Distribution network topology and regulation and control method based on transformer area shared energy storage and interconnection mutual aid

Abstract

The invention provides a power distribution network topology and regulation and control method based on transformer area shared energy storage and interconnection mutual aid. The power distribution network topology and regulation and control method based on transformer area shared energy storage and interconnection mutual aid comprises the following steps that S1, a transformer area shared energy storage system structure is constructed, the sharing mode of the energy storage system effectively avoids excessive investment and resource waste, and the economical efficiency and the operation efficiency of the whole system are improved; s2, constructing a power distribution network interconnection mutual aid topological structure; and S3, monitoring the power transmission state between the transformer areas, the power grid operation condition and the charging and discharging state of the energy storage equipment in real time based on the intelligent scheduling system, and carrying out flexible adjustment according to the current demand. The power distribution network topology and regulation and control method based on transformer area shared energy storage and interconnection mutual aid provided by the invention not only improves the operation efficiency, reliability and flexibility of the power distribution network, but also can effectively cope with challenges brought by new energy access and load fluctuation, and has the advantages of shared use and dynamic regulation and control of energy storage resources by optimizing the power grid structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of distribution network topology and control, and particularly relates to a distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area. Background Art

[0002] With the continuous increase in the proportion of clean energy, the access amount of intermittent energy sources such as photovoltaic and wind power in the distribution network has increased year by year. The traditional distribution network cannot effectively cope with this volatility, resulting in unstable grid operation and difficult-to-guarantee power quality. To solve this problem, many studies have proposed the access of energy storage systems to smooth load fluctuations and cut peaks and fill valleys. However, the energy storage capacity of a single substation area is limited and the energy storage cost is relatively high. Therefore, a new method is needed to improve the utilization efficiency and flexibility of energy storage. Summary of the Invention

[0003] The technical problem solved by the present invention is to provide a distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area, which not only improves the operation efficiency, reliability and flexibility of the distribution network, but also can effectively cope with the challenges brought by the access of new energy and load fluctuations, by optimizing the grid structure, sharing and using energy storage resources, and dynamic control.

[0004] To solve the above technical problems, the distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area provided by the present invention includes the following steps:

[0005] S1. Construct the structure of the shared energy storage system in the substation area. The sharing method of the energy storage system effectively avoids over-investment and resource waste, and improves the economy and operation efficiency of the overall system;

[0006] S2. Construct the interconnection and mutual assistance topology structure of the distribution network;

[0007] S3. Based on the intelligent dispatching system, real-time monitor the power transmission status between substations, the grid operation conditions and the charge and discharge status of the energy storage devices, and flexibly adjust according to the current demand. Through this intelligent dispatching method, the distribution network can avoid power supply shortages during peak load periods and ensure the stable operation of the system during the fluctuations of renewable energy power generation;

[0008] S4. Based on the platform, real-time monitor the voltage, current and power parameters of each substation area of the distribution network, collect the charge and discharge conditions of the energy storage units in each substation area, and predict the future power demand changes through big data analysis;

[0009] S5. When a system fault occurs, the system can adaptively detect and isolate the fault to ensure that the fault will not spread to the entire distribution network. Through the intelligent control system, the fault area can timely switch the power supply or supply power through the energy storage system of the adjacent substation area, so as to ensure the stability and reliability of the entire distribution network;

[0010] S6. Construct an economic optimization model for the operation of the distribution network. Through the application of this model, the operation cost of the distribution network can be effectively reduced and the economic benefit can be improved.

[0011] As a further solution of the present invention, the method for constructing the structure of the shared energy storage system for transformer substations is as follows:

[0012] (1). Uniformly plan and coordinately manage the energy storage devices of multiple transformer substations to construct a highly integrated energy storage network;

[0013] (2). The energy storage unit of each transformer substation is dynamically adjusted according to the power demand, the remaining power of the energy storage device, and the operation conditions of other transformer substations.

[0014] As a further solution of the present invention, the method for constructing the interconnected and mutually supporting topological structure of the distribution network is as follows:

[0015] (1). Different transformer substations are connected through flexible gateways and intelligent switches to realize the power flow between multiple transformer substations. This structure can automatically adjust the power transmission path during the peak load of each transformer substation or when the energy storage device is insufficient to ensure the efficient distribution and stable supply of power;

[0016] (2). Through the intelligent topological design of the distribution network, the rapid dispatching and restoration of power can be realized, and the fault resistance ability of the system can be improved.

