Electric power system water-wind-light collaborative scheduling optimization method, system, equipment and medium

Abstract

The invention discloses an electric power system water-wind-light collaborative scheduling optimization method, system, device and medium, and relates to the field of electric power scheduling, and the main points of the technical scheme are that the method comprises the steps: obtaining the water abandoning penalty cost of water and electricity, the light abandoning penalty cost of photoelectricity, the wind abandoning penalty cost of wind power, and the load loss penalty cost of the electric power system at any moment; according to the water abandoning punishment cost, the light abandoning punishment cost, the wind abandoning punishment cost and the load loss punishment cost, the total operation cost at any moment is determined; obtaining first operation constraints of pre-configured wind power, photoelectric and electric power systems and second operation constraints of different hydropower types; wherein the water and electricity types comprise runoff water and electricity, adjustable water and electricity and cascade water and electricity; and based on the first operation constraint and the second operation constraint, solving an optimization scheme of the water-wind-light collaborative scheduling of the power system when the total operation cost reaches the minimum. According to the invention, the problem of insufficient precision and flexibility of the scheduling strategy caused by the fact that the type of the hydropower station is not considered during the water-wind-light collaborative scheduling of the power system in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of power dispatching, and more specifically, it relates to a method, system, device and medium for optimizing the coordinated dispatching of water, wind and light in a power system. Background Art

[0002] The grid connection of hydropower, wind power and photovoltaic power has become normal. However, affected by uncertain factors such as human and natural environments, the load will change with the seasons and the energy consumption demands of users within a day. Resources such as wind power and photovoltaic power fluctuate violently and are uncontrollable, and water power will also face the flood season, dry season and normal water period.

[0003] At present, many studies have been carried out on the complementary coordination and integrated dispatching levels of water, wind and light, and different clustering methods are used to generate typical daily curves of wind and light. The output characteristics of hydropower in the flood season, normal water period and dry season have also been analyzed. However, the output fluctuations caused by different types of hydropower stations have not been considered, resulting in insufficient accuracy and flexibility of the dispatching strategy of the power grid in the scenario of high proportion of hydropower and new energy grid connection, and unable to meet the load demands in different scenarios. Summary of the Invention

[0004] The purpose of the present invention is to provide a method, system, device and medium for optimizing the coordinated dispatching of water, wind and light in a power system. The present invention solves the problem of insufficient accuracy and flexibility of the dispatching strategy caused by not considering the type of hydropower station in the coordinated dispatching of water, wind and light in the power system.

[0005] In the first aspect of the present invention, a method for optimizing the coordinated dispatching of water, wind and light in a power system is provided. The method includes:

[0006] Obtain the water abandonment penalty cost, light abandonment penalty cost of photovoltaic power, wind abandonment penalty cost of wind power and load shedding penalty cost of the power system at any moment;

[0007] Determine the total operating cost at any moment according to the water abandonment penalty cost, light abandonment penalty cost, wind abandonment penalty cost and load shedding penalty cost;

[0008] Obtain the first operating constraints of wind power, photovoltaic power and the power system and the second operating constraints of different types of hydropower configured in advance; wherein, the types of hydropower include run-of-river hydropower, adjustable hydropower and cascade hydropower;

[0009] Based on the first operating constraints and the second operating constraints, solve the optimization scheme for the coordinated dispatching of water, wind and light in the power system when the total operating cost reaches the minimum.

[0010] In an implementation scheme, the obtaining the water abandonment penalty cost, light abandonment penalty cost of photovoltaic power, wind abandonment penalty cost of wind power and load shedding penalty cost of the power system at any moment includes:

[0011] Obtain the penalty coefficients, the number of power stations, and the curtailment amounts of hydropower, wind power, and photovoltaic power in the target scheduling area, as well as the loss-of-load penalty coefficient and the loss-of-load amount of the power system;

[0012] Calculate the penalty costs of hydropower, wind power, and photovoltaic power respectively according to their respective penalty coefficients, the number of power stations, and the curtailment amounts;

[0013] And calculate the loss-of-load penalty cost of the power system according to the loss-of-load penalty coefficient and the loss-of-load amount of the power system.

