Direct-current power distribution network control method and device, electronic equipment and storage medium

Abstract

A direct current power distribution network control method and device, electronic equipment and storage medium are disclosed in the embodiments of the present application. The method comprises: determining a current direct current power distribution region from a pre-divided direct current power distribution region of an interconnected direct current power distribution network; determining a current feeder control error of the current direct current power distribution region; the current feeder control error reflects the difference between the measured operating state of the current direct current power distribution region and the target operating state after global optimization; and according to the current feeder control error, the output power of the distributed power between the current direct current power distribution region and other direct current power distribution regions in the pre-divided direct current power distribution region is coordinated and controlled. The application solves the problem that the interconnected power of the interconnected direct current power distribution network cannot be optimized and controlled, and realizes power coordination and interconnection between each region in the direct current power distribution network.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power system distribution network control, and in particular to a DC distribution network control method and device, an electronic device, and a storage medium. BACKGROUND

[0002] There are various voltage level distribution buses, various forms of distributed power sources and loads in the DC distribution network. The distribution buses of different voltage levels need to be converted by power converters, and various distributed power sources and loads also need to be connected to the DC bus through different power converters. The operation states of various power sources and converters are different under different operation modes of the DC distribution network.

[0003] In order to ensure the normal operation of the DC distribution network, a voltage-active droop control mode can be used for power control. For the voltage-active droop control which belongs to a distributed control mode, the amount of information required is relatively small, but only the DC bus voltage and the active power of the distributed power source are considered in the control, and the active power on the tie line in the interconnected DC distribution network is not optimized and controlled, which makes it difficult for the DC distribution network to maintain an economic operation state and causes energy waste. SUMMARY

[0004] The DC distribution network control method and device, the electronic device, and the storage medium provided in the embodiments of the present application can realize the interconnection and mutual aid of power between DC distribution networks and make the DC distribution network maintain an economic operation state as much as possible.

[0005] According to an aspect of the present application, a DC distribution network control method is provided, comprising:

[0006] determining a current DC distribution area from pre-divided DC distribution areas of an interconnected DC distribution network;

[0007] determining a current feeder control error of the current DC distribution area; the current feeder control error reflects the difference between the measured operation state of the current DC distribution area and the target operation state after global optimization;

[0008] coordinating the output power of the distributed power sources between the current DC distribution area and other DC distribution areas in the pre-divided DC distribution areas according to the current feeder control error;

[0009] The interconnected DC distribution network includes a distribution network formed by interconnecting different DC circuits through tie lines, and the pre-divided DC distribution areas include at least two DC distribution areas determined by hierarchical and zonal division of the interconnected DC distribution network.

[0010] According to another aspect of the present application, a DC distribution network control device is provided, comprising:

[0011] a region determining module configured to determine a current DC power distribution region from the pre-divided DC power distribution regions of the interconnected DC power distribution network;

[0012] an error determining module configured to determine a current feeder control error of the current DC power distribution region, the current feeder control error reflecting a difference between a measured operating state of the current DC power distribution region and a globally optimized target operating state;

[0013] a control module configured to coordinate control of the output power of the distributed power supply between the current DC power distribution region and other DC power distribution regions in the pre-divided DC power distribution regions according to the current feeder control error;

[0014] The interconnected DC power distribution network comprises a power distribution network formed by interconnecting different DC circuits using tie lines, and the pre-divided DC power distribution regions comprise at least two DC power distribution regions determined by hierarchical and zonal division of the interconnected DC power distribution network.

[0015] According to another aspect of the present application, there is provided an electronic device comprising:

[0016] at least one processor; and

[0017] a memory in communication with the at least one processor; wherein

[0018] the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the DC power distribution network control method according to any one of the embodiments of the present application.

[0019] According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for enabling a processor to perform the DC power distribution network control method according to any one of the embodiments of the present application when executed by the processor.

