network load data in conjunction with each unit, according to per 15 minutes periods in one day, make up a three-dimensional preface cost space with time dimension, unit dimension and capacity dimension, and the preface cost of each each period of unit has the dull characteristic that rises, and makes the security-constrained dispatch function have the versatility under the different systems.
In the preface cost space generative process, the segmentation of unit capacity can be adjusted, with the flatness of the generation schedule curve guaranteeing to work out.
The present invention can also further be specially:
Can adopt the Mathematical Planning software kit efficiently to be found the solution according to the constructed security-constrained dispatch Mathematical Modeling of formula (1).Formula (1) is realized the cost minimization of complete set unified purchase electricity under electricity market; Realize that under the energy-saving distribution system purchasing electric coal consumption minimizes; Realizing purchasing the electricity order under " three public affairs " scheduling minimizes.
Adopt the Mathematical Planning software kit to require to provide one group of cost space when finding the solution by time dimension, unit dimension and capacity dimension to formula (1).Each unit must be according to the capacity monotonic increase at the cost of each period in this cost space.
The present invention is by the summary to unit output loading sequence under " three public affairs " system, the method of establishment generating " preface cost " has been proposed, the security-constrained dispatch Mathematical Modeling that formula (1) is made up has versatility under different systems, reduce the kernel software development cost.This method can also be generalized under the electricity market or energy-saving distribution system with double track characteristic.So-called double track characteristic electricity market or energy-saving distribution system have been meant that part of generating units participates in market competition (perhaps energy-saving distribution), and part of generating units is according to the situation of " three public affairs " dispatching principle scheduling in addition.
In sum, the present invention has following advantage compared to existing technology: provide a kind of and save time under the system in " three public affairs " scheduling, labour-saving cost space generation method.This method is passed through the summary to the production law of scheduling, made up and comprised power generation dispatching load loading sequence, sequential scheduling information is adjusted in constraint, satisfy " the preface cost space " of security-constrained dispatch characteristic, cost management is collaborative in the process of finding the solution the security constraint economic dispatch, the optimized Algorithm of security-constrained dispatch can be adapted to versatility, and " three public affairs " dispatch, energy-saving distribution, the needs of multiple power generation mode such as electricity market are for realizing the generating most optimum distribution of resources, realize big power grid security constraint, reduce grid loss, further improve the power transmission and transformation resource a new solution route is provided.
Description of drawings
Fig. 1 is that the universality cost space makes up applied system in the security-constrained dispatch of the present invention, i.e. the structural representation of the key data flow chart of power generation dispatching planning a few days ago.
Figure 2 shows that the schematic flow sheet of universality cost space generation method in the security-constrained dispatch of the present invention.
Below in conjunction with accompanying drawing the present invention is carried out more detailed description.
Embodiment
Most preferred embodiment:
With reference to accompanying drawing 1: the key data flow chart of power generation dispatching planning a few days ago.It is technical solutions according to the invention that the universality cost space makes up.Among the figure, the work functions of each module is as follows:
It is the generating curve that reports its plan for the power plant of refinery power plant, LNG power plant, cogeneration of heat and power that power plant's information reports.
It is the generation schedule curve that all kinds of hydroelectric plants and wind-powered electricity generation factory are provided for the structure of cost space that water is transferred automated system.
Medium-term and long-term risk management system is to provide plan electric weight and plan load factor for the thermal power plant in the structure of universality cost space.
Manual intervention is to be used to set the firm output unit, and for they formulate fixed curve.
The overhaul management system makes up the restriction of exerting oneself that power plant's experimentation is provided for the universality cost space.
Data platform provides the operational factor of Power Plant for the universality cost space makes up, such as: the steady combustion of de-oiling is exerted oneself, minimum technology is exerted oneself, normally lowly exert oneself, high output, startup-shutdown typical curve etc.
The universality cost space offers SCUC﹠amp with cost after making up; The SCED module is optimized calculating.
The overhaul management system also is SCUC﹠amp; SCED provides network topology change information.
The Constraints Management system is SCUC﹠amp; SCED provides all kinds of constraintss of operation of power networks.
