Security checking method and related device for inter-provincial medium-and-long-term power transaction

Abstract

The invention discloses an inter-provincial medium-and-long-term power transaction security checking method and a related device, and belongs to the field of power system scheduling plans, and the method comprises the steps: obtaining the basic information of a power grid, constructing an inter-provincial transaction path, and based on the checked medium-and-long-term power transaction, determining the security of the inter-provincial transaction path; calculating the maximum power transmission capacity, the used power transmission capacity and the residual power transmission capacity of the power transmission channel; calculating the available power transmission capacity of the power transmission channel in the transaction path based on the residual power transmission capacity according to the composition of the inter-provincial transaction path; calculating the available power transmission capacity of the inter-provincial transaction path based on the available power transmission capacity of the power transmission channel in the transaction path; and according to the relationship between the available power transmission capacity of the inter-provincial transaction path and the power of the to-be-checked or to-be-adjusted medium-and-long-term power transaction, performing security checking on the to-be-checked or to-be-adjusted medium-and-long-term power transaction. According to the invention, quantitative analysis of the whole process of medium-and-long-term electricity transaction checking is realized, and the precision of medium-and-long-term checking is obviously improved.

Description

Technical Field

[0001] The present invention relates to the field of power system dispatching plan, and in particular to a safety verification method and related device for medium- and long-term inter-provincial power transactions. Background Art

[0002] The verification of medium- and long-term electricity transactions is generally organized and carried out by the dispatching center. The power generation and transmission capacity is determined based on the annual operation mode calculation and analysis, stable operation control regulations, etc., and the power and electricity safety verification is carried out on various annual, monthly, and intra-month medium- and long-term physical transactions submitted by the trading institutions to determine whether the transactions exceed the power generation capacity, the available transmission capacity of the transmission section, etc.

[0003] At present, due to the rapid development of the power market, the continuous increase in the installed capacity of new energy, the increasingly complex structure of the power grid, the increasing amount of traded electricity, the increasing rigidity of execution, the imbalance of power generation and the uncertainty of trading results have caused the power grid trend to become increasingly complex and changeable. The power space that the power grid dispatch can use for balancing and adjustment is gradually reduced, the power grid safety margin is reduced, the means of rapid quantitative analysis of the system operation boundary are insufficient, the power feasibility judgment tools are lacking, and the work intensity and difficulty of dispatching and operating personnel are increasing. Therefore, the verification of medium and long-term power transactions is particularly important. However, there are more studies on short-term safety verification in China, and the research and application of medium- and long-term power safety verification are relatively rare. The traditional reliance on manual experience and simple power addition and subtraction to arrange and adjust power plans (trading) is increasingly unsuitable for the complex operation of the power grid. Summary of the invention

[0004] The purpose of the present invention is to provide a method and related devices for safety verification of medium- and long-term inter-provincial electricity transactions, so as to overcome the problems that the verification of traditional medium- and long-term electricity transactions mainly relies on manual experience and simple electricity addition and subtraction verification and adjustment of electricity plans (transactions), lacks an accurate available transmission capacity calculation model, lacks a basis for quantitative analysis of transaction verification and adjustment means.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: A security verification method for medium- and long-term inter-provincial power transactions comprises the following steps: Obtain basic information of the power grid; Based on the basic information of power grid, build inter-provincial trading paths; Based on the verified medium- and long-term power transactions, calculate the maximum transmission capacity, used transmission capacity and remaining transmission capacity of the transmission channel; According to the composition of inter-provincial trading paths, the available transmission capacity of the transmission channel in the trading paths is calculated based on the remaining transmission capacity; Calculate the available transmission capacity of the inter-provincial trading path based on the available transmission capacity of the transmission channel in the trading path; According to the relationship between the available transmission capacity of the inter-provincial transaction path and the electricity of the medium- and long-term electricity transaction to be verified or adjusted, the medium- and long-term electricity transaction to be verified or adjusted is subject to a safety verification.

[0006] Furthermore, the basic information of the power grid includes a power grid model and medium- and long-term power transactions that have passed verification.

[0007] Furthermore, the inter-provincial transaction path includes a number of transaction nodes and transmission channels, and the number of transaction nodes and transmission channels are constructed according to the following principles: (1) The transaction nodes and transmission channels in the power grid model are connected in sequence according to the transmission direction; (2) The transaction path between the same provinces does not pass through the same transaction node repeatedly.

