CN113259167B - Power distribution terminal data transmission method based on event triggering mechanism - Google Patents
Power distribution terminal data transmission method based on event triggering mechanism Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Abstract
The invention discloses a power distribution terminal data transmission method based on an event triggering mechanism, which comprises the steps of constructing a new greedy adding algorithm to detect faults of a network of a power distribution network, checking whether faults exist or not, and analyzing detection results; adopting a Min algorithm to perform fault positioning, taking the fault occurring in the power grid as an event, and matching the fault event with a subscription condition when the fault occurring place is positioned; and when the fault event is matched with the subscription condition, uploading fault information to a distribution master station by adopting an adaptive data rate strategy. The invention shortens the transmission time, can effectively reduce the power consumption, changes the actual data rate, ensures the reliable data packet transmission, and optimizes the network performance and the capacity scale of the terminal nodes.
Description
Technical Field
The invention relates to the technical field of power distribution network data transmission, in particular to a power distribution terminal data transmission method based on an event triggering mechanism.
Background
At present, data collected by a power distribution terminal is sent to a main station and can be sent to an automatic main station of a distribution network only by being sent to a metering main station firstly and then forwarded by a mass data platform, so that the power distribution terminal has longer time delay, all collected data are transmitted to the main station, and the operation load of the main station is serious.
The data transmission period is long, and the effective requirement of dispatching and dispatching can not be met. In addition, the existing data processing mode is used for carrying out centralized calculation, analysis and processing on the master station, a large number of data calculation tasks increase the operation load of the master station, the system communication resource requirement and the calculation capacity cost are excessive, and the operation stability of the distribution network master station is affected.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above-described problems occurring in the prior art.
Therefore, the invention provides a distribution terminal data transmission method based on an event triggering mechanism, which can solve the problem of unstable distribution network data transmission.
In order to solve the technical problems, the invention provides the following technical scheme: the method comprises the steps of constructing a new greedy adding algorithm to detect faults of a network of the power distribution network, checking whether faults exist or not, and analyzing detection results; adopting a Min algorithm to perform fault positioning, taking the fault occurring in the power grid as an event, and matching the fault event with a subscription condition when the fault occurring place is positioned; and when the fault event is matched with the subscription condition, uploading fault information to a distribution master station by adopting an adaptive data rate strategy.
As a preferable scheme of the power distribution terminal data transmission method based on the event triggering mechanism, the invention comprises the following steps: for a network with a known topological structure, the node set is N, the available detection set is T, initialization is carried out, and the detection set is defined to be empty; selecting node N covered by least probe j I.e. the column of the detection dependency matrix with the smallest weight of the column vector corresponds toA node; from N capable of being covered to node j Selecting a probe T of the most covered nodes from the probes of (a) i Deleting all the nodes covered by the detection, namely detecting the maximum column of the weight value of the row vector capable of covering the node Nj in the matrix; deleting the column corresponding to the covered node, and repeating the covering, deleting and detecting until all the nodes are covered.
As a preferable scheme of the power distribution terminal data transmission method based on the event triggering mechanism, the invention comprises the following steps: the analysis comprises the steps that if the detection is successful, the successfully detected node is considered to be a normal node, and the normal node is added into a normal point set; if the detection fails, all nodes which are not judged to be normal nodes on the failure path are suspicious nodes, and the suspicious nodes are added into a suspicious point set; if only one suspicious point exists on a path of failure detection, and other nodes are successfully detected, the suspicious point is a fault point, and a fault point set is added; and recording all the tests which return the failure results, putting the tests in a test failure set, and deleting the detection of the nodes which undergo faults in the standby detection set.
As a preferable scheme of the power distribution terminal data transmission method based on the event triggering mechanism, the invention comprises the following steps: if the suspicious point set is empty or the standby detection set does not contain the detection of the suspicious node, the method exits, otherwise, all the detection of the fault point set in the standby test set is deleted from the standby test set; selecting a probe Ti at the standby probe set that experiences the least number of nodes in the set of suspicious points; if T i The detection result returns success, and then the nodes in the suspicious point set experienced in the detection are deleted from the suspicious point set and added into the normal point set; if the Ti detection result fails to return, adding the detection into T ft If the result returns failure and only 1 suspicious node exists in the detection, deleting the suspicious node from the suspicious point set and adding the suspicious node into the fault point set; traversal T ft Adding to the suspicious node in the probe in which 1 and only 1 suspicious node are satisfied, by deleting wells from the set of suspicious pointsAnd the barrier point set.
As a preferable scheme of the power distribution terminal data transmission method based on the event triggering mechanism, the invention comprises the following steps: the matching is accomplished by a binary tree search method, including, if the user defines a subscription Sub containing m conditions i ＝{F1，F2，F3，…，Fm}，F i Is a single attribute filter, where F i ＝(Name i ，Data Type，Operator i Value); compare AttrSet [ n ]]And Sub i Generates an n-dimensional vector Sub i [n]The generation rule is as follows, query the names of all filters i Subscript set, denoted index [ m ]]，x∈[1,n]，if x∈index[M]，Sub i [x]＝1；else Sub i [x]=0 because of Sub i [j]＝0or1，Sub i [n]May be represented using all leaf nodes of an n+1 level binary tree.
