Control method and device of power distribution network, storage medium and electronic equipment

Abstract

The invention discloses a control method and device of a power distribution network, a storage medium and electronic equipment, and relates to the technical field of medium and low voltage flexible interconnection. The method comprises the following steps: connecting a plurality of power distribution networks through a flexible interconnection system, and detecting whether a plurality of feeder lines of the plurality of power distribution networks operate normally or not; if the multiple feeder lines of the multiple power distribution networks operate normally, an intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, an interconnection switch in the flexible interconnection system is controlled to be in an open-loop state, and the multiple power distribution networks are controlled to operate through the intelligent soft switch; and if the target feeder lines of the plurality of power distribution networks operate abnormally, controlling an intelligent soft switch and an interconnection switch in the flexible interconnection system to operate in parallel, controlling a first port of the intelligent soft switch to be in a locked state, and controlling the plurality of power distribution networks to operate. According to the invention, the problem that the stable operation of the power distribution network is difficult to guarantee because the effect of controlling the operation of the power distribution network through a flexible interconnection system is poor in the related technology is solved.

Description

Technical Field

[0001] The present application relates to the technical field of medium and low voltage flexible interconnection, and in particular to a control method and device for a distribution network, a storage medium and an electronic device. Background Art

[0002] At present, the existing distribution network is facing the customization and diversification of electricity demand. In the face of the disorder of high penetration ratio of distributed energy, distributed energy storage and electric vehicles, higher requirements are put forward for the means of ensuring the power quality and power supply reliability of medium and low voltage intelligent distribution networks. These problems are difficult to solve effectively with conventional switches, and the new energy distribution network in related technologies is generally controlled by a medium voltage flexible interconnection system, but the flexible interconnection system in related technologies is difficult to automatically control the operation of the distribution network system, and when the flexible interconnection system in related technologies is used to control the operation of the distribution network, human intervention is required. Therefore, it is difficult to ensure the safe and stable operation of the new energy distribution network using the flexible interconnection system in related technologies.

[0003] Currently, no effective solution has been proposed to address the problem that the effect of controlling the operation of the distribution network through the flexible interconnection system in related technologies is poor, and thus it is difficult to ensure the stable operation of the distribution network. Summary of the invention

[0004] The main purpose of the present application is to provide a control method and device for a distribution network, a storage medium and an electronic device, so as to solve the problem in the related art that the effect of controlling the operation of the distribution network through a flexible interconnection system is poor, and thus it is difficult to ensure the stable operation of the distribution network.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a control method for a distribution network is provided. The method includes: connecting multiple distribution networks through a flexible interconnection system, and detecting whether multiple feeders of the multiple distribution networks are operating normally, wherein the flexible interconnection system includes at least an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel; if the multiple feeders of the multiple distribution networks are operating normally, the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the tie switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the multiple distribution networks is controlled by the intelligent soft switch in the flexible interconnection system; if the target feeders of the multiple distribution networks are operating abnormally, the intelligent soft switch and the tie switch in the flexible interconnection system are controlled to operate in parallel, the first port of the intelligent soft switch in the flexible interconnection system is controlled to be in a locked state, and the operation of the multiple distribution networks is controlled, wherein the first port is a port having a connection relationship with the target feeder.

[0006] Furthermore, controlling the operation of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system includes: judging whether the voltage values ​​of multiple lines of the multiple distribution networks are not greater than a preset voltage value, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include the multiple feeders; if the voltage values ​​of the multiple lines of the multiple distribution networks are not greater than the preset voltage value, controlling the operation of the multiple distribution networks; if the voltage value of at least one line of the multiple distribution networks is greater than the preset voltage value, adjusting the voltage value of the at least one line through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks.

[0007] Furthermore, controlling the operation of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system includes: judging whether the frequencies of the multiple lines of the multiple distribution networks are not greater than a preset frequency, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include the multiple feeders; if the frequencies of the multiple lines of the multiple distribution networks are not greater than the preset frequency, controlling the operation of the multiple distribution networks; if the frequency of at least one line of the multiple distribution networks is greater than the preset frequency, adjusting the frequency of the at least one line through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks.

[0008] Further, controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of the multiple distribution networks includes: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and prohibiting the first port of the intelligent soft switch from providing reactive power and active power to the target feeder; transferring the active power output by the first port of the intelligent soft switch to the second port of the intelligent soft switch, and controlling the operation of feeders other than the target feeder in the multiple distribution networks to control the operation of the multiple distribution networks, wherein the second port is a port other than the first port in the intelligent soft switch.

[0009] Further, controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of the multiple distribution networks includes: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and judging whether the tie switch in the flexible interconnection system is in a closed state; if the tie switch in the flexible interconnection system is in an open state, prohibiting the operation of the multiple distribution networks; if any tie switch in the flexible interconnection system is in a closed state, controlling the first port of the intelligent soft switch in the flexible interconnection system to exit the locked state, and switching the state of the intelligent soft switch in the flexible interconnection system to an operating state; adjusting the voltage values ​​and frequencies of multiple lines of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include the multiple feeders.

[0010] Furthermore, after adjusting the voltage values ​​and frequencies of multiple lines of the multiple distribution networks through the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks, the method also includes: when the target feeders of the multiple distribution networks are restored to a normal operating state, obtaining the current value of the connecting switch in the flexible interconnection system; according to the current value of the connecting switch in the flexible interconnection system, controlling the transformers in the multiple distribution networks to supply power to the target feeders, and controlling the intelligent soft switches in the flexible interconnection system to be in an operating state; adjusting the voltage values ​​and frequencies of multiple lines of the multiple distribution networks through the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks.

[0011] Further, according to the current value of the tie switch in the flexible interconnection system, controlling the transformers in the multiple distribution networks to supply power to the target feeder includes: judging whether the current value of the tie switch in the flexible interconnection system is less than a preset threshold; if the current value of the tie switch in the flexible interconnection system is not less than the preset threshold, adjusting the current value of the tie switch in the flexible interconnection system; if the current value of the tie switch in the flexible interconnection system is less than the preset threshold, controlling the tie switch in the flexible interconnection system to be disconnected, and controlling the transformers in the multiple distribution networks to supply power to the target feeder.

[0012] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a control device for a distribution network is provided. The device includes: a first detection unit, which is used to connect multiple distribution networks through a flexible interconnection system, and detect whether multiple feeders of the multiple distribution networks are operating normally, wherein the flexible interconnection system at least includes an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel; a first control unit, which is used to control the intelligent soft switch in the flexible interconnection system to be in a closed-loop operation state if the multiple feeders of the multiple distribution networks are operating normally, control the tie switch in the flexible interconnection system to be in an open-loop state, and control the operation of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system; a second control unit, which is used to control the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel if the target feeder of the multiple distribution networks is operating abnormally, control the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and control the operation of the multiple distribution networks, wherein the first port is a port having a connection relationship with the target feeder.

