Power fusion device control method and device among multiple substations, computer equipment, readable storage medium and program product

Abstract

The invention relates to a control method and device for a power fusion device among multiple substations, computer equipment, a computer readable storage medium and a computer program product, relates to the field of power equipment control, and can improve the energy scheduling efficiency of a railway power supply system of the multiple substations. The method comprises the following steps: acquiring respective real-time power states of a plurality of substations; when at least one first target substation generating surplus active power due to regenerative braking of the train is determined according to the real-time power state, a power fusion device is controlled to transfer the surplus active power generated by the first target substation to other substations with power requirements; when at least one second target substation is determined in the plurality of substations according to the real-time power state, controlling the power fusion device to transfer the active power of the second target substation to other substations; the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold.

Description

Technical Field

[0001] The present application relates to the field of power equipment control technology, and in particular to a method, device, computer equipment, computer-readable storage medium, and computer program product for controlling a power inter-substation power fusing device. Background Art

[0002] In electrified railway power supply systems, utilizing energy generated by train regenerative braking is a key technology for achieving energy conservation and consumption reduction. This technology utilizes energy storage power transfer devices installed between power supply arms or substations to transfer, store, and utilize regenerative energy, thereby improving energy efficiency.

[0003] However, the control systems of these solutions are often complex, or are mainly designed for simple interactions between two substations. Their energy scheduling efficiency is limited in the actual operating environment with multiple substations, complex and changeable loads and regeneration conditions. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, device, computer equipment, computer-readable storage medium and computer program product for controlling a power inter-substation power financing device to address the above technical issues.

[0005] In a first aspect, the present application provides a method for controlling a power inter-substation power supply device, which is applied to an electrified railway power supply system including multiple substations, comprising:

[0006] Obtaining the real-time power status of each of the plurality of substations;

[0007] When at least one first target substation generating surplus active power due to train regenerative braking is determined according to the real-time power status, controlling the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand;

[0008] When at least one second target substation is determined from the plurality of substations based on the real-time power status, the power financing device is controlled to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation; and the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold.

[0009] In one embodiment, controlling the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand includes:

[0010] determining, according to the real-time power status, a power difference between the first target substation generating the surplus active power and the other substations;

[0011] The priority of power transfer is determined according to the power difference, and the power financing device is controlled to transfer the surplus active power to the other substation according to the priority; the priority increases as the power difference increases.

[0012] In one embodiment, the other substations include a first other substation with negative power and a second other substation with non-negative power;

[0013] The controlling the power financing device to transfer the surplus active power to the other substation according to the priority includes:

[0014] Calculating the total power demand of the electrified railway power supply system according to the real-time power status;

[0015] If the total power demand is in a preset high power range, obtaining a power difference between the first target substation and the second other substation;

[0016] If the power difference is greater than or equal to a first power transfer threshold, controlling the power financing device to transfer the surplus active power from the first target substation to the second other substation;

[0017] When there is surplus active power in the first target substation, the power financing device is controlled to transfer the surplus active power to the first other substation.

[0018] In one embodiment, controlling the power financing device to transfer the surplus active power to the other substation according to the priority includes:

[0019] If the total power demand of the electrified railway power supply system is in a preset low power range, determining a third other substation whose power difference is greater than or equal to a second power transfer threshold;

[0020] According to the priority, the power financing device is controlled to transfer the surplus active power to the third other substation.

[0021] In one embodiment, the reference active power is the active power of a fourth other substation, and the active power of the fourth other substation meets the power transfer condition;

[0022] The controlling the power financing device to transfer the active power of the first target substation to other substations includes:

[0023] If the total power demand of the electrified railway power supply system is within a preset high power range, obtaining the available conversion capacity of the power financing device;

[0024] Based on the power difference that is greater than or equal to a preset demand reduction threshold and the available conversion capacity, a target transfer power for power to be transferred from the second target substation to the fourth other substation is determined, and the power financing device is controlled to distribute power according to the target transfer power.

[0025] In one embodiment, controlling the power financing device to transfer the surplus active power generated by the substation to one or more other substations with power demand further includes:

[0026] When it is determined according to the real-time power status that all the substations generate surplus active power, then, according to the real-time power status, relative power requirements between two substations generating the surplus active power are determined;

[0027] A power transfer direction is determined according to the relative power demand, and the power fusing device is controlled to perform power transfer according to the power transfer direction.

