Regional power system planning optimization method and system considering outgoing power demand

Abstract

The invention discloses a regional power system planning optimization method and system considering an outgoing power demand. The method comprises the following steps: calculating the power surplus of a research sending-end regional power system; determining the power delivery scale of the researched power system in the sending end area; determining a delivery power demand according to the power delivery scale of the researched sending-end regional power system, and constructing a regional power system planning model considering the delivery power demand in combination with the total cost of the system and the cross-regional delivery power benefit; and solving a target function in the regional power system planning model under the constraint condition by taking minimization of the total cost of the system and maximization of contribution of power delivery to a receiving-end power grid as targets to obtain a regional power system planning scheme. According to the method, the local power demand and the outgoing power demand are comprehensively considered in the development planning optimization of the power system in the receiving end region, and the method is beneficial to promoting the contact and mutual aid of the multi-region power system under the dual-carbon background.

Description

Technical Field

[0001] The present invention relates to the technology of regional power planning, and particularly to a method, system, device and storage medium for optimizing the regional power system planning considering the power transmission demand. Background Art

[0002] Expanding the interconnection of power grids has been fully proven to be able to improve the consumption capacity of clean energy, realize the complementary and mutual assistance and optimal allocation of clean energy on a larger scale, and improve the power supply reliability and the safety and stability level of the power system. For important power sending ends, the proportion of power transmission is high and the scale is large. The regional power system planning needs to consider the local power demand and the power transmission demand as a whole. On the one hand, the existing research on regional power system planning generally exogenously assumes the power transmission scale in a target year, without overall coordination with the regional power surplus level, the transmission capacity of transmission channels, etc. Therefore, it is impossible to accurately consider the local power demand and the power transmission demand as a whole, which limits the application value of related technologies in practice; on the other hand, with the rapid development of new energy, the power transmission is gradually dominated by a high proportion of new energy, and the economic and environmental benefits in replacing the fossil energy power generation of the receiving-end power system have not been taken into account. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide a method, system, device and storage medium for optimizing the regional power system planning considering the power transmission demand. This solution comprehensively considers the local power demand and the power transmission demand in the development planning and optimization of the receiving-end regional power system.

[0004] Technical Solution: A method for optimizing the regional power system planning considering the power transmission demand of the present invention includes:

[0005] Calculating the power surplus of the studied sending-end regional power system;

[0006] Determining the power transmission scale of the studied sending-end regional power system according to the power surplus of the studied sending-end regional power system, the planned received power curve of the receiving-end power system, and the transmission capacity constraint of the inter-regional transmission channel;

[0007] Determining the power transmission demand according to the power transmission scale of the studied sending-end regional power system, and constructing a regional power system planning model considering the power transmission demand by combining the total system cost and the cross-regional power transmission benefit;

[0008] Input the input parameters into the regional power system planning model, input various constraint conditions into the regional power system planning model, and constrain the objective function in the regional power system planning model; aiming to minimize the total system cost and maximize the contribution of power transmission to the receiving-end power grid, solve the objective function in the regional power system planning model under the constraint conditions to obtain the regional power system planning scheme.

[0009] Further, the expression for the power surplus of the studied sending-end regional power system is as follows:

[0010] P s = P OC + P SC + P CUR - P OH - p SH - P LD

[0011] In the formula, P s is the power surplus of the studied sending-end regional power system; p OC is the sum of the operating capacities of various power sources in the studied sending-end regional power system; p SC is the sum of the shutdown capacities of various power sources in the studied sending-end regional power system; P CUR is the amount of abandoned new energy; P OH is the capacity of blocked operation; P SH is the capacity of blocked shutdown; P LD is the local power demand of the studied sending-end regional power system.

[0012] Further, determine the power transmission scale of the studied sending-end regional power system according to the power surplus of the studied sending-end regional power system, the planned power receiving curve of the receiving-end power system, and the transmission capacity constraints of the inter-regional transmission channels, including:

[0013] Compare the power surplus of the studied sending-end regional power system with the planned power receiving curve of the receiving-end power system and take the smaller value;

[0014] Adjust and determine the final power transmission scale according to the transmission capacity constraints of the inter-regional transmission channels.