[0013] Further, the first control unit includes: a first judgment module, used to judge whether the voltage values ​​of the multiple lines of the multiple distribution networks are not greater than the preset voltage value, wherein the multiple lines are the lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include the multiple feeders; a first control module, used to control the operation of the multiple distribution networks if the voltage values ​​of the multiple lines of the multiple distribution networks are not greater than the preset voltage value; a first processing module, used to adjust the voltage value of the at least one line through the intelligent soft switch in the flexible interconnection system and control the operation of the multiple distribution networks if the voltage value of at least one line of the multiple distribution networks is greater than the preset voltage value.

[0014] Further, the first control unit includes: a second judgment module, used to judge whether the frequencies of the multiple lines of the multiple distribution networks are not greater than a preset frequency, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include the multiple feeders; a second control module, used to control the operation of the multiple distribution networks if the frequencies of the multiple lines of the multiple distribution networks are not greater than the preset frequency; and a second processing module, used to adjust the frequency of the at least one line through the intelligent soft switch in the flexible interconnection system and control the operation of the multiple distribution networks if the frequency of at least one line of the multiple distribution networks is greater than the preset frequency.

[0015] Furthermore, the second control unit includes: a third processing module, used to control the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, control the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and prohibit the first port of the intelligent soft switch from providing reactive power and active power to the target feeder; a fourth processing module, used to transfer the active power output by the first port of the intelligent soft switch to the second port of the intelligent soft switch, and control the operation of feeders other than the target feeder in the multiple distribution networks to control the operation of the multiple distribution networks, wherein the second port is other ports in the intelligent soft switch except the first port.

[0016] Further, the second control unit includes: a fifth processing module, which is used to control the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, control the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and judge whether the tie switch in the flexible interconnection system is in a closed state; a sixth processing module, which is used to prohibit the operation of the multiple distribution networks if the tie switch in the flexible interconnection system is in an open state; a seventh processing module, which is used to control the first port of the intelligent soft switch in the flexible interconnection system to exit the locked state if any tie switch in the flexible interconnection system is in a closed state, and switch the state of the intelligent soft switch in the flexible interconnection system to an operating state; an eighth processing module, which is used to adjust the voltage value and frequency of multiple lines of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system to control the operation of the multiple distribution networks, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include the multiple feeders.

[0017] Furthermore, the device also includes: a first acquisition unit, used to obtain the current value of the connecting switch in the flexible interconnection system when the target feeder of the multiple distribution networks is restored to a normal operating state after adjusting the voltage values ​​and frequencies of the multiple lines of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system to control the operation of the multiple distribution networks; a third control unit, used to control the transformers in the multiple distribution networks to supply power to the target feeder according to the current value of the connecting switch in the flexible interconnection system, and control the intelligent soft switch in the flexible interconnection system to be in an operating state; a first processing unit, used to adjust the voltage values ​​and frequencies of the multiple lines of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system to control the operation of the multiple distribution networks.

[0018] Further, the third control unit includes: a third judgment module, used to judge whether the current value of the tie switch in the flexible interconnection system is less than a preset threshold; a first adjustment module, used to adjust the current value of the tie switch in the flexible interconnection system if the current value of the tie switch in the flexible interconnection system is not less than the preset threshold; a third control module, used to control the tie switch in the flexible interconnection system to disconnect if the current value of the tie switch in the flexible interconnection system is less than the preset threshold, and control the transformers in the multiple distribution networks to supply power to the target feeder.

[0019] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium stores a program, wherein the program executes any one of the above-mentioned methods for controlling a power distribution network.

[0020] In order to achieve the above-mentioned purpose, according to another aspect of the present application, an electronic device is provided, which includes one or more processors and a memory, and the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the above-mentioned distribution network control methods.

[0021] Through the present application, the following steps are adopted: multiple distribution networks are connected through a flexible interconnection system, and multiple feeders of the multiple distribution networks are detected whether they are operating normally, wherein the flexible interconnection system includes at least an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel; if the multiple feeders of the multiple distribution networks are operating normally, the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the tie switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the multiple distribution networks is controlled through the intelligent soft switch in the flexible interconnection system; if the target feeders of the multiple distribution networks are operating abnormally, the intelligent soft switch and the tie switch in the flexible interconnection system are controlled to operate in parallel, the first port of the intelligent soft switch in the flexible interconnection system is controlled to be in a locked state, and the operation of the multiple distribution networks is controlled, wherein the first port is a port having a connection relationship with the target feeder, which solves the problem in the related art that the effect of controlling the operation of the distribution network through the flexible interconnection system is poor, and it is difficult to ensure the stable operation of the distribution network. When it is detected that the feeder of the distribution network is operating normally, the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the interconnection switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the distribution network is controlled through the intelligent soft switch in the flexible interconnection system; when it is detected that the feeder of the distribution network is operating abnormally, the intelligent soft switch and the interconnection switch in the flexible interconnection system are controlled to operate in parallel, the port of the intelligent soft switch in the flexible interconnection system connected to the faulty feeder is controlled to be in a locked state, and the operation of multiple distribution networks is controlled, thereby realizing the coordinated cooperation of small-power intelligent soft switches and parallel interconnection switches, so that the flexible interconnection system automatically controls the operation of the distribution network system, while reducing human intervention operations, thereby achieving the effect of ensuring the safe and stable operation of the new energy distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 The process of the control method of the distribution network provided in the embodiment of the present application is Figure 1 ;

[0024] Figure 2 is a schematic diagram of a tie switch and an intelligent soft switch in the flexible interconnection system in this embodiment;

[0025] Figure 3 The process of the control method of the distribution network provided in the embodiment of the present application is Figure 2 ;

[0026] Figure 4 is a schematic diagram of a control device for a distribution network provided according to an embodiment of the present application;

[0027] Figure 5 is a schematic diagram of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] It should be noted that the relevant information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for display, data for analysis, etc.) involved in this disclosure are all information and data authorized by the user or fully authorized by all parties. For example, an interface is set between this system and the relevant user or organization. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain relevant information after receiving the consent information fed back by the aforementioned user or organization.

[0032] The present invention is described below in conjunction with preferred implementation steps. Figure 1 The process of the control method of the distribution network provided in the embodiment of the present application is Figure 1 ,like Figure 1 As shown, the method comprises the following steps:

[0033] Step S101, multiple distribution networks are connected through a flexible interconnection system, and multiple feeders of the multiple distribution networks are detected to see whether they are operating normally, wherein the flexible interconnection system includes at least an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel.

[0034] For example, the medium and low voltage flexible interconnection system (corresponding to the above-mentioned flexible interconnection system) can use an intelligent soft switch and a connecting switch in parallel to connect two or more medium and low voltage distribution networks (corresponding to the above-mentioned distribution network) to realize the "closed-loop design and closed-loop operation" of the medium and low voltage intelligent distribution network, and the intelligent soft switch includes at least 3 power AC / DC power electronic converter ports (AC-DC ports) and 1 power DC / DC power electronic converter port (DC-DC port). Moreover, the working mode of the intelligent soft switch can include: intelligent switch soft connection operation mode, fault isolation and connecting switch parallel operation mode and flow transfer operation mode. For example, after the medium and low voltage flexible interconnection system (corresponding to the above-mentioned flexible interconnection system) uses an intelligent soft switch and a connecting switch in parallel to connect two or more medium and low voltage distribution networks (corresponding to the above-mentioned distribution network), that is, after the intelligent soft switch and the connecting switch are operated in parallel and coordinated, it can detect whether the feeder of the distribution network is operating normally.

