CN110661283A - Water abandoning and consumption scheduling method and device based on ice cold storage system - Google Patents
Water abandoning and consumption scheduling method and device based on ice cold storage system Download PDFInfo
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Abstract
The embodiment of the invention provides a water curtailment consumption scheduling method and device based on an ice cold storage system, wherein a minimized water curtailment target is used as a primary optimization target, a minimized system coal consumption target is used as a secondary optimization target, and a uniform target function of a scheduling model for realizing water curtailment consumption by using the ice cold storage system is constructed; considering factors of power balance of the power system, power flow distribution of the power system, line transmission capacity and up-down rotation standby of the power system, and constructing operation constraints of the power system; the method comprises the steps of considering the operating characteristics of a thermal power generating unit and the operating characteristics of a hydroelectric generating unit to construct a characteristic constraint of a power system unit; the ice cold storage system operation constraint is established by considering the factors of the ice cold storage device electric heat coupling, the heat balance and the cold storage system capacity; and (4) constructing the thermal property constraint of the building by considering the thermal equivalent model of the building and the factors of refrigeration guarantee. The comprehensive and detailed modeling is carried out on the electric power system comprising the ice cold storage device, and the assessment of the abandoned water consumption capacity and the maximization of the abandoned water consumption capacity can be realized.
Description
Technical Field
The invention relates to the technical field of renewable energy sources and high-efficiency energy conservation, in particular to a water abandoning and consumption scheduling method and device based on an ice cold storage system.
Background
Clean energy, also known as green energy, refers to energy which does not discharge pollutants and can be directly used for production and life, and mainly comprises solar energy, wind energy, hydroenergy, geothermal energy, tidal energy, biological energy and the like. Clean energy has received worldwide attention due to its availability, renewable properties, and environmental friendliness of the power generation process, and is considered to be one of the main development directions in the future. As a recognized clean energy source of Clean Development Mechanism (CDM), water can be vigorously developed and utilized in the last decade of China, and significant results have been obtained. Taking the southwest area as an example, the southwest area of China has numerous rivers and rich flow, and has larger water resource storage. The hydropower capacity in the southwest can be put into production in a centralized way, and simultaneously, along with the increasing of the supporting strength of China on renewable energy sources in recent years, the development speed of the hydropower in the southwest area is always maintained at a higher level.
In an electric power system, water coming from a hydropower plant has larger uncertainty, when the water coming from the hydropower plant is increased suddenly, if the system cannot absorb the surplus electric energy, water abandon of the hydropower plant can be caused, and at present, the delivery demand of clean energy of a domestic power grid cannot be fully met due to the limitations of a power transmission channel, a power grid structure, the power receiving capacity of a receiving-end power grid and the like, so that the water abandon conflicts and is prominent in a plurality of provinces. The essential of the waste water consumption problem lies in structural and stage mismatch of power grid and power supply construction, and the key lies in that the power output requirement exceeds the safety and stability limit of a power grid channel; the contradiction of water abandon and consumption can be relieved to a certain extent by optimizing the dispatching, but at present, no practical method for dispatching the power grid in real time specially aiming at the water abandon and consumption business exists.
Disclosure of Invention
The invention provides a water abandoning and consumption scheduling method and device based on an ice cold storage system, which overcome the problems or at least partially solve the problems, and solves the problems that the water abandoning phenomenon is serious in the prior art, and the prior water abandoning and consumption operation mode is not enough to realize the evaluation of the water abandoning and consumption capacity and the maximization of the consumption capacity.
According to one aspect of the invention, a water abandoning and consumption scheduling method based on an ice cold storage system is provided, which comprises the following steps:
the method comprises the steps of taking the minimum abandoned water of a water power plant in a power system as a primary optimization target, taking the minimum coal consumption of a thermal power plant in the power system as a secondary optimization target, and constructing a unified objective function of abandoned water consumption;
constructing an electric power system operation constraint function, an electric power system unit characteristic constraint function, an ice storage system operation constraint function and an ice storage system building thermal characteristic constraint function;
and constructing a abandoned water consumption scheduling model based on the unified objective function, the power system operation constraint function, the power system unit characteristic constraint function, the ice storage system operation constraint function and the ice storage system building thermal characteristic constraint function, and controlling the abandoned water quantity in the power system and the consumption quantity of the ice storage system.
