CN117543721B - Optimized scheduling method, device, equipment and medium for cascade water wind-solar complementary system - Google Patents

Optimized scheduling method, device, equipment and medium for cascade water wind-solar complementary system Download PDF

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CN117543721B
CN117543721B CN202410017873.7A CN202410017873A CN117543721B CN 117543721 B CN117543721 B CN 117543721B CN 202410017873 A CN202410017873 A CN 202410017873A CN 117543721 B CN117543721 B CN 117543721B
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李杨
吴峰
何胜明
方旎
焦烨
缪益平
蹇德平
蒲瑜
丁仁山
史林军
林克曼
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Yalong River Hydropower Development Co Ltd
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Yalong River Hydropower Development Co Ltd
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Abstract

The invention relates to the technical field of optimal scheduling of power systems, in particular to an optimal scheduling method, device, equipment and medium of a cascade water wind-light complementary system, wherein the method comprises the following steps: establishing constraint conditions of step water wind-solar complementary system scheduling, wherein the constraint conditions comprise: electric power characteristic constraint, hydraulic characteristic constraint and water-electricity coupling characteristic constraint of the cascade hydropower station, and water-wind-light coupling characteristic constraint and output characteristic constraint of the cascade water-wind-light complementary system; according to constraint conditions, taking the maximum sum of the medium-long-term scheduling effect and the short-term scheduling effect of the cascade water-wind-solar system as an objective function, and constructing a cascade water-wind-solar complementary system scheduling model; and solving the scheduling model by using a linearization method to obtain an optimized scheduling result. According to the invention, a step hydroelectric-wind power-photovoltaic complementary system power generation scheme meeting the constraint can be provided, the overall utility of the system is improved, the waste wind and the waste light are reduced, the resource integration of a new energy power generation system is realized, and the safe and stable operation of a power grid is ensured.

Description

Optimized scheduling method, device, equipment and medium for cascade water wind-solar complementary system
Technical Field
The invention relates to the technical field of optimal scheduling of power systems, in particular to an optimal scheduling method, device, equipment and medium of a cascade water wind-light complementary system.
Background
In order to meet the requirement of low-carbon transformation of Chinese energy, new energy is continuously developed. However, as the permeability of new energy sources represented by photovoltaic, wind power and the like in an electric power system gradually increases, huge operation pressure and safety challenges are brought to the electric power system, so that the new energy source power generation has higher adaptability to the coordinated operation of other power generation modes.
Through the consideration of various aspects such as the power generation characteristics, the power generation cost, the environmental benefit and the like of the power generation forms, the water electricity is an ideal flexible energy source, the flexible adjustment capability of the step water electricity can be utilized to complementarily and coordinately operate with the wind power generation and the photovoltaic power generation in the continuous development, and the safe and stable operation of the system is realized through the combined optimized dispatching of the step water electricity, the wind power and the photovoltaic power generation system.
The power system is developed, the middle-long term scheduling and the short-term scheduling jointly standardize the operation of the power system, under the great background of continuous development of new energy, the traditional power system is gradually connected with a new energy complementary system, and various scheduling modes jointly act, so that the optimal scheduling mode of cascade water-wind-solar complementary is realized, the wind and light abandoning is reduced, and the scheduling effect is improved to be the hot trend of current research.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention provides an optimized scheduling method, device, equipment and medium for a cascade water wind-light complementary system, so that the problems in the background technology are effectively solved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: an optimized scheduling method of a step water wind-solar complementary system comprises the following steps:
establishing constraint conditions for step water wind-solar complementary system scheduling, wherein the constraint conditions comprise: electric power characteristic constraint, hydraulic characteristic constraint and water-electricity coupling characteristic constraint of the cascade hydropower station, and water-wind-light coupling characteristic constraint and output characteristic constraint of the cascade water-wind-light complementary system;
according to the constraint condition, taking the maximum sum of the medium-long term scheduling effect and the short-term scheduling effect of the cascade water-wind-solar system as an objective function, and constructing a cascade water-wind-solar complementary system scheduling model;
and solving the scheduling model by using a linearization method to obtain an optimized scheduling result.
