Multi-transformer-area direct current power distribution network energy mutual aid coordination control method and system

Abstract

The invention discloses a multi-area DC power distribution network energy mutual aid coordination control method and system. The method comprises the following steps: establishing a plurality of port energy routers based on a target DC power distribution network; presetting a first judgment logic, and judging the working mode of the target DC power distribution network according to the first judgment logic; and setting a first interaction proportion of the plurality of port energy routers according to the working mode to carry out coordination control. The working mode of an energy router port converter connected with each district power distribution network is set to be a coordinated mutual aid, district voltage stabilization or locking mode, and the working modes are respectively aimed at the working conditions of energy outward supply, energy absorption and independent operation of each district power distribution network. And adaptive droop control is adopted for the port converter in the coordinated mutual aid mode, adaptive adjustment of a droop coefficient is realized, balanced output of the port converter in the coordinated mutual aid mode is further coordinated, and the targets of power balance and stable voltage operation of the multi-transformer-area DC power distribution network are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current distribution networks, and in particular to a method and system for energy mutual assistance and coordinated control of direct current distribution networks in multiple distribution areas. Background Art

[0002] The traditional distribution network in the substation area is responsible for supplying electricity to the loads within the area through AC transformers. With the emergence of new energy and new loads, the stable operation of the distribution network in the substation area has been greatly uncertain. In order to ensure the health and stability of the distribution network, it is necessary to fully mobilize the adjustable resources within the distribution network in each substation area, and utilize the differences in the source, load, storage and other resources configured in the distribution networks in different substation areas to achieve energy mutual assistance and coordinated stability between the distribution networks in the substation area.

[0003] The key to achieving energy mutual assistance between distribution networks in different areas is to build pipelines for energy balance and free flow between distribution networks in different areas. At the same time, it is also necessary to ensure the safety of independent operation of distribution networks in different areas and prevent the transmission of faults between distribution networks in different areas. Multi-port energy routers can achieve the free flow of energy between distribution networks in different areas through port modules adapted to the distribution networks in different areas. At the same time, the isolated architecture can effectively prevent the transmission of electrical faults between distribution networks in different areas. Multi-port energy routers provide an effective means for the integration and energy mutual assistance of distribution networks in different areas.

[0004] In order to give full play to the energy router's role in optimizing the dispatch of energy between multiple distribution networks, it is often necessary to have a close coupling relationship between the energy router and the energy control center of the distribution network. According to the dispatch instructions of the energy control center, the energy router realizes the energy mutual assistance between the distribution networks in the substations accordingly. However, the time scale of the optimization dispatch instructions of the energy management center is relatively large, and the time scale of the control instructions to ensure the stable operation of the distribution network in the substation is relatively small. It is necessary for the converters at each port of the energy router to respond to the stable control instructions in a timely manner. Therefore, it is necessary to implement a stable control strategy with adaptive capabilities at the coordinated control level of the energy router. The existing coordinated control method of the energy router focuses more on the execution of the upper-level optimization dispatch instructions, and cannot provide a rapid response capability to the stable operation of the distribution network in the substation at the coordinated control level. Summary of the invention

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a method and system for energy mutual assistance and coordinated control of a DC distribution network in multiple substations, which can solve the problems mentioned in the background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides a method for coordinated control of energy mutual assistance in a multi-station DC distribution network, comprising: establishing a plurality of port energy routers based on a target DC distribution network; presetting a first judgment logic, and judging a working mode of the target DC distribution network according to the first judgment logic, wherein the working mode includes a first working mode, a second working mode, and a third working mode; setting a first interaction ratio of a plurality of port energy routers according to the working mode, and performing coordinated control according to the first interaction ratio.

[0009] As a preferred solution of the energy mutual assistance coordinated control method of a multi-station DC distribution network according to the present invention, wherein: the first interaction ratio of a plurality of port energy routers is set according to the working mode, and the coordinated control according to the first interaction ratio includes:

[0010] Preset the first ratio acquisition logic;

[0011] The first ratio acquisition logic is used to acquire the corresponding first interaction ratio for the first working mode, the second working mode and the third working mode.

