Method and system for controlling flexible interconnection topology of multi-port AC / DC hybrid power distribution network

Abstract

The invention discloses a multi-port AC / DC hybrid power distribution network flexible interconnection topology control method and system, and the method comprises the steps: obtaining the basic composition of a multi-port AC / DC hybrid power distribution network, the basic composition comprises an AC subnet, a DC subnet and an AC / DC interconnection part, and the AC / DC interconnection part comprises a converter, a connector and a controller; according to the analysis result of the regional power demand, the existing power grid structure and the renewable energy source distribution, the layout of an alternating current subnet and a direct current subnet is determined, and the layout comprises key nodes forming the subnets; based on the basic composition and the layout of the AC subnet and the DC subnet, a flexible interconnection topology of the multi-port AC / DC hybrid power distribution network is designed and generated; a control strategy including alternating current and direct current conversion process optimization, fault detection and processing and load prediction and response is developed for the flexible interconnection topology of the multi-port alternating current and direct current hybrid power distribution network, and the flexible interconnection topology of the multi-port alternating current and direct current hybrid power distribution network is controlled according to the control strategy.

Description

Technical Field

[0001] The present invention relates to the field of power grid control, and in particular to a control method, system, electronic device and computer-readable storage medium for a flexible interconnection topology of a multi-port AC / DC hybrid distribution network. Background Art

[0002] A hybrid AC (Alternating Current) / DC (Direct Current) distribution network is a power system that integrates AC and DC grid technologies, combining the strengths of both to optimize power transmission and distribution. In this system, AC and DC grids operate in parallel, with specialized converters (such as bidirectional converters) used to convert energy between AC and DC.

[0003] Hybrid AC / DC distribution networks can more efficiently integrate multiple energy sources, such as wind, solar (DC), and traditional thermal power (AC). This hybrid network allows for flexible access and optimized configuration of different power sources, enhancing the grid's adaptability to diverse energy mixes.

[0004] Multi-port interconnection in hybrid AC / DC distribution networks can not only integrate multiple energy sources but also improve system flexibility. However, current multi-port interconnection technology still has technical limitations and needs improvement in terms of conversion efficiency and cost, system complexity and control difficulty. Summary of the Invention

[0005] The object of the present invention is to provide a control method, system, electronic device and computer-readable storage medium for a multi-port AC / DC hybrid distribution network flexible interconnection topology.

[0006] To achieve the above-mentioned objectives, the present invention provides, in a first aspect, a control method for a flexible interconnection topology of a multi-port AC / DC hybrid distribution network, the method comprising: obtaining a basic structure of the multi-port AC / DC hybrid distribution network; wherein the basic structure comprises: an AC subnet, a DC subnet, and an AC / DC interconnection part, and the AC / DC interconnection part comprises: a converter, a connector, and a controller for converting between DC and AC, which are collectively used to realize energy exchange between the AC subnet and the DC subnet; determining the layout of the AC subnet and the DC subnet based on the analysis results of regional power demand, existing power grid structure, and renewable energy distribution; wherein the layout includes key nodes constituting the subnet, and the key nodes include: power plants and important load centers; based on the basic structure and the layout of the AC subnet and the DC subnet, designing and generating a flexible interconnection topology of the multi-port AC / DC hybrid distribution network; developing a control strategy for the flexible interconnection topology of the multi-port AC / DC hybrid distribution network, including AC / DC conversion process optimization, fault detection and processing, load forecasting and response, and controlling the flexible interconnection topology of the multi-port AC / DC hybrid distribution network according to the control strategy.

[0007] In some embodiments of the first aspect, the converter is produced using technology based on insulated gate bipolar transistors and is equipped with corresponding control rules to cope with load fluctuations and network failures; the connector is used to connect the physical interface of different power grid parts, has high conductivity and durability, and the setting method of the connector is determined in combination with the layout; the controller uses a preset predictive control model to predict the energy flow between the AC subgrid and the DC subgrid, and regulates the energy flow between the subgrids based on the energy flow.

[0008] In some embodiments of the first aspect, analyzing regional electricity demand includes:

[0009] Collect historical and forecasted electricity demand data within the target area, including peak loads, load fluctuation patterns, and seasonal variations;

[0010] Determine the short-term impact of special events or abnormal situations on electricity demand; special events or abnormal situations include holidays and extreme weather;

[0011] Determine the long-term impact of population growth, industrial development, and the application of new technologies on electricity demand;

[0012] The electricity demand data, short-term impact and long-term impact are used to predict the future electricity demand data of the target area through statistical models or machine learning algorithms.

[0013] In some embodiments of the first aspect, analyzing the existing power grid structure includes:

[0014] Assess the capacity, layout, and technical condition of the existing power grid, including substations, transmission lines, and distribution facilities;

[0015] Identify weaknesses and limitations in the existing grid, including aging infrastructure and areas with insufficient capacity;

[0016] Analyze the performance of existing power grids under high load or fault conditions, including abnormal areas where performance is substandard.

[0017] In some embodiments of the first aspect, analyzing the renewable energy distribution includes:

[0018] Assess the distribution and potential of renewable energy resources within the target area, including the geographic distribution and intensity of solar and wind energy resources;

[0019] Consider current and planned renewable energy projects, including the location and capacity of photovoltaic power plants and wind farms;

[0020] Analyze the potential and challenges of integrating current renewable energy sources into existing grids, including their variability, predictability, and distributed nature.