Further, the objective function includes:
；
；
；
；
；
wherein,for mid-long term scheduling utility, < >>For short-term scheduling utility, < >>Scheduling utility for day before->For real-time scheduling utility->Planning total electricity for day, +.>For medium-long term scheduling utility parameters->For short-term scheduling utility parameter,/->In a stair water wind-solar complementary systemtDeclaration of force of time period->Planned power decomposition for step water wind-solar complementary system daytThe output of the time period is that,sfor the typical scene number, +.>、/>Is thattTime period scenariosThe deviation of positive and negative output force is generated,is thattScene with time period containing uncertainty of wind and light outputsProbability of->、 />For real-time schedulingtThe positive and negative imbalance utility parameter of the time period.
Further, the power characteristic constraint comprises a hydropower station output upper limit and lower limit constraint, a unit start-stop running state constraint and a unit minimum start-stop duration constraint:
；
；
；
wherein,the machine set start-stop state variable is a 0-1 variable, when the state variable is 1, the machine set start-up is represented, and when the state variable is 0, the machine set stop is represented, and the machine set stop is represented>、/>The minimum and maximum output limits of the power station, respectively, are dependent on the operating conditions of the hydroelectric power plant, the installed capacity, the power line limits, < ->For power stationsiUnit setgAt the position oftTime period of output->And->Respectively +.>Level hydropower station->The water power unit is->Starting and stopping operation variables at moment, if the machine set executes starting operation, the machine set is +.>1, otherwise->0, if the unit is->Executing the stopping operation at any time, then1, otherwise->Is 0; />，/>Respectively +.>Level hydropower station->Minimum start-up and minimum shut-down duration of the station hydroelectric generating set.
Further, the hydraulic characteristic constraints include a water balance constraint, a water storage constraint, a power station ex-warehouse flow constraint, a warehouse water level constraint, a preliminary and final water level control constraint, a water level-warehouse capacity constraint and a tail water level-downdraft flow constraint:
；
；
；
；
；
；
；
；
；
；
wherein,for power stationsiAt the position oftReservoir for time periodWater storage capacity>Is the firstiStage hydropower stationtNatural water flow at moment->Is->Grade hydropower station to->Water flow time lag between the stage hydropower stations, +.>For a long period of time>、/>Respectively power stationsiAt the position oftMinimum, maximum water storage allowed by the period, < > water storage>、/>Respectively +.>Level hydropower station->The upper limit and the lower limit of the power generation flow of the hydropower station unit, < ->、/>Respectively power stationsiUpper limit and lower limit of reservoir water level, and +.>For power stationsiAt the position oftUpstream water level of time period->For power stationsiAt the position oftTime-consuming water purifying head->For power stationsiAt the position oftThe tail water level of the time period,for power stationsiAt the position oftHead loss of period->For scheduling start time->The initial water level of the stage reservoir is m;for the ∈th at the end of scheduling>The target of the level reservoir controls the water level.
Further, the hydropower coupling characteristic constraint includes:
；
is water density, unit is kg/m 3 The value is 1; />The unit is N/kg and the value is 9.8;is->Stage hydropower station/>The power generation efficiency of the hydroelectric generating set is mainly related to the power generation water head of the generating set; />Is->Time->The unit of the power generation water head of the unit in the stage hydropower station is m; />Is->Time->Level hydropower station->And the power generation flow of the hydroelectric generating set.
Further, the water-wind-solar coupling characteristic constraint includes an outgoing channel capacity limit:
；
wherein,for the actual output of the step water wind-solar complementary system, < >>The maximum capacity of an outgoing channel of the cascade water wind-solar complementary system is achieved.
Further, the output characteristic constraint comprises a medium-long term scheduling electric quantity constraint and a real-time scheduling positive and negative output deviation constraint:
；
。
further, the solving the scheduling model by using a linearization method includes:
firstly, carrying out piecewise linearization treatment on the hydraulic characteristic constraint;
carrying out linearization treatment on the output characteristic constraint by adopting a McCormick convex hull relaxation method;
and solving the scheduling model by using a mixed integer linear programming method to obtain the active output of the cascade hydropower station in each period.
