CN116914704B - Distribution network relay protection fixed value configuration method, device, equipment and medium - Google Patents

Abstract

The invention provides a distribution network relay protection constant value configuration method, a device, electronic equipment and a storage medium, which can be applied to the technical field of distribution network relay protection. The method comprises the following steps: dividing the target power distribution network into a plurality of line sections based on initial relay protection fixed values of each of a plurality of line switches included in the target power distribution network, wherein the initial relay protection fixed values comprise delay fixed values; determining respective fault frequencies of a plurality of line segments based on respective delay fixed values of the plurality of line switches and fault recording data of a target power distribution network; determining a unit fault rate of each of the plurality of line segments based on the fault frequency of each of the plurality of line segments and the line length of each of the plurality of line segments; determining a constant value adjustment strategy based on the unit fault rate of each of the plurality of line segments; and updating the initial relay protection fixed values of the plurality of line switches based on the fixed value adjustment strategy to obtain the target relay protection fixed values of the plurality of line switches.

Description

Distribution network relay protection fixed value configuration method, device, equipment and medium

Technical Field

The invention relates to the technical field of relay protection of power distribution networks, in particular to a method and a device for configuring relay protection fixed values of power distribution networks, electronic equipment and a storage medium.

Background

The distribution network is used as an important component of the power system, and in the operation process, faults such as short circuit, open circuit, grounding and the like often occur due to the influence of electromagnetic force, mechanical force, oxidation aging and other factors, so that the equipment cannot normally operate, and the normal power supply of the power system is influenced. Along with the improvement of the production living standard, the demand of various fields for electric power energy is continuously increased, and once a power supply fault occurs in an electric power system, large loss is usually caused, and even safety accidents occur.

In the related technology, relay protection measures are applied to the power distribution network, so that the operation safety and reliability of the power distribution network can be improved, measures can be taken in time when an operation fault occurs, the fault influence range is reduced, and the accident loss is reduced.

The relay protection operation needs to be applied to setting of a power distribution network protection fixed value, and in the related art, setting of the power distribution network protection fixed value is usually completed by power distribution network professionals based on experience, and the problem that frequent power supply of users of part of lines is abnormal can occur.

Disclosure of Invention

In view of the above, the invention provides a distribution network relay protection constant value configuration method, a device, electronic equipment and a storage medium.

The invention provides a relay protection fixed value configuration method for a power distribution network, which comprises the following steps: dividing a target power distribution network into a plurality of line sections based on initial relay protection fixed values of a plurality of line switches included in the target power distribution network, wherein the initial relay protection fixed values comprise delay fixed values; determining the fault frequency of each of the plurality of line sections based on the respective delay fixed value of the plurality of line switches and the fault recording data of the target power distribution network; determining a unit failure rate of each of the plurality of line segments based on the failure frequency of each of the plurality of line segments and the line length of each of the plurality of line segments; determining a constant value adjustment strategy based on the unit fault rate of each of the plurality of line segments; and updating the initial relay protection fixed values of the plurality of line switches based on the fixed value adjustment strategy to obtain target relay protection fixed values of the plurality of line switches.

According to an embodiment of the present invention, the determining a constant value adjustment policy based on the unit failure rates of the plurality of line segments includes: obtaining a failure rate difference value for a first target link based on a unit failure rate of the first target link and a unit failure rate of a downstream link of the first target link, wherein the first target link belongs to the plurality of link; under the condition that the fault rate difference value is larger than a first threshold value, determining the fixed value adjustment strategy as a tripping switch forward movement strategy; and determining the fixed value adjustment strategy as a trip switch backward movement strategy under the condition that the fault rate difference value is smaller than a second threshold value.

According to an embodiment of the present invention, the method further includes: and determining the target relay protection setting value of each of the plurality of line switches as the initial relay protection setting value of each of the plurality of line switches when the fault rate difference value related to each of the plurality of line segments is greater than or equal to the second threshold and less than or equal to the first threshold.

According to an embodiment of the present invention, the updating the initial relay protection setting value of each of the plurality of line switches based on the setting value adjustment policy to obtain the target relay protection setting value of each of the plurality of line switches includes: determining a plurality of second target line segments to be adjusted from the plurality of line segments based on the unit failure rates of the respective plurality of line segments; determining a plurality of target line switches associated with the plurality of second target line segments based on the fixed value adjustment strategy; and updating the tripping configuration attribute values of the plurality of target line switches based on the fixed value adjustment strategy to obtain the target relay protection fixed values of the plurality of line switches.

According to an embodiment of the present invention, the plurality of line switches includes a plurality of trunk switches and a plurality of branch switches, and the initial relay protection constant value further includes a trip configuration attribute value; the method for dividing the target power distribution network into a plurality of line sections based on initial relay protection fixed values of each of a plurality of line switches included in the target power distribution network comprises the following steps: determining a plurality of target trunk switches from the plurality of trunk switches based on the trip configuration attribute values of the plurality of trunk switches; and dividing the target power distribution network into the plurality of line segments based on the respective positions of the plurality of target trunk switches and the respective positions of the plurality of branch switches.

According to an embodiment of the present invention, the determining, based on the delay fixed values of the plurality of line switches and the fault record data of the target power distribution network, the fault frequency of each of the plurality of line segments includes: for each of the line segments, determining trip delay information for the line segment based on a delay setting of a target backbone switch associated with the line segment; and determining a failure frequency of the line section based on the trip delay information and a plurality of pieces of failure duration data included in the failure recording data.

According to an embodiment of the present invention, the method further includes: and determining the line length of each of the plurality of line segments based on the positions of each of the plurality of target trunk switches and the positions of each of the plurality of branch switches.

According to an embodiment of the present invention, the method further includes: and performing relay protection configuration on the plurality of line switches based on the target relay protection fixed values of the plurality of line switches.

Another aspect of the present invention provides a relay protection fixed value configuration device for a power distribution network, including: the first processing module is used for dividing the target power distribution network into a plurality of line sections based on initial relay protection fixed values of a plurality of line switches included in the target power distribution network, wherein the initial relay protection fixed values comprise delay fixed values; the first determining module is used for determining the fault frequency of each of the plurality of line sections based on the respective delay fixed value of the plurality of line switches and the fault recording data of the target power distribution network; a second determining module configured to determine a unit failure rate of each of the plurality of line segments based on a failure frequency of each of the plurality of line segments and a line length of each of the plurality of line segments; a third determining module, configured to determine a constant value adjustment policy based on a unit failure rate of each of the plurality of line segments; and the updating module is used for updating the initial relay protection fixed value of each of the plurality of line switches based on the fixed value adjustment strategy to obtain the target relay protection fixed value of each of the plurality of line switches.