[0021] In some embodiments of the first aspect, determining the layout of the AC subgrid and the DC subgrid based on analysis results of regional power demand, existing grid structure, and renewable energy distribution includes:

[0022] Based on the analysis of regional power demand and renewable energy distribution, the layout of the AC and DC subgrids is designed, including:

[0023] Identify the main components of the AC subgrid, including large power plants, major substations, and critical transmission lines;

[0024] Identify the main components of the DC subgrid, including renewable energy generation locations, DC load centers, and DC transmission paths;

[0025] Identify key nodes of the AC and DC subnetworks, including the location information of major power stations, important load centers, and AC / DC conversion stations;

[0026] Based on the guiding principle of ensuring sufficient flexibility and redundancy to cope with future demand changes and potential failures, the connection method between each node of the AC subnet and DC subnet is determined.

[0027] In some embodiments of the first aspect, developing an optimized control strategy for an AC / DC conversion process includes: evaluating the performance of a current AC / DC conversion device and determining optimization goals and indicators based on the performance; employing control algorithms including fuzzy control, adaptive control, and pulse width modulation technology; integrating a real-time data monitoring system to dynamically adjust parameters during the conversion process; and testing and verifying each of the developed candidate optimized control strategies to obtain a target optimized control strategy that is effective and stable.

[0028] Develop control strategies for fault detection and handling, including: deploying highly sensitive sensors and monitoring equipment to monitor grid status in real time; developing fault detection algorithms based on pattern recognition and machine learning; formulating emergency response plans, including automatically isolating fault areas and redirecting power flows; and conducting simulation tests to verify the effectiveness of fault handling processes and obtain effective fault detection and handling procedures.

[0029] Develop processing and control strategies for load forecasting and response, including: collecting historical load data, including the impact of time, seasonality, weather, and special events; developing load forecasting models based on statistics and machine learning; integrating load forecasting models into power grid control systems and updating forecast results in real time; adjusting power grid operation strategies based on output load forecasts, including starting or shutting down certain power generation units and adjusting converter outputs.

[0030] To achieve the above-mentioned objectives, the present invention provides, in a second aspect, a control system for a flexible interconnection topology of a multi-port AC / DC hybrid distribution network, the system comprising: a first unit for obtaining the basic structure of the multi-port AC / DC hybrid distribution network; wherein the basic structure comprises: an AC subnet, a DC subnet, and an AC / DC interconnection part, and the AC / DC interconnection part comprises: a converter, a connector, and a controller for converting between DC and AC, which are collectively used to realize energy exchange between the AC subnet and the DC subnet; a second unit for determining the layout of the AC subnet and the DC subnet based on the analysis results of regional power demand, existing power grid structure, and renewable energy distribution; wherein the layout includes key nodes constituting the subnet, and the key nodes include: power plants and important load centers; a third unit for designing and generating a flexible interconnection topology of the multi-port AC / DC hybrid distribution network based on the basic structure and the layout of the AC subnet and the DC subnet; and a fourth unit for developing a control strategy for the flexible interconnection topology of the multi-port AC / DC hybrid distribution network, including AC / DC conversion process optimization, fault detection and processing, load forecasting and response, and controlling the flexible interconnection topology of the multi-port AC / DC hybrid distribution network according to the control strategy.

[0031] In some other embodiments of the second aspect, the converter is produced using technology based on insulated gate bipolar transistors and is combined with corresponding control rules to cope with load fluctuations and network failures; the connector is used to connect the physical interface of different parts of the power grid, has high conductivity and durability, and the setting method of the connector is determined in combination with the layout; the controller uses a preset predictive control model to predict the energy flow between the AC subgrid and the DC subgrid, and regulates the energy flow between the subgrids according to the energy flow.

[0032] In some other embodiments of the second aspect, the second unit includes a first subunit for analyzing regional power demand, the first subunit being specifically configured to:

[0033] Collect historical and forecasted electricity demand data within the target area, including peak loads, load fluctuation patterns, and seasonal variations;

[0034] Determine the short-term impact of special events or abnormal situations on electricity demand; special events or abnormal situations include holidays and extreme weather;

[0035] Determine the long-term impact of population growth, industrial development, and the application of new technologies on electricity demand;

[0036] The electricity demand data, short-term impact and long-term impact are used to predict the future electricity demand data of the target area through statistical models or machine learning algorithms.

[0037] In some other embodiments of the second aspect, the second unit includes a second subunit for analyzing an existing power grid structure, wherein the second subunit is specifically configured to:

[0038] Assess the capacity, layout, and technical condition of the existing power grid, including substations, transmission lines, and distribution facilities;

[0039] Identify weaknesses and limitations in the existing grid, including aging infrastructure and areas with insufficient capacity;

[0040] Analyze the performance of existing power grids under high load or fault conditions, including abnormal areas where performance is substandard.

[0041] In some other embodiments of the second aspect, the second unit includes a third subunit for analyzing renewable energy distribution, the third subunit being specifically configured to:

[0042] Assess the distribution and potential of renewable energy resources within the target area, including the geographic distribution and intensity of solar and wind energy resources;

[0043] Consider current and planned renewable energy projects, including the location and capacity of photovoltaic power plants and wind farms;

[0044] Analyze the potential and challenges of integrating current renewable energy sources into existing grids, including their variability, predictability, and distributed nature.