According to another aspect of the present invention, there is also provided a waste water consumption scheduling device based on an ice storage system, comprising:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the water curtailment scheduling method based on the ice storage system.
According to another aspect of the present invention, there is also provided a non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium stores computer instructions for causing the computer to execute the water discard consumption scheduling method based on the ice thermal storage system.
The invention provides a water abandoning and consumption scheduling method and a device based on an ice cold storage system, wherein a minimized water abandoning target is used as a primary optimization target, a minimized system coal consumption target is used as a secondary optimization target, and a uniform target function of a scheduling model for realizing water abandoning and consumption by using the ice cold storage system is constructed; considering factors of power balance of the power system, power flow distribution of the power system, line transmission capacity and up-down rotation standby of the power system, and constructing operation constraints of the power system; the method comprises the steps of considering the operating characteristics of a thermal power generating unit and the operating characteristics of a hydroelectric generating unit to construct a characteristic constraint of a power system unit; the ice cold storage system operation constraint is established by considering the factors of the ice cold storage device electric heat coupling, the heat balance and the cold storage system capacity; and (4) constructing the thermal property constraint of the building by considering the thermal equivalent model of the building and the factors of refrigeration guarantee. According to the method, the comprehensive and detailed modeling is carried out on the electric power system comprising the ice cold storage device, so that the assessment of the abandoned water consumption capacity and the maximization of the abandoned water consumption capacity can be realized.
Drawings
Fig. 1 is a schematic flow chart of a water curtailment scheduling method based on an ice storage system according to an embodiment of the invention;
fig. 2 is a schematic diagram of a water discard consumption scheduling device based on an ice storage system according to an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Along with the gradual slow down of the load growth speed in China, the outward delivery channel is limited and the receiving willingness of an external network is gradually reduced, so that the water and electricity network access in southwest areas is increasingly blocked, and the water abandoning phenomenon is more serious. Meanwhile, the Chongqing area is taken as a main representative, and the southwest area is hot in summer, so that the cooling demand is very large; therefore, in order to ensure that the clean energy is fully utilized, the water energy resource needs to be consumed in a wider range through trans-provincial or trans-regional transaction. When the water-disposal of the hydropower station in the power system is possible, whether the system absorbs the water-disposal or not and the absorption is less, the analysis is carried out according to both the technical feasibility and the economic rationality, and only when the system has enough absorption space and simultaneously absorbs the water-disposal, the economic benefit is achieved, so that the absorption of the water-disposal is economically significant.
Due to the improvement of industrial development and the living standard of people's material culture, the popularization rate of air conditioners is increased year by year, the power consumption is increased rapidly, the peak power is short, and the off-peak power cannot be fully applied. Therefore, how to shift peak power demand, "shift peak and fill valley", balance power supply, and improve effective utilization of electric energy becomes a problem that many countries pay attention to solve at present. The aggressiveness of using off-peak power is further driven by the adoption of "time-of-use price" policies, as well as certain motivational policies. This makes the off-peak cold accumulation technology attach importance and develop. The ice storage system uses the night low-valley load electric power to make ice and store the ice in the ice storage device, and the ice melting in the daytime releases the stored cold energy so as to reduce the electric load of the air conditioner and the installed capacity of the air conditioning system during the peak time of the power grid.
Therefore, in this embodiment, a method for scheduling water discard consumption based on an ice storage system is characterized by including:
the method comprises the steps of taking the minimum abandoned water of a water power plant in a power system as a primary optimization target, taking the minimum coal consumption of a thermal power plant in the power system as a secondary optimization target, and constructing a unified objective function of abandoned water consumption;
constructing an electric power system operation constraint function, an electric power system unit characteristic constraint function, an ice storage system operation constraint function and an ice storage system building thermal characteristic constraint function;
and constructing a abandoned water consumption scheduling model based on the unified objective function, the power system operation constraint function, the power system unit characteristic constraint function, the ice storage system operation constraint function and the ice storage system building thermal characteristic constraint function, and controlling the abandoned water quantity in the power system and the consumption quantity of the ice storage system.
