Method for large hydropower to participate in inter-provincial market clearing and related system

Abstract

The invention belongs to the technical field of electric power automation, and discloses a large hydropower participation inter-provincial market clearing method and related system.The method comprises the steps that quantity report and quotation data of two electricity selling subjects of a large hydropower station and a thermal power generating unit and a purchaser subject participating in an inter-provincial market are obtained; based on the data, establishing an optimization model with social welfare maximization as a target; constructing constraint conditions of a purchaser main body and an alternating current and direct current tie line by combining physical operation characteristics of a large hydropower station, a power coupling relationship between the hydropower station accessed to the direct current and the tie line, inter-provincial alternating current and direct current operation characteristics and market rules; and obtaining a final clearing result of the seller main body and the purchaser main body through centralized market clearing solution. According to the method, the large-scale hydropower participates in the interprovincial market clearing, so that the requirement of large-scale and large-range consumption of the large-scale hydropower electricity selling main body which is complex in operation characteristic, clean and low-carbon in the interprovincial market is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power automation, and in particular relates to a method for large-scale hydropower to participate in inter-provincial market clearing and a related system. Background Art

[0002] The interprovincial market, once dominated by a single market player, is gradually shifting towards a more diversified, flexible, and low-carbon one. As a clean and renewable energy source, hydropower will become increasingly important in this interprovincial market. Currently, large-scale hydropower participates in the market primarily through prioritized power generation plans and bundled transmission with renewable energy sources. This makes hydropower trading independent of interprovincial market competition and fails to meet the needs of large-scale clean energy consumption and optimized allocation. Furthermore, interprovincial and interregional hydropower is primarily distributed in a cascade pattern, characterized by large scale, complex operational characteristics, and strong temporal coupling. This impacts the transmission power of connected DC interconnectors, undoubtedly increasing the technical difficulty of hydropower's participation in interprovincial market clearing.

[0003] Under the multi-channel centralized bidding transaction mechanism of the inter-provincial electricity market, how to make full use of the cross-provincial and cross-regional power channel resources, improve market operation efficiency, and meet the diversified transaction needs of market players is an important issue in the current optimization and configuration of the electricity market. Unlike thermal power and other power generation forms that can directly declare electricity price curves, large-scale hydropower is affected by factors such as upstream and downstream hydraulic coupling, cascade scheduling, and basin water allocation. When participating in inter-provincial market transactions, it faces multiple restrictions such as grid security constraints, hydropower scheduling and operation constraints, time sequence coupling, and spatial cascade coordination, making it difficult to apply the existing thermal power clearing method. Therefore, the following technical problems need to be solved urgently: How to accurately characterize and incorporate the characteristics of my country's inter-provincial power grid with AC / DC hybrid operation and the current market trading rules into the inter-provincial power market optimization clearing model; how to systematically characterize the special operating constraints of large hydropower stations in time-series operation, such as hydraulic coupling and basin cascade coordinated scheduling, and effectively couple them with the market optimization model; how to design feasible bidding and clearing modeling methods suitable for hydropower companies so that they can fairly participate in the bidding and clearing of the inter-provincial market while meeting the physical constraints of grid security and hydropower operation, and improve the optimal allocation efficiency of power resources. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problem in the above-mentioned existing technology of how to comprehensively consider the spatiotemporal coupling characteristics of hydropower and the grid and market constraints in the inter-provincial electricity market clearing model, and construct an optimization modeling and quotation clearing method suitable for large hydropower, and provide a method and related system for large hydropower to participate in inter-provincial market clearing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a method for large-scale hydropower to participate in inter-provincial market clearing, comprising the following steps: Obtain the quotation data of electricity sales entities and buyers of large hydropower stations and thermal power units participating in inter-provincial market transactions; Based on the quotation data of electricity sellers and buyers of large hydropower stations and thermal power units participating in inter-provincial market transactions, an objective function is constructed to maximize social welfare. Based on the physical operating characteristics of large hydropower stations, the coupling relationship between large hydropower stations connected to DC and the transmission power of DC interconnection lines, the AC and DC operating characteristics of inter-provincial power grids, and inter-provincial market transaction rules, a constraint model for buyers and sellers and AC and DC interconnection lines is constructed. According to the objective function and constraint model, a centralized optimization clearing model for large hydropower participating in the inter-provincial market is established. Based on the centralized optimization clearing model for large hydropower participating in the inter-provincial market, the clearing results of the two types of electricity sellers and buyers, large hydropower stations and thermal power units, are obtained.