Another aspect of the present invention provides an electronic device, including: one or more processors; and a memory for storing one or more instructions that, when executed by the one or more processors, cause the one or more processors to implement the method as described above.

Another aspect of the invention provides a computer readable storage medium storing computer executable instructions that when executed are configured to implement a method as described above.

According to the embodiment of the invention, the plurality of line sections of the target power distribution network can be determined according to the initial relay protection fixed values of the plurality of line switches included in the target power distribution network, the fault recording data are utilized to determine the fault frequencies of the plurality of line sections, and the initial relay protection fixed values of the plurality of line switches are updated based on the fault frequencies of the plurality of line sections to obtain the target relay protection fixed values. Through the technical means, the relay protection fixed value of the target power distribution network can be adjusted by utilizing the fault recording data, so that the fault rate of each line section of the target power distribution network is balanced, the long-time impact on primary equipment caused by overlong fault removal time near a line outlet can be avoided, and meanwhile, the rapid action and the loss of branch protection of the main line protection action at the tail end of the line can be avoided.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 shows a flowchart of a method for configuring relay protection fixed values of a power distribution network according to an embodiment of the invention.

Fig. 2 shows a schematic diagram of a target distribution network before constant value adjustment according to an embodiment of the present invention.

Fig. 3 shows a flow diagram of a constant value adjustment policy determination method according to an embodiment of the invention.

Fig. 4 shows a schematic diagram of a target distribution network after constant value adjustment according to an embodiment of the present invention.

Fig. 5A shows a schematic diagram of a target distribution network before constant value adjustment according to another embodiment of the present invention.

Fig. 5B is a schematic diagram of a target distribution network after constant value adjustment according to another embodiment of the present invention.

Fig. 6 shows a block diagram of a relay protection constant value configuration device for a power distribution network according to an embodiment of the present invention.

Fig. 7 shows a block diagram of an electronic device adapted to implement a method for configuring relay protection settings of a power distribution network according to an embodiment of the invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprises," "comprising," and/or the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It should be noted that the terms used herein should be construed to have meanings consistent with the context of the present specification and should not be construed in an idealized or overly formal manner.

Where expressions like at least one of "A, B and C, etc. are used, the expressions should generally be interpreted in accordance with the meaning as commonly understood by those skilled in the art (e.g.," a system having at least one of A, B and C "shall include, but not be limited to, a system having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).

The remote control type feeder automatic control system is usually established by a computer monitoring network system and a communication network, and the most important device which must be adopted is a feeder terminal unit (Feeder Terminal Unit, FTU) with data collection and communication capabilities. The system can monitor the working conditions of the remote feeder sectionalizer and the tie switch in real time under the condition that the power grid is kept in a normal working condition, monitor corresponding feeder current and voltage changes, and can realize remote opening and closing control of the line switch. In addition, the system can extract fault records under fault conditions, and can also automatically diagnose and isolate fault areas on the feeder lines and recover normal power supply to non-fault areas.

Terminal set values of relay protection and centralized circuit switching station terminal units (Distribution Terminal Unit, DTU) of the power distribution network are set, and the coordination of current set values and time level differences is basically achieved. The relay protection of the main network is quite mature after years of development, the power distribution network is paid attention to and developed in recent years, and the complete equipment configuration and the distribution planning of the 10kV feeder automation line are determined more recently, so that most power distribution network professionals do not know the cooperation of the relay protection of the power distribution network and the terminal fixed value of the power distribution line, the terminal fixed value setting principle under each condition and the cooperation with the relay protection of the power distribution network are not clear, and therefore, a method capable of automatically calculating the FTU or DTU overcurrent protection is needed to guide the power distribution network professionals to develop the power distribution network protection fixed value setting.

In view of this, the embodiment of the invention provides a method for adjusting protection constant value of a power distribution network by utilizing fault recording data characteristics of the power distribution network, which avoids long-time impact on primary equipment caused by overlong fault removal time near a line outlet and simultaneously avoids rapid action and branch protection loss of coordination and selectivity of a main line protection action at the end of the line.

Specifically, the embodiment of the invention provides a distribution network relay protection constant value configuration method, a distribution network relay protection constant value configuration device, electronic equipment and a storage medium. The method comprises the following steps: dividing the target power distribution network into a plurality of line sections based on initial relay protection fixed values of each of a plurality of line switches included in the target power distribution network, wherein the initial relay protection fixed values comprise delay fixed values; determining respective fault frequencies of a plurality of line segments based on respective delay fixed values of the plurality of line switches and fault recording data of a target power distribution network; determining a unit fault rate of each of the plurality of line segments based on the fault frequency of each of the plurality of line segments and the line length of each of the plurality of line segments; determining a constant value adjustment strategy based on the unit fault rate of each of the plurality of line segments; and updating the initial relay protection fixed values of the plurality of line switches based on the fixed value adjustment strategy to obtain the target relay protection fixed values of the plurality of line switches.

In embodiments of the present invention, the data involved (e.g., including but not limited to user personal information) is collected, updated, analyzed, processed, used, transmitted, provided, disclosed, stored, etc., all in compliance with relevant legal regulations, used for legal purposes, and without violating the public welfare. In particular, necessary measures are taken for personal information of the user, illegal access to personal information data of the user is prevented, and personal information security, network security and national security of the user are maintained.

In embodiments of the present invention, the user's authorization or consent is obtained before the user's personal information is obtained or collected.

Fig. 1 shows a flowchart of a method for configuring relay protection fixed values of a power distribution network according to an embodiment of the invention.

As shown in FIG. 1, the method includes operations S101-S105.

In operation S101, the target power distribution network is divided into a plurality of line segments based on initial relay protection fixed values of each of a plurality of line switches included in the target power distribution network.

In operation S102, a failure frequency of each of the plurality of line segments is determined based on the respective delay fixed values of the plurality of line switches and the failure recording data of the target power distribution network.

In operation S103, a unit failure rate of each of the plurality of line segments is determined based on the failure frequency of each of the plurality of line segments and the line length of each of the plurality of line segments.

In operation S104, a constant value adjustment policy is determined based on the unit failure rates of the respective plurality of line segments.

In operation S105, based on the fixed value adjustment policy, the initial relay protection fixed values of the plurality of line switches are updated, and the target relay protection fixed values of the plurality of line switches are obtained.

According to an embodiment of the invention, the target distribution network may be used to connect a transmission network and an electric power customer. The target distribution network may include a main line and an unlimited number of branch lines, wherein an upstream end of the main line may be connected to a power transmission network, and each branch line may be connected to a consumer or a power transmission and distribution device of an electric power customer. The target configuration point may include a plurality of line switches, which may include a plurality of switches located on the trunk line, and a switch located on each branch line, respectively.