[0008] Furthermore, the calculation of the maximum transmission capacity, used transmission capacity and remaining transmission capacity of the transmission channel based on the verified medium- and long-term power transactions specifically includes: (1) Calculate the maximum transmission capacity of the transmission section using the improved optimal power flow: adjust the objective function of the optimal power flow to the maximum transmission capacity of the transmission channel, and consider the power that has passed the verification in the constraint conditions. The specific calculation method is as follows: The objective function is expressed as follows:

[0009] The constraints include physical power flow equation constraints, load increase constraints and power generation capacity limitation constraints; The physical power flow equation constraints are expressed as follows:

[0010] The load increase constraint is expressed as follows:

[0011] The power generation capacity limitation constraint is expressed as follows:

[0012]

[0013]

[0014] in, and is the active and reactive output of the unit, Maximizing the transmission channel s Active transmission power; and are the active and reactive load demands under maximum transmission conditions, respectively; is the verified medium- and long-term electricity trading power. and are the initial active and reactive load data, and as well as and are the lower and upper limits of the unit’s active and reactive power generation, respectively. is a scalar parameter representing the load increment; is a constant that specifies the rate of load increase; and It is a busbar The voltage amplitude and angle; ; and are the elements of the system admittance matrix; (2) Based on the verified medium- and long-term power transactions and distribution coefficients, calculate the used transmission capacity of the transmission channel. The calculation formula is as follows:

[0015] In the formula, It is a transmission channel s of used transmission capacity, It is a transmission channel s The first i Medium and long-term electricity transactions, It is i The inter-provincial transaction path of the transaction l In the transmission channel s The distribution coefficient on ; (3) Calculate the available transmission capacity of the transmission channel based on the maximum transmission capacity and used transmission capacity of the transmission channel. The calculation formula is as follows:

[0016] In the formula, It is a transmission channel s The remaining transmission capacity, It is a margin factor reserved to cope with temporary fluctuations in load and equipment.

[0017] Furthermore, according to the composition of the inter-provincial transaction path, the available transmission capacity of the transmission channel in the transaction path is calculated based on the remaining transmission capacity, and the calculation formula is as follows:

[0018] In the formula, It is a transmission channel s The remaining transmission capacity, It is a transmission section s In the transaction path l The available transmission capacity in .

[0019] Furthermore, the available transmission capacity of the inter-provincial trading path is calculated based on the available transmission capacity of the transmission channel in the trading path. Specifically, according to the composition of the trading path, the minimum value of the available transmission capacity of each transmission channel in the trading path is the available transmission capacity of the trading path, which is expressed as follows:

[0020] In the formula, Is the transaction path l The available transmission capacity, n is the transaction path l A large number of power transmission channels.

[0021] Furthermore, according to the relationship between the available transmission capacity of the inter-provincial transaction path and the power of the medium- and long-term power transaction to be verified or adjusted, the medium- and long-term power transaction to be verified or adjusted is subjected to safety verification, specifically: If the electricity of the medium- and long-term electricity transaction to be verified or adjusted is greater than the available transmission capacity of the inter-provincial trading path, the medium- and long-term electricity transaction fails the verification and needs to be adjusted before re-verification; if the electricity of the medium- and long-term electricity transaction to be verified or adjusted is not greater than the available transmission capacity of the inter-provincial trading path, it passes the verification.

[0022] A security verification system for medium- and long-term inter-provincial power transactions, comprising: Information acquisition module: used to obtain basic information of the power grid; Transaction path construction module: used to construct inter-provincial transaction paths based on basic power grid information; The first calculation module is used to calculate the maximum transmission capacity, used transmission capacity and remaining transmission capacity of the transmission channel based on the verified medium- and long-term power transactions; The second calculation module is used to calculate the available transmission capacity of the transmission channel in the transaction path based on the composition of the inter-provincial transaction path and the remaining transmission capacity; The third calculation module is used to calculate the available transmission capacity of the inter-provincial transaction path based on the available transmission capacity of the transmission channel in the transaction path; Verification module: used to perform security verification on the medium- and long-term power transactions to be verified or adjusted based on the relationship between the available transmission capacity of the inter-provincial transaction path and the power of the medium- and long-term power transactions to be verified or adjusted.

[0023] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of a method for security verification of medium- and long-term inter-provincial electricity transactions when executing the computer program.

[0024] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a security verification method for inter-provincial medium- and long-term electricity transactions.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects: First of all, the present invention establishes a complete medium- and long-term power transaction verification process, standardizes the medium- and long-term power transaction verification form from the aspects of transaction path construction, maximum transmission capacity calculation, available transmission capacity calculation, etc., and proposes a maximum transmission capacity calculation method based on improved optimal power flow. Based on the medium- and long-term transactions that have been verified, the maximum transmission capacity of the transmission channel is calculated to ensure that the calculation results are consistent with the actual situation. In this way, a complete and executable verification process and quantitative verification method are formed, which provides a standard for the subsequent unified business management and technical support system development.

