Method and device for selecting power transmission network scheme, computer device and storage medium

Abstract

The application relates to a power transmission network scheme selection method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: determining a plurality of power transmission network pre-selection schemes, and acquiring power transmission network data corresponding to each power transmission network pre-selection scheme; calculating an adaptability index value of each power transmission network pre-selection scheme according to the power transmission network data in each power transmission network pre-selection scheme; calculating an evaluation score of each power transmission network pre-selection scheme according to the adaptability index value of each power transmission network pre-selection scheme; and taking the power transmission network pre-selection scheme with the maximum evaluation score as a target power transmission network scheme. The method can improve the stability of the power transmission system of the corresponding new energy station.

Description

Technical Field

[0001] This application relates to the field of power transmission network technology, and in particular to a method, apparatus, computer equipment, and storage medium for selecting a power transmission network scheme. Background Technology

[0002] With the increasing integration of renewable energy power plants into high-voltage transmission systems, and the growing number of voltage levels and DC landing points (including conventional and flexible DC transmissions), the development and planning of transmission networks must fully consider various influencing factors. Current technologies typically use adaptability indicators to determine the quality of transmission networks and select appropriate network solutions for renewable energy power plant systems. However, the limited variety of adaptability indicators in existing technologies leads to inaccurate selection of transmission network solutions, resulting in lower stability of the corresponding transmission systems. Summary of the Invention

[0003] Therefore, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for selecting power transmission network schemes to address the above-mentioned technical problems.

[0004] Firstly, this application provides a method for selecting a power transmission network scheme. The method includes:

[0005] Multiple pre-selected transmission network schemes are determined, and the corresponding transmission network data for each pre-selected transmission network scheme is obtained. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line.

[0006] Based on the transmission network data in each pre-selected transmission network scheme, calculate the adaptability index value for each pre-selected transmission network scheme;

[0007] Based on the adaptability index value of each pre-selected transmission network scheme, the evaluation score of each pre-selected transmission network scheme is calculated; the pre-selected transmission network scheme with the highest evaluation score is selected as the target transmission network scheme.

[0008] In one embodiment, the adaptability index value includes a safety adaptability index value; the adaptability index value of each transmission network pre-selection scheme is calculated based on the transmission network data in each transmission network pre-selection scheme, including:

[0009] Based on the predicted load rate of each transmission line in the first AC voltage transmission line in each pre-selected transmission network scheme and the number of first AC voltage transmission lines, calculate the average predicted load rate of the first AC voltage transmission line in each pre-selected transmission network scheme.

[0010] Based on the predicted load rate of each AC voltage transmission line in each pre-selected transmission network scheme and the number of second AC voltage transmission lines, calculate the average predicted load rate of the second AC voltage transmission line in each pre-selected transmission network scheme.

[0011] Based on the predicted load factor of each DC transmission line and the number of DC transmission lines in each pre-selected transmission network scheme, calculate the average predicted load factor of DC transmission lines in each pre-selected transmission network scheme.

[0012] Based on the average predicted load factor of the first AC voltage transmission line, the average predicted load factor of the second AC voltage transmission line, the average predicted load factor of the DC transmission line in each pre-selected transmission network scheme, and the corresponding transmission network data for each pre-selected transmission network scheme, calculate the safety adaptability index value for each pre-selected transmission network scheme.

[0013] In one embodiment, the adaptability index value includes an efficiency adaptability index value; the adaptability index value for each transmission network pre-selection scheme is calculated based on the transmission network data in each transmission network pre-selection scheme, including:

[0014] Obtain the predicted annual utilization duration of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line in each pre-selected transmission network scheme;

[0015] Based on the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines in each pre-selected transmission network scheme, and the predicted annual utilization duration of each transmission line in the first AC voltage transmission line, the second AC voltage transmission line, and the DC transmission line in each pre-selected transmission network scheme, calculate the efficiency adaptability index value of each pre-selected transmission network scheme.

[0016] In one embodiment, the adaptability index value includes a fault adaptability index value; the adaptability index value of each transmission network pre-selection scheme is calculated based on the transmission network data in each transmission network pre-selection scheme, including:

[0017] The frequency of occurrence of preset faults in each pre-selected transmission network scheme is used as the first fault value of the corresponding pre-selected transmission network scheme.

[0018] The first reference value of the first AC voltage transmission line when a preset fault occurs in each of the pre-selected schemes of the transmission network is used as the second fault value of the corresponding preset fault. The first reference value is used to characterize the number of first AC voltage transmission lines in which the active power flow exceeds the first power limit.

[0019] The second reference value of the first AC voltage transmission line when a preset fault occurs in each of the pre-selected schemes of the transmission network is used as the third fault value of the corresponding preset fault. The second reference value is used to characterize the number of second AC voltage transmission lines in which the active power flow exceeds the second power limit.

[0020] The third reference value of the DC transmission line when a preset fault occurs in each of the pre-selected schemes of the transmission network is used as the fourth fault value of the corresponding preset fault. The third reference value is used to characterize the number of DC transmission lines in which the active power flow exceeds the third power limit.

[0021] Based on the first fault value, the second fault value, the third fault value, and the fourth fault value when a preset fault occurs in each pre-selected transmission network scheme, and the transmission network data of each pre-selected transmission network scheme including the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, calculate the fault adaptability index value of each pre-selected transmission network scheme.

[0022] In one embodiment, the adaptability index value includes a source-load adaptability index value; the adaptability index value of each transmission network pre-selection scheme is calculated based on the transmission network data in each transmission network pre-selection scheme, including:

[0023] The number of non-new energy generators in each pre-selected transmission network scheme is taken as the first value of the corresponding pre-selected transmission network scheme.

[0024] Determine the second and third values ​​for each non-new energy generator in each pre-selected scheme of the transmission network. The second value is used to characterize the average power loss of the corresponding non-new energy generator during the line congestion process, and the third value is used to characterize the line congestion duration of the corresponding non-new energy generator.

[0025] Based on the first, second, and third values ​​of each pre-selected transmission network scheme, calculate the source-load adaptability index value for each pre-selected transmission network scheme.

[0026] In one embodiment, the adaptability index value includes a renewable energy consumption adaptability index value; based on the transmission network data in each transmission network pre-selection scheme, the adaptability index value of each transmission network pre-selection scheme is calculated, including:

[0027] Determine the number of new energy power plants in each pre-selected transmission network scheme, and determine the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme;

[0028] Based on the number of new energy power plants in each pre-selected transmission network scheme, and the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme, the new energy absorption adaptability index value of each pre-selected transmission network scheme is calculated.

