Distributed photovoltaic district simulation platform and method considering energy consumption evaluation

Abstract

The application discloses a distributed photovoltaic district simulation platform and method considering energy consumption evaluation. The platform comprises a data management module, which is used for processing received topological parameter information of a distributed photovoltaic district; a metering topological analysis center station, which is used for topological calculation of the topological parameter information and generation of a topological architecture; and a photovoltaic measurement application center station, which is used for measurement evaluation of the topological parameter information. Thus, planning capability is provided for the distributed photovoltaic.

Description

Technical Field

[0001] This application relates to the field of distributed photovoltaic (PV) transformer area detection technology, and in particular to a distributed PV transformer area simulation platform and method that takes into account energy consumption evaluation. Background Technology

[0002] With the introduction of the important strategic goals of "carbon peaking and carbon neutrality," my country's energy sector has begun to shift towards renewable energy development, primarily based on distributed photovoltaic (PV) power. Large-scale grid connection of distributed PV will pose significant challenges to power system planning and operation. In engineering projects, the planning of distributed PV distribution areas generally only considers geographical location and solar irradiance. Furthermore, a large number of enterprises and individual users within the power system install small-capacity PV systems, resulting in high-capacity distributed PV concentrated in certain areas of the power system, while low-capacity distributed PV is dispersed throughout the system. This situation mainly has the following two impacts:

[0003] 1) Evaluation of Distributed Photovoltaic Power Consumption. In some areas, photovoltaic designs did not take into account the users' consumption capacity. A large amount of distributed photovoltaic power output cannot be effectively consumed in the power system. A large amount of photovoltaic power is input into the power system through the distribution network. It is necessary to plan the construction method of distributed photovoltaic based on the power generation, load and grid architecture parameters in the power system.

[0004] 2) Voltage Sudden Changes and Loss Anomalies Analysis. The output power of a large number of distributed photovoltaic (PV) systems is random. This random power will cause voltage rise at some nodes in the power system and will also lead to abnormal losses. It is necessary to predict the output curves of distributed PV under various weather conditions, simulate and calculate the voltage changes and loss magnitude of the power system, and provide early warning for PV distribution areas.

[0005] In summary, it is necessary to provide power companies with the planning capabilities for distributed photovoltaic (PV) systems, and to establish the ability to evaluate abnormal situations such as line losses, voltage rises, and reverse power transmission based on the operational status of distributed PV distribution areas. Summary of the Invention

[0006] This disclosure provides a simulation platform and method for distributed photovoltaic power station areas that takes into account energy consumption evaluation.

[0007] According to one aspect of this application, a distributed photovoltaic (PV) area simulation platform considering energy consumption assessment is provided for providing planning capabilities for distributed PV, characterized by comprising:

[0008] The data management module processes the topology parameter information received from the distributed photovoltaic power station area;

[0009] The metrological topology analysis platform is used to perform topology calculations on topology parameter information and generate topology architecture.

[0010] The photovoltaic measurement application platform is used to measure and evaluate topology parameter information.

[0011] Optionally, the data management module includes: a database, a data management unit, a data compensation unit, and a user center, wherein...

[0012] The database is used to store topology parameter information;

[0013] The data management unit is used to operate the database;

[0014] The data compensation unit is used to compensate for missing electrical energy data in the topology parameter information of the database;

[0015] The user center is used to configure user information and passwords for the software.

[0016] Optionally, the database includes a line parameter database, a load node parameter database, a generation node parameter database, a historical energy data database, an environmental parameter database, and an evaluation value database.

[0017] Optionally, the econometric topology analysis platform includes: an automatic topology editing unit, a topology display unit, and a power flow simulation calculation unit, wherein...

[0018] The automatic topology editing unit automatically generates the topology of a distributed photovoltaic power station based on topology parameter information.

[0019] The topology display unit is used to showcase the topology.

[0020] The power flow simulation calculation unit is used to perform power flow calculations based on topology parameters and power flow calculation parameters.

[0021] Optionally, the photovoltaic measurement application platform includes: line loss algorithm, power evaluation algorithm, and grid integration evaluation algorithm, among which...

[0022] The line loss algorithm is used to calculate the line loss of distributed photovoltaic power based on the results of power flow calculation.