[0014] In one implementation, the second operating constraints of the run-of-river hydropower include the upper and lower limits constraints of the power generation power, the power generation flow constraint, and the ramping constraint;

[0015] The second operating constraints of the adjustable hydropower include the upper and lower limits constraints of the power generation power, the power generation flow constraint, the reservoir capacity inequality constraint, the reservoir capacity constraint, and the ramping constraint;

[0016] The second operating constraints of the cascade hydropower include the upper and lower limits constraints of the power generation power, the power generation flow constraint, the reservoir capacity inequality constraint, the reservoir capacity constraint, the ramping constraint, the power generation flow constraint of the upstream hydropower, and the time-delay effect constraint of the water flow.

[0017] In one implementation, the total operating cost at any moment is the sum of the water curtailment penalty cost, the photovoltaic curtailment penalty cost, the wind curtailment penalty cost, and the loss-of-load penalty cost.

[0018] In the second aspect of the present invention, a power system water-wind-solar collaborative scheduling optimization system is provided, and the system includes:

[0019] The first acquisition module is used to acquire the water curtailment penalty cost of hydropower, the photovoltaic curtailment penalty cost of photovoltaic power, the wind curtailment penalty cost of wind power, and the loss-of-load penalty cost of the power system at any moment;

[0020] The cost calculation module is used to determine the total operating cost at any moment according to the water curtailment penalty cost, the photovoltaic curtailment penalty cost, the wind curtailment penalty cost, and the loss-of-load penalty cost;

[0021] The second acquisition module is used to acquire the first operating constraints of wind power, photovoltaic power, and the power system and the second operating constraints of different types of hydropower configured in advance; wherein, the types of hydropower include run-of-river hydropower, adjustable hydropower, and cascade hydropower;

[0022] The optimization and solution module is used to solve the optimization scheme of the power system water-wind-solar collaborative scheduling when the total operating cost reaches the minimum based on the first operating constraints and the second operating constraints.

[0023] In one implementation, the first acquisition module is specifically used for:

[0024] Obtain the respective penalty coefficients, the number of power stations, and the curtailment amounts of hydropower, wind power, and photovoltaic power in the target scheduling area, as well as the loss-of-load penalty coefficient and the loss-of-load amount of the power system;

[0025] According to the respective penalty coefficients, the number of power stations, and the curtailment amounts of hydropower, wind power, and photovoltaic power, calculate the respective penalty costs of hydropower, wind power, and photovoltaic power;

[0026] And, according to the loss-of-load penalty coefficient and the loss-of-load amount of the power system, calculate the loss-of-load penalty cost of the power system.

[0027] In one implementation, the second operating constraint of the run-of-river hydropower includes the upper and lower limits of the power generation power, the power generation flow constraint, and the ramp constraint;

[0028] The second operating constraint of the adjustable hydropower includes the upper and lower limits of the power generation power, the power generation flow constraint, the reservoir inequality constraint, the reservoir constraint, and the ramp constraint;

[0029] The second operating constraint of the cascade hydropower includes the upper and lower limits of the power generation power, the power generation flow constraint, the reservoir inequality constraint, the reservoir constraint, the ramp constraint, the power generation flow constraint of the upstream hydropower, and the time-delay effect constraint of the water flow.

[0030] In one implementation, the total operating cost at any moment is the sum of the water curtailment penalty cost, the light curtailment penalty cost, the wind curtailment penalty cost, and the loss-of-load penalty cost.

[0031] In a third aspect of the present invention, an electronic device is provided. The electronic device includes a processor, a memory, and a computer program stored on the memory and executable by the processor. When the computer program is executed by the processor, the steps of a method for optimizing the coordinated scheduling of water, wind, and light in a power system provided in the first aspect of the present invention are implemented.