[0029] In one embodiment, the adaptability index value includes a regulation capacity adaptability index value; the adaptability index value of each transmission network pre-selection scheme is calculated based on the transmission network data in each transmission network pre-selection scheme, including:

[0030] From each pre-selected transmission network scheme, a predetermined number of transmission network operation scenarios are determined, and the operating time of each transmission network operation scenario is determined;

[0031] Determine the number of adjustable power generators in each transmission network operation scenario within each pre-selected transmission network scheme, and determine the upper limit and lower limit of the total adjustable power of each adjustable power generator in each transmission network operation scenario;

[0032] Based on the operating time of each transmission network operation scenario in each pre-selected transmission network scheme, the number of adjustable power generators in each transmission network operation scenario, and the upper and lower limits of the adjustable power of each adjustable power generator, the adjustment capacity adaptability index value of each pre-selected transmission network scheme is calculated.

[0033] Secondly, this application also provides a power transmission network scheme selection device. The device includes:

[0034] The determination module is used to determine multiple pre-selected transmission network schemes and obtain the corresponding transmission network data for each pre-selected transmission network scheme. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line and each transmission line in the DC transmission line.

[0035] The first calculation module is used to calculate the adaptability index value of each transmission network pre-selection scheme based on the transmission network data in each transmission network pre-selection scheme;

[0036] The second calculation module is used to calculate the evaluation score of each pre-selected transmission network scheme based on the adaptability index value of each scheme; and to select the pre-selected transmission network scheme with the highest evaluation score as the target transmission network scheme.

[0037] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0038] Multiple pre-selected transmission network schemes are determined, and the corresponding transmission network data for each pre-selected transmission network scheme is obtained. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line.

[0039] Based on the transmission network data in each pre-selected transmission network scheme, calculate the adaptability index value for each pre-selected transmission network scheme;

[0040] Based on the adaptability index value of each pre-selected transmission network scheme, the evaluation score of each pre-selected transmission network scheme is calculated; the pre-selected transmission network scheme with the highest evaluation score is selected as the target transmission network scheme.

[0041] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0042] Multiple pre-selected transmission network schemes are determined, and the corresponding transmission network data for each pre-selected transmission network scheme is obtained. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line.

[0043] Based on the transmission network data in each pre-selected transmission network scheme, calculate the adaptability index value for each pre-selected transmission network scheme;

[0044] Based on the adaptability index value of each pre-selected transmission network scheme, the evaluation score of each pre-selected transmission network scheme is calculated; the pre-selected transmission network scheme with the highest evaluation score is selected as the target transmission network scheme.

[0045] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0046] Multiple pre-selected transmission network schemes are determined, and the corresponding transmission network data for each pre-selected transmission network scheme is obtained. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line.

[0047] Based on the transmission network data in each pre-selected transmission network scheme, calculate the adaptability index value for each pre-selected transmission network scheme;

[0048] Based on the adaptability index value of each pre-selected transmission network scheme, the evaluation score of each pre-selected transmission network scheme is calculated; the pre-selected transmission network scheme with the highest evaluation score is selected as the target transmission network scheme.

[0049] The aforementioned method, apparatus, computer equipment, storage medium, and computer program product for selecting power transmission network schemes determine multiple pre-selected power transmission network schemes and acquire corresponding power transmission network data for each pre-selected scheme. This data includes the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, as well as the predicted load factor for each of the first AC voltage transmission lines, the second AC voltage transmission lines, and the DC transmission lines. Based on the power transmission network data for each pre-selected scheme, an adaptability index value is calculated for each scheme. Based on the adaptability index value, an evaluation score is calculated for each pre-selected scheme. The pre-selected scheme with the highest evaluation score is selected as the target power transmission network scheme. This process selects the pre-selected scheme with the highest evaluation score from among multiple schemes as the access power transmission network scheme for the target renewable energy power station, thereby improving the accuracy of power transmission network selection and ultimately enhancing the stability of the power transmission system for the corresponding renewable energy power station. Attached Figure Description

[0050] Figure 1 This is an application environment diagram of a power transmission network scheme selection method in one embodiment;

[0051] Figure 2 This is a flowchart illustrating a method for selecting a power transmission network scheme in one embodiment;

[0052] Figure 3 This is a flowchart illustrating the method for selecting a power transmission network scheme in another embodiment;

[0053] Figure 4 This is a structural block diagram of a power transmission network scheme selection device in one embodiment;

[0054] Figure 5 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0056] The method for selecting power transmission network schemes provided in this application embodiment can be applied to, for example, Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104, or it can be located in the cloud or on other network servers. Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. Server 104 can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0057] In one embodiment, such as Figure 2 As shown, a method for selecting a power transmission network scheme is provided, which is then applied to... Figure 1 Taking the terminal in the example, the explanation includes the following steps:

[0058] 201. Determine multiple pre-selected transmission network schemes and obtain the corresponding transmission network data for each pre-selected transmission network scheme. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line and each transmission line in the DC transmission line.

[0059] 202. Based on the transmission network data in each pre-selected transmission network scheme, calculate the adaptability index value of each pre-selected transmission network scheme;

[0060] 203. Calculate the evaluation score for each pre-selected transmission network scheme based on its adaptability index value;

[0061] 204. The pre-selected transmission network scheme with the highest evaluation score shall be taken as the target transmission network scheme.

[0062] Determining multiple preliminary transmission network schemes includes: acquiring annual operational data for the transmission networks of multiple renewable energy power plants within a preset timeframe. This annual operational data includes load information, generator information, and equipment information for the renewable energy power plants. A transmission network planning scheme library is then constructed based on this annual operational data. For example, if the preset timeframe is 2019-2021, the annual operational data would include annual load information, annual generator information, and annual equipment information for the renewable energy power plants for each year from 2019 to 2021.

[0063] The load information of the power transmission network in the annual operation basic data includes the number of first AC voltage transmission lines, second AC voltage transmission lines and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line and each transmission line in the DC transmission line. In this invention, the predicted load rate refers to the predicted load rate of the power transmission network each year, which is obtained by averaging the actual load rate of each year within a preset period.

[0064] Each transmission network planning scheme in the planning scheme library includes corresponding transmission network data. This data includes the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, as well as the predicted load factor for each of the first AC voltage transmission lines, each of the second AC voltage transmission lines, and each of the DC transmission lines. At least two transmission network planning schemes are selected from the planning scheme library as preliminary transmission network options.

[0065] In this case, the AC voltage in the first AC voltage transmission line is the same as the AC voltage in the second AC voltage transmission line. For example, the AC voltage in the first AC voltage transmission line is 500kV, and the AC voltage in the second AC voltage transmission line is 220kV.

[0066] The predicted load factor for each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line of each pre-selected transmission network scheme is calculated based on the annual load data of the transmission network in the corresponding pre-selected transmission network scheme.

[0067] The adaptive index values ​​include various types of adaptive index values, and each type of adaptive index value corresponds to one adaptive index.