[0023] The power evaluation algorithm is used to evaluate the voltage status of photovoltaic power generation nodes based on the results of power flow calculations;

[0024] The absorption evaluation algorithm is used to assess the absorption of distributed photovoltaic power output by the local load.

[0025] Optionally, the line loss algorithm includes calculations of transformer active power loss, transformer reactive power loss, bus active power loss, and bus reactive power loss, wherein...

[0026] Transformer active power loss = Transformer input active power - Transformer output active power;

[0027] Transformer reactive power loss = Transformer input reactive power - Transformer output reactive power;

[0028] Bus active power loss = Bus input active power - Bus output active power;

[0029] Bus reactive power loss = Bus input reactive power - Bus output reactive power.

[0030] Optionally, the operation of the power evaluation algorithm to evaluate the voltage status of photovoltaic power generation nodes based on the distributed photovoltaic power flow calculation results includes:

[0031] Assess whether the positive voltage deviation of the photovoltaic power generation node exceeds +10% of the rated voltage and whether the negative voltage deviation exceeds -7% of the rated voltage;

[0032] Assess the voltage amplitude of photovoltaic power generation nodes and the voltage amplitude of the grid nodes connected to them, and evaluate whether there are situations where the voltage of distributed photovoltaic and grid nodes is reversed.

[0033] Optionally, the operation of the absorption evaluation algorithm for assessing the absorption of distributed photovoltaic power output by the transformer area load includes:

[0034] Assess whether the difference between the minimum photovoltaic power generation and the maximum power consumption of the distributed photovoltaic area exceeds 80% of the transformer capacity of the area;

[0035] Evaluate whether the interpolation between the maximum photovoltaic power generation and the minimum load power consumption of the distributed photovoltaic area is greater than 0.

[0036] Optionally, it also includes: an interaction interface for connecting with the front-end system, receiving topology parameter information of the distributed photovoltaic area, and transmitting it to the data management module.

[0037] According to another aspect of this application, a simulation method for distributed photovoltaic (PV) distribution areas that takes into account energy consumption assessment is provided, including:

[0038] The topology architecture of the distributed photovoltaic power station is generated by calculating based on the pre-imported topology parameter information of the distributed photovoltaic power station.

[0039] Measure and evaluate the topological parameter information, and determine the evaluation results;

[0040] Based on the topology and evaluation results, the simulation results are determined.

[0041] Optionally, before calculating and generating the topology architecture of the distributed photovoltaic (PV) system based on pre-imported topology parameter information, the following steps are also included:

[0042] Data compensation is performed on the topology parameter information.

[0043] Optionally, the operation of measuring and evaluating the topology parameter information and determining the evaluation results includes:

[0044] The line loss of distributed photovoltaic power generation is calculated based on topology parameter information using a line loss algorithm.

[0045] The voltage status of photovoltaic power generation nodes is evaluated based on topology parameter information using an energy evaluation algorithm, and the node voltage evaluation result is determined.

[0046] The absorption evaluation algorithm is used to assess the absorption of distributed photovoltaic power output by the transformer area load based on topology parameter information;

[0047] The evaluation results are determined based on the line loss, node voltage evaluation results, and absorption capacity.

[0048] Therefore, the metering topology analysis platform provided in this application can automatically generate the topology of the distribution area based on the data management module and provide editing capabilities. It also provides measurement and evaluation of the electrical energy and voltage of distributed photovoltaic systems.

[0049] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this application in conjunction with the accompanying drawings. Attached Figure Description

[0050] The following sections will describe some specific embodiments of this application in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0051] Figure 1 This is a schematic diagram of a distributed photovoltaic power station simulation platform that takes into account energy consumption evaluation, as described in the embodiments of this application.

[0052] Figure 2 A schematic diagram of the simulation process of the distributed photovoltaic power station simulation platform that takes into account energy consumption evaluation provided in this application is shown.

[0053] Figure 3 A flowchart illustrating the distributed photovoltaic power station simulation method considering energy consumption evaluation provided in this application is shown. Detailed Implementation

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] To enable those skilled in the art to better understand the present disclosure, the technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present disclosure.