[0020] According to the technical solution of the embodiments of the present application, the at least two pre-divided DC power distribution regions determined by hierarchical and zonal division of the interconnected DC power distribution network are used to intensively and integrally coordinate the controllable distributed energy sources in any DC power distribution region and other DC power distribution regions outside the DC power distribution region by determining the dynamic feeder control error index of the DC power distribution region, the feeder control error reflecting the difference between the measured operating state of the DC power distribution region and the globally optimized target operating state, thereby solving the problem of being unable to optimize and control the interconnected power of the interconnected DC power distribution network and realizing power coordination and intercommunication between the regions in the DC power distribution network.

[0021] It is to be understood that the details set forth herein do not limit the scope of the embodiments of the application to the specific embodiments described. Rather, the scope of the embodiments of the application is to be defined by the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0023] Figure 1 is a flow chart of a direct current power distribution network control method according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of a direct current power distribution region obtained by dividing a direct current power distribution network according to an embodiment of the present application;

[0025] Figure 3 is a flow chart of another direct current power distribution network control method according to an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of an equivalent direct current power distribution region according to an embodiment of the present application;

[0027] Figure 5 is a structural diagram of a direct current power distribution network control device according to an embodiment of the present application;

[0028] Figure 6 is a structural schematic diagram of an electronic device for implementing a direct current power distribution network control method according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the technical personnel in the art better understand the present application scheme, the following will combine the drawings in the embodiments of the present application, and the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0030] It is to be understood that the terminology "current", "other", and the like used herein is used in the sense of clarity in distinguishing between similar objects, and is not necessarily intended to denote a particular sequential or chronological order. It is to be understood that the use of such terms herein is not meant to limit the scope of the embodiments of the application described herein to only those embodiments which can be practiced in the order shown or described herein. Furthermore, the terms "comprise" and "comprising" and any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, system, product or apparatus that comprises a list of steps or units is not necessarily limited to those steps or units which are expressly listed, but can include additional steps or units not expressly listed or inherent to such process, method, product or apparatus.

[0031] The direct current power distribution network control method, device, electronic equipment and storage medium provided in the present application will be described in detail below through various embodiments and their optional schemes.

[0032] Figure 1 A flowchart of a direct current power distribution network control method is provided for the embodiments of the present application. The embodiments can be applicable to the case of optimizing and controlling the power of an interconnected direct current power distribution network. The method can be executed by a direct current power distribution network control device, which can be realized in the form of hardware and / or software. The direct current power distribution network control device can be configured in any electronic device with network communication function. As shown in the figure, the method can include the following steps: Figure 1

[0033] S110, determining a current direct current power distribution region from the pre-divided direct current power distribution regions of the interconnected direct current power distribution network.

[0034] The interconnected direct current power distribution network includes a power distribution network formed by interconnecting different direct current circuits through tie lines. The pre-divided direct current power distribution regions include at least two direct current power distribution regions determined by hierarchical and zonal division of the interconnected direct current power distribution network.

[0035] The direct current power distribution network is a new type of power network in which various power sources, loads and energy storage devices are connected and operated in direct current mode through high-power power electronic technology. A large number of distributed power sources, direct current charges and energy storage devices will be connected to the direct current power distribution network. Based on various types of direct current power distribution networks, different direct current circuits are interconnected through different tie lines to derive the interconnected direct current power distribution network.

[0036] ​Since the structure of the interconnected DC distribution network is relatively complex, a large number of distributed power sources and flexible loads are involved, and therefore the resources that need to be coordinated for the control of the DC distribution network are relatively numerous and complex, resulting in difficulty in the control of the DC distribution network. Therefore, the interconnected DC distribution network can be pre-divided into at least two pre-divided DC distribution network regions, so that each pre-divided DC distribution network region can be taken as a basic unit for the coordinated control of the DC distribution network.

[0037] Each pre-divided DC distribution network region is configured with a coordinated controller to control the distributed power sources, flexible loads, and the like in the DC distribution network region.

