Local power grid active power coordination control method, system and device considering source-load-storage dynamic characteristic difference and medium

Abstract

The invention discloses a local power grid active power coordination control method, system and device considering source-load-storage dynamic characteristic difference and a medium, and belongs to the technical field of power coordination control of a power system. The method comprises the following steps: acquiring original power data of a local power grid, wherein the original power data comprises real-time power, an adjustable upper limit and an adjustable lower limit of each substation, real-time power of a grid-connected point and target power of the grid-connected point; calculating the distribution priority of each substation according to a pre-acquired dynamic characteristic parameter; calculating a total active power target value according to the real-time power of each substation, the real-time power of the grid-connected point and the target power of the grid-connected point; according to the adjustable lower limit and the total active power target value of each substation, calculating global power needing to be adjusted; calculating a target power reference value at the current moment based on a pre-acquired target power reference value; and calculating a power target value of each substation according to the distribution priority based on the global power needing to be adjusted and the target power reference value. The new energy power generation capacity can be fully utilized, and the energy utilization efficiency is improved.

Description

A method, system, device, and medium for coordinated active power control of a local power grid considering the differences in dynamic characteristics of power source, load, and storage. Technical Field

[0001] This invention belongs to the field of power system power coordination control technology, specifically relating to a local power grid active power coordination control method, system, device and medium that considers the differences in dynamic characteristics of source, load and storage. Background Technology

[0002] With the transformation of my country's energy structure and the introduction of the "dual-carbon" strategic goal, the large-scale integration of new energy sources and new loads has presented new challenges and requirements to the traditional power system. The traditional power system is no longer able to effectively cope with the large-scale integration of distributed energy resources and the resulting volatility and intermittency issues. Integrated generation, grid, load, and storage, as an operating mode that can maximize the utilization of new energy sources, reduce grid operation risks, and improve energy efficiency, has become an important measure for building a new power system. In recent years, the market size of integrated generation, grid, load, and storage in my country has continued to expand, becoming an important force driving energy transformation and sustainable development.

[0003] Currently, the coordinated control of power generation, load, and storage is often independent of each other, lacking effective unified scheduling and control methods. As a result, the power generation capacity of new energy sources often cannot be fully utilized, which not only wastes resources but also affects the further development of renewable energy. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method, system, device and medium for coordinated control of active power in a local power grid that considers the differences in dynamic characteristics of source, load and storage, so as to make full use of the power generation capacity of new energy sources and improve energy utilization efficiency.

[0005] This invention provides the following technical solution:

[0006] Firstly, a method for coordinated active power control of a local power grid that considers the differences in dynamic characteristics of source, load and storage is provided, including: acquiring the original power data of the local power grid, including the real-time power, adjustable upper limit, adjustable lower limit of each substation, as well as the real-time power and target power of the grid connection point;

[0007] Based on the pre-acquired dynamic characteristic parameters, calculate the allocation priority of each substation;

[0008] The total active power target value is calculated based on the real-time power of each substation, the real-time power of the grid connection point, and the target power of the grid connection point.

[0009] Calculate the global power adjustment requirement based on the adjustable lower limit of each substation and the total active power target value;

[0010] Calculate the target power reference value at the current moment based on the pre-acquired target power reference value;

[0011] Based on the global required power and target power reference values, the power target value of each substation is calculated according to the allocation priority.

[0012] As an optional technical solution of the present invention, the step of calculating the allocation priority of each substation based on the pre-acquired dynamic characteristic parameters includes:

[0013] The dynamic characteristic parameters include the response speed and adjustable power range of each substation;

[0014] Based on the pre-set weight parameters, the priority score of each sub-site is calculated and expressed as follows:

[0015] ;

[0016] in, This represents the priority score of the i-th substation. This represents the response speed of the i-th substation. This represents the adjustable power range of the i-th substation. Indicates the response speed weight. Indicates the weight of the adjustable power range. ;

[0017] The substations are sorted from highest to lowest priority score to generate allocation priorities.

[0018] As an optional technical solution of the present invention, the step of calculating the total active power target value based on the real-time power of each substation, the real-time power of the grid connection point, and the target power of the grid connection point includes:

[0019] The total active power target value is calculated and expressed as follows:

[0020] ;

[0021] in, express The target value of total active power at any given time. This represents the real-time power of the i-th substation, and N represents the number of substations. express Target power at the grid connection point at any given time. This indicates the real-time power at the grid connection point.