[0045] In some other embodiments of the second aspect, the second unit is specifically configured to:

[0046] Based on the analysis of regional power demand and renewable energy distribution, the layout of the AC and DC subgrids is designed, including:

[0047] Identify the main components of the AC subgrid, including large power plants, major substations, and critical transmission lines;

[0048] Identify the main components of the DC subgrid, including renewable energy generation locations, DC load centers, and DC transmission paths;

[0049] Identify key nodes of the AC and DC subnetworks, including the location information of major power stations, important load centers, and AC / DC conversion stations;

[0050] Based on the guiding principle of ensuring sufficient flexibility and redundancy to cope with future demand changes and potential failures, the connection method between each node of the AC subnet and DC subnet is determined.

[0051] In some other embodiments of the second aspect, the fourth unit includes a fourth subunit for developing an optimized control strategy for the AC / DC conversion process, the fourth subunit being specifically configured to evaluate the performance of the current AC / DC conversion device and determine optimization objectives and indicators based on the performance; employing control algorithms including fuzzy control, adaptive control, and pulse width modulation technology; integrating a real-time data monitoring system to dynamically adjust parameters during the conversion process; and obtaining a target optimized control strategy with effectiveness and stability by testing and verifying each of the formed alternative optimized control strategies.

[0052] The fourth unit includes a fifth subunit for developing a process control strategy for fault detection and handling. The fifth subunit is specifically used to: deploy highly sensitive sensors and monitoring equipment to detect the status of the power grid in real time; develop a fault detection algorithm based on pattern recognition and machine learning; formulate an emergency response plan, including automatically isolating the fault area and redirecting power flow; and verify the effectiveness of the fault handling process by conducting simulation tests to obtain an effective fault detection and handling process.

[0053] The fourth unit includes a sixth subunit for developing processing and control strategies for load forecasting and response. The sixth subunit is specifically used to: collect historical load data, including the impact of time, seasonality, weather and special events; develop a load forecasting model based on statistics and machine learning; integrate the load forecasting model into the power grid control system and update the forecast results in real time; adjust the power grid operation strategy according to the output load forecast, including starting or shutting down certain power generation units and adjusting the converter output.

[0054] To achieve the above-mentioned object, the present invention provides an electronic device in a third aspect, the electronic device comprising:

[0055] memory for storing computer programs;

[0056] A processor is configured to implement, when executing a computer program stored in a memory, the steps of the method for controlling a flexible interconnection topology of a multi-port AC / DC hybrid distribution network as described in any one of the embodiments of the first aspect above.

[0057] To achieve the above-mentioned objectives, the present invention provides, in a fourth aspect, a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, each step of controlling the flexible interconnection topology of a multi-port AC / DC hybrid distribution network as described in any embodiment of the first aspect above is implemented.

[0058] The control scheme for the flexible interconnection topology of a multi-port AC / DC hybrid distribution network provided by the present invention first obtains the basic structure of the multi-port AC / DC hybrid distribution network, then determines the layout of the AC subnet and the DC subnet based on the analysis results of regional power demand, existing power grid structure and renewable energy distribution, then designs and generates the flexible interconnection topology of the multi-port AC / DC hybrid distribution network based on the basic structure and the layout of the AC subnet and the DC subnet, and finally develops a control strategy for the flexible interconnection topology of the multi-port AC / DC hybrid distribution network, including AC / DC conversion process optimization, fault detection and processing, and load forecasting and response, and controls the flexible interconnection topology of the multi-port AC / DC hybrid distribution network according to the control strategy, thereby achieving good and effective control of the flexible interconnection topology of the multi-port AC / DC hybrid distribution network.

[0059] The present invention also provides a control system, electronic device and computer-readable storage medium with a flexible interconnection topology of a multi-port AC / DC hybrid distribution network, which have the above-mentioned beneficial effects and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0061] Figure 1 A flow chart of a control method for a flexible interconnection topology of a multi-port AC / DC hybrid distribution network provided by an embodiment of the present invention;

[0062] Figure 2 : is a schematic diagram showing a typical topological structure of an AC / DC hybrid distribution network;

[0063] Figure 3 A flow chart of a method for analyzing regional power demand, existing grid structure, and renewable energy distribution in a control method for a flexible interconnected topology of a multi-port AC / DC hybrid distribution network provided by an embodiment of the present invention;

[0064] Figure 4 A flow chart of a method for determining the layout of an AC subnet and a DC subnet in a control method for a flexible interconnection topology of a multi-port AC / DC hybrid distribution network provided by an embodiment of the present invention;

[0065] Figure 5 This is a structural block diagram of a control system for a multi-port AC / DC hybrid distribution network with flexible interconnection topology provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0066] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0067] See Figure 1 , Figure 1 A flowchart of controlling a flexible interconnection topology of a multi-port AC / DC hybrid distribution network provided by an embodiment of the present invention includes the following steps:

[0068] Step 101: Obtain the basic structure of a multi-port AC / DC hybrid distribution network;

[0069] This step is intended to obtain the basic structure of the multi-port AC / DC hybrid distribution network by an execution subject (such as a local server or cloud server for data processing and analysis) suitable for executing the control method of the multi-port AC / DC hybrid distribution network flexible interconnection topology provided by the present invention. Specifically:

[0070] The multi-port AC / DC hybrid distribution network consists of an AC subnet, a DC subnet, and an AC / DC interconnection part (a typical AC / DC hybrid distribution network topology diagram can be found in Figure 2 ) The AC subgrid mainly includes traditional AC power sources (such as thermal power plants), AC loads and AC transmission lines; the DC subgrid includes DC power sources (such as solar photovoltaic panels, wind turbines), DC loads and DC transmission lines; the interconnection part includes converters (for AC / DC conversion), connectors and control systems to realize energy exchange between AC and DC subgrids.