[0028] In a second aspect, the present application further provides a control device for a power inter-substation power supply device, which is applied to an electrified railway power supply system including multiple substations, including:

[0029] A power status acquisition module, configured to acquire the real-time power status of each of the plurality of substations;

[0030] a regenerative energy transfer module, configured to, when at least one first target substation generating surplus active power due to train regenerative braking is determined based on the real-time power state, control the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand;

[0031] a demand reduction module configured to, when at least one second target substation is determined among the plurality of substations based on the real-time power status, control the power financing device to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation; and a power difference between the active power of the second target substation and a reference active power is greater than or equal to a preset demand reduction threshold.

[0032] In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program and is applied to an electrified railway power supply system comprising multiple substations, wherein when the processor executes the computer program, the following steps are implemented:

[0033] Obtaining the real-time power status of each of the plurality of substations;

[0034] When at least one first target substation generating surplus active power due to train regenerative braking is determined according to the real-time power status, controlling the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand;

[0035] When at least one second target substation is determined from the plurality of substations based on the real-time power status, the power financing device is controlled to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation; and the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold.

[0036] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which is applied to an electrified railway power supply system including a plurality of substations, wherein when the computer program is executed by a processor, the following steps are implemented:

[0037] Obtaining the real-time power status of each of the plurality of substations;

[0038] When at least one first target substation generating surplus active power due to train regenerative braking is determined according to the real-time power status, controlling the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand;

[0039] When at least one second target substation is determined from the plurality of substations based on the real-time power status, the power financing device is controlled to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation; and the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold.

[0040] In a fifth aspect, the present application further provides a computer program product, including a computer program, applied to an electrified railway power supply system including multiple substations, wherein when the computer program is executed by a processor, the following steps are implemented:

[0041] Obtaining the real-time power status of each of the plurality of substations;

[0042] When at least one first target substation generating surplus active power due to train regenerative braking is determined according to the real-time power status, controlling the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand;

[0043] When at least one second target substation is determined from the plurality of substations based on the real-time power status, the power financing device is controlled to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation; and the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold.

[0044] The above-mentioned method, apparatus, computer device, computer-readable storage medium, and computer program product for controlling a power financing device between multiple substations obtain the real-time power status of each of the multiple substations; when at least one first target substation generating surplus active power due to train regenerative braking is determined based on the real-time power status, the power financing device is controlled to transfer the surplus active power generated by the first target substation to other substations with power demand; when at least one second target substation is determined from the multiple substations based on the real-time power status, the power financing device is controlled to transfer the active power of the second target substation to the other substations to reduce the demand of the second target substation; the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold. In this application, by acquiring the power status of multiple substations in real time and dynamically starting two collaborative control modes based on this, on the one hand, the energy transfer of regenerative braking can capture and effectively transfer the surplus energy generated by train braking in real time, and redistribute it to substations in need, thereby greatly improving the utilization rate of regenerative energy, avoiding energy waste, and directly reducing the net energy consumption of the entire system; on the other hand, its demand reduction monitors and balances the power differences between substations, actively balances power distribution, effectively reduces instantaneous power peaks, reduces the maximum demand of the system, and alleviates the impact pressure of the power supply system, thereby improving the energy dispatch efficiency of the electrified railway power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 1. A flow chart of a method for controlling a power inter-substation power transfer device according to an embodiment of the present invention;

[0047] Figure 2 A flowchart of a method for controlling a power inter-substation power transfer device in another embodiment;

[0048] Figure 3A schematic diagram of a load active power curve before and after the implementation of the method in one embodiment;

[0049] Figure 4 A schematic diagram of a maximum demand curve of a substation before and after the implementation of the method in an embodiment;

[0050] Figure 5 This is a structural block diagram of a control device for a power inter-substation power transfer device according to an embodiment;

[0051] Figure 6 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0053] It should be noted that the terms "first", "second", etc. used in this application can be used to describe various objects, but these objects are not limited by these terms. These terms are only used to distinguish the first object from the second object. The terms "including" and "having" used in this application and any variations thereof are intended to cover non-exclusive inclusions. The term "plurality" used in this application refers to two or more. The term "and / or" used in this application refers to one of the solutions or any combination of multiple solutions.

[0054] In one embodiment, Figure 1 As shown, a method for controlling a power inter-substation power supply device is provided. This embodiment takes the method as an example of applying the method to a terminal in an electrified railway power supply system including multiple substations. The method includes the following steps:

[0055] Step S102: obtaining the real-time power status of each of the plurality of substations.

[0056] The real-time power status can be a set or a single data item representing the power operating characteristics of a substation at a specific moment. This data item may include at least the substation's active power value. The direction of this active power value (e.g., positive or negative) can be used to indicate whether the substation is in a load state (consuming power) or a regeneration state (generating surplus power). For example, a power value less than zero may correspond to a regeneration state, while a power value greater than or equal to zero may correspond to a load state.

