Multi-working-condition flexible control method, system, device and medium for partial power type multi-terminal interconnected diesel generator vehicle

Abstract

The present application relates to the technical field of emergency power supply control, and discloses a multi-working-condition flexible control method, system, device and medium for a partial power type multi-terminal interconnected diesel generator vehicle, comprising: moving the multi-terminal interconnected diesel generator vehicle to a target transformer area according to a system dispatching instruction; determining a current working mode of the multi-terminal interconnected diesel generator vehicle from a plurality of preset working modes according to a power failure state of the target transformer area and a spatial distance between transformer areas; configuring a control strategy of a diesel generator, a first converter port and a second converter port of the multi-terminal interconnected diesel generator vehicle, and connecting the multi-terminal interconnected diesel generator vehicle to a corresponding transformer area based on the control strategy to adjust the operation state of a power distribution network. The present application improves the flexibility and working condition adaptability of equipment deployment, provides a clear technical path for the practical engineering application of the multi-terminal interconnected diesel generator vehicle, and effectively promotes the improvement of the emergency power supply capacity of the power distribution network.

Description

Technical Field

[0001] This invention relates to the field of emergency power supply control technology, and in particular to a multi-condition flexible control method, system, equipment and medium for partial power type multi-terminal interconnected diesel generators. Background Technology

[0002] Currently, power supply assurance in response to extreme disasters mainly relies on two types of equipment and technologies: fixed flexible interconnection devices and mobile emergency power supplies, including diesel generators and energy storage vehicles. However, while fixed flexible interconnection devices offer high control precision, they suffer from high investment costs, fixed locations making flexible deployment difficult, and low utilization rates. Mobile emergency power supplies, while flexible in deployment, also face limitations such as short power supply duration, limited power capacity, and single-function operation. Therefore, existing fixed and mobile emergency support equipment is insufficient to meet the demands of improving power quality during normal operation and ensuring emergency power supply during fault conditions.

[0003] To address the limitations of existing fixed and mobile emergency response equipment, some scholars have proposed combining fixed flexible interconnection systems with mobile emergency generators to create a new type of mobile emergency equipment with multi-terminal interconnection capabilities. Among these, partial-power multi-terminal interconnected diesel generators have attracted significant attention due to their rich functionality, low modification costs, and low losses. However, existing research only focuses on the topology and grid connection of partial-power multi-terminal interconnected diesel generators, neglecting to address the selection of operating modes, control strategies, and flexible switching methods under different scenarios. This lack of systematic guidance on operating modes and control technologies hinders their widespread application. Therefore, fully utilizing the advantages of partial-power multi-terminal interconnected diesel generators and determining the grid connection methods, internal unit control strategies, and flexible switching methods for different control modes under various operating scenarios is crucial for improving the emergency power supply capabilities of distribution networks. Summary of the Invention

[0004] In view of the aforementioned existing problems, the present invention is proposed.

[0005] Therefore, this invention provides a multi-condition flexible control method, system, device, and medium for partial-power multi-terminal interconnected diesel generators, solving the problem that existing technologies only design for the topology of partial-power multi-terminal interconnected diesel generators and lack a systematic technical solution for selecting operating modes and corresponding control strategies under different application scenarios.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect, the present invention provides a multi-condition flexible control method for partial-power multi-terminal interconnected diesel engines, including: According to the system scheduling instructions, the multi-terminal interconnected diesel generator will be moved to the target station area; Based on the power failure status of the target transformer area and the spatial distance between transformer areas, the current working mode of the multi-terminal interconnected diesel generator is determined from a variety of preset working modes; Based on the current working mode, configure the control strategy for the diesel generator, first converter port and second converter port of the multi-terminal interconnected diesel generator, and connect the multi-terminal interconnected diesel generator to the corresponding distribution area based on the control strategy to adjust the operating status of the distribution network.

[0007] As a preferred embodiment of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators described in this invention, wherein determining the current operating mode of the multi-terminal interconnected diesel generator from a variety of preset operating modes includes: Obtain the cable length carried by the multi-terminal interconnected diesel generator itself, and detect the spatial distance between the target transformer area and the nearest transformer area; In response to the target transformer area being in a power outage state and the cable length being less than the spatial distance, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the third mode; In the third mode, the first and second switches are closed to allow the multi-terminal interconnected diesel generator to connect to the target station area, and the third switch is closed to start the diesel generator.