[0068] This embodiment uses six types of adaptability index values ​​and k (k is an integer not less than 2) transmission network pre-selection schemes as an example for illustration. The j-th adaptability index value of the i-th transmission network pre-selection scheme is λ.i,j , where \(i\in\{1,2,3,4,5,6\}\), \(1\leq j\leq k\) and \(j\) is an integer; correspondingly, according to the adaptability index value of each preliminary selection scheme of the transmission network, calculate the evaluation score of each preliminary selection scheme of the transmission network, including:

[0069] According to each adaptability index value of each preliminary selection scheme of the transmission network, calculate the weight of each adaptability index. The formula for calculating the weight of each adaptability index is shown in Equation (1);

[0070]

[0071] In Equation (1), \(\omega\) i is the weight of the \(i\)th adaptability index, \(1\leq j\leq k\) and \(j\) is an integer, \(\lambda\) i,j is the \(j\)th adaptability index value of the \(i\)th preliminary selection scheme of the transmission network, \(k\) is an integer not less than 2, and \(i\in\{1,2,3,4,5,6\}\).

[0072] According to the weight of each adaptability index and each adaptability index value of each preliminary selection scheme of the transmission network, calculate the positive reference distance and negative reference distance of each preliminary selection scheme of the transmission network.

[0073] Among them, the formula for calculating the positive reference distance of each preliminary selection scheme of the transmission network is shown in Equation (2);

[0074]

[0075] In Equation (2), \(\lambda\) i，max =\(\max\{\lambda\) i,1 ,\(\lambda\) i,2 ,\(\cdots,\lambda\) i,k \}\), \(\lambda\) i，max is the maximum value among the \(k\) \(i\)th adaptability index values of the preliminary selection schemes of the transmission network, is the positive reference distance of the \(j\)th preliminary selection scheme of the transmission network, \(\lambda\) i,j is the \(j\)th adaptability index value of the \(i\)th preliminary selection scheme of the transmission network.

[0076] The formula for calculating the negative reference distance of each preliminary selection scheme of the transmission network is shown in Equation (3);

[0077]

[0078] In Equation (3), \(\lambda\) i,min =\(\min\{\lambda\) i,1 ,\(\lambda\) i,2 ,\(\cdots,\lambda\) i,k \}\), \(\lambda\) i,min is the minimum value among the \(k\) \(i\)th adaptability index values of the preliminary selection schemes of the transmission network, Let λ be the negative reference distance for the j-th pre-selected transmission network scheme. i,j Let be the value of the j-th adaptability index for the i-th pre-selected transmission network scheme.

[0079] Based on the positive and negative reference distances of each transmission network pre-selection scheme, the evaluation score of each transmission network pre-selection scheme is calculated as shown in formula (4).

[0080]

[0081] In formula (4), r j Let be the evaluation score of the j-th pre-selected transmission network scheme. Let j be the negative reference distance of the pre-selected transmission network scheme. This is the positive reference distance for the j-th pre-selected transmission network scheme.

[0082] Specifically, the evaluation score of each pre-selected transmission network scheme can be calculated using the above formulas (1)-(4). The pre-selected transmission network scheme with the highest evaluation score is taken as the target transmission network scheme for the target new energy power station, and the target transmission network scheme is used as the transmission network scheme for the target new energy power station to access.

[0083] The method provided in this invention calculates the evaluation score of each pre-selected transmission network scheme through multiple adaptability indicators. It can select the pre-selected transmission network scheme with the highest evaluation score from multiple pre-selected transmission network schemes as the access transmission network scheme for the target renewable energy power station, thereby improving the accuracy of transmission network selection and thus improving the stability of the transmission system of the corresponding renewable energy power station.

[0084] In conjunction with the above embodiments, in one embodiment, the adaptability index value includes a safety adaptability index value; calculating the adaptability index value of each transmission network pre-selection scheme based on the transmission network data in each transmission network pre-selection scheme includes:

[0085] Based on the predicted load rate of each transmission line in the first AC voltage transmission line in each pre-selected transmission network scheme and the number of first AC voltage transmission lines, calculate the average predicted load rate of the first AC voltage transmission line in each pre-selected transmission network scheme.

[0086] The calculation process of the average predicted load factor of the first AC voltage transmission line in each pre-selected transmission network scheme is shown in formula (5).

[0087]

[0088] In formula (5), R j,1Let T be the average predicted load factor of the first AC voltage transmission line in the j-th pre-selected transmission network scheme. j,1 Let γ be the number of first AC voltage transmission lines in the j-th pre-selected transmission network scheme. j,1,n Let n be the predicted load factor of the nth transmission line in the first AC voltage transmission line of the j-th pre-selected transmission network scheme.

[0089] Based on the predicted load rate of each AC voltage transmission line in each pre-selected transmission network scheme and the number of second AC voltage transmission lines, calculate the average predicted load rate of the second AC voltage transmission line in each pre-selected transmission network scheme.

[0090] The calculation process of the average predicted load factor of the second AC voltage transmission line in each pre-selected transmission network scheme is shown in formula (6);

[0091]

[0092] In formula (6), R j,2 Let T be the average predicted load factor of the second AC voltage transmission line in the j-th pre-selected transmission network scheme. j,2 Let γ be the number of second AC voltage transmission lines in the j-th pre-selected transmission network scheme. j,2,n Let n be the predicted load factor of the nth transmission line in the second AC voltage transmission line of the j-th pre-selected transmission network scheme.

[0093] Based on the predicted load factor of each DC transmission line and the number of DC transmission lines in each pre-selected transmission network scheme, calculate the average predicted load factor of DC transmission lines in each pre-selected transmission network scheme.

[0094] The calculation process of the average predicted load factor of DC transmission lines in each pre-selected transmission network scheme is shown in formula (7);

[0095]

[0096] In formula (7), R j,DC Let T be the average predicted load factor of the DC transmission line in the j-th pre-selected transmission network scheme. j,DC Let γ be the number of DC transmission lines in the j-th pre-selected transmission network scheme. j,DC,n Let n be the predicted load factor of the nth DC transmission line in the j-th pre-selected transmission network scheme.

[0097] Based on the average predicted load factor of the first AC voltage transmission line, the average predicted load factor of the second AC voltage transmission line, the average predicted load factor of the DC transmission line in each pre-selected transmission network scheme, and the corresponding transmission network data for each pre-selected transmission network scheme, calculate the transmission network security adaptability index value for each pre-selected transmission network scheme.

[0098] Specifically, the calculation process of the power grid security adaptability index value of each pre-selected power grid scheme is shown in formula (8);

[0099]

[0100] In formula (8), R j,1 Let T be the average predicted load factor of the first AC voltage transmission line in the j-th pre-selected transmission network scheme. j,1 Let γ be the number of first AC voltage transmission lines in the j-th pre-selected transmission network scheme. j,1,n Let R be the predicted load factor of the nth transmission line in the first AC voltage transmission line of the j-th pre-selected transmission network scheme. j,2 Let T be the average predicted load factor of the second AC voltage transmission line in the j-th pre-selected transmission network scheme. j,2 Let γ be the number of second AC voltage transmission lines in the j-th pre-selected transmission network scheme. j, 2 ,n Let R be the predicted load factor of the nth transmission line in the second AC voltage transmission line of the j-th pre-selected transmission network scheme. j,DC Let T be the average predicted load factor of the DC transmission line in the j-th pre-selected transmission network scheme. j,DC Let γ be the number of DC transmission lines in the j-th pre-selected transmission network scheme. j,DC,n Let λ be the predicted load factor of the nth DC transmission line in the j-th pre-selected transmission network scheme. j,1 Let be the safety adaptability index value of the j-th pre-selected power transmission network scheme.