[0006] A further improvement of the present invention is that the quotation data of two types of electricity selling entities, large hydropower stations and thermal power units, and purchasing entities participating in inter-provincial market transactions are obtained, including the declared electricity prices of the electricity selling entities and the electricity purchasing entities at different times, the cleared electricity of the hydropower selling entity of each purchase and sale pair at each moment on the transaction path, the cleared electricity of the thermal power selling entity of each purchase and sale pair at each moment on the transaction path, and the transmission fees and network losses that the purchasing entity needs to bear for purchasing electricity on the transaction path at each moment.

[0007] A further improvement of the present invention is that, based on the quoted quantity and quotation data of two types of electricity sellers, large hydropower stations and thermal power units, and buyers participating in inter-provincial market transactions, a specific method for constructing an objective function with the goal of maximizing social welfare is as follows:

[0008]

[0009] in, Indicates the trading period. Indicates the purchasing entity A collection of Indicates the transaction path A collection of Indicates hydropower station A collection of Indicates thermal power unit A collection of Indicates hydropower station At the moment The declared electricity price, Indicates thermal power unit At the moment The declared electricity price, Indicates the purchasing entity At the moment The declared electricity price, of which hydropower and thermal power are collectively referred to as the seller entity , Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the seller entities such as hydropower, Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the thermal power sellers, Indicates the purchasing entity At the moment In the transaction path The power purchaser needs to bear the transmission fee and network loss. Indicates the purchasing entity At the moment of cleared electricity, Indicates the transmission channel A collection of Indicates the transmission channel The price, Indicates the transmission channel The network loss coefficient, Indicates the transmission channel A collection of Indicates the transmission channel The network loss coefficient.

[0010] A further improvement of the present invention lies in that, in the step of constructing a constraint model of relevant seller entities and AC / DC interconnection lines based on the physical operating characteristics of large hydropower stations, the coupling relationship between large hydropower stations connected to DC and the transmission power of DC interconnection lines, the AC / DC operating characteristics of my country's inter-provincial power grids, and inter-provincial market trading rules, the constraint model includes large hydropower station operating constraints including single-period attributes, time coupling type, and spatial coupling type, coordinated operation constraints of DC interconnection lines and hydropower stations, available transmission capacity ATC constraints of AC / DC interconnection lines, and power clearing constraints of buyers and sellers.

[0011] A further improvement of the present invention is that, among the large hydropower station operation constraints including single-period attributes, time coupling type, and space coupling type, the single-period attribute constraints include: Upper and lower limit constraints on hydropower unit output:

[0012] in, For hydropower stations Recycled hydropower units In the period The upper limit of power generation output, For hydropower stations Recycled hydropower units In the period The lower limit of power generation output; Hydropower output vibration zone constraints:

[0013] in, For hydropower stations Medium unit The allowed operating area The power limit of each output range, For hydropower stations Medium unit The allowed operating area The lower power limit of each output range; Minimum hydropower startup output constraints:

[0014] in, For hydropower stations In the period Minimum startup output; Time-coupled constraints include: Hydropower station output ramp constraints:

[0015] in, For hydropower stations Maximum output increase or decrease limits in adjacent time periods; Constraints on hydropower station output fluctuation limits:

[0016] in, For hydropower stations Minimum interval time for output increase or decrease; Spatial coupling constraints include: Constraints on total output of hydropower stations in regional power grids:

[0017] in, For the entire regional power grid The total output limit of the hydropower station is For the entire regional power grid The lower limit of the total output of the hydropower station; Upper and lower limits of hydropower station output:

[0018] in, represents the hydropower station group {H1, H2, H3, ..., Hm}, Represents a hydropower station group The output limit, Represents a hydropower station group The lower output limit.

[0019] A further improvement of the present invention is that the coordinated operation constraints of the DC tie line and the hydropower station include:

[0020] in, For if, For the period DC tie lines Operating power; For hydropower stations Time of efforts, To access the DC All hydropower stations in the period Total output; For power stations The output limit, For power stations The lower limit of output; To access the DC The upper limit of the difference between the output of all hydropower stations and the current DC operating power, To access the DC The lower limit of the difference between the output of all hydropower stations and the current DC operating power.