[0008] As a preferred embodiment of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators described in this invention, the step of determining the current operating mode of the multi-terminal interconnected diesel generator from multiple preset operating modes further includes: In response to the target transformer area being in a power outage state and the cable length being greater than or equal to the spatial distance, the power outage state of the nearest transformer area is determined; In response to the nearest power supply area being in a power outage state, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the first mode; in the first mode, the first switch is controlled to close so that the multi-terminal interconnected diesel generator can access the target power supply area, the second switch is controlled to close so that the multi-terminal interconnected diesel generator can access the nearest power supply area, and the third switch is controlled to close so as to start the diesel generator. In response to the nearest power supply area not being in a power failure state, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the second mode; in the second mode, the first switch is controlled to close so that the multi-terminal interconnected diesel generator can access the target power supply area, the second switch is controlled to close so that the multi-terminal interconnected diesel generator can access the nearest power supply area, and the third switch is controlled to open so as to shut down the diesel generator.

[0009] As a preferred embodiment of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators described in this invention, the step of determining the current operating mode of the multi-terminal interconnected diesel generator from multiple preset operating modes further includes: In response to the fact that the target transformer area is not in a power failure state and the cable length is greater than or equal to the spatial distance, the current working mode of the multi-terminal interconnected diesel generator is determined to be the fourth mode; in the fourth mode, the first switch is controlled to close so that the multi-terminal interconnected diesel generator can access the target transformer area, the second switch is controlled to close so that the multi-terminal interconnected diesel generator can access the nearest transformer area, and the third switch is controlled to open so as to shut down the diesel generator; In response to the fact that the target substation is not in a power failure state and the cable length is less than the spatial distance, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the fifth mode; in the fifth mode, the first switch and the second switch are controlled to close so that the multi-terminal interconnected diesel generator can access the target substation, and the third switch is controlled to open so as to shut down the diesel generator.

[0010] As a preferred embodiment of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators described in this invention, the control strategy for configuring the diesel generator of the multi-terminal interconnected diesel generator includes: The current working mode is either the first mode or the third mode, which controls the diesel generator to start and operate in the speed control mode; The current operating mode is either the second mode, the fourth mode, or the fifth mode, which controls the diesel generator to remain off.

[0011] As a preferred embodiment of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators described in this invention, the control strategy for configuring the first converter port of the multi-terminal interconnected diesel generator includes: The current operating mode is the first mode, the third mode, the fourth mode or the fifth mode, and the first converter port is controlled to operate in the DC voltage stabilization control mode. The current operating mode is the second mode, which controls the first converter port to operate in voltage and frequency control mode.

[0012] As a preferred embodiment of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators described in this invention, the control strategy for configuring the second converter port of the multi-terminal interconnected diesel generator includes: The current operating mode is the first mode, which controls the second converter port to operate in voltage-frequency control mode; The current operating mode is the second mode, which controls the second converter port to operate in the DC voltage stabilization control mode; The current working mode is the third mode, which controls the second converter port to work in reactive power compensation mode; The current working mode is the fourth mode, which controls the second converter port to work in the reactive power regulation mode; The current operating mode is the fifth mode, which controls the second converter port to operate in the power quality management mode.

[0013] Secondly, the present invention provides a multi-condition flexible control system for partial-power multi-terminal interconnected diesel engines, including: The mobile deployment module is used to move multi-terminal interconnected diesel generators to the target station area according to system scheduling instructions; The working mode determination module is used to determine the current working mode of the multi-terminal interconnected diesel generator from a variety of preset working modes based on the power failure status of the target transformer area and the spatial distance between transformer areas. The control strategy execution module is used to configure the control strategy of the diesel generator, the first converter port and the second converter port of the multi-terminal interconnected diesel generator based on the current working mode, and to connect the multi-terminal interconnected diesel generator to the corresponding distribution area based on the control strategy to adjust the operating status of the distribution network.

[0014] Thirdly, the present invention provides an electronic device, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor executes the computer-executable instructions to implement the steps of a multi-condition flexible control method for partially power type multi-terminal interconnected diesel engines.

[0015] Fourthly, the present invention provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement steps of a multi-condition flexible control method for partially power type multi-terminal interconnected diesel engines.