[0022] As an optional technical solution of the present invention, the step of calculating the global power adjustment requirement based on the adjustable lower limit of each substation and the total active power target value includes:

[0023] The global power demand is calculated and expressed as follows:

[0024] ;

[0025] in, express The global power requirement at any given time. express The target value of total active power at any given time. This represents the adjustable lower limit of the i-th substation.

[0026] As an optional technical solution of the present invention, the step of calculating the target power reference value at the current moment based on the pre-acquired target power reference value includes:

[0027] The hour is divided into several sampling points according to a set time interval. Each sampling point corresponds to a target power reference value. The target power reference values ​​of adjacent sampling points before and after the current time are confirmed.

[0028] The target power reference value at the current moment is calculated using interpolation and expressed as follows:

[0029] ;

[0030] in, This represents the target power reference value of the i-th substation at the current time. This represents the target power reference value of the sampling point preceding the i-th substation. This represents the target power reference value of the sampling point after the i-th substation, and T represents the current time. This indicates the time of the next sampling point after the current time. It indicates the time of the previous sampling point.

[0031] As an optional technical solution of the present invention, the step of calculating the power target value of each substation according to the allocation priority based on the global demand power and the target power reference value includes:

[0032] The substations are sorted according to the allocation priority, and the adjustable lower limit of each substation is used as the initial power target value of each substation.

[0033] When the type of the substation is wind power, photovoltaic, or energy storage, the substation is marked as having a target power reference value; otherwise, the substation is marked as not having a target power reference value.

[0034] When the substation has a target power reference value, the difference between the target power reference value and the initial power target value of the substation is calculated to obtain the first maximum adjustable power of the substation.

[0035] When the substation has no target power reference value, the difference between the adjustable upper limit of the substation and the initial power target value is used to obtain the first maximum adjustable power of the substation.

[0036] The smaller value between the global required power and the first maximum adjustable power is taken as the first actual allocated power of the substation. The global required power and the power target value of the substation are updated for the first time using the first actual allocated power, as expressed as:

[0037] ;

[0038] in, This represents the first actual allocated power of the i-th substation. This represents the first maximum adjustable power of the i-th substation. This represents the initial power target value for the i-th substation. express The global power requirement at any given time. This represents the power target value updated for the first time by the i-th substation. express The first update of the global power demand at any given moment;

[0039] Remark all substations with no target power reference values, and subtract the adjustable upper limit of the substation from the first updated power target value to obtain the second maximum adjustable power of the substation;

[0040] The smaller of the first updated global required power and the second maximum adjustable power is taken as the second actual allocated power of the substation. The global required power and the substation's power target value are then updated for the second time using the second actual allocated power, as follows:

[0041] ;

[0042] in, This represents the second actual allocated power of the i-th substation. This represents the second maximum adjustable power of the i-th substation. This represents the power target value updated for the second time at the i-th substation. express The global power demand is updated for the second time at this moment;

[0043] The power target value updated in the second update will be used as the final power target value.

[0044] Secondly, a local power grid active power coordination control system considering the differences in dynamic characteristics of source, load and storage is provided, including: a data acquisition module, used to acquire the raw power data of the local power grid, including the real-time power, adjustable upper limit, adjustable lower limit of each substation, as well as the real-time power and target power of the grid connection point;

[0045] The priority configuration module is used to calculate the allocation priority of each substation based on the pre-acquired dynamic characteristic parameters;

[0046] The first target value calculation module is used to calculate the total active power target value based on the real-time power of each substation, the real-time power of the grid connection point, and the target power of the grid connection point.

[0047] The global adjustable power calculation module is used to calculate the global adjustable power based on the adjustable lower limit of each substation and the total active power target value.

[0048] The reference value calculation module is used to calculate the target power reference value at the current moment based on the pre-acquired target power reference value;

[0049] The second target value calculation module is used to calculate the power target value of each substation according to the allocation priority based on the global required power and the target power reference value.

[0050] Thirdly, a local power grid active power coordination control device considering the differences in dynamic characteristics of source, load, and storage is provided, comprising a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of the method described in the first aspect.

[0051] Fourthly, a computer-readable storage medium is provided having a computer program stored thereon, characterized in that the program, when executed by a processor, implements the steps of the method described in the first aspect.