[0021] A further improvement of the present invention is that the available transmission capacity (ATC) constraints of the AC / DC interconnection lines and the power clearing constraints of the buyers and sellers include: Available transmission capacity (ATC) constraints of AC / DC tie lines:

[0022]

[0023] in, Indicates electricity sales entity A collection of Indicates Passing through the transmission channel at any time The maximum power flow limit; Indicates Passing through the transmission channel at any time The trend; Indicates that each buying and selling pair In the transaction path Previous time The cleared electricity of the selling entity; Indicates the transaction path Through the transmission channel The direction of the current; Indicates the transaction path Through the transmission channel The network loss discount factor; Indicates that the transaction path is not considered when network loss is not considered. Transmission channel passing through The power flow distribution factor of the AC channel is , For virtual power generation / load node to send / receive end AC section The equivalent sensitivity coefficient, It is the AC section between the internet-connected / grounded end point and the sending / receiving end of the cross-regional DC transmission channel. Sensitivity coefficient of Constraints on electricity clearing by the seller:

[0024]

[0025] in, Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the seller entities such as hydropower, Indicates hydropower station In the period The declared electricity Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the thermal power sellers, Indicates thermal power In the period Declared electricity; Constraints on electricity clearing by the purchasing entity:

[0026] in, Indicates the transmission channel A collection of Indicates the transmission channel The network loss coefficient, Indicates the purchasing entity exist Report electricity purchase demand at any time.

[0027] In a second aspect, the present invention provides a system for large-scale hydropower participating in inter-provincial market clearing, comprising: The data acquisition module obtains the quotation data of large hydropower stations and thermal power units, two types of electricity sellers and buyers participating in inter-provincial market transactions; The objective function construction module constructs an objective function with the goal of maximizing social welfare based on the quotation data of electricity sellers and buyers of large hydropower stations and thermal power units participating in inter-provincial market transactions; The constraint model construction module is used to construct the constraint model of the buyer and seller and the AC and DC interconnection lines based on the physical operating characteristics of large hydropower stations, the coupling relationship between large hydropower stations connected to DC and the transmission power of DC interconnection lines, the AC and DC operating characteristics of inter-provincial power grids, and inter-provincial market transaction rules; The data processing module is used to establish a centralized optimization clearing model for large-scale hydropower participating in the inter-provincial market based on the objective function and constraint model. Based on the centralized optimization clearing model for large-scale hydropower participating in the inter-provincial market, the clearing results of the two types of electricity sellers, large hydropower stations and thermal power units, as well as the purchasing entities are obtained.

[0028] A further improvement of the present invention is that the data acquisition module is used to acquire the following data: It includes the electricity prices declared by electricity sellers and electricity buyers at different times, the electricity cleared by hydropower sellers at each moment on the transaction path for each purchase and sale pair, the electricity cleared by thermal power sellers at each moment on the transaction path for each purchase and sale pair, and the transmission fees and network losses that buyers need to bear for purchasing electricity on the transaction path at each moment.

[0029] A further improvement of the present invention is that the function of the objective function building module is realized by the following method:

[0030]

[0031] in, Indicates the trading period. Indicates the purchasing entity A collection of Indicates the transaction path A collection of Indicates hydropower station A collection of Indicates thermal power unit A collection of Indicates hydropower station At the moment The declared electricity price, Indicates thermal power unit At the moment The declared electricity price, Indicates the purchasing entity At the moment The declared electricity price, of which hydropower and thermal power are collectively referred to as the seller entity , Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the seller entities such as hydropower, Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the thermal power sellers, Indicates the purchasing entity At the moment In the transaction path The power purchaser needs to bear the transmission fee and network loss. Indicates the purchasing entity At the moment of cleared electricity, Indicates the transmission channel A collection of Indicates the transmission channel The price, Indicates the transmission channel The network loss coefficient, Indicates the transmission channel A collection of Indicates the transmission channel The network loss coefficient.

[0032] A further improvement of the present invention is that the function of the constraint model construction module is used to construct the following constraint model: It includes operation constraints of large hydropower stations with single-period attributes, time coupling type, and space coupling type, coordinated operation constraints of DC interconnection lines and hydropower stations, available transmission capacity (ATC) constraints of AC / DC interconnection lines, and power clearing constraints of buyers and sellers.

[0033] In a third aspect, the present invention provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the steps of a method for large-scale hydropower to participate in inter-provincial market clearing.

[0034] In a fourth aspect, the present invention provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for large-scale hydropower to participate in inter-provincial market clearing.