[0016] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention automatically matches the optimal operating mode from multiple preset operating modes based on on-site operating condition parameters such as the power outage status and spatial distance of the distribution area. Combined with the collaborative control strategy of the diesel generator and converter port, this enables a single device to flexibly cope with various application scenarios such as single-area power supply support, dual-area power supply support, dual-area power transfer support, dual-area power flow regulation, and single-area reactive power compensation. This not only expands the functional boundaries of multi-terminal interconnected diesel generators, but also reduces the energy consumption and operating costs of diesel generators through active power transfer to existing distribution areas and reactive power compensation by the converter. At the same time, it improves the flexibility and adaptability of equipment deployment, provides a clear technical path for the practical engineering application of multi-terminal interconnected diesel generators, and effectively promotes the improvement of the emergency power supply capability of the distribution network. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall flow logic of a multi-condition flexible control method for partially power multi-terminal interconnected diesel engines, provided as an embodiment of the present invention.

[0019] Figure 2 The flowchart illustrates the working mode determination process of a multi-condition flexible control method for partially power multi-terminal interconnected diesel generators, as provided in one embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram illustrating different operating modes of a multi-condition flexible control method for partially power multi-terminal interconnected diesel generators provided in an embodiment of the present invention. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] Example 1, referring to Figure 1 As one embodiment of the present invention, a multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators is provided, such as... Figure 1 The specific steps shown are as follows: S100: Move the multi-terminal interconnected diesel generator to the target station area according to the system scheduling instructions; S200: Based on the power failure status of the target transformer area and the spatial distance between transformer areas, determine the current working mode of the multi-terminal interconnected diesel generator from multiple preset working modes; S300: Based on the current working mode, configure the control strategy for the diesel generator, first converter port and second converter port of the multi-terminal interconnected diesel generator, and connect the multi-terminal interconnected diesel generator to the corresponding distribution area based on the control strategy to adjust the operating status of the distribution network.

[0023] It should be noted that this invention automatically matches the optimal operating mode from multiple preset operating modes based on on-site operating parameters such as the power outage status and spatial distance of the transformer area. Combined with the collaborative control strategy of the diesel generator and converter port, this enables a single device to flexibly cope with various application scenarios such as single-area power supply support, dual-area power supply support, dual-area power transfer support, dual-area power flow regulation, and single-area reactive power compensation. This not only expands the functional boundaries of multi-terminal interconnected diesel generators, but also reduces the energy consumption and operating costs of diesel generators through active power transfer to transformer areas and reactive power compensation of converters. At the same time, it improves the flexibility and adaptability of equipment deployment, provides a clear technical path for the practical engineering application of multi-terminal interconnected diesel generators, and effectively promotes the improvement of the emergency power supply capability of the distribution network.

[0024] Example 2, refer to Figure 2 and Figure 3 Based on the previous embodiment, this embodiment provides a specific implementation method for a multi-condition flexible control method for partially power type multi-terminal interconnected diesel engines.

[0025] In this embodiment of the invention, step S100, moving the multi-terminal interconnected diesel generator to the target station area according to the system scheduling instruction, includes: Specifically, the multi-terminal interconnected diesel generators are parked at preset stops or maintenance bases and remain on standby, receiving system dispatch instructions from the power distribution network dispatch center in real time.

[0026] Specifically, when the distribution network dispatch center detects a power supply anomaly or requires power flow regulation in a certain transformer area, the dispatch center determines the target transformer area to be connected based on the grid topology and real-time operating status, and issues a movement command containing the target transformer area's location information to the multi-terminal interconnected diesel generator. Upon receiving the system dispatch command, the multi-terminal interconnected diesel generator obtains its current geographical location through its onboard positioning system and simultaneously parses the target transformer area location information carried in the system dispatch command. The onboard route planning unit then plans a driving route from its current location to the target transformer area based on the road network information between its current location and the target transformer area's location. The multi-terminal interconnected diesel generator autonomously moves to the target transformer area according to the planned driving route. Upon arrival at the target transformer area, it confirms arrival through its onboard positioning system and sends a "positioned" signal to the distribution network dispatch center to notify the dispatch center that the multi-terminal interconnected diesel generator has completed its deployment.

[0027] Specifically, during the movement, the multi-terminal interconnected diesel generator maintains real-time communication with the power distribution network dispatch center through its onboard communication unit to receive task update instructions or temporary dispatch change instructions issued by the dispatch center. If a new dispatch instruction is received while traveling, the generator will replan its route or change the target transformer area according to the new instruction. After moving to the target transformer area, the multi-terminal interconnected diesel generator will locate itself based on the on-site working environment and use its onboard environmental perception unit to detect whether the working space around the target transformer area meets the physical conditions required for cable connection and stable equipment operation. If the conditions are met, it will send a confirmation of arrival to the dispatch center; if not, it will send a relocation request or adjustment request to the dispatch center.