According to an embodiment of the present invention, the relay protection constant value of the line switch may include an overcurrent protection constant value, a delay constant value, and an attribute value of whether to be a trip switch. When the attribute value indicates that the line switch is used as a tripping switch, the line switch can be used as an overcurrent protection device, and when the current of the acquired line is greater than the overcurrent protection fixed value, the line where the line switch is positioned is disconnected after the delay fixed value. The initial relay protection fixed value of the line switch is the relay protection fixed value before fixed value configuration.

According to the embodiment of the invention, the target power distribution network can be divided into a plurality of line segments based on the positions of the line switches which are trip switches in the plurality of line switches, namely, the line between every two trip switches can be used as one line segment.

According to the embodiment of the invention, the fault wave recording data can be acquired by a fault wave recorder in the target power distribution network. The fault recorder is used for the power system, can automatically and accurately record the change conditions of various electric quantities in the processes before and after the fault when the system is in fault, and has important functions of analyzing, comparing, analyzing and processing accidents, judging whether the protection is in correct action and improving the safe operation level of the power system.

According to an embodiment of the invention, the fault log data may include fault duration data for each fault. The fault duration of each fault may fluctuate within a range determined based on the respective delay settings of the plurality of line switches. The line switch associated with the line segment may be a line switch located at an upstream end of the line segment, whereby the delay setting associated with the line segment may be determined based on the delay setting of the line switch. Thus, for each line segment, the failure frequency of the line segment can be determined according to the data amount of the failure duration data close to the delay fixed value of the line segment in the failure recording data.

According to an embodiment of the present invention, the unit failure rate may be expressed as the number of failures per unit line length of the line segment.

According to an embodiment of the present invention, the adjustment of the relay protection setting based on the setting adjustment policy may include determining the line switches to be adjusted, and a specific way of adjusting the relay protection setting of the line switches, including initializing the relay protection setting of one line switch, or using the relay protection setting of one line switch to cover the relay protection setting of another line switch, etc.

According to the embodiment of the invention, the plurality of line sections of the target power distribution network can be determined according to the initial relay protection fixed values of the plurality of line switches included in the target power distribution network, the fault recording data are utilized to determine the fault frequencies of the plurality of line sections, and the initial relay protection fixed values of the plurality of line switches are updated based on the fault frequencies of the plurality of line sections to obtain the target relay protection fixed values. Through the technical means, the relay protection fixed value of the target power distribution network can be adjusted by utilizing the fault recording data, so that the fault rate of each line section of the target power distribution network is balanced, the long-time impact on primary equipment caused by overlong fault removal time near a line outlet can be avoided, and meanwhile, the rapid action and the loss of branch protection of the main line protection action at the tail end of the line can be avoided.

The method shown in fig. 1 is further described with reference to fig. 2-4, 5A and 5B in conjunction with the specific embodiments.

According to an embodiment of the present invention, the plurality of line switches may include a plurality of trunk switches and a plurality of branch switches. The plurality of trunk switches can be uniformly distributed on the trunk line of the target power distribution network, the plurality of branch switches can be respectively distributed on each branch line of the target power distribution network, and optionally, one branch switch can be configured at the connecting end of each branch line and the trunk line. Relay protection settings may include trip configuration attribute values, current settings, and delay settings. The trip configuration attribute value may be configured as "yes" or "no". In the case that the trip configuration attribute value is configured to "yes", this indicates that the line switch can be used as a trip switch. Accordingly, in the case that the trip configuration attribute value is configured as "no", it means that the line switch is not used as a trip switch. The trunk switch located at the junction of the target power distribution network and the power transmission network of the plurality of trunk switches can be used as a transformer substation switch. The substation switch and the plurality of branch switches may be constantly used as trip switches, i.e. the trip configuration property values in the relay protection settings of the substation switch and the plurality of branch switches may be constantly set to values representing the setting as trip switches. Each trip switch may control the opening and closing of a downstream line from the trip switch. For example, after a substation switch is opened, the target distribution network as a whole may be in an open state. After one branch switch of the target distribution network is opened, the branch line associated with that branch switch may be in an open state.

According to the embodiment of the invention, the downstream line length of each of the plurality of line switches can be determined in the design stage and/or the construction stage of the target power distribution network, that is, the downstream line length of each of the plurality of line switches can be a fixed value when the configuration and adjustment of the relay protection fixed value are performed. For a backbone switch that is not configured as a trip switch, i.e., a backbone switch whose trip configuration attribute value is represented as "no," its current and delay constant values may be configured as null values. For a line switch configured as a trip switch, the current constant may be configured based on specifications of the line switch in a practical application scenario, or a load condition in a line controlled by the line switch.

According to an embodiment of the present invention, the target distribution network may be divided into a plurality of line segments according to the number of line switches configured as trip switches in the line. Specifically, a plurality of target backbone switches may be determined from the plurality of backbone switches based on the trip configuration attribute values of the respective plurality of backbone switches; and dividing the target power distribution network into a plurality of line segments based on the respective positions of the plurality of target trunk switches and the respective positions of the plurality of branch switches.

According to an embodiment of the present invention, the target backbone switch is a backbone switch configured as a trip switch.

According to an embodiment of the present invention, the plurality of line segments may include a plurality of trunk segments divided by the trunk line and branch line segments constituted by the respective branch lines. The trunk section may be controlled by a trunk switch located upstream of the trunk section.

According to an embodiment of the invention, the plurality of line segments may implement relay protection based on a multi-level time horizon, i.e. each line segment may be assigned a respective time horizon. Specifically, for a line segment on a branch line, since a single branch line may contain only one branch line segment, the time range progression of the line segment on the branch line may be 1-level. For a trunk line, the time-level number of the trunk line section may be determined based on the position of the trunk line section in the trunk line, for example, for a line section located at the end of the trunk line, the time-level number may be 1 level. For another example, for a line segment of a substation switch control, its time-critical technique may be N stages, where N may represent the number of line segments on the main line.

According to an embodiment of the present invention, the delay fixed value of the line switch may be determined according to the number of stages of the line section controlled by the delay fixed value, as shown in formula (1):

；

in the formula (1), t may represent a time difference between time offsets of adjacent stages, and t (n) may represent a delay fixed value of a line switch having a time offset of n stages.