[0012] As a preferred solution of the energy mutual assistance coordinated control method of multiple DC distribution networks of the present invention, wherein: the preset first judgment logic, judging the working mode of the target DC distribution network according to the first judgment logic includes:

[0013] Performing a first logical judgment on any target DC distribution network;

[0014] Obtaining a number of DC distribution networks in different areas as target DC distribution networks;

[0015] Establish several energy routers with the same number of ports according to the number of substations.

[0016] As a preferred solution of the energy mutual assistance and coordinated control method of multiple DC distribution networks in the present invention, the establishment of several port energy routers based on the target DC distribution network includes:

[0017] Each port of the energy routers having several ports is connected to a DC distribution network in an area through a port converter, and a transformer isolation type architecture is adopted between the ports to electrically isolate the DC distribution networks in the areas.

[0018] As a preferred solution of the energy mutual assistance and coordinated control method of multiple DC distribution networks in the present invention, the establishment of a plurality of port energy routers based on the target DC distribution network also includes:

[0019] Each port converter of the plurality of port energy routers is configured with a corresponding port controller to perform port voltage control.

[0020] As a preferred solution of the multi-zone DC distribution network energy mutual assistance coordinated control method described in the present invention, wherein: the establishment of a plurality of port energy routers based on the target DC distribution network also includes: the plurality of port energy routers are configured with a coordination controller.

[0021] As a preferred solution of the energy mutual assistance coordinated control method of multiple-zone DC distribution networks described in the present invention, wherein: the coordinated controller includes an adaptive droop controller and a multi-agent droop coefficient generator;

[0022] The adaptive droop controller is used to coordinate the output power of the port converters so that different port converters reach an output ratio of a first interactive ratio;

[0023] The multi-agent droop coefficient generator adaptively generates the droop coefficient of the droop controller when the output proportion of converters at different ports reaches a first interaction ratio.

[0024] In a second aspect, the present invention provides a multi-zone DC distribution network energy mutual assistance coordinated control system, comprising:

[0025] A model building module, used to build several port energy routers based on the target DC distribution network;

[0026] A judgment module, configured to preset a first judgment logic, and judge an operating mode of a target DC distribution network according to the first judgment logic, wherein the operating mode includes a first operating mode, a second operating mode and a third operating mode;

[0027] The control module is used to set a first interaction ratio of a plurality of port energy routers according to the working mode, and perform coordinated control according to the first interaction ratio.

[0028] In a third aspect, the present invention provides an electronic device, comprising:

[0029] Memory and processor;

[0030] The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the method for energy mutual assistance and coordinated control of DC distribution networks in multiple substations are implemented.

[0031] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the method for coordinated control of energy mutual assistance of DC distribution networks in multiple substations.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a method and system for coordinated control of energy mutual assistance of multi-station DC distribution networks, establishes several port energy routers based on the target DC distribution network; presets a first judgment logic, and judges the working mode of the target DC distribution network according to the first judgment logic, and the working mode includes a first working mode, a second working mode and a third working mode; sets a first interaction ratio of several port energy routers according to the working mode, and performs coordinated control according to the first interaction ratio. Based on the use of isolated multi-port energy routers to connect multiple station DC distribution networks, the present application sets the working mode of the energy router port converter connected to each station distribution network to coordinated mutual assistance, station voltage stabilization or locking mode, respectively for the energy outward supply, energy absorption and independent operation conditions of each station distribution network. Adaptive droop control is adopted for the port converter in the coordinated mutual assistance mode to realize adaptive adjustment of the droop coefficient, and further coordinates the balanced output of the port converter in the mutual assistance mode to achieve the goal of power balance and voltage stability of the multi-station DC distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the overall process logic of a method for coordinated control of energy mutual assistance in a DC distribution network of multiple distribution areas according to an embodiment of the present invention;

[0035] Figure 2 It is an electrical network diagram of a method for coordinated control of energy mutual assistance of DC distribution networks in multiple substations according to an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of a four-port energy router for a method for coordinated control of energy mutual assistance in a DC distribution network of multiple distribution areas according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the principle of a four-port energy router coordination controller for a method for coordinated control of energy mutual assistance in a multi-zone DC distribution network according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0039] Example 1