[0017] As a further solution of the present invention, the interconnected and mutually supporting topological structure and the intelligent dispatching method can enable the distribution network to quickly adjust when a fault occurs or the load fluctuates, and thus can ensure the continuous supply of power.

[0018] As a further solution of the present invention, the introduction of the shared energy storage system for transformer substations can avoid excessive investment in the energy storage devices of a single transformer substation, improve the utilization efficiency of resources, and at the same time reduce the overall operation cost.

[0019] As a further solution of the present invention, the intelligent dispatching system of the energy storage device can effectively cope with the fluctuations of renewable energy such as wind energy and solar energy to ensure the stability of power supply.

[0020] As a further solution of the present invention, the cooperation of the big data analysis and the dynamic control mode of intelligent dispatching can enable the distribution network to make optimal decisions according to real-time data, thereby improving the intelligence and automation level of the power grid.

[0021] As a further solution of the present invention, the topological structure is optimized and combined with the power flow characteristics between the power distribution areas to rationally configure the energy storage units in the power distribution areas. The load data, energy storage status, and power generation status information of each power distribution area are collected in real time through the monitoring system of the smart grid, and the topological structure of the distribution network is adjusted so that the power flow can be efficiently transmitted between the power distribution areas. By realizing the interconnection and mutual assistance between the power distribution areas, in the power distribution areas with excessive power demand or low energy storage, the energy storage resources of other power distribution areas in the network are used for support, thereby ensuring the stability of the distribution network.

[0022] As a further solution of the present invention, the energy storage device can adjust the energy storage load between different power distribution areas by optimizing the charge and discharge strategy. This mechanism can schedule the charge and discharge of the energy storage device in real time, ensure the power supply demand of the power distribution areas with large load and less energy storage, and ensure the stable operation of the power grid. At the same time, through intelligent scheduling and real-time monitoring, the system can flexibly adjust the use of energy storage resources, which not only improves the power supply capacity of the power grid but also reduces the impact of power fluctuations.

[0023] As a further solution of the present invention, the dynamic regulation and control of the distribution network are carried out in the power grid. The power demands and energy storage states of different power distribution areas are changing. By analyzing the load, power quality, and energy storage state of each power distribution area in the power grid in real time, the operating parameters of the power grid are dynamically adjusted. This method can effectively adjust the allocation of energy storage resources and power flow automatically according to the changes in the real-time power market, and optimize the operating efficiency of the power grid.

[0024] Compared with the related technologies, the distribution network topology and regulation method based on shared energy storage and interconnection and mutual assistance between power distribution areas provided by the present invention have the following beneficial effects:

[0025] 1. The distribution network topology and regulation method based on shared energy storage and interconnection and mutual assistance between power distribution areas of the present invention not only improve the operating efficiency, reliability, and flexibility of the distribution network but also can effectively cope with the challenges brought by the access of new energy and load fluctuations by optimizing the power grid structure, sharing the use of energy storage resources, and dynamic regulation and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic flowchart of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] Please refer to Figure 1 , wherein, Figure 1 It is a schematic flowchart of the present invention. The distribution network topology and regulation method based on shared energy storage and interconnection and mutual assistance between power distribution areas include the following steps:

[0029] S1. Construct the structure of the substation area shared energy storage system. The sharing method of the energy storage system effectively avoids over-investment and resource waste, and improves the economy and operation efficiency of the overall system;

[0030] S2. Construct the interconnected and mutually beneficial topology structure of the distribution network;

[0031] S3. Based on the intelligent dispatching system, real-time monitor the power transmission status between substation areas, the operation of the power grid, and the charge and discharge status of energy storage devices, and make flexible adjustments according to the current demand. Through this intelligent dispatching method, the distribution network can avoid power supply shortages during peak load periods and ensure the stable operation of the system during the fluctuations of renewable energy generation;

[0032] S4. Based on the platform, real-time monitor the voltage, current, and power parameters of each substation area of the distribution network, collect the charge and discharge conditions of the energy storage units in each substation area, and predict the future power demand changes through big data analysis;

[0033] S5. When a system fault occurs, the system can adaptively detect and isolate the fault to ensure that the fault does not spread to the entire distribution network. Through the intelligent control system, the fault area can timely switch the power supply or supply power through the energy storage system of adjacent substation areas, thus ensuring the stability and reliability of the entire distribution network;

[0034] S6. Construct an economic optimization model for the operation of the distribution network. Through the application of this model, the operation cost of the distribution network can be effectively reduced and the economic benefits can be improved.