[0035] Compared with the prior art, the present invention has the following beneficial effects: The technical solution provided by the present invention constructs operating constraints for large hydropower stations and coordinated operating constraints for DC interconnection lines and hydropower stations based on the physical operating characteristics of large hydropower stations and the coupling relationship between large hydropower stations connected to DC and the transmission power of DC interconnection lines. These constraints are taken into account in the currently existing multi-channel centralized bidding transactions in the inter-provincial market, helping large hydropower, a type of electricity seller with complex operating characteristics and clean and low-carbon electricity, to carry out large-scale and wide-range consumption in the inter-provincial market, which is of great significance to serving the realization of dual carbon goals and promoting the construction of a national unified power market. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a flow chart of the present invention; Figure 2 is a system diagram of the present invention; Figure 3 This is a system diagram of Example 5. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0038] Example 1: See also Figure 1 A method for large-scale hydropower to participate in inter-provincial market clearing includes the following steps: S1, obtain the quotation data of two types of electricity sellers, large hydropower stations and thermal power units, as well as the purchasing entities participating in inter-provincial market transactions.

[0039] S2, based on the quotation data of two types of electricity sellers, large hydropower stations and thermal power units, as well as the quotation data of buyers participating in inter-provincial market transactions, construct an objective function with the goal of maximizing social welfare.

[0040] S3. Based on the physical operating characteristics of large hydropower stations, the coupling relationship between hydropower stations connected to DC and the transmission power of DC interconnection lines, the AC and DC operating characteristics of my country's inter-provincial power grids, and inter-provincial market trading rules, a constraint model for buyers and sellers and AC and DC interconnection lines is constructed.

[0041] S4. Based on the objective function and constraint model, a centralized optimization clearing model for large-scale hydropower participating in the inter-provincial market is established. Based on the centralized optimization clearing model for large-scale hydropower participating in the inter-provincial market, the clearing results of the two types of electricity sellers, large hydropower stations and thermal power units, as well as the purchasing entities are obtained.

[0042] Example 2: See also Figure 2 , a system for large hydropower to participate in inter-provincial market clearing, including: The data acquisition module is used to obtain the quotation data of two types of electricity sellers, large hydropower stations and thermal power units, as well as the purchasing entities participating in inter-provincial market transactions; The objective function construction module is used to construct an objective function with the goal of maximizing social welfare based on the quotation data of two types of electricity sellers, large hydropower stations and thermal power units, as well as buyers participating in inter-provincial market transactions. The constraint model construction module is used to construct the constraint model of the buyer and seller and the AC / DC interconnection line based on the physical operating characteristics of large hydropower stations, the coupling relationship between the hydropower stations connected to DC and the transmission power of the DC interconnection line, the AC / DC operating characteristics of my country's inter-provincial power grid, and the inter-provincial market transaction rules; The data processing module establishes a centralized optimization clearing model for large hydropower participating in the inter-provincial market based on the objective function and constraint model. Based on this model, the clearing results of the two types of electricity sellers, large hydropower stations and thermal power units, as well as the purchasing entities are obtained.

[0043] Example 3: This embodiment further illustrates the method of S2 and the functions of the objective function building module based on the above embodiment, as follows: The objective function is based on the quantity and price information declared by the buyer and seller, taking into account the remaining available transmission capacity (ATC) of the transmission channel, the channel transmission fee, and the network loss, with the goal of maximizing social welfare. The formula is as follows: (1) (2) Where, Indicates the trading period. Indicates the purchasing entity A collection of Indicates the transaction path A collection of Indicates hydropower station A collection of Indicates thermal power unit A collection of Indicates hydropower station At the moment The declared electricity price, Indicates thermal power unit At the moment The declared electricity price, Indicates the purchasing entity At the moment The declared electricity price, of which hydropower and thermal power are collectively referred to as the seller entity , Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the seller entities such as hydropower, Indicates that each buying and selling pair In the transaction path Previous time The electricity sold by thermal power generation entities, Indicates the purchasing entity At the moment In the transaction path The power purchaser needs to bear the transmission fee and network loss. Indicates the purchasing entity At the moment of cleared electricity, Indicates the transmission channel A collection of Indicates the transmission channel The price, Indicates the transmission channel The network loss coefficient, Indicates the transmission channel A collection of Indicates the transmission channel The network loss coefficient.

[0044] Example 4: This embodiment further illustrates the method of S3 and the functions of the constraint model building module based on the above embodiment, as follows: 1. Operational constraints of large hydropower stations Single-period attribute constraints: a. Upper and lower limits of hydropower unit output (3) Where, 、 For hydropower stations Recycled hydropower units In the period The upper and lower limits of power generation output.

