A method and system for regulating the section limit of a long-distance power transmission channel based on operating mode adjustment

Abstract

The application discloses a kind of long-distance power transmission passage section limit adjustment method and system based on operation mode adjustment, through the given power grid operation data, the historical data of each section of power grid and section limit, power transmission passage obstruction quantity, through obstruction quantity analysis, light and heavy load analysis, give the auxiliary decision suggestion of key section, through analysis and calculation, give the key section limit adjustment method under typical operation mode, reach the purpose of promoting section limit, releasing power transmission passage transmission capacity.

Description

Technical Field

[0001] This invention relates to a power grid dispatching method, and more particularly to a method and system for adjusting the quota of long-distance transmission channels based on operation mode adjustment. Background Technology

[0002] In new power systems, grid transmission capacity, like power balancing capacity, is one of the key factors restricting the absorption of new energy. With the continuous increase in the scale of new energy integration and the continuous construction and operation of ultra-high-voltage AC / DC transmission channels, the operating characteristics of long-distance transmission channels are becoming increasingly complex. New energy power generation, influenced by natural factors, exhibits volatility, low controllability, and incomplete predictability, bringing significant uncertainties to large-scale long-distance new energy transmission. Traditional transmission channel and section constraint analysis is based on reasonable boundary conditions such as power generation output, load demand, and operation and maintenance arrangements. The uncertainty of new energy power generation makes determining these boundary conditions extremely difficult, lacking sufficient theoretical and methodological support. Transmission channels face uncertainties such as combinatorial explosion, complex factors restricting new energy transmission, and cascading... The difficulties in spatiotemporal coordination of cascaded transmission channels necessitate research into typical operating modes and cross-sectional obstruction factors of these channels, and the provision of corresponding cross-sectional limit strategies for different typical operating modes. On the other hand, the operating limits of important transmission sections under typical traditional power grid modes are conservative, failing to adaptively provide real-time stable transmission limits by tracking changes in power grid operating modes. They also lack the ability to track and monitor the stable transmission limits of renewable energy transmission sections. Model-driven calculation of transmission limit of transmission sections and corresponding regulation and optimization decision-making technologies face challenges such as a significant increase in the power grid dimension, poor real-time stability verification, and high requirements for the robustness of optimization models. Summary of the Invention

[0003] Purpose of the invention: To address the above problems, this invention proposes a method and system for adjusting the cross-sectional limit of long-distance power transmission channels based on operational mode adjustment. This method can adaptively provide real-time stable transmission limits by tracking changes in the power grid's operational mode, thereby increasing the cross-sectional limit and releasing the transmission capacity of the power transmission channel.

[0004] Technical Solution: The technical solution adopted in this invention is a method for adjusting the cross-sectional limits of long-distance power transmission channels based on operational mode adjustments, comprising the following steps:

[0005] (1) Collect operational data of long-distance power transmission channel sections, the basic data of which vary with different operating modes;

[0006] (2) The average real-time power of the cross section is calculated based on the operating data;

[0007] (3) Calculate the maximum adjustable limit of the cross-section based on the operating data and the average real-time power of the cross-section;

[0008] (4) Calculate the adjusted section load rate based on the operating data and the maximum adjustable limit of the section; wherein the adjusted section load rate is the ratio between the real-time maximum active power of the section and the section limit; the real-time maximum active power of the section is calculated by adding the real-time active power of the transmission of the section to the maximum adjustable limit of the section.

[0009] (5) If the adjusted cross-sectional load factor H′ i The value of the heavy load rate index H is lower than or equal to the value of the heavy load rate index. i The adjustable range is set to the maximum adjustable value of the cross-sectional limit obtained in step (3); if the adjusted cross-sectional load rate H′ i Higher than the heavy load rate index value H i Then, the maximum adjustable cross-sectional limit is recalculated, and the formula is: Vmax i =H i ·L i -P i In the formula, Vmax i H is the maximum adjustable limit for cross-sections. i L represents the heavy load rate index data value. i For the cross-sectional limit of long-distance power transmission channels, P i This represents the real-time active power of a long-distance power transmission channel section.

