Post-acceleration remote jump protection method and device of power distribution terminal, electronic equipment and medium

Abstract

The invention provides a post-acceleration remote jump protection method and device for a power distribution terminal, electronic equipment and a medium, and relates to the technical field of power system protection. The post-acceleration remote jump protection method for the power distribution terminal comprises the steps of detecting whether a post-acceleration remote jump command transmitted by an adjacent power distribution terminal is received or not under the condition that an intelligent distributed FA function of a target power distribution terminal is put into work; under the condition that the post-acceleration remote jump command is not received and the post-acceleration protection action of the target power distribution terminal is performed, judging the action reason of the post-acceleration protection action in a preset reclosing action memory period; under the condition that the post-acceleration remote jump command is received, post-acceleration remote jump protection is started according to the post-acceleration remote jump command; and determining pilot protection action information in a preset pilot protection action memory period according to the fault signals of the plurality of switches on the power distribution network line to which the target power distribution terminal belongs, so as to determine operation information for reclosing in the target power distribution terminal according to the pilot protection action information.

Description

Technical Field

[0001] The present application relates to the technical field of power system protection, for example, to a post-acceleration remote trip protection method, device, electronic equipment and medium for a distribution terminal. Background Art

[0002] The distribution network is a public infrastructure that plays an important role in ensuring power supply, supporting economic and social development, and serving to improve people's livelihood. As the core component of the distribution network, the distribution terminal is the key link to achieve reliable and efficient operation of the distribution network and rapid response to the needs of electricity users. With the development of social economy, users' requirements for the reliability of power supply of the distribution network are gradually increasing. For some important loads, stopping the power supply in a very short time will also bring serious economic losses and social impacts. Therefore, it is very important to quickly protect and self-heal the electrical information of the distribution terminal.

[0003] In the related technology, some areas use the intelligent distributed master station centralized feeder automation (FA) function, but the distribution network users have put into use both the reclosing function and the intelligent distributed FA function of the distribution terminal of the intelligent distributed FA function. However, the reclosing action time settings of the switch distribution terminals at all levels of the distribution network lines in multiple regions are inconsistent, resulting in the current protection method showing that the upstream switch at the fault point of the distribution network line is reclosed first, and then the downstream switch at the fault point is reclosed, which leads to the failure to completely isolate the fault of the distribution network line. At this time, the self-healing function of the distribution terminal configured by the connecting switch will close the connecting switch, which will cause the power supply on the other side of the connecting switch to be closed to the fault, thereby expanding the scope of power outage and greatly affecting the power supply reliability. Summary of the invention

[0004] The present application aims to provide a post-acceleration remote trip protection method, device, electronic equipment and medium for a power distribution terminal.

[0005] According to one aspect of the present application, a post-acceleration remote tripping protection method for a distribution terminal is proposed, comprising: when the intelligent distributed FA function of the target distribution terminal is put into operation, detecting whether a post-acceleration remote tripping command transmitted by an adjacent distribution terminal is received; wherein the adjacent distribution terminal is a distribution terminal configured on an adjacent switch of a current switch to which the target distribution terminal belongs; when no post-acceleration remote tripping command is received and the target distribution terminal performs a post-acceleration protection action, judging the action cause of the post-acceleration protection action within a preset memory period of the reclosing action, so as to determine the information transmission mode of the adjacent post-acceleration remote tripping command according to the action cause; when a post-acceleration remote tripping command is received, starting the post-acceleration remote tripping protection according to the post-acceleration remote tripping command; determining the longitudinal protection action information within a preset memory period of the longitudinal protection action according to the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, so as to determine the operation information for the reclosing in the target distribution terminal according to the longitudinal protection action information.

[0006] According to some embodiments, the action cause of the post-acceleration protection action within a preset reclosing action memory period is judged to determine the information transmission method of the adjacent post-acceleration remote trip command according to the action cause, including: obtaining multiple action signals of the target distribution terminal within the reclosing action memory period; determining whether the reclosing action signal is included based on the multiple action signals; if included, determining that the action cause is the reclosing action causing the current switch to close to the fault after closing; if not included, determining that the action cause is the manual closing action causing the current switch to close to the fault after closing.

[0007] According to some embodiments, the cause of the post-acceleration protection action within a preset reclosing action memory period is judged to determine the information transmission method of the adjacent post-acceleration remote trip command according to the cause of the action, and also includes: when the action cause is a reclosing action, the information transmission method is determined to send an adjacent post-acceleration remote trip command to an adjacent distribution terminal; when the action cause is a manual closing action, the information transmission method is determined to re-detect whether the intelligent distributed FA function is put into operation.

[0008] According to some embodiments, based on the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, the longitudinal protection action information within a preset longitudinal protection action memory period is determined, so as to determine the operation information for the reclosing switch in the target distribution terminal based on the longitudinal protection action information, including: determining the longitudinal protection action memory period according to the moment when the distribution network line trips due to a fault; obtaining the fault signal stored in the longitudinal protection action memory period; and generating the longitudinal protection action information based on the fault signal.