[0056] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0057] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0058] Example 1

[0059] Figure 1 This is a schematic perspective view of a distributed photovoltaic (PV) transformer area simulation platform considering energy consumption assessment according to an embodiment of this application. The distributed PV transformer area simulation platform considering energy consumption assessment generally includes:

[0060] The interactive interface is used to connect with the front-end system and receive topology parameter information of the distributed photovoltaic area;

[0061] The data management module, connected to the interaction interface, is used to process and store topology parameter information;

[0062] The metering topology analysis platform connects to the data management module and is used to perform topology calculations on topology parameter information to generate the topology architecture.

[0063] The photovoltaic measurement application platform connects to the measurement topology analysis platform and is used to measure and evaluate topology parameter information.

[0064] The interactive interface allows for offline input or online data import via Excel spreadsheets. The aforementioned software modules should be deployed in a modular fashion within the power company's main station. The software should interface with the electricity consumption information collection system, using the TCP / IP communication protocol for data exchange. When online deployment is not feasible, offline deployment is also possible. Operators input historical data into an Excel spreadsheet according to database requirements; the software will automatically read the spreadsheet and import the data into the database.

[0065] Therefore, the metering topology analysis platform provided in this application can automatically generate the topology of the distribution area based on the data management module and provide editing capabilities. It also provides measurement and evaluation of the electrical energy and voltage of distributed photovoltaic systems.

[0066] Optionally, Figure 2 This paper illustrates a schematic diagram of the simulation process of the distributed photovoltaic power station simulation platform that takes into account energy consumption assessment, as provided in this application. (Refer to...) Figure 1 and Figure 2 As shown, the data management module includes: a database, a data management unit, a data compensation unit, and a user center.

[0067] The database is used to store topology parameter information;

[0068] The data management unit is used to operate the database;

[0069] The data compensation unit is used to compensate for missing electrical energy data in the topology parameter information of the database;

[0070] The user center is used to configure user information and passwords for the software.

[0071] Among them, the topology parameters and power flow calculation parameters are imported by the user by filling in an EXCEL spreadsheet.

[0072] Optionally, the database includes a line parameter database, a load node parameter database, a generation node parameter database, a historical energy data database, an environmental parameter database, and an evaluation value database.

[0073] Specifically, the platform includes six databases: line parameter database, load node parameter database, generator node parameter database, historical energy data database, environmental parameter database, and evaluation value database. The planning methods for each database are shown in Appendices 1-6. When the imported data cannot fill the database, it will automatically be filled with default parameters.

[0074] Table 1. Line Parameter Database

[0075]

[0076]

[0077] Table 2 Load Node Parameters

[0078]

[0079] Table 3 - Power Generation Node Parameters

[0080]

[0081] Table 4. Node Simulation Output Power Generation Data

[0082]

[0083]

[0084] Table 5 Environmental Quantity Database (HistoryEn)

[0085]

[0086] Table 6 Evaluation Value Database (HistoryEn)

[0087]

[0088] Optionally, refer to Figure 1 and Figure 2 As shown, the metering topology analysis platform includes: an automatic topology editing unit, a topology display unit, and a power flow simulation calculation unit.

[0089] The automatic topology editing unit automatically generates the topology of a distributed photovoltaic power station based on topology parameter information.

[0090] The topology display unit is used to showcase the topology.

[0091] The power flow simulation calculation unit is used to perform power flow calculations based on topology parameters and power flow calculation parameters.

[0092] The topology display unit mainly showcases the deployment of distributed photovoltaic (PV) transformer substations within the jurisdiction of the power supply station. Users can query the distribution of distributed PV transformer substations within the region, the substations' connection to the power system, the distributed PV topology of the substations, details of electricity and electrical parameters at metering points, and PV consumption assessments.

[0093] Optionally, the photovoltaic measurement application platform includes: line loss algorithm, power evaluation algorithm, and grid integration evaluation algorithm, among which...

[0094] The line loss algorithm is used to calculate the line loss of distributed photovoltaic power based on the results of power flow calculation.

[0095] The power evaluation algorithm is used to evaluate the voltage status of photovoltaic power generation nodes based on the results of power flow calculations;

[0096] The load absorption evaluation algorithm is used to assess the absorption of distributed photovoltaic power output by the local transformer area.