Function below in conjunction with accompanying drawing 1 is described further technical solutions according to the invention:
With reference to accompanying drawing 2, the generation method in universality cost space in the security-constrained dispatch includes following steps:
A kind of parameter setting apparatus is provided, is used for being provided with their preface cost distribution space according to dissimilar power supply power generation dispatching rules and all kinds of unit operation characteristic;
A kind of data fetch device is provided, is used to read and the relevant master data of cost space establishment, comprising: unit parameter, operation constraint etc.;
A kind of data calibration device is provided, it receives the master data in parameter and the data fetch device of being provided with in parameter setting apparatus, and, parameter and master data carry out logic determines to being set, the inconsistent master data that parameter and correspondence are set is fed back in parameter setting apparatus and the data fetch device, again receive and read, up to logic determines both sides data fit condition.
Load all kinds of power supply loads in the following order;
The minimum de-oiling of 1 start thermoelectricity surely combustion is exerted oneself, and promptly the fired power generating unit for the start operation at first will run to the steady position of exerting oneself of firing of its de-oiling;
2 fixing operation unit outputs, for because of unit maintenance, disappearing lacks or other process technology limit need need be loaded into its firm output value earlier according to the unit of firm output operation;
3 wind-powered electricity generation plans are exerted oneself, with the maximum output limit value of wind-powered electricity generation as the plan value of exerting oneself; The planned value of day part wind-powered electricity generation will preferentially satisfy, if system when supply falls short of demand, wind-powered electricity generation is owing to be subjected to the limit value of wind-force can't rise from power, exerts oneself but really can fall when network constraint or when drug on the market;
4 cogeneration units plans are exerted oneself, and are in operation, and cogeneration units can provide a minimum technology and exert oneself, and this is used for guaranteeing that generating can guarantee safe heat supply.Under the network constraint situation, can exert oneself like this and drop to the operation of exerting oneself of minimum technology from plan;
5 water power plans are exerted oneself, and according to the regimen prediction, optimize plan value of exerting oneself that each water power is determined in the back in conjunction with striding the basin;
The minimum technology of 6 fired power generating unit is exerted oneself, on above basis with each fired power generating unit according to schedule load factor order from big to small be loaded into minimum technology and exert oneself;
The normal low technical of 7 fired power generating unit is exerted oneself, on above basis with each fired power generating unit according to schedule load factor order from big to small be loaded into normal operation low technical value of exerting oneself;
The 8LNG unit output, the peaking performance of LNG unit is relatively good, and low ebb is shut down generally speaking, and peak start operation.
The normal peak regulation of 9 fired power generating unit is exerted oneself, and loads exerting oneself of each fired power generating unit according to each thermoelectricity plan load factor sequence alternate from big to small on above basis, arrives first expectation and exerts oneself, and exerts oneself to maximum radix, up to the load needs that satisfy system again;
10 water power exceed the power space, exceed power generating order according to water power, alternately exert oneself, up to the load needs that satisfy system from the peak regulation space that each water power plan is exerted oneself the maximum output;
11 cogeneration units maximum output if exerting oneself of other kinds unit all is with completely, also can't satisfy the system loading needs, then will call the beyond the planned quota of cogeneration units and exert oneself, up to its maximum output.
Set firm output unit and firm output value; Some unit is not because exerting oneself in experiment or the inspection travel to fix does peaking operation, and this is that staff planners need specify the unit of these firm outputs and their firm output value.