Specifically, in this embodiment, the method aims at reducing the water abandon amount of the system as a primary objective and reducing the coal consumption of the system as a secondary objective, and comprehensively considers the operation constraint of the system, and specifically includes: the method comprises the following steps of establishing a scheduling model for realizing waste water consumption by using an ice storage system according to electric power system operation constraint, electric power system unit characteristic constraint, ice storage system operation constraint and building thermal characteristic constraint, and realizing assessment of waste water consumption capacity and maximization of consumption capacity, wherein an electric power system operation constraint function is established by considering electric power system power balance, electric power system power flow distribution, line transmission capacity and electric power system up-and-down rotation standby factors; the method comprises the steps that a power system unit characteristic constraint function is constructed by considering the operating characteristics of a thermal power generating unit and the operating characteristics of a hydroelectric generating unit; constructing an ice storage system operation constraint function by considering factors of the electric-thermal coupling, the heat balance and the capacity of the ice storage system of the ice storage device; and (4) constructing a constraint function of the thermal characteristics of the building by considering the thermal equivalent model of the building and the factors of refrigeration guarantee. The comprehensive and detailed modeling is carried out on the electric power system comprising the ice cold storage device, so that the assessment of the abandoned water consumption capacity and the maximization of the abandoned water consumption capacity can be realized.
In this embodiment, the method for minimizing the water abandonment of the hydroelectric power plant in the power system is taken as a primary optimization target, and specifically includes:
based on the number of the water power plants in the power system, the maximum power generation drainage quantity of each hydraulic power plant and the drainage flow of the hydraulic power plants in each time period in a scheduling period, a first-level optimization objective function is constructed by taking the minimum water abandonment of the hydraulic power plants as a first-level optimization objective:
in the formula, NhyThe number of hydraulic power plants; n is the number of time segments in the scheduling period; Δ t is the duration of each time period;
the maximum power generation water discharge amount of the ith hydraulic power plant in the dispatching cycle is obtained;
and the drainage flow of the ith hydraulic power plant in the t-th time period in the scheduling cycle is obtained.
In this embodiment, the scheduling period refers to a minimum time interval of the dispatching department rolling-scheduling the output of the unit in the power system, and in this embodiment, is one day. The scheduling period refers to a minimum discrete interval of continuous time in one scheduling cycle, which is 15min in this embodiment.
On the basis of the above embodiment, the method for minimizing coal consumption of a thermal power plant in a power system is taken as a secondary optimization target, and specifically includes:
based on the number of the thermal power plants in the power system, the coal consumption factor of each thermal power plant and the output of the thermal power plants in each time period in the scheduling cycle, a secondary optimization objective function is constructed by taking the minimized coal consumption as a secondary optimization objective:
in the formula, NthmThe number of thermal power plants; gamma rayiThe coal consumption factor of the ith thermal power plant;
in this embodiment, the output of the ith thermal power plant in the t-th time period in the scheduling cycle satisfies a quadratic relationship between the coal consumption and the power output of the thermal power plant.
On the basis of the above embodiment, the unified objective function is:
where ε is the coupling factor. Epsilon is the coupling factor of the first-level and second-level optimization targets. Epsilon is usually small, e.g. 10-6. When the abandoned water exists, the optimization problem mainly meets the primary optimization target due to the small epsilon, and the secondary optimization target hardly works. And when no water is abandoned, the first term in the objective function is 0, and the optimization target is converted into a secondary optimization target.
On the basis of the embodiment, the construction of the power system operation constraint function specifically comprises the steps of constructing a power balance constraint of the power system, a power flow distribution constraint of the power system, a line transmission capacity constraint, an upward spinning reserve constraint and a downward spinning reserve constraint;
because power system needs to satisfy real-time power balance, include thermal power plant, the power plant's of exerting oneself from the electricity generation angle, include conventional electric load one-level ice cold-storage electric load from the power consumption angle, consequently, in this embodiment, power system power balance restraint is:
in the formula, Nl、NcRespectively a non-ice cold-storage load and an ice cold-storage loadThe number of the loads;
the output of the ith hydraulic power plant in the t time period in the dispatching cycle;
active power of the ith non-ice storage load in the t period in the scheduling cycle;
the refrigeration power of the ith ice storage load in the t-th time period in the dispatching cycle;
the calculation of the power flow distribution of the power system adopts a direct current power flow calculation model, and the power flow distribution constraint of the power system is as follows:
in the formula, j is a node number; k is a line number; gk-jA power flow transfer distribution factor of the node j to the line k;
active power transmitted for the kth line at the tth time period in the scheduling cycle;
the line transmission capacity constraints are:
in the formula (I), the compound is shown in the specification,
the upper limit and the lower limit of the transmission active power of the branch k are respectively set;
the upper spinning standby constraint and the lower spinning standby constraint are as follows:
in the formula (I), the compound is shown in the specification,
respectively setting the upper limit and the lower limit of the output of the ith thermal power plant;the upper limit and the lower limit of the output of the ith hydraulic power plant are respectively; r isu、rdThe scale coefficients of the system for standby spin-up and standby spin-down are respectively.