[0035] The method for constructing the structure of the substation area shared energy storage system is as follows:

[0036] (1). Unifiedly plan and coordinately manage the energy storage devices in multiple substation areas to construct a highly integrated energy storage network;

[0037] (2). The energy storage unit in each substation area makes dynamic adjustments according to the power demand, the remaining power of the energy storage device, and the operation conditions of other substation areas.

[0038] The method for constructing the interconnected and mutually beneficial topology structure of the distribution network is as follows:

[0039] (1). Connect different substation areas through flexible gateways and intelligent switches to realize the power flow between multiple substation areas. This structure can automatically adjust the power transmission path when the load in each substation area reaches the peak or the energy storage device is insufficient, ensuring the efficient distribution and stable supply of power;

[0040] (2). Through the intelligent topology design of the distribution network, the rapid dispatching and restoration of power can be realized, and the fault resistance ability of the system can be improved.

[0041] The interconnected topology structure and intelligent scheduling method can enable the distribution network to quickly adjust in case of faults or load fluctuations, thereby ensuring the continuous supply of electricity.

[0042] The introduction of the shared energy storage system for substations can avoid excessive investment in energy storage equipment for individual substations, improve the utilization efficiency of resources, and reduce the overall operating costs at the same time.

[0043] The intelligent scheduling system of the energy storage equipment can effectively cope with the fluctuations of wind energy and solar renewable energy, ensuring the stability of power supply.

[0044] The cooperation of the dynamic control method of big data analysis and intelligent scheduling enables the distribution network to make optimal decisions based on real-time data, thereby enhancing the intelligence and automation level of the power grid.

[0045] The topology structure is optimized and combined with the power flow characteristics between substations to rationally allocate energy storage units for substations. Through the monitoring system of the smart grid, the load data, energy storage status, and power generation status information of each substation are collected in real time, and the topology structure of the distribution network is adjusted so that the power flow can be efficiently transmitted between each substation. By realizing the interconnection and mutual assistance between substations, in the substations with excessive power demand or low energy storage, the energy storage resources of other substations in the network are used for support, thereby ensuring the stability of the distribution network.

[0046] By optimizing the charge and discharge strategy, the energy storage equipment can adjust the energy storage load between different substations. This mechanism can schedule the charge and discharge of the energy storage equipment in real time, ensure the power supply demand of the substations with large loads and less energy storage, and ensure the stable operation of the power grid. At the same time, through intelligent scheduling and real-time monitoring, the system can flexibly adjust the use of energy storage resources, which not only improves the power supply capacity of the power grid but also reduces the impact of power fluctuations.

[0047] The dynamic regulation and control of the distribution network are carried out in the power grid. The power demands and energy storage states of different substations are changing. By analyzing the load, power quality, and energy storage state of each substation in the power grid in real time, the operating parameters of the power grid are dynamically adjusted. This method can effectively adjust the allocation of energy storage resources and power flow automatically according to the changes in the real-time power market, and optimize the operating efficiency of the power grid.

[0048] The regulation and control method based on shared energy storage and interconnection and mutual assistance for substations of the present invention can effectively improve the operating efficiency of the distribution network, optimize the power flow, reduce the power transmission loss. While sharing the energy storage resources among multiple substations, it can reduce the pressure of excessive power demand during peak hours and improve the load capacity of the power grid;

[0049] Through the interconnection and mutual assistance between substations, the reliability of the power grid has been significantly improved. Substations can support each other. When a fault occurs in a certain substation, other substations can quickly provide energy storage support to avoid large-scale power outages. At the same time, the system can adjust the operating parameters of the power grid in real time to ensure the safe and stable operation of the power grid;

[0050] Through the shared energy storage mechanism of the present invention, the energy storage resources are utilized more efficiently. The sharing of energy storage resources between substations not only improves the utilization efficiency of energy storage devices but also reduces the overall energy storage cost of the system;

[0051] The regulation method of the present invention can effectively address the issue of new energy volatility. Through the scheduling of substation energy storage devices, it can balance the instability of new energy power generation such as photovoltaic and wind energy, reduce the impact on the power grid load, and promote the large-scale access of clean energy.