The loading rule of exerting oneself in the planning process according to above-mentioned data that provide and all kinds of power supplys, exerting oneself of each generating set exerted oneself and be divided into plurality of sections from the 0 maximum technology of exerting oneself, and be that each section set its preface value at cost, formed a kind of cost space that can be used for security-constrained dispatch.The preface cost value generation method of concrete each power supply is as follows:
Thermoelectricity: plan electric weight, the electric weight load factor of at first setting each thermal power plant; With the total electric weight of the generating of thermoelectricity according to schedule the pro rata distribution of electric weight become the expectation electric weight to each power plant, and generate the expected load rate; The expected load rate is deducted the de-oiling Wen Ran corresponding load factor of exerting oneself, form and adjust the electric weight load factor; According to adjusting electric weight load factor rank order from high in the end, with its as exert oneself from de-oiling Wen Ran to minimum technology, minimum technology is exerted oneself and is normally lowly exerted oneself, the normal low order that the preface cost is worked out the maximum output of exerting oneself;
Secondly according to exerting oneself that the pro rata distribution day part fired power generating unit of each fired power generating unit expectation electric weight is born, obtain each fired power generating unit expectation value of exerting oneself at day part;
The 3rd utilizes the normally preface cost scope of the low maximum output of exerting oneself of fired power generating unit, makes up a relevant marginal preface cost of bearing with all fired power generating unit of total load curve linear, obtains day part thermoelectricity limit preface cost;
Utilize each fired power generating unit to exert oneself and the normal low preface of exerting oneself the normal low of day part at last, the line that expectation is exerted oneself and thermoelectricity limit preface cost forms makes up from the preface cost of the normal low maximum output of exerting oneself.
Water power: water power is divided into radial-flow type water power and can adjust water power is arranged.Give a preface cost of exerting oneself to adjusting exerting oneself of water power between radial-flow type water power and de-oiling Wen Ran from 0 plan of exerting oneself; Give a preface cost for the plan maximum output of exerting oneself greater than the thermoelectricity maximum output, with guarantee thermoelectricity complete load just to load in order after full can adjust water power and exert oneself, thermoelectricity high-fall behind the de-oiling Wen Ran just in order the reduction plan that can adjust water power exert oneself.Radial-flow type power plant plan exerted oneself arrange one to exert oneself and can adjust preface between the water power minimum output, guarantee just to reduce the runoff water power after water power is reduced to minimum output and exert oneself can adjusting between wind-powered electricity generation.
Wind-powered electricity generation: predict that according to wind-force providing wind-powered electricity generation estimates to exert oneself.Provide a preface between firm output and runoff water power are exerted oneself between 0 plan of exerting oneself of wind-powered electricity generation exerted oneself.Guarantee after the radial-flow type water power is adjusted to the right place, just to abandon the wind adjustment.
Thermoelectric, refinery: the generating of cogeneration power plant, refinery power plant is relevant with other production technologies of power plant, therefore handle as the firm output unit, its plan exerted oneself provides a low-down preface cost, guarantees can preferentially be loaded into this plan and exert oneself in the planning process.
LNG power plant: LNG, Liquefied Natural Gas, liquefied natural gas is meant the generating set that acts as a fuel with liquefied natural gas.These units are carried out the double shift peak regulation in operation of power networks, at the low-valley interval full cut-off, give and the thermoelectricity peak regulation suitable preface in 80% position of exerting oneself in peak period, guarantee its fine peak regulation effect of playing that can be in operation.
Preface cost curve with above-mentioned gained, operational factor and network load data in conjunction with each unit, according to per 15 minutes periods in one day, make up a three-dimensional preface cost space with time dimension, unit dimension and capacity dimension, and the preface cost of each each period of unit has the dull characteristic that rises, and makes the security-constrained dispatch function have the versatility under the different systems.
In the preface cost space generative process, the segmentation of unit capacity can be adjusted, with the flatness of the generation schedule curve guaranteeing to work out.
It is same as the prior art that the present invention does not state part.
