Evaluation method and device for local absorption capability of distributed power supply, terminal equipment and storage medium

Abstract

The invention discloses a distributed power supply on-site consumption capability assessment method and device, terminal equipment and a storage medium, and the method comprises the steps: determining target equipment used for connecting each distributed power supply with a power distribution network bus according to a power grid topological structure, and obtaining the uploading power transmitted to the power distribution network bus by the distributed power supplies; and generating a total load time sequence curve of the to-be-evaluated area in the evaluation time period. It can be understood that when the electric quantity generated by the distributed power supply meets the electrical load in the region, and the energy storage equipment is charged to be in a full-power state, and when redundant electric quantity still exists, the redundant electric quantity is sent to the centralized power supply through the bus of the power distribution network. Therefore, the actual consumption electric quantity, including the sum of the user electricity consumption, the transmission loss electric quantity, the energy storage electric quantity and the like, of the to-be-evaluated area can be accurately calculated according to the up-supply electric quantity and the total power generation quantity, and then the in-situ consumption capacity of the distributed power supply of the to-be-evaluated area can be accurately evaluated.

Description

Technical Field

[0001] The present invention relates to the technical field of power grids, and in particular to an evaluation method, device, terminal device and storage medium for the in-situ consumption capacity of distributed power sources. Background Art

[0002] Distributed power sources refer to power sources that are connected to power grids with voltage levels of 35 kV and below, are located near users, and are mainly consumed in-situ at voltage levels of 35 kV and below. They include new energy power sources such as solar energy, natural gas, biomass energy, wind energy, water energy, hydrogen energy, geothermal energy, and ocean energy. With the rapid advancement of the construction of a new power system, new energy is gradually becoming the main body of the increment of power generation installed capacity and power generation. Therefore, higher requirements have been put forward for the in-situ consumption of distributed power sources in recent years.

[0003] In the field of distributed power source development and utilization, the in-situ consumption capacity of distributed power sources is a key indicator. However, the current evaluation methods for the in-situ consumption capacity of distributed power sources usually evaluate the in-situ consumption capacity of distributed power sources based on the power grid topology structure. For example, evaluating the in-situ consumption capacity of distributed power sources connected to a certain level of substation or line cannot evaluate the in-situ consumption capacity of distributed power sources in a certain administrative region or geographical scope, resulting in a lack of basis for investment decisions, access, and consumption boundaries for distributed power source developers, power grid enterprises, and official parties, and it is difficult to meet the requirements for the high-quality development of new energy and distribution networks.

[0004] Secondly, the current evaluation methods for the in-situ consumption capacity of distributed power sources usually adopt the direct method, which directly evaluates the in-situ consumption capacity of distributed power sources based on the power generation of distributed power sources and the electricity consumption data of the users they supply. However, firstly, due to the extremely large amount of user electricity consumption data and the problem of low data quality, and secondly, factors such as the loss of electricity during transmission and the stored electricity of energy storage devices are not considered during the evaluation process, resulting in inaccurate evaluation results for the in-situ consumption capacity of distributed power sources. Summary of the Invention

[0005] Embodiments of the present invention provide an evaluation method, device, terminal device and storage medium for the in-situ consumption capacity of distributed power sources, which can accurately evaluate the in-situ consumption capacity of distributed power sources in the area to be evaluated.

[0006] An embodiment of the present invention provides an evaluation method for the in-situ consumption capacity of distributed power sources, including:

[0007] Obtain the power grid topology structure of the area to be evaluated and the total power generation of several distributed power sources in the area to be evaluated during a preset evaluation period;

[0008] Determine several target devices for connecting each distributed power source to the distribution network bus according to the power grid topology structure;

[0009] Obtain the power flowing through several of the target devices during the evaluation period, and generate a total load time series curve of the area to be evaluated during the evaluation period; wherein, the power includes: the power fed upward by the distributed power source to the distribution network bus.

[0010] Calculate the total upward-fed electricity of the area to be evaluated during the evaluation period according to the total load time series curve.

[0011] Calculate the actual absorbed electricity of the area to be evaluated during the evaluation period according to the total upward-fed electricity and the total power generation.

[0012] Determine the in-situ absorption capacity of the distributed power sources in the area to be evaluated according to the actual absorbed electricity.

[0013] Furthermore, obtaining the total power generation of several distributed power sources in the area to be evaluated during a preset evaluation period includes:

[0014] Obtain the power generation of each distributed power source during the preset evaluation period.