The invention also comprises an optimized dispatching device of the step water wind-light complementary system, which comprises the following steps:
the constraint establishment unit is used for establishing constraint conditions of the step water wind-solar complementary system scheduling, and the constraint conditions comprise: electric power characteristic constraint, hydraulic characteristic constraint and water-electricity coupling characteristic constraint of the cascade hydropower station, and water-wind-light coupling characteristic constraint and output characteristic constraint of the cascade water-wind-light complementary system;
the modeling unit is used for constructing a cascade water wind-solar complementary system scheduling model by taking the maximum sum of the medium-long term scheduling utility and the short-term scheduling utility of the cascade water wind-solar system as an objective function according to the constraint condition;
and the solving unit is used for solving the scheduling model by using a linearization method to obtain an optimized scheduling result.
The invention also includes a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, which processor implements the method as described above when executing the computer program.
The invention also includes a storage medium having stored thereon a computer program which, when executed by a processor, implements a method as described above.
The beneficial effects of the invention are as follows: according to the invention, a step water wind and solar complementary system dispatching model containing step water power, wind power and photovoltaic power generation is established, the sum of the medium-long term dispatching utility and the short-term dispatching utility of the whole system is maximized as an objective function, the step hydropower station electric power characteristic constraint, the step hydropower station hydraulic-electric coupling characteristic constraint and the step water wind and solar coupling constraint are taken as constraint conditions, the step water wind and solar complementary system dispatching model is established, and finally the model is solved to obtain the optimal dispatching result of the step water wind and solar system, so that a step water power-wind power-photovoltaic complementary system power generation scheme meeting the constraint can be provided, the whole utility of the system is improved, the waste wind and waste light is reduced, the resource integration of a new energy power generation system is realized, and the safe and stable operation of a power grid is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a flow chart of the method of example 1;
FIG. 2 is a schematic view of the structure of the device in example 1;
FIG. 3 is a graph of planned output of a step hydropower system and a wind-solar combined system in a step hydropower wind-solar complementary system in example 2;
FIG. 4 is a utility parameter curve of power dispatching in embodiment 2;
FIG. 5 is a schematic diagram of a medium-long term dispatch break-out force and a short term dispatch declaration force of a planned output in a cascade water wind-solar hybrid system in example 2;
fig. 6 is a schematic diagram of the output of each stage power station of the cascade hydropower station in the cascade water wind-solar complementary system in embodiment 2;
FIG. 7 is a schematic diagram of the planned output and the actual output of the system in the step water wind-solar complementary system in example 2;
fig. 8 is a schematic structural diagram of a computer device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1: an optimized scheduling method of a step water wind-solar complementary system comprises the following steps:
establishing constraint conditions of step water wind-solar complementary system scheduling, wherein the constraint conditions comprise: electric power characteristic constraint, hydraulic characteristic constraint and water-electricity coupling characteristic constraint of the cascade hydropower station, and water-wind-light coupling characteristic constraint and output characteristic constraint of the cascade water-wind-light complementary system;
according to constraint conditions, taking the maximum sum of the medium-long-term scheduling effect and the short-term scheduling effect of the cascade water-wind-solar system as an objective function, and constructing a cascade water-wind-solar complementary system scheduling model;
and solving the scheduling model by using a linearization method to obtain an optimized scheduling result.
The cascade water wind and solar complementary system dispatching model with cascade water power, wind power and photovoltaic power generation is established, the sum of the medium and long term dispatching utility and the short term dispatching utility of the whole maximized system is taken as an objective function, the power characteristic constraint of the cascade hydropower station, the hydraulic characteristic constraint of the cascade hydropower station, the water-electricity coupling characteristic constraint of the cascade hydropower station and the water-wind-solar coupling constraint are taken as constraint conditions, the cascade water wind and solar complementary system dispatching model is established, and finally the optimal dispatching result of the cascade water wind and solar system can be obtained by solving the model, so that the power generation scheme of the cascade water power, wind power and photovoltaic complementary system meeting the constraint can be provided, the whole utility of the system is improved, the waste wind and waste light are reduced, the resource integration of the new energy power generation system is realized, and the safe and stable operation of a power grid is ensured.
In this embodiment, the objective function includes:
；
；
；
；
；
wherein,for mid-long term scheduling utility, < >>For short-term scheduling utility, < >>Scheduling utility for day before->For real-time scheduling utility->Planning total electricity for day, +.>For medium-long term scheduling utility parameters->For short-term scheduling utility parameter,/->In a stair water wind-solar complementary systemtDeclaration of force of time period->Planned power decomposition for step water wind-solar complementary system daytThe output of the time period is that,sfor the typical scene number, +.>、/>Is thattTime period scenariosLower positive and negative force bias,/->Is thattScene with time period containing uncertainty of wind and light outputsProbability of->、/>For real-time schedulingtThe positive and negative imbalance utility parameter of the time period.