[0035] Step S102: If the multiple feeders of the multiple distribution networks operate normally, the intelligent soft switches in the flexible interconnection system are controlled to be in a closed-loop operation state, the tie switches in the flexible interconnection system are controlled to be in an open-loop state, and the operation of the multiple distribution networks is controlled through the intelligent soft switches in the flexible interconnection system.

[0036] For example, when the medium and low voltage intelligent distribution network (corresponding to the above-mentioned distribution network) is operating normally, that is, when all feeders of the medium and low voltage intelligent distribution network (corresponding to the above-mentioned distribution network) are operating normally, the feeders are powered by the transformers and distributed power sources of the lines where they are located, and the intelligent switches operate in a soft closed loop, responsible for regulating the voltage and power flow, and the AC interconnection switch is in an open loop state.

[0037] Step S103: if the target feeders of multiple distribution networks operate abnormally, the intelligent soft switch and the tie switch in the flexible interconnection system are controlled to operate in parallel, the first port of the intelligent soft switch in the flexible interconnection system is controlled to be in a locked state, and the operation of multiple distribution networks is controlled, wherein the first port is a port having a connection relationship with the target feeder.

[0038] For example, when feeder 1 (corresponding to the target feeder mentioned above) fails, the intelligent soft switch switches to the fault isolation and tie switch parallel operation mode, and the intelligent soft switch port 1 (corresponding to the first port mentioned above) is temporarily blocked to control the operation of the distribution network. The temporary blocking means that the intelligent soft switch port 1 (corresponding to the first port mentioned above) is in a blocked state for a preset period of time.

[0039] Through the above steps S101 to S103, when it is detected that the feeder of the distribution network is operating normally, the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the connecting switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the distribution network is controlled by the intelligent soft switch in the flexible interconnection system; when it is detected that the feeder of the distribution network is operating abnormally, the intelligent soft switch and the connecting switch in the flexible interconnection system are controlled to operate in parallel, the port of the intelligent soft switch in the flexible interconnection system connected to the faulty feeder is controlled to be in a locked state, and the operation of multiple distribution networks is controlled, thereby realizing the coordinated cooperation of the small-power intelligent soft switch and the parallel connecting switch, so that the flexible interconnection system automatically controls the operation of the distribution network system, and reduces human intervention operations, thereby achieving the effect of ensuring the safe and stable operation of the new energy distribution network.

[0040] Optionally, in the control method of the distribution network provided in the embodiment of the present application, controlling the operation of multiple distribution networks through an intelligent soft switch in a flexible interconnection system includes: determining whether the voltage values ​​of multiple lines of the multiple distribution networks are not greater than a preset voltage value, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders; if the voltage values ​​of the multiple lines of the multiple distribution networks are not greater than the preset voltage value, controlling the operation of the multiple distribution networks; if the voltage value of at least one line of the multiple distribution networks is greater than the preset voltage value, adjusting the voltage value of at least one line through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks.

[0041] For example, when the medium and low voltage intelligent distribution network (corresponding to the above-mentioned distribution network) is operating normally, that is, when all feeders of the medium and low voltage intelligent distribution network (corresponding to the above-mentioned distribution network) are operating normally, the intelligent switch soft closed loop operates, responsible for adjusting the voltage and power flow (frequency), and the AC interconnection switch is in an open loop state; when the AC port detects that the voltage amplitude of the connected line exceeds the limit and exceeds the set threshold (corresponding to the above-mentioned preset voltage value), the intelligent soft switch provides reactive power support through the AC port to reduce voltage fluctuations; when the reactive power provided by the AC port of the intelligent soft switch has reached the limit value, and the voltage is still far beyond the limit, the control mode of the intelligent soft switch is switched to reactive power priority mode, reducing the active power regulation capability to maintain voltage stability. If the maximum reactive power output voltage is still far beyond the limit, an alarm is uploaded, and the upper-level controller adjusts the distributed power supply and distributed energy storage to maintain system voltage stability.

[0042] In summary, the voltage can be adjusted quickly and accurately by using intelligent soft switches in a flexible interconnection system.

[0043] Optionally, in the control method of the distribution network provided in the embodiment of the present application, controlling the operation of multiple distribution networks through an intelligent soft switch in a flexible interconnection system includes: determining whether the frequencies of multiple lines of the multiple distribution networks are not greater than a preset frequency, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders; if the frequencies of the multiple lines of the multiple distribution networks are not greater than the preset frequency, controlling the operation of the multiple distribution networks; if the frequency of at least one line of the multiple distribution networks is greater than the preset frequency, adjusting the frequency of at least one line through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks.

[0044] For example, when the medium and low voltage intelligent distribution network (corresponding to the above-mentioned distribution network) is operating normally, that is, when all feeders of the medium and low voltage intelligent distribution network (corresponding to the above-mentioned distribution network) are operating normally, the intelligent switch soft closed loop operates, responsible for adjusting the voltage and power flow, and the AC interconnection switch is in an open loop state; when the AC port detects that the frequency of the connected line exceeds the limit and exceeds the threshold (corresponding to the above-mentioned preset frequency), the intelligent soft switch port detects the active support capability of the other port, and provides active support with the minimum line loss as the constraint to reduce frequency fluctuations; when the frequency deviation of the AC system still exceeds the limit and exceeds the set threshold (corresponding to the above-mentioned preset frequency) under the minimum line constraint of the intelligent soft switch, active support is provided with frequency stability as the constraint to reduce frequency fluctuations; when the frequency exceeds the limit more under the maximum active support provided by the intelligent soft switch, the intelligent soft switch switches to the active priority support mode, reduces the reactive power regulation capability, and maintains frequency stability. If the maximum active output frequency still exceeds the limit more, an alarm is uploaded, and the upper-level controller adjusts the distributed power supply and distributed energy storage to maintain frequency stability.

[0045] In summary, frequency information can be adjusted quickly and accurately by using intelligent soft switches in a flexible interconnection system.

[0046] Optionally, in the control method of the distribution network provided in the embodiment of the present application, the intelligent soft switch and the connecting switch in the flexible interconnection system are controlled to operate in parallel, the first port of the intelligent soft switch in the flexible interconnection system is controlled to be in a locked state, and the operation of multiple distribution networks is controlled, including: controlling the intelligent soft switch and the connecting switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and prohibiting the first port of the intelligent soft switch from providing reactive power and active power to the target feeder; transferring the active power output by the first port of the intelligent soft switch to the second port of the intelligent soft switch, and controlling the operation of feeders other than the target feeder in multiple distribution networks to control the operation of multiple distribution networks, wherein the second port is a port other than the first port in the intelligent soft switch.

[0047] For example, when feeder 1 (corresponding to the above-mentioned target feeder) fails, the intelligent soft switch switches to the fault isolation and tie switch parallel operation mode, the intelligent soft switch port 1 (corresponding to the above-mentioned first port) is temporarily locked, and no reactive and active output is provided to feeder 1 (corresponding to the above-mentioned target feeder). At the same time, the active power output through port 1 (corresponding to the above-mentioned first port) is transferred to port 2, port 3 or DC port (corresponding to the above-mentioned second port) of the intelligent soft switch, and the operation of feeders other than feeder 1 (corresponding to the above-mentioned target feeder) in the distribution network is controlled.