[0026] Secondly, the present invention proposes a verification method based on the available transmission capacity of the transaction path, and proposes a quantitative calculation method, which can accurately calculate the maximum transmission capacity and available transmission capacity of the transmission channel and the transaction path, and consider the impact of the verified transactions on the existing transmission channel, which greatly improves the efficiency of medium- and long-term power transaction verification. The standardized process plus automatic data access and calculation effectively reduce the working hours of the staff. According to the actual results, the overall efficiency of transaction verification has been improved by more than 400%.

[0027] Finally, the present invention improves the accuracy of medium- and long-term power transaction verification, finely constructs inter-provincial transaction paths, accurately calculates the maximum transmission capacity and available transmission capacity of the transmission section, and accurately calculates the distribution coefficient through the power grid topology. It breaks through the traditional manual calculation mode, realizes quantitative analysis of the entire process of medium- and long-term power transaction verification, and significantly improves the accuracy of medium- and long-term verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 Schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Embodiment 1 See also Figure 1 The present invention provides a method for verifying the safety of medium- and long-term inter-provincial power transactions, comprising the following steps: Obtain basic information of the power grid; Based on the basic information of power grid, build inter-provincial trading paths; Based on the verified medium- and long-term power transactions, calculate the maximum transmission capacity, used transmission capacity and remaining transmission capacity of the transmission channel; According to the composition of inter-provincial trading paths, the available transmission capacity of the transmission channel in the trading paths is calculated based on the remaining transmission capacity; Calculate the available transmission capacity of the inter-provincial trading path based on the available transmission capacity of the transmission channel in the trading path; According to the relationship between the available transmission capacity of the inter-provincial transaction path and the electricity of the medium- and long-term electricity transaction to be verified or adjusted, the medium- and long-term electricity transaction to be verified or adjusted is subject to a safety verification.

[0033] Through sufficient field research, the present invention forms inter-provincial transaction paths according to actual needs and the physical topology of the power grid, considers the operation mode, power outage and maintenance information, and determines the maximum transmission capacity of the transmission channel based on the improved optimal power flow, forming a complete and quantitative calculation process and method of available transmission capacity, and calculating the available transmission capacity of the transaction path through a refined method. Verify the medium- and long-term power transactions between provinces to determine whether the transaction exceeds the limit. By quantitatively solving the available transmission capacity and conducting refined safety verification, the dispatching agency is provided with tools and means to better respond to the challenges brought by the development of the power market, clean energy and power grid.

[0034] Embodiment 2 This embodiment provides a security verification method for inter-provincial medium- and long-term power transactions, comprising the following steps: 1. Obtain basic information, including power grid models, verified medium- and long-term power transactions, etc.

[0035] 2. Construct inter-provincial trading paths. An inter-provincial trading path consists of several trading nodes and transmission channels according to the following principles: (1) The transaction nodes and transmission channels in the power grid model are linked in sequence according to the transmission direction; (2) The same transaction path does not pass through the same transaction node repeatedly.

[0036] 3. Calculate the maximum transmission capacity of the transmission channel. Take the verified medium- and long-term power transactions as the unit output under the current basic state, consider information such as equipment maintenance and operation mode, adjust the objective function of the optimal power flow to the maximum transmission capacity of the transmission channel, consider the verified power in the constraints, and use the improved optimal power flow to calculate the maximum transmission capacity of the transmission channel.

[0037] Objective function:

[0038] The constraints include: (1) Physical flow equation:

[0039] (2) Load increase constraints:

[0040] (3) Power generation capacity limitation:

[0041]

[0042]

[0043] in, and is the active and reactive output of the unit, Maximize transmission section s The active transmission power can be linearly expressed by the active output of the unit; and are the active and reactive load demands under maximum transmission conditions, respectively; is the verified medium- and long-term electricity trading power. and are the initial active and reactive load data. and as well as and They are the lower and upper limits of the unit's active and reactive power generation, respectively. The upper limit of power generation takes into account the impact of maintenance and operating mode. is a scalar parameter representing the load increment; is a constant that specifies the rate of load increase; and It is a busbar The voltage amplitude and angle; ; and are the elements of the system admittance matrix.

[0044] 4. Calculate the used transmission capacity of the transmission channel. Based on the verified medium- and long-term power transactions and distribution coefficients, calculate the used transmission capacity of the transmission channel. The calculation formula is as follows:

[0045] In the formula, It is a transmission channel s of used transmission capacity, It is a transmission channel s The first i Medium and long-term electricity transactions, It is i The inter-provincial transaction path of the transaction l In the transmission channel s The distribution coefficient on the grid can be calculated through the power grid model.