[0057] Exemplarily, the terminal establishes communication with a power data source associated with a plurality of substations to obtain real-time power status data representing an operating status of each substation.

[0058] Specifically, the terminal can acquire data using a polling method. For example, the terminal sends data request commands to each substation in sequence according to a preset collection period (e.g., 100 milliseconds). The terminal then receives data containing the current active power value in response to the request. The terminal then parses and stores the received data, thus acquiring the real-time power status of all substations.

[0059] Alternatively, the terminal can acquire data passively. In this mode, the power data source associated with each substation is configured to actively and periodically report its real-time power status data to the terminal at a preset reporting interval, which the terminal then receives, updates, and processes.

[0060] Step S104: When at least one first target substation generating surplus active power due to train regenerative braking is determined according to the real-time power status, the power financing device is controlled to transfer the surplus active power generated by the first target substation to other substations with power demand.

[0061] The first target substation may be a substation generating excess active power due to factors such as train regenerative braking, as determined by the terminal based on the real-time power status at a specific moment. Excess active power is the portion of active power generated by the first target substation that is available for transfer to other substations in the system. The real-time power status of the first target substation is represented by a negative value. In one embodiment, identifying the first target substation and its negative excess active power is a trigger condition for initiating the regenerative braking energy transfer mode.

[0062] For example, after obtaining the real-time power status of each substation, the terminal analyzes and processes the data. If the terminal determines that the real-time active power value of at least one substation is negative, the terminal identifies the substation as the first target substation and triggers the power transfer control logic to control the power financing device to perform the power transfer operation.

[0063] Specifically, after determining the first target substation and other substations with power demand, the terminal can generate one or more power transfer instructions. These instructions can include the source address (i.e., the identifier of the first target substation), the target address (i.e., the identifier of one or more other substations), and the amount of power to be transferred. The terminal then sends these instructions to the power financing device, which drives it to perform the corresponding power conversion and transmission, thereby extracting excess active power from the grid side of the first target substation and injecting it into the grid side of the target substation.

[0064] Optionally, the terminal can employ closed-loop control. After issuing the initial transfer command, the terminal continuously monitors changes in the power status of the first target substation and other substations. If the power demand of the target substation changes, or if the surplus active power of the first target substation decreases, the terminal can dynamically adjust or terminate the power transfer command, achieving real-time, dynamic, and precise control of the energy transfer process.

[0065] Step S106: When at least one second target substation is determined from the plurality of substations based on the real-time power status, the power financing device is controlled to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation; the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold.

[0066] The second target substation can be understood as a substation whose current active power value, as determined by the terminal, differs from a reference active power value by a power difference greater than or equal to a preset demand reduction threshold. Demand reduction in this context aims to smooth the power peak at the second target substation through active power transfer, thereby reducing its maximum demand within a specific metering period, thereby optimizing grid load and potentially reducing electricity costs.

[0067] Optionally, the definition of reference active power is flexible. In one embodiment, it can be the real-time active power of another substation in the system with a lighter load. In another embodiment, the reference active power can be a fixed power baseline value preset based on grid dispatch requirements or historical load data, or it can be the average power value of multiple substations. The terminal can use different reference active powers for judgment based on different operating strategies.

[0068] For example, while continuously monitoring the real-time power status of each substation, the terminal calculates in real time the power difference between each pair of substations, or the difference between each substation's power and a reference power. When the terminal detects that the power difference is greater than or equal to a preset demand reduction threshold, it identifies the substation with the higher power as the second target substation and initiates the demand reduction control logic.

[0069] Specifically, after determining the second target substation, the terminal calculates an optimal target transfer power based on the current power difference and the available capacity of the power financing device. The terminal then generates and sends a control instruction to the power financing device, including the source address (the second target substation), the destination address (the other substation receiving power), and the target transfer power. Based on this instruction, the device transfers some of the active power from the second target substation until its power decreases or the power difference between the two substations falls below a threshold, thereby achieving peak shaving of the active power at the second target substation.

[0070] In this embodiment, by acquiring the power status of multiple substations in real time and dynamically initiating two collaborative control modes based on this information, the energy transfer function for regenerative braking can capture and effectively transfer the excess energy generated by train braking in real time, redistributing it to substations in need. This greatly improves the utilization rate of regenerative energy, avoids energy waste, and directly reduces the net energy consumption of the entire system. Secondly, the demand reduction function monitors and balances the power differences between substations, actively distributes power in a balanced manner, effectively reducing instantaneous power peaks, lowering the system's maximum demand, and alleviating the impact pressure on the power supply system, thereby improving the energy dispatch efficiency of the electrified railway power supply system.