[0048] Through the above scheme, the operation of the power grid system can be conveniently controlled by adopting the method of power transfer between ports.

[0049] Optionally, in the control method of the distribution network provided in the embodiment of the present application, controlling the intelligent soft switch and the tie switch in the flexible interconnected system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnected system to be in a locked state, and controlling the operation of multiple distribution networks includes: controlling the intelligent soft switch and the tie switch in the flexible interconnected system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnected system to be in a locked state, and judging whether the tie switch in the flexible interconnected system is in a closed state; if the tie switch in the flexible interconnected system is in an open state, prohibiting the operation of multiple distribution networks; if any tie switch in the flexible interconnected system is in a closed state, controlling the first port of the intelligent soft switch in the flexible interconnected system to exit the locked state, and switching the state of the intelligent soft switch in the flexible interconnected system to an operating state; adjusting the voltage values ​​and frequencies of multiple lines of multiple distribution networks through the intelligent soft switch in the flexible interconnected system, and controlling the operation of multiple distribution networks, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnected system, and the multiple lines include multiple feeders.

[0050] For example, when feeder 1 (corresponding to the target feeder mentioned above) fails, the intelligent soft switch switches to the fault isolation and interconnection switch parallel operation mode, the intelligent soft switch port 1 (corresponding to the first port mentioned above) is temporarily locked, and it is determined whether the interconnection switch is in the closed state; if the interconnection switch is not in the closed state (i.e., in the disconnected state), the normal operation of the distribution network system can be prohibited; if any interconnection switch in the flexible interconnection system is in the closed state, the intelligent soft switch exits the temporary lockout and switches to the soft connection operation mode, responsible for the flow (frequency) and voltage regulation.

[0051] Through the above scheme, the normal operation of the intelligent soft switch in the flexible interconnection system can be conveniently controlled according to the closing state of the tie switch.

[0052] Optionally, in the control method of the distribution network provided in the embodiment of the present application, after adjusting the voltage values ​​and frequencies of multiple lines of multiple distribution networks through the intelligent soft switches in the flexible interconnected system to control the operation of multiple distribution networks, the method also includes: when the target feeders of the multiple distribution networks are restored to a normal operating state, obtaining the current value of the interconnecting switch in the flexible interconnected system; according to the current value of the interconnecting switch in the flexible interconnected system, controlling the transformers in the multiple distribution networks to supply power to the target feeders, and controlling the intelligent soft switches in the flexible interconnected system to be in an operating state; adjusting the voltage values ​​and frequencies of multiple lines of the multiple distribution networks through the intelligent soft switches in the flexible interconnected system to control the operation of the multiple distribution networks.

[0053] For example, when the fault point of feeder 1 (corresponding to the above-mentioned target feeder) is cleared and the feeder 1 (corresponding to the above-mentioned target feeder) is switched to be powered by the line transformer, the transformer in the distribution network is controlled to supply power to feeder 1 (corresponding to the above-mentioned target feeder) according to the current value of the AC interconnection switch, and the intelligent soft switch in the flexible interconnection system is controlled to be in the soft connection operation mode; the power flow (frequency) and voltage are adjusted by the intelligent soft switch in the flexible interconnection system to control the operation of the distribution network.

[0054] Through the above scheme, the operation of the distribution network system can be quickly and accurately controlled according to the current of the AC tie switch.

[0055] Optionally, in the control method of the distribution network provided in the embodiment of the present application, according to the current value of the connecting switch in the flexible interconnected system, controlling the transformers in multiple distribution networks to supply power to the target feeder includes: judging whether the current value of the connecting switch in the flexible interconnected system is less than a preset threshold; if the current value of the connecting switch in the flexible interconnected system is not less than the preset threshold, adjusting the current value of the connecting switch in the flexible interconnected system; if the current value of the connecting switch in the flexible interconnected system is less than the preset threshold, controlling the connecting switch in the flexible interconnected system to be disconnected, and controlling the transformers in multiple distribution networks to supply power to the target feeder.

[0056] For example, if the current value of the AC interconnecting switch is not less than the threshold value (corresponding to the above-mentioned preset threshold value), the current of the AC interconnecting switch can continue to be adjusted; if the current value of the AC interconnecting switch is less than the threshold value (corresponding to the above-mentioned preset threshold value), that is, when the current of the interconnecting switch is reduced to within the threshold value (corresponding to the above-mentioned preset threshold value), the feeder power supply can be restored by the line transformer, and the intelligent soft switch is switched to the soft connection operation mode, which is responsible for adjusting the power flow (frequency) and voltage of feeder 1 (corresponding to the above-mentioned target feeder).

[0057] Through the above solution, the transformer can be quickly and accurately restored to supply power to the feeder.

[0058] For example, Figure 2is a schematic diagram of a tie switch and an intelligent soft switch in the flexible interconnection system in this embodiment, as shown in Figure 2 As shown, the tie switches and the intelligent soft switches in the flexible interconnection system are connected in parallel, and the intelligent soft switch has AC port 1, AC port 2, AC port 3 and DC port 1. And the tie switches in the flexible interconnection system are AC tie switch 1, AC tie switch 2 and AC tie switch 3. In addition, Figure 2 Feeder 1, feeder 2 and feeder 3 in the figure may be feeders of a distribution network.

[0059] For example, this embodiment provides a coordinated control method for a medium voltage interconnection system in which an intelligent soft switch and a tie switch are connected in parallel, including a converter control system, and Figure 3 The process of the control method of the distribution network provided in the embodiment of the present application is Figure 2 ,like Figure 3 As shown, the specific steps of the control method are as follows:

[0060] Step 1: The medium and low voltage flexible interconnection system uses intelligent soft switches and tie switches in parallel to connect two or more medium and low voltage distribution networks to achieve "closed-loop design and closed-loop operation" of medium and low voltage intelligent distribution networks. The intelligent soft switch contains at least 3 power AC / DC power electronic converter ports and 1 power DC / DC power electronic converter port;

[0061] Step 2: The intelligent soft switch working mode includes: intelligent switch soft connection operation mode, fault isolation and tie switch parallel operation mode, and power flow transfer operation mode;

[0062] Step 3: When the medium and low voltage intelligent distribution network is operating normally, the feeder is powered by the transformer and distributed power supply of the line where it is located, and the intelligent switch operates in a soft closed loop, responsible for regulating the voltage and power flow (frequency), and the AC tie switch is in an open loop state;

[0063] Step 4: When the AC port (e.g., AC port 1) detects that the voltage amplitude of the connected line exceeds the set threshold, the intelligent soft switch provides reactive power support through the AC port to reduce voltage fluctuations;

[0064] Step 5: When the reactive power provided by the AC port of the intelligent soft switch (for example, AC port 1) has reached the limit value, and the voltage is still far beyond the limit, the control mode of the intelligent soft switch is switched to the reactive power priority mode, reducing the active power regulation capability to maintain voltage stability. If the maximum reactive power output voltage is still far beyond the limit, an alarm is uploaded, and the upper-layer controller adjusts the distributed power supply and distributed energy storage to maintain system voltage stability.