[0040] Reference Figure 1-Figure 4 As an embodiment of the present invention, a method for coordinated control of energy mutual assistance of a DC distribution network in multiple substations is provided, which specifically includes:

[0041] There are some technical defects and deficiencies in the existing related technologies. For example, there is a lack of effective real-time response mechanism in the energy mutual assistance and coordinated control of multi-station DC distribution networks, which leads to the inability to quickly adjust the output power of each port converter to meet the real-time needs of the power grid when facing grid load fluctuations. In addition, the existing coordinated control strategies often fail to take into account the independent operation safety of each station DC distribution network and the overall coordinated stability.

[0042] The present application provides a method that can effectively solve the above-mentioned problems. Next, a plurality of embodiments will be combined to explain in detail how to implement the energy mutual assistance and coordinated control method of the multi-station DC distribution network.

[0043] Figure 1 A method flow chart of a method and system for energy mutual assistance and coordinated control of a multi-zone DC distribution network is shown, including:

[0044] S101, establishing a plurality of port energy routers based on a target DC distribution network;

[0045] In an optional embodiment, the establishment of a plurality of port energy routers based on the target DC distribution network can be achieved through simulation, actual construction of a test platform, or through software defined network (SDN) technology. For example, through simulation, a virtual DC distribution network environment can be built on a computer to simulate the energy flow and exchange between DC distribution networks in different areas.

[0046] In an optional embodiment, when actually building a test platform, real power electronic equipment and control devices can be used to verify the feasibility and effectiveness of the proposed coordinated control method in an actual environment.

[0047] In an optional embodiment, software-defined networking technology can provide a flexible network architecture that allows the configuration and behavior of the network to be dynamically adjusted through software programming to adapt to different operating conditions and requirements.

[0048] It should be noted that the establishment of the port energy router is the basis of the entire coordinated control method. It needs to be able to match the characteristics of the target DC distribution network and have good scalability and flexibility.

[0049] In the embodiment of the present application, a test platform is actually constructed to establish a plurality of port energy routers based on the target DC distribution network, including:

[0050] Each port of a plurality of port energy routers is connected to a DC distribution network in a substation through a port converter, and a transformer isolation type architecture is adopted between the ports to electrically isolate the DC distribution networks in each substation.

[0051] In the embodiment of the present application, establishing a plurality of port energy routers based on the target DC distribution network further includes: each port converter of the plurality of port energy routers is configured with a corresponding port controller to perform port voltage control.

[0052] In the embodiment of the present application, establishing a plurality of port energy routers based on the target DC distribution network further includes: configuring a coordination controller for the plurality of port energy routers.

[0053] In an optional embodiment, the following can be constructed: Figure 2 The actual test platform of the schematic diagram shown is Figure 2 As shown, it is an embodiment of a multi-station DC distribution network applicable to the present invention. The distribution network can include multiple DC microgrids. There are no special requirements for the network topology, the type of power supply in the network, and the type of load. All are applicable to the coordinated control method of the present application. Figure 2 In the exemplary multi-zone DC distribution network, each zone DC distribution network is connected to a port converter of a four-port energy router.

[0054] In an alternative embodiment, Figure 3 The figure shows the electrical structure and control system schematic diagram of the corresponding four-port energy router. Each DC distribution network in each substation is connected to a port converter. The port converter converts DC power into high-frequency AC power, and transmits the electric energy to other substation distribution network interfaces through a coupling transformer. The corresponding port converter then rectifies the high-frequency AC power into DC power for the substation distribution network where the DC power is input.

[0055] In an optional embodiment, the coordination controller can realize coordinated control by having multiple different components built in, for example, an adaptive droop controller and a multi-agent droop coefficient generator. The adaptive droop controller is responsible for coordinating the output power of the port converters to ensure that the output proportion of different port converters reaches a predetermined ratio, while the multi-agent droop coefficient generator adaptively generates the droop coefficient of the droop controller when the output proportion of the port converter reaches a predetermined ratio.