[0009] According to some embodiments, longitudinal protection action information is generated based on the fault section, including: if the fault signal contains a longitudinal protection action signal, it is determined that there is a longitudinal protection action within the longitudinal protection action memory period, and a prompt of the existence of the longitudinal protection action is used as the longitudinal protection action information; if the fault signal does not contain a longitudinal protection action signal, it is determined that there is no longitudinal protection action within the longitudinal protection action memory period, and an over-tripping prompt is used as the longitudinal protection action information to re-detect whether the intelligent distributed FA function is put into operation.

[0010] According to some embodiments, based on the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, the longitudinal protection action information within the preset longitudinal protection action memory period is determined, so as to determine the operation information for the reclosing switch in the target distribution terminal according to the longitudinal protection action information, and also includes: determining whether there is a longitudinal protection action within the longitudinal protection action memory period according to the longitudinal protection action information; in the case of the presence of a longitudinal protection action, performing a post-acceleration remote tripping protection action to trip the current switch corresponding to the target distribution terminal, and determining the locked reclosing mode as the operation information; in the case of the absence of a longitudinal protection action, re-detecting whether the intelligent distributed FA function is put into operation.

[0011] According to some embodiments, the above method also includes: detecting action setting information corresponding to a pre-set intelligent distributed FA function; when the action setting information is turned on, determining that the intelligent distributed FA function is put into operation; when the action setting information is not turned on, determining that the intelligent distributed FA function is not put into operation, so as to repeatedly detect the action setting information.

[0012] According to one aspect of the present application, a post-acceleration remote trip protection device for a power distribution terminal is provided, comprising:

[0013] A command detection module, used to detect whether a post-acceleration remote jump command transmitted by an adjacent distribution terminal is received when the intelligent distributed FA function of the target distribution terminal is put into operation; wherein the adjacent distribution terminal is a distribution terminal configured on an adjacent switch of the current switch to which the target distribution terminal belongs;

[0014] An action cause determination module is used to determine the action cause of the post-acceleration protection action within a preset reclosing action memory period when no post-acceleration remote trip command is received and the target distribution terminal performs the post-acceleration protection action, so as to determine the information transmission mode of the adjacent post-acceleration remote trip command according to the action cause;

[0015] A protection module, configured to start a rear acceleration far jump protection according to the rear acceleration far jump command when a rear acceleration far jump command is received;

[0016] The longitudinal protection determination module is used to determine the longitudinal protection action information within a preset longitudinal protection action memory period based on the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, so as to determine the operation information for the reclosing switch in the target distribution terminal based on the longitudinal protection action information.

[0017] Optionally, the action cause determination module may be specifically used for:

[0018] Acquire multiple action signals of the target distribution terminal within the reclosing action memory period;

[0019] Determining whether a reclosing action signal is included according to multiple action signals;

[0020] If it is included, it is determined that the action cause is the reclosing action causing the current switch to close to the fault after closing;

[0021] If not included, it is determined that the action cause is a manual closing action that causes the current switch to close to a fault after closing.

[0022] Optionally, the action cause determination module may also be specifically used for:

[0023] When the action reason is a reclosing action, the information transmission mode is determined as sending an adjacent rear acceleration remote trip command to the adjacent distribution terminal;

[0024] When the action cause is a manual closing action, the information transmission method is determined to re-detect whether the intelligent distributed FA function is put into operation.

[0025] Optionally, the pilot protection determination module may be specifically used for:

[0026] Determine the action memory period of the pilot protection according to the moment when the distribution network line trips due to a fault;

[0027] Obtain the fault signal stored in the longitudinal protection action memory period;

[0028] Generate longitudinal protection action information based on the fault signal.

[0029] Optionally, when the longitudinal protection determination module generates the longitudinal protection action information based on the fault section, it can be specifically used for:

[0030] If the fault signal includes a pilot protection action signal, it is determined that there is a pilot protection action within the pilot protection action memory period, so that the fault section and the prompt of the existence of the pilot protection action are used as the pilot protection action information;

[0031] If the fault signal does not contain the longitudinal protection action signal, it is determined that there is no longitudinal protection action within the longitudinal protection action memory period, and the over-trip prompt is used as the longitudinal protection action information to re-check whether the intelligent distributed FA function is put into operation.

[0032] Optionally, the pilot protection determination module may also be used for:

[0033] According to the longitudinal protection action information, determine whether there is a longitudinal protection action within the longitudinal protection action memory period;

[0034] In the case of a longitudinal protection action, a post-acceleration remote trip protection action is performed to trip the current switch corresponding to the target distribution terminal, and the locking reclosing mode is determined as the operation information;

[0035] In the absence of pilot protection action, re-check whether the intelligent distributed FA function is in operation.

[0036] Optionally, the post-acceleration remote trip protection device of the power distribution terminal may further include a function input determination module, which is used to:

[0037] Detecting the action setting information corresponding to the preset intelligent distributed FA function;

[0038] When the action setting information is turned on, it is determined that the intelligent distributed FA function is put into operation;

[0039] When the action setting information is not enabled, it is determined that the intelligent distributed FA function is not put into operation, so as to repeatedly detect the action setting information.

[0040] According to one aspect of the present application, an electronic device is proposed, which includes: a processor; a memory storing a computer program, and when the computer program is executed by the processor, the processor executes the post-acceleration remote trip protection method of the distribution terminal as described above.