[0071] Specifically, the converter is the core device for achieving AC and DC conversion, typically using technology based on IGBTs (insulated gate bipolar transistors). Converter design should consider high efficiency, low loss, and high reliability. In addition, advanced control strategies need to be integrated to cope with load fluctuations and network failures. Connectors are used to connect the physical interfaces of different grid sections and must meet high conductivity and durability requirements. Their layout in the system should be considered to ensure efficient connection in a multi-port environment. The control system is responsible for coordinating the energy flow between the AC and DC subgrids to ensure stable and efficient system operation. At the same time, advanced control algorithms (such as model-based predictive control) need to be adopted, and data analysis and real-time monitoring functions need to be integrated.

[0072] Step 102: Determine the layout of the AC subgrid and the DC subgrid based on the analysis results of the regional power demand, the existing grid structure, and the distribution of renewable energy;

[0073] Based on step 101, this step aims to enable the aforementioned executive entity to analyze regional power demand, existing grid structure, and renewable energy distribution, and then preliminarily plan the layout of AC and DC subgrids and identify key nodes (such as power plants and important load centers).

[0074] Step 103: Based on the basic structure and the layout of the AC subnet and the DC subnet, a multi-port AC / DC hybrid distribution network flexible interconnection topology is designed and generated;

[0075] Step 104: Develop a control strategy for the flexible interconnection topology of the multi-port AC / DC hybrid distribution network, including AC / DC conversion process optimization, fault detection and processing, and load forecasting and response, and control the flexible interconnection topology of the multi-port AC / DC hybrid distribution network according to the control strategy.

[0076] The control method for the flexible interconnection topology of a multi-port AC / DC hybrid distribution network provided by the present invention first obtains the basic structure of the multi-port AC / DC hybrid distribution network, then determines the layout of the AC subnet and the DC subnet based on the analysis results of regional power demand, existing power grid structure and renewable energy distribution, then designs and generates the flexible interconnection topology of the multi-port AC / DC hybrid distribution network based on the basic structure and the layout of the AC subnet and the DC subnet, finally develops a control strategy for the flexible interconnection topology of the multi-port AC / DC hybrid distribution network, including AC / DC conversion process optimization, fault detection and processing, load forecasting and response, and controls the flexible interconnection topology of the multi-port AC / DC hybrid distribution network according to the control strategy, thereby achieving good and effective control of the flexible interconnection topology of the multi-port AC / DC hybrid distribution network.

[0077] Please refer to Figure 3 , Figure 3 A flow chart of a method for analyzing regional power demand, existing grid structure, and renewable energy distribution in a control method for a flexible interconnected topology of a multi-port AC / DC hybrid distribution network provided by an embodiment of the present invention, specifically comprising the following steps:

[0078] Step 301: Collect historical and forecasted electricity demand data in the target area, including peak load, load fluctuation patterns, and seasonal variations;

[0079] Step 302: Determine the short-term impact of special events or abnormal conditions on electricity demand;

[0080] Step 303: Determine the long-term impact of population growth, industrial development, and new technology applications on electricity demand;

[0081] Step 304: Using the power demand data, short-term impact, and long-term impact, a statistical model or a machine learning algorithm is used to predict future power demand data for the target area.

[0082] Steps 301 to 304 are intended to analyze regional electricity demand, namely, first collecting historical and forecasted electricity demand data within the region, including peak load, load fluctuation patterns, seasonal changes, etc., and then considering the impact of special events or abnormal conditions (such as holidays, extreme weather) on electricity demand, as well as the long-term impact of factors such as population growth, industrial development, and the application of new technologies (such as electric vehicles) on electricity demand. Finally, statistical models or machine learning algorithms are used to predict future electricity demand trends.

[0083] Step 305: Assess the capacity, layout, and technical condition of the existing power grid, including substations, transmission lines, and distribution facilities;

[0084] Step 306: Identify weaknesses and limitations of the existing power grid, including aging facilities and areas with insufficient capacity;

[0085] Step 307: Analyze the performance of the existing power grid under high load or fault conditions, including abnormal areas where performance does not meet standards;

[0086] Steps 305 to 307 are intended to analyze the existing grid structure. First, the capacity, layout, and technical status of the existing grid, including substations, transmission lines, and distribution facilities, are assessed. Then, weaknesses and limitations of the grid, such as aging facilities and areas with insufficient capacity, are identified. Finally, a reliability and stability analysis is performed, i.e., the performance of the grid under high load or fault conditions is analyzed to determine areas that require improvement or strengthening.

[0087] Step 308: Assess the distribution and potential of renewable energy resources in the target area, including the geographical distribution and intensity of solar and wind energy resources;

[0088] Step 309: Consider current and planned renewable energy projects, including the location and capacity of photovoltaic power plants and wind farms;

[0089] Step 210: Analyze the potential and difficulty of integrating current renewable energy sources into the existing power grid, including their variability, predictability, and distributed characteristics.