[0010] The operational data includes: section limit data of long-distance power transmission channels, real-time active power data of long-distance power transmission channels, historical active power of long-distance power transmission channels, maximum limit data of sections, and heavy load rate index data of long-distance power transmission channels.

[0011] The calculation of the cross-sectional average real-time power based on the operating data includes: calculating the average value of the historical active power within the operating time T range based on the historical active power of the long-distance transmission channel cross-section, and obtaining the cross-sectional average real-time power.

[0012] The step of calculating the adjusted section overload rate based on the operating data and the maximum adjustable section limit includes: calculating the maximum adjustable section limit based on the operating data and the average real-time power of the section includes: subtracting the average real-time power of the section from the maximum adjustable section limit to obtain the maximum adjustable section limit.

[0013] The adjusted section load rate is calculated based on the operating data and the maximum adjustable section limit. This includes: calculating the adjusted section load rate based on the real-time active power data of the long-distance transmission channel section, the maximum adjustable section limit, and the section limit data of the long-distance transmission channel section.

[0014] If the maximum adjustable cross-sectional limit calculated in step (5) has no positive solution, then it is determined that the line is already overloaded.

[0015] This invention proposes a long-distance transmission channel section limit adjustment system based on operation mode adjustment, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the long-distance transmission channel section limit adjustment method based on operation mode adjustment.

[0016] This invention proposes a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the aforementioned method for adjusting the cross-sectional limits of long-distance power transmission channels based on operating mode adjustment.

[0017] This invention proposes a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the method for adjusting the cross-sectional limits of long-distance power transmission channels based on operating mode adjustment.

[0018] This invention proposes a computer program product, including a computer program and / or instructions, which, when executed by a processor, implement the aforementioned method for adjusting the cross-sectional limits of long-distance power transmission channels based on operating mode adjustment.

[0019] Beneficial Effects: Compared with existing technologies, this invention has the following advantages: Relieving the conservatism in setting operational limits for critical transmission sections under typical grid conditions for long-distance transmission channels, this invention calculates the limit adjustment values ​​for long-distance transmission channel sections based on relevant operational data. It can adaptively provide real-time stable transmission limits by tracking changes in grid operation modes, thereby improving the ability to track and monitor the stable transmission limits of renewable energy transmission sections. This invention solves the problems encountered in long-distance transmission control, such as a significant increase in grid dimensions, poor real-time stability verification, and high requirements for algorithm robustness in optimization models. Attached Figure Description

[0020] Figure 1 This invention relates to a method for adjusting the cross-sectional limits of long-distance power transmission channels based on operational mode adjustments.

[0021] Figure 2 This is a schematic diagram of the power transmission channel and cross-sectional structure in Embodiment 1;

[0022] Figure 3 This is the auxiliary decision-making interface diagram in the auxiliary software for power transmission channel obstruction analysis and refined graded adjustment. Detailed Implementation

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] The flowchart of the long-distance power transmission channel section limit adjustment method based on operation mode adjustment described in this invention is as follows: Figure 1 As shown. This method is used for cross-sectional limit adjustment of long-distance power transmission channels. A schematic diagram of the power transmission channel and its cross-sectional structure is shown below. Figure 2 As shown: Figure 2 The main line (blue) in the diagram represents the transmission channel, the blue dots in the middle represent transmission sections, and the orange dots indicate other lines or small substations connecting or transmitting between transmission sections. This method uses grid operation data, historical data for each grid section, and section limits, along with resistance analysis and light / heavy load analysis, to provide auxiliary decision-making suggestions for key sections. The safe range for section limits is the difference between the section limit for long-distance transmission sections and the maximum section limit given by the power dispatching department. Specifically, it includes the following steps:

[0026] (1) Collect operational data of long-distance transmission channel sections. The basic data varies with different operating modes. The operational data includes: the section limit dataset of long-distance transmission channel sections, the real-time active power dataset of long-distance transmission channel sections, the historical active power of long-distance transmission channel sections, the maximum limit dataset of sections, and the heavy load rate index data of long-distance transmission channel sections provided by the power dispatching department.