[0038] In an optional solution of the embodiment, a closed region formed by any two adjacent converters in the interconnected DC distribution network is configured as a pre-divided DC distribution network region.

[0039] Referring to Figure 2 , each pre-divided DC distribution network region is divided according to the following principles: if there are controllable devices in a closed region formed by a plurality of input end converters and a tie line converter in the interconnected DC distribution network, the region is pre-divided as a DC distribution network region; for example Figure 2 , the region 1 and the region 2, and the like. If there are controllable devices between a converter and the end of the interconnected DC distribution network, the region is pre-divided as a DC distribution network region, for example Figure 2 , the region 3 shown in FIG. 3, and the like.

[0040] In S120, a current feeder control error of the current DC distribution network region is determined.

[0041] The current feeder control error reflects the difference between the measured operating state and the target operating state after global optimization of the current DC distribution network region.

[0042] Since the interconnected DC distribution network is pre-divided into one or more pre-divided DC distribution network regions, the feeder control error calculated here is no longer that of the entire DC distribution network, but is calculated from a smaller granularity for the difference between the measured operating state and the target operating state after global optimization of the pre-divided DC distribution network region in the DC distribution network, to obtain the feeder control error of the corresponding DC distribution network region, so as to subsequently perform coordinated control on each refined DC distribution network region from a smaller granularity.

[0043] S130, coordinating the output power of the distributed power between the current DC power distribution area and other DC power distribution areas in the pre-divided DC power distribution area according to the current feeder control error.

[0044] The current feeder control error is used to describe the difference between the measured operating state of the current DC power distribution area and the target operating state after global optimization. Therefore, according to the difference indicated by the current feeder control error, the controllable distributed power inside the current DC power distribution area and the controllable distributed power in other DC power distribution areas in the pre-divided DC power distribution area outside the current DC power distribution area can be integrated and coordinated, so that the output power between different DC power distribution areas in the DC power distribution network can be dynamically interchanged, and the DC power distribution network can be kept in an economic operating state as much as possible.

[0045] According to the technical scheme of the embodiment of the application, at least two pre-divided DC power distribution areas of the interconnected DC power distribution network are determined by layering and zoning division, and the controllable distributed energy inside any DC power distribution area and other DC power distribution areas outside the DC power distribution area in the DC power distribution network are integrated and coordinated by determining the dynamic feeder control error index of the DC power distribution area, wherein the feeder control error reflects the difference between the measured operating state of the DC power distribution area and the target operating state after global optimization, solves the problem that the interconnected power of the interconnected DC power distribution network cannot be optimized and controlled, and realizes power coordination and interconnection between each area in the DC power distribution network.

[0046] Figure 3 A flowchart of a DC power distribution network control method provided by the embodiment of the application is provided, and the embodiment further optimizes the calculation process of the feeder control error of the DC power distribution area in the foregoing embodiment on the basis of the foregoing embodiment. The embodiment can be combined with each optional scheme in one or more of the foregoing embodiments. As shown in the figure, the method can include the following steps: Figure 3

[0047] S310, determining a current DC power distribution area from the pre-divided DC power distribution areas of the interconnected DC power distribution network.

[0048] The interconnected DC power distribution network includes a power distribution network formed by interconnecting different DC circuits by a tie line; and the pre-divided DC power distribution area includes at least two DC power distribution areas determined by layering and zoning division of the interconnected DC power distribution network.

[0049] S320, determining a current power deviation used for feeder error analysis of the current DC power distribution area.

[0050] ​The current power deviation includes an effective input power deviation flowing into the interconnected DC power distribution network and an effective output power deviation flowing out of the current DC power distribution region and other DC power distribution regions in the pre-divided DC power distribution region.

[0051] In an alternative of the embodiment, each pre-divided DC power distribution region is equivalent to a distributed power source, so as to subsequently simplify the analysis process of each DC power distribution region.