[0090] Steps 308 to 210 are intended to analyze the distribution of renewable energy resources. First, the distribution and potential of renewable energy resources in the region are evaluated, such as the geographical distribution and intensity of solar and wind energy resources. Then, the location and capacity of existing and planned renewable energy projects, such as photovoltaic power stations and wind farms, are considered. Finally, the potential and challenges of integrating these renewable energy sources into the power grid are analyzed, including their variability, predictability, and distributed characteristics.

[0091] This embodiment also Figure 4The figure specifically provides a solution for how to implement preliminary planning of AC and DC subnets, including the following steps:

[0092] Step 401: Determine the main components of the AC subgrid, including large power plants, major substations, and key transmission lines;

[0093] Step 402: Determine the main components of the DC subgrid, including renewable energy generation locations, DC load centers, and DC transmission paths;

[0094] Step 403: Determine key nodes of the AC subnet and the DC subnet, including location information of major power stations, important load centers, and AC / DC conversion stations;

[0095] Step 404: Based on the guiding principle of ensuring sufficient flexibility and redundancy to cope with future demand changes and potential failures, determine the connection method between the nodes of the AC subnet and the DC subnet;

[0096] Flexibility refers to the system's ability to quickly adapt, adjust, and scale to future changes in demand. These changes may arise from factors such as load fluctuations, energy supply changes, and policy adjustments. Flexibility ensures that the system can continue to operate stably and meet growing or changing demands in a changing environment.

[0097] Redundancy refers to the inclusion of backup systems or paths in a design to enhance system reliability and fault tolerance. Redundancy ensures that if certain system components fail, the system can continue to operate normally through other paths or components, thereby reducing the risk of system downtime caused by single points of failure.

[0098] AC and DC subgrids are commonly found in power or energy networks, particularly in large-scale power systems or microgrids that utilize multiple energy transmission methods (e.g., AC and DC). The AC subgrid typically transmits high-frequency, low-voltage power, while the DC subgrid provides stable DC power, often used for efficient power conversion and transmission. In this context, AC and DC subgrids may intersect, forming a hybrid power network. The connection between the two subgrids determines the overall efficiency, stability, and scalability of the system.

[0099] Furthermore, a node refers to each independent part or device in a system that communicates with each other or transmits electrical energy through a connection. The connection between nodes can be physical (such as cables and wires) or data (such as information transmission protocols); the design of the connection method should take into account redundant connections, that is, designing multiple transmission paths between two main nodes to ensure that when one path fails, the other path can immediately take over to ensure the continuous operation of the system. In terms of flexibility, the connection method can include dynamic path switching or load balancing design, which can automatically adjust the current transmission path and direction according to load demand or fault conditions.

[0100] Addressing future demand changes means anticipating and responding to potential future demand changes during system design, including but not limited to load growth, fluctuations in energy demand, and changes in environmental policies. By pre-setting flexible connection methods, power flows can be adjusted as needed to meet the needs of different regions and loads.

[0101] Redundancy helps mitigate potential system failures. By adopting multi-path connectivity, redundant connections can maintain stable system operation and ensure uninterrupted power supply even if a node or path fails.

[0102] In practice, computer modeling and simulation techniques can be used to optimize the node connections between the AC and DC subgrids. Data analysis can predict load demands under different operating modes, and based on these predictions, appropriate redundant paths and flexible adjustment mechanisms can be designed. Connection options typically include parallel, series, and ring connections, each with its own advantages and disadvantages. Parallel connections provide greater redundancy but may increase system complexity and cost. Ring connections can enhance system flexibility and resilience, but the design must consider potential current overloads and thermal effects.

[0103] The core of this step lies in its systematic design philosophy, which aims to optimize the way the system connects its nodes to ensure it can effectively cope with future changes in demand and potential failures. This design not only ensures stable system operation but also improves the overall efficiency and reliability of the energy network. This design philosophy is forward-looking, as it not only considers the current operating status but also anticipates future challenges the system may face (e.g., future changes in energy demand and policy requirements for the energy network).

[0104] Step 405: Design the layout of the flow subnet and the DC subnet based on the above information.

[0105] That is, steps 401 to 405 are intended to involve the aforementioned executing entities first designing the layout of the AC and DC subgrids based on power demand and resource distribution, then determining the main components of the AC subgrid, such as large power plants, major substations, and key transmission lines, and then planning the DC subgrid, focusing on renewable energy generation locations, DC load centers, and DC transmission paths. Finally, key nodes are determined, including the locations of major power plants, important load centers (such as large industrial areas and commercial centers), and AC / DC conversion stations, while considering the connection methods between nodes to ensure sufficient flexibility and redundancy to cope with future demand changes and potential failures.

[0106] Based on any of the above embodiments, this example also provides a specific implementation method for step 104:

[0107] Control strategies play a crucial role in multi-port AC / DC hybrid distribution networks, ensuring efficient, stable, and reliable operation. The following are specific control strategies and their implementation steps:

[0108] 1. Optimize the AC / DC conversion process

[0109] Control strategy, implement real-time monitoring and dynamic adjustment mechanism to optimize AC / DC conversion efficiency; use advanced converter technology, such as PWM (pulse width modulation), to accurately control voltage and current and reduce losses.