[0097] In addition, it may include an advanced algorithm open software database interface to provide a platform for users to test algorithms and expand functionality.

[0098] The algorithm's data output should include both curves and numerical values.

[0099] Optionally, refer to Figure 1 and Figure 2 As shown, the line loss algorithm includes the calculation of transformer active power loss, transformer reactive power loss, bus active power loss, and bus reactive power loss.

[0100] Transformer active power loss = Transformer input active power - Transformer output active power;

[0101] Transformer reactive power loss = Transformer input reactive power - Transformer output reactive power;

[0102] Bus active power loss = Bus input active power - Bus output active power;

[0103] Bus reactive power loss = Bus input reactive power - Bus output reactive power.

[0104] Optionally, the operation of the power evaluation algorithm to evaluate the voltage status of photovoltaic power generation nodes based on the distributed photovoltaic power flow calculation results includes:

[0105] Assess whether the positive voltage deviation of the photovoltaic power generation node exceeds +10% of the rated voltage and whether the negative voltage deviation exceeds -7% of the rated voltage;

[0106] Assess the voltage amplitude of photovoltaic power generation nodes and the voltage amplitude of the grid nodes connected to them, and evaluate whether there are situations where the voltage of distributed photovoltaic and grid nodes is reversed.

[0107] Optionally, the operation of the absorption evaluation algorithm for assessing the absorption of distributed photovoltaic power output by the transformer area load includes:

[0108] Assess whether the difference between the minimum photovoltaic power generation and the maximum power consumption of the distributed photovoltaic area exceeds 80% of the transformer capacity of the area;

[0109] Assess whether the difference between the maximum photovoltaic power generation and the minimum power consumption of the distributed photovoltaic area is greater than 0.

[0110] Optionally, it also includes: an interaction interface for connecting with the front-end system, receiving topology parameter information of the distributed photovoltaic area, and transmitting it to the data management module.

[0111] Therefore, with the proposal of the important strategic goal of "carbon peaking and carbon neutrality", renewable new energy sources, mainly distributed photovoltaics, will be connected to the grid on a large scale. The distributed photovoltaic power station simulation platform provided in this application, which takes into account energy consumption evaluation, will provide a reference for the design and planning of distributed photovoltaic energy and has certain engineering significance.

[0112] Example 2

[0113] Figure 3 This application illustrates another aspect of a distributed photovoltaic (PV) system simulation method 300 that considers energy consumption assessment, comprising:

[0114] Step 301: Calculate and generate the topology architecture of the distributed photovoltaic power station based on the pre-imported topology parameter information of the distributed photovoltaic power station.

[0115] Step 302: Measure and evaluate the topology parameter information, and determine the evaluation results;

[0116] Step 303: Determine the simulation results based on the topology and evaluation results.

[0117] Optionally, before calculating and generating the topology architecture of the distributed photovoltaic (PV) system based on pre-imported topology parameter information, the following steps are also included:

[0118] Data compensation is performed on the topology parameter information.

[0119] Optionally, the operation of measuring and evaluating the topology parameter information and determining the evaluation results includes:

[0120] The line loss of distributed photovoltaic power generation is calculated based on topology parameter information using a line loss algorithm.

[0121] The voltage status of photovoltaic power generation nodes is evaluated based on topology parameter information using an energy evaluation algorithm, and the node voltage evaluation result is determined.

[0122] The absorption evaluation algorithm is used to assess the absorption of distributed photovoltaic power output by the transformer area load based on topology parameter information;

[0123] The evaluation results are determined based on the line loss, node voltage evaluation results, and absorption capacity.

[0124] For a detailed description of this embodiment, please refer to Embodiment 1, which will not be repeated here.