[0015] Calculate the total power generation of several distributed power sources in the area to be evaluated during the preset evaluation period through the following formula:

[0016]

[0017] wherein, G is the total power generation, G θ is the power generation of the θ-th distributed power source in the area to be evaluated, and A is the total number of distributed power sources in the area to be evaluated.

[0018] Furthermore, the power also includes: the downward power supplied by the centralized power source to the area to be evaluated through the distribution network bus.

[0019] The obtaining the power flowing through several of the target devices during the evaluation period and generating the total load time series curve of the area to be evaluated during the evaluation period includes:

[0020] Define the downward power as a positive value and the upward power as a negative value, and generate a load curve of each target device during the evaluation period.

[0021] Superimpose several load curves to generate the total load time series curve of the area to be evaluated during the evaluation period.

[0022] Furthermore, the calculating the total upward-fed electricity of the area to be evaluated during the evaluation period according to the total load time series curve includes:

[0023] Define the period in the total load time series curve of the evaluation period that is below the preset baseline as the upload period, and define the period in the total load time series curve of the evaluation period that is not lower than the preset baseline as the downfeed period;

[0024] According to the upload period, integrate the upload curve corresponding to the upload period in the total load time series curve to calculate the total upload power of the area to be evaluated during the evaluation period.

[0025] Further, the step of integrating the upload curve corresponding to the upload period in the total load time series curve according to the upload period to calculate the total upload power of the area to be evaluated during the evaluation period includes:

[0026] Calculate the total upload power of the area to be evaluated during the evaluation period through the following formula:

[0027]

[0028] where G E is the total upload power, t α is the start time of the upload period, t β is the end time of the upload period, and L(t) is the total load time series curve.

[0029] Further, determining the in-situ consumption capacity of the distributed power sources in the area to be evaluated according to the actual consumption power includes:

[0030] Calculate the in-situ consumption rate of the distributed power sources in the area to be evaluated according to the actual consumption power;

[0031] Determine the in-situ consumption capacity of the distributed power sources in the area to be evaluated according to the in-situ consumption rate of the distributed power sources.

[0032] Further, calculating the in-situ consumption rate of the distributed power sources in the area to be evaluated according to the actual consumption power includes:

[0033] Calculate the in-situ consumption rate of the distributed power sources in the area to be evaluated according to the following formula:

[0034]

[0035] where G R is the in-situ consumption rate of the distributed power sources, G-G E is the actual consumption power, G E is the total upload power, and G is the total power generation.

[0036] Another embodiment of the present invention provides an evaluation device for the in-situ consumption capacity of distributed power sources, including:

[0037] A data acquisition module, configured to acquire the power grid topology of the area to be evaluated, and the total power generation of a plurality of distributed power sources within the area to be evaluated during a preset evaluation period;

[0038] A target device determination module, configured to determine a plurality of target devices for connecting each distributed power source to the distribution network bus according to the power grid topology;

[0039] A load curve generation module, configured to acquire the power flowing through a plurality of the target devices during the evaluation period, and generate a total load time series curve of the area to be evaluated during the evaluation period; wherein the power includes: the upward power sent by the distributed power source to the distribution network bus;

[0040] An upward power calculation module, configured to calculate the total upward power of the area to be evaluated during the evaluation period according to the total load time series curve;

[0041] A consumed power calculation module, configured to calculate the actual consumed power of the area to be evaluated during the evaluation period according to the total upward power and the total power generation;

[0042] A consumption capacity evaluation module, configured to determine the in-situ consumption capacity of the distributed power sources in the area to be evaluated according to the actual consumed power.

[0043] Another embodiment of the present invention provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements an evaluation method for the in-situ consumption capacity of distributed power sources as described in any one of the above embodiments.

[0044] Another embodiment of the present invention provides a storage medium, which includes a stored computer program. When the computer program runs, it controls the device where the storage medium is located to execute an evaluation method for the in-situ consumption capacity of distributed power sources as described in any one of the above embodiments.