[0041] According to one aspect of the present application, a non-transitory computer-readable medium is provided, on which readable instructions are stored. When the instructions are executed by a processor, the processor executes the post-acceleration remote trip protection method of the power distribution terminal as described above.

[0042] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application.

[0043] Beneficial effects:

[0044] Through the above-mentioned embodiments provided by the present application, after the intelligent distributed FA function is put into operation, when the target distribution terminal detects the reclosing action and the switch on the distribution network line triggers the accelerated protection action due to closing the fault, the post-acceleration remote trip command can be quickly sent to the distribution terminal of the adjacent switch, so that the fault point can be quickly and accurately isolated, reducing the scope of the fault impact, and improving the stability and reliability of the power grid. By considering whether the adjacent distribution terminal has a longitudinal protection action record in the near future before receiving the post-acceleration remote trip command, the problem caused by the inconsistent reclosing time setting of the distribution terminals at the adjacent ends of the distribution network line can be effectively avoided. Even if the reclosing time of one end is short and causes the fault to reclose first, the adjacent terminal can also start the post-acceleration remote trip protection in time according to the previous longitudinal protection action record, avoiding the downstream switch of the fault point from reclosing again, thereby ensuring that the fault is completely isolated. In addition, the present application determines whether to execute the post-acceleration remote trip protection and lock the reclosing according to the longitudinal protection action information, which significantly enhances the self-healing ability of the distribution system. It effectively avoids the self-healing gate failure that may occur when the intelligent distributed FA and the reclosing switch are put into operation at the same time, and improves the overall operation efficiency and reliability of the distribution system. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without exceeding the scope of protection required by the present application.

[0046] Figure 1 A flow chart of a post-acceleration remote trip protection method for a power distribution terminal provided in an embodiment of the present application;

[0047] Figure 2 A specific implementation flowchart of determining the action cause of the post-acceleration protection action within a preset reclosing action memory period in step S11 provided in an embodiment of the present application;

[0048] Figure 3 A specific implementation flow chart of the information transmission method for determining the adjacent rear acceleration far jump command according to the action cause in step S11 provided in an embodiment of the present application;

[0049] Figure 4 A specific implementation flowchart of determining the longitudinal protection action information within a preset longitudinal protection action memory period according to the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs in step S13 provided in the embodiment of the present application;

[0050] Figure 5A specific implementation flow chart of generating pilot protection action information based on a fault signal in step S131 provided in an embodiment of the present application;

[0051] Figure 6 A specific implementation flow chart of determining the operation information for the reclosing switch in the target distribution terminal according to the longitudinal protection action information in step S13 provided in an embodiment of the present application;

[0052] Figure 7 A specific implementation flow chart for detecting whether the intelligent distributed FA function is put into operation provided in an embodiment of the present application;

[0053] Figure 8 A block diagram of a post-acceleration remote trip protection device for a power distribution terminal provided in an embodiment of the present application;

[0054] Fig. 9 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0056] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0057] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0058] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0059] It should be understood that although the terms first, second, third, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present application. As used herein, the term "and / or" includes any one of the associated listed items and all combinations of one or more.

[0060] For specific implementation methods, please refer to the following embodiments.

[0061] Figure 1 This is a flow chart of a post-acceleration remote trip protection method for a power distribution terminal provided in an embodiment of the present application. The method of this embodiment can be applied to a post-acceleration remote trip protection server. Figure 1 As shown, the method includes: step S10, step S11, step S12 and step S13.

[0062] In step S10, when the intelligent distributed FA function of the target distribution terminal is put into operation, it is detected whether a post-acceleration far jump command transmitted by an adjacent distribution terminal is received; wherein the adjacent distribution terminal is a distribution terminal configured on an adjacent switch of the current switch of the target distribution terminal.

[0063] In the present application, the target distribution terminal can be used to represent the distribution terminal of the current switch configuration. The distribution terminal is equipped with an intelligent distributed FA function, that is, it does not rely on the global control of the distribution master station or the distribution substation, but through the mutual communication, protection coordination or timing coordination between the distribution terminal equipment (such as FTU, DTU, etc.), to achieve the function of rapid fault location, isolation and power supply restoration in non-fault areas.

[0064] The adjacent power distribution terminal is used to indicate the power distribution terminal configured on the switch adjacent to the current switch. In some implementations, there are multiple adjacent power distribution terminals. The post-acceleration remote trip command may be a command to control the current switch to trip and prevent the reclosing switch from starting again. The command may include the terminal ID or other unique identifier that sends the command.

[0065] According to the example embodiment, the action signal setting of the FA function can be detected first, and the action signal can be set in advance by the operation and maintenance personnel. If the action signal of the FA function is detected to be 1, it can indicate that the intelligent distributed FA function of the target power distribution terminal is put into operation. At this time, it can be detected whether the data receiving module of the target power distribution terminal receives data in the format of the post-acceleration far jump command. If the data exists, it indicates that the post-acceleration far jump command transmitted by the adjacent power distribution terminal has been received.

[0066] In some implementations, if it is not detected that the intelligent distributed FA function is put into operation, detection is continued until it is detected that the intelligent distributed FA function of the target power distribution terminal is put into operation.