According to an embodiment of the present invention, initial relay protection setting values of each of the plurality of line switches may be as shown in table 1. The initial relay protection fixed value of each of the plurality of line switches can be expressed as a current configuration state of the target power distribution network, and in the current configuration state, the substation switch ks, the trunk switch k2, the trunk switch k5, the branch switch f1 and the branch switch f2 can be used as tripping switches. The time difference between each level of time limit of the target distribution network may be 0.2s. The number of time steps of the line segments controlled by the branch switch f1 and the branch switch f2 may be 1, and the delay fixed values of the branch switch f1 and the branch switch f2 may be set to 0. The number of time steps of the line section controlled by the trunk switch k5 may be 1, and the delay constant value of the trunk switch k5 may be set to 0. The number of time steps of the line section controlled by the trunk switch k2 may be 2, and the delay constant value of the trunk switch k2 may be set to 0.2s. The number of time pole difference stages of the line section controlled by the substation switch ks may be 3, and the delay fixed value of the substation switch ks may be set to 0.4s.

Fig. 2 shows a schematic diagram of a target distribution network before constant value adjustment according to an embodiment of the present invention.

As shown in fig. 2, the target distribution network may include a substation switch ks, a trunk switch k1, a trunk switch k2, a trunk switch k3, a trunk switch k4, a trunk switch k5, a trunk switch k6, a branch switch f1, and a branch switch f2. The relay protection setting values of the line switch can be shown in table 1.

According to an embodiment of the present invention, a line segment associated with a line switch may be represented as a line segment that is solely controlled by the line switch. In particular, the line sections associated with the substation switch ks may be a line section L1 and a line section L2; the line segments associated with the backbone switch k2 may be a line segment L3, a line segment L4, and a line segment L5; the line segments associated with the backbone switch k5 may be a line segment L6 and a line segment L7; the line segment associated with the branch switch f1 may be the line segment L8; the line segment associated with the branch switch f2 may be the line segment L9.

According to the embodiment of the invention, after the target power distribution network is divided into a plurality of line sections, the plurality of line sections can be divided into line sections with extremely poor multi-stage time according to the delay fixed value of the line switch. For example, with respect to the trunk switch k5, the branch switch f1, and the branch switch f2, since the delay fixed values thereof are all 0, it can be considered that the line segment related to the trunk switch k5, the line segment related to the branch switch f1, and the line segment related to the branch switch f2 are line segments with a level 1 time difference, that is, the line segment L6, the line segment L7, the line segment L8, and the line segment L9. Accordingly, the line segments associated with the backbone switch k2 may be line segments of 2-stage extremely bad time, i.e., line segment L3, line segment L4, and line segment L5. The line segments associated with substation switch ks may be line segments of level 3 time horizon, i.e., line segment L1 and line segment L2.

According to the embodiment of the invention, the line length of each of the plurality of line sections can be determined based on the positions of each of the plurality of target trunk switches and the positions of each of the plurality of branch switches. The plurality of line segments may refer to line segments having extremely poor multi-level time. Specifically, the range of the line segments included in the line segment with the extremely poor time of each stage may be determined according to the respective positions of the plurality of target trunk switches and the respective positions of the plurality of branch switches, so as to determine the respective line lengths of the line segments with the extremely poor time of each stage. For example, as can be seen from table 1 and fig. 2, the line length of the line segment with the level 1 time difference may be expressed as lf1+lf2+lk5, the line length of the line segment with the level 2 time difference may be expressed as Lk2-Lk5, and the line length of the line segment with the level 3 time difference may be expressed as Ls-Lk2.

According to the embodiment of the invention, the target power distribution network can generate multiple faults when in operation, and each fault can be recorded by a fault recorder. The fault record data recorded by the fault recorder can be data of a queue structure with a fixed length, and the data is updated according to the first-in first-out principle. That is, the data amount of the fault data recorded in the fault recording data may be fixed, and after the new fault data is generated, the fault data recorded earliest in the fault recording data may be deleted and the new fault data is recorded.

According to an embodiment of the present invention, optionally, the fault occurring in the target power distribution network may include a transient fault and a non-transient fault, and for the non-transient fault, the fault recorder may record fault data of the non-transient fault in a data structure other than the fault recording data. Namely, fault data recorded in the fault recording data are all fault data generated when transient faults occur.

According to an embodiment of the present invention, determining the failure frequency of each of the plurality of line segments based on the respective delay fixed values of the plurality of line switches and the failure recording data of the target power distribution network may include the following operations: for each line segment, determining trip delay information for the line segment based on a delay value of a target backbone switch associated with the line segment; and determining a failure frequency of the line section based on the trip delay information and the plurality of pieces of failure duration data included in the failure recording data.

According to an embodiment of the present invention, when a transient fault occurs, the fault duration recorded in the fault record data may be approximately equal to the sum of the opening time and the delay fixed value of the line switch, as shown in formula (2):

；

in equation (2), T (n) may represent the theoretical fault duration of a line segment with n-level time difference, and τ may represent the opening time of the line switch.

According to an embodiment of the invention, the actual fault duration recorded in the fault record data may fluctuate within a certain range of theoretical fault durations, i.e. a fluctuation range may be determined based on the theoretical fault duration. For a plurality of pieces of fault duration data included in the fault recording data, the data amount of the pieces of data of which the fault duration data fall into the fluctuation range can be counted to obtain the fault frequency of the line section corresponding to the fluctuation range.

According to the embodiment of the invention, after determining the failure frequency and the line length of each of the plurality of line segments, the unit failure rate of each of the plurality of line segments may be determined, as shown in formula (3):

；

in equation (3), ratio (n) may represent a unit failure rate of the line segment of n-level time difference, num (n) may represent a failure frequency of the line segment of n-level time difference, and L (n) may represent a line length of the line segment of n-level time difference.

According to an embodiment of the present invention, a constant value adjustment policy may be determined based on the unit failure rates of each of the plurality of line segments. Specifically, for a first target link, a failure rate difference value is obtained based on a unit failure rate of the first target link and a unit failure rate of a downstream link of the first target link, wherein the first target link belongs to a plurality of link segments; under the condition that the fault rate difference value is larger than a first threshold value, determining a fixed value adjustment strategy as a tripping switch forward movement strategy; and determining the fixed value adjustment strategy as a trip switch backward movement strategy under the condition that the fault rate difference value is smaller than a second threshold value.

According to the embodiment of the invention, the unit fault rates of the plurality of line segments can be compared sequentially from the upstream to the downstream of the target power distribution network, namely, the unit fault rate of the line segment with the extremely poor N-level time is compared with the unit fault rate of the line segment with the extremely poor N-1 level time, then the unit fault rate of the line segment with the extremely poor N-1 level time is compared with the unit fault rate of the line segment with the extremely poor N-2 level time, and finally the unit fault rate of the line segment with the extremely poor 2 level time is compared with the unit fault rate of the line segment with the extremely poor 1 level time. I.e. for a line segment with a poor N-level time, the downstream line segment is a line segment with a poor N-1 level time.