[0071] In an exemplary embodiment, controlling the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand includes:

[0072] Based on the real-time power status, the power difference between the first target substation generating surplus active power and other substations is determined. Based on the power difference, the priority of power transfer is determined, and according to the priority, the power financing device is controlled to transfer the surplus active power to other substations. The priority increases as the power difference increases.

[0073] The power difference can be the difference between the active power of the first target substation (i.e., the generator of surplus power) and the active power of another substation with power demand. This power difference intuitively reflects the degree of energy imbalance between the two. The power transfer priority can be a weight or level assigned to different potential power recipients, indicating the priority of energy transfer. This priority is used to guide the order or proportion of surplus active power allocation when there are multiple power demanders.

[0074] For example, after determining the first target substation, the terminal calculates the power difference between it and other substations with power demands and determines a priority based on the power difference. This priority can be used to guide a variety of different power transfer strategies, such as a sequential transfer strategy in which the terminal transfers power one by one according to priority; a proportional allocation strategy that determines weights based on priority and allocates power to multiple target substations simultaneously or in a time-sharing manner; or a hybrid strategy that combines the two to achieve flexible and efficient energy scheduling.

[0075] Specifically, the terminal can also adopt a threshold-based priority classification strategy. For example, the terminal can preset multiple power difference thresholds, such as 15MW and 5MW, to classify power demand into high, medium, and low priorities. When allocating power, the terminal will prioritize transferring excess power to all high-priority substations (power difference > 15MW). If there is still excess power, it will be allocated to medium-priority substations (5MW < power difference ≤ 15MW), and so on.

[0076] In this embodiment, by introducing a priority determination mechanism based on power difference, intelligent and orderly management of surplus active power distribution is achieved, ensuring that energy always flows to where it is most needed, and can respond and alleviate the most urgent power gap in the system more quickly, thereby improving the accuracy and efficiency of the entire control strategy.

[0077] In an exemplary embodiment, controlling the power financing device to transfer surplus active power to other substations according to priority includes:

[0078] The total power demand of the electrified railway power supply system is calculated based on the real-time power status. If the total power demand is within a preset high power range, the power difference between the first target substation and the second other substation is obtained. If the power difference is greater than or equal to a first power transfer threshold, the power financing device is controlled to transfer surplus active power from the first target substation to the second other substation. If there is surplus active power in the first target substation, the power financing device is controlled to transfer the surplus active power to the first other substation.

[0079] Other substations include a first other substation with negative power and a second other substation with non-negative power. The first other substation refers to any substation in the system other than the surplus active power generator whose own power state is also negative. The second other substation refers to any substation in the system other than the surplus active power generator whose own power state is non-negative (i.e., under load).

[0080] The preset high power range can be a total power threshold or range used to determine whether the entire electrified railway power supply system is operating in a high-load state. In one embodiment, this refers to a total traction power demand greater than or equal to 25 MW. The first power transfer threshold is a power difference threshold used within this high power range to determine whether to initiate power transfer.

[0081] For example, the terminal first calculates and determines whether the total power demand of the current system falls within a preset high power range. Optionally, the total power demand can be calculated as a simple algebraic sum of the power values ​​of all substations in the system.

[0082] If so, the terminal initiates a power transfer strategy that prioritizes meeting the load side demand, that is, the surplus active power is first transmitted to the substation in the load state, and then energy balancing is considered to the substation in the same regeneration state.

[0083] For example, suppose substation C is the first target substation generating surplus power, substation A is the second other substation with non-negative power, and substation B is the first other substation with negative power. The terminal first determines whether the power difference between C and A is greater than or equal to the first power transfer threshold. If so, the terminal controls the power financing device to preferentially transfer C's surplus power to A. After this transfer process is completed, the terminal reassesses whether C still has surplus active power. If so, it controls the power financing device to transfer this surplus power to substation B.

[0084] In another optional solution, when the terminal transfers power to the second other substation (such as A), it is not necessary to transfer all the surplus power. Instead, it can transfer only a part of it, so that the power of A drops to a safe or economical operating range, and then transfer the remaining power to the first other substation (such as B) to achieve more refined power distribution.

[0085] In this embodiment, by setting and executing control logic that prioritizes the transfer of excess power to load-side substations under high-load conditions, the regenerative energy utilization path is optimized. This approach directly utilizes regenerative energy to offset traction loads, rather than simply balancing it among different regenerative sources. This allows for the fastest and most effective reduction in the system's overall net power consumption and maximum demand, resulting in higher energy efficiency and economic benefits compared to other transfer methods.