[0052] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area, characterized in that, Including: The following steps: S1. Construct the structure of the shared energy storage system for the substation area. The sharing method of the energy storage system effectively avoids over-investment and resource waste, and improves the economy and operation efficiency of the overall system; S2. Construct the interconnected and mutually complementary topological structure of the distribution network; S3. Based on the intelligent dispatching system, monitor the power transmission status between substations, the operation of the power grid, and the charge and discharge status of the energy storage devices in real time, and make flexible adjustments according to the current demand. Through this intelligent dispatching method, the distribution network can avoid power supply shortages during peak load periods and ensure the stable operation of the system during the fluctuations of renewable energy generation; S4. Based on the platform, monitor the voltage, current, and power parameters of each substation area of the distribution network in real time, collect the charge and discharge conditions of the energy storage units in each substation area, and predict the future power demand changes through big data analysis; S5. When a system fault occurs, the system can adaptively detect and isolate the fault to ensure that the fault does not spread to the entire distribution network. Through the intelligent control system, the fault area can switch the power supply in time or supply power through the energy storage system of the adjacent substation area, thus ensuring the stability and reliability of the entire distribution network; S6. Construct an economic optimization model for the operation of the distribution network. Through the application of this model, the operation cost of the distribution network can be effectively reduced and the economic benefit can be improved.

2. The topology and control method of the distribution network based on shared energy storage and interconnection and mutual assistance in the substation area according to claim 1, characterized in that: The method for constructing the structure of the shared energy storage system for the substation area is as follows: (1). Uniformly plan and coordinately manage the energy storage devices of multiple substation areas to construct a highly integrated energy storage network; (2). The energy storage unit of each substation area makes dynamic adjustments according to the power demand, the remaining power of the energy storage device, and the operation conditions of other substation areas.

3. The distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area according to claim 1, wherein: The method for constructing the interconnected and mutually complementary topological structure of the distribution network is as follows: (1). Connect different substation areas through flexible gateways and intelligent switches to realize the power flow between multiple substation areas. This structure can automatically adjust the power transmission path when the load of each substation area reaches the peak or the energy storage device is insufficient, ensuring the efficient distribution and stable supply of power; (2). Through the intelligent topological design of the distribution network, the rapid dispatching and restoration of power can be realized, and the fault resistance ability of the system can be improved.

4. The distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area according to claim 1, wherein: The interconnected and mutually complementary topological structure and the intelligent dispatching method can enable the distribution network to quickly adjust when a fault or load fluctuation occurs, and thus can ensure the continuous supply of power.

5. The distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area according to claim 1, characterized in that: The introduction of the shared energy storage system for the substation area can avoid over-investment in the energy storage devices of a single substation area, improve the utilization efficiency of resources, and at the same time reduce the overall operation cost.

6. The distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area according to claim 1, characterized in that: The intelligent dispatching system of the energy storage device can effectively cope with the fluctuations of wind energy and solar energy renewable energy and ensure the stability of power supply.

7. The distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area according to claim 1, characterized in that: The cooperation of the big data analysis and the dynamic control method of intelligent dispatching can enable the distribution network to make optimal decisions based on real-time data, thereby improving the intelligence and automation level of the power grid.

8. The method for the topology and control of a distribution network based on shared energy storage and interconnection and mutual assistance in a substation area according to claim 1, wherein: Optimize the topology structure and combine it with the power flow characteristics between substations to rationally allocate energy storage units in substations. Real-time collect the load data, energy storage status, and power generation status information of each substation through the monitoring system of the smart grid, and adjust the topology structure of the distribution network so that the power flow can be efficiently transmitted between substations. By realizing the interconnection and mutual assistance between substations, in the substations with excessive power demand or low energy storage, support is provided through the energy storage resources of other substations in the network, thereby ensuring the stability of the distribution network.

9. The distribution network topology and control method based on shared energy storage and interconnection and mutual assistance in the substation area according to claim 1, characterized in that: By optimizing the charge and discharge strategy, the energy storage device can adjust the energy storage load between different substations. This mechanism can schedule the charge and discharge of the energy storage device in real time, ensure the power supply demand of the substations with large loads and less energy storage, and ensure the stable operation of the power grid. At the same time, through intelligent scheduling and real-time monitoring, the system can flexibly adjust the use of energy storage resources, which not only improves the power supply capacity of the power grid but also reduces the impact of power fluctuations.

10. The method for topology and control of a distribution network based on shared energy storage and interconnection and mutual assistance in a substation area according to claim 1, wherein: The dynamic regulation and control of the distribution network are carried out in the power grid. The power demands and energy storage statuses of different substations are changing. By analyzing the load, power quality, and energy storage status of each substation in the power grid in real time, the operating parameters of the power grid are dynamically adjusted. This method can effectively adjust the allocation of energy storage resources and power flow automatically according to the changes in the real-time power market, and optimize the operating efficiency of the power grid.

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