A method and terminal for optimizing power network flow including wind power

Abstract

The present invention discloses a power network flow optimization method and terminal including wind power, which divides the power network into a plurality of regional subnetworks, and interconnects the plurality of regional subnetworks, wherein at least one of the regional subnetworks is provided with a wind farm; determines the size of the wind power generated by the wind farm, and determines the flow control mode for the regional subnetwork where the wind farm is located according to the size of the wind power; performs flow control according to the flow control mode, the cross-sectional power transmission capacity of each interconnection channel corresponding to the regional subnetwork where the wind farm is located, the absorption capacity of other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, and the types of power grid equipment contained therein; realizes the optimal utilization of wind power, and can also perform appropriate energy supplementation for the regional subnetwork where the wind farm is located, realizes uniform flow distribution, and ensures the safe and stable operation of the power grid while promoting the balance of power supply and demand.

Description

Technical Field

[0001] The present invention relates to the field of power network flow control, and in particular to a power network flow optimization method and terminal including wind power. Background Art

[0002] With the promotion of green energy, more and more green energy, such as wind power and solar energy, are widely used in power grids, and are also being used in power grids at an increasing rate. However, these new energy sources, such as wind power, usually have the characteristics of strong randomness, volatility and intermittency. When a large proportion of new energy sources replace traditional thermal power units and are connected to the power grid on a large scale, due to their above characteristics, the randomness of the spatiotemporal distribution of power grid trends increases, and the difficulty of spatiotemporal control and balance of power and electricity in the power system is further increased.

[0003] The distribution of transmission line power flow is uneven, and the transmission section bottleneck and idle transmission capacity of the power grid coexist. This is not only not conducive to the overall power transmission and supply capacity of the power grid, but also not conducive to reducing the level of transmission line losses; it will also lead to the transmission capacity of the concentrated transmission channel of new energy power generation being limited, and restrict the level of new energy power generation consumption. In order to cope with the increase in demand for new energy consumption, the improvement of power grid transmission capacity and the demand for economic operation, the power grid power flow urgently needs to achieve optimized distribution of power flow through active control means to promote the balance of power supply and demand.

[0004] In the current existing technology, for regional systems with large-scale grid connection of new energy, a flow regulation device is usually used to realize the transmission of new energy to solve the problem of power supply and demand balance. However, relying solely on the flow regulation method will often lead to an increase in the absorption pressure of the receiving power grid, which is not conducive to the safe and stable operation of the power grid. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method and terminal for optimizing power network flow including wind power, so as to ensure the safe and stable operation of the power grid while promoting the balance of power supply and demand.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0007] A method for optimizing power network flow including wind power comprises the steps of:

[0008] S1. Divide the power network into multiple regional sub-networks, and interconnect the multiple regional sub-networks, at least one of the regional sub-networks being provided with a wind farm;

[0009] S2. Determine the amount of wind power generated by the wind farm, and determine a power flow control method for the regional subnetwork where the wind farm is located according to the amount of wind power;

[0010] S3. Perform power flow control according to the power flow control method, the cross-sectional transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein.

[0011] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0012] A power network flow optimization terminal including wind power includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, each step of the above-mentioned power network flow optimization method including wind power is implemented.

[0013] The beneficial effects of the present invention are as follows: the power network is divided into regional sub-networks, and for the regional sub-networks where the wind farm is set, the corresponding flow control mode is determined according to the size of the wind power generated by the wind farm, and then the flow control is performed according to the flow control mode, the cross-sectional power transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of grid equipment contained therein. The division of the power network facilitates the flow inter-adjustment between different regional sub-networks, and when the flow control is performed according to the size of the wind power generated by the wind power, the wind power is not simply sent out as in the prior art, but the flow control mode is first determined, and in the flow control, the cross-sectional power transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of grid equipment contained therein are all taken into consideration, thereby achieving the optimal utilization of wind power, and at the same time, it is also possible to perform appropriate energy supplementation on the regional sub-network where the wind farm is located, thereby achieving uniform flow distribution, and ensuring the safe and stable operation of the power grid while promoting the balance of power supply and demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A flowchart of the steps of a method for optimizing power network flow including wind power according to an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of a power network flow optimization terminal including wind power according to an embodiment of the present invention;