[0046] 5. Calculate the remaining transmission capacity of the transmission channel. According to the maximum transmission capacity and used transmission capacity of the transmission channel, calculate the available transmission capacity of the transmission channel. The calculation formula is as follows:

[0047] In the formula, It is a transmission channel s The remaining transmission capacity, It is a margin factor reserved to cope with temporary fluctuations in load and equipment, and is generally set in advance by the operating personnel.

[0048] 6. Calculate the available transmission capacity of the transmission channel in the transaction path. According to the composition of the transaction path, calculate the available transmission capacity of the transmission section in the transaction path. The calculation formula is as follows:

[0049] In the formula, It is a transmission section s In the transaction path l The available transmission capacity in .

[0050] 7. Calculate the available transmission capacity of the inter-provincial trading path. According to the composition of the trading path, the minimum value of the available transmission capacity of each transmission section in the trading path is the available transmission capacity of the trading path. That is:

[0051] In the formula, Is the transaction path l The available transmission capacity, n is the transaction path l The number of transmission sections.

[0052] 8. Obtain the medium- and long-term power transaction information to be verified or adjusted, including the time period, power, transaction path, etc. of each medium- and long-term transaction. If the transaction fails to pass the verification, the transaction power will be reduced according to the available transmission capacity.

[0053] 9. Carry out safety verification for medium- and long-term power transactions. According to the transaction information of each medium- and long-term transaction, find the corresponding transaction path, compare the power of the medium- and long-term transaction with the available transmission capacity of the inter-provincial transaction path, if the power of the medium- and long-term transaction is greater than the available transmission capacity of the inter-provincial transaction path, the transaction has not passed the verification, and the transaction needs to be adjusted and re-verified; if the transaction power is not greater than the available transmission capacity, it passes the verification.

[0054] Embodiment 3 See also Figure 2 The present invention provides a security verification system for medium- and long-term inter-provincial power transactions, which is characterized by comprising: Information acquisition module: used to obtain basic information of the power grid; Transaction path construction module: used to construct inter-provincial transaction paths based on basic power grid information; The first calculation module is used to calculate the maximum transmission capacity, used transmission capacity and remaining transmission capacity of the transmission channel based on the verified medium- and long-term power transactions; The second calculation module is used to calculate the available transmission capacity of the transmission channel in the transaction path based on the composition of the inter-provincial transaction path and the remaining transmission capacity; The third calculation module is used to calculate the available transmission capacity of the inter-provincial transaction path based on the available transmission capacity of the transmission channel in the transaction path; Verification module: used to perform security verification on the medium- and long-term power transactions to be verified or adjusted based on the relationship between the available transmission capacity of the inter-provincial transaction path and the power of the medium- and long-term power transactions to be verified or adjusted.

[0055] Embodiment 4 The present invention provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the security verification method for inter-provincial medium- and long-term electricity transactions are implemented.

[0056] Embodiment 5 The present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and is characterized in that when the computer program is executed by a processor, the steps of the security verification method for inter-provincial medium- and long-term electricity transactions are implemented.

[0057] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. 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 disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0058] 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 flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, 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 flowchart and / or block diagram. 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.

[0059] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate 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 1A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0060] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A security verification method for medium- and long-term inter-provincial power transactions, characterized in that: The steps include: Obtain basic information of the power grid; Based on the basic information of power grid, build inter-provincial trading paths; Based on the verified medium- and long-term power transactions, calculate the maximum transmission capacity, used transmission capacity and remaining transmission capacity of the transmission channel; According to the composition of inter-provincial trading paths, the available transmission capacity of the transmission channel in the trading paths is calculated based on the remaining transmission capacity; Calculate the available transmission capacity of the inter-provincial trading path based on the available transmission capacity of the transmission channel in the trading path; According to the relationship between the available transmission capacity of the inter-provincial transaction path and the electricity of the medium- and long-term electricity transaction to be verified or adjusted, the medium- and long-term electricity transaction to be verified or adjusted is subject to a safety verification.

2. A security verification method for medium- and long-term inter-provincial power transactions according to claim 1, characterized in that: The basic information of the power grid includes the power grid model and the medium- and long-term power transactions that have passed the verification.

3. A method for security verification of medium- and long-term inter-provincial power transactions according to claim 2, characterized in that: The inter-provincial transaction path includes a number of transaction nodes and transmission channels, and the number of transaction nodes and transmission channels are constructed according to the following principles: (1) The transaction nodes and transmission channels in the power grid model are connected in sequence according to the transmission direction; (2) The transaction path between the same provinces does not pass through the same transaction node repeatedly.