[0056] In an optional embodiment, the coordination controller can also exchange real-time data with each port converter through a built-in communication module to ensure rapid response and execution of the coordinated control strategy. The communication module can use wired or wireless communication technology, such as Ethernet, Wi-Fi, Bluetooth or a dedicated industrial communication protocol to ensure the stability and real-time performance of data transmission.

[0057] In an optional embodiment, the coordination controller can also dynamically adjust the control strategy according to the grid operation status and external environment changes. For example, during the peak load period of the grid, the coordination controller can give priority to power output to meet the power supply demand of the grid; and during the low load period of the grid, it can give priority to energy storage to improve energy utilization efficiency.

[0058] In an optional embodiment, the coordination controller may further include an intelligent decision-making module, which can predict the future operation trend of the power grid based on the power grid operation data and historical operation experience, and formulate corresponding control strategies accordingly. The intelligent decision-making module may use machine learning algorithms, such as neural networks, support vector machines, or decision trees, to improve the accuracy of prediction and the adaptability of control strategies.

[0059] In an embodiment of the present application, the coordination controller includes an adaptive droop controller and a multi-agent droop coefficient generator;

[0060] The adaptive droop controller is used to coordinate the output power of the port converters so that different port converters reach the output proportion of the first interactive ratio;

[0061] The multi-agent droop coefficient generator adaptively generates the droop coefficient of the droop controller when the output ratio of the converters at different ports reaches the first interactive ratio. Figure 4 As shown in the figure, for each port converter, the coordination controller includes a corresponding adaptive droop controller and a multi-agent droop coefficient generator. The adaptive droop controller is used to coordinate the output power of the port converter so that different port converters can achieve a reasonable output ratio.

[0062] It should be noted that the establishment of several port energy routers based on the target DC distribution network can achieve energy mutual assistance between DC distribution networks in multiple areas and improve the stability and reliability of the entire system. Through the establishment of port energy routers, electrical isolation between DC distribution networks in different areas can be achieved, thereby ensuring the independent operation safety of each area. At the same time, the port controller of the port converter can accurately control the voltage, ensure the stable output of the voltage, and provide a guarantee for the efficient operation of the DC distribution network.

[0063] S102, presetting a first judgment logic, and judging an operating mode of the target DC distribution network according to the first judgment logic, where the operating modes include a first operating mode, a second operating mode, and a third operating mode;

[0064] In the embodiment of the present application, a first judgment logic is preset, and judging the working mode of the target DC distribution network according to the first judgment logic includes:

[0065] Performing the first judgment logic on any target DC distribution network;

[0066] Obtaining a number of DC distribution networks in different areas as target DC distribution networks;

[0067] Establish several energy routers with the same number of ports according to the number of substations.

[0068] In an optional embodiment, the first judgment logic includes any judgment logic for judging the specific situation of the energy inside the distribution network, for example, judging whether there is redundancy in the energy inside the distribution network, whether there is load redundancy, whether the power is balanced, whether energy storage is required, etc. Through these judgments, the current working state of the DC distribution network can be determined, so as to select a suitable working mode.

[0069] In an optional embodiment, the working mode of the target DC distribution network may include a coordinated mutual assistance mode, a station area voltage stabilization mode, a blocking mode or a fault recovery mode, etc. Each working mode corresponds to a different control strategy and operation process to adapt to different grid operation requirements and conditions.

[0070] In the embodiment of the present application, three working modes are selected for logical judgment, thereby achieving flexible control and efficient operation of the target DC distribution network.

[0071] Specifically, the first working mode is the coordination and mutual assistance mode, the second working mode is the area voltage stabilization mode, and the third working mode is the locking mode.

[0072] In an optional embodiment, when there is internal energy redundancy, the port converter corresponding to the distribution network of the substation area that can supply energy to the outside will be set to work in a coordinated mutual assistance mode;

[0073] In an optional embodiment, when there is internal load redundancy, the port converter corresponding to the distribution network in the substation that needs to absorb energy from the energy router will be set to work in the substation voltage stabilization mode;

[0074] In an optional embodiment, when power balance can be achieved internally, the converter at the port of the distribution network of the substation area that does not use the energy router to interact with other distribution networks of the substation area will be set to work in the blocking mode;

[0075] In an optional embodiment, in the coordinated mutual assistance mode, the port converter realizes reasonable output power distribution through the coordinated controller and the port controller.