[0016] Figure 3 A layout diagram of a power network including wind power according to an embodiment of the present invention;

[0017] Explanation of reference numbers: 1. Area A; 2. Area B; 3. Area C; 4. Line I; 5. Line II; 6. Line III. DETAILED DESCRIPTION

[0018] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0019] Please refer to Figure 1 , a method for optimizing power network flow including wind power, comprising the steps of:

[0020] S1. Divide the power network into multiple regional sub-networks, and interconnect the multiple regional sub-networks, at least one of the regional sub-networks being provided with a wind farm;

[0021] S2. Determine the amount of wind power generated by the wind farm, and determine a power flow control method for the regional subnetwork where the wind farm is located according to the amount of wind power;

[0022] S3. Perform power flow control according to the power flow control method, the cross-sectional transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein.

[0023] From the above description, it can be seen that the beneficial effects of the present invention are: the power network is divided into regional sub-networks, and for the regional sub-networks where wind farms are set up, the corresponding flow control mode is determined according to the size of the wind power generated by the wind farm, and then the flow control is performed according to the flow control mode, the cross-sectional transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein. The division of the power network facilitates the flow inter-adjustment between different regional sub-networks, and When the flow control is performed according to the size of the wind power, the wind power is not simply transmitted as in the existing method, but the flow control method is first determined. In the flow control, the cross-sectional transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein are all taken into consideration, thereby achieving the optimal utilization of wind power. At the same time, appropriate energy can be supplemented for the regional sub-network where the wind farm is located, achieving uniform flow distribution, and ensuring the safe and stable operation of the power grid while promoting the balance of power supply and demand.

[0024] Furthermore, the power flow control method for the regional sub-network where the wind farm is located is determined according to the size of the wind power, including:

[0025] Determine whether the magnitude of the wind power is greater than a first preset value, and if so, determine that the power flow control mode for the regional sub-network where the wind farm is located is a power flow external transmission mode;

[0026] Determine whether the magnitude of the wind power is less than a second preset value, and if so, determine that the power flow control mode for the regional sub-network where the wind farm is located is a power flow absorption mode;

[0027] The step S3 comprises:

[0028] S31. If the power flow control mode is a power flow transmission mode, power flow control is performed according to the cross-sectional power transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein;

[0029] S32. If the power flow control method is a power flow absorption method, power flow control is performed according to the cross-sectional power transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located and the types of power grid equipment included in other regional sub-networks interconnected with the regional sub-network where the wind farm is located.

[0030] From the above description, it can be seen that when wind power is generated in large quantities, the transmission section flow of the regional sub-network where the wind power is located should be increased as much as possible to achieve the maximum power absorption of wind power. When the flow is transmitted, the section transmission capacity of the interconnected channel, the absorption capacity of other regional sub-networks and the types of grid equipment contained in them are comprehensively considered to take into account the balanced distribution of the flow and the stable operation of the grid; when the wind power output is insufficient, the regional sub-network where the wind farm is located absorbs the flow from other regional sub-networks interconnected with it to meet the load demand. In the process of absorbing the flow, the section transmission capacity of each interconnected channel and the types of grid equipment contained in other regional sub-networks are comprehensively considered to take into account the stable operation of the grid and the reasonable and efficient distribution of the flow.

[0031] Further, the S31 includes:

[0032] Determine the surplus of the wind power energy, and judge whether the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located is limited;

[0033] If not limited, the surplus wind power is transmitted to other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, based on the cross-sectional transmission capacity of each interconnection channel corresponding to the regional subnetwork where the wind farm is located, while ensuring that each interconnection channel is not overloaded;

[0034] If it is limited, the regional subnetwork containing the energy storage device is determined according to the type of grid equipment contained in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, and the energy storage device is started so that the energy storage device works in a charging state to assist in absorbing the remaining wind power due to the limitation.