4. A method for security verification of medium- and long-term inter-provincial power transactions according to claim 3, characterized in that: The calculation of the maximum transmission capacity, used transmission capacity and remaining transmission capacity of the transmission channel based on the verified medium- and long-term power transactions specifically includes: (1) Calculate the maximum transmission capacity of the transmission section using the improved optimal power flow: adjust the objective function of the optimal power flow to the maximum transmission capacity of the transmission channel, and consider the power that has passed the verification in the constraint conditions. The specific calculation method is as follows: The objective function is expressed as follows: The constraints include physical power flow equation constraints, load increase constraints and power generation capacity limitation constraints; The physical power flow equation constraints are expressed as follows: The load increase constraint is expressed as follows: The power generation capacity limitation constraint is expressed as follows: in, and is the active and reactive output of the unit, Maximizing the transmission channel s Active transmission power; and are the active and reactive load demands under maximum transmission conditions, respectively; is the verified medium- and long-term electricity trading power. and are the initial active and reactive load data, and as well as and are the lower and upper limits of the unit’s active and reactive power generation, respectively. is a scalar parameter representing the load increment; is a constant that specifies the rate of load increase; and It is a busbar The voltage amplitude and angle; ; and are the elements of the system admittance matrix; (2) Based on the verified medium- and long-term power transactions and distribution coefficients, calculate the used transmission capacity of the transmission channel. The calculation formula is as follows: In the formula, It is a transmission channel s of used transmission capacity, It is a transmission channel s The first i Medium and long-term electricity transactions, It is i The inter-provincial transaction path of the transaction l In the transmission channel s The distribution coefficient on ; (3) Calculate the available transmission capacity of the transmission channel based on the maximum transmission capacity and used transmission capacity of the transmission channel. The calculation formula is as follows: In the formula, It is a transmission channel s The remaining transmission capacity, It is a margin factor reserved to cope with temporary fluctuations in load and equipment.

5. A method for security verification of medium- and long-term inter-provincial power transactions according to claim 1, characterized in that: According to the composition of the inter-provincial transaction path, the available transmission capacity of the transmission channel in the transaction path is calculated based on the remaining transmission capacity. The calculation formula is as follows: In the formula, It is a transmission channel s The remaining transmission capacity, It is a transmission section s In the transaction path l The available transmission capacity in .

6. A method for security verification of medium- and long-term inter-provincial power transactions according to claim 1, characterized in that: The calculation of the available transmission capacity of the inter-provincial trading path based on the available transmission capacity of the transmission channel in the trading path is specifically as follows: according to the composition of the trading path, the minimum value of the available transmission capacity of each transmission channel in the trading path is the available transmission capacity of the trading path, which is expressed as follows: In the formula, Is the transaction path l The available transmission capacity, n is the transaction path l A large number of power transmission channels.

7. A method for security verification of medium- and long-term inter-provincial power transactions according to claim 1, characterized in that: The safety check of the medium- and long-term power transaction to be checked or adjusted is performed according to the relationship between the available transmission capacity of the inter-provincial transaction path and the power of the medium- and long-term power transaction to be checked or adjusted, specifically: If the electricity of the medium- and long-term electricity transaction to be verified or adjusted is greater than the available transmission capacity of the inter-provincial trading path, the medium- and long-term electricity transaction fails the verification and needs to be adjusted before re-verification; if the electricity of the medium- and long-term electricity transaction to be verified or adjusted is not greater than the available transmission capacity of the inter-provincial trading path, it passes the verification.

8. A security verification system for medium- and long-term inter-provincial power transactions, characterized in that: include: Information acquisition module: used to obtain basic information of the power grid; Transaction path construction module: used to construct inter-provincial transaction paths based on basic power grid information; The first calculation module is used to calculate the maximum transmission capacity, used transmission capacity and remaining transmission capacity of the transmission channel based on the verified medium- and long-term power transactions; The second calculation module is used to calculate the available transmission capacity of the transmission channel in the transaction path based on the composition of the inter-provincial transaction path and the remaining transmission capacity; The third calculation module is used to calculate the available transmission capacity of the inter-provincial transaction path based on the available transmission capacity of the transmission channel in the transaction path; Verification module: used to perform security verification on the medium- and long-term power transactions to be verified or adjusted based on the relationship between the available transmission capacity of the inter-provincial transaction path and the power of the medium- and long-term power transactions to be verified or adjusted.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of a security verification method for inter-provincial medium- and long-term electricity transactions as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of a security verification method for inter-provincial medium- and long-term electricity transactions as described in any one of claims 1 to 7 are implemented.

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