[0067] In step S11, when the post-acceleration remote trip command is not received and the target distribution terminal executes the post-acceleration protection action, the action cause of the post-acceleration protection action is determined within the preset reclosing action memory period, so as to determine the information transmission method of the adjacent post-acceleration remote trip command according to the action cause.

[0068] In the present application, the reclosing action memory period can be a pre-set period, and the end time of the period is the time when the target distribution terminal performs the post-acceleration protection action. The information transmission method of the adjacent post-acceleration remote trip command can include a method of sending a post-acceleration remote trip command to the adjacent distribution terminal, and can also include a method of not sending a post-acceleration remote trip command.

[0069] According to the example embodiment, if the post-acceleration remote trip command is not received, and the target distribution terminal is detected to have executed the post-acceleration protection action, the action cause of the post-acceleration protection action can be determined based on various operating data of the post-acceleration protection during the preset reclosing action memory period, and the processing method for the data. In some implementations, the action cause may be that the operation and maintenance personnel manually closed the switch, or the reclosing action. In order to obtain the information transmission method of the adjacent post-acceleration remote trip command corresponding to the action cause.

[0070] In the present application, the preset reclosing action memory period needs to be greater than the action time of the post-acceleration protection of the target distribution terminal of the current switch configuration.

[0071] In step S12, when a rear acceleration far jump command is received, the rear acceleration far jump protection is started according to the rear acceleration far jump command.

[0072] According to an example embodiment, if a post-acceleration far jump command is received, a post-acceleration far jump protection is initiated in response to the post-acceleration far jump command.

[0073] In step S13, according to the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, the longitudinal protection action information within the preset longitudinal protection action memory period is determined, so as to determine the operation information of the reclosing switch in the target distribution terminal according to the longitudinal protection action information.

[0074] In this application, the longitudinal protection action memory period is a pre-set period, and the time when the acceleration remote trip protection is started after this period is the end time. The longitudinal protection action information can be used to indicate whether the longitudinal protection action is performed within the longitudinal protection action memory period. The operation information for the reclosing switch in the target distribution terminal can include locking the reclosing switch or not controlling the reclosing switch.

[0075] According to an example embodiment, after the post-acceleration remote trip protection is started, the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs can be obtained first. In some implementations, the longitudinal protection action information corresponding to the fault signal can be matched based on the preset correspondence relationship between the fault signal and the longitudinal protection action information, so as to respond to the longitudinal protection action information to determine the operation information for the reclosing switch in the target distribution terminal.

[0076] In this application, the preset longitudinal protection action memory period must be greater than the maximum value of the reclosing action time set by the distribution terminal configured for all switches in the distribution network area where the intelligent distributed FA is applied.

[0077] After the intelligent distributed FA function is put into operation, when the target distribution terminal detects the reclosing action and the switch on the distribution network line triggers the accelerated protection action due to closing the fault, the application can quickly send the post-acceleration remote trip command to the distribution terminal of the adjacent switch, so that the fault point can be quickly and accurately isolated, reducing the scope of the fault impact and improving the stability and reliability of the power grid. By considering whether the adjacent distribution terminal has a longitudinal protection action record in the recent period before receiving the post-acceleration remote trip command, the problem caused by the inconsistent reclosing time setting of the distribution terminals at the adjacent ends of the distribution network line can be effectively avoided. Even if the reclosing time of one end is shorter and causes the fault to reclose first, the adjacent terminal can also start the post-acceleration remote trip protection in time according to the previous longitudinal protection action record, avoiding the downstream switch of the fault point from reclosing again, thereby ensuring that the fault is completely isolated. In addition, the application determines whether to execute the post-acceleration remote trip protection and lock the reclosing according to the longitudinal protection action information, which significantly enhances the self-healing ability of the distribution system. It effectively avoids the self-healing gate failure that may occur when the intelligent distributed FA and the reclosing switch are put into operation at the same time, and improves the overall operation efficiency and reliability of the distribution system.

[0078] According to some embodiments, reference Figure 2 The determination in step S11 of the cause of the post-acceleration protection action within the preset reclosing action memory period can be specifically implemented through steps S110 and S111.

[0079] In step S110, a plurality of action signals of the target distribution terminal within the reclosing action memory period are obtained; and based on the plurality of action signals, it is determined whether a reclosing action signal is included.

[0080] According to an example embodiment, during the reclosing action memory period, the target power distribution terminal may involve multiple actions, corresponding to multiple action signals, which may include a reclosing action signal. In some implementations, different action signal formats may be pre-set, and the action signals may be matched to determine whether a reclosing action signal is included.

[0081] In other implementations, the data in the action signal may be analyzed to determine whether there is a unique identifier corresponding to the reclosing switch.

[0082] In step S111, if included, it is determined that the action cause is a reclosing action that causes the current switch to close to a fault after closing; if not included, it is determined that the action cause is a manual closing action that causes the current switch to close to a fault after closing.

[0083] According to the example embodiment, if a reclosing action signal is included, then it can be determined that the action cause is the reclosing action causing the current switch to close due to a fault after successful closing; if the reclosing action signal is not included, then it can be determined that the action cause is manual closing causing the current switch to close due to a fault after successful closing.