On the basis of the embodiment, the construction of the power system unit characteristic constraint function specifically comprises the construction of thermal power unit operation characteristic constraints and hydroelectric power unit operation characteristic constraints;
because the output regulation rate of the thermal power generating unit is limited, and thermal power has fixed capacity, in this embodiment, the operating characteristic constraint of the thermal power generating unit is as follows:
in the formula (I), the compound is shown in the specification,
the maximum climbing rate and the maximum descending rate of the ith thermal power plant output are respectively;
the output of the hydroelectric generating set mainly depends on the height of a water head, and meanwhile, the reduction of the height of the water head is in direct proportion to the flow range of the drained water, and in the embodiment, the running characteristic constraint of the hydroelectric generating set is as follows:
in the formula, A is a hydroelectric conversion constant; etaiEfficiency of the hydroelectric power plant i;
the water head height of the ith hydraulic power plant in the t-th time period in the dispatching cycle; xiiThe average storage capacity area of the ith hydropower plant;and the minimum power generation drainage quantity of the ith hydraulic power plant in the dispatching period.
On the basis of the embodiment, the construction of the ice storage system operation constraint function specifically comprises the steps of constructing an ice storage system electric-heat coupling relationship constraint, an ice storage system heat balance relationship constraint and a cold storage system capacity constraint;
the electric-heat coupling relationship of the ice cold storage system is constrained as follows:
in the formula (I), the compound is shown in the specification,
the electric refrigerating capacity of the ith ice cold storage system in the t-th time period in the dispatching cycle is obtained; COP is the refrigeration efficiency of the refrigerator;the upper limit of the refrigeration power of the ith ice storage system in the t-th period in the scheduling cycle is set;
the cold load of the ice storage system can be realized by electric refrigeration on the one hand, and can also be realized by ice melting refrigeration on the other hand, the two are mutually complementary, in this embodiment, the constraint of the heat balance relationship of the ice storage system is as follows:
in the formula (I), the compound is shown in the specification,
the ice melting refrigeration capacity of the ith ice storage system in the t time period in the scheduling cycle is determined;
the cold load of the ith ice storage system in the t period in the scheduling cycle;
the cold storage amount of the cold storage system varies depending on the cold storage power and the dissipation, which is considered herein to be proportional to the cold storage amount. At the same time, constrained by the operating conditions, the cold storage system should have the same cold storage amount at the beginning and end of the scheduling period, in this embodiment, the capacity constraint of the cold storage system is:
in the formula, Si,tThe ice storage amount of the ith ice storage system in the t-th time period in the scheduling cycle is determined; k is a radical oflossIs the dissipation factor of the ice storage device; si,maxThe upper limit of the ice storage amount of the ith ice storage system;
respectively is the upper limit of the ice melting rate and the upper limit of the ice storage rate of the ith ice storage system.
On the basis of the embodiment, the construction of the thermal characteristic constraint function of the ice storage system building specifically comprises the construction of the thermal equivalent model constraint and the refrigeration guarantee constraint of the building in the ice storage system;
in this embodiment, the differential form of the thermodynamic equivalent model of the building is:
in the present embodiment, the differential term is processed by using forward difference, and the following results are obtained:
the thermal equivalent model constraint of the building in the ice cold storage system is as follows:
in the formula (I), the compound is shown in the specification,
building heat capacity for the ith ice storage system;
building thermal resistance of the ith ice storage system;
the indoor temperature of the building of the ith ice storage system in the tth time period;
is the ambient temperature at the t-th time period.
In this embodiment, the setting is changed along with the change of the ambient temperature, the indoor optimum temperature setting value is also changed along with the change of the ambient temperature, the indoor optimum temperature setting value and the indoor optimum temperature setting value satisfy a primary relationship, and the refrigeration guarantee constraint is as follows:
in the formula (I), the compound is shown in the specification,
setting the temperature for the building indoor in the t-th time period;
the allowable range of the indoor temperature fluctuation of the building; kappa1、κ2To calculate the parameters of the indoor set temperature.