[0027] The overload rate is the ratio of average active power to the maximum transmission power of a transmission channel. If the overload rate is not exceeded, the transmission is not considered overloaded. Because the overload rate may be defined as multiple different values ​​in different transmission sections depending on the specific circumstances such as geographical location and wiring, such as 80%, 85%, and 90%, exceeding this value is defined as overloaded.

[0028] like Figure 2 As shown, the power transmission channel S consists of transmission sections S1, S2, S3, ..., S n Composition. Data set of cross-sectional quotas for long-distance power transmission channels, L1, L2, ..., L n The maximum cross-sectional limits for each section of transmission channel S are Pmax1, Pmax2, Pmax3, ..., Pmax, respectively. n The operating time is T, and the real-time active power of each section of the transmission channel S is P1, P2, P3, ..., P... n .

[0029] (2) Calculate the average real-time power of the section by using the historical active power of the long-distance transmission channel section over the operating time T. Generally, the operating time range T uses one month's data as a reference. Depending on the season and location, data from a three-month operating period may also be used, but generally not exceeding three months. The operating time range T can be adjusted as needed.

[0030] The average real-time power of each transmission section S during its operating time is calculated by using the real-time active power of each section. This yields the average real-time power P1', P2', P3', ..., P of each section. n '.

[0031] (3) Calculate the maximum adjustable limit of the cross section based on the maximum limit dataset and the average real-time power of the cross section.

[0032] The maximum value of the cross-sectional limit Pmax i Subtract the cross-sectional average real-time power P i ', thus obtaining the maximum adjustable cross-sectional limit Vmax i .

[0033] (4) Calculate the adjusted section load factor based on the real-time active power data set of the long-distance transmission channel section, the maximum adjustable limit of the section, and the section limit data set of the long-distance transmission channel section. The adjusted section load factor is the ratio between the maximum real-time active power of the section and the section limit. The maximum real-time active power of the section is calculated by adding the maximum adjustable limit of the section to the real-time active power of the transmission channel.

[0034]

[0035] The adjusted cross-sectional load rates were calculated to be H1, H2, H3, ... H. n .

[0036] (5) If the adjusted cross-sectional load factor H′ i The data value H is lower than the heavy load rate index. i The adjustable range can then be set to the cross-sectional load factor H′. i The corresponding adjustable range, i.e., the maximum adjustable value Vmax of the cross-sectional limit obtained in step (3). i If the adjusted cross-sectional load factor H′ i Higher than the heavy load rate index value H i Then the maximum adjustable cross-sectional limit, Vmax, will be recalculated. i =H i ·L i -P iThe load factor is calculated based on the adjustment range of subsequent sections in the transmission channel. The adjustable range of active power for subsequent sections after adjustment is the maximum value that each subsequent section maintains below its maximum limit after adding the adjustable range to the actual power.

[0037] (6) The adjustment range obtained for each section after adjustment is 0 to Vmax. i If the cross-sectional limit adjustment value given by this method has no positive solution, then this method has no solution. This situation indicates that the calculated average real-time power is under heavy load, and no strategy can be given in this case.

[0038] Example 2

[0039] The present invention discloses a long-distance transmission channel section limit adjustment system based on operation mode adjustment, which provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the aforementioned method for adjusting the long-distance transmission channel section limit based on operation mode adjustment. This system is a submodule of a transmission channel obstruction analysis and refined tiered adjustment auxiliary software, used for auxiliary decision-making in long-distance transmission channel section limit adjustment. The software is deployed in various dispatch control centers as a web service; dispatchers can access it by clicking without performing actual distribution or control operations. The auxiliary decision-making interface of the transmission channel obstruction analysis and refined tiered adjustment auxiliary software is shown in the figure below. Figure 3 As shown, the final output cross-sectional limit adjustment value is the adjustment value for the cross-section that needs to be adjusted, and it is displayed in the software's auxiliary decision-making module. For example, the page displays: "Limit after adjustment for 'XX cross-section': 5150".

[0040] Example 3

[0041] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described method for adjusting the cross-sectional limits of long-distance power transmission channels based on operating mode adjustment.

[0042] Example 4

[0043] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above-described method for adjusting the cross-sectional limits of long-distance power transmission channels based on operating mode adjustment.