[0086] In an exemplary embodiment, controlling the power financing device to transfer surplus active power to other substations according to priority includes:

[0087] If the total power demand of the electrified railway power supply system is in a preset low power range, a third other substation with a power difference greater than or equal to a second power transfer threshold is determined; according to the priority, the power financing device is controlled to transfer the surplus active power to the third other substation.

[0088] The preset low power range can be a total power range used to determine whether the entire electrified railway power supply system is in a low-load operating state. In one embodiment, the preset low power range is 0 to 25 MW. The second power transfer threshold is a power difference threshold used in this low power range to determine whether to initiate power transfer.

[0089] For example, when the terminal determines that the current total system power demand is within a preset low power range, it activates a simplified energy transfer determination logic. Under this logic, the terminal selects other substations whose power difference with the first target substation is greater than or equal to the second power transfer threshold and selects them as candidate power recipients, namely, the third other substations.

[0090] Specifically, assuming the system is in a low power range, the first target substation D generates surplus power. The terminal will traverse all other substations (such as E and F) and calculate the power difference and If the terminal determines that is greater than the second power transfer threshold, and If the power difference between substation E and F is less than the threshold, the terminal will only determine substation E as the third other substation and, based on its priority, control the power financing device to transfer all surplus power to substation E. In one embodiment, if the terminal determines that the power differences between multiple other substations (such as E and F) are greater than or equal to the second power transfer threshold, all of these substations are determined to be the third other substations.

[0091] In this embodiment, by adopting a simplified judgment logic based on a specific threshold when the system is running at low load, the control strategy is differentiated and adapted under different system load levels, thereby achieving the purpose of simplifying the control algorithm, reducing the terminal computing load, and ensuring that the system can still operate stably under low power disturbances while ensuring the effective utilization of energy, thereby improving the robustness and applicability of the entire control method.

[0092] In an exemplary embodiment, controlling the power financing device to transfer active power from the first target substation to other substations includes:

[0093] If the total power demand of the electrified railway power supply system is within a preset high power range, the available converter capacity of the power financing device is obtained; based on the power difference greater than or equal to the preset demand reduction threshold and the available converter capacity, the target transfer power to be transferred from the second target substation to the fourth other substation is determined, and the power financing device is controlled to distribute power according to the target transfer power.

[0094] The reference active power is the active power of the fourth other substation, and the active power of the fourth other substation meets the power transfer conditions. The fourth other substation may be a lightly loaded substation that receives power from the second target substation in demand reduction mode. The power transfer conditions may be a set of or a single preset logical condition used to determine whether a candidate substation is suitable for receiving transferred power when selecting a power recipient (i.e., the fourth other substation) in demand reduction mode. These conditions are designed to ensure the safety and effectiveness of the power transfer operation. Exemplarily, meeting the power transfer conditions may include one or more of the following: its active power is at a preset low level, ensuring its ability to absorb the incoming power; its key electrical parameters (e.g., voltage and frequency) are stable within normal ranges; and the substation is not experiencing any faults or undergoing maintenance.

[0095] Available conversion capacity refers to the maximum power limit remaining in the power financing device under the current working state and can be used to perform power transfer.

[0096] For example, when entering demand reduction mode, the terminal not only determines the source and target of power transfer, but also performs an accurate transfer amount calculation. This calculation aims to achieve maximum load balancing while ensuring that the operation does not exceed the physical capabilities of the power financing device.

[0097] Specifically, assume that the power of the second target substation A is 30 MW, and the power of the fourth other substation B is 10 MW. The power difference is 20 MW, which exceeds the demand reduction threshold. At the same time, the terminal obtains a total capacity of 10 MW from the power financing device, while the occupied capacity is 2 MW, resulting in an available conversion capacity of 8 MW. At this point, the terminal theoretically needs to transfer 10 MW of power (to balance the two at 20 MW), but is limited by the available capacity of 8 MW. Therefore, the terminal determines the target transfer power as 8 MW and controls the device to transfer 8 MW of power from A to B.

[0098] Optionally, the terminal can also incorporate other limiting factors when determining the target transfer power. For example, in addition to available converter capacity, it can also consider line transmission losses or the load stability of the target substation to modify the theoretical power value to be transferred, thereby generating a more secure and reliable target transfer power value that integrates multiple constraints.

[0099] In this embodiment, by considering not only the load balancing requirement but also the key physical constraint of the available capacity of the power financing device itself when calculating the transfer power, a closed-loop and refined demand reduction control is achieved, achieving the goal of effectively reducing power peaks while ensuring that power transfer operations are always carried out within the safe operating area of ​​the equipment.