[0084] The present application can accurately distinguish the specific cause of the post-acceleration protection action by acquiring multiple action signals of the target distribution terminal within the preset reclosing action memory period and analyzing these signals in detail. If the action cause is the reclosing action, further operation is performed.

[0085] According to some embodiments, reference Figure 3 The information transmission method of determining the adjacent rear acceleration far jump command according to the action cause in step S11 can be specifically implemented through steps S112 and S113.

[0086] In step S112, when the action cause is a reclosing action, the information transmission method is determined to send an adjacent rear acceleration remote trip command to the adjacent distribution terminal.

[0087] In the present application, the adjacent post-acceleration far jump command may be a command for requiring the adjacent power distribution terminal to execute a post-acceleration far jump action.

[0088] According to an example embodiment, if the action cause is a reclosing action, an adjacent rear acceleration remote trip command may be sent to an adjacent power distribution terminal.

[0089] In step S113, when the action cause is a manual closing action, the information transmission mode is determined to re-detect whether the intelligent distributed FA function is put into operation.

[0090] According to the example embodiment, if the cause of the action is a manual closing action, the transmission of the post-acceleration remote jump command is not performed at this time, and the intelligent distributed FA function is re-detected to see whether it is put into operation, so as to execute the operations of this application in sequence, and then perform subsequent operations until the cause of the action is known to be a reclosing action.

[0091] When the action cause is a reclosing action, this application directly sends an adjacent rear acceleration remote trip command to the adjacent distribution terminal, quickly transmits the fault information, and ensures that the adjacent distribution terminal can respond in time and take corresponding protective measures. This efficient information transmission method helps to reduce the risk of fault spread and improve the stability and reliability of the power grid. In the case where the action cause is a manual closing action, re-checking whether the intelligent distributed FA function is put into operation can reconfirm whether the intelligent distributed FA function is in normal working condition. Through this additional safety check, the safety and stability of the power grid operation can be further ensured, avoiding potential risks caused by misoperation or system failures.

[0092] According to some embodiments, reference Figure 4 In step S13, according to the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, the longitudinal protection action information within the preset longitudinal protection action memory period is determined, which can be specifically implemented through steps S130 and S131.

[0093] In step S130, the longitudinal protection action memory period is determined according to the time when the distribution network line trips due to a fault.

[0094] According to the exemplary embodiment, the moment when the distribution network line trips due to a fault is taken as the termination moment, and the period before t1 seconds is selected as the longitudinal protection action memory period. The selection of t1 seconds is related to the preset settings of the distribution terminals configured by all switches in the distribution network area where the intelligent distributed FA is applied, and it is necessary to ensure that the longitudinal protection action memory period is greater than the maximum value of the preset reclosing action time of the distribution terminals configured by all switches.

[0095] In step S131, the fault signal stored in the longitudinal protection action memory period is obtained; and the longitudinal protection action information is generated according to the fault signal.

[0096] According to the example embodiment, the protection action signal of the distribution terminal collected by the fault signal collection module can be obtained, and the protection action signal therein can be used as the fault signal in the longitudinal protection action memory period, based on which the longitudinal protection action information can be generated according to the fault signal. Among them, the protection action signal may include but is not limited to overcurrent protection action signal, zero-sequence overcurrent protection action signal, overvoltage protection action signal, low voltage protection action signal, and longitudinal protection action signal, wherein the longitudinal protection is a protection realized based on the information interaction of adjacent distribution terminals, including but not limited to longitudinal current differential protection, longitudinal overcurrent protection, or longitudinal zero-sequence overcurrent protection.

[0097] This application can efficiently screen out fault signals directly related to the current fault by capturing the precise moment when the distribution network line trips due to a fault, and setting the longitudinal protection action memory period accordingly. During the preset longitudinal protection action memory period, various fault-related signals can be automatically acquired and stored, avoiding interference from irrelevant information and ensuring the accuracy and integrity of the data. Based on the acquisition of fault signals, longitudinal protection action information can be automatically generated, providing reliable information support for the automated protection of the distribution network.

[0098] According to some embodiments, reference Figure 5 In step S131, the longitudinal protection action information is generated based on the fault section, which can be specifically implemented through steps S1310 and S1311.

[0099] In step S1310, if the fault signal includes a pilot protection action signal, it is determined that there is a pilot protection action within the pilot protection action memory period, so that the fault section and the prompt of the existence of the pilot protection action are used as pilot protection action information.

[0100] In the present application, if a longitudinal protection action occurs at the power distribution terminal, the fault signal will include a corresponding longitudinal protection action signal.

[0101] According to the example embodiment, if the fault signal includes a longitudinal protection action signal, it may indicate that a longitudinal protection action has been performed within the longitudinal protection action memory period. At this time, the prompt "there is a longitudinal protection action" may be used as the longitudinal protection action information.

[0102] In step S1311, if the fault signal does not include a longitudinal protection action signal, it is determined that there is no longitudinal protection action within the longitudinal protection action memory period, and the over-trip prompt is used as the longitudinal protection action information to re-check whether the intelligent distributed FA function is put into operation.