[0045] By implementing the present invention, the following beneficial effects are achieved:

[0046] The present invention discloses an evaluation method, device, terminal device and storage medium for the in-situ consumption capacity of distributed power sources. The method determines target devices for connecting each distributed power source to the distribution network bus according to the power grid topology, and then obtains the power fed upward by the distributed power source to the distribution network bus, and generates a total load time series curve of the area to be evaluated during the evaluation period. It can be understood that when the electricity generated by the distributed power source satisfies the electricity load in the area and there is still surplus electricity after charging the energy storage device to a fully charged state, the surplus electricity will be fed upward through the distribution network bus. Therefore, according to the fed-up electricity and the total power generation, the actual consumed electricity in the area to be evaluated, including user electricity consumption, transmission loss electricity, energy storage electricity, etc., can be accurately calculated, and then the in-situ consumption capacity of the distributed power sources in the area to be evaluated can be accurately evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 FIG. is a schematic flow chart of an evaluation method for the in-situ consumption capacity of distributed power sources provided by an embodiment of the present invention.

[0048] Figure 2 FIG. is a schematic structural diagram of an evaluation device for the in-situ consumption capacity of distributed power sources provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0052] Reference to "embodiment" in this text means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears at various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0054] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0056] See Figure 1 , which is a schematic flow chart of a method for evaluating the in-situ consumption capacity of distributed power sources provided by an embodiment of the present invention, including:

[0057] S1. Obtain the power grid topology of the area to be evaluated and the total power generation of several distributed power sources in the area to be evaluated during a preset evaluation period;

[0058] Preferably, obtaining the total power generation of several distributed power sources in the area to be evaluated during a preset evaluation period includes:

[0059] S11. Obtain the power generation of each distributed power source during a preset evaluation period;

[0060] S12. Calculate the total power generation of several distributed power sources in the area to be evaluated during a preset evaluation period through the following formula:

[0061]

[0062] where G is the total power generation, and G θ is the power generation of the θ-th distributed power source in the area to be evaluated, and A is the total number of distributed power sources in the area to be evaluated.

[0063] In a preferred embodiment of the present invention, according to Article 9.4 of the "Guidelines for Assessing the Grid Connection Carrying Capacity of Distributed Power Sources" (DL / T 2041-2019), that is, "if the area to be evaluated has reverse power flow to the grid of 220 kV and above due to distributed power sources, the evaluation level of this area should be red", it is advisable to use the county-level administrative region as the smallest evaluation unit. Therefore, in this embodiment, the county-level administrative region is used as the area to be evaluated, and the geographical wiring diagram of the distribution network in this area is obtained. It should be noted that, according to needs, other levels of administrative regions can also be used as the area to be evaluated, or the area to be evaluated can be divided according to factors such as geographical location.

[0064] The evaluation period can be set to 24 hours to evaluate the in-situ consumption capacity of distributed power sources in the county-level administrative region throughout the day, so as to provide a basis for investment decisions, grid access, and consumption boundaries, etc. Or it can be set to specific time periods, such as the morning period, the afternoon period, or the time period corresponding to the eight-hour working hours, to evaluate the in-situ consumption capacity of distributed power sources in the county-level administrative region during special time periods, so as to provide a basis for power dispatching strategies, etc.

[0065] S2. Determine a number of target devices for connecting each distributed power source to the distribution network bus according to the grid topology structure;

[0066] In a preferred embodiment of the present invention, taking the county-level administrative region as a unit, obtaining the geographical wiring diagram of the distribution network in this area, the key devices involved in calculating the in-situ consumption rate of distributed power sources include but are not limited to: 1) the main transformer in the 110(66) kV substation; 2) the main transformer in the 35 kV substation directly connected by the 220 kV substation; 3) the 10 kV distribution line directly connected by the 220 kV substation.

[0067] S3. Obtain the power flowing through a number of the target devices during the evaluation period, and generate the total load time series curve of the area to be evaluated during the evaluation period; where the power includes: the upward power sent by the distributed power source to the distribution network bus;

[0068] Preferably, the power further includes: the downward power supplied by the centralized power source to the area to be evaluated through the distribution network bus;

[0069] The obtaining of the power flowing through a number of the target devices during the evaluation period and generating the total load time series curve of the area to be evaluated during the evaluation period includes:

[0070] S31. Define the downward supply power as a positive value and the upward transmission power as a negative value, and generate the load curves of each target device during the evaluation period.

[0071] S32. Superimpose several load curves to generate the total load time series curve of the area to be evaluated during the evaluation period.