[0100] In an exemplary embodiment, controlling the power financing device to transfer the surplus active power generated by the substation to one or more other substations with power demand also includes:

[0101] When it is determined based on the real-time power status that all substations generate surplus active power, the relative power requirements between the substations generating the surplus active power are determined based on the real-time power status; based on the relative power requirements, the power transfer direction is determined, and the power financing device is controlled to transfer power according to the power transfer direction.

[0102] Relative power demand is a relative indicator used by terminals to compare the regenerative power capacity of multiple substations under special operating conditions where multiple substations generate surplus active power. The smaller the surplus power value of a substation (i.e., the closer its negative value is to zero), the higher its relative power demand is, as it requires less energy to dissipate or transfer, and is more capable of accepting power from other substations. The power transfer direction is the energy flow path, determined by the terminal based on the relative power demand, from substations with lower relative demand to those with higher relative demand.

[0103] For example, when the terminal detects that all participating substations in the system are generating excess active power (i.e., their real-time power states are all negative), it triggers a power balancing control logic internal to the regenerative braking system. This logic aims to balance the braking energy dissipation pressure at each node by performing a secondary power transfer between these substations generating excess power.

[0104] In a specific embodiment, the real-time power of substation G is -5 MW, and the real-time power of substation H is -15 MW. The terminal determines that both substations have surplus power. Through comparison, the terminal determines that substation G has a smaller negative power value and a higher relative power demand. Therefore, the terminal determines the power transfer direction to be from H to G and generates a control instruction to transfer part of H's surplus power (for example, 5 MW) to G. After the transfer, G's power becomes -10 MW, and H's power becomes -10 MW, achieving a balanced braking load between the two substations.

[0105] In this embodiment, an internal balancing mechanism based on relative power demand is introduced under extreme operating conditions where all substations have excess power. This achieves coordinated management of regenerative braking energy and load balancing across the entire system. This prevents overload or damage to braking energy-consuming devices (such as brake resistors) at individual substations due to excessive regenerative power. It also maximizes the system's overall ability to absorb and utilize regenerative energy, improving system safety and operational robustness.

[0106] In one embodiment, an energy storage power-flow device is provided between the two power supply arms, and the device combines an energy storage system with a power-flow converter. Through this device, the transfer, storage and release of regenerative energy can be realized, and functions such as reactive power compensation, harmonic control and three-phase imbalance regulation can be realized at the same time, thereby achieving the technical effect of improving the power quality and energy utilization efficiency of the traction network. However, the inventors found in their research that this existing technical solution has at least the following deficiencies: its system structure is relatively complex, and its application scenarios are limited, especially under conditions where the regenerative energy is small or the load does not have significant complementarity, its technical effect will be limited.

[0107] In another embodiment, an energy management strategy based on an energy storage-type railway power conditioner, designed to address technical issues such as high traction load volatility and low regenerative braking energy utilization by constructing a two-tier control architecture, claims to have achieved significant technical results in peak shaving and valley filling, as well as improving power factor. However, this strategy's technical solution is based on the assumption that the traction load and regenerative energy characteristics exhibit specific regularities. It fails to provide in-depth analysis and effective solutions for the irregular, uncertain factors present in complex actual operating environments and their impact on control effectiveness.

[0108] In this context, the present application provides a control method for a power inter-substation power transfer device that can adapt to complex operating conditions and has better robustness to uncertain disturbances. For example, in an electrified railway power supply system containing multiple substations, the process of the method provided by the present application is as follows: Figure 2 As shown, the steps include:

[0109] Step S201: Acquire and update the real-time power status of each substation, analyze the real-time power status in real time, and execute corresponding control logic according to different scenarios.

[0110] In step S202, if the terminal determines, based on the analysis of the real-time power status, that there is at least one first target substation in the system that generates surplus active power due to regenerative braking, the regenerative braking energy transfer mode is started.

[0111] In this mode, the core tasks of the terminal may include calculating the power difference between the first target substation and other substations with power demand, and determining the priority of power transfer based on the power difference, where the side with a larger power difference is given a higher priority to ensure that energy is directed to where it is most needed.

[0112] Specifically, the application of this priority is closely related to the total system power demand. When the terminal determines that the total system power demand is within a preset high power range, it will implement a strategy with the highest efficiency, which is to prioritize transferring excess power to the second other substation, which is currently in a loaded state. After meeting its demand, if there is still power remaining, this excess power will be transferred to the first other substation, which is also in a regenerative state. Conversely, when the total system power demand is within a preset low power range, the terminal will implement a simplified strategy, which is to first screen qualified power recipients (i.e., the third other substation) based on a second power transfer threshold, and then apply the above priority rules to these screened qualified recipients for orderly power allocation.