[0101] The method provided in this embodiment of the invention calculates the safety adaptability index value of each transmission network pre-selection scheme based on the average predicted load rate of the first AC voltage transmission line, the average predicted load rate of the second AC voltage transmission line, the average predicted load rate of the DC transmission line, and the corresponding transmission network data of each transmission network pre-selection scheme. By calculating the average predicted load rate of multiple types of transmission lines in each transmission network pre-selection scheme, the accuracy of the safety adaptability index value of each transmission network pre-selection scheme can be improved.

[0102] In conjunction with the above embodiments, in one embodiment, the adaptability index value includes an efficiency adaptability index value; the step of calculating the adaptability index value of each transmission network pre-selection scheme based on the transmission network data in each transmission network pre-selection scheme includes:

[0103] Obtain the predicted annual utilization duration of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line in each pre-selected transmission network scheme;

[0104] The predicted annual utilization time refers to the predicted value calculated based on the actual annual utilization time of the corresponding transmission line. The actual annual utilization time refers to the usage time of the corresponding transmission line within one year. The predicted annual utilization time can be obtained by averaging the usage time of the corresponding transmission line within a preset period. For example, if the preset period is 2019-2021, and the first transmission line in the first AC voltage transmission line has a usage time of 6000 hours in 2019, 6600 hours in 2020, and 6300 hours in 2021, then the predicted annual utilization time of the first transmission line in the first AC voltage transmission line is (6000+6600+6300) / 3 = 6300 hours.

[0105] Based on the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines in each pre-selected transmission network scheme, and the predicted annual utilization duration of each of the first AC voltage transmission lines, the second AC voltage transmission lines, and the DC transmission lines in each pre-selected transmission network scheme, the efficiency adaptability index value of each pre-selected transmission network scheme is calculated.

[0106] Specifically, the calculation formula for the efficiency adaptability index value of each pre-selected transmission network scheme is shown in Equation (9);

[0107]

[0108] In formula (9), T j,1 Let α be the number of first AC voltage transmission lines in the j-th pre-selected transmission network scheme. j,1,n Let T be the predicted annual utilization duration of the nth transmission line in the first AC voltage transmission line of the j-th pre-selected transmission network scheme. j,2 Let α be the number of second AC voltage transmission lines in the j-th pre-selected transmission network scheme. j,2,n Let T be the predicted annual utilization duration of the nth transmission line in the second AC voltage transmission line of the j-th pre-selected transmission network scheme. j,DCLet α be the number of DC transmission lines in the j-th pre-selected transmission network scheme. j,DC,n Let λ be the predicted load factor of the nth DC transmission line in the j-th pre-selected transmission network scheme. j,2 Let be the efficiency adaptability index value of the j-th pre-selected transmission network scheme.

[0109] The method provided in this invention can obtain the efficiency adaptability index value of each transmission network pre-selection scheme by using the predicted annual utilization time of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line in each pre-selection scheme of the transmission network.

[0110] In conjunction with the above embodiments, in one embodiment, the adaptability index value includes a fault adaptability index value; calculating the adaptability index value for each transmission network pre-selection scheme based on transmission network data in each transmission network pre-selection scheme includes:

[0111] The frequency of occurrence of preset faults in each pre-selected transmission network scheme is used as the first fault value of the corresponding pre-selected transmission network scheme.

[0112] Among them, the preset fault refers to the fault in the power system of the corresponding pre-selected scheme of the transmission network that does not meet the N-1 criterion. The N-1 criterion is a criterion for judging the safety of the power system. The N-1 criterion is also known as the single fault safety test rule.

[0113] The first reference value of the first AC voltage transmission line when a preset fault occurs in each pre-selected scheme of the transmission network is used as the second fault value of the corresponding preset fault. The first reference value is used to characterize the number of first AC voltage transmission lines in which the active power flow exceeds the first power limit.

[0114] Among them, active power flow refers to the active power passing through the transmission line. For example, active power flow in the first AC voltage transmission line refers to the active power passing through the first AC voltage transmission line.

[0115] The second reference value of the first AC voltage transmission line when a preset fault occurs in each pre-selected scheme of the transmission network is used as the third fault value of the corresponding preset fault. The second reference value is used to characterize the number of second AC voltage transmission lines in which the active power flow exceeds the second power limit.

[0116] The third reference value of the DC transmission line when a preset fault occurs in each of the pre-selected schemes of the transmission network is used as the fourth fault value of the corresponding preset fault. The third reference value is used to characterize the number of DC transmission lines in which the active power flow exceeds the third power limit.

[0117] Based on the first fault value, the second fault value, the third fault value, and the fourth fault value when a preset fault occurs in each pre-selected transmission network scheme, and the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines in the transmission network data of each pre-selected transmission network scheme, the fault adaptability index value of each pre-selected transmission network scheme is calculated.

[0118] Specifically, the calculation formula for the fault adaptability index value of each pre-selected scheme of the transmission network is shown in Equation (10);

[0119]

[0120] In formula (10), N fault Let T be the first fault value of the j-th pre-selected transmission network scheme. j,1 Let β be the number of first AC voltage transmission lines in the j-th pre-selected transmission network scheme. j,1,t T represents the second fault value (i.e., the first reference value of the first AC voltage transmission line) when the preset fault occurs for the tth time in the j-th pre-selected transmission network scheme. j,2 Let β be the number of second AC voltage transmission lines in the j-th pre-selected transmission network scheme. j,2,t T represents the third fault value (i.e., the second reference value of the second AC voltage transmission line) when the preset fault occurs for the tth time in the j-th pre-selected transmission network scheme. j,DC Let β be the number of DC transmission lines in the j-th pre-selected transmission network scheme. j,DC,t Let λ be the fourth fault value (i.e., the third reference value of the DC transmission line) when the preset fault occurs for the tth time in the j-th pre-selected transmission network scheme. j,3 Let be the fault adaptability index value of the j-th pre-selected transmission network scheme.

[0121] The method provided in this invention can provide more dimensions of indicators for the selection of power transmission network schemes by calculating the fault adaptability index value of each pre-selected power transmission network scheme, thereby improving the accuracy of the selection of power transmission network schemes.

[0122] In conjunction with the above embodiments, in one embodiment, the adaptability index value includes a source-load adaptability index value; calculating the adaptability index value for each transmission network pre-selection scheme based on transmission network data in each transmission network pre-selection scheme includes:

[0123] The number of non-new energy generators in each pre-selected transmission network scheme is taken as the first value of the corresponding pre-selected transmission network scheme.