[0015] Further, the expression for the objective function of the regional power system planning model is as follows:

[0016] min CB total = C total + B cortrans

[0017] In the formula, C total is the total system cost; B cortrans is the benefit of cross-regional power transmission.

[0018] Further, the total system cost C total has the following expression:

[0019] C total = C ren + C con + C oper + C trans

[0020] In the formula, C ren and C con are respectively the annualized cost of new energy power generation and the annualized cost of conventional power sources; C oper is the annual operating cost; C trans is the transmission cost of the power transmission channel for external transmission.

[0021] Further, the benefit B of the cross - regional power transmission cortrans has the following expression:

[0022] B cortrans = Q cortrans c cortrans

[0023] In the formula, B cortrans is the benefit of cross - regional power transmission; Q cortrans is the total amount of externally transmitted power cumulatively delivered by the system throughout the year; c cortrans is the benefit per unit of externally transmitted power.

[0024] Further, the total system cost includes the annualized cost of new energy power generation, the annualized cost of conventional power sources, the annual operating cost, and the transmission cost of the power transmission channel for external transmission;

[0025] The contribution of the power transmission to the receiving - end power grid is calculated and quantitatively characterized based on the total cost saved by the equivalent replacement of thermal power in the receiving - end power grid by the new energy transmitted from the sending - end power grid.

[0026] Based on the same inventive concept, a regional power system planning and optimization system considering the demand for externally transmitted power according to the present invention includes:

[0027] A power surplus calculation module, configured to calculate the power surplus of the studied sending - end regional power system;

[0028] A power transmission scale determination module, configured to determine the power transmission scale of the studied sending - end regional power system according to the power surplus of the studied sending - end regional power system, the planned received power curve of the receiving - end power system, and the transmission capacity constraint of the inter - regional power transmission channel;

[0029] A model construction module, configured to determine the power transmission demand according to the power transmission scale of the power system in the sending end area under study, and construct a regional power system planning model considering the power transmission demand by combining the total system cost and the cross-regional power transmission benefit;

[0030] A model solving module, configured to input the input parameters into the regional power system planning model, input each constraint condition into the regional power system planning model, and constrain the objective function in the regional power system planning model; aiming to minimize the total system cost and maximize the contribution of power transmission to the receiving-end power grid, solve the objective function in the regional power system planning model under the constraint conditions, and obtain the regional power system planning scheme.

[0031] Based on the same inventive concept, a regional power system planning optimization device considering power transmission demand of the present invention is characterized by including a processor and a memory, wherein computer instructions are stored in the memory, and the processor is configured to execute the computer instructions stored in the memory. When the computer instructions are executed by the processor, the electronic device realizes the steps of the above-mentioned regional power system planning optimization method considering power transmission demand.

[0032] Based on the same inventive concept, a computer-readable storage medium of the present invention stores a computer program thereon. When the program is executed by a processor, the steps of the above-mentioned regional power system planning optimization method considering power transmission demand are realized.

[0033] Advantageous effects: Compared with the prior art, the remarkable technical effects of the present invention are as follows:

[0034] In the development planning and optimization of the receiving-end regional power system, the present invention comprehensively considers the local power demand and the power transmission demand, and takes into account the economic and environmental benefits of the fossil energy power generation of the replaced receiving-end power system. It has better application value for the power system planning in areas rich in clean resources under the background of carbon peaking and carbon neutrality, and the connection and mutual assistance planning of multi-regional power systems. Description of the Drawings

[0035] Figure 1 is a schematic flowchart of a regional power system planning optimization method considering power transmission demand disclosed in an embodiment of the present invention;

[0036] Figure 2 is a schematic structural diagram of a regional power system planning optimization system considering power transmission demand disclosed in an embodiment of the present invention;

[0037] Figure 3 is a schematic structural diagram of a regional power system planning optimization device considering power transmission demand disclosed in an embodiment of the present invention. Detailed Embodiments

[0038] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art will understand that the objectives and advantages achievable by the present invention are not limited to the specific beneficial effects described above, and the above and other objectives achievable by the present invention will be more clearly understood from the following detailed description.