[0065] Step 6: When the AC port (for example, AC port 1) detects that the frequency of the connected line exceeds the threshold, the intelligent soft switch port detects the active power support capability of other ports (AC port 2, AC port 3, DC port), and provides active power support based on the minimum line loss (for example, the DC port has a small line loss, so the DC port provides active power first, and so on), thereby reducing frequency fluctuations.

[0066] Step 7: When the frequency deviation of the AC system still exceeds the set threshold under the minimum line constraint of the intelligent soft switch, active power support is provided to reduce frequency fluctuations with frequency stability as the constraint;

[0067] Step 8: When the frequency exceeds the limit by a large amount while the intelligent soft switch provides the maximum active power support, the intelligent soft switch switches to the active power priority support mode, reduces the reactive power regulation capability, and maintains the frequency stability. If the maximum active power output frequency exceeds the limit by a large amount, an alarm is uploaded, and the upper-layer controller adjusts the distributed power supply and distributed energy storage to maintain the frequency stability.

[0068] Step 9: When feeder 1 fails, the intelligent soft switch switches to the fault isolation and tie switch parallel operation mode, and port 1 of the intelligent soft switch is temporarily blocked, and does not provide reactive and active output to feeder 1. At the same time, the active power output through port 1 is transferred to port 2, port 3 or DC port of the intelligent soft switch to maintain the active power balance between feeder 2 and feeder 3 and reduce fluctuations;

[0069] Step 10: If the power transfer is limited (for example, port 2 and the DC port can only accept 1MW of active power, but port 3 needs to transfer 2MW of active power to the outside), an alarm is sent to the upper-level controller to reduce the active power of the distributed generation and distributed energy storage to maintain feeder stability;

[0070] Step 11: If both port 2 and port 3 output active power to port 1 before the fault, an alarm is sent to the upper-level controller to reduce the active power of the distributed generation and distributed energy storage to maintain feeder stability;

[0071] Step 12: After the fault point of feeder 1 is isolated (the intelligent soft switch detects the AC protection signal), the intelligent soft switch exits the temporary lockout and establishes the AC voltage of feeder 1;

[0072] Step 13: quickly close the tie switch based on the principle of minimum line loss (for example, tie switch 1 has the minimum line loss). When the tie switch is closed, the AC port tracks the feeder voltage, frequency, and phase angle to achieve synchronous closing;

[0073] Step 14: If the tie switch 1 does not detect the tie switch closing position within the time threshold, the tie switch 3 is closed to provide power to the feeder 1. If either the tie switch 1 or the tie switch 3 is closed successfully, the intelligent soft switch switches to the soft connection operation mode and is responsible for power flow and voltage regulation. The intelligent soft switch is responsible for regulating the power flow and voltage of the feeder 1, and the above steps 3 to 10 are repeated.

[0074] Step 15: After the fault point of feeder 1 is cleared, feeder 1 is switched to be powered by the line transformer, and the intelligent soft switch switches to the power flow transfer operation mode to reduce the current of the AC tie switch to below the threshold. When the power flow transferred by port 1 has reached the maximum value and the tie switch current is still large, port 1 withdraws from the reactive power support capability and provides the maximum active power transfer capability.

[0075] Step 16: When the current of the tie switch is still large in the maximum active operation mode of port 1, an alarm is sent to the upper layer controller, and the upper layer controller reduces the active output of the distributed power source and distributed energy storage to reduce the current of the tie switch to within the threshold;

[0076] Step 17: Issue a tie switch opening command. After detecting that the tie switch is in the opening state, the line transformer restores the feeder power supply, and the intelligent soft switch switches to the soft connection operation mode, responsible for regulating the power flow and voltage of feeder 1.

[0077] Therefore, the present embodiment realizes the coordinated cooperation between the small power intelligent soft switch and the parallel tie switch, and at the same time reduces the human intervention operation, ensuring the safe and stable operation of the new energy distribution network. Moreover, the control method in the present embodiment realizes the automatic start and stop of the medium and low voltage flexible mutual operation through the medium voltage interconnection system start and stop control method based on the bridge arm multiplexing flexible converter, reduces the human intervention operation, and ensures the safe and stable operation of the energy distribution network.

[0078] In summary, the control method of the distribution network provided in the embodiment of the present application connects multiple distribution networks through a flexible interconnection system, and detects whether multiple feeders of the multiple distribution networks are operating normally, wherein the flexible interconnection system includes at least an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel; if the multiple feeders of the multiple distribution networks are operating normally, the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the tie switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the multiple distribution networks is controlled through the intelligent soft switch in the flexible interconnection system; if the target feeders of the multiple distribution networks are operating abnormally, the intelligent soft switch and the tie switch in the flexible interconnection system are controlled to operate in parallel, the first port of the intelligent soft switch in the flexible interconnection system is controlled to be in a locked state, and the operation of the multiple distribution networks is controlled, wherein the first port is a port having a connection relationship with the target feeder, which solves the problem in the related art that the effect of controlling the operation of the distribution network through the flexible interconnection system is poor, and it is difficult to ensure the stable operation of the distribution network. When it is detected that the feeder of the distribution network is operating normally, the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the interconnection switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the distribution network is controlled through the intelligent soft switch in the flexible interconnection system; when it is detected that the feeder of the distribution network is operating abnormally, the intelligent soft switch and the interconnection switch in the flexible interconnection system are controlled to operate in parallel, the port of the intelligent soft switch in the flexible interconnection system connected to the faulty feeder is controlled to be in a locked state, and the operation of multiple distribution networks is controlled, thereby realizing the coordinated cooperation of small-power intelligent soft switches and parallel interconnection switches, so that the flexible interconnection system automatically controls the operation of the distribution network system, while reducing human intervention operations, thereby achieving the effect of ensuring the safe and stable operation of the new energy distribution network.

[0079] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0080] The present application also provides a control device for a distribution network. It should be noted that the control device for a distribution network in the present application can be used to execute the control method for a distribution network provided in the present application. The following introduces the control device for a distribution network provided in the present application.

[0081] Figure 4 Schematic diagram of a control device for a distribution network provided according to an embodiment of the present application. Figure 4 As shown, the device includes: a first detection unit 401, a first control unit 402 and a second control unit 403.

[0082] Specifically, the first detection unit 401 is used to connect multiple distribution networks through a flexible interconnection system, and detect whether multiple feeders of the multiple distribution networks are operating normally, wherein the flexible interconnection system at least includes an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel;

[0083] The first control unit 402 is used to control the intelligent soft switch in the flexible interconnection system to be in a closed-loop operation state, control the tie switch in the flexible interconnection system to be in an open-loop state, and control the operation of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system if the multiple feeders of the multiple distribution networks operate normally;

[0084] The second control unit 403 is used to control the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel if the target feeders of the multiple distribution networks operate abnormally, control the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and control the operation of the multiple distribution networks, wherein the first port is a port having a connection relationship with the target feeder.