The power characteristic constraint comprises a hydropower station output upper limit constraint, a hydropower station output lower limit constraint, a unit start-stop running state constraint and a unit minimum start-stop duration constraint:
；
；
；
wherein,the machine set start-stop state variable is a 0-1 variable, when the state variable is 1, the machine set start-up is represented, and when the state variable is 0, the machine set stop is represented, and the machine set stop is represented>、/>The minimum and maximum output limits of the power station, respectively, are dependent on the operating conditions of the hydroelectric power plant, the installed capacity, the power line limits, < ->For power stationsiUnit setgAt the position oftTime period of output->And->Respectively +.>Level hydropower station->The water power unit is->Starting and stopping operation variables at moment, if the machine set executes starting operation, the machine set is +.>1, otherwise->0, if the unit is->Executing the stopping operation at any time, then1, otherwise->Is 0; /> ，/>Respectively +.>Level hydropower station->Minimum start-up and minimum shut-down duration of the station hydroelectric generating set.
The hydraulic characteristic constraint comprises a water balance constraint, a water storage constraint, a power station ex-warehouse flow constraint, a warehouse water level constraint, a primary and final water level control constraint, a water level-warehouse capacity constraint and a tail water level-downward drainage flow constraint:
；
；
；
；
；
；
；
；
；
；
wherein,for power stationsiAt the position oftReservoir water storage capacity of period->Is the firstiStage hydropower stationtNatural water flow at moment->Is->Grade hydropower station to->Water flow time lag between the stage hydropower stations, +.>For a long period of time>、/>Respectively power stationsiAt the position oftMinimum, maximum water storage allowed by the period, < > water storage>、/>Respectively +.>Level hydropower station->Table waterUpper and lower limits of the power generation flow of the motor unit, +.>、/>Respectively power stationsiUpper limit and lower limit of reservoir water level, and +.>For power stationsiAt the position oftUpstream water level of time period->For power stationsiAt the position oftTime-consuming water purifying head->For power stationsiAt the position oftTail water level of period>For power stationsiAt the position oftHead loss of period->For scheduling start time->The initial water level of the stage reservoir is m; />For the ∈th at the end of scheduling>The target of the level reservoir controls the water level.
The hydropower coupling characteristic constraints include:
；
is of water density in kg- m 3 The value is 1; />The unit is N/kg and the value is 9.8;is->Level hydropower station->The power generation efficiency of the hydroelectric generating set is mainly related to the power generation water head of the generating set; />Is->Time->The unit of the power generation water head of the unit in the stage hydropower station is m; />Is->Time->Level hydropower station->And the power generation flow of the hydroelectric generating set.
The water-wind-light coupling characteristic constraint comprises the capacity limitation of an outgoing channel:
；
wherein,for the actual output of the step water wind-solar complementary system, < >>The maximum capacity of an outgoing channel of the cascade water wind-solar complementary system is achieved.
The output characteristic constraint comprises a medium-and-long-term dispatching electric quantity constraint and a real-time dispatching positive and negative output deviation constraint:
；
。
the method for solving the scheduling model by using the linearization method comprises the following steps:
firstly, carrying out piecewise linearization treatment on hydraulic characteristic constraint;
then, carrying out linearization treatment on the output characteristic constraint by adopting a McCormick convex hull relaxation method;
and solving a scheduling model by using a mixed integer linear programming method to obtain the active output of the cascade hydropower station in each period.
As shown in fig. 2, the embodiment further includes an optimized dispatching device of the step water wind-light complementary system, and the method includes:
the constraint establishing unit is used for establishing constraint conditions of the step water wind-solar complementary system scheduling, and the constraint conditions comprise: electric power characteristic constraint, hydraulic characteristic constraint and water-electricity coupling characteristic constraint of the cascade hydropower station, and water-wind-light coupling characteristic constraint and output characteristic constraint of the cascade water-wind-light complementary system;
the modeling unit is used for constructing a cascade water wind light complementary system scheduling model by taking the maximum sum of the medium-long term scheduling utility and the short-term scheduling utility of the cascade water wind light system as an objective function according to constraint conditions;
and the solving unit is used for solving the scheduling model by using a linearization method to obtain an optimized scheduling result.