[0110] Implementation steps:

[0111] Step 1: Evaluate the performance of current AC / DC converter equipment and determine optimization goals and indicators;

[0112] Step 2: Design and implement efficient control algorithms, such as fuzzy control or adaptive control, to improve conversion efficiency;

[0113] Step 3: Integrate a real-time data monitoring system to dynamically adjust parameters during the conversion process;

[0114] Step 4: Conduct testing and verification to ensure the effectiveness and stability of the control strategy.

[0115] 2. Fault detection and handling

[0116] Control strategies to implement fast and accurate fault detection mechanisms to enable timely response to grid anomalies; design fault isolation and system recovery processes to minimize the impact of faults.

[0117] Implementation steps:

[0118] Step 1: Deploy highly sensitive sensors and monitoring equipment to detect the status of the power grid in real time;

[0119] Step 2: Develop fault detection algorithms based on pattern recognition and machine learning to improve the speed and accuracy of fault diagnosis;

[0120] Step 3: Develop an emergency response plan, including automatically isolating the fault area and redirecting power flow;

[0121] Step 4: Conduct simulation tests to verify the effectiveness of the troubleshooting process;

[0122] 3. Load forecasting and response

[0123] Control strategies use advanced forecasting models to predict grid loads for more efficient energy management; based on the forecast results, power generation and distribution are adjusted to optimize grid operations.

[0124] Implementation steps:

[0125] Step 1: Collect historical load data, including the impact of time, seasonality, weather, and special events;

[0126] Step 2: Develop a load forecasting model based on statistics and machine learning;

[0127] Step 3: Integrate the prediction model into the power grid control system and update the prediction results in real time;

[0128] Step 4: Adjust the grid operation strategy based on the load forecast, such as starting or shutting down certain power generation units, adjusting the converter output, etc.

[0129] Because the situation is complicated, it is impossible to list them one by one for explanation. Those skilled in the art should be aware that there can be many examples based on the basic method principles provided by the present invention combined with actual conditions, and all of them should be within the scope of protection of the present invention without sufficient creative work.

[0130] See below Figure 5 , Figure 5 This is a structural block diagram of a control system 500 for a multi-port AC / DC hybrid distribution network with a flexible interconnection topology provided by an embodiment of the present invention. This embodiment exists as a system embodiment corresponding to the above-mentioned method embodiment. The control system 500 for a multi-port AC / DC hybrid distribution network with a flexible interconnection topology may include:

[0131] The first unit 501 is used to obtain the basic structure of a multi-port AC / DC hybrid distribution network, wherein the basic structure includes an AC subnet, a DC subnet, and an AC / DC interconnection portion, wherein the AC / DC interconnection portion includes a converter, a connector, and a controller for converting between DC and AC, which are collectively used to realize energy exchange between the AC subnet and the DC subnet. The second unit 502 is used to determine the layout of the AC subnet and the DC subnet based on the analysis results of regional power demand, the existing grid structure, and the distribution of renewable energy. The layout includes key nodes that constitute the subnet, and the key nodes include power plants and important load centers. The third unit 503 is used to design and generate a flexible interconnection topology of the multi-port AC / DC hybrid distribution network based on the basic structure and the layout of the AC subnet and the DC subnet. The fourth unit 504 is used to develop a control strategy for the flexible interconnection topology of the multi-port AC / DC hybrid distribution network, including AC / DC conversion process optimization, fault detection and processing, load forecasting and response, and control the flexible interconnection topology of the multi-port AC / DC hybrid distribution network according to the control strategy.

[0132] In some other optional implementations of this embodiment, the converter is produced using technology based on insulated gate bipolar transistors and is combined with corresponding control rules to cope with load fluctuations and network failures; the connector is used to connect the physical interface of different power grid parts, has high conductivity and durability, and the setting method of the connector is determined in combination with the layout; the controller uses a preset predictive control model to predict the energy flow between the AC subgrid and the DC subgrid, and regulates the energy flow between the subgrids according to the energy flow.

[0133] In some other optional implementations of this embodiment, the second unit includes a first subunit for analyzing regional power demand, and the first subunit is specifically configured to:

[0134] Collect historical and forecasted electricity demand data within the target area, including peak loads, load fluctuation patterns, and seasonal variations;

[0135] Determine the short-term impact of special events or abnormal situations on electricity demand; special events or abnormal situations include holidays and extreme weather;

[0136] Determine the long-term impact of population growth, industrial development, and the application of new technologies on electricity demand;

[0137] The electricity demand data, short-term impact and long-term impact are used to predict the future electricity demand data of the target area through statistical models or machine learning algorithms.

[0138] In some other optional implementations of this embodiment, the second unit includes a second subunit for analyzing the existing power grid structure, and the second subunit is specifically configured to:

[0139] Assess the capacity, layout, and technical condition of the existing power grid, including substations, transmission lines, and distribution facilities;

[0140] Identify weaknesses and limitations in the existing grid, including aging infrastructure and areas with insufficient capacity;

[0141] Analyze the performance of existing power grids under high load or fault conditions, including abnormal areas where performance is substandard.

[0142] In some other optional implementations of this embodiment, the second unit includes a third subunit for analyzing renewable energy distribution, and the third subunit is specifically configured to:

[0143] Assess the distribution and potential of renewable energy resources within the target area, including the geographic distribution and intensity of solar and wind energy resources;

[0144] Consider current and planned renewable energy projects, including the location and capacity of photovoltaic power plants and wind farms;

[0145] Analyze the potential and challenges of integrating current renewable energy sources into existing grids, including their variability, predictability, and distributed nature.