[0052] Referring to Figure 4 , each pre-divided DC power distribution region in the interconnected DC power distribution network can be equivalent to a distributed power source DG, and the equivalent schematic Figure 4 shows the equivalent process of each pre-divided DC power distribution region. Wherein, P con1 and P con2 are the power flowing into the DC power distribution network; P a1 is the output power of the equivalent DG, with positive injection into the power distribution region, three DGs are equivalent in the figure, taking region 1 as an example, the equivalent power P a1 = P a1_out -P a1_in . The quantities with asterisks in the figure are the output power targets of each equivalent DG after global optimization.

[0053] In an alternative of the embodiment, determining the current power deviation used by the current DC power distribution region for feeder error analysis can include the following steps A1-A3:

[0054] Step A1, through global optimization control of the interconnected DC power distribution network, determine the effective output power target value of the equivalent distributed power source corresponding to the pre-divided DC power distribution region in the interconnected DC power distribution network and the effective input power target value flowing into the interconnected DC power distribution network.

[0055] Referring to Figure 3 and referring to Figure 4 , for the interconnected DC power distribution network, in the global optimization control process, the predicted data of load, photovoltaic output, wind power output, etc. can be analyzed, and the state of the controllable distributed power source in each pre-divided DC power distribution region in the current time can be analyzed. According to the optimal algorithm, the global optimization control strategy of the interconnected DC power distribution network in the preset time scale from the current time is calculated, the distributed power source consumption strategy of each pre-divided DC power distribution region is generated, and the power target input to the pre-divided DC power distribution region and the power target value output from the pre-divided DC power distribution region are given. Combined with the formula P a1 = P a1_out -P a1_in , the effective output power target value of the equivalent distributed power source corresponding to the pre-divided DC power distribution region is calculated At the same time, the effective input power target value flowing into the interconnected DC power distribution network can also be obtained And etc.

[0056] Step A2, collecting the effective output power measured value of the equivalent distributed power corresponding to the pre-divided DC power distribution area in the interconnected DC power distribution network and the effective input power measured value flowing into the interconnected DC power distribution network.

[0057] Referring to Figure 4 , the effective output power measured value of the equivalent distributed power corresponding to the pre-divided DC power distribution area can be, for example Figure 4 the effective output power measured value P ai . The effective input power measured value P con1 and P con2 etc.

[0058] Step A3, determining the current power deviation used by the current DC power distribution area for feeder error analysis according to the difference between the effective output power target value and the effective output power measured value and the difference between the effective input power target value and the effective input power measured value.

[0059] S330, determining the current power adjustment coefficient used by the current DC power distribution area for feeder error analysis.

[0060] Among them, the current power adjustment coefficient includes the excess power support degree of the current DC power distribution area to other DC power distribution areas in the pre-divided DC power distribution area, the power adjustment participation coefficient of each pre-divided DC power distribution area and the power adjustment participation coefficient of the interconnected DC power distribution network.

[0061] The power adjustment participation coefficient of the pre-divided DC power distribution area is used to represent the participation degree of the current DC power distribution area in the excess power adjustment of other DC power distribution areas in the pre-divided DC power distribution area; the power adjustment participation coefficient of the interconnected DC power distribution network is used to represent the participation degree of the input converter of the interconnected DC power distribution network in the excess power adjustment of the interconnected DC power distribution network.

[0062] S340, determining the current feeder control error of the current DC power distribution area according to the current power deviation and the current power adjustment coefficient.

[0063] Among them, the current feeder control error reflects the difference between the measured operating state of the current DC power distribution area and the target operating state after global optimization.

[0064] Referring to Figure 4The interconnection control of the direct current power distribution region is based on the dynamic feeder control error index DFCE, and power coordination and interconnection between two or more pre-divided direct current power distribution regions in the interconnected direct current power distribution network are performed, and the calculation method is as follows.