[0052] Compared with the prior art, the beneficial effects of the present invention are:

[0053] This invention provides a local power grid active power coordination control method that considers the differences in dynamic characteristics between power sources, loads, and storage. By tracking the power changes at the grid connection point, the total active power target value is calculated in real time. Combined with the target power reference value, the substation power target value is adjusted according to the allocation priority order to fully utilize the power generation capacity of new energy sources and improve energy utilization efficiency. Attached Figure Description

[0054] Figure 1 is a flowchart of a local power grid active power coordination control method that considers the differences in dynamic characteristics of source, load and storage in an embodiment of the present invention. Detailed Implementation

[0055] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0056] Example 1

[0057] This embodiment provides a local power grid active power coordination control method that considers the differences in dynamic characteristics between power source, load, and storage. As shown in Figure 1, it includes the following steps:

[0058] Step 1: Obtain the raw power data of the local power grid, including the real-time power, adjustable upper limit, adjustable lower limit of each substation, as well as the real-time power and target power of the grid connection point.

[0059] Step Two: Calculate the allocation priority of each substation based on the pre-acquired dynamic characteristic parameters. Specifically:

[0060] The dynamic characteristic parameters include the response speed and adjustable power range of each substation;

[0061] Based on the pre-set weight parameters, the priority score of each sub-site is calculated and expressed as follows:

[0062] ;

[0063] in, This represents the priority score of the i-th substation. This represents the response speed of the i-th substation. This represents the adjustable power range of the i-th substation. Indicates the response speed weight. Indicates the weight of the adjustable power range. ;

[0064] The substations are sorted from highest to lowest priority score to generate allocation priorities.

[0065] Step 3: Calculate the total active power target value based on the real-time power of each substation, the real-time power at the grid connection point, and the target power at the grid connection point. Specifically:

[0066] The total active power target value is calculated and expressed as follows:

[0067] ;

[0068] in, express The target value of total active power at any given time. This represents the real-time power of the i-th substation, and N represents the number of substations. express Target power at the grid connection point at any given time. This indicates the real-time power at the grid connection point.

[0069] Step 4: Calculate the global power adjustment requirement based on the adjustable lower limit of each substation and the total active power target value. Specifically:

[0070] The global power demand is calculated and expressed as follows:

[0071] ;

[0072] in, express The global power requirement at any given time. express The target value of total active power at any given time. This represents the adjustable lower limit of the i-th substation.

[0073] Step 5: Calculate the target power reference value at the current moment based on the pre-acquired target power reference value. Specifically:

[0074] The hour is divided into several sampling points according to a set time interval. Each sampling point corresponds to a target power reference value, and the target power reference values ​​of adjacent sampling points before and after the current time are confirmed. In this embodiment, the next 4 hours are divided into a total of 48 sampling points with a 5-minute interval.

[0075] The target power reference value at the current moment is calculated using interpolation and expressed as follows:

[0076] ;

[0077] in, This represents the target power reference value of the i-th substation at the current time. This represents the target power reference value of the sampling point preceding the i-th substation. This represents the target power reference value of the sampling point after the i-th substation, and T represents the current time. This indicates the time of the next sampling point after the current time. It indicates the time of the previous sampling point.

[0078] Step Six: Based on the global required power and target power reference values, calculate the power target value for each substation according to the allocation priority. Specifically:

[0079] The substations are sorted according to the allocation priority, and the adjustable lower limit of each substation is used as the initial power target value of each substation.

[0080] When the type of the substation is wind power, photovoltaic, or energy storage, the substation is marked as having a target power reference value; otherwise, the substation is marked as not having a target power reference value.

[0081] When the substation has a target power reference value, the difference between the target power reference value and the initial power target value of the substation is calculated to obtain the first maximum adjustable power of the substation.

[0082] When the substation has no target power reference value, the difference between the adjustable upper limit of the substation and the initial power target value is used to obtain the first maximum adjustable power of the substation.