[0028] It should be noted that in step S100 above, the multi-terminal interconnected diesel generator is precisely moved to the target distribution area through system scheduling instructions, enabling the equipment to quickly respond to the emergency dispatch needs of the power distribution network. This avoids the inherent defects of traditional fixed flexible interconnection devices, which have fixed locations and cannot be flexibly deployed. At the same time, compared with the inefficient mode of traditional mobile emergency power supplies that require manual on-site surveys to determine the access location, this embodiment realizes the rapid positioning and precise deployment of emergency equipment, greatly improving the response speed and arrival efficiency of emergency support equipment.

[0029] In this embodiment of the invention, step S200 determines the current operating mode of the multi-terminal interconnected diesel generator from a variety of preset operating modes based on the power failure status of the target transformer area and the spatial distance between transformer areas; such as Figure 2 Step S200 shown includes the following sub-steps A1 to A7 in detail: In A1: Obtain the length of the cable carried by the multi-terminal interconnected diesel generator. L line And detect the target station area T i With the nearest T-zone j Spatial distance between L ij ; In one feasible implementation, the multi-terminal interconnected diesel generator obtains the currently available cable length by reading the cable specification parameters pre-stored in the storage module at the time of device delivery or by using the on-board sensing unit to perform real-time length detection of the cable stored on the cable reel. L line The cable length is the fixed length configured at the factory for multi-terminal interconnected diesel engines, or the remaining usable length after length correction of the worn cable based on actual usage.

[0030] In one feasible implementation, the multi-terminal interconnected diesel generator obtains the location coordinates of its current target transformer area, and simultaneously obtains the location coordinates of the nearest transformer area by receiving transformer area topology information from the distribution network dispatch center. Based on the location coordinates of the two transformer areas, the spatial distance between them is calculated.L ij .

[0031] In A2: In response to the target area being in a power outage state and the cable length being less than the spatial distance, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the third mode; in the third mode, the first and second switches are controlled to close to allow the multi-terminal interconnected diesel generator to access the target area, and the third switch is controlled to close to start the diesel generator; Specifically, in response to the target transformer area being in a power outage state, i.e., the bus voltage of the target transformer area is 0, the multi-terminal interconnected diesel generator provides fault power supply support; and further determines the length of the cable carried by the multi-terminal interconnected diesel generator itself. L line Is it less than the target area T? i With the nearest T-zone j Spatial distance between L ij .

[0032] Specifically, if the length of the cable carried by the multi-terminal interconnected diesel engine itself... L line Less than the target station area T i With the nearest T-zone j Spatial distance between L ij Therefore, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the third mode, namely the single-station power supply support mode. In the third mode, the first switch k1 and the second switch k2 are closed to allow the multi-terminal interconnected diesel generator to connect to the target station T. i And control the third switch k3 to close to start the diesel generator.

[0033] In A3: In response to the target transformer area being in a power outage state and the cable length being greater than or equal to the spatial distance, determine the power outage state of the nearest transformer area; Specifically, in response to the target transformer area being in a power outage state, i.e., the bus voltage of the target transformer area is 0, the multi-terminal interconnected diesel generator provides fault power supply support; and further determines the length of the cable carried by the multi-terminal interconnected diesel generator itself. L line Is it greater than or equal to the target station area T? i With the nearest T-zone j Spatial distance between L ij .

[0034] Specifically, if the length of the cable carried by the multi-terminal interconnected diesel engine itself... L line Greater than or equal to the target station area T i With the nearest T-zone j Spatial distance between Lij Then, further determine the nearest station T. j The state of power failure.

[0035] In A4: In response to the nearest transformer station being in a power outage state, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the first mode; in the first mode, the first switch is controlled to close so that the multi-terminal interconnected diesel generator can access the target transformer station, the second switch is controlled to close so that the multi-terminal interconnected diesel generator can access the nearest transformer station, and the third switch is controlled to close so as to start the diesel generator. Specifically, responding to the nearest transformer station T j It is in a state of power failure, that is, the nearest transformer T j With the bus voltage at 0, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the first mode, i.e., the dual-station power supply support mode. In the first mode, the first switch k1 is closed to allow the multi-terminal interconnected diesel generator to connect to the target station, the second switch k2 is closed to allow the multi-terminal interconnected diesel generator to connect to the nearest station, and the third switch k3 is closed to start the diesel generator.