Claims (12)
1. the generation method in universality cost space in the security-constrained dispatch may further comprise the steps:
A kind of parameter setting apparatus is provided, is used for being provided with their preface cost distribution space according to dissimilar power supply power generation dispatching rules and all kinds of unit operation characteristic;
A kind of data fetch device is provided, is used to read and the relevant master data of cost space establishment, comprising:
Unit parameter, operation constraint etc.;
A kind of data calibration device is provided, it receives the master data in parameter and the data fetch device of being provided with in parameter setting apparatus, and, parameter and master data carry out logic determines to being set, the inconsistent master data that parameter and correspondence are set is fed back in parameter setting apparatus and the data fetch device, again receive and read, up to logic determines both sides data fit condition;
Load all kinds of power supplys in proper order according to following rule:
1. under " three public affairs " scheduling, can load unit output according to the order of firm output unit, regenerative resource (wind-powered electricity generation etc.), water power, thermoelectricity; Dry season based on hydroelectric peak, wet season based on the thermoelectricity peak regulation, under energy-saving distribution, can load unit output in proper order according to the generating of statutory regulation;
2. fired power generating unit is exerted oneself according to the needs order loading from high in the end of load factor; Each fired power generating unit according to de-oiling Wen Ran exert oneself, minimum technology is exerted oneself, normally lowly exert oneself, order that maximum technology is exerted oneself loads and exerts oneself; Hydropower Unit is divided into scalable (week regulate and more than) and unadjustable water power two big classes, and the uncontrollable scalable water power that has precedence over generates electricity; The LNG unit is determined the peaking operation mode as required;
3. the preface cost that each fired power generating unit expectation is exerted oneself according to the The Theory Construction of marginal electricity price;
The loading rule of exerting oneself in the planning process according to above-mentioned data that provide and all kinds of power supplys, exerting oneself of each generating set exerted oneself and be divided into plurality of sections from the 0 maximum technology of exerting oneself, and be that each section set its preface value at cost, formed a kind of cost space that can be used for security-constrained dispatch.
2. the generation method in universality cost space is characterized in that in the security-constrained dispatch according to claim 1, and the rule based on all kinds of power supply loads of above-mentioned loading provides a kind of loading sequence for reference, is the preface model:
1. the minimum de-oiling of thermoelectricity of starting shooting surely combustion is exerted oneself, and promptly the fired power generating unit for the start operation at first will run to the steady position of exerting oneself of firing of its de-oiling;
2. fixing operation unit output, for because of unit maintenance, disappearing lacks or other process technology limit need need be loaded into its firm output value earlier according to the unit of firm output operation;
3. the wind-powered electricity generation plan is exerted oneself, wind-powered electricity generation plan value of exerting oneself that prediction is calculated according to wind-force;
4. the cogeneration units plan is exerted oneself, by the recommended value of exerting oneself of cogeneration units according to the proposition of heat supply situation;
5. the water power plan is exerted oneself, and according to the regimen prediction, optimizes plan value of exerting oneself that each water power is determined in the back in conjunction with striding the basin;
6. the minimum technology of fired power generating unit is exerted oneself, on above basis with each fired power generating unit according to schedule load factor order from big to small be loaded into minimum technology and exert oneself;
7. the normal low technical of fired power generating unit is exerted oneself, on above basis with each fired power generating unit according to schedule load factor order from big to small be loaded into normal operation low technical value of exerting oneself;
8. LNG unit output, the peaking performance of LNG unit is relatively good, and low ebb is shut down generally speaking, and peak start operation;
9. the normal peak regulation of fired power generating unit is exerted oneself, and loads exerting oneself of each fired power generating unit according to each thermoelectricity plan load factor sequence alternate from big to small on above basis, arrives first expectation and exerts oneself, exert oneself to maximum radix again, and, up to the load needs that satisfy system;
10. water power exceed the power space, exceed power generating order according to water power, alternately exert oneself, up to the load needs that satisfy system from the peak regulation space that each water power plan is exerted oneself the maximum output;
The cogeneration units maximum output if exerting oneself of other kinds unit all is with completely, also can't satisfy the system loading needs, then will call the beyond the planned quota of cogeneration units and exert oneself, up to its maximum output.
3. the generation method in universality cost space is characterized in that in the security-constrained dispatch according to claim 2, and unit output unloading order is opposite with loading sequence.
4. the generation method in universality cost space is characterized in that in the security-constrained dispatch according to claim 2, raises according to above order when system's generation network constraint need be raised unit output; When need reducing unit output, system's generation network constraint reduces according to above order backward.
5. the generation method in universality cost space in the security-constrained dispatch according to claim 2, it is characterized in that, under same preface model, can adopt the mode of rank order or translocation sorting to carry out the establishment of preface cost for the preface cost of same class unit, form a kind of preface scheme.
6. the generation method in universality cost space in the security-constrained dispatch according to claim 5, it is characterized in that, in the generation schedule compilation process, according to the requirement of actual motion, the sorting position of the indivedual units of Iterim Change is drawn preface thereby form a batch total under same preface scheme.