[0076] In an optional embodiment, in the area voltage stabilization mode, the port converter is controlled by the port controller to achieve voltage stabilization in the corresponding area;

[0077] In an optional embodiment, in the blocking mode, the port converter is in a blocking state, and there is no energy interaction between the corresponding distribution network of the substation and other distribution networks of the substation;

[0078] It should be noted that in the present application, the energy router port converter operates according to the instructions of the distribution network energy management center, and the working mode of any port converter is independently determined by the coordination controller according to the instructions of the distribution network energy management center.

[0079] It should be noted that the first judgment logic is preset, and the working mode of the target DC distribution network can be flexibly switched according to the real-time grid conditions according to the first judgment logic, thereby optimizing the operating efficiency and stability of the entire DC distribution network. By reasonably allocating the working modes of the converters at each port, it can be ensured that under different working conditions, the DC distribution network can respond to grid load changes in the most appropriate manner, achieving efficient energy utilization and stable operation of the grid.

[0080] S103, setting a first interaction ratio of a plurality of port energy routers according to the working mode, and performing coordinated control according to the first interaction ratio.

[0081] In an embodiment of the present application, a first interaction ratio of a plurality of port energy routers is set according to a working mode, and coordinated control according to the first interaction ratio includes:

[0082] Preset the first ratio acquisition logic;

[0083] The first ratio acquisition logic is used to acquire the corresponding first interaction ratio for the first working mode, the second working mode and the third working mode.

[0084] In an optional embodiment, the first ratio acquisition logic can dynamically adjust the first interaction ratio by analyzing the real-time data and historical operation data of the power grid, combined with the current load situation of the power grid and the predicted future load trend. For example, when the load of the power grid is high, the first interaction ratio can be appropriately increased to increase energy mutual assistance and ensure the stable power supply of the power grid; when the load is low, the first interaction ratio can be reduced to reduce energy mutual assistance to save energy.

[0085] In the embodiment of the present application, it is achieved by setting up a coordination controller. The underlying logic of the coordination controller design is a preset first ratio acquisition logic. Different working modes have different first interaction ratios. The coordination controller dynamically adjusts the output power of each port converter according to the first interaction ratio to meet the energy requirements under different working modes.

[0086] In the embodiment of the present application, the coordination controller will reasonably allocate the output power of each port converter according to the first interaction ratio in the coordination mutual assistance mode to achieve effective mutual assistance of energy. For example, when there is energy redundancy in the DC distribution network of a certain area, the coordination controller will increase the output power of the port converter of the area to support other areas that need energy.

[0087] In the embodiment of the present application, in the area voltage stabilization mode, the coordination controller will adjust the output power of the port converter according to the first interaction ratio to maintain the voltage stability of the corresponding area. At this time, the coordination controller will give priority to the demand for voltage stability to ensure the normal operation of the area DC distribution network.

[0088] In the embodiment of the present application, in the locking mode, the coordination controller sets the port converter to the locking state, at which time the port converter does not participate in the exchange of energy to ensure the independent operation safety of the DC distribution network in the substation area.

[0089] It should be noted that by setting the first interaction ratio for coordinated control, it can be ensured that in different working modes, the DC distribution network can flexibly adjust the distribution and exchange of energy according to the real-time grid status and predicted future load trends, thereby improving the operating efficiency and stability of the entire DC distribution network.

[0090] In the embodiment of the present application, the setting of the first interaction ratio is a key link in coordinated control, which directly affects the output power distribution of the port converter and the operating efficiency of the entire DC distribution network. By reasonably setting the first interaction ratio, it can be ensured that in different working modes, each port converter can flexibly adjust the output power according to the actual needs of the power grid to achieve effective distribution and utilization of energy.