[0045] b. Hydropower output vibration zone constraints (4) Where, 、 For hydropower stations Medium unit The allowed operating area The upper and lower power limits of each output range.

[0046] c. Minimum hydropower startup output constraints (5) Where, For hydropower stations In the period The minimum startup output, that is, the output is greater than the minimum startup output or is 0.

[0047] Time-coupled constraints: a. Hydropower station output ramp constraints (6) Where, For hydropower stations The maximum output increase or decrease limit in adjacent time periods.

[0048] b. Constraints on hydropower station output fluctuations (7) Where, For hydropower stations The minimum interval between output increase and decrease, that is, the highest and lowest points in a round of output increase and decrease must last for at least period of time.

[0049] Spatial coupling constraints: a. Constraints on total hydropower station output in regional power grids (8) Where, 、 For the entire regional power grid The upper and lower limits of the total output of the hydropower station.

[0050] b. Upper and lower limits on hydropower station output Since the power generation of the downstream hydropower station of a cascade hydropower station depends on the outflow of the upstream hydropower station, the output constraint of the cascade hydropower station group in the basin needs to be considered from the perspective of the hydropower station group. The hydropower station group in a cascade basin can be combined into multiple sub-cascade power station groups including the leading power station. If there is There are three hydropower stations, namely the leading hydropower station H1 and the downstream hydropower stations H2, H3, ..., Hm. The cascade hydropower stations in the entire basin are composed of The hydropower station group consists of: {H1}, {H1, H2}, {H1, H2, H3}, {H1, H2, H3, ..., Hm}. The upper and lower limit constraints of the hydropower station group output can be expressed as: (9) Where, represents the hydropower station group {H1, H2, H3, ..., Hm}, 、 Represents a hydropower station group The upper and lower limits of output.

[0051] 2. Constraints on coordinated operation of DC interconnection lines and hydropower stations Some large cascade hydropower stations are directly connected to cross-regional DC interconnection lines. Since the DC line transmission power has upper and lower limits and cannot be adjusted frequently, in order to ensure the safe and stable operation of the power grid, it is necessary to consider the coupling relationship between the hydropower station connected to the DC and the DC interconnection line transmission power. It is generally expressed as the power range of the associated hydropower station and the DC interconnection line, that is, when the DC is connected Power Station contribution In the range When the DC Total output of hydropower stations and current DC operating power The difference needs to fall within the corresponding range .

[0052] (10) Where, For if, For the period DC tie lines Operating power; For hydropower stations Time of efforts, To access the DC All hydropower stations in the period Total output; 、 Power stations Output upper and lower limits; 、 Connect to the DC The upper and lower limits of the difference between the output of all hydropower stations and the current DC operating power.

[0053] 3. Available Transmission Capacity (ATC) Constraints on AC / DC Tie Lines (11) (12) Where, Indicates electricity sales entity A collection of Indicates Passing through the transmission channel at any time The maximum power flow limit; Indicates Passing through the transmission channel at any time The trend; Indicates that each buying and selling pair In the transaction path Previous time The cleared electricity of the selling entity; Indicates the transaction path Through the transmission channel The tidal current direction is 1, which indicates the positive direction and -1, which indicates the negative direction. Indicates the transaction path Through the transmission channel The network loss discount factor; Indicates that the transaction path is not considered when network loss is not considered. Transmission channel passing through The power flow distribution factor of the AC channel is , For virtual power generation / load node to send / receive end AC section The equivalent sensitivity coefficient, It is the AC section between the internet-connected / grounded end point and the sending / receiving end of the cross-regional DC transmission channel. The sensitivity coefficient of the DC channel is 1 or -1.

[0054] 4. Constraints on electricity clearing by sellers (13) (14) Where, Indicates hydropower station In the period The declared electricity Indicates thermal power In the period The declared electricity.

[0055] 5. Constraints on electricity clearing by the purchasing entity (15) Where, Indicates the purchasing entity exist Report electricity purchase demand at any time.