Example 2:
the scheme in the embodiment comprises the following steps:
firstly, establishing an objective function of optimal scheduling of a cascade water wind-solar complementary system as follows:
；
；
；
；
；
then, specific information of the cascade hydropower station is acquired, and constraint conditions of the cascade water wind-light complementary system are established as follows:
1) The expression of the power characteristic constraint of the cascade hydropower station of the cascade water wind-solar complementary system is as follows:
；
；
；
wherein,for the state variable of machine start-stop, it is a 0-1 variable, when the state variableWhen 1, the machine set is started, and when 0, the state variable is stopped, the machine set is stopped, and the machine set is stopped>、/>The minimum and maximum output limits of the power station, respectively, are generally dependent on the operating conditions of the hydroelectric generating set, the installed capacity, the power line limits, etc.)>For power stationsiUnit setgAt the position oftTime period of output->And->Respectively +.>Level hydropower station->The water power unit is->Starting and stopping operation variables at moment, if the machine set executes starting operation, the machine set is +.>1, otherwise->0, if the unit performs a shutdown operation at the moment +.>1, otherwise->Is 0; />，/>Respectively +.>Level hydropower station->Minimum start-up and minimum shut-down duration of the station hydroelectric generating set.
The expression of the hydraulic characteristic constraint of the cascade hydropower station of the cascade water wind-solar complementary system is as follows:
；
；
；
；
；
；
；
；
；
；
wherein,for power stationsiAt the position oftReservoir water storage capacity of period->Is the firstiStage hydropower stationtNatural water flow at moment->Is->Grade hydropower station to->Water flow time lag between the stage hydropower stations, +.>For a long period of time>、/>Respectively power stationsiAt the position oftMinimum, maximum water storage allowed by the period, < > water storage>、/>Respectively +.>Level hydropower station->The upper limit and the lower limit of the power generation flow of the hydropower station unit, < ->、/>Respectively power stationsiIs limited by the upper limit and the lower limit of the water level of the reservoir. />For power stationsiAt the position oftUpstream water level of time period->For power stationsiAt the position oftTime-consuming water purifying head->For power stationsiAt the position oftThe tail water level of the time period,for power stationsiAt the position oftHead loss of period->For scheduling start time->An initial water level (m) of the stage reservoir; />For the end of dispatchiThe target of the level reservoir controls the water level.
The expression of the cascade hydropower station water-electricity coupling characteristic constraint of the cascade water-wind-light complementary system is as follows:
；
is water density (kg/m) 3 ) The value is 1; />Is heavyForce acceleration (N/kg), the value is 9.8; />Is->Level hydropower station->The power generation efficiency of the hydroelectric generating set is mainly related to the power generation water head of the generating set; />Is->Time of day (time)Generating water heads (m) of units in the stage hydropower station; />Is->Time->Level hydropower station->And the power generation flow of the hydroelectric generating set.
Wherein, parameters of the cascade hydropower station are shown in table 1:
TABLE 1
2) The expression of the water-wind-light coupling characteristic constraint of the cascade water-wind-light complementary system is as follows:
；
wherein,for the actual output of the step water wind-solar complementary system, < >>The maximum capacity of an outgoing channel of the cascade water wind-solar complementary system is achieved.
3) The expression of the output constraint of the cascade water wind-light complementary system is as follows:
；
；
then, linearizing the constraint conditions to establish a mixed integer linear model of the cascade water wind-light complementary system scheduling: piecewise linearization is carried out on the water level-reservoir capacity constraint and the tail water level-lower drainage flow constraint, and linearization is carried out on the hydroelectric generating set processing characteristic constraint by adopting a McCormick convex hull relaxation method; and solving a step water wind and light complementary system scheduling model by using a mixed integer linear programming method to obtain a scheduling scheme of the step water wind and light complementary system.
And finally, solving a mixed integer linear model of the cascade water wind and light complementary system coordinated optimization scheduling by adopting a Gurobi 9.5.1 solver to obtain a cascade water wind and light complementary system scheduling scheme, which is shown in figures 3 to 7.