In this embodiment, obtaining the above-mentioned unified objective function, power system operation constraint function, power system unit characteristic constraint function, ice storage system operation constraint function, ice storage system building thermal characteristic constraint function, then a waste water consumption scheduling model may be established, and the waste water amount in the power system and the consumption amount of the ice storage system are controlled, because the consumption scheduling model takes reducing the system waste water amount as a first-level optimization objective, reducing the system coal consumption as a second-level optimization objective, comprehensively considering the operation constraint of the system, specifically including: the method has the advantages that the operation of the electric power system is restricted, the unit characteristic of the electric power system is restricted, the operation of the ice storage system is restricted, and the thermal characteristic of the building is restricted, so that the evaluation of the waste water consumption capacity and the maximization of the consumption capacity can be realized.
Fig. 2 is a block diagram showing a configuration of a water discard consumption scheduling apparatus based on an ice thermal storage system according to an embodiment of the present application.
Referring to fig. 2, the water discard consumption scheduling device based on the ice storage system includes: a processor (processor)810, a memory (memory)830, a communication Interface (Communications Interface)820, and a bus 840;
wherein the content of the first and second substances,
the processor 810, the memory 830 and the communication interface 820 complete communication with each other through the bus 840;
the processor 810 is configured to call program instructions in the memory 830 to execute the water curtailment consumption scheduling method based on the ice thermal storage system provided by the foregoing method embodiments, including:
the method comprises the steps of taking the minimum abandoned water of a water power plant in a power system as a primary optimization target, taking the minimum coal consumption of a thermal power plant in the power system as a secondary optimization target, and constructing a unified objective function of abandoned water consumption;
constructing an electric power system operation constraint function, an electric power system unit characteristic constraint function, an ice storage system operation constraint function and an ice storage system building thermal characteristic constraint function;
and constructing a abandoned water consumption scheduling model based on the unified objective function, the power system operation constraint function, the power system unit characteristic constraint function, the ice storage system operation constraint function and the ice storage system building thermal characteristic constraint function, and controlling the abandoned water quantity in the power system and the consumption quantity of the ice storage system.
This embodiment still discloses a abandon water and absorb scheduling equipment based on ice cold-storage system, includes:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the water curtailment scheduling method based on the ice storage system, for example, the method comprises the following steps:
the method comprises the steps of taking the minimum abandoned water of a water power plant in a power system as a primary optimization target, taking the minimum coal consumption of a thermal power plant in the power system as a secondary optimization target, and constructing a unified objective function of abandoned water consumption;
constructing an electric power system operation constraint function, an electric power system unit characteristic constraint function, an ice storage system operation constraint function and an ice storage system building thermal characteristic constraint function;
and constructing a abandoned water consumption scheduling model based on the unified objective function, the power system operation constraint function, the power system unit characteristic constraint function, the ice storage system operation constraint function and the ice storage system building thermal characteristic constraint function, and controlling the abandoned water quantity in the power system and the consumption quantity of the ice storage system.
The present embodiment also discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the water curtailment scheduling method based on an ice storage system provided by the above-mentioned method embodiments, for example, the method includes:
the method comprises the steps of taking the minimum abandoned water of a water power plant in a power system as a primary optimization target, taking the minimum coal consumption of a thermal power plant in the power system as a secondary optimization target, and constructing a unified objective function of abandoned water consumption;
constructing an electric power system operation constraint function, an electric power system unit characteristic constraint function, an ice storage system operation constraint function and an ice storage system building thermal characteristic constraint function;
and constructing a abandoned water consumption scheduling model based on the unified objective function, the power system operation constraint function, the power system unit characteristic constraint function, the ice storage system operation constraint function and the ice storage system building thermal characteristic constraint function, and controlling the abandoned water quantity in the power system and the consumption quantity of the ice storage system.
The present embodiment also provides a non-transitory computer-readable storage medium storing computer instructions, which cause the computer to execute the water curtailment scheduling method based on the ice thermal storage system provided in the foregoing method embodiments, for example, the method includes:
the method comprises the steps of taking the minimum abandoned water of a water power plant in a power system as a primary optimization target, taking the minimum coal consumption of a thermal power plant in the power system as a secondary optimization target, and constructing a unified objective function of abandoned water consumption;
constructing an electric power system operation constraint function, an electric power system unit characteristic constraint function, an ice storage system operation constraint function and an ice storage system building thermal characteristic constraint function;
and constructing a abandoned water consumption scheduling model based on the unified objective function, the power system operation constraint function, the power system unit characteristic constraint function, the ice storage system operation constraint function and the ice storage system building thermal characteristic constraint function, and controlling the abandoned water quantity in the power system and the consumption quantity of the ice storage system.