[0125] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0126] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0127] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0128] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A distributed photovoltaic (PV) distribution area simulation platform that considers energy consumption assessment, used to provide planning capabilities for distributed PV, characterized in that, include: The interactive interface is used to connect with the front-end system, receive topology parameter information of the distributed photovoltaic area, and transmit it to the data management module; The data management module is used to process the topology parameter information of the received distributed photovoltaic power station and to compensate for the missing electrical energy data. The metering topology analysis platform is used to perform topology calculations on the topology parameter information and generate a topology architecture. The metering topology analysis platform includes: an automatic topology editing unit, a topology display unit, and a power flow simulation calculation unit. The automatic topology editing unit automatically generates the topology of the distributed photovoltaic area using the topology parameter information. The topology display unit is used to display the topology. The power flow simulation calculation unit is used to perform power flow calculations based on the topology parameters and power flow calculation parameters. The photovoltaic measurement application platform is used to measure and evaluate the topological parameter information. The photovoltaic measurement application platform includes: a line loss algorithm, a power evaluation algorithm, and a power consumption evaluation algorithm, among which... The line loss algorithm is used to calculate the line loss of the distributed photovoltaic system based on the results of the power flow calculation. The power evaluation algorithm is used to evaluate the voltage status of photovoltaic power generation nodes based on the results of the power flow calculation. The absorption evaluation algorithm is used to assess the absorption of the distributed photovoltaic power output by the transformer area load. The line loss algorithm includes calculations of transformer active power loss, transformer reactive power loss, bus active power loss, and bus reactive power loss. Transformer active power loss = Transformer input active power - Transformer output active power; Transformer reactive power loss = Transformer input reactive power - Transformer output reactive power; Bus active power loss = Bus input active power - Bus output active power; Bus reactive power loss = Bus input reactive power - Bus output reactive power; The power assessment algorithm evaluates the voltage status of photovoltaic power generation nodes based on the distributed photovoltaic power flow calculation results, including: Assess whether the positive voltage deviation of the photovoltaic power generation node exceeds +10% of the rated voltage and whether the negative voltage deviation exceeds -7% of the rated voltage; Assess the voltage amplitude of the photovoltaic power generation node and the voltage amplitude of the grid node connected to it, and assess whether there is a situation where the voltage of the distributed photovoltaic and the grid node are reversed; The absorption evaluation algorithm is used to assess the absorption of distributed photovoltaic power by the local load, including: Assess whether the difference between the minimum photovoltaic power generation and the maximum power consumption of the distributed photovoltaic area exceeds 80% of the transformer capacity of the area; Evaluate whether the interpolation between the maximum photovoltaic power generation and the minimum load power consumption of the distributed photovoltaic area is greater than 0.

2. The distributed photovoltaic power station simulation platform considering energy consumption evaluation according to claim 1, characterized in that, The data management module includes: a database, a data management unit, a data compensation unit, and a user center. The database is used to store the topology parameter information; The data management unit is used to operate the database; The data compensation unit is used to compensate for the missing electrical energy data in the topology parameter information in the database; The user center is used to configure user information and passwords for the software.

3. The distributed photovoltaic power station simulation platform considering energy consumption evaluation according to claim 2, characterized in that, The database includes at least one of the following: line parameter database, load node parameter database, generation node parameter database, historical power data database, environmental parameter database, and evaluation value database.

4. A simulation method for distributed photovoltaic (PV) power grids that takes into account energy consumption evaluation, implemented based on the distributed PV power grid simulation platform that takes into account energy consumption evaluation as described in any one of claims 1-3, characterized in that, include: The topology architecture of the distributed photovoltaic power station is generated by calculating based on the pre-imported topology parameter information of the distributed photovoltaic power station. The topological parameter information is measured and evaluated to determine the evaluation result; Based on the topology and the evaluation results, the simulation results are determined.

5. The method according to claim 4, characterized in that, Before calculating and generating the topology architecture of a distributed photovoltaic (PV) system based on pre-imported topology parameters, the following steps are also included: Data compensation is performed on the topology parameter information.

6. The method according to claim 4, characterized in that, The operation of measuring and evaluating the topology parameter information and determining the evaluation result includes: The line loss of the distributed photovoltaic system is calculated based on the topology parameter information using a line loss algorithm. The voltage status of photovoltaic power generation nodes is evaluated based on the topology parameter information using an energy evaluation algorithm, and the node voltage evaluation result is determined. The absorption evaluation algorithm is used to assess the absorption of the distributed photovoltaic power output by the transformer area load based on the topology parameter information; The evaluation result is determined based on the line loss, the node voltage evaluation result, and the absorption status.

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