[0036] In A5: In response to the nearest transformer area not being in a power failure state, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the second mode; in the second mode, the first switch is controlled to close so that the multi-terminal interconnected diesel generator can access the target transformer area, the second switch is controlled to close so that the multi-terminal interconnected diesel generator can access the nearest transformer area, and the third switch is controlled to open so as to shut down the diesel generator. Specifically, responding to the nearest transformer station T j Not in a power outage state, i.e., the nearest transformer T j If the bus voltage is not zero, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the second mode, namely the dual-station transfer support mode. In the second mode, the first switch k1 is closed to allow the multi-terminal interconnected diesel generator to connect to the target station, the second switch k2 is closed to allow the multi-terminal interconnected diesel generator to connect to the nearest station, and the third switch k3 is opened to shut down the diesel generator.

[0037] In A6: In response to the target area not being in a power outage state and the cable length being greater than or equal to the spatial distance, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the fourth mode; in the fourth mode, the first switch is controlled to close to allow the multi-terminal interconnected diesel generator to access the target area, the second switch is controlled to close to allow the multi-terminal interconnected diesel generator to access the nearest area, and the third switch is controlled to open to shut down the diesel generator. Specifically, in response to the target station area T i The system is not in a power outage state, meaning the bus voltage of the target transformer area is not zero. Multi-terminal interconnected diesel generators are performing normal power flow scheduling. Further assessment is needed to determine the length of the cables carried by the multi-terminal interconnected diesel generators themselves. L line Is it greater than or equal to the target station area T?i With the nearest T-zone j Spatial distance between L ij .

[0038] Specifically, if the length of the cable carried by the multi-terminal interconnected diesel engine itself... L line Greater than or equal to the target station area T i With the nearest T-zone j Spatial distance between L ij Therefore, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the fourth mode, namely the dual-area power flow control mode. In the fourth mode, the first switch k1 is closed to allow the multi-terminal interconnected diesel generator to access the target area, the second switch k2 is closed to allow the multi-terminal interconnected diesel generator to access the nearest area, and the third switch k3 is opened to shut down the diesel generator.

[0039] In A7: In response to the target area not being in a power failure state and the cable length being less than the spatial distance, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the fifth mode; in the fifth mode, the first and second switches are controlled to close to allow the multi-terminal interconnected diesel generator to access the target area, and the third switch is controlled to open to shut down the diesel generator; Specifically, in response to the target station area T i The system is not in a power outage state, meaning the bus voltage of the target transformer area is not zero. Multi-terminal interconnected diesel generators are performing normal power flow scheduling. Further assessment is needed to determine the length of the cables carried by the multi-terminal interconnected diesel generators themselves. L line Is it less than the target area T? i With the nearest T-zone j Spatial distance between L ij .

[0040] Specifically, if the length of the cable carried by the multi-terminal interconnected diesel engine itself... L line Less than the target station area T i With the nearest T-zone j Spatial distance between L ij Therefore, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the fifth mode, namely the single-unit reactive power compensation mode. In the fifth mode, the first switch k1 and the second switch k2 are closed to allow the multi-terminal interconnected diesel generator to connect to the target unit area, and the third switch k3 is opened to shut down the diesel generator.

[0041] It should be noted that step S200, by detecting the power outage status of the target transformer area and the spatial distance between transformer areas, automatically matches the optimal operating mode for the current working condition from multiple preset operating modes. This completely changes the crude approach of existing technologies where multi-terminal interconnected diesel generators lack a systematic basis for selecting operating modes and rely on manual experience, thus avoiding power outages or equipment damage caused by improper mode selection. It enables the equipment to flexibly switch and adaptively match between five modes: single-area power supply support, dual-area power supply support, dual-area power transfer support, dual-area power flow control, and single-area reactive power compensation. This ensures power supply reliability and significantly enhances the equipment's adaptability under different operating conditions.

[0042] In this embodiment of the invention, step S300 configures the control strategies for the diesel generator, the first converter port, and the second converter port of the multi-terminal interconnected diesel generator based on the current operating mode, and connects the multi-terminal interconnected diesel generator to the corresponding distribution area based on the control strategies to adjust the operating status of the distribution network; such as Figure 3 The detailed steps shown include the following sub-steps B1 to B3: In B1: The control strategy for configuring the diesel generator of the multi-terminal interconnected diesel generator includes: The current operating mode is either the first or third mode, controlling the diesel generator to start and operate in speed control mode; The current operating mode is mode two, mode four, or mode five, and the diesel generator is kept off.