[0065]

[0066] DFCE i DFCE i is the feeder control error index DFCE of the i-th direct current power distribution region, and DFCE i is the support rate of the direct current power distribution region i, and reflects the support degree of the direct current power distribution region i to the excess power of other regions. is the difference between the measured value and the target value of the equivalent region inflow active power; ΔP aj is the power deviation of the j-th equivalent region; n is the region to be adjusted by i, and does not include i. is the difference between the measured value and the target value of the converter k inflow active power of the direct current power distribution network, A j and A conk are power regulation participation coefficients, and reflect the participation degree of excess power regulation.

[0067] Optionally, for example, A j and A conk are power regulation participation coefficients, and are only 0 or 1, if A j is equal to 1, it indicates that the region i participates in the excess power regulation of the direct current power distribution region j, if A j is equal to 0, it indicates that the region i does not participate in the excess power regulation of the direct current power distribution region j. β i is the participation coefficient of the direct current power distribution region i itself, and is 0 or 1, indicating the internal autonomy of the region, and is generally 1.

[0068] S350, according to the current feeder control error, coordinating the output power of the distributed power between the current direct current power distribution region and other direct current power distribution regions in the pre-divided direct current power distribution region.

[0069] In an optional solution of the embodiment, according to the current feeder control error, coordinating the output power of the distributed power between the current direct current power distribution region and other direct current power distribution regions in the pre-divided direct current power distribution region, can include steps B1-B2:

[0070] Step B1, according to the current feeder control error, determining the distributed energy consumption capacity of the current direct current power distribution region.

[0071] Step B2, according to the distributed power consumption capacity of the current direct current power distribution area, coordinating and controlling the distributed power output power between the current direct current power distribution area and other direct current power distribution areas in the pre-divided direct current power distribution area.

[0072] If the distributed power consumption capacity does not meet the preset consumption condition, the controllable distributed power of other direct current power distribution areas in the pre-divided direct current power distribution area is coordinated and controlled to support the distributed power consumption of the current direct current power distribution area, so that the excess power of the current direct current power distribution area flows to other direct current power distribution areas in the pre-divided direct current power distribution area, and through the power interconnection between each direct current power distribution area in the interconnected direct current power distribution network, the actual operation state of the interconnected direct current power distribution network tends to approach the target optimal operation state.

[0073] If the distributed power consumption capacity does not meet the preset consumption condition, the power regulation participation coefficient and support rate in the DFCE i can be changed to change the distributed power consumption composition of the current direct current power distribution area and the support degree of each direct current power distribution area. When the internal consumption capacity of a direct current power distribution area is insufficient, the controllable distributed energy of other direct current power distribution areas in the interconnection supports it, and realizes the power interconnection and mutual aid between each direct current power distribution area in the direct current power distribution network.

[0074] By changing the power regulation participation coefficient and support rate of other direct current power distribution areas in the pre-divided direct current power distribution area, other direct current power distribution areas with external consumption capacity in the pre-divided direct current power distribution area are added to the set, so that the excess power of the current direct current power distribution area in the original set can flow into the added other direct current power distribution area, realizing the process of dynamic networking and bidirectional flow control.

[0075] According to the technical scheme of the embodiment of the application, at least two pre-divided direct current power distribution areas of the interconnected direct current power distribution network are determined by pre-dividing and partitioning the interconnected direct current power distribution network, the controllable distributed energy of other direct current power distribution areas inside and outside the direct current power distribution area in the direct current power distribution network is integrated and coordinated by determining the dynamic feeder control error index of any direct current power distribution area, the feeder control error reflects the difference between the measured operation state of the direct current power distribution area and the target operation state after global optimization, solves the problem that the interconnected power of the interconnected direct current power distribution network cannot be optimized and controlled, and realizes the power coordination and interconnection between each area in the direct current power distribution network.