[0056] The present invention proposes a method for large-scale hydropower to participate in inter-provincial market clearing. Combining the coupling characteristics of the time-series operation of cascade hydropower and the special complexity of spatial cascade operation, the method considers the single-period attributes, time coupling type, spatial coupling type and other large hydropower station operation constraints, as well as the coordinated operation constraints of DC interconnection lines and hydropower stations in the existing inter-provincial multi-channel centralized optimization clearing model. It effectively solves the computational difficulty of inter-provincial market clearing caused by complex physical boundary conditions such as the three-dimensional power generation dynamic characteristics of large hydropower stations and the non-convex nonlinear water level and storage capacity relationship, as well as the problem of safe operation of DC channels due to the uncertainty of hydropower station power generation output. It gives full play to the power transmission capacity of cross-provincial and cross-regional AC and DC channels, effectively promotes the complementary resource advantages and optimal allocation of clean and low-carbon energy such as hydropower on a large scale, promotes large-scale consumption of clean energy, effectively avoids resource waste, and helps implement the dual carbon goals.

[0057] This embodiment effectively realizes the coordinated operation between cascade hydropower and thermal power, satisfies the grid transmission constraints, avoids grid safety hazards, and reasonably allocates power load and market entity clearing through precise parameter calculations, thus providing data support for actual operations.

[0058] Example 5: See also Figure 3 As shown, the present invention also provides an electronic device 100 for a method of large-scale hydropower participating in inter-provincial market clearing; the electronic device 100 includes a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and executable on the at least one processor 102, and at least one communication bus 104.

[0059] The memory 101 can be used to store the computer program 103. The processor 102 implements the steps of the method for large-scale hydropower participating in inter-provincial market clearing described in Example 1 by running or executing the computer program stored in the memory 101 and calling the data stored in the memory 101. The memory 101 can mainly include a program storage area and a data storage area. The program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data (such as audio data) created based on the use of the electronic device 100. In addition, the memory 101 can include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device.

[0060] The at least one processor 102 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 102 may be a microprocessor or any conventional processor, etc. The processor 102 is the control center of the electronic device 100 and connects various parts of the entire electronic device 100 using various interfaces and lines.

[0061] The memory 101 in the electronic device 100 stores a plurality of instructions to implement a method for large-scale hydropower to participate in inter-provincial market clearing. The processor 102 can execute the plurality of instructions to implement: Obtain the quotation data of electricity sales entities and buyers of large hydropower stations and thermal power units participating in inter-provincial market transactions; Based on the quotation data of electricity sellers and buyers of large hydropower stations and thermal power units participating in inter-provincial market transactions, an objective function is constructed to maximize social welfare. Based on the physical operating characteristics of large hydropower stations, the coupling relationship between large hydropower stations connected to DC and the transmission power of DC interconnection lines, the AC and DC operating characteristics of inter-provincial power grids, and inter-provincial market transaction rules, a constraint model for buyers and sellers and AC and DC interconnection lines is constructed. According to the objective function and constraint model, a centralized optimization clearing model for large hydropower participating in the inter-provincial market is established. Based on the centralized optimization clearing model for large hydropower participating in the inter-provincial market, the clearing results of the two types of electricity sellers and buyers, large hydropower stations and thermal power units, are obtained.

[0062] Example 6: If the module / unit integrated in the electronic device 100 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory and read-only memory (ROM, Read-Only Memory).

[0063] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0065] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A method for large-scale hydropower to participate in inter-provincial market clearing, characterized by: The following steps are involved: Obtain the quotation data of electricity sales entities and buyers of large hydropower stations and thermal power units participating in inter-provincial market transactions; Based on the quotation data of electricity sellers and buyers of large hydropower stations and thermal power units participating in inter-provincial market transactions, an objective function is constructed to maximize social welfare. Based on the physical operating characteristics of large hydropower stations, the coupling relationship between large hydropower stations connected to DC and the transmission power of DC interconnection lines, the AC and DC operating characteristics of inter-provincial power grids, and inter-provincial market transaction rules, a constraint model for buyers and sellers and AC and DC interconnection lines is constructed. According to the objective function and constraint model, a centralized optimization clearing model for large hydropower participating in the inter-provincial market is established. Based on the centralized optimization clearing model for large hydropower participating in the inter-provincial market, the clearing results of the two types of electricity sellers and buyers, large hydropower stations and thermal power units, are obtained.

2. A method for clearing large-scale hydropower participating in inter-provincial markets according to claim 1, characterized in that: The data on the quantity and quotation of two types of electricity sellers, large hydropower stations and thermal power units, and buyers participating in inter-provincial market transactions include: the electricity prices declared by the electricity sellers and buyers at different times, the cleared electricity of the hydropower seller at each moment on the transaction path for each purchase and sale pair, the cleared electricity of the thermal power seller at each moment on the transaction path for each purchase and sale pair, and the transmission fees and network losses that the buyers need to bear for purchasing electricity on the transaction path at each moment.