[0085] In summary, the control device of the distribution network provided in the embodiment of the present application connects multiple distribution networks through a flexible interconnection system through a first detection unit 401, and detects whether multiple feeders of the multiple distribution networks are operating normally, wherein the flexible interconnection system includes at least an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel; if the multiple feeders of the multiple distribution networks are operating normally, the first control unit 402 controls the intelligent soft switch in the flexible interconnection system to be in a closed-loop operation state, controls the tie switch in the flexible interconnection system to be in an open-loop state, and controls the operation of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system; if the target feeders of the multiple distribution networks are operating abnormally, the second control unit 403 controls the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controls the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controls the operation of the multiple distribution networks, wherein the first port is a port having a connection relationship with the target feeder, which solves the problem that the effect of controlling the operation of the distribution network through the flexible interconnection system in the related art is poor, and it is difficult to ensure the stable operation of the distribution network. When it is detected that the feeder of the distribution network is operating normally, the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the interconnection switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the distribution network is controlled through the intelligent soft switch in the flexible interconnection system; when it is detected that the feeder of the distribution network is operating abnormally, the intelligent soft switch and the interconnection switch in the flexible interconnection system are controlled to operate in parallel, the port of the intelligent soft switch in the flexible interconnection system connected to the faulty feeder is controlled to be in a locked state, and the operation of multiple distribution networks is controlled, thereby realizing the coordinated cooperation of small-power intelligent soft switches and parallel interconnection switches, so that the flexible interconnection system automatically controls the operation of the distribution network system, while reducing human intervention operations, thereby achieving the effect of ensuring the safe and stable operation of the new energy distribution network.

[0086] Optionally, in the control device of the distribution network provided in the embodiment of the present application, the first control unit includes: a first judgment module, used to judge whether the voltage values ​​of multiple lines of multiple distribution networks are not greater than a preset voltage value, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders; a first control module, used to control the operation of the multiple distribution networks if the voltage values ​​of the multiple lines of the multiple distribution networks are not greater than the preset voltage value; a first processing module, used to adjust the voltage value of at least one line through the intelligent soft switch in the flexible interconnection system and control the operation of the multiple distribution networks if the voltage value of at least one line of the multiple distribution networks is greater than the preset voltage value.

[0087] Optionally, in the control device of the distribution network provided in the embodiment of the present application, the first control unit includes: a second judgment module, used to judge whether the frequency of multiple lines of multiple distribution networks is not greater than a preset frequency, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders; a second control module, used to control the operation of the multiple distribution networks if the frequency of the multiple lines of the multiple distribution networks is not greater than the preset frequency; a second processing module, used to adjust the frequency of at least one line through the intelligent soft switch in the flexible interconnection system and control the operation of the multiple distribution networks if the frequency of at least one line of the multiple distribution networks is greater than the preset frequency.

[0088] Optionally, in the control device of the distribution network provided in the embodiment of the present application, the second control unit includes: a third processing module, used to control the intelligent soft switch and the connecting switch in the flexible interconnection system to operate in parallel, control the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and prohibit the first port of the intelligent soft switch from providing reactive power and active power to the target feeder; a fourth processing module, used to transfer the active power output by the first port of the intelligent soft switch to the second port of the intelligent soft switch, and control the operation of feeders other than the target feeder in multiple distribution networks to control the operation of multiple distribution networks, wherein the second port is a port other than the first port in the intelligent soft switch.

[0089] Optionally, in the control device of the distribution network provided in the embodiment of the present application, the second control unit includes: a fifth processing module, which is used to control the intelligent soft switch and the connecting switch in the flexible interconnection system to operate in parallel, control the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and determine whether the connecting switch in the flexible interconnection system is in a closed state; a sixth processing module, which is used to prohibit the operation of multiple distribution networks if the connecting switch in the flexible interconnection system is in a disconnected state; a seventh processing module, which is used to control the first port of the intelligent soft switch in the flexible interconnection system to exit the locked state if any connecting switch in the flexible interconnection system is in a closed state, and switch the state of the intelligent soft switch in the flexible interconnection system to an operating state; an eighth processing module, which is used to adjust the voltage value and frequency of multiple lines of multiple distribution networks through the intelligent soft switch in the flexible interconnection system, and control the operation of multiple distribution networks, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders.

[0090] Optionally, in the control device of the distribution network provided in the embodiment of the present application, the device also includes: a first acquisition unit, used to adjust the voltage values ​​and frequencies of multiple lines of multiple distribution networks through the intelligent soft switches in the flexible interconnected system to control the operation of multiple distribution networks, and when the target feeders of the multiple distribution networks are restored to a normal operating state, obtain the current value of the interconnecting switch in the flexible interconnected system; a third control unit, used to control the transformers in the multiple distribution networks to supply power to the target feeders according to the current value of the interconnecting switch in the flexible interconnected system, and control the intelligent soft switches in the flexible interconnected system to be in an operating state; a first processing unit, used to adjust the voltage values ​​and frequencies of multiple lines of multiple distribution networks through the intelligent soft switches in the flexible interconnected system to control the operation of multiple distribution networks.

[0091] Optionally, in the control device of the distribution network provided in the embodiment of the present application, the third control unit includes: a third judgment module, used to judge whether the current value of the connecting switch in the flexible interconnection system is less than a preset threshold; a first adjustment module, used to adjust the current value of the connecting switch in the flexible interconnection system if the current value of the connecting switch in the flexible interconnection system is not less than the preset threshold; a third control module, used to control the connecting switch in the flexible interconnection system to disconnect if the current value of the connecting switch in the flexible interconnection system is less than the preset threshold, and control the transformers in multiple distribution networks to supply power to the target feeder.

[0092] The control device of the distribution network includes a processor and a memory. The above-mentioned first detection unit 401, first control unit 402 and second control unit 403 are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0093] The processor contains a kernel, which calls the corresponding program unit from the memory. One or more kernels can be set, and the kernel parameters can be adjusted to ensure the safe and stable operation of the new energy distribution network.

[0094] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0095] An embodiment of the present invention provides a computer-readable storage medium on which a program is stored. When the program is executed by a processor, the control method of the power distribution network is implemented.

[0096] An embodiment of the present invention provides a processor, which is used to run a program, wherein the control method of the power distribution network is executed when the program is run.

[0097] like Figure 5As shown, an embodiment of the present invention provides an electronic device, the device includes a processor, a memory, and a program stored in the memory and executable on the processor, and the processor implements the following steps when executing the program: multiple distribution networks are connected through a flexible interconnection system, and multiple feeders of the multiple distribution networks are detected whether they are operating normally, wherein the flexible interconnection system at least includes an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel; if multiple feeders of the multiple distribution networks are operating normally, the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the tie switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the multiple distribution networks is controlled through the intelligent soft switch in the flexible interconnection system; if the target feeders of the multiple distribution networks are operating abnormally, the intelligent soft switch and the tie switch in the flexible interconnection system are controlled to operate in parallel, the first port of the intelligent soft switch in the flexible interconnection system is controlled to be in a locked state, and the operation of the multiple distribution networks is controlled, wherein the first port is a port having a connection relationship with the target feeder.