[0032] In a fourth aspect of the present invention, a computer-readable storage medium is provided. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the steps of a method for optimizing the coordinated scheduling of water, wind, and light in a power system provided in the first aspect of the present invention are implemented.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention takes into account the operating characteristics of photovoltaic power, wind power, and power systems, and also considers the operating characteristics of three different types of hydropower stations: run-of-river hydropower stations, adjustable hydropower stations, and cascade hydropower stations. On this basis, with the minimum total operating cost at any given moment as the optimization objective, an optimal solution for the coordinated scheduling of water, wind, and light in the power system can be obtained. The present invention can more accurately reflect the operating conditions of the actual power system, especially in the case of a high proportion of hydropower and large-scale new energy grid connection. By comprehensively considering the operating characteristics of different types of hydropower stations, it is possible to provide a more accurate and flexible scheduling strategy for grid dispatching, optimize the allocation of power resources, and improve the economy and reliability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0036] Figure 1 is a schematic flowchart of an optimization method for coordinated scheduling of water, wind, and light in a power system provided by an embodiment of the present invention;

[0037] Figure 2 is a topological relationship diagram of a cascade hydropower station group provided by an embodiment of the present invention;

[0038] Figure 3 are output curves of different types of hydropower, wind power, and photovoltaic power under different typical daily scenarios provided by an embodiment of the present invention;

[0039] Figure 4 is a principle block diagram of an optimization system for coordinated scheduling of water, wind, and light in a power system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and do not limit the present invention.

[0041] It should be noted that the term "including" or "may include" that can be used in various embodiments of the present application indicates the presence of the claimed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. In addition, as used in various embodiments of the present application, the terms "including", "having", and their cognates are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be construed as first excluding the existence or addition of the possibility of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0042] Please refer to Figure 1 , Figure 1 which is a schematic flow chart of a method for optimizing the coordinated scheduling of hydropower, wind power and photovoltaic power in a power system provided by an embodiment of the present invention. As Figure 1 shown, the method includes:

[0043] S101, obtaining the penalty cost of water abandonment for hydropower, the penalty cost of light abandonment for photovoltaic power, the penalty cost of wind abandonment for wind power, and the penalty cost of load shedding for the power system at any moment.

[0044] In this embodiment, the penalty cost of water abandonment for hydropower, the penalty cost of light abandonment for photovoltaic power, the penalty cost of wind abandonment for wind power, and the penalty cost of load shedding for the power system are relatively common technical terms in the field of power systems. Therefore, no detailed description will be given to them in this embodiment.

[0045] Only the calculation of these penalty costs will be described:

[0046] First, obtain the penalty coefficients, the number of power stations, and the abandonment amounts of hydropower, wind power, and photovoltaic power in the target scheduling area, as well as the penalty coefficient and the load shedding amount of the power system;

[0047] Secondly, calculate the penalty costs of hydropower, wind power, and photovoltaic power respectively according to the penalty coefficients, the number of power stations, and the abandonment amounts of hydropower, wind power, and photovoltaic power; and calculate the penalty cost of load shedding for the power system according to the penalty coefficient and the load shedding amount of the power system.

[0048] Specifically, the calculation formula for the penalty cost of water abandonment is

[0049] The calculation formula for the penalty cost of wind abandonment is

[0050] The calculation formula for the penalty cost of light abandonment is

[0051] The calculation formula for the penalty cost of load shedding is where c h , c w , c p , c l are the penalty coefficients of water abandonment, wind abandonment, light abandonment, and load shedding respectively; N h , N w , N p are the numbers of hydropower stations, wind power stations, and photovoltaic power stations respectively; ΔQ ht , are the water abandonment amount of the hth hydropower station at time t, the wind power abandonment amount of the wind farm at time t, the photovoltaic power abandonment amount of the photovoltaic power station at time t, and the load shedding amount at time t respectively.

[0052] S102. Determine the total operating cost at any moment according to the penalty cost of water abandonment, the penalty cost of light abandonment, the penalty cost of wind abandonment, and the penalty cost of load shedding.

[0053] In this embodiment, it is the sum of the penalty cost of water abandonment, the penalty cost of light abandonment, the penalty cost of wind abandonment, and the penalty cost of load shedding.