[0146] In some other optional implementations of this embodiment, the second unit is specifically configured to:

[0147] Based on the analysis of regional power demand and renewable energy distribution, the layout of the AC and DC subgrids is designed, including:

[0148] Identify the main components of the AC subgrid, including large power plants, major substations, and critical transmission lines;

[0149] Identify the main components of the DC subgrid, including renewable energy generation locations, DC load centers, and DC transmission paths;

[0150] Identify key nodes of the AC and DC subnetworks, including the location information of major power stations, important load centers, and AC / DC conversion stations;

[0151] Based on the guiding principle of ensuring sufficient flexibility and redundancy to cope with future demand changes and potential failures, the connection method between each node of the AC subnet and DC subnet is determined.

[0152] In some other optional implementations of this embodiment, the fourth unit includes a fourth subunit for developing an optimized control strategy for the AC / DC conversion process, the fourth subunit being specifically configured to evaluate the performance of the current AC / DC conversion device and determine optimization objectives and indicators based on the performance; employ control algorithms including fuzzy control, adaptive control, and pulse width modulation technology; integrate a real-time data monitoring system to dynamically adjust parameters during the conversion process; and obtain a target optimized control strategy with effectiveness and stability by testing and verifying each of the developed alternative optimized control strategies.

[0153] The fourth unit includes a fifth subunit for developing a process control strategy for fault detection and handling. The fifth subunit is specifically used to: deploy highly sensitive sensors and monitoring equipment to detect the status of the power grid in real time; develop a fault detection algorithm based on pattern recognition and machine learning; formulate an emergency response plan, including automatically isolating the fault area and redirecting power flow; and verify the effectiveness of the fault handling process by conducting simulation tests to obtain an effective fault detection and handling process.

[0154] The fourth unit includes a sixth subunit for developing processing and control strategies for load forecasting and response. The sixth subunit is specifically used to: collect historical load data, including the impact of time, seasonality, weather and special events; develop a load forecasting model based on statistics and machine learning; integrate the load forecasting model into the power grid control system and update the forecast results in real time; adjust the power grid operation strategy according to the output load forecast, including starting or shutting down certain power generation units and adjusting the converter output.

[0155] This embodiment exists as a system embodiment corresponding to the above-mentioned method embodiment. Compared with the prior art, the control system for the flexible interconnection topology of a multi-port AC / DC hybrid distribution network provided in this embodiment first obtains the basic structure of the multi-port AC / DC hybrid distribution network, then determines the layout of the AC subnet and the DC subnet based on the analysis results of regional power demand, existing grid structure, and renewable energy distribution, then designs and generates the flexible interconnection topology of the multi-port AC / DC hybrid distribution network based on the basic structure and the layout of the AC subnet and the DC subnet, and finally develops a control strategy for the flexible interconnection topology of the multi-port AC / DC hybrid distribution network, including AC / DC conversion process optimization, fault detection and processing, load forecasting and response, and controls the flexible interconnection topology of the multi-port AC / DC hybrid distribution network according to the control strategy, thereby achieving good and effective control of the flexible interconnection topology of the multi-port AC / DC hybrid distribution network.

[0156] Based on the above embodiments, the present invention further provides an electronic device, which may include a memory and a processor. The memory stores a computer program, and the processor, when invoking the computer program in the memory, can implement the steps provided in the above embodiments. Of course, the electronic device may also include various necessary network interfaces, a power supply, and other components.

[0157] The present invention also provides a computer-readable storage medium having a computer program stored thereon. When executed by an execution terminal or processor, the computer program can implement the steps provided in the above embodiments. The storage medium may include: a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, among other media capable of storing program code.

[0158] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0159] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0160] The principles and implementation methods of the present invention are described herein using specific examples. The description of the above examples is only intended to help understand the method and core concept of the present invention. For those skilled in the art, various improvements and modifications can be made to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0161] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. A control method for a flexible interconnection topology of a multi-port AC / DC hybrid distribution network, characterized in that: include: Obtaining a basic structure of a multi-port AC / DC hybrid distribution network; wherein the basic structure includes: an AC subnet, a DC subnet, and an AC / DC interconnection portion; the AC / DC interconnection portion includes: a converter for converting between DC and AC, a connector, and a controller, which are collectively used to implement energy exchange between the AC subnet and the DC subnet; Determining the layout of the AC subnet and the DC subnet based on analysis of regional power demand, existing grid structure, and renewable energy distribution; wherein the layout includes key nodes constituting the subnets, the key nodes including power plants and important load centers; Based on the basic structure and the layout of the AC subnet and the DC subnet, a flexible interconnection topology of a multi-port AC / DC hybrid distribution network is designed and generated; A control strategy including AC / DC conversion process optimization, fault detection and processing, load forecasting and response is developed for the multi-port AC / DC hybrid distribution network flexible interconnection topology, and the multi-port AC / DC hybrid distribution network flexible interconnection topology is controlled according to the control strategy.

2. The control method for a multi-port AC / DC hybrid distribution network flexible interconnection topology according to claim 1, characterized in that: The converter is produced using technology based on insulated gate bipolar transistors and is equipped with corresponding control rules to cope with load fluctuations and network failures; the connector is used to connect the physical interfaces of different power grid parts, and the setting method of the connector is determined in combination with the layout; the controller uses a preset predictive control model to predict the energy flow between the AC subnet and the DC subnet, and regulates the energy flow between the subnets based on the energy flow.