[0124] Determine the second and third values ​​for each non-new energy generator in each pre-selected scheme of the transmission network. The second value is used to characterize the average power loss of the corresponding non-new energy generator during the line congestion process, and the third value is used to characterize the line congestion duration of the corresponding non-new energy generator.

[0125] Based on the first, second, and third values ​​of each pre-selected transmission network scheme, calculate the source-load adaptability index value for each pre-selected transmission network scheme.

[0126] Specifically, the calculation formula for the source-load adaptability index value of each pre-selected transmission network scheme is shown in formula (11);

[0127]

[0128] In formula (11), λ j,4 Let N be the source-load adaptability index value of the j-th pre-selected transmission network scheme. j,gene Let T be the number of non-new energy generators in the j-th pre-selected transmission network scheme. j,total P represents the total duration (total hours) of a year. j,u,loss Let T be the average annual power loss of the u-th non-new energy generator in the j-th pre-selected transmission network scheme. j,u,loss Let be the annual average line congestion duration of the u-th non-new energy generator in the j-th pre-selected transmission network scheme. The annual average line congestion duration refers to the average congestion duration caused by line congestion for the non-new energy generator each year.

[0129] The method provided in this embodiment of the invention can improve the accuracy of selecting a target transmission network scheme based on the source-load adaptability index value by increasing the calculation of the source-load adaptability index value for each pre-selected transmission network scheme.

[0130] In conjunction with the above embodiments, in one embodiment, the adaptability index value includes a renewable energy consumption adaptability index value; based on the transmission network data in each transmission network pre-selection scheme, the adaptability index value of each transmission network pre-selection scheme is calculated, including:

[0131] Determine the number of new energy power plants in each pre-selected transmission network scheme, and determine the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme;

[0132] Based on the number of new energy power plants in each pre-selected transmission network scheme, and the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme, the new energy absorption adaptability index value of each pre-selected transmission network scheme is calculated.

[0133] Specifically, the calculation formula for the new energy consumption adaptability index value of each pre-selected power transmission network scheme is shown in formula (12);

[0134]

[0135] In formula (12), λ j,5 Let N be the renewable energy absorption adaptability index value of the j-th pre-selected transmission network scheme. j,new Let P be the number of new energy power plants in the j-th pre-selected transmission network scheme. j,d Let S be the average annual power generation of the d-th renewable energy plant in the j-th pre-selected transmission network scheme. j,d Let d be the installed capacity of the d-th new energy power plant in the j-th pre-selected power transmission network scheme.

[0136] The method provided in this invention can improve the accuracy of the calculation results of the new energy absorption adaptability index value of each transmission network pre-selection scheme by calculating the installed capacity and annual average power generation of each new energy power plant in each transmission network pre-selection scheme.

[0137] In conjunction with the above embodiments, in one embodiment, the adaptability index value includes a regulating capacity adaptability index value; calculating the adaptability index value for each transmission network pre-selection scheme based on transmission network data in each transmission network pre-selection scheme includes:

[0138] From each pre-selected transmission network scheme, a predetermined number of transmission network operation scenarios are determined, and the operating time of each transmission network operation scenario is determined;

[0139] The preset quantity is an integer not less than 2.

[0140] Determine the number of adjustable power generators in each transmission network operation scenario, and determine the upper limit and lower limit of the total adjustable power of each adjustable power generator in each transmission network operation scenario;

[0141] Specifically, the formula for calculating the total adjustable power limit of each adjustable power generator in each power transmission network operation scenario is shown in formula (13);

[0142]

[0143] In formula (13), N j,m P represents the number of adjustable power generators in the m-th transmission network operation scenario within the j-th pre-selected transmission network scheme; j,m,up P represents the upper limit of the total adjustable power of the adjustable power generators in the operating scenario of the m-th transmission network in the j-th pre-selected transmission network scheme; j,m,z,upP represents the upper limit of the adjustable power of the z-th adjustable generator in the m-th transmission network operation scenario within the j-th pre-selected transmission network scheme. j,m,z Let P be the output power of the z-th adjustable power generator in the m-th transmission network operation scenario of the j-th pre-selected transmission network scheme. j,m,dw P represents the lower limit of the total adjustable power of the adjustable power generator in the operating scenario of the m-th transmission network in the j-th pre-selected transmission network scheme; j,m,z,dw This is the lower limit of the adjustable power of the z-th adjustable power generator in the m-th transmission network operation scenario of the j-th pre-selected transmission network scheme.

[0144] Based on the operating time of each transmission network operation scenario in each pre-selected transmission network scheme, the number of adjustable power generators in each transmission network operation scenario, and the upper and lower limits of the adjustable power of each adjustable power generator, the adjustment capacity adaptability index value of each pre-selected transmission network scheme is calculated.

[0145] Specifically, the formula for calculating the adjustment capacity adaptability index value of each pre-selected transmission network scheme is shown in formula (14);

[0146]

[0147] In formula (14), T j,m,reg Let T be the runtime of the m-th transmission network operation scenario in the j-th pre-selected transmission network scheme. j,m,sati For the j-th pre-selected transmission network scheme, ΔP is the value of the m-th transmission network in the operation scenario. j,m,D(t) Satisfy P j,m,dw ≤ΔP j,m,D(t) ≤P j,m,up The runtime of the condition; where ΔP j,m,D(t) This refers to the load power P in the operating scenario of the m-th transmission network in the j-th pre-selected transmission network scheme. j,m,up P represents the upper limit of the total adjustable power of the adjustable power generators in the operating scenario of the m-th transmission network in the j-th pre-selected transmission network scheme; j,m,dw Let λ be the lower limit of the total adjustable power of the adjustable power generator in the operating scenario of the m-th transmission network in the j-th pre-selected transmission network scheme. j,6 Let be the regulation capacity adaptability index value of the j-th pre-selected transmission network scheme.

[0148] The method provided in this embodiment of the invention can determine the merits of the adjustable capacity of each pre-selected transmission network scheme by calculating the adjustment capacity adaptability index value of each pre-selected transmission network scheme, thereby selecting a suitable transmission network scheme as the target transmission network scheme from multiple pre-selected transmission network schemes, thereby improving the reliability of the target transmission network scheme.

[0149] It is worth mentioning that the predicted load rate in this invention,

[0150] In one embodiment, such as Figure 3 As shown, a method for selecting a power transmission network scheme is provided, including:

[0151] 301. Determine multiple pre-selected transmission network schemes and obtain the corresponding transmission network data for each pre-selected transmission network scheme. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line and each transmission line in the DC transmission line.

[0152] 302. Based on the transmission network data in each pre-selected transmission network scheme, calculate the safety adaptability index, efficiency adaptability index, fault adaptability index, source-load adaptability index, renewable energy consumption adaptability index, and regulation capacity adaptability index for each pre-selected transmission network scheme.