[0072] In a preferred embodiment of the present invention, modern information technology means such as SCADA systems and smart meters are used to continuously monitor the load of the above-mentioned substation and medium-voltage distribution lines and collect load data. Then, in accordance with the relevant regulations of the power system, the power flowing out of the bus is positive and the power flowing into the bus is negative. The collected load data is sorted by time series and plotted into a device time series load curve graph. The device time series load curve graph can intuitively display the load changes in each time period, especially whether it is upward transmission or downward supply, providing a basis for subsequent superposition analysis. The data frequency can be selected as the whole hour, 15 minutes or 5 minutes according to needs.

[0073] Superimpose the load curves of all key device collection points according to the following formula to form the total load time series curve of this area:

[0074]

[0075] where, L(t) is the load value of the total load time series curve at time t; L i-100(66) (t) is the load value of the i-th 110(66) kV key device collection point at time t; L j-35 (t) is the load value of the j-th 35 kV key device collection point at time t; L k-10 (t) is the load value of the k-th 10 kV key device collection point at time t; N is the number of 110(66) kV key device collection points; M is the number of 35 kV key device collection points; R is the number of 10 kV key device collection points.

[0076] S4. Calculate the total upward transmission power of the area to be evaluated during the evaluation period according to the total load time series curve;

[0077] Preferably, the calculating the total upward transmission power of the area to be evaluated during the evaluation period according to the total load time series curve includes:

[0078] S41. Define the time period in the total load time series curve of the evaluation period that is lower than the preset reference line as the upward transmission period, and define the time period in the total load time series curve of the evaluation period that is not lower than the preset reference line as the downward supply period;

[0079] S42. Integrate the upload curve corresponding to the upload period in the total load time series curve according to the upload period, and calculate the total upload power of the area to be evaluated during the evaluation period.

[0080] Preferably, the step of integrating the upload curve corresponding to the upload period in the total load time series curve according to the upload period to calculate the total upload power of the area to be evaluated during the evaluation period includes:

[0081] S421. Calculate the total upload power of the area to be evaluated during the evaluation period through the following formula:

[0082]

[0083] where G E is the total upload power, t α is the start time of the upload period, t β is the end time of the upload period, and L(t) is the total load time series curve.

[0084] In a preferred embodiment of the present invention, the centralized power source is connected to a voltage level of 110(66) kV or above. When the output of the centralized power source passes through the 110(66) kV main transformer, all distributed power sources within the power supply range of this main transformer are consumed locally, and there is no upload situation, that is, the local consumption rate of the distributed power source is 100%; when the output of the centralized power source does not pass through the 110(66) kV main transformer, the output of the distributed power source is greater than the load, and the main transformer power is uploaded. The time when it flows through the main transformer is the upload time, and the corresponding power is the upload power. The upload power can be calculated by integrating the power and time.

[0085] In the same county-level administrative region, there may be a situation where some 110(66) kV main transformers are uploading and some 110(66) kV main transformers are supplying power downward at the same time. Considering the interference or influence of the downward power supply of the centralized power source on the calculation of the local consumption power of the distributed power source, based on the boundary condition of "no reverse power transmission to the 220 kV and above power grid caused by the distributed power source", the load time series curves of all 110(66) kV main transformers are superimposed to form a virtual main transformer time series curve (total load time series curve). After integrating the virtual main transformer upload power and time, it is the total upload power of this county-level administrative region.

[0086] S5. Calculate the actual consumption power of the area to be evaluated during the evaluation period according to the total upload power and the total power generation;

[0087] S6. Determine the local consumption capacity of the distributed power source in the area to be evaluated according to the actual consumption power.

[0088] Preferably, determining the in-situ consumption capacity of distributed power sources in the area to be evaluated according to the actual absorbed power includes:

[0089] S61. Calculating the in-situ consumption rate of distributed power sources in the area to be evaluated according to the actual absorbed power;

[0090] Preferably, calculating the in-situ consumption rate of distributed power sources in the area to be evaluated according to the actual absorbed power includes:

[0091] S611. Calculating the in-situ consumption rate of distributed power sources in the area to be evaluated according to the following formula:

[0092]

[0093] where G R is the in-situ consumption rate of distributed power sources, G - G E is the actual absorbed power, G E is the total power transmitted upward, and G is the total power generation.

[0094] S62. Determining the in-situ consumption capacity of distributed power sources in the area to be evaluated according to the in-situ consumption rate of distributed power sources.