In summary, the invention provides a water curtailment scheduling method and device based on an ice storage system, which take a minimized water curtailment target as a primary optimization target and a minimized system coal consumption target as a secondary optimization target, and construct a uniform objective function of a scheduling model for realizing water curtailment by using the ice storage system; considering factors of power balance of the power system, power flow distribution of the power system, line transmission capacity and up-down rotation standby of the power system, and constructing operation constraints of the power system; the method comprises the steps of considering the operating characteristics of a thermal power generating unit and the operating characteristics of a hydroelectric generating unit to construct a characteristic constraint of a power system unit; the ice cold storage system operation constraint is established by considering the factors of the ice cold storage device electric heat coupling, the heat balance and the cold storage system capacity; and (4) constructing the thermal property constraint of the building by considering the thermal equivalent model of the building and the factors of refrigeration guarantee. According to the method, the comprehensive and detailed modeling is carried out on the electric power system comprising the ice cold storage device, so that the assessment of the abandoned water consumption capacity and the maximization of the abandoned water consumption capacity can be realized.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the test equipment and the like of the display device are merely illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A water abandoning and consumption scheduling method based on an ice cold storage system is characterized by comprising the following steps:
the method comprises the steps of taking the minimum abandoned water of a water power plant in a power system as a primary optimization target, taking the minimum coal consumption of a thermal power plant in the power system as a secondary optimization target, and constructing a unified objective function of abandoned water consumption;
constructing an electric power system operation constraint function, an electric power system unit characteristic constraint function, an ice storage system operation constraint function and an ice storage system building thermal characteristic constraint function;
and constructing a abandoned water consumption scheduling model based on the unified objective function, the power system operation constraint function, the power system unit characteristic constraint function, the ice storage system operation constraint function and the ice storage system building thermal characteristic constraint function, and controlling the abandoned water quantity in the power system and the consumption quantity of the ice storage system.
2. The abandoned water consumption scheduling method based on the ice storage system according to claim 1, wherein the minimized abandoned water of the hydroelectric power plant in the power system is taken as a primary optimization target, and specifically comprises:
based on the number of the water power plants in the power system, the maximum power generation drainage quantity of each hydraulic power plant and the drainage flow of the hydraulic power plants in each time period in a scheduling period, a first-level optimization objective function is constructed by taking the minimum water abandonment of the hydraulic power plants as a first-level optimization objective:
in the formula, NhyThe number of hydraulic power plants; n is the number of time segments in the scheduling period; Δ t is the duration of each time period;
the maximum power generation water discharge amount of the ith hydraulic power plant in the dispatching cycle is obtained;
and the drainage flow of the ith hydraulic power plant in the t-th time period in the scheduling cycle is obtained.
3. The water curtailment consumption scheduling method based on the ice storage system as claimed in claim 2, wherein the minimization of coal consumption by a thermal power plant in the power system is taken as a secondary optimization target, and specifically comprises:
based on the number of the thermal power plants in the power system, the coal consumption factor of each thermal power plant and the output of the thermal power plants in each time period in the scheduling cycle, a secondary optimization objective function is constructed by taking the minimized coal consumption as a secondary optimization objective:
in the formula, NthmThe number of thermal power plants; gamma rayiThe coal consumption factor of the ith thermal power plant;
and the output of the ith thermal power plant in the t-th time period in the dispatching cycle is obtained.
4. The water curtailment consumption scheduling method based on an ice storage system according to claim 3, wherein the unified objective function is:
where ε is the coupling factor.