[0091] In summary, the present invention proposes a method for coordinated control of energy mutual assistance of multi-station DC distribution networks, establishes a plurality of port energy routers based on a target DC distribution network; presets a first judgment logic, and judges the working mode of the target DC distribution network according to the first judgment logic, and the working mode includes a first working mode, a second working mode and a third working mode; sets a first interaction ratio of a plurality of port energy routers according to the working mode, and performs coordinated control according to the first interaction ratio. Based on the use of an isolated multi-port energy router to connect multiple station DC distribution networks, the present application sets the working mode of the energy router port converter connected to each station distribution network to a coordinated mutual assistance, station voltage stabilization or locking mode, respectively for the energy outward supply, energy absorption and independent operation conditions of each station distribution network. Adaptive droop control is adopted for the port converter in the coordinated mutual assistance mode to realize adaptive adjustment of the droop coefficient, and further coordinates the balanced output of the port converter in the mutual assistance mode to achieve the goal of power balance and voltage stability of the multi-station DC distribution network.

[0092] Example 2

[0093] In a preferred embodiment, Figure 4 The figure shows a schematic diagram of the coordination controller principle of a four-port isolated energy router established in accordance with an embodiment of the present application. In the figure, for each port converter, the coordination controller includes a corresponding adaptive droop controller and a multi-agent droop coefficient generator. The adaptive droop controller is used to coordinate the output power of the port converter so that different port converters can achieve a reasonable output ratio, and is implemented using the following control algorithm:

[0094]

[0095] in, represents the voltage reference signal of the corresponding port controller generated by the adaptive droop controller for the i-th port converter included in the coordination controller, Indicates the rated voltage of the primary side of the AC transformer inside the energy router, I i (t) represents the output current measurement value of the converter at the i-th port, c i It represents the droop coefficient of the i-th droop controller contained in the coordinated controller, and its value is generated by the multi-agent droop coefficient generator.

[0096] The multi-agent droop coefficient generator uses a multi-agent consensus algorithm to adaptively generate the droop coefficient of the droop controller when the output ratio of converters at different ports reaches a reasonable level. The algorithm used is as follows:

[0097]

[0098] in, represents the droop coefficient c of the adaptive droop controller of the i-th port converter i The correction amount, Denotes the droop coefficient c of the adaptive droop controller i The initial value of , N is the number of port converters in the multi-port energy router that can transmit power outward, b is the control parameter used to adjust the system convergence speed, P i * and P j * They represent the reference value of the power balance that can be used for external transmission in the distribution network of the i-th and j-th substations, V i (t) and V j (t) represents the output voltage measurement value of the converter at the i-th and j-th ports, respectively;

[0099] When the multi-port energy router system reaches a steady state, the output ratio of the power transmitted outward by the port converter corresponding to the substation with redundant power generation is P i / P i * The droop coefficient c of the adaptive droop controller is obtained. i The correction amount The droop coefficient is updated, and an adaptive droop controller is further used to achieve uniform output of converters at the substation port with redundant power.

[0100] Example 3

[0101] In this embodiment, a multi-zone DC distribution network energy mutual assistance coordinated control system is provided, including:

[0102] A model building module, used to build several port energy routers based on the target DC distribution network;

[0103] A judgment module, used to preset a first judgment logic, and judge the working mode of the target DC distribution network according to the first judgment logic, where the working modes include a first working mode, a second working mode and a third working mode;

[0104] The control module is used to set a first interaction ratio of a plurality of port energy routers according to a working mode, and perform coordinated control according to the first interaction ratio.

[0105] It should be noted that the technical solution of the system for energy mutual assistance and coordinated control of DC distribution networks in multiple substations and the technical solution of the above-mentioned method for energy mutual assistance and coordinated control of DC distribution networks in multiple substations belong to the same concept. For the details not described in detail in the technical solution of the system for energy mutual assistance and coordinated control of DC distribution networks in multiple substations in this embodiment, please refer to the description of the technical solution of the above-mentioned method for energy mutual assistance and coordinated control of DC distribution networks in multiple substations.

[0106] The above-mentioned unit modules may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to the above-mentioned modules.