[0039] Those of ordinary skill in the art should understand that the various exemplary components, systems, and methods described in connection with the embodiments disclosed in the present invention can be implemented in hardware, software, or a combination of both. Specifically, whether to execute in the form of hardware or software depends on the specific application and design and technical conditions of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0040] The mention of "embodiment" in the present invention means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0041] Embodiment 1

[0042] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of a method for optimizing the regional power system planning considering the external power transmission demand disclosed in an embodiment of the present invention. Among them, Figure 1 The described method for optimizing the regional power system planning is applied to the power system, such as for regional power planning, etc., which is not limited in the embodiments of the present invention. As Figure 1 shown, the method for optimizing the regional power system planning considering the external power transmission demand may include the following operations:

[0043] S1. Calculate the power surplus of the studied power system at the sending end region.

[0044] In this embodiment, the expression of the power surplus of the studied power system at the sending end region is as follows:

[0045] P s = P OC + P SC + P CUR - P OH - P SH - P LD

[0046] In the formula, P s is the power surplus of the studied power system at the sending end region; POC is the sum of the starting capacities of various power sources in the power system of the sending-end area under study; P SC is the sum of the shutdown capacities of various power sources in the power system of the sending-end area under study; P CUR is the amount of abandoned new energy power; P OH is the starting blocked capacity; P SH is the shutdown blocked capacity; P LD is the local power demand of the power system in the sending-end area under study.

[0047] S2. Determine the power export scale of the power system in the sending-end area under study according to the power surplus of the power system in the sending-end area under study, the planned power receiving curve of the receiving-end power system, the transmission capacity constraints of the inter-regional transmission channels, etc. Specifically as follows:

[0048] Compare the power surplus of the power system in the sending-end area under study with the planned power receiving curve of the receiving-end power system, and take the smaller value;

[0049] Adjust and determine the final power export scale according to the transmission capacity constraints of the inter-regional transmission channels.

[0050] S3. Determine the power export demand according to the power export scale of the power system in the sending-end area under study, and construct a regional power system planning model considering the power export demand by combining the total system cost and the cross-regional power export benefit.

[0051] In this embodiment, the expression of the objective function of the regional power system planning model is as follows:

[0052] min CB total = C total + B cortrans

[0053] In the formula, C total is the total system cost; B cortrans is the cross-regional power export benefit.

[0054] Among them, the expression of the total system cost C total is as follows:

[0055] C total = C ren + C con + C oper + C trans

[0056] In the formula, C ren and C con are the annualized costs of new energy power generation and conventional power sources respectively, which are composed of power source investment costs, operation and maintenance costs, fuel costs, and emission costs; C oper is the annual operation cost; C transIt is the transmission cost of the external power delivery channel.

[0057] The benefit B of cross-regional external power delivery cortrans The expression is as follows:

[0058] B cortrans = Q cortrans c cortrans

[0059] In the formula, B cortrans is the benefit of cross-regional external power delivery; Q cortrans is the total annual external power delivery volume cumulatively delivered by the system; c cortrans is the benefit per unit of external power delivery. Assuming that the external power delivery equivalently replaces the thermal power of the receiving-end power system, the average thermal power supply cost of the receiving-end power system is used to calculate the benefit of cross-regional external power delivery, which is equivalent to reducing the power supply cost of this value for the receiving-end system. It can also be measured using indicators such as the comprehensive electricity price.

[0060] S4. Input the input parameters into the regional power system planning model, input each constraint condition into the regional power system planning model, and constrain the objective function in the regional power system planning model; aiming at minimizing the total system cost and maximizing the contribution of power external delivery to the receiving-end power grid, solve the objective function in the regional power system planning model under the constraint conditions to obtain the regional power system planning scheme.

[0061] The input parameters include the technical, economic, and emission parameters of conventional power sources, the technical, economic, and emission parameters of new energy sources, the technical, economic, and transmission parameters of power transmission channels, and other technical cost parameters, etc., which are specifically related to the implementation example system.

[0062] The constraint conditions include the constraint of the exploitable potential of resources, the constraint of the transmission capacity of the channel section, the power balance constraint, the upper and lower limits of the unit output constraint, etc., which are specifically related to the implementation example system.

[0063] The output results include various economic indicators such as the installed capacity of various power sources and the total system cost, the technical indicators of power external delivery, the benefit of external power delivery, etc., which are specifically related to the research objectives.