[0103] According to the example embodiment, if the fault signal does not include a pilot protection action signal, it may indicate that no pilot protection action has been performed within the pilot protection action memory period, and an over-trip may have occurred. In this case, the "over-trip" prompt may be used as the pilot protection action information. And re-check whether the intelligent distributed FA function is put into operation, and operate according to the sequence of this application until the fault section is not empty.

[0104] The present application determines whether there is a longitudinal protection action in the fault signal. If so, it indicates that there is a longitudinal protection action and the fault section judgment and fault isolation are achieved; if not, it indicates that an abnormal situation such as over-tripping may have occurred, so as to facilitate the adoption of corresponding protection measures.

[0105] According to an example embodiment, referring to Figure 6 In step S13, the operation information of the reclosing switch in the target distribution terminal is determined according to the longitudinal protection action information, which can be specifically implemented through steps S132 and S133.

[0106] In step S132, based on the pilot protection action information, it is determined whether there is a pilot protection action within the pilot protection action memory period.

[0107] According to the example embodiment, the longitudinal protection action information includes different prompts, and based on the content of the prompts, it can be determined whether there is a longitudinal protection action within the longitudinal protection action memory period.

[0108] In step S133, when there is a longitudinal protection action, a post-acceleration remote trip protection action is performed to trip the current switch corresponding to the target distribution terminal, and the locked reclosing mode is determined as the operation information; when there is no longitudinal protection action, re-check whether the intelligent distributed FA function is put into operation.

[0109] According to the exemplary embodiment, in the case of a longitudinal protection action, the target distribution terminal performs a post-acceleration remote trip protection action to trip the current switch to which it belongs. The method of locking the reclosing switch is determined as operation information, and in response to the information, a preset locking logic is started, or the reclosing switch exit pressure plate preset on the protection device is controlled to lock the reclosing switch. In the case of no longitudinal protection action, it is detected whether the intelligent distributed FA function is put into operation, and the aforementioned non-conflicting steps are executed.

[0110] This application improves the response speed to distribution network faults by real-time monitoring of the longitudinal protection action information and quickly executing the post-acceleration remote trip protection action when there is a longitudinal protection action. The fault area can be isolated in time to prevent the fault from further expanding, thereby ensuring the safe and stable operation of the power grid. After the longitudinal protection action is detected, the operation information of the locked reclosing switch can be intelligently determined. This flexible control method can adjust the reclosing strategy according to actual conditions, avoid blind reclosing when the fault is not cleared, and effectively reduce the risk of reclosing failure. When the longitudinal protection action is not detected, it is possible to re-detect whether the intelligent distributed FA function is put into operation to ensure that the intelligent distributed FA function can function normally when needed, thereby improving the automation level and fault handling capabilities of the distribution network.

[0111] According to some embodiments, reference Figure 7 The present application can also detect whether the intelligent distributed FA function is put into operation, which can be specifically achieved through steps S14 and S15.

[0112] In step S14, the action setting information corresponding to the preset intelligent distributed FA function is detected; when the action setting information is turned on, it is determined that the intelligent distributed FA function is put into operation.

[0113] In some implementations, the operation and maintenance personnel may pre-set the action settings corresponding to the intelligent distributed FA function. If the action setting information is set to 1, it may indicate that it is turned on, and at this time, it is determined that the intelligent distributed FA function is put into operation.

[0114] In step S15, when the action setting information is not enabled, it is determined that the intelligent distributed FA function is not in operation, so as to repeatedly detect the action setting information.

[0115] In some implementations, if the action setting information is set to 0, it may indicate shutdown, and it is determined that the intelligent distributed FA function is not put into operation. In this case, the action setting information is repeatedly detected until it is determined that the intelligent distributed FA function is put into operation.

[0116] This application can automatically determine whether the intelligent distributed FA function has been correctly configured and put into operation by detecting the action setting information of the intelligent distributed FA function, avoiding errors and delays that may be caused by manual inspection and improving the efficiency of fault handling. When the intelligent distributed FA function is put into operation, it can quickly respond to fault signals in the distribution network, automatically perform fault isolation and recovery operations, reduce the impact of faults on the power grid, and improve power supply reliability and stability.

[0117] The following describes an apparatus embodiment of the present application, which can be used to execute the method embodiment of the present application. For details not disclosed in the apparatus embodiment of the present application, reference can be made to the method embodiment of the present application.

[0118] Figure 8 This is a block diagram of a post-acceleration remote trip protection device for a power distribution terminal provided in an embodiment of the present application. Figure 8 As shown, the post-acceleration remote trip protection device 800 of the power distribution terminal includes a command detection module 801, an action cause determination module 802, a protection module 803 and a longitudinal protection determination module 804.

[0119] The command detection module 801 is used to detect whether a post-acceleration remote jump command transmitted by an adjacent distribution terminal is received when the intelligent distributed FA function of the target distribution terminal is put into operation; wherein the adjacent distribution terminal is a distribution terminal configured on an adjacent switch of the current switch to which the target distribution terminal belongs;

[0120] The action cause determination module 802 is used to determine the action cause of the post-acceleration protection action within a preset reclosing action memory period when the post-acceleration remote trip command is not received and the target distribution terminal performs the post-acceleration protection action, so as to determine the information transmission mode of the adjacent post-acceleration remote trip command according to the action cause;

[0121] The protection module 803 is used to start the rear acceleration far jump protection according to the rear acceleration far jump command when receiving the rear acceleration far jump command;

[0122] The longitudinal protection determination module 804 is used to determine the longitudinal protection action information within a preset longitudinal protection action memory period based on the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, so as to determine the operation information of the reclosing switch in the target distribution terminal based on the longitudinal protection action information.