FIG. 3 is a graph of planned output of a step hydropower system and a planned output of a wind-light combined system in a step hydropower wind-light complementary system in an embodiment of the invention; FIG. 4 is a graph of utility parameters for power dispatching in an embodiment of the present invention; FIG. 5 is a schematic diagram of a medium-long term dispatch decomposition output and a short term dispatch declaration output of a planned output in a cascade water wind-solar complementary system in an embodiment of the invention; FIG. 6 is a schematic diagram of the output of each stage power station of the cascade hydropower station in the cascade water wind-solar complementary system in the embodiment of the invention; fig. 7 is a schematic diagram of planned output and actual output of a system in a step water wind-solar complementary system according to an embodiment of the present invention.
Please refer to fig. 8, which illustrates a schematic structural diagram of a computer device provided in an embodiment of the present application. The embodiment of the present application provides a computer device 400, including: a processor 410 and a memory 420, the memory 420 storing a computer program executable by the processor 410, which when executed by the processor 410 performs the method as described above.
The present embodiment also provides a storage medium 430, on which storage medium 430 a computer program is stored which, when executed by the processor 410, performs a method as above.
The storage medium 430 may be implemented by any type or combination of volatile or nonvolatile Memory devices, such as static random access Memory (Static Random Access Memory, SRAM), electrically erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), programmable Read-Only Memory (PROM), read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.
In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (4)

1. An optimized scheduling method of a step water wind-solar complementary system is characterized by comprising the following steps:
establishing constraint conditions for step water wind-solar complementary system scheduling, wherein the constraint conditions comprise: electric power characteristic constraint, hydraulic characteristic constraint and water-electricity coupling characteristic constraint of the cascade hydropower station, and water-wind-light coupling characteristic constraint and output characteristic constraint of the cascade water-wind-light complementary system;
according to the constraint condition, taking the maximum sum of the medium-long term scheduling effect and the short-term scheduling effect of the cascade water-wind-solar system as an objective function, and constructing a cascade water-wind-solar complementary system scheduling model;
solving the scheduling model by using a linearization method to obtain an optimized scheduling result;
the objective function includes:
；
；
；
；
；
wherein,for mid-long term scheduling utility, < >>For short-term scheduling utility, < >>Scheduling utility for day before->For real-time scheduling utility->Planning total electricity for day, +.>For medium-long term scheduling utility parameters->For short-term scheduling utility parameter,/->In a stair water wind-solar complementary systemtDeclaration of force of time period->Planned power decomposition for step water wind-solar complementary system daytThe output of the time period is that,sfor the typical scene number, +.>、/>Is thattTime period scenariosThe deviation of positive and negative output force is generated,is thattScene with time period containing uncertainty of wind and light outputsProbability of->、/>For real-time schedulingtPositive and negative imbalance utility parameters of the time period;
the power characteristic constraint comprises a hydropower station output upper limit constraint, a hydropower station output lower limit constraint, a unit start-stop running state constraint and a unit minimum start-stop duration constraint:
；
；
；
wherein,the machine set start-stop state variable is a 0-1 variable, when the state variable is 1, the machine set start-up is represented, and when the state variable is 0, the machine set stop is represented, and the machine set stop is represented>、/>The minimum and maximum output limits of the power station, respectively, are dependent on the operating conditions of the hydroelectric power plant, the installed capacity, the power line limits, < ->For power stationsiUnit setgAt the position oftTime period of output->And->Respectively the firstiStage hydropower stationgStation hydroelectric generating settStarting and stopping operation variables at moment, if the machine set executes starting operation, the machine set is +.>1, otherwise->0, if the machine is intExecuting a stop operation at the moment ∈>1, otherwise->Is 0; />，/>Respectively the firstiStage hydropower stationgMinimum start-up and minimum stop duration of the station hydroelectric generating set;
the hydraulic characteristic constraint comprises a water balance constraint, a water storage capacity constraint, a power station ex-warehouse flow constraint, a warehouse water level constraint, a primary and final water level control constraint, a water level-warehouse capacity constraint and a tail water level-downdraft flow constraint:
；
；
；
；
；
；
；
；
；
；