[0035] From the above description, it can be seen that when there is a surplus of wind power, it is first determined whether the absorption capacity of other interconnected regional sub-networks is limited. If it is not limited, the surplus wind power is transmitted under the premise that each interconnected channel is not overloaded. If it is limited, in addition to transmitting wind power within the absorption range of other interconnected regional sub-networks, the energy storage equipment in other interconnected regional sub-networks is started for charging to assist absorption, thereby achieving maximum absorption of wind power and avoiding energy waste.

[0036] Further, the S32 includes:

[0037] Determine, based on the wind power, the amount of load supplementation required by the regional subnetwork where the wind farm is located due to insufficient wind power;

[0038] Determine a regional subnetwork including a power source according to the types of power grid equipment included in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located;

[0039] The regional subnetwork including the power source is controlled to supply power to the regional subnetwork where the wind farm is located based on the load supplement amount according to the cross-sectional power transmission capacity of each interconnection channel corresponding to the regional subnetwork where the wind farm is located, while ensuring that the corresponding interconnection channel is not overloaded.

[0040] From the above description, it can be seen that when wind power output is insufficient, electric energy can be provided by a regional subnetwork including power sources in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located to meet the load demand of the regional subnetwork where the wind farm is located.

[0041] Furthermore, the determination of the regional sub-network including the power source in S32 is replaced by the determination of the regional sub-network including the energy storage device.

[0042] From the above description, it can be seen that when wind power output is insufficient, electric energy can be provided by a regional subnetwork containing energy storage devices in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located to meet the load demand of the regional subnetwork where the wind farm is located.

[0043] Further, setting the priority of the energy storage device to be greater than the priority of the power source;

[0044] When the electric energy stored in the energy storage device in the regional sub-network interconnected with the regional sub-network where the wind farm is located cannot meet the load supplement amount, the regional sub-network including the power source will provide supplementary power supply.

[0045] From the above description, it can be seen that when the wind power output is insufficient, the regional subnetwork containing energy storage devices in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located is preferentially used to provide electricity to meet the load demand of the regional subnetwork where the wind farm is located. When the energy storage device cannot meet the load demand, the power supply is started to supplement the power supply, which can realize the distribution of power flow more reasonably.

[0046] Furthermore, in the process of transmitting the surplus wind power to other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, if the power flow of one of the interconnected regional subnetworks is greater than a third preset value, the line impedance of the interconnection channel corresponding to the other interconnected regional subnetworks is reduced to perform power flow regulation.

[0047] From the above description, it can be seen that in the process of transmitting power flow, if the power flow of one of the transmission channels is heavier, the power flow of other transmission channels can be increased by adjusting the line impedance of other transmission channels, so as to increase the cross-sectional power flow of transmission as much as possible through dynamic adjustment of the power flow of different transmission channels, and realize the maximum power consumption of wind power.

[0048] Please refer to Figure 2 , a power network flow optimization terminal including wind power, including a memory, a processor and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, each step in the above-mentioned power network flow optimization method including wind power is implemented.

[0049] The above-mentioned power network flow optimization method and terminal including wind power of the present invention can be applied to the flow control including wind power in the power network, and the following is explained through specific implementation methods:

[0050] Please refer to Figure 1 , a method for optimizing power network flow including wind power, comprising the steps of:

[0051] S1. Divide the power network into multiple regional sub-networks, and interconnect the multiple regional sub-networks, at least one of the regional sub-networks being provided with a wind farm;

[0052] like Figure 3 As shown, in this embodiment, three regional subnetworks are included, namely, region A1, region B2 and region C3. Region A1 and region B2 are interconnected through line I4, region A1 and region C3 are interconnected through line II5, and region B2 and region C3 are interconnected through line III6. A wind farm is set in region A1 to provide wind power for region A for power supply;