[0064] Embodiment 2

[0065] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of a regional power system planning and optimization system considering external power delivery demand disclosed in an embodiment of the present invention. This system can realize regional power planning and specifically includes:

[0066] A power surplus calculation module, which is used to calculate the power surplus of the studied sending-end regional power system;

[0067] The power transmission scale determination module is used to determine the power transmission scale of the studied sending-end regional power system according to the power surplus of the sending-end regional power system, the planned power receiving curve of the receiving-end power system, and the transmission capacity constraints of the inter-regional transmission channels;

[0068] The model construction module is used to determine the power transmission demand according to the power transmission scale of the studied sending-end regional power system, and construct a regional power system planning model considering the power transmission demand by combining the total system cost and the cross-regional power transmission benefit;

[0069] The model solution module is used to input the input parameters into the regional power system planning model, input the various constraint conditions into the regional power system planning model, and constrain the objective function in the regional power system planning model; aiming at minimizing the total system cost and maximizing the contribution of power transmission to the receiving-end power grid, solve the objective function in the regional power system planning model under the constraint conditions to obtain the regional power system planning scheme.

[0070] In an optional embodiment, the regional power system planning optimization method considering the power transmission demand includes: a) calculating the power surplus of the studied sending-end regional power system; b) determining the power transmission scale of the studied sending-end regional power system according to the power surplus of the studied sending-end regional power system, the planned power receiving curve of the receiving-end power system, and the transmission capacity constraints of the inter-regional transmission channels; c) determining the power transmission demand according to the power transmission scale of the studied sending-end regional power system, and constructing a regional power system planning model considering the power transmission demand by combining the total system cost and the cross-regional power transmission benefit; d) aiming at minimizing the total system cost and maximizing the contribution of power transmission to the receiving-end power grid, solve the objective function in the regional power system planning model under the constraint conditions to obtain the regional power system planning scheme.

[0071] Embodiment 3

[0072] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a regional power system planning optimization device disclosed in an embodiment of the present invention. Among them, Figure 3 the described device can be applied to the power system, such as for regional power planning, etc., and the embodiments of the present invention do not make limitations.

[0073] As Figure 3 shown, the device may include a processor and a memory. Computer instructions are stored in the memory, and the processor is used to execute the computer instructions stored in the memory. When the computer instructions are executed by the processor, the electronic device implements the steps of the method as described in the above embodiment and can achieve the same technical effects as the above method.

[0074] The memory may include computer system readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The device may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the memory may be used for reading from and writing to a non-removable, non-volatile magnetic medium (commonly referred to as a "hard disk drive"). A program / utility having a set (at least one) of program modules may be stored in, for example, the memory. Such program modules include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. The program modules generally execute the functions and / or methods in the embodiments described in the present invention.

[0075] The processor executes various functional applications and data processing by running the programs stored in the memory, such as implementing the method provided in Embodiment 1 of the present invention.

[0076] Embodiment 4

[0077] Embodiment 4 of the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the steps of the method described in the above embodiments and can achieve the same technical effects as the above method.

[0078] The computer storage medium of the embodiments of the present invention may adopt any combination of one or more computer-readable media. The computer-readable media may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage medium include: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0079] A computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device.

[0080] The program code contained on a computer-readable medium can be transmitted with any appropriate medium, including but not limited to wireless, wire, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0081] The computer program code for performing the operations of the present invention can be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, by using an Internet service provider to connect through the Internet).

[0082] Of course, a storage medium containing computer-executable instructions provided by an embodiment of the present invention, the computer-executable instructions are not limited to the method operations as above, and can also execute related operations in the methods provided by any embodiment of the present invention.

[0083] 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 are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A regional power system planning and optimization method considering the demand for delivered electricity, characterized in that Including: Calculating the power surplus of the power system in the studied sending-end area; Determining the power transmission scale of the power system in the studied sending-end area according to the power surplus of the power system in the studied sending-end area, the planned power receiving curve of the receiving-end power system, and the transmission capacity constraint of the inter-regional transmission channel; Determining the power transmission demand according to the power transmission scale of the power system in the studied sending-end area, and constructing a regional power system planning model considering the power transmission demand by combining the total system cost and the cross-regional power transmission benefit; Inputting the input parameters into the regional power system planning model, inputting various constraint conditions into the regional power system planning model, and constraining the objective function in the regional power system planning model; Taking the minimization of the total system cost and the maximization of the contribution of power transmission to the receiving-end power grid as the objectives, solving the objective function in the regional power system planning model under the constraint conditions to obtain the regional power system planning scheme.