[0076] Figure 5A structural block diagram of a direct current power distribution network control device is provided for an embodiment of the present application. The embodiment can be applicable to the case of optimizing and controlling power of an interconnected direct current power distribution network. The direct current power distribution network control device can be realized in the form of hardware and / or software. The direct current power distribution network control device can be configured in any electronic device with network communication function. As shown in the figure, the device can include a region determination module 510, an error determination module 520, and a control module 530. Wherein: Figure 5

[0077] The region determination module 510 is configured to determine a current direct current power distribution region from the pre-divided direct current power distribution regions of the interconnected direct current power distribution network.

[0078] The error determination module 520 is configured to determine a current feeder control error of the current direct current power distribution region. The current feeder control error reflects the difference between the measured operating state and the globally optimized target operating state of the current direct current power distribution region.

[0079] The control module 530 is configured to coordinate the output power of the distributed power source between the current direct current power distribution region and other direct current power distribution regions in the pre-divided direct current power distribution regions according to the current feeder control error.

[0080] The interconnected direct current power distribution network includes a power distribution network formed by interconnecting different direct current circuits with tie lines. The pre-divided direct current power distribution regions include at least two direct current power distribution regions determined by hierarchical and zonal division of the interconnected direct current power distribution network.

[0081] On the basis of the above embodiment, optionally, a closed region composed of any two adjacent converters in the interconnected direct current power distribution network is configured as a pre-divided direct current power distribution region. Each pre-divided direct current power distribution region is equivalent to a distributed power source.

[0082] On the basis of the above embodiment, optionally, the error determination module 520 includes:

[0083] The current power deviation used for feeder error analysis of the current direct current power distribution region is determined. The current power deviation includes effective input power deviation flowing into the interconnected direct current power distribution network and effective output power deviation flowing out of the current direct current power distribution region and other direct current power distribution regions in the pre-divided direct current power distribution regions.

[0084] The current power regulation coefficient used for feeder error analysis of the current direct current power distribution region is determined. The current power regulation coefficient includes the degree of surplus power support of the current direct current power distribution region to other direct current power distribution regions in the pre-divided direct current power distribution regions, power regulation participation coefficients of each pre-divided direct current power distribution region, and a power regulation participation coefficient of the interconnected direct current power distribution network.

[0085] ​determine a current feeder control error of the current DC power distribution area according to the current power deviation and the current power regulation coefficient.

[0086] On the basis of the above-mentioned embodiments, optionally, the power regulation participation coefficient of the pre-divided DC power distribution area is used to represent the participation degree of the current DC power distribution area in the excess power regulation of other DC power distribution areas in the pre-divided DC power distribution area; and the power regulation participation coefficient of the interconnected DC power distribution network is used to represent the participation degree of the input converter of the interconnected DC power distribution network in the excess power regulation of the interconnected DC power distribution network.

[0087] On the basis of the above-mentioned embodiments, optionally, the current power deviation used for the feeder error analysis of the current DC power distribution area is determined, including:

[0088] By the global optimization control of the interconnected DC power distribution network, the effective output power target value of the equivalent distributed power source corresponding to the pre-divided DC power distribution area in the interconnected DC power distribution network and the effective input power target value flowing into the interconnected DC power distribution network are determined;

[0089] The effective output power measured value of the equivalent distributed power source corresponding to the pre-divided DC power distribution area in the interconnected DC power distribution network and the effective input power measured value flowing into the interconnected DC power distribution network are collected;

[0090] According to the difference between the effective output power target value and the effective output power measured value and the difference between the effective input power target value and the effective input power measured value, the current power deviation used for the feeder error analysis of the current DC power distribution area is determined.

[0091] On the basis of the above-mentioned embodiments, optionally, the control module 530 includes:

[0092] According to the current feeder control error, the distributed energy consumption capacity of the current DC power distribution area is determined;

[0093] According to the distributed power consumption capacity of the current DC power distribution area, the distributed power output power between the current DC power distribution area and other DC power distribution areas in the pre-divided DC power distribution area is coordinated and controlled.