[0053] S2. Determine the amount of wind power generated by the wind farm, and determine a power flow control method for the regional subnetwork where the wind farm is located according to the amount of wind power;

[0054] Specifically, it is determined whether the magnitude of the wind power is greater than a first preset value. If so, that is, when the wind power is generated in large quantities and there is surplus wind power, it is determined that the power flow control mode for the regional sub-network where the wind farm is located is a power flow transmission mode;

[0055] Determine whether the magnitude of the wind power is less than a second preset value, and if so, that is, when the wind power output is insufficient, determine that the flow control mode for the regional sub-network where the wind farm is located is a flow absorption mode;

[0056] S3, performing power flow control according to the power flow control mode, the cross-sectional power transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein;

[0057] Specifically:

[0058] S31. If the power flow control mode is a power flow transmission mode, power flow control is performed according to the cross-sectional power transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein;

[0059] Wherein, in the process of transmitting the surplus wind power to other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, if the power flow of one of the interconnected regional subnetworks is greater than a third preset value, then reducing the line impedance of the interconnection channel corresponding to the other interconnected regional subnetworks to perform power flow regulation;

[0060] S32. If the power flow control mode is a power flow absorption mode, power flow control is performed according to the cross-sectional power transmission capacity of each interconnection channel corresponding to the regional sub-network where the wind farm is located and the types of power grid equipment included in other regional sub-networks interconnected with the regional sub-network where the wind farm is located;

[0061] In order to realize the power flow inter-modulation between the above-mentioned sub-networks in different regions, flexible control devices can be set between the sub-networks in different regions, such as Figure 3As shown, flexible control devices can be respectively arranged on line Ⅰ4, line Ⅱ5 and line Ⅲ6. The flexible control devices can adopt FACTS equipment (Flexible AC Transmission Systems) based on voltage source converter, such as UPFC (unified power flow controller) or SSSC (static synchronous series compensator) or DPFC (Distributed Power Flow Controller). The flexible control devices can realize power flow intermodulation between sub-networks in different regions. When controlling, centralized control can be adopted, that is, unified dispatching control; local control can also be adopted, that is, pre-setting the state for local control.

[0062] Embodiment 2

[0063] This embodiment further defines how to implement power flow intermodulation between sub-networks in different regions according to the size of wind power. Specifically:

[0064] The S31 includes:

[0065] Determine the surplus of the wind power energy, and judge whether the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located is limited;

[0066] If there is no restriction, the surplus wind power energy is transmitted to other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, based on the cross-sectional transmission capacity of each interconnection channel corresponding to the regional subnetwork where the wind farm is located, on the premise of ensuring that each interconnection channel is not overloaded. When transmitting the wind power energy, the power flow transfer direction can be allocated based on the load level of each regional subnetwork, the impedance parameters of the interconnection line, etc.;

[0067] If it is limited, then determine the regional subnetwork containing the energy storage device according to the type of power grid equipment contained in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, start the energy storage device, and make the energy storage device work in a charging state to assist in absorbing the remaining wind power due to the limitation;

[0068] The S32 includes:

[0069] Determine, based on the wind power, the amount of load supplementation required by the regional subnetwork where the wind farm is located due to insufficient wind power;

[0070] Determine a regional subnetwork including a power source according to the types of power grid equipment included in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located;

[0071] The regional subnetwork including the power source is controlled to supply power to the regional subnetwork where the wind farm is located based on the load supplement amount according to the cross-sectional power transmission capacity of each interconnection channel corresponding to the regional subnetwork where the wind farm is located, while ensuring that the corresponding interconnection channel is not overloaded.