[0153] 303. Calculate the evaluation score of each pre-selected transmission network scheme based on its safety adaptability index, efficiency adaptability index, fault adaptability index, source-load adaptability index, renewable energy consumption adaptability index, and regulation capacity adaptability index; and select the pre-selected transmission network scheme with the highest evaluation score as the target transmission network scheme.

[0154] The method provided in this invention calculates the evaluation score of each pre-selected transmission network scheme through multiple adaptability indicators, and can select the transmission network scheme with the highest evaluation score from multiple pre-selected transmission network schemes as the access transmission network scheme for the target renewable energy power station, thereby improving the accuracy of transmission network selection.

[0155] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0156] Based on the same inventive concept, this application also provides a transmission network scheme selection device for implementing the above-described method for selecting transmission network schemes. The solution provided by this device is similar to the implementation described in the above-described method. Therefore, the specific limitations in one or more embodiments of the transmission network scheme selection device provided below can be found in the limitations of the transmission network scheme selection method described above, and will not be repeated here.

[0157] In one embodiment, such as Figure 4 As shown, a power transmission network scheme selection device is provided, comprising: a determination module 401, a first calculation module 402, and a second calculation module 403, wherein:

[0158] The determination module 401 is used to determine multiple pre-selected transmission network schemes and obtain the corresponding transmission network data for each pre-selected transmission network scheme. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line and each transmission line in the DC transmission line.

[0159] The first calculation module 402 is used to calculate the adaptability index value of each transmission network pre-selection scheme based on the transmission network data in each transmission network pre-selection scheme;

[0160] The second calculation module 403 is used to calculate the evaluation score of each pre-selected transmission network scheme based on the adaptability index value of each pre-selected transmission network scheme; and to select the pre-selected transmission network scheme with the highest evaluation score as the target transmission network scheme.

[0161] In one embodiment, the first computing module 402 includes:

[0162] The first calculation submodule is used to calculate the average predicted load rate of the first AC voltage transmission line in each pre-selected transmission network scheme based on the predicted load rate of each transmission line in the first AC voltage transmission line in each pre-selected transmission network scheme and the number of first AC voltage transmission lines.

[0163] The second calculation submodule is used to calculate the average predicted load rate of the second AC voltage transmission line in each pre-selected transmission network scheme based on the predicted load rate of each transmission line in the first AC voltage transmission line and the number of the second AC voltage transmission lines in each pre-selected transmission network scheme.

[0164] The third calculation submodule is used to calculate the average predicted load rate of DC transmission lines in each pre-selected DC transmission scheme based on the predicted load rate of each DC transmission line and the number of DC transmission lines in each pre-selected DC transmission scheme.

[0165] The fourth calculation submodule is used to calculate the safety adaptability index value of each transmission network pre-selection scheme based on the average predicted load rate of the first AC voltage transmission line, the average predicted load rate of the second AC voltage transmission line, the average predicted load rate of the DC transmission line, and the corresponding transmission network data of each transmission network pre-selection scheme.

[0166] In one embodiment, the first computing module 402 further includes:

[0167] The acquisition submodule is used to acquire the predicted annual utilization duration of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line in each pre-selected transmission network scheme.

[0168] The fifth calculation submodule is used to calculate the efficiency adaptability index value of each transmission network pre-selection scheme based on the number of first AC voltage transmission lines, second AC voltage transmission lines and DC transmission lines in each transmission network pre-selection scheme, as well as the predicted annual utilization time of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line and each transmission line in the DC transmission line corresponding to each transmission network pre-selection scheme.

[0169] In one embodiment, the first computing module 402 further includes:

[0170] The first value-taking submodule is used to take the frequency of occurrence of preset faults in each pre-selected transmission network scheme as the first fault value of the corresponding pre-selected transmission network scheme.

[0171] The second value-taking submodule is used to take the first reference value of the first AC voltage transmission line when a preset fault occurs in each pre-selected scheme of the transmission network as the second fault value of the corresponding preset fault. The first reference value is used to characterize the number of first AC voltage transmission lines in which the active power flow exceeds the first power limit.

[0172] The third value-taking submodule is used to take the second reference value of the first AC voltage transmission line when a preset fault occurs in each transmission network pre-selection scheme as the third fault value of the corresponding preset fault. The second reference value is used to characterize the number of second AC voltage transmission lines in which the active power flow exceeds the second power limit.

[0173] The fourth value acquisition submodule is used to take the third reference value of the DC transmission line when a preset fault occurs in each pre-selected scheme of the transmission network as the fourth fault value of the corresponding preset fault. The third reference value is used to characterize the number of DC transmission lines in the DC transmission line whose active power flow exceeds the third power limit.

[0174] The sixth calculation submodule is used to calculate the fault adaptability index value of each transmission network pre-selection scheme based on the first fault value, the second fault value, the third fault value, and the fourth fault value when a preset fault occurs in each transmission network pre-selection scheme, and the transmission network data of each transmission network pre-selection scheme, including the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines.

[0175] In one embodiment, the first computing module 402 further includes:

[0176] The fifth value-taking submodule is used to take the number of non-new energy generators in each transmission network pre-selection scheme as the first value of the corresponding transmission network pre-selection scheme.

[0177] The first determination submodule is used to determine the second and third values ​​of each non-new energy generator in each pre-selected scheme of the transmission network. The second value is used to characterize the average power loss of the corresponding non-new energy generator during the line congestion process, and the third value is used to characterize the line congestion duration of the corresponding non-new energy generator.

[0178] The seventh calculation submodule is used to calculate the source-load adaptability index value of each transmission network pre-selection scheme based on the first, second, and third values ​​of each transmission network pre-selection scheme.

[0179] In one embodiment, the first computing module 402 further includes:

[0180] The second determining submodule is used to determine the number of new energy power plants in each pre-selected transmission network scheme, and to determine the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme.

[0181] The eighth calculation submodule is used to calculate the new energy consumption adaptability index value of each transmission network pre-selection scheme based on the number of new energy power plants in each transmission network pre-selection scheme, as well as the installed capacity and average annual power generation of each new energy power plant in each transmission network pre-selection scheme.

[0182] In one embodiment, the first computing module 402 further includes:

[0183] The third determining submodule is used to determine a preset number of transmission network operation scenarios from each transmission network pre-selected scheme, and to determine the running time of each transmission network operation scenario;

[0184] The fourth determination submodule is used to determine the number of adjustable power generators in each transmission network operation scenario in each transmission network pre-selection scheme, and to determine the upper limit and lower limit of the total adjustable power of each adjustable power generator in each transmission network operation scenario;

[0185] The ninth determination submodule is used to calculate the adjustment capacity adaptability index value of each transmission network pre-selection scheme based on the running time of each transmission network operation scenario in each transmission network pre-selection scheme, the number of adjustable power generators in each transmission network operation scenario, and the upper and lower limits of the adjustment power of each adjustable power generator.