[0098] When the processor executes the program, the following steps are also implemented: controlling the operation of multiple distribution networks through the intelligent soft switch in the flexible interconnection system includes: judging whether the voltage values ​​of multiple lines of the multiple distribution networks are not greater than the preset voltage value, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders; if the voltage values ​​of the multiple lines of the multiple distribution networks are not greater than the preset voltage value, controlling the operation of the multiple distribution networks; if the voltage value of at least one line of the multiple distribution networks is greater than the preset voltage value, adjusting the voltage value of at least one line through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks.

[0099] When the processor executes the program, the following steps are also implemented: controlling the operation of multiple distribution networks through the intelligent soft switch in the flexible interconnection system includes: judging whether the frequencies of multiple lines of the multiple distribution networks are not greater than the preset frequency, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders; if the frequencies of the multiple lines of the multiple distribution networks are not greater than the preset frequency, controlling the operation of the multiple distribution networks; if the frequency of at least one line of the multiple distribution networks is greater than the preset frequency, adjusting the frequency of at least one line through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks.

[0100] When the processor executes the program, the following steps are also implemented: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of multiple distribution networks, including: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and prohibiting the first port of the intelligent soft switch from providing reactive power and active power to the target feeder; transferring the active power output by the first port of the intelligent soft switch to the second port of the intelligent soft switch, and controlling the operation of feeders other than the target feeder in multiple distribution networks to control the operation of multiple distribution networks, wherein the second port is other ports in the intelligent soft switch except the first port.

[0101] When the processor executes the program, the following steps are also implemented: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of multiple distribution networks, including: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and judging whether the tie switch in the flexible interconnection system is in a closed state; if the tie switch in the flexible interconnection system is in an open state, prohibiting the operation of multiple distribution networks; if any tie switch in the flexible interconnection system is in a closed state, controlling the first port of the intelligent soft switch in the flexible interconnection system to exit the locked state, and switching the state of the intelligent soft switch in the flexible interconnection system to an operating state; adjusting the voltage values ​​and frequencies of multiple lines of multiple distribution networks through the intelligent soft switch in the flexible interconnection system, and controlling the operation of multiple distribution networks, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders.

[0102] When the processor executes the program, the following steps are also implemented: after adjusting the voltage values ​​and frequencies of multiple lines of multiple distribution networks through the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks, it also includes: when the target feeders of the multiple distribution networks are restored to a normal operating state, obtaining the current value of the interconnection switch in the flexible interconnection system; according to the current value of the interconnection switch in the flexible interconnection system, controlling the transformers in the multiple distribution networks to supply power to the target feeders, and controlling the intelligent soft switches in the flexible interconnection system to be in an operating state; adjusting the voltage values ​​and frequencies of multiple lines of the multiple distribution networks through the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks.

[0103] When the processor executes the program, the following steps are also implemented: according to the current value of the tie switch in the flexible interconnection system, controlling the transformers in multiple distribution networks to supply power to the target feeder includes: judging whether the current value of the tie switch in the flexible interconnection system is less than a preset threshold; if the current value of the tie switch in the flexible interconnection system is not less than the preset threshold, adjusting the current value of the tie switch in the flexible interconnection system; if the current value of the tie switch in the flexible interconnection system is less than the preset threshold, controlling the tie switch in the flexible interconnection system to be disconnected, and controlling the transformers in the multiple distribution networks to supply power to the target feeder.

[0104] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0105] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that is initialized with the following method steps: connecting multiple distribution networks through a flexible interconnection system, and detecting whether multiple feeders of the multiple distribution networks are operating normally, wherein the flexible interconnection system at least includes an intelligent soft switch and a connecting switch, and the intelligent soft switch and the connecting switch in the flexible interconnection system are connected in parallel; if multiple feeders of the multiple distribution networks are operating normally, then the intelligent soft switch in the flexible interconnection system is controlled to be in a closed-loop operation state, the connecting switch in the flexible interconnection system is controlled to be in an open-loop state, and the operation of the multiple distribution networks is controlled through the intelligent soft switch in the flexible interconnection system; if the target feeders of the multiple distribution networks are operating abnormally, then the intelligent soft switch and the connecting switch in the flexible interconnection system are controlled to operate in parallel, the first port of the intelligent soft switch in the flexible interconnection system is controlled to be in a locked state, and the operation of the multiple distribution networks is controlled, wherein the first port is a port that has a connection relationship with the target feeder.

[0106] When executed on a data processing device, it is also suitable for executing a program initialized with the following method steps: controlling the operation of multiple distribution networks through an intelligent soft switch in a flexible interconnection system includes: judging whether the voltage values ​​of multiple lines of the multiple distribution networks are not greater than a preset voltage value, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders; if the voltage values ​​of the multiple lines of the multiple distribution networks are not greater than the preset voltage value, controlling the operation of the multiple distribution networks; if the voltage value of at least one line of the multiple distribution networks is greater than the preset voltage value, adjusting the voltage value of at least one line through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks.

[0107] When executed on a data processing device, it is also suitable for executing a program initialized with the following method steps: controlling the operation of multiple distribution networks through an intelligent soft switch in a flexible interconnection system includes: judging whether the frequencies of multiple lines of multiple distribution networks are not greater than a preset frequency, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders; if the frequencies of multiple lines of the multiple distribution networks are not greater than the preset frequency, controlling the operation of the multiple distribution networks; if the frequency of at least one line of the multiple distribution networks is greater than the preset frequency, adjusting the frequency of at least one line through the intelligent soft switch in the flexible interconnection system, and controlling the operation of the multiple distribution networks.

[0108] When executed on a data processing device, it is also suitable for executing a program that is initialized with the following method steps: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of multiple distribution networks, including: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and prohibiting the first port of the intelligent soft switch from providing reactive power and active power to the target feeder; transferring the active power output by the first port of the intelligent soft switch to the second port of the intelligent soft switch, and controlling the operation of feeders other than the target feeder in multiple distribution networks to control the operation of multiple distribution networks, wherein the second port is other ports in the intelligent soft switch except the first port.

[0109] When executed on a data processing device, it is also suitable for executing a program that is initialized with the following method steps: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of multiple distribution networks includes: controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and judging whether the tie switch in the flexible interconnection system is in a closed state; if the tie switch in the flexible interconnection system is in an open state, prohibiting the operation of multiple distribution networks; if any tie switch in the flexible interconnection system is in a closed state, controlling the first port of the intelligent soft switch in the flexible interconnection system to exit the locked state, and switching the state of the intelligent soft switch in the flexible interconnection system to an operating state; adjusting the voltage values ​​and frequencies of multiple lines of multiple distribution networks through the intelligent soft switch in the flexible interconnection system, and controlling the operation of multiple distribution networks, wherein the multiple lines are lines connected to the ports of the intelligent soft switch in the flexible interconnection system, and the multiple lines include multiple feeders.

[0110] When executed on a data processing device, it is also suitable for executing a program that is initialized with the following method steps: after adjusting the voltage values ​​and frequencies of multiple lines of multiple distribution networks through the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks, it also includes: when the target feeders of the multiple distribution networks are restored to a normal operating state, obtaining the current value of the interconnection switch in the flexible interconnection system; according to the current value of the interconnection switch in the flexible interconnection system, controlling the transformers in the multiple distribution networks to supply power to the target feeders, and controlling the intelligent soft switches in the flexible interconnection system to be in an operating state; adjusting the voltage values ​​and frequencies of multiple lines of the multiple distribution networks through the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks.