[0072] In another optional implementation, the determination of the regional subnetwork including the power source in S32 is replaced by determination of the regional subnetwork including the energy storage device;

[0073] In another optional implementation, the priority of the energy storage device is set to be greater than the priority of the power source;

[0074] When the electric energy stored in the energy storage device in the regional sub-network interconnected with the regional sub-network where the wind farm is located cannot meet the load supplement amount, the regional sub-network including the power source will provide supplementary power supply;

[0075] by Figure 3 The power grid architecture diagram including wind power is shown as an example to illustrate how to achieve power flow interoperation between sub-grids in different regions:

[0076] Figure 3 In the figure, area A1 includes but is not limited to wind farms and loads, area B2 includes but is not limited to loads, power sources and energy storage, and area C3 includes but is not limited to power sources and loads;

[0077] When area A1 has surplus electricity or has a demand for external transmission, a centralized control instruction is generated by comprehensively considering the transmission capacity of line sections I4 and II5 and the power consumption capacity of areas B2 and C3, and the flexible control devices on transmission channels I and II are controlled to perform power flow control to optimize the surplus electricity or external power of area A. If the power flow of a certain transmission channel (such as line II5) is heavy, the line impedance can be appropriately reduced by adjusting the flexible control device of another transmission channel (such as line I4) to adjust the power flow, increase the power flow of the external transmission section of area A1 as much as possible, and realize the maximum power consumption of wind power;

[0078] Under the premise that the absorption capacity of regions B2 and C3 is not limited, the centralized control command must ensure that the channels of lines I4 and II5 are not overloaded; under the premise that the absorption capacity of regions B2 and C3 is limited, the centralized control command can start the energy storage system in region B under the constraint of ensuring that the channels of lines I4 and II5 are not overloaded, so that the energy storage system works in a charging state for coordinated auxiliary absorption;

[0079] When the wind power in area A1 is insufficient to meet the load demand of the zone, interconnected areas B2 and C3 simultaneously supply power to area A1 where the wind power is located. By adjusting the flexible control device of the interconnected transmission channel, area B2 containing energy storage preferentially discharges the energy storage system to supply energy to the load of area A1 where the wind power is located.

[0080] In this embodiment, in a multi-regional power grid including wind power and energy storage and its interconnected transmission channels, and a power system in which a flexible control device is installed in the transmission channel, a centralized or local control method is adopted. When wind power is generated in large quantities, the flexible control device and the energy storage system are adjusted to charge, and the flow of the wind power transmission section is adjusted to achieve the maximum absorption of wind power. When the wind power output is insufficient, the load demand of the wind power area is met by adjusting the discharge of the flexible control device and the energy storage system, and the coordination and cooperation between the flexible control device and the energy storage system are fully utilized to achieve the flow optimization of the multi-regional power system including wind power and energy storage, improve the new energy absorption capacity, give full play to the overall supply and transmission capacity of the power grid, and ensure the safe and stable operation of the power grid.

[0081] Embodiment 3

[0082] Please refer to Figure 2 , a power network flow optimization terminal including wind power, including a memory, a processor and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, each step of a power network flow optimization method including wind power described in Embodiment 1 or Embodiment 2 is implemented.

[0083] In summary, the present invention provides a method and terminal for optimizing the power network flow including wind power. The power network is divided into regional sub-networks. Different regional sub-networks are interconnected through transmission channels equipped with flexible control devices. For regional sub-networks with wind farms, the corresponding power flow control method is determined according to the size of the wind power generated by the wind farms. A centralized or local control method is adopted. When wind power is generated, the flexible control device is adjusted to charge the energy storage system. The power flow of the wind power transmission section is adjusted under the premise of meeting the transmission capacity limit of the interconnection channel section, so as to achieve the optimal wind power output. Large-scale absorption; when wind power output is insufficient, on the premise of meeting the transmission capacity limit of the interconnected channel section, priority is given to meeting the load demand in the area where the wind power is located by adjusting the flexible control device and the energy storage system to discharge. If it cannot be met, the power supply device of the interconnected regional sub-network is started to provide supplementary load, and the flexible control device is fully utilized in coordination with the energy storage system and power supply to achieve flow optimization of multi-regional power systems containing wind power storage, enhance the new energy absorption capacity, give full play to the overall supply and transmission capacity of the power grid, and achieve the optimal utilization of wind power, while promoting the balance of power supply and demand to ensure the safe and stable operation of the power grid.