[0054] The calculation formula of the total operating cost is

[0055] S103. Obtain the first operating constraints of wind power, photovoltaic power, and the power system configured in advance, as well as the second operating constraints of different types of hydropower; wherein, the types of hydropower include run-of-river hydropower, adjustable hydropower, and cascade hydropower.

[0056] In this embodiment, the first operating constraints of wind power, photovoltaic power, and the power system are described as follows:

[0057] First, the output of wind power and photovoltaic power is restricted by the upper and lower limits of output, and the specific expressions are as follows:

[0058]

[0059] In the formula, respectively represent the lower limit and upper limit of the available power generation of the wind power and photovoltaic units at time t.

[0060] Define the abandoned power of wind power and photovoltaic power at time t as The specific expression is:

[0061]

[0062] The system power constraint must ensure that at any given moment, the power generation of the power system must be balanced with the load demand, that is:

[0063]

[0064] In the formula, P t L is the system load at time t.

[0065] 3) Hydropower constraints and their linearization

[0066] This invention focuses on the optimal scheduling problem of water-wind-solar with a high proportion of hydropower. Therefore, the working principles of run-of-river, adjustable, and cascade hydropower stations are considered for constraints respectively.

[0067] It is known that the power generation of a hydropower station is related to the power generation efficiency, head, and flow rate of the hydropower station, and can be calculated by the following formula:

[0068] P ht =g hη h Q ht H ht (12), where P ht is the power generation of hydropower station h at time t; g is the hydropower conversion constant; η h is the power generation efficiency of hydropower station h, and the efficiency varies with the size of the hydropower station and is usually regarded as a constant in medium- and long-term power balance analysis; Q ht is the power generation flow of hydropower station h during time period t; H ht is the head of hydropower station h during time period t.

[0069] First of all, runoff, adjustable, and cascade hydropower stations are all subject to the upper and lower limits of power generation P ht and the ramp constraint of the hydropower station. The specific expressions are as follows:

[0070] where are the minimum and maximum power generations of hydropower station h respectively; Equation (14) is the ramp constraint of hydropower station h, and σ h is the maximum ramp rate of hydropower station h.

[0071] For runoff hydropower stations, their power generation flow is closely related to the runoff passing through the hydropower station. The specific calculation formula is:

[0072] ΔQ ht =R ht -Q ht (16). Equation (15) is the constraint of the power generation flow of the runoff hydropower station. f ht is a 0-1 variable. When the runoff of the hydropower station exceeds the maximum power generation flow, f ht is 1, resulting in water abandonment; when the runoff of the hydropower station is less than the maximum power generation flow, f ht is 0, Equation (16) is the calculation formula for the water abandonment volume ΔQ ht , indicating the remaining part after removing the flow Q ht used for power generation from the runoff R ht . At this time, the power generation of the runoff hydropower station is There is only one variable, the power generation flow Q ht .

[0073] Adjustable hydropower stations are hydropower stations with regulation functions, which can better adapt to the changes in power demand, can flexibly respond to the output fluctuations of wind and solar power stations, and can be divided into daily regulation, monthly regulation, seasonal regulation, and annual regulation according to the time scale. The specific constraints are as follows:

[0074]

[0075] V ht = V h,t-1 +(R ht - Q ht -ΔQ ht )Δt(19), Equation (17) is the power generation flow constraint on hydropower station h, including the constraint on the discarded water ΔQ ht constraint, is the minimum power generation flow of the adjustable hydropower station; Equation (18) is the reservoir capacity inequality and initial and final reservoir capacity constraints on hydropower station h, V ht is the reservoir capacity of hydropower station h at time t, are the minimum and maximum reservoir capacities of hydropower station h respectively. At t = 0, V h,0 = v h,0 At t = N T time, v h,0 and v h,NT are both constants; Equation (19) is the reservoir capacity balance constraint of adjustable hydropower station h, R ht is the natural inflow, Δt is the cycle duration of water storage and discharge of the adjustable hydropower station, generally in hours, days, weeks, months, seasons, years as the cycle. This constraint ensures that the adjustable hydropower station can generate electricity and store water effectively and in a timely manner within the cycle.