According to the embodiment of the invention, the unit fault rate of the line section and the unit fault rate of the downstream line section of the line section can be subtracted to obtain a fault rate difference value.

According to the embodiment of the invention, the first threshold value and the second threshold value can be set according to specific application scenes. Alternatively, the first threshold may be set to a small positive number, e.g., set to 0.1, etc., and the second threshold may be set to a small negative number, e.g., set to-0.1, etc.

According to the embodiment of the invention, in each comparison process, if the fault rate difference value is larger than the first threshold value or smaller than the second threshold value, a fixed value adjustment strategy can be obtained, and the subsequent comparison flow is ended.

Fig. 3 shows a flow diagram of a constant value adjustment policy determination method according to an embodiment of the invention.

As shown in FIG. 3, the method includes operations S301-S309.

In operation S301, the number of stages N of the initialization time range is N.

In operation S302, it is determined whether n is greater than 1. In the case where n is determined to be less than or equal to 1, operation S303 is performed. In the case where n is determined to be greater than 1, operation S304 is performed.

In operation S303, it is determined that the constant value adjustment policy is to maintain the constant value.

In operation S304, the unit failure rate of the line segment with the n-level time limit is subtracted from the unit failure rate of the line segment with the n-1 level time limit to obtain a failure rate difference.

In operation S305, it is determined whether the failure rate difference is greater than a first threshold. In case it is determined that the failure rate difference is greater than the first threshold, operation S306 is performed. In the case where it is determined that the failure rate difference value is less than or equal to the first threshold value, operation S307 is performed.

In operation S306, a constant value adjustment strategy is determined as a trip switch advance strategy.

In operation S307, it is determined whether the failure rate difference is smaller than a second threshold. In case it is determined that the failure rate difference value is smaller than the second threshold value, operation S308 is performed. In the case where it is determined that the failure rate difference is greater than or equal to the first threshold, operation S309 is performed.

In operation S308, it is determined that the constant value adjustment strategy is a trip switch backward movement strategy.

In operation S309, n is set to n-1. After the operation S309 is completed, the execution operation S302 is returned.

After completion of operation S303, operation S306, or operation S308, the flow of the constant value adjustment policy determination method ends.

According to an embodiment of the present invention, in the case where n is less than or equal to 1, that is, indicates that the failure rate differences associated with each of the plurality of line segments are each greater than or equal to the second threshold value and less than or equal to the first threshold value. And under the condition that the fault rate difference value related to each of the plurality of line sections is larger than or equal to the second threshold value and smaller than or equal to the first threshold value, determining the constant value adjustment strategy as maintaining the constant value, namely determining the target relay protection constant value of each of the plurality of line switches as the initial relay protection constant value of each of the plurality of line switches.

According to the embodiment of the invention, the initial relay protection fixed value of each of the plurality of line switches can be updated based on the fixed value adjustment strategy, so that the target relay protection fixed value of each of the plurality of line switches is obtained. Specifically, a plurality of second target line segments to be adjusted may be determined from the plurality of line segments based on the unit failure rates of the respective plurality of line segments; determining a plurality of target line switches associated with a plurality of second target line segments based on a constant value adjustment strategy; and updating the tripping configuration attribute values of the plurality of target line switches based on the fixed value adjustment strategy to obtain the target relay protection fixed values of the plurality of line switches.

According to an embodiment of the invention, for example, the failure rate difference between the line segment with the n-level time difference and the line segment with the n-1 level time difference is greater than the first threshold or less than the second threshold. The line segment with the n-1 level time difference to the line segment with the 1 level time difference are all the second target line segment to be adjusted.

According to an embodiment of the present invention, the trip switch advance strategy may be to assign a relay protection setting value of a line switch associated with the second target line segment to a previous line switch of the line switch and initialize the relay protection setting value of the line switch associated with the second target line segment. That is, when the fixed value adjustment strategy is the trip switch advance strategy, the target line switch that can be determined is the line switch associated with the second target line segment and the line switch immediately preceding the line switch associated with the second target line segment.

In accordance with an embodiment of the present invention, accordingly, the trip switch back-shift strategy may be to assign a relay protection setting value of a line switch associated with a second target line segment to a subsequent line switch of the line switch and initialize the relay protection setting value of the line switch associated with the second target line segment. That is, when the fixed value adjustment strategy is the trip switch back-shift strategy, the target line switch that can be determined is the line switch associated with the second target line segment and the line switch that is the line switch associated with the second target line segment.

For example, in the target distribution network as shown in fig. 2, the first threshold may be set to 0.1, the second threshold may be set to-0.1,3 level-time-poor line segment length L (3) =3 km, level-2-time-poor line segment length L (2) =4 km, level-1-time-poor line segment length L (1) =5 km, and fault record data may be as shown in table 2.

According to the embodiment of the present invention, it can be determined based on table 2 that the failure frequency of the line segment with the 3-stage time extremely poor is 3, and the unit failure rate thereof is 1; the fault frequency of the line section with the extremely poor 2-level time is 4, and the unit fault rate is 1; the failure frequency of the line segment with the extremely poor level 1 time is 13, and the unit failure rate is 2.6.

According to an embodiment of the invention, each line segment is subtracted from the unit failure rate of the line segment downstream of the line segment in turn to obtain a failure rate difference. The difference between the failure rates of the line segment with the level 3 time limit and the line segment with the level 2 time limit is 1-1=0, and the difference between the failure rates is greater than or equal to the second threshold value and less than or equal to the first threshold value, so that it can be determined that the relay protection setting value does not need to be adjusted from the line segment with the level 2 time limit. The difference of the fault rates of the line section with the level 2 time limit and the line section with the level 1 time limit is 1-2.6= -1.6, and the difference of the fault rates is smaller than the second threshold, so that the line section with the level 1 time limit and the downstream line section thereof need to be subjected to adjustment of relay protection fixed values according to a tripping switch backward movement strategy. Since the line segment with the level 1 time limit has no downstream line segment and the branch line segment included in the line segment with the level 1 time limit has no additional branch switch, the trunk switch, i.e., the trunk switch k5 and the trunk switch k6, in the target line switch related to the line segment with the level 1 time limit only needs to be adjusted in relay protection setting.

According to the embodiment of the invention, after the relay protection constant value is adjusted, the obtained target relay protection constant values of the plurality of line switches can be shown in table 3.

According to the embodiment of the invention, relay protection fixed values of the trunk switch k5 and the trunk switch k6 are adjusted based on the tripping switch backward strategy, so that the range of the line section with the extremely poor 1-stage time is reduced, and the faults generated by the line section between the trunk switch k5 and the trunk switch k6 are converted to be responded by the trunk switch k2, thereby reducing the fault rate of the line section with the extremely poor 1-stage time, enabling the tripping delay of the switch to be close to balance, and reducing the impact of the faults on primary equipment.