[0043] In B2: The control strategy for configuring the first converter port of the multi-terminal interconnected diesel engine includes: The current operating mode is either the first mode, the third mode, the fourth mode, or the fifth mode, and the first converter port is controlled to operate in the DC voltage stabilization control mode; The current operating mode is the second mode, which controls the first converter port to operate in voltage and frequency control mode.

[0044] In B3: The control strategy for configuring the second converter port of the multi-terminal interconnected diesel engine includes: The current operating mode is the first mode, which controls the second converter port to operate in voltage and frequency control mode; The current operating mode is the second mode, which controls the second converter port to operate in DC voltage stabilization control mode; The current operating mode is the third mode, which controls the second converter port to operate in reactive power compensation mode; The current operating mode is the fourth mode, which controls the second converter port to operate in reactive power regulation mode; The current operating mode is the fifth mode, which controls the second converter port to operate in power quality management mode.

[0045] It should be noted that, in this embodiment of the invention, the first converter port and the second converter port are two AC ports of the AC-AC converter (3AC-3AC converter) in the multi-terminal interconnected diesel generator. The first converter port is the AC port of the 3AC-3AC converter closer to the diesel generator. This port is connected to the output terminal of the diesel generator through a third switch to realize energy interaction between the diesel generator and the AC-AC converter. It can also serve as an interface for energy exchange with the distribution area. The second converter port is the AC port of the 3AC-3AC converter farther from the diesel generator. This port is connected to the target distribution area or the nearest distribution area through a first switch or a second switch to realize power transmission and exchange between the converter and the distribution area.

[0046] It should be noted that the two ports achieve bidirectional energy flow and conversion through the power electronic devices inside the 3AC-3AC converter, and each has independent control mode configuration capability. This allows the converter to be configured with different control functions such as voltage and frequency control, DC voltage stabilization control, reactive power compensation, reactive power regulation, or power quality management for the two ports according to control requirements under different operating conditions, so as to meet the operating requirements of multi-terminal interconnected diesel generators under different operating conditions.

[0047] In this embodiment of the invention, the current working mode is the first mode (dual-area power supply support mode): at this time, the diesel generator starts and operates in speed control mode, that is, by collecting the target area T... i Voltage frequency feedback and diesel generator valve control, thereby realizing the T area i The voltage frequency is stable, which is the target area T. i The load provides power; simultaneously, the first converter port operates in DC voltage stabilization control, providing energy to the DC side of the 3AC-3AC converter, while the second converter port operates in voltage-frequency control, providing energy to the nearest transformer area T. j It provides power to loads experiencing power failure. Through this operating mode and control method, it enables one unit to provide emergency power to multiple areas.

[0048] In this embodiment of the invention, the current operating mode is the second mode (dual-station power supply support mode): at this time, the diesel generator is shut down and not working; while the second converter port operates in DC voltage stabilization control mode, from the station T... j It absorbs energy and provides power to the DC side of the 3AC-3AC converter, while the first converter port operates under voltage-frequency control, providing power to the target area T. i This allows for the supply of power to unpowered loads. Through this operating mode and control method, the system enables the active transfer of power from the operating area to the unpowered area, thereby reducing the energy loss of the diesel generator.

[0049] In this embodiment of the invention, the current working mode is the third mode (single-area power supply support mode): at this time, the diesel generator starts and operates in speed control mode, that is, by collecting the target area T... i Voltage frequency feedback and diesel generator valve control, thereby achieving the target area T i The voltage and frequency are stable, which is the target area T. i The load provides power; simultaneously, the first converter port operates in DC voltage stabilization control, providing energy to the DC side of the 3AC-3AC converter, while the second converter port operates in reactive power compensation mode, supplying power to the nearest transformer substation T. j The system compensates for power loss loads by reducing the reactive power output of the diesel generator itself. This operating mode and control method reduces the energy consumption of the diesel generator.

[0050] In this embodiment of the invention, the current operating mode is the fourth mode (dual-area power flow control mode): at this time, the diesel generator is shut down and does not work, while the first converter port operates in DC voltage stabilization control, providing energy to the DC side of the 3AC-3AC converter and compensating the target area T. i The reactive power, while the second converter port operates in reactive power control mode, controlling the nearest transformer area T. j With target area T i The power flow between the grids. Through this operating mode and control method, the device can perform power flow regulation under normal grid conditions.