[0094] On the basis of the above-mentioned embodiments, optionally, according to the distributed power consumption capacity of the current DC power distribution area, the distributed power output power between the current DC power distribution area and other DC power distribution areas in the pre-divided DC power distribution area is coordinated and controlled, including:

[0095] If the distributed power consumption capacity does not satisfy the preset consumption condition, the controllable distributed power in other direct current power distribution regions in the pre-divided direct current power distribution region is coordinated and controlled to consume and support the distributed power in the current direct current power distribution region, so as to flow the excess power in the current direct current power distribution region to other direct current power distribution regions in the pre-divided direct current power distribution region.

[0096] The direct current power distribution network control device provided in the embodiments of the present application can execute the direct current power distribution network control method provided in any of the embodiments of the present application, has the corresponding functions and advantages of executing the direct current power distribution network control method, and the detailed process is described in the foregoing embodiments of the direct current power distribution network control method.

[0097] Figure 6 A structural schematic diagram of an electronic device 10 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular telephones, smart phones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not intended to limit the implementations of the present application described and / or claimed in this document.

[0098] As shown in Figure 6 The electronic device 10 includes at least one processor 11, and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which are communicatively connected to the at least one processor 11, wherein the memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0099] A plurality of components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, a speaker, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0100] The processor 11 can be various general and / or special purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 performs various methods and processes described above, such as the direct current power distribution network control method.

[0101] In some embodiments, the direct current power distribution network control method can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded onto the RAM 13 and executed by the processor 11, one or more steps of the direct current power distribution network control method described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform the direct current power distribution network control method by any other suitable means, such as by means of firmware.

[0102] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic device (PLD), a computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0103] Computer programs used to implement the methods of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0104] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0105] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0106] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), blockchain network, and the Internet.

[0107] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0108] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0109] The above detailed description does not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A direct current power distribution network control method, characterized by, The application relates to a method for controlling a power output of a distributed power source in an interconnected direct-current power distribution network. The method comprises the following steps: determining a current direct-current power distribution region from pre-divided direct-current power distribution regions of the interconnected direct-current power distribution network; determining a current feeder control error of the current direct-current power distribution region; the current feeder control error reflects a difference between a measured operating state of the current direct-current power distribution region and a target operating state after global optimization control; coordinately controlling the power output of the distributed power source between the current direct-current power distribution region and other direct-current power distribution regions in the pre-divided direct-current power distribution regions according to the current feeder control error; wherein the interconnected direct-current power distribution network comprises a power distribution network formed by interconnecting different direct-current circuits through tie lines; the pre-divided direct-current power distribution regions comprise at least two direct-current power distribution regions determined by hierarchical and zonal division of the interconnected direct-current power distribution network; the method further comprises the following steps: determining a current power deviation used for feeder error analysis of the current direct-current power distribution region; the current power deviation comprises an effective input power deviation flowing into the interconnected direct-current power distribution network and an effective output power deviation flowing out of the current direct-current power distribution region and other direct-current power distribution regions in the pre-divided direct-current power distribution regions; determining a current power regulation coefficient used for feeder error analysis of the current direct-current power distribution region; the current power regulation coefficient comprises a surplus power support degree of the current direct-current power distribution region to other direct-current power distribution regions in the pre-divided direct-current power distribution regions, a power regulation participation coefficient of each pre-divided direct-current power distribution region and a power regulation participation coefficient of the interconnected direct-current power distribution network; 2. The method of claim 1, wherein, determining the current feeder control error of the current direct-current power distribution region according to the current power deviation and the current power regulation coefficient.

3. The method of claim 1, wherein, Any two adjacent converters in the interconnected direct-current power distribution network form a closed region which is configured as a pre-divided direct-current power distribution region; each pre-divided direct-current power distribution region is equivalent to a distributed power source.