wherein,for power stationsiAt the position oftReservoir water storage capacity of period->Is the firstiStage hydropower stationtThe natural water flow rate at the moment,is->Grade hydropower station to the firstiWater flow time lag between the stage hydropower stations, +.>For a long period of time>、/>Respectively power stationsiAt the position oftMinimum, maximum water storage allowed by the period, < > water storage>、/>Respectively the firstiStage hydropower stationgThe upper limit and the lower limit of the power generation flow of the hydropower station unit, < ->、/>Respectively power stationsiUpper limit and lower limit of reservoir water level, and +.>For power stationsiAt the position oftUpstream water level of time period->For power stationsiAt the position oftTime-consuming water purifying head->For power stationsiAt the position oftTail water level of period>For power stationsiAt the position oftHead loss of period->For the first time of schedulingiThe initial water level of the stage reservoir is m; />For the end of dispatchiThe target control water level of the level reservoir;
the hydropower coupling characteristic constraint includes:
；
is water density, unit is kg/m 3 The value is 1;gthe unit is N/kg and the value is 9.8; />Is the firstiStage hydropower stationgThe power generation efficiency of the hydroelectric generating set is mainly related to the power generation water head of the generating set; />Is thattTime of day (time)iThe unit of the power generation water head of the unit in the stage hydropower station is m; />Is thattTime of day (time)iStage hydropower stationgGenerating flow of the hydropower station unit;
the water-wind-solar coupling characteristic constraint comprises the capacity limitation of an outgoing channel:
；
wherein,for the actual output of the step water wind-solar complementary system, < >>The maximum capacity of an outgoing channel of the cascade water wind-solar complementary system is obtained;
the output characteristic constraint comprises a medium-long term dispatching electric quantity constraint and a real-time dispatching positive and negative output deviation constraint:
；
；
the solving the scheduling model by using a linearization method comprises the following steps:
firstly, carrying out piecewise linearization treatment on the hydraulic characteristic constraint;
carrying out linearization treatment on the output characteristic constraint by adopting a McCormick convex hull relaxation method;
and solving the scheduling model by using a mixed integer linear programming method to obtain the active output of the cascade hydropower station in each period.
2. An optimized dispatching device for a step water wind-solar complementary system, which is characterized in that the method as claimed in any one of claims 1 is used, and the optimized dispatching device comprises:
the constraint establishment unit is used for establishing constraint conditions of the step water wind-solar complementary system scheduling, and the constraint conditions comprise: electric power characteristic constraint, hydraulic characteristic constraint and water-electricity coupling characteristic constraint of the cascade hydropower station, and water-wind-light coupling characteristic constraint and output characteristic constraint of the cascade water-wind-light complementary system;
the modeling unit is used for constructing a cascade water wind-solar complementary system scheduling model by taking the maximum sum of the medium-long term scheduling utility and the short-term scheduling utility of the cascade water wind-solar system as an objective function according to the constraint condition;
and the solving unit is used for solving the scheduling model by using a linearization method to obtain an optimized scheduling result.
3. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 1 when executing the computer program.
4. A storage medium having stored thereon a computer program which, when executed by a processor, implements the method of any of claims 1.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107506873A (en) * 2017-09-21 2017-12-22 武汉大学 Water scene station group synergistic combination division methods and system based on regulation performance
CN111428904A (en) * 2020-01-19 2020-07-17 河海大学 Short-term optimized scheduling method for wind, light and water complementary power generation system containing cascade hydropower
CN115018260A (en) * 2022-05-12 2022-09-06 华能澜沧江水电股份有限公司 Peak regulation optimal scheduling method of cascade water-light complementary power generation system
CN116231767A (en) * 2023-05-11 2023-06-06 南方电网调峰调频发电有限公司储能科研院 Multi-energy complementary scheduling method and system for cascade hydropower station

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107506873A (en) * 2017-09-21 2017-12-22 武汉大学 Water scene station group synergistic combination division methods and system based on regulation performance
CN111428904A (en) * 2020-01-19 2020-07-17 河海大学 Short-term optimized scheduling method for wind, light and water complementary power generation system containing cascade hydropower
CN115018260A (en) * 2022-05-12 2022-09-06 华能澜沧江水电股份有限公司 Peak regulation optimal scheduling method of cascade water-light complementary power generation system
CN116231767A (en) * 2023-05-11 2023-06-06 南方电网调峰调频发电有限公司储能科研院 Multi-energy complementary scheduling method and system for cascade hydropower station

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张歆蒴 等.大型风光水混合能源互补发电系统的优化调度研究.中国农村水利水电.2019,(第12期),181-185. *

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