[0083] The smaller value between the global required power and the first maximum adjustable power is taken as the first actual allocated power of the substation. The global required power and the power target value of the substation are updated for the first time using the first actual allocated power, as expressed as:

[0084] ;

[0085] in, This represents the first actual allocated power of the i-th substation. This represents the first maximum adjustable power of the i-th substation. This represents the initial power target value for the i-th substation. express The global power requirement at any given time. This represents the power target value updated for the first time by the i-th substation. express The first update of the global power demand at any given moment;

[0086] Remark all substations with no target power reference values, and subtract the adjustable upper limit of the substation from the first updated power target value to obtain the second maximum adjustable power of the substation;

[0087] The smaller of the first updated global required power and the second maximum adjustable power is taken as the second actual allocated power of the substation. The global required power and the substation's power target value are then updated for the second time using the second actual allocated power, as follows:

[0088] ;

[0089] in, This represents the second actual allocated power of the i-th substation. This represents the second maximum adjustable power of the i-th substation. This represents the power target value updated for the second time at the i-th substation. express The global power demand is updated for the second time at this moment;

[0090] The power target value updated in the second update will be used as the final power target value.

[0091] Example 2

[0092] This embodiment provides a local power grid active power coordination control system that considers the differences in dynamic characteristics between power source, load, and storage, including:

[0093] The data acquisition module is used to acquire the raw power data of the local power grid, including the real-time power, adjustable upper limit, adjustable lower limit of each substation, as well as the real-time power and target power of the grid connection point.

[0094] The priority configuration module is used to calculate the allocation priority of each substation based on the pre-acquired dynamic characteristic parameters;

[0095] The first target value calculation module is used to calculate the total active power target value based on the real-time power of each substation, the real-time power of the grid connection point, and the target power of the grid connection point.

[0096] The global adjustable power calculation module is used to calculate the global adjustable power based on the adjustable lower limit of each substation and the total active power target value.

[0097] The reference value calculation module is used to calculate the target power reference value at the current moment based on the pre-acquired target power reference value;

[0098] The second target value calculation module is used to calculate the power target value of each substation according to the allocation priority based on the global required power and the target power reference value.

[0099] Example 3

[0100] This embodiment provides a local power grid active power coordination control device that considers the differences in dynamic characteristics between source, load, and storage, including a processor and a storage medium. The storage medium is used to store instructions. The processor is used to operate according to the instructions to execute the steps of the local power grid active power coordination control method considering the differences in dynamic characteristics between source, load, and storage described in Embodiment 1.

[0101] Example 4

[0102] This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the local power grid active power coordination control method considering the differences in dynamic characteristics of source, load, and storage as described in Embodiment 1.

[0103] 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.

[0104] 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, create means for implementing the functions specified in one or more blocks of the flowchart illustrations and / or one or more blocks of the block diagrams.

[0105] 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 that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0106] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0107] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for coordinated active power control of a local power grid considering the differences in dynamic characteristics of power source, load, and storage, characterized in that, include: The system acquires raw power data of the local power grid, including real-time power, adjustable upper limit, adjustable lower limit, real-time power at the grid connection point, and target power at the grid connection point. Based on pre-acquired dynamic characteristic parameters, it calculates the allocation priority of each substation. It then calculates the total active power target value based on the real-time power of each substation, the real-time power at the grid connection point, and the target power at the grid connection point. Finally, it calculates the global required power based on the adjustable lower limit of each substation and the total active power target value. Based on pre-acquired target power reference values, it calculates the target power reference value for the current moment. Finally, based on the global required power and the target power reference value, it calculates the power target value of each substation according to the allocation priority.

2. The local power grid active power coordination control method considering the differences in dynamic characteristics of source, load, and storage as described in claim 1, is characterized in that, The step of calculating the allocation priority of each substation based on pre-acquired dynamic characteristic parameters includes: the dynamic characteristic parameters including the response speed and adjustable power range of each substation; and calculating the priority score of each substation based on pre-set weight parameters, expressed as: ;in, This represents the priority score of the i-th substation. This represents the response speed of the i-th substation. This represents the adjustable power range of the i-th substation. Indicates response speed weight. Indicates the weight of the adjustable power range. The substations are sorted from highest to lowest priority score to generate allocation priorities.

3. The local power grid active power coordinated control method considering the differences in dynamic characteristics of source, load, and storage as described in claim 1, is characterized in that, The step of calculating the total active power target value based on the real-time power of each substation, the real-time power of the grid connection point, and the target power of the grid connection point includes: calculating the total active power target value, expressed as: ;in, express The target value of total active power at any given time. This represents the real-time power of the i-th substation, and N represents the number of substations. express Target power at the grid connection point at any given time. This indicates the real-time power at the grid connection point.