[0095] In a preferred embodiment of the present invention, the total power generation of distributed power sources is decomposed into two parts: in-situ consumption power and transmitted power, and based on this, the in-situ consumption capacity of distributed power sources is evaluated. The in-situ consumption rate of distributed power sources is a value between 0 and 1. The larger the value, the higher the in-situ consumption capacity of distributed power sources; the smaller the value, the lower the in-situ consumption capacity of distributed power sources. Further, the core of the in-situ consumption rate of distributed power sources lies in the matching of power sources and loads. The development layout and construction timing of distributed power sources should fully consider the local load level and characteristics. Improving system flexibility can also play an important role. Through the power market (ancillary services or demand response), the matching between the user load curve and the distributed power source output curve can be guided. In addition, energy storage technology can also play an important role. By shifting the power consumption, the transmitted power can be reduced, the shape of the load time series curve can be changed, and the in-situ consumption rate of distributed power sources can be improved.

[0096] This embodiment provides an evaluation method for the in-situ consumption capacity of distributed power sources. By determining the target devices for connecting each distributed power source to the distribution network bus according to the grid topology, the upward power sent by the distributed power source to the distribution network bus is obtained, and the total load time series curve of the area to be evaluated during the evaluation period is generated. It can be understood that when the electricity generated by the distributed power source satisfies the electricity load in the area and there is still surplus electricity after charging the energy storage device to a full charge state, the surplus electricity will be sent upward through the distribution network bus. Therefore, according to the upward electricity and the total power generation, the actual consumed electricity in the area to be evaluated, including user electricity consumption, transmission loss electricity, energy storage electricity, etc., can be accurately calculated, and then the in-situ consumption capacity of the distributed power source in the area to be evaluated can be accurately evaluated.

[0097] See Figure 2 , which is a schematic structural diagram of an evaluation device for the in-situ consumption capacity of a distributed power source provided by an embodiment of the present invention, includes:

[0098] A data acquisition module, configured to acquire the grid topology of the area to be evaluated and the total power generation of several distributed power sources in the area to be evaluated during a preset evaluation period;

[0099] A target device determination module, configured to determine several target devices for connecting each distributed power source to the distribution network bus according to the grid topology;

[0100] A load curve generation module, configured to acquire the power flowing through several of the target devices during the evaluation period and generate the total load time series curve of the area to be evaluated during the evaluation period; wherein the power includes the upward power sent by the distributed power source to the distribution network bus;

[0101] An upward electricity calculation module, configured to calculate the total upward electricity of the area to be evaluated during the evaluation period according to the total load time series curve;

[0102] A consumed electricity calculation module, configured to calculate the actual consumed electricity of the area to be evaluated during the evaluation period according to the total upward electricity and the total power generation;

[0103] An in-situ consumption capacity evaluation module, configured to determine the in-situ consumption capacity of the distributed power source in the area to be evaluated according to the actual consumed electricity.

[0104] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the attached drawings of the device embodiments provided by the present invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0105] Those skilled in the art can clearly understand that for the sake of convenience and brevity, the specific working process of the device described above can refer to the corresponding process in the foregoing method embodiment, and will not be elaborated here.

[0106] Another preferred embodiment of the present invention provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements an evaluation method for the local consumption capacity of distributed power as described in any one of the above embodiments.

[0107] The terminal device can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory.

[0108] The so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The processor is the control center of the terminal device, and connects various parts of the entire terminal device through various interfaces and lines.

[0109] The memory can be used to store the computer program. By running or executing the computer program stored in the memory and invoking the data stored in the memory, the processor realizes various functions of the terminal device. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function, etc.; the data storage area can store data created according to the use of the mobile phone, etc. In addition, the memory can include high-speed random access memory, and can also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

[0110] Another preferred embodiment of the present invention provides a storage medium. The storage medium is a computer-readable storage medium, and the computer program is stored in the computer-readable storage medium. When the computer program is executed by a processor, the steps of the above various method embodiments can be realized. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0111] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A method for evaluating the local consumption capacity of distributed power sources, characterized in that: include: Obtaining the power grid topology of the area to be evaluated and the total power generation of a number of distributed power sources in the area to be evaluated within a preset evaluation period; According to the power grid topology, determining a number of target devices for connecting each distributed power source to a distribution network bus; The power flowing through the target devices during the evaluation period is obtained to generate a total load time series curve of the area to be evaluated during the evaluation period; wherein the power includes: the power sent by the distributed power source to the distribution network bus; Calculating the total power transmission of the to-be-evaluated area within the evaluation period according to the total load time series curve; Calculate the actual amount of electricity consumed by the area to be evaluated during the evaluation period according to the total amount of electricity transmitted and the total amount of power generated; The on-site consumption capacity of the distributed power source in the area to be evaluated is determined based on the actual amount of power consumed.