[0051] In this embodiment of the invention, the current operating mode is the fifth mode (single-area reactive power compensation mode): at this time, the diesel generator is shut down and does not work, while the first converter port operates in DC voltage stabilization control, providing energy to the DC side of the 3AC-3AC converter and compensating the target area T. i The reactive power, while the second converter port operates in power quality management mode, the management target area T i Power quality issues such as harmonics, voltage sags, and power imbalances. Through this operating mode and control method, the device can perform reactive power compensation and power quality management under normal grid conditions.

[0052] It should be noted that step S300 above, through the coordinated cooperation between the diesel generator and the converter port, realizes the flexible configuration and coordinated execution of various control modes such as diesel generator start-up and shutdown, speed control, DC voltage stability control, voltage frequency control, reactive power compensation, reactive power regulation, and power quality management at the converter port. This enables a single device to take on the dual functions of emergency power supply guarantee and normal grid regulation, thus expanding the functional boundaries of the device. Furthermore, through the active transfer of power from adjacent substation areas and reactive power compensation by the converter, the fuel consumption and operating costs of the diesel generator are significantly reduced, effectively improving the overall power supply quality and emergency supply capability of the distribution network under normal operation and fault conditions.

[0053] Example 3: This example provides a multi-condition flexible control system for partial-power multi-terminal interconnected diesel generators, including: The mobile deployment module is used to move multi-terminal interconnected diesel generators to the target station area according to system scheduling instructions; The working mode determination module is used to determine the current working mode of the multi-terminal interconnected diesel generator from a variety of preset working modes based on the power failure status of the target transformer area and the spatial distance between transformer areas. The control strategy execution module is used to configure the control strategies of the diesel generator, the first converter port and the second converter port of the multi-terminal interconnected diesel generator based on the current working mode, and to connect the multi-terminal interconnected diesel generator to the corresponding distribution area based on the control strategy to adjust the operating status of the distribution network.

[0054] It should be noted that the technical solution of the multi-condition flexible control system for partial-power multi-terminal interconnected diesel engines is based on the same concept as the technical solution of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel engines described above. For details not described in detail in the technical solution of the multi-condition flexible control system for partial-power multi-terminal interconnected diesel engines in this embodiment, please refer to the description of the technical solution of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel engines described above.

[0055] The above-mentioned unit modules can be embedded in the processor of the electronic device in hardware form or independent of it, or they can be stored in the memory of the electronic device in software form, so that the processor can call and execute the corresponding operations of the above modules.

[0056] This embodiment also provides an electronic device, which includes a processor, a memory, a communication interface, a display screen, and an input device connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through WiFi, carrier networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a multi-condition flexible control method for partially power multi-terminal interconnected diesel generators. The display screen can be a liquid crystal display (LCD) or an e-ink display. The input device can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the device's casing, or an external keyboard, touchpad, or mouse.

[0057] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method proposed in the above embodiments.

[0058] The storage medium proposed in this embodiment belongs to the same inventive concept as the method proposed in the above embodiments. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.

[0059] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory, random access memory, flash memory, hard disk, or optical disk, and includes several instructions to cause an electronic device (which may be a personal computer, server, or network device, etc.) to execute the method of the embodiments of the present invention.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the present invention.

Claims

1. A multi-condition flexible control method for partial-power multi-terminal interconnected diesel generator sets, characterized in that: include: According to the system scheduling instructions, the multi-terminal interconnected diesel generator will be moved to the target station area; Based on the power failure status of the target transformer area and the spatial distance between transformer areas, the current working mode of the multi-terminal interconnected diesel generator is determined from a variety of preset working modes; Based on the current working mode, configure the control strategy for the diesel generator, first converter port and second converter port of the multi-terminal interconnected diesel generator, and connect the multi-terminal interconnected diesel generator to the corresponding distribution area based on the control strategy to adjust the operating status of the distribution network.

2. The multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators as described in claim 1, characterized in that, The process of determining the current operating mode of the multi-terminal interconnected diesel generator from multiple preset operating modes includes: Obtain the cable length carried by the multi-terminal interconnected diesel generator itself, and detect the spatial distance between the target transformer area and the nearest transformer area; In response to the target transformer area being in a power outage state and the cable length being less than the spatial distance, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the third mode; In the third mode, the first and second switches are closed to allow the multi-terminal interconnected diesel generator to connect to the target station area, and the third switch is closed to start the diesel generator.