According to the embodiment of the invention, after the relay protection fixed values of the plurality of line switches are adjusted, the relay protection configuration can be carried out on the plurality of line switches so as to realize the installation of the relay protection fixed values. The relay protection configuration may, for example, control the devices such as a breaker and a recloser at the trunk switch k5 to enter a stop state and control the devices such as the breaker and the recloser at the trunk switch k6 to enter an enable state through a control signal. The relay protection configuration method can be set according to specific application scenarios, and is not limited herein.

Fig. 4 shows a schematic diagram of a target distribution network after constant value adjustment according to an embodiment of the present invention.

As shown in fig. 4, after the fixed value adjustment, the line segment with the 3-stage time limit may include a line segment L1 and a line segment L2; the line segments with the level 2 time difference may include a line segment L3, a line segment L4, a line segment L5, and a line segment L6; the line segments with the extremely poor level 1 time may include a line segment L7, a line segment L8, and a line segment L9.

According to an embodiment of the present invention, as an alternative implementation manner, the branch line of the target power distribution network may also include a plurality of branch switches. In the constant value adjustment, the branch line may be adjusted based on a similar manner to the main line.

Fig. 5A shows a schematic diagram of a target distribution network before constant value adjustment according to another embodiment of the present invention.

As shown in fig. 5A, the target power distribution network may include a substation switch ks, a trunk switch k1, a trunk switch k2, a trunk switch k3, a trunk switch k4, a trunk switch k5, a trunk switch k6, a branch switch f1, a branch switch f2, a branch switch f3, and a branch switch f4. Substation switch ks, trunk switch k1, trunk switch k2, trunk switch k3, trunk switch k4, trunk switch k5, and trunk switch k6 may be located in a trunk line of the target power distribution network, branch switch f1 may be located in a first branch line of the target power distribution network, and branch switch f2, branch switch f3, and branch switch f4 may be located in a second branch line of the target power distribution network.

According to the embodiment of the invention, before constant value adjustment, a substation switch ks, a trunk switch k2, a trunk switch k5, a branch switch f1 and a branch switch f2 of the target power distribution network can be used as tripping switches. Accordingly, the line segment with the level 3 extremely poor time may include a line segment L1 and a line segment L2; the line segments with the level 2 time difference may include a line segment L3, a line segment L4, and a line segment L5; the line segments with the extremely poor level 1 time may include line segment L6, line segment L7, line segment L8, line segment L9, line segment L10, and line segment L11.

According to the embodiment of the invention, similarly to the above example, based on the fault recording data of the target power distribution network, the relay protection constant value needs to be adjusted for the line segment with the extremely poor level 1 time and the downstream line segment thereof according to the trip switch backward movement strategy. At this time, since the line segment with the stage 1 extremely poor time has no downstream line segment, the branch line segment included in the line segment with the stage 1 extremely poor time has the additional branch switch f3 and the branch switch f4, and thus, adjustment of relay protection setting values for the trunk switch k5, the trunk switch k6, the branch switch f2, and the branch switch f3 is required.

Fig. 5B is a schematic diagram of a target distribution network after constant value adjustment according to another embodiment of the present invention.

As shown in fig. 5B, after the fixed value adjustment, the substation switch ks, the trunk switch k2, the trunk switch k6, the branch switch f1, and the branch switch f3 of the target power distribution network may be used as trip switches. Accordingly, the line segment with the level 3 extremely poor time may include a line segment L1 and a line segment L2; the line segments with the level 2 time limit may include a line segment L3, a line segment L4, a line segment L5, a line segment L6, and a line segment L9; the line segments with the extremely poor level 1 time may include a line segment L7, a line segment L8, a line segment L10, and a line segment L11.

Fig. 6 shows a block diagram of a relay protection constant value configuration device for a power distribution network according to an embodiment of the present invention.

As shown in fig. 6, the power distribution network relay protection setting configuration apparatus 600 includes a first processing module 610, a first determining module 620, a second determining module 630, a third determining module 640, and an updating module 650.

The first processing module 610 is configured to divide the target power distribution network into a plurality of line segments based on initial relay protection fixed values of each of a plurality of line switches included in the target power distribution network, where the initial relay protection fixed values include delay fixed values.

The first determining module 620 is configured to determine a failure frequency of each of the plurality of line segments based on the respective delay fixed values of the plurality of line switches and the failure recording data of the target power distribution network.

The second determining module 630 is configured to determine a unit failure rate of each of the plurality of line segments based on the failure frequency of each of the plurality of line segments and the line length of each of the plurality of line segments.

A third determining module 640 is configured to determine a constant value adjustment policy based on the unit failure rates of the plurality of line segments.

And the updating module 650 is configured to update the initial relay protection fixed values of the plurality of line switches based on the fixed value adjustment policy, so as to obtain the target relay protection fixed values of the plurality of line switches.

According to an embodiment of the present invention, the third determining module 640 includes a first determining unit, a second determining unit, and a third determining unit.

And a first determination unit configured to obtain, for a first target link, a failure rate difference value based on a unit failure rate of the first target link and a unit failure rate of a downstream link of the first target link, wherein the first target link belongs to a plurality of link segments.

And the second determining unit is used for determining the fixed value adjustment strategy as the tripping switch forward movement strategy under the condition that the fault rate difference value is larger than the first threshold value.

And the third determining unit is used for determining the fixed value adjustment strategy as the trip switch backward movement strategy under the condition that the fault rate difference value is smaller than the second threshold value.

According to an embodiment of the invention, the third determination module 640 further comprises a fourth determination unit.

And the fourth determining unit is used for determining that the target relay protection constant value of each of the plurality of line switches is the initial relay protection constant value of each of the plurality of line switches under the condition that the fault rate difference value related to each of the plurality of line segments is larger than or equal to the second threshold value and smaller than or equal to the first threshold value.

According to an embodiment of the present invention, the update module 650 includes a first update unit, a second update unit, and a third update unit.

And a first updating unit for determining a plurality of second target line segments to be adjusted from the plurality of line segments based on the unit failure rates of the respective plurality of line segments.

And a second updating unit for determining a plurality of target line switches associated with a plurality of second target line segments based on the fixed value adjustment strategy.

And the third updating unit is used for updating the tripping configuration attribute values of the plurality of target line switches based on the fixed value adjustment strategy to obtain the target relay protection fixed values of the plurality of line switches.

According to an embodiment of the present invention, the plurality of line switches includes a plurality of trunk switches and a plurality of branch switches, and the initial relay protection setting further includes a trip configuration attribute value.