[0076] A cascade hydropower station is a set of adjustable hydropower stations in the same basin that can influence each other. It not only has the regulation ability, but also the upstream power station will affect the downstream power station. Specifically, the water released during the power generation process of the upstream power station will flow into the downstream power station after a certain time delay and serve as the inflow of the downstream power station. Similar to a general adjustable hydropower station, a cascade hydropower station must also comply with the power generation flow constraint, reservoir capacity inequality constraint, initial and final reservoir capacity constraints of the adjustable hydropower station, and the non - negative discarded water volume constraint, as shown in Equations (13)-(17) above. However, in the reservoir capacity balance constraint of a cascade hydropower station, the power generation flow of the upstream hydropower station and the time delay effect of the water flow need to be considered additionally. The formula is:

[0077]

[0078] Q h-1,t-τ = Q h-1,t-τ +ΔQ h-1,t-τ (21), where h = 1 corresponds to the upstream hydropower station, h = 2 corresponds to the downstream hydropower station, τ is the time delay for the water released by the upstream hydropower station to flow to the next hydropower station, Q h-1,t-τ is the water volume flowing from the upper - level hydropower station to the lower - level hydropower station through the time delay τ, calculated by Equation (19).

[0079] For adjustable cascade hydropower stations, the generating head depends on the water level difference between the upstream and downstream, which means that the head will change correspondingly with the increase or decrease of the reservoir water storage. The specific expression is as follows:

[0080] H ht =h 0,h +α h V ht (22), where h 0,h and α h are both constants. At this time, the calculation formula for the generating power of the adjustable hydropower station is There are Q ht and H ht as two variables, and linearization needs to be performed on them.

[0081] S104. Based on the first operating constraint and the second operating constraint, when the total operating cost reaches the minimum, the optimal solution for the coordinated scheduling of water, wind, and light in the power system is solved.

[0082] In this embodiment, in order to reduce the time required for solving and improve the efficiency of solving the optimal solution for the coordinated scheduling of water, wind, and light in the power system, for the non-linear relationship between the water level above the dam and the reservoir capacity, and the tail water level and the discharge flow of the cascade hydropower station, piecewise linearization is performed. The reservoir capacity is divided into L intervals, and the daily reservoir capacity change interval is The relationship between the water level and the reservoir capacity is obtained as follows:

[0083] where V h,l and Z u,h,l are respectively the reservoir capacity and the water level above the dam in the l-th reservoir capacity interval of the h-th hydropower station, both of which are constants; is a 0-1 variable used to judge the interval where the reservoir capacity is located. Based on this, the original relationship between the water level above the dam and the reservoir capacity is transformed into a linear form as follows:

[0084]

[0085] Similarly, the variation range of the discharge flow of the reservoir is divided into M intervals, and the relationship between the tail water level and the generating flow can be obtained as follows:

[0086] where: Q h,m and Z d,h,m are respectively the generating flow and the tail water level in the m-th generating flow interval of the h-th hydropower station, both of which are constants; ψ h,t,m is a 0-1 variable used to judge the interval where the reservoir capacity is located. Based on this, the original relationship between the tail water level and the generating flow is transformed into a linear form as follows:

[0087]

[0088] In summary, in this embodiment, the relationship between the power generation flow and the runoff of the runoff hydropower station is first considered, and a 0-1 variable is introduced to distinguish whether there is water abandonment. Secondly, for the adjustable hydropower station, its power generation flow, reservoir capacity, and reservoir capacity balance are constrained, and these constraints can adapt to the changes in power demand and flexibly respond to the output fluctuations of wind power and solar power generation. On the basis of the adjustable hydropower station, the cascade hydropower station additionally considers the influence of the upstream power station on the downstream power station and the time-delay effect of the water flow. Further, the power generation head of the adjustable and cascade hydropower stations is modeled, and the characteristics of the head changing with the reservoir water storage are described. In order to reduce the time required for solving and improve the solving efficiency, the nonlinear relationship between the upstream water level and the reservoir capacity and between the tail water level and the discharge flow of the cascade hydropower station is piecewise linearized, and the nonlinear relationship is transformed into a linear form.