3. A method for clearing large-scale hydropower participating in inter-provincial markets according to claim 1, characterized in that: Based on the quotation data of electricity sellers and buyers of large hydropower stations and thermal power units participating in inter-provincial market transactions, the specific method for constructing an objective function with the goal of maximizing social welfare is as follows: in, Indicates the trading period. Indicates the purchasing entity A collection of Indicates the transaction path A collection of Indicates hydropower station A collection of Indicates thermal power unit A collection of Indicates hydropower station At the moment The declared electricity price, Indicates thermal power unit At the moment The declared electricity price, Indicates the purchasing entity At the moment The declared electricity price, of which hydropower and thermal power are collectively referred to as the seller entity , Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the seller entities such as hydropower, Indicates that each buying and selling pair In the transaction path Previous time The electricity sold by thermal power generation entities, Indicates the purchasing entity At the moment In the transaction path The power purchaser needs to bear the transmission fee and network loss. Indicates the purchasing entity At the moment of cleared electricity, Indicates the transmission channel A collection of Indicates the transmission channel The price, Indicates the transmission channel The network loss coefficient, Indicates the transmission channel A collection of Indicates the transmission channel The network loss coefficient.

4. A method for clearing inter-provincial markets for large-scale hydropower according to claim 1, characterized in that: In the step of constructing a constraint model of buyers and sellers and AC / DC interconnection lines based on the physical operating characteristics of large hydropower stations, the coupling relationship between large hydropower stations connected to DC and the transmission power of DC interconnection lines, the AC / DC operating characteristics of inter-provincial power grids, and inter-provincial market trading rules, the constraint model includes large hydropower station operation constraints including single-period attributes, time coupling type, and spatial coupling type, coordinated operation constraints of DC interconnection lines and hydropower stations, available transmission capacity ATC constraints of AC / DC interconnection lines, and power clearing constraints of buyers and sellers.

5. A method for clearing inter-provincial markets for large-scale hydropower according to claim 4, characterized in that: The operational constraints of large hydropower stations include single-period attributes, time-coupled type, and space-coupled type. The single-period attribute constraints include: Upper and lower limit constraints on hydropower unit output: in, For hydropower stations Recycled hydropower units In the period The upper limit of power generation output, For hydropower stations Recycled hydropower units In the period The lower limit of power generation output; Hydropower output vibration zone constraints: in, For hydropower stations Medium unit The allowed operating area The power limit of each output range, For hydropower stations Medium unit The allowed operating area The lower power limit of each output range; Minimum hydropower startup output constraints: in, For hydropower stations In the period Minimum startup output; Time-coupled constraints include: Hydropower station output ramp constraints: in, For hydropower stations Maximum output increase or decrease limits in adjacent time periods; Constraints on hydropower station output fluctuation limits: in, For hydropower stations Minimum interval time for output increase or decrease; Spatial coupling constraints include: Constraints on total output of hydropower stations in regional power grids: in, For the entire regional power grid The total output limit of the hydropower station is For the entire regional power grid The lower limit of the total output of the hydropower station; Upper and lower limits of hydropower station output: in, represents the hydropower station group {H1, H2, H3, ..., Hm}, Represents a hydropower station group The output limit, Represents a hydropower station group The lower output limit.

6. A method for clearing large-scale hydropower participating in inter-provincial markets according to claim 4, characterized in that: The constraints on the coordinated operation of DC tie lines and hydropower stations include: in, For if, For the period DC tie lines Operating power; For hydropower stations Time of effort, To access the DC All hydropower stations in the period Total output; For power stations The output limit, For power stations The lower limit of output; To access the DC The upper limit of the difference between the output of all hydropower stations and the current DC operating power, To access the DC The lower limit of the difference between the output of all hydropower stations and the current DC operating power.