[0186] The modules in the aforementioned power transmission network scheme selection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0187] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 5As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for selecting a power transmission network scheme. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0188] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0189] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0190] Multiple pre-selected transmission network schemes are determined, and the corresponding transmission network data for each pre-selected transmission network scheme is obtained. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line.

[0191] Based on the transmission network data in each pre-selected transmission network scheme, calculate the adaptability index value for each pre-selected transmission network scheme;

[0192] Based on the adaptability index value of each pre-selected transmission network scheme, the evaluation score of each pre-selected transmission network scheme is calculated; the pre-selected transmission network scheme with the highest evaluation score is selected as the target transmission network scheme.

[0193] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0194] Based on the predicted load rate of each transmission line in the first AC voltage transmission line in each pre-selected transmission network scheme and the number of first AC voltage transmission lines, calculate the average predicted load rate of the first AC voltage transmission line in each pre-selected transmission network scheme.

[0195] Based on the predicted load rate of each AC voltage transmission line in each pre-selected transmission network scheme and the number of second AC voltage transmission lines, calculate the average predicted load rate of the second AC voltage transmission line in each pre-selected transmission network scheme.

[0196] Based on the predicted load factor of each DC transmission line and the number of DC transmission lines in each pre-selected transmission network scheme, calculate the average predicted load factor of DC transmission lines in each pre-selected transmission network scheme.

[0197] Based on the average predicted load factor of the first AC voltage transmission line, the average predicted load factor of the second AC voltage transmission line, the average predicted load factor of the DC transmission line in each pre-selected transmission network scheme, and the corresponding transmission network data for each pre-selected transmission network scheme, calculate the safety adaptability index value for each pre-selected transmission network scheme.

[0198] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0199] Obtain the predicted annual utilization duration of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line in each pre-selected transmission network scheme;

[0200] Based on the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines in each pre-selected transmission network scheme, and the predicted annual utilization duration of each transmission line in the first AC voltage transmission line, the second AC voltage transmission line, and the DC transmission line in each pre-selected transmission network scheme, calculate the efficiency adaptability index value of each pre-selected transmission network scheme.

[0201] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0202] The frequency of occurrence of preset faults in each pre-selected transmission network scheme is used as the first fault value of the corresponding pre-selected transmission network scheme.

[0203] The first reference value of the first AC voltage transmission line when a preset fault occurs in each of the pre-selected schemes of the transmission network is used as the second fault value of the corresponding preset fault. The first reference value is used to characterize the number of first AC voltage transmission lines in which the active power flow exceeds the first power limit.

[0204] The second reference value of the first AC voltage transmission line when a preset fault occurs in each of the pre-selected schemes of the transmission network is used as the third fault value of the corresponding preset fault. The second reference value is used to characterize the number of second AC voltage transmission lines in which the active power flow exceeds the second power limit.

[0205] The third reference value of the DC transmission line when a preset fault occurs in each of the pre-selected schemes of the transmission network is used as the fourth fault value of the corresponding preset fault. The third reference value is used to characterize the number of DC transmission lines in which the active power flow exceeds the third power limit.

[0206] Based on the first fault value, the second fault value, the third fault value, and the fourth fault value when a preset fault occurs in each pre-selected transmission network scheme, and the transmission network data of each pre-selected transmission network scheme including the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, calculate the fault adaptability index value of each pre-selected transmission network scheme.

[0207] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0208] The number of non-new energy generators in each pre-selected transmission network scheme is taken as the first value of the corresponding pre-selected transmission network scheme.

[0209] Determine the second and third values ​​for each non-new energy generator in each pre-selected scheme of the transmission network. The second value is used to characterize the average power loss of the corresponding non-new energy generator during the line congestion process, and the third value is used to characterize the line congestion duration of the corresponding non-new energy generator.

[0210] Based on the first, second, and third values ​​of each pre-selected transmission network scheme, calculate the source-load adaptability index value for each pre-selected transmission network scheme.

[0211] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0212] Determine the number of new energy power plants in each pre-selected transmission network scheme, and determine the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme;

[0213] Based on the number of new energy power plants in each pre-selected transmission network scheme, and the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme, the new energy absorption adaptability index value of each pre-selected transmission network scheme is calculated.

[0214] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0215] From each pre-selected transmission network scheme, a predetermined number of transmission network operation scenarios are determined, and the operating time of each transmission network operation scenario is determined;

[0216] Determine the number of adjustable power generators in each transmission network operation scenario within each pre-selected transmission network scheme, and determine the upper limit and lower limit of the total adjustable power of each adjustable power generator in each transmission network operation scenario;

[0217] Based on the operating time of each transmission network operation scenario in each pre-selected transmission network scheme, the number of adjustable power generators in each transmission network operation scenario, and the upper and lower limits of the adjustable power of each adjustable power generator, the adjustment capacity adaptability index value of each pre-selected transmission network scheme is calculated.

[0218] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0219] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0220] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data shall comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0221] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0222] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0223] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for selecting a power transmission network scheme, characterized in that, The method includes: Multiple pre-selected transmission network schemes are determined, and the corresponding transmission network data for each pre-selected transmission network scheme is obtained. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines, as well as the predicted load rate of each of the first AC voltage transmission lines, each of the second AC voltage transmission lines, and each of the DC transmission lines. Based on the transmission network data in each pre-selected transmission network scheme, the adaptability index value of each pre-selected transmission network scheme is calculated; the adaptability index value includes source-load adaptability index value, safety adaptability index value, efficiency adaptability index value, fault adaptability index value, renewable energy consumption adaptability index value, and regulation capacity adaptability index value. Based on the adaptability index value of each pre-selected transmission network scheme, calculate the evaluation score of each pre-selected transmission network scheme; and select the pre-selected transmission network scheme with the highest evaluation score as the target transmission network scheme. The calculation of the source-load adaptability index value, specifically the step of calculating the adaptability index value of each transmission network pre-selection scheme based on transmission network data in each pre-selection scheme, includes: taking the number of non-new energy generators in each pre-selection scheme as the first value of the corresponding transmission network pre-selection scheme; determining the second and third values ​​of each non-new energy generator in each pre-selection scheme, where the second value characterizes the average power loss of the corresponding non-new energy generator during line congestion, and the third value characterizes the line congestion duration of the corresponding non-new energy generator; and calculating the source-load adaptability index value of each pre-selection scheme based on the first, second, and third values ​​of each pre-selection scheme. The calculation of the evaluation score for each pre-selected transmission network scheme includes: calculating the weight of each adaptability index based on the value of each adaptability index for each pre-selected transmission network scheme; calculating the positive reference distance and negative reference distance for each pre-selected transmission network scheme based on the weight of each adaptability index and the value of each adaptability index for each pre-selected transmission network scheme; and calculating the evaluation score for each pre-selected transmission network scheme based on the positive reference distance and negative reference distance for each pre-selected transmission network scheme.