[0089] The topological relationships of the 4 groups of 24 cascade hydropower stations used are as Figure 2 shown. The output results of various types of energy in different typical scenarios are as Figure 4 shown. The example considers 2 runoff hydropower stations, 2 adjustable hydropower stations, and 4 groups of cascade hydropower station groups with a total of 24 cascade hydropower stations. After the linearization of the model is completed, a program is written using the YALMIP modeling platform, and the Gurobi 10.0 solver is called in the MATLAB 2023 environment to solve the model. Analyzing Figure 4 the results shows that: 1) In the scenario of new energy output fluctuations, the adjustment of hydropower is mainly used to meet the demand of different load conditions, and at the same time support the consumption of wind power and photovoltaic power, so as to avoid the occurrence of wind abandonment and light abandonment. 2) The conversion of high proportion of hydropower between wet and dry seasons shows obvious seasonal characteristics. Specifically, the wet season mainly appears in summer, and the hydropower output is greater than that in other seasonal typical scenarios at this time. Winter is the dry season, and the hydropower output drops significantly, and the load in the corresponding scenario base drops significantly. To meet the load demand of the whole province, other supporting power sources such as thermal power in the province need to be supplemented. In spring and autumn, the hydropower is in the normal water period, which is sufficient to support the load demand scenario by jointly outputting with wind power and photovoltaic power.

[0090] Please refer to Figure 4 , Figure 4 which is the principle block diagram of a water-wind-solar collaborative dispatch and optimization system for a power system provided by an embodiment of the present invention, as Figure 4 shown. The system includes:

[0091] A first acquisition module 410, configured to acquire the water abandonment penalty cost of hydropower, the light abandonment penalty cost of photovoltaic power, the wind abandonment penalty cost of wind power, and the load shedding penalty cost of the power system at any moment;

[0092] A cost calculation module 420 is configured to determine the total operating cost at any moment according to the water abandonment penalty cost, light abandonment penalty cost, wind abandonment penalty cost, and load shedding penalty cost.

[0093] A second acquisition module 430 is configured to acquire the first operating constraints of wind power, photovoltaic power, and the power system, which are pre-configured, and the second operating constraints of different types of hydropower; wherein, the types of hydropower include run-of-river hydropower, adjustable hydropower, and cascade hydropower.

[0094] An optimization solution module 440 is configured to solve the optimization scheme for the coordinated scheduling of water, wind, and light in the power system when the total operating cost reaches the minimum based on the first operating constraint and the second operating constraint.

[0095] In an optimized system for the coordinated scheduling of water, wind, and light in a power system provided by an embodiment of the present invention, the operating characteristics of photovoltaic power, wind power, and the power system are considered, and the operating characteristics of three different types of hydropower stations, namely run-of-river hydropower stations, adjustable hydropower stations, and cascade hydropower stations, are also considered. On this basis, with the minimum total operating cost at any moment as the optimization goal, the optimization scheme for the coordinated scheduling of water, wind, and light in the power system can be solved. The present invention can more accurately reflect the operating conditions of the actual power system, especially in the case of high-proportion hydropower and large-scale new energy grid connection. By comprehensively considering the operating characteristics of different types of hydropower stations, a more accurate and flexible scheduling strategy can be provided for grid dispatching, the allocation of power resources can be optimized, and the economy and reliability of the power system can be improved.

[0096] In some embodiments, the first acquisition module 410 is specifically configured to: acquire the penalty coefficients, the number of power stations, and the abandonment amounts of hydropower, wind power, and photovoltaic power in the target dispatching area, as well as the load shedding penalty coefficient and the load shedding amount of the power system; calculate the penalty costs of hydropower, wind power, and photovoltaic power respectively according to the penalty coefficients, the number of power stations, and the abandonment amounts of hydropower, wind power, and photovoltaic power; and calculate the load shedding penalty cost of the power system according to the load shedding penalty coefficient and the load shedding amount of the power system.