[0113] In step S203, if the terminal determines that all relevant substations are generating surplus power, it calculates the relative power demands between each substation and determines the power transfer direction based on these relative demands. Specifically, it determines the power transfer direction from a substation with relatively lower demand (i.e., more surplus power) to a substation with relatively higher demand (i.e., less surplus power). By performing internal load balancing among the regenerative sources, it collaboratively manages the braking energy of the entire system and prevents overloading of any single node.

[0114] In step S204, if the system lacks significant excess power but there is a significant load imbalance between substations, and the power difference exceeds the preset demand reduction threshold, demand reduction mode is activated. In this mode, the terminal identifies the high-load substation as the second target substation and, combining the available conversion capacity of the power financing device with the current power difference, accurately calculates a specific target transfer power. The control device then executes this fixed power transfer, thereby achieving peak load shaving and valley filling for the second target substation.

[0115] In an exemplary embodiment, the present application controls the power financing device in the power supply system through the above method within a preset period (such as 24 hours).

[0116] It can be found that Figure 3 As shown in the figure, the dark curve represents the active power change trend before power merging, and the light curve represents the result after power merging. By comparison, it can be seen that the power merging device control method smoothes power fluctuations, especially during periods of high power peaks, where power peaks are effectively reduced. In addition, after power merging, the system's power distribution under low-load conditions is more balanced, and the overall load is optimized. The results verify the effectiveness of the regenerative braking energy utilization and demand reduction control strategy. Through the regulation of the power merging device, not only the utilization efficiency of regenerative braking energy is improved, but also the maximum demand is reduced, achieving a more balanced power distribution and improving the stability and economy of system operation.

[0117] As shown in Figure 4, the dark curve represents the maximum demand trend before power merging, while the light curve shows the result after power merging. This comparison shows that the power merging device control method is effective in reducing maximum demand. After merging, the power peak decreases significantly, and the curve fluctuation amplitude is smoothed, effectively reducing the pressure on the system during high-load periods. The results show that by rationally regulating the power merging device, the system's power demand peak can be effectively reduced, the overall load distribution can be optimized, and the stability and economic efficiency of grid operation can be improved. The power merging device control method not only reduces maximum demand but also provides strong support for further improving the system's safety margin and operating efficiency.

[0118] It should be understood that, although the various steps in the flowcharts involved in the above embodiments are displayed in sequence according to the instructions of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of the steps or stages in other steps or other steps. It is understandable that the various steps in different embodiments can be freely combined as needed, and the various non-contradictory schemes formed by the combination all fall within the scope of protection of this application.

[0119] Based on the same inventive concept, embodiments of the present application also provide a device for controlling a power fusing device between multiple substations for implementing the aforementioned method for controlling a power fusing device between multiple substations. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the device for controlling a power fusing device between multiple substations provided below can be found in the aforementioned definition of the method for controlling a power fusing device between multiple substations, and will not be further elaborated here.

[0120] In an exemplary embodiment, Figure 5 As shown, a power inter-substation power financing device control device is provided, including: a power state acquisition module 510, a regenerative energy transfer module 520 and a demand reduction module 530, wherein:

[0121] A power status acquisition module 510 is configured to acquire the real-time power status of each of the plurality of substations;

[0122] The regenerative energy transfer module 520 is configured to, when at least one first target substation generating surplus active power due to train regenerative braking is determined based on the real-time power status, control the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand;

[0123] The demand reduction module 530 is configured to control the power financing device to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation when at least one second target substation is determined from the multiple substations based on the real-time power status; the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold.

[0124] In one embodiment, the regenerative energy transfer module 520 is further configured to determine, based on the real-time power status, a power difference between the first target substation generating the surplus active power and other substations; determine a priority of power transfer based on the power difference; and control the power financing device to transfer the surplus active power to the other substations according to the priority; the priority increases as the power difference increases.

[0125] In one embodiment, the regenerative energy transfer module 520 is further configured to calculate a total power demand of the electrified railway power supply system based on the real-time power status; if the total power demand is in a preset high power range, obtain a power difference between the first target substation and the second other substation; if the power difference is greater than or equal to a first power transfer threshold, control the power financing device to transfer the surplus active power from the first target substation to the second other substation; and if there is surplus active power in the first target substation, control the power financing device to transfer the surplus active power to the first other substation.

[0126] In one embodiment, the regenerative energy transfer module 520 is further configured to, if the total power demand of the electrified railway power supply system is in a preset low power range, determine a third other substation whose power difference is greater than or equal to a second power transfer threshold; and control the power financing device to transfer the surplus active power to the third other substation according to the priority.