2. The method according to claim 1, characterized in that, The adaptability index value includes a safety adaptability index value; the calculation of the adaptability index value for each transmission network pre-selection scheme based on the transmission network data in each transmission network pre-selection scheme includes: Based on the predicted load rate of each transmission line in the first AC voltage transmission line in each pre-selected transmission network scheme and the number of the first AC voltage transmission lines, calculate the average predicted load rate of the first AC voltage transmission line in each pre-selected transmission network scheme. Based on the predicted load rate of each transmission line in the second AC voltage transmission line in each pre-selected transmission network scheme and the number of the second AC voltage transmission lines, calculate the average predicted load rate of the second AC voltage transmission line in each pre-selected transmission network scheme. Based on the predicted load rate of each DC transmission line in each pre-selected transmission network scheme and the number of DC transmission lines, calculate the average predicted load rate of the DC transmission lines in each pre-selected transmission network scheme. Based on the average predicted load rate of the first AC voltage transmission line, the average predicted load rate of the second AC voltage transmission line, the average predicted load rate of the DC transmission line in each pre-selected transmission network scheme, and the corresponding transmission network data for each pre-selected transmission network scheme, calculate the safety adaptability index value for each pre-selected transmission network scheme.

3. The method according to claim 2, characterized in that, The adaptability index values ​​include efficiency adaptability index values; The step of calculating the adaptability index value of each pre-selected transmission network scheme based on the transmission network data in each pre-selected scheme includes: Obtain the predicted annual utilization duration of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line, and each transmission line in the DC transmission line in each pre-selected transmission network scheme; Based on the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines in each pre-selected transmission network scheme, and the predicted annual utilization duration of each of the first AC voltage transmission lines, the second AC voltage transmission lines, and the DC transmission lines in each pre-selected transmission network scheme, the efficiency adaptability index value of each pre-selected transmission network scheme is calculated.

4. The method according to claim 2, characterized in that, The adaptability index value includes a fault adaptability index value; the step of calculating the adaptability index value of each transmission network pre-selection scheme based on the transmission network data in each transmission network pre-selection scheme includes: The frequency of occurrence of preset faults in each pre-selected transmission network scheme is used as the first fault value of the corresponding pre-selected transmission network scheme. The first reference value of the first AC voltage transmission line when a preset fault occurs in each pre-selected scheme of the transmission network is used as the second fault value of the corresponding preset fault. The first reference value is used to characterize the number of first AC voltage transmission lines in which the active power flow exceeds the first power limit. The second reference value of the first AC voltage transmission line when a preset fault occurs in each pre-selected scheme of the transmission network is used as the third fault value of the corresponding preset fault. The second reference value is used to characterize the number of second AC voltage transmission lines in which the active power flow exceeds the second power limit. The third reference value of the DC transmission line when a preset fault occurs in each of the pre-selected schemes of the transmission network is used as the fourth fault value of the corresponding preset fault. The third reference value is used to characterize the number of DC transmission lines in which the active power flow exceeds the third power limit. Based on the first fault value, the second fault value, the third fault value, and the fourth fault value when a preset fault occurs in each transmission network pre-selection scheme, and the number of first AC voltage transmission lines, second AC voltage transmission lines, and DC transmission lines in the transmission network data of each transmission network pre-selection scheme, the fault adaptability index value of each transmission network pre-selection scheme is calculated.

5. The method according to claim 1, characterized in that, The adaptability index values ​​include the adaptability index values ​​for renewable energy consumption; the calculation of the adaptability index values ​​for each pre-selected transmission network scheme based on the transmission network data in each pre-selected scheme includes: Determine the number of new energy power plants in each pre-selected transmission network scheme, and determine the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme; Based on the number of new energy power plants in each pre-selected transmission network scheme, and the installed capacity and average annual power generation of each new energy power plant in each pre-selected transmission network scheme, the new energy absorption adaptability index value of each pre-selected transmission network scheme is calculated.

6. The method according to claim 1, characterized in that, The adaptive index values ​​include the adjustment capacity adaptive index values; The step of calculating the adaptability index value of each pre-selected transmission network scheme based on the transmission network data in each pre-selected scheme includes: From each pre-selected transmission network scheme, a predetermined number of transmission network operation scenarios are determined, and the operating time of each transmission network operation scenario is determined; Determine the number of adjustable power generators in each transmission network operation scenario within each pre-selected transmission network scheme, and determine the upper limit and lower limit of the total adjustable power of each adjustable power generator in each transmission network operation scenario; Based on the operating time of each transmission network operation scenario in each pre-selected transmission network scheme, the number of adjustable power generators in each transmission network operation scenario, and the upper and lower limits of the adjustable power of each adjustable power generator, the adjustment capacity adaptability index value of each pre-selected transmission network scheme is calculated.

7. The method according to claim 1, characterized in that, The evaluation score is equal to the negative reference distance divided by the sum of the positive reference distance and the negative reference distance.

8. A power transmission network scheme selection device, characterized in that, The device includes: The determination module is used to determine multiple pre-selected transmission network schemes and obtain the corresponding transmission network data for each pre-selected transmission network scheme. The transmission network data includes the number of first AC voltage transmission lines, second AC voltage transmission lines and DC transmission lines, as well as the predicted load rate of each transmission line in the first AC voltage transmission line, each transmission line in the second AC voltage transmission line and each transmission line in the DC transmission line. The first calculation module is used to calculate the adaptability index value of each transmission network pre-selection scheme based on the transmission network data in each transmission network pre-selection scheme; wherein, the adaptability index value includes source-load adaptability index value, safety adaptability index value, efficiency adaptability index value, fault adaptability index value, new energy consumption adaptability index value, and regulation capacity adaptability index value. The second calculation module is used to calculate the evaluation score of each pre-selected transmission network scheme based on the adaptability index value of each scheme; and to select the pre-selected transmission network scheme with the highest evaluation score as the target transmission network scheme. The calculation of the source-load adaptability index value includes a fifth value-taking submodule, which takes the number of non-new energy generators in each transmission network pre-selection scheme as the first value of the corresponding transmission network pre-selection scheme. The first determination submodule is used to determine the second and third values ​​of each non-new energy generator in each pre-selected scheme of the transmission network. The second value is used to characterize the average power loss of the corresponding non-new energy generator during the line congestion process, and the third value is used to characterize the line congestion duration of the corresponding non-new energy generator. The seventh calculation submodule is used to calculate the source-load adaptability index value of each transmission network pre-selection scheme based on the first, second, and third values ​​of each transmission network pre-selection scheme. The second calculation module is also used to calculate the weight of each adaptability index based on the value of each adaptability index of each transmission network pre-selection scheme; calculate the positive reference distance and negative reference distance of each transmission network pre-selection scheme based on the weight of each adaptability index and the value of each adaptability index of each transmission network pre-selection scheme; and calculate the evaluation score of each transmission network pre-selection scheme based on the positive reference distance and negative reference distance of each transmission network pre-selection scheme.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

11. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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