3. The control method for the flexible interconnection topology of a multi-port AC / DC hybrid distribution network according to claim 2, characterized in that: Analyze regional electricity demand, including: Collect historical and forecasted electricity demand data within the target area, including peak loads, load fluctuation patterns, and seasonal variations; Determine the short-term impact of special events or abnormal situations on electricity demand; wherein, special events or abnormal situations include holidays and extreme weather; Determine the long-term impact of population growth, industrial development, and the application of new technologies on electricity demand; The power demand data, the short-term impact and the long-term impact are used to predict future power demand data of the target area through a statistical model or a machine learning algorithm.

4. The control method for a multi-port AC / DC hybrid distribution network flexible interconnection topology according to claim 3, characterized in that: Analyze the existing power grid structure, including: Assess the capacity, layout, and technical condition of the existing power grid, including substations, transmission lines, and distribution facilities; Identify weaknesses and limitations in the existing grid, including aging infrastructure and areas with insufficient capacity; Analyze the performance of existing power grids under high load or fault conditions, including abnormal areas where performance is substandard.

5. The control method for the flexible interconnection topology of a multi-port AC / DC hybrid distribution network according to claim 4, characterized in that: Analyze the distribution of renewable energy, including: Assess the distribution and potential of renewable energy resources within the target area, including the geographic distribution and intensity of solar and wind energy resources; Consider current and planned renewable energy projects, including the location and capacity of photovoltaic power plants and wind farms; Analyze the potential and challenges of integrating current renewable energy sources into existing grids, including their variability, predictability, and distributed nature.

6. The control method for the flexible interconnection topology of a multi-port AC / DC hybrid distribution network according to claim 5, characterized in that: The determining of the layout of the AC subgrid and the DC subgrid based on the analysis results of the regional power demand, the existing power grid structure and the distribution of renewable energy sources includes: Identify the main components of the AC subgrid, including large power plants, major substations, and key transmission lines; determining the main components of the DC subgrid, including renewable energy generation locations, DC load centers, and DC transmission paths; Determine key nodes of the AC subnet and the DC subnet, including location information of major power stations, important load centers, and AC / DC conversion stations; Based on the guiding principle of ensuring sufficient flexibility and redundancy to cope with future demand changes and potential failures, the connection mode between the nodes of the AC subnet and the DC subnet is determined.

7. The control method for a multi-port AC / DC hybrid distribution network flexible interconnection topology according to claim 6, characterized in that: Developing an optimized control strategy for the AC / DC conversion process, including: evaluating the performance of current AC / DC conversion equipment and determining optimization goals and indicators based on the performance; employing control algorithms including fuzzy control, adaptive control, and pulse width modulation techniques; integrating a real-time data monitoring system to dynamically adjust parameters during the conversion process; and testing and verifying the resulting candidate optimized control strategies to obtain an effective and stable target optimized control strategy. Developing a control strategy for fault detection and handling, including: deploying highly sensitive sensors and monitoring equipment to detect grid status in real time; developing a fault detection algorithm based on pattern recognition and machine learning; formulating an emergency response plan, including automatically isolating the fault area and redirecting power flow; and verifying the effectiveness of the fault handling process through simulation testing to obtain an effective fault detection and handling process. Developing a processing and control strategy for load forecasting and response, including: collecting historical load data, including the impact of time, seasonality, weather, and special events; developing a load forecasting model based on statistics and machine learning; integrating the load forecasting model into the power grid control system and updating the forecast results in real time; adjusting the power grid operation strategy based on the output load forecast, including starting or shutting down certain power generation units and adjusting the converter output.

8. A control system for a multi-port AC / DC hybrid distribution network with flexible interconnection topology, characterized in that: include: The first unit is configured to obtain a basic structure of a multi-port AC / DC hybrid distribution network; wherein the basic structure includes an AC subnet, a DC subnet, and an AC / DC interconnection portion, wherein the AC / DC interconnection portion includes a converter, a connector, and a controller for converting between DC and AC, which are used together to implement energy exchange between the AC subnet and the DC subnet; The second unit is configured to determine the layout of the AC subnet and the DC subnet based on the analysis results of regional power demand, existing power grid structure, and renewable energy distribution; wherein the layout includes key nodes constituting the subnets, and the key nodes include power plants and important load centers; The third unit is configured to design and generate a flexible interconnection topology of a multi-port AC / DC hybrid distribution network based on the basic structure and the layout of the AC subnet and the DC subnet; The fourth unit is used to develop a control strategy for the flexible interconnection topology of the multi-port AC / DC hybrid distribution network, including AC / DC conversion process optimization, fault detection and processing, load forecasting and response, and control the flexible interconnection topology of the multi-port AC / DC hybrid distribution network according to the control strategy.

9. An electronic device, characterized in that: include: memory, for computer programs; A processor, configured to implement the steps of the method for controlling a flexible interconnection topology of a multi-port AC / DC hybrid distribution network according to any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A readable storage medium, characterized in that: The readable storage medium stores a computer program, which, after being executed by a processor, can implement the steps of the control method for the flexible interconnection topology of a multi-port AC / DC hybrid distribution network according to any one of claims 1 to 7.

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