4. The local power grid active power coordination control method considering the differences in dynamic characteristics of source, load, and storage as described in claim 1, is characterized in that, The step of calculating the global adjustable power based on the adjustable lower limit of each substation and the total active power target value includes: calculating the global adjustable power, expressed as: ;in, express Global power demand at any given time express The target value of total active power at any given time. This represents the adjustable lower limit of the i-th substation.

5. The local power grid active power coordination control method considering the differences in dynamic characteristics of source, load, and storage as described in claim 1, is characterized in that, The step of calculating the target power reference value at the current moment based on the pre-acquired target power reference value includes: dividing each hour into several sampling points according to a set time interval, with each sampling point corresponding to a target power reference value; confirming the target power reference values ​​of adjacent sampling points before and after the current moment; and calculating the target power reference value at the current moment using interpolation, expressed as: ;in, This represents the target power reference value of the i-th substation at the current time. This represents the target power reference value of the sampling point preceding the i-th substation. This represents the target power reference value of the sampling point after the i-th substation, and T represents the current time. This indicates the time of the next sampling point after the current time. It indicates the time of the previous sampling point.

6. The local power grid active power coordinated control method considering the differences in dynamic characteristics of source, load, and storage as described in claim 1, is characterized in that, The calculation of the power target value of each substation based on the global demand power and target power reference value, according to the allocation priority, includes: sorting each substation according to the allocation priority, and using the adjustable lower limit of each substation as the initial power target value of each substation; when the type of the substation is wind power, photovoltaic, or energy storage, the substation is marked as having a target power reference value; otherwise, the substation is marked as having no target power reference value; when the substation has a target power reference value, the difference between the target power reference value and the initial power target value is calculated to obtain the first maximum adjustable power of the substation; when the substation has no target power reference value, the difference between the adjustable upper limit and the initial power target value is calculated to obtain the first maximum adjustable power of the substation; the smaller value between the global demand power and the first maximum adjustable power is used as the first actual allocated power of the substation, and the global demand power and the power target value of the substation are updated for the first time using the first actual allocated power, as expressed as: ;in, This represents the first actual allocated power of the i-th substation. This represents the first maximum adjustable power of the i-th substation. This represents the initial power target value for the i-th substation. express Global power demand at any given time This represents the power target value updated for the first time by the i-th substation. express The first update of the global adjustable power is performed; all substations are re-marked with no target power reference values; the difference between the adjustable upper limit of the substation and the first updated power target value is calculated to obtain the second maximum adjustable power of the substation; the smaller value between the first updated global adjustable power and the second maximum adjustable power is taken as the second actual allocated power of the substation; the global adjustable power and the power target value of the substation are updated for the second time using the second actual allocated power, as expressed as: ;in, This represents the second actual allocated power of the i-th substation. This represents the second maximum adjustable power of the i-th substation. This represents the power target value updated for the second time at the i-th substation. express The global power demand is updated for the second time; the power target value after the second update is used as the final power target value.

7. A local power grid active power coordination control system considering the differences in dynamic characteristics of source, load, and storage, characterized in that, include: The data acquisition module is used to acquire the raw power data of the local power grid, including the real-time power, adjustable upper limit, adjustable lower limit of each substation, as well as the real-time power and target power of the grid connection point; the priority configuration module is used to calculate the allocation priority of each substation based on the pre-acquired dynamic characteristic parameters. The first target value calculation module is used to calculate the total active power target value based on the real-time power of each substation, the real-time power of the grid connection point, and the target power of the grid connection point; the global adjustable power calculation module is used to calculate the global adjustable power based on the adjustable lower limit of each substation and the total active power target value; the reference value calculation module is used to calculate the target power reference value at the current moment based on the pre-acquired target power reference value. The second target value calculation module is used to calculate the power target value of each substation according to the allocation priority based on the global required power and the target power reference value.

8. A local power grid active power coordination control device considering the differences in dynamic characteristics of source, load, and storage, characterized in that, It includes a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of the local power grid active power coordination control method considering the differences in dynamic characteristics of source, load and storage 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 executed by the processor, the program implements the steps of the local power grid active power coordination control method that considers the differences in dynamic characteristics of source, load and storage as described in any one of claims 1 to 6.

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