5. The water curtailment consumption scheduling method based on the ice storage system as claimed in claim 4, wherein the constructing of the power system operation constraint function specifically comprises constructing a power system power balance constraint, a power system power flow distribution constraint, a line transmission capacity constraint, an upward spinning reserve constraint and a downward spinning reserve constraint;
the power system power balance constraint is as follows:
in the formula, Nl、NcThe number of the non-ice cold accumulation load and the number of the ice cold accumulation load are respectively;
the output of the ith thermal power plant in the t-th time period in the dispatching cycle is obtained;
the output of the ith hydraulic power plant in the t time period in the dispatching cycle;
active power of the ith non-ice storage load in the t period in the scheduling cycle;
the refrigeration power of the ith ice storage load in the t-th time period in the dispatching cycle;
the power flow distribution constraint of the power system is as follows:
in the formula, j is a node number; k is a line number; gk-jA power flow transfer distribution factor of the node j to the line k;
active power transmitted for the kth line at the tth time period in the scheduling cycle;
the line transmission capacity constraints are:
in the formula (I), the compound is shown in the specification,
the upper limit and the lower limit of the transmission active power of the branch k are respectively set;
the upper spinning standby constraint and the lower spinning standby constraint are as follows:
in the formula (I), the compound is shown in the specification,
respectively setting the upper limit and the lower limit of the output of the ith thermal power plant;
the upper limit and the lower limit of the output of the ith hydraulic power plant are respectively; r isu、rdThe scale coefficients of the system for standby spin-up and standby spin-down are respectively.
6. The water abandoning and consumption scheduling method based on the ice storage system as claimed in claim 5, wherein the constructing of the power system unit characteristic constraint function specifically comprises constructing thermal power unit operation characteristic constraints and hydroelectric power unit operation characteristic constraints;
the thermal power generating unit operation characteristic constraint is as follows:
in the formula (I), the compound is shown in the specification,the maximum climbing rate and the maximum descending rate of the ith thermal power plant output are respectively;
the constraint of the running characteristics of the hydroelectric generating set is as follows:
in the formula, A is a hydroelectric conversion constant; etaiEfficiency of the hydroelectric power plant i;the water head height of the ith hydraulic power plant in the t-th time period in the dispatching cycle; xiiThe average storage capacity area of the ith hydropower plant;
and the minimum power generation drainage quantity of the ith hydraulic power plant in the dispatching period.
7. The abandoned water consumption scheduling method based on the ice storage system according to claim 1, wherein the construction of the ice storage system operation constraint function specifically comprises construction of an ice storage system electric-thermal coupling relationship constraint, an ice storage system heat balance relationship constraint and a storage system capacity constraint;
the electric-heat coupling relationship of the ice cold storage system is constrained as follows:
in the formula (I), the compound is shown in the specification,the electric refrigerating capacity of the ith ice cold storage system in the t-th time period in the dispatching cycle is obtained; COP is the refrigeration efficiency of the refrigerator;
the upper limit of the refrigeration power of the ith ice storage system in the t-th period in the scheduling cycle is set;
the heat balance relationship of the ice cold storage system is constrained as follows:
in the formula (I), the compound is shown in the specification,
the ice melting refrigeration capacity of the ith ice storage system in the t time period in the scheduling cycle is determined;
the cold load of the ith ice storage system in the t period in the scheduling cycle;
the capacity constraint of the cold accumulation system is as follows:
Si,N＝Si,0
0≤Si,t≤Si,max
in the formula, Si,tThe ice storage amount of the ith ice storage system in the t-th time period in the scheduling cycle is determined; k is a radical oflossIs the dissipation factor of the ice storage device; si,maxThe upper limit of the ice storage amount of the ith ice storage system;
respectively is the upper limit of the ice melting rate and the upper limit of the ice storage rate of the ith ice storage system.
8. The abandoned water consumption scheduling method based on the ice storage system according to claim 1, wherein the building thermal property constraint function of the ice storage system specifically comprises building a thermal equivalent model constraint and a refrigeration guarantee constraint of a building in the ice storage system;
the thermal equivalent model constraint of the building in the ice cold storage system is as follows:
in the formula (I), the compound is shown in the specification,building heat capacity for the ith ice storage system;
building thermal resistance of the ith ice storage system;
the indoor temperature of the building of the ith ice storage system in the tth time period; t ist envIs the ambient temperature at the t-th time period;
the refrigeration guarantee constraints are:
Tt set＝κ1Tt env+κ2
in the formula, Tt setSetting the temperature for the building indoor in the t-th time period;the allowable range of the indoor temperature fluctuation of the building; kappa1、κ2To calculate the parameters of the indoor set temperature.
9. The utility model provides a abandon water and absorb scheduling device based on ice cold-storage system which characterized in that includes:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 8.
10. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 8.
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