3. The multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators as described in claim 2, characterized in that, The process of determining the current operating mode of the multi-terminal interconnected diesel generator from multiple preset operating modes also includes: In response to the target transformer area being in a power outage state and the cable length being greater than or equal to the spatial distance, the power outage state of the nearest transformer area is determined; In response to the nearest power supply area being in a power outage state, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the first mode; in the first mode, the first switch is controlled to close so that the multi-terminal interconnected diesel generator can access the target power supply area, the second switch is controlled to close so that the multi-terminal interconnected diesel generator can access the nearest power supply area, and the third switch is controlled to close so as to start the diesel generator. In response to the nearest power supply area not being in a power failure state, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the second mode; in the second mode, the first switch is controlled to close so that the multi-terminal interconnected diesel generator can access the target power supply area, the second switch is controlled to close so that the multi-terminal interconnected diesel generator can access the nearest power supply area, and the third switch is controlled to open so as to shut down the diesel generator.

4. The multi-condition flexible control method for partial-power multi-terminal interconnected diesel engines as described in claim 3, characterized in that, The process of determining the current operating mode of the multi-terminal interconnected diesel generator from multiple preset operating modes also includes: In response to the fact that the target transformer area is not in a power failure state and the cable length is greater than or equal to the spatial distance, the current working mode of the multi-terminal interconnected diesel generator is determined to be the fourth mode; in the fourth mode, the first switch is controlled to close so that the multi-terminal interconnected diesel generator can access the target transformer area, the second switch is controlled to close so that the multi-terminal interconnected diesel generator can access the nearest transformer area, and the third switch is controlled to open so as to shut down the diesel generator; In response to the fact that the target substation is not in a power failure state and the cable length is less than the spatial distance, the current operating mode of the multi-terminal interconnected diesel generator is determined to be the fifth mode; in the fifth mode, the first switch and the second switch are controlled to close so that the multi-terminal interconnected diesel generator can access the target substation, and the third switch is controlled to open so as to shut down the diesel generator.

5. The multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators as described in claim 4, characterized in that, The control strategy for configuring the diesel generator of the multi-terminal interconnected diesel generator includes: The current working mode is either the first mode or the third mode, which controls the diesel generator to start and operate in the speed control mode; The current operating mode is either the second mode, the fourth mode, or the fifth mode, which controls the diesel generator to remain off.

6. The multi-condition flexible control method for partial-power multi-terminal interconnected diesel generators as described in claim 4, characterized in that, The control strategy for configuring the first converter port of the multi-terminal interconnected diesel generator includes: The current operating mode is the first mode, the third mode, the fourth mode or the fifth mode, and the first converter port is controlled to operate in the DC voltage stabilization control mode. The current operating mode is the second mode, which controls the first converter port to operate in voltage and frequency control mode.

7. The multi-condition flexible control method for partial-power multi-terminal interconnected diesel engines as described in claim 4, characterized in that, The control strategy for configuring the second converter port of the multi-terminal interconnected diesel generator includes: The current operating mode is the first mode, which controls the second converter port to operate in voltage-frequency control mode; The current operating mode is the second mode, which controls the second converter port to operate in the DC voltage stabilization control mode; The current working mode is the third mode, which controls the second converter port to work in reactive power compensation mode; The current working mode is the fourth mode, which controls the second converter port to work in the reactive power regulation mode; The current operating mode is the fifth mode, which controls the second converter port to operate in the power quality management mode.

8. A multi-condition flexible control system for partial-power multi-terminal interconnected diesel engines, implementing the multi-condition flexible control method for partial-power multi-terminal interconnected diesel engines as described in any one of claims 1 to 7, characterized in that, include: The mobile deployment module is used to move multi-terminal interconnected diesel generators to the target station area according to system scheduling instructions; The working mode determination module is used to determine the current working mode of the multi-terminal interconnected diesel generator from a variety of preset working modes based on the power failure status of the target transformer area and the spatial distance between transformer areas. The control strategy execution module is used to configure the control strategy of the diesel generator, the first converter port and the second converter port of the multi-terminal interconnected diesel generator based on the current working mode, and to connect the multi-terminal interconnected diesel generator to the corresponding distribution area based on the control strategy to adjust the operating status of the distribution network.

9. An electronic device comprising a memory and a processor, characterized in that: The memory is used to store computer-executable instructions, and when the processor executes the computer-executable instructions, it implements the steps of the multi-condition flexible control method for partial power type multi-terminal interconnected diesel engines as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing computer-executable instructions thereon, characterized in that: When the computer-executable instructions are executed by the processor, they implement the steps of the multi-condition flexible control method for partial-power multi-terminal interconnected diesel engines as described in any one of claims 1 to 7.

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