According to an embodiment of the present invention, the first processing module 610 includes a first processing unit and a second processing unit.

And the first processing unit is used for determining a plurality of target trunk switches from the trunk switches based on the tripping configuration attribute values of the trunk switches.

And the second processing unit is used for dividing the target power distribution network into a plurality of line segments based on the positions of the target trunk switches and the positions of the branch switches.

According to an embodiment of the present invention, the first determination module 620 includes a fourth determination unit and a fifth determination unit.

And a fourth determining unit for determining trip delay information of the line section based on the delay fixed value of the target trunk switch related to the line section for each line section.

And a fifth determining unit for determining the failure frequency of the line section based on the trip delay information and the pieces of failure duration data included in the failure recording data.

According to an embodiment of the present invention, the power distribution network relay protection constant value configuration device 600 further includes a fourth determining module.

And a fourth determining module, configured to determine a line length of each of the plurality of line segments based on the positions of each of the plurality of target trunk switches and the positions of each of the plurality of branch switches.

According to an embodiment of the present invention, the power distribution network relay protection constant value configuration device 600 further includes a second processing module.

And the second processing module is used for carrying out relay protection configuration on the plurality of line switches based on the target relay protection fixed values of the plurality of line switches.

Any number of the modules, sub-modules, units, sub-units, or at least part of the functionality of any number of the sub-units according to embodiments of the invention may be implemented in one module. Any one or more of the modules, sub-modules, units, sub-units according to embodiments of the present invention may be implemented as a split into multiple modules. Any one or more of the modules, sub-modules, units, sub-units according to embodiments of the invention may be implemented at least in part as hardware circuitry, such as a Field Programmable Gate Array (FPGA), programmable Logic Array (PLA), system-on-chip, system-on-substrate, system-on-package, application Specific Integrated Circuit (ASIC), or in hardware or firmware in any other reasonable manner of integrating or packaging circuitry, or in any one of, or in any suitable combination of, software, hardware, and firmware. Alternatively, one or more of the modules, sub-modules, units, sub-units according to embodiments of the invention may be at least partly implemented as computer program modules, which, when run, may perform the respective functions.

For example, any of the first processing module 610, the first determining module 620, the second determining module 630, the third determining module 640, and the updating module 650 may be combined in one module/unit/sub-unit or any of the modules/units/sub-units may be split into a plurality of modules/units/sub-units. Alternatively, at least some of the functionality of one or more of these modules/units/sub-units may be combined with at least some of the functionality of other modules/units/sub-units and implemented in one module/unit/sub-unit. According to an embodiment of the present invention, at least one of the first processing module 610, the first determination module 620, the second determination module 630, the third determination module 640, and the update module 650 may be implemented at least in part as hardware circuitry, such as a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), a system on a chip, a system on a substrate, a system on a package, an Application Specific Integrated Circuit (ASIC), or as hardware or firmware in any other reasonable manner of integrating or packaging the circuitry, or as any one of or a suitable combination of any of the three. Alternatively, at least one of the first processing module 610, the first determination module 620, the second determination module 630, the third determination module 640, and the update module 650 may be at least partially implemented as computer program modules that, when executed, perform the corresponding functions.

It should be noted that, in the embodiment of the present invention, the power distribution network relay protection fixed value configuration device portion corresponds to the power distribution network relay protection fixed value configuration method portion in the embodiment of the present invention, and the description of the power distribution network relay protection fixed value configuration device portion specifically refers to the power distribution network relay protection fixed value configuration method portion, which is not described herein again.

Fig. 7 shows a block diagram of an electronic device adapted to implement a method for configuring relay protection settings of a power distribution network according to an embodiment of the invention. The electronic device shown in fig. 7 is only an example and should not be construed as limiting the functionality and scope of use of the embodiments of the invention.

As shown in fig. 7, the computer electronic device 700 according to the embodiment of the present invention includes a processor 701 that can perform various appropriate actions and processes according to a program stored in a read-only memory, i.e., a ROM 702, or a program loaded from a storage section 708 into a random access memory, i.e., a RAM 703. The processor 701 may include, for example, a general purpose microprocessor (e.g., a CPU), an instruction set processor and/or an associated chipset and/or a special purpose microprocessor (e.g., an Application Specific Integrated Circuit (ASIC)), or the like. The processor 701 may also include on-board memory for caching purposes. The processor 701 may comprise a single processing unit or a plurality of processing units for performing different actions of the method flow according to an embodiment of the invention.

In the RAM 703, various programs and data necessary for the operation of the electronic apparatus 700 are stored. The processor 701, the ROM 702, and the RAM 703 are connected to each other through a bus 704. The processor 701 performs various operations of the method flow according to an embodiment of the present invention by executing programs in the ROM 702 and/or the RAM 703. Note that the program may be stored in one or more memories other than the ROM 702 and the RAM 703. The processor 701 may also perform various operations of the method flow according to embodiments of the present invention by executing programs stored in the one or more memories.

According to an embodiment of the invention, the electronic device 700 may further comprise an input/output interface, i.e. an I/O interface 705, the I/O interface 705 also being connected to the bus 704. The electronic device 700 may also include one or more of the following components connected to the I/O interface 705: an input section 706 including a keyboard, a mouse, and the like; an output portion 707 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, a speaker, and the like; a storage section 708 including a hard disk or the like; and a communication section 709 including a network interface card such as a LAN card, a modem, or the like. The communication section 709 performs communication processing via a network such as the internet. The drive 710 is also connected to the I/O interface 705 as needed. A removable medium 711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 710 as necessary, so that a computer program read therefrom is mounted into the storage section 708 as necessary.

According to an embodiment of the present invention, the method flow according to an embodiment of the present invention may be implemented as a computer software program. For example, embodiments of the present invention include a computer program product comprising a computer program embodied on a computer readable storage medium, the computer program comprising program code for performing the method shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network via the communication portion 709, and/or installed from the removable medium 711. The above-described functions defined in the system of the embodiment of the present invention are performed when the computer program is executed by the processor 701. The systems, devices, apparatus, modules, units, etc. described above may be implemented by computer program modules according to embodiments of the invention.

The present invention also provides a computer-readable storage medium that may be embodied in the apparatus/device/system described in the above embodiments; or may exist alone without being assembled into the apparatus/device/system. The computer-readable storage medium carries one or more programs which, when executed, implement methods in accordance with embodiments of the present invention.

According to an embodiment of the present invention, the computer-readable storage medium may be a nonvolatile computer-readable storage medium. Examples may include, but are not limited to: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

For example, according to an embodiment of the invention, the computer-readable storage medium may include ROM 702 and/or RAM 703 and/or one or more memories other than ROM 702 and RAM 703 described above.