4. The method of claim 1, wherein, The power regulation participation coefficient of the pre-divided direct-current power distribution region is used for representing a participation degree of the current direct-current power distribution region in surplus power regulation of other direct-current power distribution regions in the pre-divided direct-current power distribution regions; the power regulation participation coefficient of the interconnected direct-current power distribution network is used for representing a participation degree of an input end converter of the interconnected direct-current power distribution network in surplus power regulation of the interconnected direct-current power distribution network. The method further comprises the following steps: determining an effective output power target value of the equivalent distributed power source corresponding to the pre-divided direct-current power distribution region in the interconnected direct-current power distribution network and an effective input power target value flowing into the interconnected direct-current power distribution network through global optimization control of the interconnected direct-current power distribution network; collecting an effective output power measured value of the equivalent distributed power source corresponding to the pre-divided direct-current power distribution region in the interconnected direct-current power distribution network and an effective input power measured value flowing into the interconnected direct-current power distribution network; determining the current power deviation used for feeder error analysis of the current direct-current power distribution region according to a difference between the effective output power target value and the effective output power measured value and a difference between the effective input power target value and the effective input power measured value.

5. The method according to any one of claims 1 to 4, characterized in that, According to the current feeder control error, the distributed power output power between the current DC power distribution area and other DC power distribution areas in the pre-divided DC power distribution area is coordinated and controlled, including: According to the current feeder control error, the distributed power consumption capacity of the current DC power distribution area is determined; According to the distributed power consumption capacity of the current DC power distribution area, the distributed power output power between the current DC power distribution area and other DC power distribution areas in the pre-divided DC power distribution area is coordinated and controlled.

6. The method of claim 5, wherein, According to the distributed power consumption capacity of the current DC power distribution area, the distributed power output power between the current DC power distribution area and other DC power distribution areas in the pre-divided DC power distribution area is coordinated and controlled, including: If the distributed power consumption capacity does not meet the preset consumption condition, the controllable distributed power of other DC power distribution areas in the pre-divided DC power distribution area is coordinated and controlled to support the distributed power consumption of the current DC power distribution area, so as to flow the excess power of the current DC power distribution area to other DC power distribution areas in the pre-divided DC power distribution area.

7. A direct current power distribution network control device, characterized by, Including: The area determination module is used to determine the current DC power distribution area from the pre-divided DC power distribution area of the interconnected DC power distribution network; The error determination module is used to determine the current feeder control error of the current DC power distribution area; The current feeder control error reflects the difference between the measured running state of the current DC power distribution area and the target running state after global optimization; The control module is used to coordinate and control the distributed power output power between the current DC power distribution area and other DC power distribution areas in the pre-divided DC power distribution area according to the current feeder control error; The interconnected DC power distribution network includes a power distribution network formed by interconnecting different DC circuits through a tie line; The pre-divided DC power distribution area includes at least two DC power distribution areas determined by layering and zoning division of the interconnected DC power distribution network; The error determination module is specifically used for: Determine the current power deviation used by the current DC power distribution area for feeder error analysis; The current power deviation includes effective input power deviation flowing into the interconnected DC power distribution network, and effective output power deviation flowing out of the current DC power distribution area and other DC power distribution areas in the pre-divided DC power distribution area; Determine the current power adjustment coefficient used by the current DC power distribution area for feeder error analysis; The current power adjustment coefficient includes the excess power support degree of the current DC power distribution area to other DC power distribution areas in the pre-divided DC power distribution area, the power adjustment participation coefficient of each pre-divided DC power distribution area, and the power adjustment participation coefficient of the interconnected DC power distribution network; According to the current power deviation and the current power adjustment coefficient, the current feeder control error of the current DC power distribution area is determined.

8. An electronic device, comprising: The electronic device includes: At least one processor; and The memory is connected in communication with the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the DC power distribution network control method in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for enabling the processor to implement the DC power distribution network control method in any one of claims 1-6 when executed.

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