[0097] In some embodiments, the second operating constraint of the run-of-river hydropower includes the upper and lower limits constraints of the power generation power, the power generation flow constraint, and the ramp constraint; the second operating constraint of the adjustable hydropower includes the upper and lower limits constraints of the power generation power, the power generation flow constraint, the reservoir capacity inequality constraint, the reservoir capacity constraint, and the ramp constraint; the second operating constraint of the cascade hydropower includes the upper and lower limits constraints of the power generation power, the power generation flow constraint, the reservoir capacity inequality constraint, the reservoir capacity constraint, the ramp constraint, the power generation flow constraint of the upstream hydropower, and the time-delay effect constraint of the water flow.

[0098] In some embodiments, the total operating cost at any moment is the sum of the water abandonment penalty cost, the light abandonment penalty cost, the wind abandonment penalty cost, and the load shedding penalty cost.

[0099] An embodiment of the present application also provides an electronic device. The electronic device includes a processor, a memory, a communication interface, and at least one communication bus for connecting the processor, the memory, and the communication interface. The memory includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (PROM), or a compact disc read-only memory (CD-ROM), and the memory is used for storing relevant instructions and data.

[0100] The communication interface is used for receiving and sending data. The processor can be one or more CPUs. When the processor is a single CPU, the CPU can be a single-core CPU or a multi-core CPU. The processor in the electronic device is used to read one or more programs stored in the memory and perform the following operations: obtaining the penalty cost of water abandonment for hydropower, the penalty cost of light abandonment for photovoltaic power, the penalty cost of wind abandonment for wind power, and the penalty cost of load shedding for the power system at any moment; determining the total operating cost at any moment according to the penalty cost of water abandonment, the penalty cost of light abandonment, the penalty cost of wind abandonment, and the penalty cost of load shedding; obtaining the first operating constraints of wind power, photovoltaic power, and the power system and the second operating constraints of different types of hydropower configured in advance; where the types of hydropower include run-of-river hydropower, adjustable hydropower, and cascade hydropower; based on the first operating constraints and the second operating constraints, solving the optimization scheme for the coordinated scheduling of water, wind, and light in the power system when the total operating cost reaches the minimum.

[0101] It should be noted that the specific implementation of each operation can be the corresponding description in the method embodiments described above. The electronic device can be used to execute an optimization method for the coordinated scheduling of water, wind, and light in the power system in the method embodiments of the present application above, and will not be specifically described herein.

[0102] In an embodiment of the present invention, a computer-readable storage medium is further provided. The computer-readable storage medium is a memory device in a computer device and is used to store programs and data. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and, of course, the extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, and the operating system of the terminal is stored in this storage space. Moreover, one or more instructions suitable for being loaded and executed by the processor are also stored in this storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. One or more instructions stored in the computer-readable storage medium can be loaded and executed by the processor to implement the corresponding steps of the method for optimizing the coordinated scheduling of water, wind, and light in a power system in the above embodiment. Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program codes.

[0103] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for optimizing the coordinated dispatch of water, wind and solar power in a power system, characterized in that: include: Obtain the penalty cost of hydropower abandonment, photovoltaic abandonment, wind power abandonment and load loss of the power system at any time; Determine the total operating cost at any time based on the penalty costs for abandoned water, abandoned solar, abandoned wind and lost load; Obtaining pre-configured first operating constraints of wind power, photovoltaic power and electric power systems and second operating constraints of different hydropower types; wherein the hydropower types include run-of-the-river hydropower, adjustable hydropower and cascade hydropower; Based on the first operating constraint and the second operating constraint, the optimization scheme for the coordinated dispatch of water, wind and solar power in the power system is solved when the total operating cost is minimized.

2. According to the method for optimizing the coordinated dispatch of water, wind and solar power in a power system as claimed in claim 1, it is characterized in that: The acquisition of the water abandonment penalty cost of hydropower, the photovoltaic abandonment penalty cost, the wind abandonment penalty cost of wind power and the load loss penalty cost of the power system at any time includes: Obtain the penalty coefficients, number of power stations and abandoned quantities of hydropower, wind power and photovoltaic power in the target dispatching area, as well as the load loss penalty coefficient and load loss quantity of the power system; Calculate the penalty costs of hydropower, wind power and photovoltaic power according to their respective penalty coefficients, number of power stations and abandoned amounts; And, according to the load loss penalty coefficient and load loss amount of the power system, the load loss penalty cost of the power system is calculated.