2. The method for evaluating the local consumption capacity of distributed power sources according to claim 1, characterized in that: Obtaining the total power generation of a number of distributed power sources in the area to be evaluated within a preset evaluation period, including: Obtaining the power generation of each of the distributed power sources within a preset evaluation period; The total power generation of several distributed power sources in the area to be evaluated during the preset evaluation period is calculated by the following formula: Wherein, G is the total power generation, G θ is the power generation of the θth distributed power source in the area to be evaluated, and A is the total number of distributed power sources in the area to be evaluated.

3. A method for evaluating the local consumption capacity of distributed power sources as claimed in claim 2, characterized in that: The power also includes: the downstream power supplied by the centralized power supply to the area to be evaluated through the distribution network bus; The acquiring the power flowing through the target devices during the evaluation period and generating a total load time series curve of the area to be evaluated during the evaluation period includes: The downward power is defined as a positive value, and the upward power is defined as a negative value, and a load curve of each target device in the evaluation period is generated; Several load curves are superimposed to generate a total load time series curve of the area to be evaluated within the evaluation period.

4. A method for evaluating the local consumption capacity of distributed power sources as claimed in claim 3, characterized in that: The calculating, according to the total load time series curve, the total power transmission of the to-be-evaluated area within the evaluation period comprises: The time period of the total load time series curve of the evaluation period that is lower than the preset baseline is defined as the up-supply period, and the time period of the total load time series curve of the evaluation period that is not lower than the preset baseline is defined as the down-supply period; According to the transmission period, the transmission curve corresponding to the transmission period in the total load time series curve is integrated to calculate the total transmission power of the area to be evaluated within the evaluation period.

5. A method for evaluating the local consumption capacity of distributed power sources as claimed in claim 4, characterized in that: According to the transmission period, integrating the transmission curve corresponding to the transmission period in the total load time series curve to calculate the total transmission amount of the area to be evaluated in the evaluation period, includes: The total power transmission of the area to be evaluated during the evaluation period is calculated by the following formula: Among them, G E is the total power transmitted, t α is the starting time of the upload period, t β is the end time of the uploading period, and L(t) is the total load timing curve.

6. A method for evaluating the local consumption capacity of distributed power sources as claimed in claim 5, characterized in that: According to the actual amount of electricity consumed, the local consumption capacity of the distributed power source in the area to be evaluated is determined, including: Calculate the local consumption rate of distributed power in the area to be evaluated based on the actual power consumption; According to the local consumption rate of the distributed power sources, the local consumption capacity of the distributed power sources in the area to be evaluated is determined.

7. A method for evaluating the local consumption capacity of distributed power sources as claimed in claim 6, characterized in that: According to the actual power consumption, the local power consumption rate of the distributed power source in the area to be evaluated is calculated, including: According to the following formula, the local consumption rate of distributed power generation in the area to be evaluated is calculated: Among them, G R is the local consumption rate of the distributed generation, GG E is the actual power consumption, G E is the total amount of electricity transmitted, and G is the total amount of power generated.

8. A device for evaluating the local consumption capacity of distributed power sources, characterized in that: include: A data acquisition module is used to acquire the power grid topology of the area to be evaluated and the total power generation of several distributed power sources in the area to be evaluated within a preset evaluation period; A target device determination module, used to determine a number of target devices for connecting each distributed power source to a distribution network bus according to the power grid topology; A load curve generating module is used to obtain the power flowing through the target devices during the evaluation period, and generate a total load time series curve of the area to be evaluated during the evaluation period; wherein the power includes: the power sent by the distributed power source to the distribution network bus; A transmission power calculation module, used to calculate the total transmission power of the area to be evaluated within the evaluation period according to the total load time series curve; An electricity consumption calculation module, used to calculate the actual electricity consumption of the area to be evaluated within the evaluation period according to the total transmitted electricity and the total power generation; The absorption capacity evaluation module is used to determine the local absorption capacity of the distributed power source in the area to be evaluated based on the actual amount of electricity absorbed.

9. A terminal device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, a method for evaluating the on-site absorption capacity of distributed power sources as described in any one of claims 1 to 7 is implemented.

10. A storage medium, characterized in that: The storage medium includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute a method for evaluating the on-site absorption capacity of distributed power sources as described in any one of claims 1 to 7.

Images