[0127] In one embodiment, the demand reduction module 530 is further configured to obtain the available conversion capacity of the power financing device if the total power demand of the electrified railway power supply system is within a preset high power range; determine a target transfer power to be transferred from the second target substation to the fourth other substation based on the power difference greater than or equal to a preset demand reduction threshold and the available conversion capacity; and control the power financing device to distribute power according to the target transfer power.

[0128] In one embodiment, the regenerative energy transfer module 520 is further configured to, when it is determined according to the real-time power status that all the substations generate surplus active power, determine the relative power requirements between each of the substations generating the surplus active power according to the real-time power status; determine the power transfer direction according to the relative power requirements, and control the power financing device to perform power transfer according to the power transfer direction.

[0129] Each module in the aforementioned inter-substation power intercommunication device control device may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in hardware form, or may be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0130] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 6As shown. The computer device includes a processor, memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals via wired or wireless means, and the wireless means can be implemented via Wi-Fi, a mobile cellular network, near-field communication (NFC), or other technologies. When executed by the processor, the computer program implements a method for controlling a power inter-substation power supply device. The display unit of the computer device is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse.

[0131] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0132] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0133] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0134] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0135] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0136] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0137] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0138] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0139] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for controlling a power inter-substation power transfer device, characterized in that: Applied to an electrified railway power supply system comprising multiple substations, the method comprises: Obtaining the real-time power status of each of the plurality of substations; When at least one first target substation generating surplus active power due to train regenerative braking is determined according to the real-time power status, controlling the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand; When at least one second target substation is determined from the plurality of substations based on the real-time power status, the power financing device is controlled to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation; and the power difference between the active power of the second target substation and the reference active power is greater than or equal to a preset demand reduction threshold.

2. The method according to claim 1, characterized in that The controlling the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand includes: determining, according to the real-time power status, a power difference between the first target substation generating the surplus active power and the other substations; The priority of power transfer is determined according to the power difference, and the power financing device is controlled to transfer the surplus active power to the other substation according to the priority; the priority increases as the power difference increases.

3. The method according to claim 2, characterized in that The other substations include a first other substation with negative power and a second other substation with non-negative power; The controlling the power financing device to transfer the surplus active power to the other substation according to the priority includes: Calculating the total power demand of the electrified railway power supply system according to the real-time power status; If the total power demand is in a preset high power range, obtaining a power difference between the first target substation and the second other substation; If the power difference is greater than or equal to a first power transfer threshold, controlling the power financing device to transfer the surplus active power from the first target substation to the second other substation; When there is surplus active power in the first target substation, the power financing device is controlled to transfer the surplus active power to the first other substation.

4. The method according to claim 2, characterized in that The controlling the power financing device to transfer the surplus active power to the other substation according to the priority includes: If the total power demand of the electrified railway power supply system is in a preset low power range, determining a third other substation whose power difference is greater than or equal to a second power transfer threshold; According to the priority, the power financing device is controlled to transfer the surplus active power to the third other substation.

5. The method according to claim 1, characterized in that The reference active power is the active power of the fourth other substation, and the active power of the fourth other substation meets the power transfer condition; The controlling the power financing device to transfer the active power of the first target substation to other substations includes: If the total power demand of the electrified railway power supply system is within a preset high power range, obtaining the available conversion capacity of the power financing device; Based on the power difference that is greater than or equal to a preset demand reduction threshold and the available conversion capacity, a target transfer power for power to be transferred from the second target substation to the fourth other substation is determined, and the power financing device is controlled to distribute power according to the target transfer power.

6. The method according to any one of claims 1 to 5, characterized in that The controlling the power financing device to transfer the surplus active power generated by the substation to one or more other substations with power demand also includes: When it is determined according to the real-time power status that all the substations generate surplus active power, then, according to the real-time power status, relative power requirements between two substations generating the surplus active power are determined; A power transfer direction is determined according to the relative power demand, and the power fusing device is controlled to perform power transfer according to the power transfer direction.

7. A power inter-substation power transfer device control device, characterized in that: Applicable to an electrified railway power supply system comprising multiple substations, the device comprises: A power status acquisition module, configured to acquire the real-time power status of each of the plurality of substations; a regenerative energy transfer module, configured to, when at least one first target substation generating surplus active power due to train regenerative braking is determined based on the real-time power state, control the power financing device to transfer the surplus active power generated by the first target substation to other substations with power demand; a demand reduction module configured to, when at least one second target substation is determined among the plurality of substations based on the real-time power status, control the power financing device to transfer the active power of the second target substation to other substations to reduce the demand of the second target substation; and a power difference between the active power of the second target substation and a reference active power is greater than or equal to a preset demand reduction threshold.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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