7. A method for clearing inter-provincial markets for large-scale hydropower according to claim 4, characterized in that: The available transmission capacity (ATC) constraints of AC / DC interconnection lines and the power clearing constraints of buyers and sellers include: Available transmission capacity (ATC) constraints of AC / DC tie lines: in, Indicates electricity sales entity A collection of Indicates Passing through the transmission channel at any time The maximum power flow limit; Indicates Passing through the transmission channel at any time The trend; Indicates that each buying and selling pair In the transaction path Previous time The cleared electricity of the selling entity; Indicates the transaction path Through the transmission channel The direction of the current; Indicates the transaction path Through the transmission channel The network loss discount factor; Indicates that the transaction path is not considered when network loss is not considered. Transmission channel passing through The power flow distribution factor of the AC channel is , For virtual power generation / load node to send / receive end AC section The equivalent sensitivity coefficient, It is the AC section between the internet-connected / grounded end point and the sending / receiving end of the cross-regional DC transmission channel. Sensitivity coefficient of Constraints on electricity clearing by the seller: in, Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the seller entities such as hydropower, Indicates hydropower station In the period The declared electricity Indicates that each buying and selling pair In the transaction path Previous time The electricity sold by thermal power generation entities, Indicates thermal power In the period Declared electricity; Constraints on electricity clearing by the purchasing entity: in, Indicates the transmission channel A collection of Indicates the transmission channel The network loss coefficient, Indicates the purchasing entity exist Report electricity purchase demand at any time.

8. A large-scale hydropower participating in the inter-provincial market clearing system, characterized by: include: The data acquisition module is used to obtain the quotation data of two types of electricity sellers, large hydropower stations and thermal power units, as well as the purchasing entities participating in inter-provincial market transactions; The objective function construction module is used to construct an objective function with the goal of maximizing social welfare based on the quotation data of two types of electricity sellers, large hydropower stations and thermal power units, as well as the quotation data of buyers participating in inter-provincial market transactions; The constraint model construction module is used to construct the constraint model of the buyer and seller and the AC and DC interconnection lines based on the physical operating characteristics of large hydropower stations, the coupling relationship between large hydropower stations connected to DC and the transmission power of DC interconnection lines, the AC and DC operating characteristics of inter-provincial power grids, and inter-provincial market transaction rules; The data processing module is used to establish a centralized optimization clearing model for large-scale hydropower participating in the inter-provincial market based on the objective function and constraint model. Based on the centralized optimization clearing model for large-scale hydropower participating in the inter-provincial market, the clearing results of the two types of electricity sellers, large hydropower stations and thermal power units, as well as the purchasing entities are obtained.

9. A large-scale hydropower participating in inter-provincial market clearing system according to claim 8, characterized in that: The data acquisition module is used to obtain the following data: It includes the electricity prices declared by electricity sellers and electricity buyers at different times, the electricity cleared by hydropower sellers at each moment on the transaction path for each purchase and sale pair, the electricity cleared by thermal power sellers at each moment on the transaction path for each purchase and sale pair, and the transmission fees and network losses that buyers need to bear for purchasing electricity on the transaction path at each moment.

10. A large-scale hydropower participating in inter-provincial market clearing system according to claim 8, characterized in that: The functionality of the objective function building block is implemented through the following methods: in, Indicates the trading period. Indicates the purchasing entity A collection of Indicates the transaction path A collection of Indicates hydropower station A collection of Indicates thermal power unit A collection of Indicates hydropower station At the moment The declared electricity price, Indicates thermal power unit At the moment The declared electricity price, Indicates the purchasing entity At the moment The declared electricity price, of which hydropower and thermal power are collectively referred to as the seller entity , Indicates that each buying and selling pair In the transaction path Previous time The electricity cleared by the seller entities such as hydropower, Indicates that each buying and selling pair In the transaction path Previous time The electricity sold by thermal power generation entities, Indicates the purchasing entity At the moment In the transaction path The power purchaser needs to bear the transmission fee and network loss. Indicates the purchasing entity At the moment of cleared electricity, Indicates the transmission channel A collection of Indicates the transmission channel The price, Indicates the transmission channel The network loss coefficient, Indicates the transmission channel A collection of Indicates the transmission channel The network loss coefficient.

11. A large-scale hydropower participating in inter-provincial market clearing system according to claim 8, characterized in that: The functions of the constraint model building block are used to build the following constraint models: It includes operation constraints of large hydropower stations with single-period attributes, time coupling type, and space coupling type, coordinated operation constraints of DC interconnection lines and hydropower stations, available transmission capacity (ATC) constraints of AC / DC interconnection lines, and power clearing constraints of buyers and sellers.

12. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the processor implements the steps of a method for large-scale hydropower participating in inter-provincial market clearing according to any one of claims 1 to 7.

13. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a method for large-scale hydropower participating in inter-provincial market clearing according to any one of claims 1 to 7 are implemented.

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