[0123] Optionally, the action cause determination module 802 may be specifically configured to:

[0124] Acquire multiple action signals of the target distribution terminal within the reclosing action memory period;

[0125] Determining whether a reclosing action signal is included according to multiple action signals;

[0126] If it is included, it is determined that the action cause is the reclosing action causing the current switch to close to the fault after closing;

[0127] If not included, it is determined that the cause of the action is that the manual closing action causes the current switch to close to a fault after closing;.

[0128] Optionally, the action cause determination module 802 may also be specifically configured to:

[0129] When the action reason is a reclosing action, the information transmission mode is determined as sending an adjacent rear acceleration remote trip command to the adjacent distribution terminal;

[0130] When the action cause is a manual closing action, the information transmission method is determined to re-detect whether the intelligent distributed FA function is put into operation.

[0131] Optionally, the pilot protection determination module 804 may be specifically configured to:

[0132] Determine the action memory period of the pilot protection according to the moment when the distribution network line trips due to a fault;

[0133] Obtain the fault signal stored in the longitudinal protection action memory period;

[0134] Generate longitudinal protection action information based on the fault signal.

[0135] Optionally, when the longitudinal protection determination module 804 generates the longitudinal protection action information based on the fault section, it can be specifically used to:

[0136] If the fault signal includes a pilot protection action signal, it is determined that there is a pilot protection action within the pilot protection action memory period, so that the fault section and the prompt of the existence of the pilot protection action are used as the pilot protection action information;

[0137] If the fault signal does not contain the longitudinal protection action signal, it is determined that there is no longitudinal protection action within the longitudinal protection action memory period, and the over-trip prompt is used as the longitudinal protection action information to re-check whether the intelligent distributed FA function is put into operation.

[0138] Optionally, the pilot protection determination module 804 may also be specifically configured to:

[0139] According to the longitudinal protection action information, determine whether there is a longitudinal protection action within the longitudinal protection action memory period;

[0140] In the case of a longitudinal protection action, a post-acceleration remote trip protection action is performed to trip the current switch corresponding to the target distribution terminal, and the locking reclosing mode is determined as the operation information;

[0141] In the absence of pilot protection action, re-check whether the intelligent distributed FA function is in operation.

[0142] Optionally, the post-acceleration remote trip protection device 800 of the power distribution terminal may further include a function input determination module 805, which is used to:

[0143] Detecting the action setting information corresponding to the preset intelligent distributed FA function;

[0144] When the action setting information is turned on, it is determined that the intelligent distributed FA function is put into operation;

[0145] When the action setting information is not enabled, it is determined that the intelligent distributed FA function is not put into operation, so as to repeatedly detect the action setting information.

[0146] The device performs functions similar to the method provided above. For other functions, please refer to the previous description and will not be repeated here.

[0147] Fig. 9 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, such as Fig. 9 As shown, the electronic device 900 of this embodiment may include: a memory 901 and a processor 902 .

[0148] The memory 901 stores a computer program. When the computer program is executed by the processor 902, the processor 902 executes the method in the above embodiment.

[0149] The processor 902 and the memory 901 are connected, for example, via a bus.

[0150] Optionally, the electronic device 900 may further include a transceiver. It should be noted that in actual applications, the number of transceivers is not limited to one, and the structure of the electronic device 900 does not constitute a limitation on the embodiments of the present application.

[0151] The processor 902 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor 902 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0152] The bus may include a path to transmit information between the above components. The bus may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0153] The memory 901 can be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.

[0154] The memory 901 is used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 902. The processor 902 is used to execute the application code stored in the memory 901 to implement the contents shown in the above method embodiment.

[0155] The electronic devices include, but are not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and fixed terminals such as digital TVs, desktop computers, etc. It can also be a server, etc. Fig. 9 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0156] The electronic device of this embodiment can be used to execute the method of any of the above embodiments, and its implementation principle and technical effect are similar, which will not be described in detail here.

[0157] The present application also provides a non-transitory computer-readable storage medium having computer-readable instructions stored thereon. When the aforementioned instructions are executed by a processor, the processor executes the method in the above embodiment.

[0158] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a non-transient computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0159] The embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and its core idea of ​​the present application. At the same time, changes or deformations made by those skilled in the art based on the ideas of the present application, the specific implementation methods and the scope of application of the present application, all belong to the scope of protection of the present application. In summary, the content of this specification should not be construed as a limitation on the present application.