[0044] Example 5

[0045] In one embodiment, a computer program product is provided, including a computer program / instructions that, when executed by a processor, implement the aforementioned method for adjusting the cross-sectional limits of long-distance power transmission channels based on operating mode adjustment.

[0046] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0047] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0048] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0049] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

Claims

1. A method for adjusting the cross-sectional limits of long-distance power transmission channels based on operational mode adjustment, characterized in that, Includes the following steps: (1) Collect operational data of the cross-section of long-distance power transmission channels, wherein the operational data varies with different operating modes; (2) Calculate the average real-time power of the cross section based on the operating data; (3) Calculate the maximum adjustable limit of the cross-section based on the operating data and the average real-time power of the cross-section; (4) Calculate the adjusted section load rate based on the operating data and the maximum adjustable limit of the section; wherein the adjusted section load rate is the ratio between the real-time maximum active power of the section and the section limit; the real-time maximum active power of the section is calculated by adding the real-time active power of the transmission of the section to the maximum adjustable limit of the section. (5) If the adjusted section load factor The value of the heavy load rate index H is lower than or equal to the value of the heavy load rate index. i Then the adjustable range is set to the maximum adjustable cross-sectional limit obtained in step (3); If the adjusted cross-sectional load rate Higher than the heavy load rate index value H i Then, the maximum adjustable cross-sectional limit is recalculated, and the formula is: Vmax i =H i ·L i -P i In the formula, Vmax i H is the maximum adjustable limit for cross-sections. i L represents the heavy load rate index data value. i For the cross-sectional limit of long-distance power transmission channels, P i This represents the real-time active power of a long-distance power transmission channel section.

2. The method for adjusting the cross-sectional limit of long-distance power transmission channels based on operating mode adjustment according to claim 1, characterized in that, The operational data includes: section limit data of long-distance power transmission channels, real-time active power data of long-distance power transmission channels, historical active power of long-distance power transmission channels, maximum limit data of sections, and heavy load rate index data of long-distance power transmission channels.

3. The method for adjusting the cross-sectional limit of long-distance power transmission channels based on operation mode adjustment according to claim 2, characterized in that: The calculation of the cross-sectional average real-time power based on the operating data includes: calculating the average value of the historical active power within the operating time T range based on the historical active power of the long-distance transmission channel cross-section, and obtaining the cross-sectional average real-time power.

4. The method for adjusting the cross-sectional limit of long-distance power transmission channels based on operation mode adjustment according to claim 1, characterized in that: The step of calculating the adjusted section overload rate based on the operating data and the maximum adjustable section limit includes: calculating the maximum adjustable section limit based on the operating data and the average real-time power of the section includes: subtracting the average real-time power of the section from the maximum adjustable section limit to obtain the maximum adjustable section limit.

5. The method for adjusting the cross-sectional limit of long-distance power transmission channels based on operating mode adjustment according to claim 1, characterized in that: The adjusted section load rate is calculated based on the operating data and the maximum adjustable section limit. This includes: calculating the adjusted section load rate based on the real-time active power data of the long-distance transmission channel section, the maximum adjustable section limit, and the section limit data of the long-distance transmission channel section.

6. The method for adjusting the cross-sectional limit of long-distance power transmission channels based on operation mode adjustment according to claim 1, characterized in that: If the maximum adjustable cross-sectional limit calculated in step (5) has no positive solution, then it is determined that the line is already overloaded.

7. A long-distance transmission channel section limit adjustment system based on operation mode adjustment, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method for adjusting the cross-sectional limit of long-distance power transmission channels based on the operation mode adjustment as described in any one of claims 1 to 6.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method for adjusting the cross-sectional limit of long-distance power transmission channels based on the operation mode adjustment as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for adjusting the cross-sectional limit of long-distance power transmission channels based on the operation mode adjustment as described in any one of claims 1 to 6.

10. A computer program product comprising a computer program and / or instructions, characterized in that, When the computer program and / or instructions are executed by the processor, they implement the method for adjusting the cross-sectional limits of long-distance power transmission channels based on operating mode adjustment as described in any one of claims 1 to 6.

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