[0111] When executed on a data processing device, it is also suitable for executing a program that is initialized with the following method steps: according to the current value of the tie switch in the flexible interconnection system, controlling the transformers in multiple distribution networks to supply power to the target feeder includes: judging whether the current value of the tie switch in the flexible interconnection system is less than a preset threshold; if the current value of the tie switch in the flexible interconnection system is not less than the preset threshold, adjusting the current value of the tie switch in the flexible interconnection system; if the current value of the tie switch in the flexible interconnection system is less than the preset threshold, controlling the tie switch in the flexible interconnection system to be disconnected, and controlling the transformers in the multiple distribution networks to supply power to the target feeder.

[0112] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[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 comprising 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 1 A step that specifies a function in one or more boxes.

[0116] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0117] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0118] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0119] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0120] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may 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.

[0121] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A control method for a distribution network, characterized in that: include: Connecting multiple distribution networks through a flexible interconnection system, and detecting whether multiple feeders of the multiple distribution networks are operating normally, wherein the flexible interconnection system at least includes an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel; If the multiple feeders of the multiple distribution networks operate normally, the intelligent soft switches in the flexible interconnection system are controlled to be in a closed-loop operation state, the tie switches in the flexible interconnection system are controlled to be in an open-loop state, and the operation of the multiple distribution networks is controlled through the intelligent soft switches in the flexible interconnection system; If the target feeders of the multiple distribution networks operate abnormally, the intelligent soft switch and the tie switch in the flexible interconnection system are controlled to operate in parallel, the first port of the intelligent soft switch in the flexible interconnection system is controlled to be in a locked state, and the operation of the multiple distribution networks is controlled, wherein the first port is a port connected to the target feeder.

2. The method according to claim 1, characterized in that: Controlling the operation of the plurality of distribution networks by the intelligent soft switch in the flexible interconnection system includes: Determining whether voltage values ​​of multiple lines of the multiple distribution networks are not greater than a preset voltage value, wherein the multiple lines are lines connected to ports of intelligent soft switches in the flexible interconnection system, and the multiple lines include the multiple feeders; If the voltage values ​​of the multiple lines of the multiple distribution networks are not greater than the preset voltage value, controlling the multiple distribution networks to operate; If the voltage value of at least one line of the multiple distribution networks is greater than the preset voltage value, the voltage value of the at least one line is adjusted by the intelligent soft switch in the flexible interconnection system, and the operation of the multiple distribution networks is controlled.

3. The method according to claim 1, characterized in that Controlling the operation of the plurality of distribution networks by the intelligent soft switch in the flexible interconnection system includes: Determining whether the frequencies of the multiple lines of the multiple distribution networks are not greater than a preset frequency, wherein the multiple lines are lines connected to the ports of the intelligent soft switches in the flexible interconnection system, and the multiple lines include the multiple feeders; If the frequencies of the multiple lines of the multiple power distribution networks are not greater than the preset frequency, controlling the multiple power distribution networks to operate; If the frequency of at least one line of the multiple distribution networks is greater than the preset frequency, the frequency of the at least one line is adjusted by the intelligent soft switch in the flexible interconnection system, and the operation of the multiple distribution networks is controlled.

4. The method according to claim 1, characterized in that: Controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of the multiple distribution networks includes: Controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and prohibiting the first port of the intelligent soft switch from providing reactive power and active power to the target feeder; The active power output from the first port of the intelligent soft switch is transferred to the second port of the intelligent soft switch, and the feeders other than the target feeders in the multiple distribution networks are controlled to control the operation of the multiple distribution networks, wherein the second port is a port other than the first port in the intelligent soft switch.

5. The method according to claim 1, characterized in that Controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of the multiple distribution networks includes: Controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and determining whether the tie switch in the flexible interconnection system is in a closed state; If the tie switch in the flexible interconnection system is in an open state, the operation of the multiple distribution networks is prohibited; If any tie switch in the flexible interconnection system is in a closed state, controlling the first port of the intelligent soft switch in the flexible interconnection system to exit the locked state, and switching the state of the intelligent soft switch in the flexible interconnection system to the running state; The voltage values ​​and frequencies of the multiple lines of the multiple distribution networks are adjusted by the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks, wherein the multiple lines are the lines connected to the ports of the intelligent soft switches in the flexible interconnection system, and the multiple lines include the multiple feeders.

6. The method according to claim 5, characterized in that After adjusting the voltage values ​​and frequencies of the multiple lines of the multiple distribution networks by the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks, the method further includes: When the target feeders of the plurality of distribution networks are restored to a normal operating state, obtaining a current value of a tie switch in the flexible interconnection system; According to the current value of the tie switch in the flexible interconnection system, control the transformers in the multiple distribution networks to supply power to the target feeder, and control the intelligent soft switch in the flexible interconnection system to be in an operating state; The voltage values ​​and frequencies of the multiple lines of the multiple distribution networks are adjusted by the intelligent soft switches in the flexible interconnection system to control the operation of the multiple distribution networks.

7. The method according to claim 6, characterized in that According to the current value of the tie switch in the flexible interconnection system, controlling the transformers in the plurality of distribution networks to supply power to the target feeder includes: Determining whether the current value of the tie switch in the flexible interconnection system is less than a preset threshold; If the current value of the tie switch in the flexible interconnection system is not less than the preset threshold, adjusting the current value of the tie switch in the flexible interconnection system; If the current value of the tie switch in the flexible interconnection system is less than the preset threshold, the tie switch in the flexible interconnection system is controlled to be disconnected, and the transformers in the multiple distribution networks are controlled to supply power to the target feeder.

8. A control device for a distribution network, characterized in that: include: A first detection unit is used to connect multiple distribution networks through a flexible interconnection system and detect whether multiple feeders of the multiple distribution networks are operating normally, wherein the flexible interconnection system at least includes an intelligent soft switch and a tie switch, and the intelligent soft switch and the tie switch in the flexible interconnection system are connected in parallel; A first control unit is configured to control the intelligent soft switch in the flexible interconnection system to be in a closed-loop operation state, control the tie switch in the flexible interconnection system to be in an open-loop state, and control the operation of the multiple distribution networks through the intelligent soft switch in the flexible interconnection system if the multiple feeders of the multiple distribution networks operate normally; a second control unit, for controlling the intelligent soft switch and the tie switch in the flexible interconnection system to operate in parallel if the target feeders of the multiple distribution networks operate abnormally, controlling the first port of the intelligent soft switch in the flexible interconnection system to be in a locked state, and controlling the operation of the multiple distribution networks, wherein the first port is a port connected to the target feeder.

9. A computer-readable storage medium, characterized in that: The storage medium stores a program, wherein the program executes the control method of the power distribution network according to any one of claims 1 to 7.

10. An electronic device, characterized in that: It includes one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the control method of the distribution network described in any one of claims 1 to 7.

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