The embodiment of the invention also comprises a computer program product, which comprises a computer program, wherein the computer program comprises program codes for executing the method provided by the embodiment of the invention, and the program codes are used for enabling the electronic equipment to realize the method for configuring the relay protection constant value of the power distribution network provided by the embodiment of the invention when the computer program product runs on the electronic equipment.

The above-described functions defined in the system/apparatus of the embodiment of the present invention are performed when the computer program is executed by the processor 701. The systems, apparatus, modules, units, etc. described above may be implemented by computer program modules according to embodiments of the invention.

In one embodiment, the computer program may be based on a tangible storage medium such as an optical storage device, a magnetic storage device, or the like. In another embodiment, the computer program may also be transmitted, distributed over a network medium in the form of signals, downloaded and installed via the communication section 709, and/or installed from the removable medium 711. The computer program may include program code that may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.

According to embodiments of the present invention, program code for carrying out computer programs provided by embodiments of the present invention may be written in any combination of one or more programming languages, and in particular, such computer programs may be implemented in high-level procedural and/or object-oriented programming languages, and/or in assembly/machine languages. Programming languages include, but are not limited to, such as Java, c++, python, "C" or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. Those skilled in the art will appreciate that the features recited in the various embodiments of the invention and/or in the claims may be combined in various combinations and/or combinations even if such combinations or combinations are not explicitly recited in the invention. In particular, the features recited in the various embodiments of the invention and/or in the claims can be combined in various combinations and/or combinations without departing from the spirit and teachings of the invention. All such combinations and/or combinations fall within the scope of the invention.

The embodiments of the present invention are described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Although the embodiments are described above separately, this does not mean that the measures in the embodiments cannot be used advantageously in combination. The scope of the invention is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be made by those skilled in the art without departing from the scope of the invention, and such alternatives and modifications are intended to fall within the scope of the invention.

Claims (11)

1. The utility model provides a distribution network relay protection definite value configuration method which is characterized in that the method comprises the following steps:

dividing a target power distribution network into a plurality of line sections based on initial relay protection fixed values of a plurality of line switches included in the target power distribution network, wherein the initial relay protection fixed values comprise delay fixed values;

determining respective fault frequencies of the plurality of line sections based on respective delay fixed values of the plurality of line switches and fault recording data of the target power distribution network;

determining a unit failure rate of each of the plurality of line segments based on the failure frequency of each of the plurality of line segments and the line length of each of the plurality of line segments;

Determining a constant value adjustment strategy based on the unit fault rate of each of the plurality of line segments; and

and updating the initial relay protection fixed values of the plurality of line switches based on the fixed value adjustment strategy to obtain target relay protection fixed values of the plurality of line switches.

2. The method of claim 1, wherein the determining a constant value adjustment strategy based on the unit failure rate of each of the plurality of line segments comprises:

for a first target link, deriving a failure rate difference value based on a unit failure rate of the first target link and a unit failure rate of a downstream link of the first target link, wherein the first target link belongs to the plurality of link segments;

under the condition that the fault rate difference value is larger than a first threshold value, determining the fixed value adjustment strategy as a tripping switch forward movement strategy; and

and under the condition that the fault rate difference value is smaller than a second threshold value, determining the fixed value adjustment strategy as a tripping switch backward movement strategy.

3. The method as recited in claim 2, further comprising:

and determining the target relay protection setting value of each of the plurality of line switches as the initial relay protection setting value of each of the plurality of line switches under the condition that the fault rate difference value related to each of the plurality of line segments is larger than or equal to the second threshold value and smaller than or equal to the first threshold value.

4. The method of claim 1, wherein updating the initial relay protection settings for each of the plurality of line switches based on the setting adjustment policy to obtain the target relay protection settings for each of the plurality of line switches comprises:

determining a plurality of second target line segments to be adjusted from the plurality of line segments based on the unit failure rates of the respective plurality of line segments;

determining a plurality of target line switches associated with the plurality of second target line segments based on the constant value adjustment strategy; and

and updating the respective tripping configuration attribute values of the plurality of target line switches based on the fixed value adjustment strategy to obtain respective target relay protection fixed values of the plurality of line switches.

5. The method of claim 1, wherein the plurality of line switches comprises a plurality of trunk switches and a plurality of branch switches, the initial relay protection setting further comprising a trip configuration attribute value;

the method for dividing the target power distribution network into a plurality of line sections based on initial relay protection fixed values of each of a plurality of line switches included in the target power distribution network comprises the following steps:

determining a plurality of target backbone switches from the plurality of backbone switches based on the trip configuration attribute values of each of the plurality of backbone switches; and

The target distribution network is divided into the plurality of line segments based on the respective positions of the plurality of target trunk switches and the respective positions of the plurality of branch switches.

6. The method of claim 5, wherein determining the frequency of failure for each of the plurality of line segments based on the respective delay fixed values for the plurality of line switches and the failure logging data for the target power distribution network comprises:

for each of the line segments, determining trip delay information for the line segment based on a delay setting of a target backbone switch associated with the line segment; and

and determining the fault frequency of the line section based on the trip delay information and a plurality of pieces of fault duration data included in the fault record data.

7. The method as recited in claim 5, further comprising:

and determining the respective line lengths of the plurality of line segments based on the respective positions of the plurality of target trunk switches and the respective positions of the plurality of branch switches.

8. The method according to any one of claims 1-7, further comprising:

and performing relay protection configuration on the plurality of line switches based on the target relay protection fixed values of the plurality of line switches.

9. The utility model provides a distribution network relay protection definite value configuration device which characterized in that includes:

the first processing module is used for dividing the target power distribution network into a plurality of line sections based on initial relay protection fixed values of a plurality of line switches included in the target power distribution network, wherein the initial relay protection fixed values comprise delay fixed values;

the first determining module is used for determining the fault frequency of each of the plurality of line sections based on the respective delay fixed value of the plurality of line switches and the fault recording data of the target power distribution network;

a second determining module, configured to determine a unit failure rate of each of the plurality of line segments based on a failure frequency of each of the plurality of line segments and a line length of each of the plurality of line segments;

a third determining module, configured to determine a constant value adjustment policy based on a unit failure rate of each of the plurality of line segments; and

and the updating module is used for updating the initial relay protection fixed values of the plurality of line switches based on the fixed value adjustment strategy to obtain the target relay protection fixed values of the plurality of line switches.

10. An electronic device, comprising:

one or more processors;

A memory for storing one or more instructions,

wherein the one or more instructions, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1 to 8.

11. A computer readable storage medium having stored thereon executable instructions which when executed by a processor cause the processor to implement the method of any of claims 1 to 8.