7. the generation method in universality cost space in the security-constrained dispatch according to claim 1, it is characterized in that, after finishing the establishment of preface cost space, introduce the network loss factor, revise corresponding preface cost, make and to realize the minimized purpose of network loss in the generation schedule compilation process.
8. the generation method in universality cost space is characterized in that in the security-constrained dispatch according to claim 1, the preface value at cost formation method of thermoelectricity:
At first set plan electric weight, the electric weight load factor of each thermal power plant; With the total electric weight of the generating of thermoelectricity according to schedule the pro rata distribution of electric weight become the expectation electric weight to each power plant, and generate the expected load rate; The expected load rate is deducted the de-oiling Wen Ran corresponding load factor of exerting oneself, form and adjust the electric weight load factor; According to adjusting electric weight load factor rank order from high in the end, with its as exert oneself from de-oiling Wen Ran to minimum technology, minimum technology is exerted oneself and is normally lowly exerted oneself, the normal low order that the preface cost is worked out the maximum output of exerting oneself;
Secondly according to exerting oneself that the pro rata distribution day part fired power generating unit of each fired power generating unit expectation electric weight is born, obtain each fired power generating unit expectation value of exerting oneself at day part;
The 3rd utilizes the normally preface cost scope of the low maximum output of exerting oneself of fired power generating unit, makes up a relevant marginal preface cost of bearing with all fired power generating unit of total load curve linear, obtains day part thermoelectricity limit preface cost;
Utilize each fired power generating unit to exert oneself and the normal low preface of exerting oneself the normal low of day part at last, the line that expectation is exerted oneself and thermoelectricity limit preface cost forms makes up from the preface cost of the normal low maximum output of exerting oneself.
9. the generation method in universality cost space is characterized in that in the security-constrained dispatch according to claim 1, the preface value at cost formation method of water power: water power is divided into radial-flow type water power and can adjust water power is arranged; Give a preface cost of exerting oneself to adjusting exerting oneself of water power between radial-flow type water power and de-oiling Wen Ran from 0 plan of exerting oneself; Give a preface cost for the plan maximum output of exerting oneself greater than the thermoelectricity maximum output, with guarantee thermoelectricity complete load just to load in order after full can adjust water power and exert oneself, thermoelectricity high-fall behind the de-oiling Wen Ran just in order the reduction plan that can adjust water power exert oneself; Radial-flow type power plant plan exerted oneself arrange one to exert oneself and can adjust preface between the water power minimum output, just reduce the runoff water power after water power is reduced to minimum output and exert oneself can adjusting between wind-powered electricity generation.
10. the generation method in universality cost space is characterized in that in the security-constrained dispatch according to claim 1, the preface value at cost formation method of wind-powered electricity generation: predict that according to wind-force providing wind-powered electricity generation estimates to exert oneself; Provide a preface between firm output and runoff water power are exerted oneself between 0 plan of exerting oneself of wind-powered electricity generation exerted oneself; After adjusting to the right place, just abandons the radial-flow type water power wind adjustment.
11. the generation method in universality cost space is characterized in that in the security-constrained dispatch according to claim 1, the preface value at cost formation method of other class power supplys:
Thermoelectric, refinery: the generating of cogeneration power plant, refinery power plant is relevant with other production technologies of power plant, therefore handle as the firm output unit, its plan exerted oneself provides a low-down preface cost, wants preferentially to be loaded into this plan in the planning process and exerts oneself;
LNG power plant: unit is carried out the double shift peak regulation in operation of power networks, at the low-valley interval full cut-off, gives and the thermoelectricity peak regulation suitable preface in 80% position of exerting oneself in peak period, guarantees its fine peak regulation effect of playing that can be in operation.
12. the generation method in universality cost space according to Claim 8 or in 9 or the 10 or 11 described security-constrained dispatch, it is characterized in that, preface cost curve according to gained, operational factor and network load data in conjunction with each unit, according to per 15 minutes periods in one day, make up a three-dimensional preface cost space with time dimension, unit dimension and capacity dimension, and the preface cost of each each period of unit has the dull characteristic that rises, and formation security-constrained dispatch function has the versatility under the different systems.
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