2. The regional power system planning optimization method considering the external power delivery demand according to claim 1, characterized in that The expression of the power surplus of the power system in the studied sending-end area is as follows: P s = P OC + P SC + P CUR - P OH - P SH - P LD Where, P s is the power surplus of the power system in the sending-end area under study; P OC is the sum of the on-grid capacities of various power sources in the power system of the sending-end area under study; P SC is the sum of the off-grid capacities of various power sources in the power system of the sending-end area under study; P CUR is the amount of new energy wasted; P OH is the capacity of on-grid units affected by constraints; P SH is the capacity of off-grid units affected by constraints; P LD is the local power demand of the power system in the sending-end area under study.

3. The regional power system planning optimization method considering the off-site power demand according to claim 1, wherein Determining the power transmission scale of the power system in the studied sending-end area according to the power surplus of the power system in the studied sending-end area, the planned power receiving curve of the receiving-end power system, and the transmission capacity constraint of the inter-regional transmission channel, including: Comparing the power surplus of the power system in the studied sending-end area with the planned power receiving curve of the receiving-end power system and taking the smaller value; Adjusting and determining the final power transmission scale according to the transmission capacity constraint of the inter-regional transmission channel.

4. The regional power system planning optimization method considering the off-site power demand according to claim 1, characterized in that The expression of the objective function of the regional power system planning model is as follows: min CB total = C total + B cortrans Where C total is the total system cost; B cortrans is the benefit of cross-regional power transmission.

5. The regional power system planning optimization method considering off-site power demand according to claim 4, characterized in that The total cost C of the system total has the following expression: C total = C ren + C con + C oper + C trans where C ren and C con are the annualized costs of new energy power generation and conventional power sources respectively; C oper is the annual operating cost; C trans is the transmission cost of the power transmission channel.

6. The regional power system planning optimization method considering the off-site power demand according to claim 4, characterized in that The cross-regional power transmission benefit B cortrans has the following expression: B cortrans = Q cortrans c cortrans Where B cortrans is the cross-regional power transmission benefit; Q cortrans is the total annual system transmitted power; c cortrans is the benefit per unit of transmitted power.

7. The regional power system planning optimization method considering off-site power demand according to claim 1, characterized in that: The total system cost includes the annualized cost of new energy power generation, the annualized cost of conventional power sources, the annual operation cost, and the power transmission cost of the transmission channel; The contribution of power transmission to the receiving-end power grid is calculated and quantitatively characterized according to the total cost saved by the equivalent substitution of thermal power in the receiving-end power grid by the new energy transmitted by the sending-end power grid.

8. A regional power system planning and optimization system considering off-site power delivery demand, characterized in that, Including: A power surplus calculation module for calculating the power surplus of the power system in the studied sending-end area; A power transmission scale determination module for determining the power transmission scale of the power system in the studied sending-end area according to the power surplus of the power system in the studied sending-end area, the planned power receiving curve of the receiving-end power system, and the transmission capacity constraint of the inter-regional transmission channel; A model construction module for determining the power transmission demand according to the power transmission scale of the power system in the studied sending-end area, and constructing a regional power system planning model considering the power transmission demand by combining the total system cost and the cross-regional power transmission benefit; A model solving module for inputting the input parameters into the regional power system planning model, inputting various constraint conditions into the regional power system planning model, and constraining the objective function in the regional power system planning model; Taking the minimization of the total system cost and the maximization of the contribution of power transmission to the receiving-end power grid as the objectives, solving the objective function in the regional power system planning model under the constraint conditions to obtain the regional power system planning scheme.

9. An optimized device for regional power system planning considering off-site power demand, characterized in that, It includes a processor and a memory. Computer instructions are stored in the memory, and the processor is configured to execute the computer instructions stored in the memory. When the computer instructions are executed by the processor, the electronic device implements the steps of the method for optimizing the regional power system planning considering the power transmission demand as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for optimizing the regional power system planning considering the power transmission demand as described in any one of claims 1 to 7.

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