3. According to the method for optimizing the coordinated dispatch of water, wind and solar power in a power system as claimed in claim 1, it is characterized in that: The second operation constraints of the runoff hydropower include upper and lower limit constraints of power generation, power generation flow constraints and climbing constraints; The second operation constraint of the adjustable hydropower includes upper and lower limit constraints of power generation, power generation flow constraint, reservoir capacity inequality constraint, reservoir capacity constraint and ramp constraint; The second operation constraints of the cascade hydropower include upper and lower limit constraints of power generation, power generation flow constraints, reservoir capacity inequality constraints, reservoir capacity constraints, ramp constraints, power generation flow constraints of upstream hydropower, and time lag effect constraints of water flow.

4. According to the method for optimizing the coordinated dispatch of water, wind and solar power in a power system as claimed in claim 1, it is characterized in that: The total operating cost at any moment is the sum of the water abandonment penalty cost, the solar abandonment penalty cost, the wind abandonment penalty cost and the load loss penalty cost.

5. A water-wind-solar coordinated dispatch optimization system for a power system, characterized in that the system include: The first acquisition module is used to obtain the water abandonment penalty cost of hydropower, the light abandonment penalty cost of photovoltaic power, the wind abandonment penalty cost of wind power and the load loss penalty cost of the power system at any time; The cost calculation module is used to determine the total operating cost at any time based on the water abandonment penalty cost, solar abandonment penalty cost, wind abandonment penalty cost and load loss penalty cost; A second acquisition module is used to acquire pre-configured first operation constraints of wind power, photovoltaic power and electric power systems and second operation constraints of different hydropower types; wherein the hydropower types include runoff hydropower, adjustable hydropower and cascade hydropower; The optimization solution module is used to solve the optimization plan for the coordinated dispatch of water, wind and solar power in the power system when the total operating cost is minimized based on the first operating constraint and the second operating constraint.

6. According to the water-wind-solar coordinated dispatch optimization system for a power system as claimed in claim 5, it is characterized in that: The first acquisition module is specifically used for: Obtain the penalty coefficients, number of power stations and abandoned quantities of hydropower, wind power and photovoltaic power in the target dispatching area, as well as the load loss penalty coefficient and load loss quantity of the power system; Calculate the penalty costs of hydropower, wind power and photovoltaic power according to their respective penalty coefficients, number of power stations and abandoned amounts; And, according to the load loss penalty coefficient and load loss amount of the power system, the load loss penalty cost of the power system is calculated.

7. According to the water-wind-solar coordinated dispatch optimization system of the power system as claimed in claim 5, it is characterized in that: The second operation constraints of the runoff hydropower include upper and lower limit constraints of power generation, power generation flow constraints and climbing constraints; The second operation constraint of the adjustable hydropower includes upper and lower limit constraints of power generation, power generation flow constraint, reservoir capacity inequality constraint, reservoir capacity constraint and ramp constraint; The second operation constraints of the cascade hydropower include upper and lower limit constraints of power generation, power generation flow constraints, reservoir capacity inequality constraints, reservoir capacity constraints, ramp constraints, power generation flow constraints of upstream hydropower, and time lag effect constraints of water flow.

8. According to the water-wind-solar coordinated dispatch optimization system for a power system as claimed in claim 5, it is characterized in that: The total operating cost at any moment is the sum of the water abandonment penalty cost, the solar abandonment penalty cost, the wind abandonment penalty cost and the load loss penalty cost.

9. An electronic device, characterized in that: The electronic device includes a processor, a memory, and a computer program stored in the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of a method for optimizing the coordinated dispatch of water, wind and solar power in a power system as described in any one of claims 1 to 4 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein when the computer program is executed by the processor, the steps of a method for optimizing the coordinated dispatch of water, wind and solar power in a power system as described in any one of claims 1 to 4 are implemented.

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