[0084] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for optimizing power network flow including wind power, It is characterized in that Includes steps: S1. Divide the power network into multiple regional sub-networks, and interconnect the multiple regional sub-networks, at least one of the regional sub-networks being provided with a wind farm; S2. Determine the amount of wind power generated by the wind farm, and determine a power flow control method for the regional subnetwork where the wind farm is located according to the amount of wind power; S3, performing power flow control according to the power flow control mode, the cross-sectional power transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein; The method of determining the power flow control method for the regional sub-network where the wind farm is located according to the size of the wind power includes: Determine whether the magnitude of the wind power is greater than a first preset value, and if so, determine that the power flow control mode for the regional sub-network where the wind farm is located is a power flow external transmission mode; Determine whether the magnitude of the wind power is less than a second preset value, and if so, determine that the power flow control mode for the regional sub-network where the wind farm is located is a power flow absorption mode; The step S3 comprises: S31. If the power flow control mode is a power flow transmission mode, power flow control is performed according to the cross-sectional power transmission capacity of each interconnected channel corresponding to the regional sub-network where the wind farm is located, the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located, and the types of power grid equipment contained therein; S32. If the power flow control mode is a power flow absorption mode, power flow control is performed according to the cross-sectional power transmission capacity of each interconnection channel corresponding to the regional sub-network where the wind farm is located and the types of power grid equipment included in other regional sub-networks interconnected with the regional sub-network where the wind farm is located; The S31 includes: Determine the surplus of the wind power energy, and judge whether the absorption capacity of other regional sub-networks interconnected with the regional sub-network where the wind farm is located is limited; If not limited, the surplus wind power is transmitted to other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, based on the cross-sectional transmission capacity of each interconnection channel corresponding to the regional subnetwork where the wind farm is located, while ensuring that each interconnection channel is not overloaded; If it is limited, then determine the regional subnetwork containing the energy storage device according to the type of power grid equipment contained in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, start the energy storage device, and make the energy storage device work in a charging state to assist in absorbing the remaining wind power due to the limitation; In the process of transmitting the surplus wind power to other regional subnetworks interconnected with the regional subnetwork where the wind farm is located, if the power flow of one of the interconnected regional subnetworks is greater than a third preset value, the line impedance of the interconnection channel corresponding to the other interconnected regional subnetworks is reduced to perform power flow regulation.

2. A method for optimizing power network flow including wind power according to claim 1, It is characterized in that The S32 includes: Determine, based on the wind power, the amount of load supplementation required by the regional subnetwork where the wind farm is located due to insufficient wind power; Determine a regional subnetwork including a power source according to the types of power grid equipment included in other regional subnetworks interconnected with the regional subnetwork where the wind farm is located; The regional subnetwork including the power source is controlled to supply power to the regional subnetwork where the wind farm is located based on the load supplement amount according to the cross-sectional power transmission capacity of each interconnection channel corresponding to the regional subnetwork where the wind farm is located, while ensuring that the corresponding interconnection channel is not overloaded.

3. A method for optimizing power network flow including wind power according to claim 2, It is characterized in that The determination of the regional sub-network including the power source in S32 is replaced by the determination of the regional sub-network including the energy storage device.

4. A method for optimizing power network flow including wind power according to claim 3, It is characterized in that Set the priority of energy storage device to be higher than that of power source; When the electric energy stored in the energy storage device in the regional sub-network interconnected with the regional sub-network where the wind farm is located cannot meet the load supplement amount, the regional sub-network including the power source will provide supplementary power supply.

5. A wind power network flow optimization terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the computer program, each step of the method for optimizing power flow in a power network including wind power energy as claimed in any one of claims 1 to 4 is implemented.

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