Claims

1. A post-acceleration remote trip protection method for a power distribution terminal, characterized in that: include: When the intelligent distributed FA function of the target power distribution terminal is put into operation, detecting whether a post-acceleration far jump command transmitted by an adjacent power distribution terminal is received; wherein the adjacent power distribution terminal is a power distribution terminal configured on an adjacent switch of the current switch to which the target power distribution terminal belongs; In the case where the post-acceleration remote trip command is not received and the target power distribution terminal performs the post-acceleration protection action, determining the action cause of the post-acceleration protection action within the preset reclosing action memory period, so as to determine the information transmission mode of the adjacent post-acceleration remote trip command according to the action cause; When receiving the rear acceleration far jump command, starting the rear acceleration far jump protection according to the rear acceleration far jump command; According to the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, the longitudinal protection action information within the preset longitudinal protection action memory period is determined, so as to determine the operation information for the reclosing switch in the target distribution terminal according to the longitudinal protection action information.

2. The method according to claim 1, characterized in that: The determining of the action cause of the post-acceleration protection action within the preset reclosing action memory period, and determining the information transmission mode of the adjacent post-acceleration remote trip command according to the action cause, includes: Acquire multiple action signals of the target power distribution terminal within a reclosing action memory period; Determining, according to the multiple action signals, whether a reclosing action signal is included; If included, it is determined that the action cause is a reclosing action causing the current switch to close to a fault after closing; If not included, it is determined that the action cause is a manual closing action causing the current switch to close to a fault after closing.

3. The method according to claim 2, characterized in that The determining of the action cause of the post-acceleration protection action within the preset reclosing action memory period, and determining the information transmission mode of the adjacent post-acceleration remote trip command according to the action cause, also includes: In the case where the action cause is the reclosing action, the information transmission mode is determined as sending the adjacent rear acceleration remote trip command to the adjacent power distribution terminal; When the action cause is the manual closing action, the information transmission mode is determined to re-detect whether the intelligent distributed FA function is put into operation.

4. The method according to claim 1, characterized in that The step of determining the longitudinal protection action information within a preset longitudinal protection action memory period according to the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, so as to determine the operation information for the reclosing switch in the target distribution terminal according to the longitudinal protection action information, comprises: Determining the pilot protection action memory period according to the moment when the distribution network line fails and trips; Acquiring the fault signal stored in the longitudinal protection action memory period; The longitudinal protection action information is generated according to the fault signal.

5. The method according to claim 4, characterized in that The generating the pilot protection action information based on the fault signal includes: If the fault signal includes a pilot protection action signal, determining that a pilot protection action exists within the pilot protection action memory period, and using the prompt of the existence of the pilot protection action as the pilot protection action information; If the fault signal does not include a longitudinal protection action signal, it is determined that there is no longitudinal protection action within the longitudinal protection action memory period, and the over-trip prompt is used as the longitudinal protection action information to re-check whether the intelligent distributed FA function is put into operation.

6. The method according to claim 5, characterized in that The method further comprises: determining the longitudinal protection action information within a preset longitudinal protection action memory period according to the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, so as to determine the operation information for the reclosing switch in the target distribution terminal according to the longitudinal protection action information; Determining whether there is a longitudinal protection action within the longitudinal protection action memory period according to the longitudinal protection action information; In the case of the existence of the longitudinal protection action, a post-acceleration remote trip protection action is performed to trip the current switch corresponding to the target power distribution terminal, and locking the reclosing switch is determined as the operation information; In the absence of the longitudinal protection action, re-detect whether the intelligent distributed FA function is put into operation.

7. The method according to any one of claims 1 to 6, characterized in that: Also includes: Detecting the preset action setting information corresponding to the intelligent distributed FA function; In the case where the action setting information is turned on, determining that the intelligent distributed FA function is put into operation; In the case where the action setting information is not enabled, it is determined that the intelligent distributed FA function is not in operation, so as to repeatedly detect the action setting information.

8. A post-acceleration remote trip protection device for a power distribution terminal, characterized in that: include: A command detection module, used to detect whether a post-acceleration remote jump command transmitted by an adjacent distribution terminal is received when the intelligent distributed FA function of the target distribution terminal is put into operation; wherein the adjacent distribution terminal is a distribution terminal configured on an adjacent switch of the current switch to which the target distribution terminal belongs; An action cause determination module, for determining the action cause of the post-acceleration protection action within a preset reclosing action memory period when the post-acceleration remote trip command is not received and the target power distribution terminal performs the post-acceleration protection action, so as to determine the information transmission mode of the adjacent post-acceleration remote trip command according to the action cause; A protection module, configured to start a rear acceleration far jump protection according to the rear acceleration far jump command when the rear acceleration far jump command is received; A longitudinal protection determination module is used to determine the longitudinal protection action information within a preset longitudinal protection action memory period based on the fault signals of multiple switches on the distribution network line to which the target distribution terminal belongs, so as to determine the operation information for the reclosing switch in the target distribution terminal based on the longitudinal protection action information.

9. An electronic device, characterized in that: include: processor; A memory storing a computer program, which, when executed by the processor, enables the processor to execute the post-acceleration remote trip protection method for the power distribution terminal as described in any one of claims 1-7.

10. A non-transitory computer-readable storage medium, characterized in that: Computer-readable instructions are stored thereon, and when the instructions are executed by a processor, the processor executes the post-acceleration remote trip protection method for a distribution terminal as described in any one of claims 1-7.

Images