[0107] This embodiment also provides an electronic device, which includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, 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 an 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 the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for coordinated control of energy mutual assistance of a DC distribution network in multiple areas is implemented. The display screen of the computer device 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 covered on the display screen, or a button, trackball or touchpad set on the housing of the computer device, or an external keyboard, touchpad or mouse.

[0108] This embodiment also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method proposed in the above embodiment is implemented.

[0109] The storage medium proposed in this embodiment and the method proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0110] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ReadOnly, Memory, ROM), random access memory (RandomAccess Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.

[0111] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0112] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0113] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0114] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0115] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1The steps for the functions specified in one or more boxes.

[0116] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0117] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for coordinated control of energy mutual assistance in a multi-station DC distribution network, characterized in that: include: Establishing several port energy routers based on the target DC distribution network; A first judgment logic is preset, and an operating mode of the target DC distribution network is judged according to the first judgment logic, where the operating mode includes a first operating mode, a second operating mode, and a third operating mode; A first interaction ratio of a plurality of port energy routers is set according to the working mode, and coordinated control is performed according to the first interaction ratio.

2. The method for coordinated control of energy mutual assistance of DC distribution networks in multiple substations according to claim 1, characterized in that: The step of setting a first interaction ratio of a plurality of port energy routers according to the working mode and performing coordinated control according to the first interaction ratio comprises: Preset the first ratio acquisition logic; The first ratio acquisition logic is used to acquire the corresponding first interaction ratio for the first working mode, the second working mode and the third working mode.

3. The method for coordinated control of energy mutual assistance of DC distribution networks in multiple substations according to claim 2, characterized in that: The preset first judgment logic, judging the working mode of the target DC distribution network according to the first judgment logic includes: Performing a first logical judgment on any target DC distribution network; Obtaining a number of DC distribution networks in different areas as target DC distribution networks; Establish several energy routers with the same number of ports according to the number of substations.

4. The method for coordinated control of energy mutual assistance of DC distribution networks in multiple substations according to claim 3, characterized in that: The step of establishing a plurality of port energy routers based on a target DC distribution network includes: Each port of the energy routers having several ports is connected to a DC distribution network in an area through a port converter, and a transformer isolation type architecture is adopted between the ports to electrically isolate the DC distribution networks in the areas.

5. The method for coordinated control of energy mutual assistance of DC distribution networks in multiple substations according to claim 4, characterized in that: The step of establishing a plurality of port energy routers based on the target DC distribution network further includes: Each port converter of the plurality of port energy routers is configured with a corresponding port controller to perform port voltage control.

6. The method for coordinated control of energy mutual assistance of DC distribution networks in multiple substations according to claim 5, characterized in that: The step of establishing a plurality of port energy routers based on a target DC power distribution network further includes: configuring a coordination controller for the plurality of port energy routers.

7. The method for coordinated control of energy mutual assistance of DC distribution networks in multiple substations according to claim 6, characterized in that: The coordinated controller includes an adaptive droop controller and a multi-agent droop coefficient generator; The adaptive droop controller is used to coordinate the output power of the port converters so that different port converters reach an output ratio of a first interactive ratio; The multi-agent droop coefficient generator adaptively generates the droop coefficient of the droop controller when the output proportion of converters at different ports reaches a first interaction ratio.

8. A system using the method for coordinated control of energy mutual assistance of a multi-zone DC distribution network as claimed in any one of claims 1 to 7, characterized in that: include: A model building module, used to build several port energy routers based on the target DC distribution network; A judgment module, configured to preset a first judgment logic, and judge an operating mode of a target DC distribution network according to the first judgment logic, wherein the operating mode includes a first operating mode, a second operating mode and a third operating mode; The control module is used to set a first interaction ratio of a plurality of port energy routers according to the working mode, and perform coordinated control according to the first interaction ratio.

9. An electronic device, comprising: Memory and processor; The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the multi-station DC distribution network energy mutual assistance and coordinated control method described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the method for energy mutual assistance and coordinated control of a multi-station DC distribution network as claimed in any one of claims 1 to 7.

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