As a preferable scheme of the power distribution terminal data transmission method based on the event triggering mechanism, the invention comprises the following steps: for the defined subscription Sub i According to the filter contained therein, establishing a corresponding index by utilizing the filter coverage relation, wherein the index establishment rule comprises that the first level of an index structure is the Name of the filter i The method comprises the steps of carrying out a first treatment on the surface of the For the operator=, building an index by adopting a hash table; for < or less than or equal to, according to the coverage relation of predicates, adding an index list after ascending and arranging according to the natural size float, int or ASCII (string) values of the data; for > or more, according to the coverage relation of predicates, adding an index table after being arranged according to the natural size of data or ASCII value descending order; after subscription and index establishment are completed, if Event occurs in the power grid j Also build n-dimensional column vector Event j [n]The method comprises the steps of carrying out a first treatment on the surface of the Searching in the established binary tree, if the Event j [k]＝1(k∈int，k∈[1，n]) Searching a left subtree and a right subtree of a node corresponding to an nth layer of the binary tree along the path; if Event i [k]＝0(k∈int，k∈[1，n]) Searching for the left subtree of the corresponding nodeAfter the search is completed, all the obtained leaf nodes are subscription collections possibly matched with the event; event find i The filter determined by each attribute in the database is queried, the index list is queried, the first matching condition is queried, and the operator is queried only once; for operators < or less, the operators are arranged in the ascending order from small to large; for operators > or > in the descending order of the foregoing, queries from big to small are ordered.
As a preferable scheme of the power distribution terminal data transmission method based on the event triggering mechanism, the invention comprises the following steps: also included is a definition vector result_history j [2 n ]、Result_Now j [2 n ]These two vectors result_history j [2 n ]Representing subscriptions filtered by the previous filter, result_now j [2 n ]Representing the subscription filtered by the current filter, and exchanging two vectors each time of updating; scanning the sum of the two vector elements, if one of the vector elements is zero, terminating the matching, and not subscribing to the matching successfully; if result_history j [2 n ]If the elements are not all zero, querying the subscripts of the elements which are not zero in the vector, wherein the corresponding subscriptions are Event j Matching subscriptions of (c).
As a preferable scheme of the power distribution terminal data transmission method based on the event triggering mechanism, the invention comprises the following steps: the method comprises the steps that a terminal node sends a message in an uplink mode, and if the terminal node receives a downlink response, the terminal node keeps the original data rate; if the terminal node does not receive the downlink response and the data rate of the terminal node is not less than the limit rate, setting an uplink ADR request response mark, and sending a request message to a network; and retransmitting the uplink message if the terminal node does not receive the downlink response and the data rate of the terminal node is smaller than the limiting rate.
As a preferable scheme of the power distribution terminal data transmission method based on the event triggering mechanism, the invention comprises the following steps: if the response of the downlink message is received within the delay time of the terminal, the original data rate is maintained, otherwise, the terminal node is switched to a lower data rate, and uplink data is sent; if the terminal node receives the response of the downlink message, the original data rate is maintained; if the terminal node does not receive the downlink response and the data rate of the terminal node is not less than the limiting rate, judging whether the data is the lowest data rate in the policy table, and if so, not establishing connection with the network; and retransmitting the uplink message if the terminal node does not receive the downlink response and the data rate of the terminal node is smaller than the limiting rate.
The invention has the beneficial effects that: after the method is triggered by the fault event, the power distribution terminal reports the fault information to the master station, so that network bandwidth resources are saved, communication times are reduced, communication burden is lightened, and meanwhile, calculation cost is reduced; on the other hand, the method adopts the self-adaptive data rate technology, and the terminal nodes close to the gateway use higher data transmission rate and lower output power, so that the transmission time can be shortened, the power consumption can be effectively reduced, the actual data rate is changed to ensure reliable data packet transmission, and the network performance and the capacity scale of the terminal nodes are optimized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic flow chart of a fault detection algorithm of a power distribution terminal data transmission method based on an event trigger mechanism according to a first embodiment of the present invention;
fig. 2 is a schematic flow chart of a fault location algorithm of a power distribution terminal data transmission method based on an event trigger mechanism according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of a fault event matching flow of a power distribution terminal data transmission method based on an event triggering mechanism according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of an adaptive data rate adjustment flow of a power distribution terminal data transmission method based on an event trigger mechanism according to a first embodiment of the present invention;
fig. 5 is a schematic diagram of data transmission stability versus curve of a power distribution terminal data transmission method based on an event triggering mechanism according to a second embodiment of the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
While the embodiments of the present invention have been illustrated and described in detail in the drawings, the cross-sectional view of the device structure is not to scale in the general sense for ease of illustration, and the drawings are merely exemplary and should not be construed as limiting the scope of the invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Also in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1 to fig. 4, for a first embodiment of the present invention, there is provided a power distribution terminal data transmission method based on an event trigger mechanism, including:
s1: and (3) building a new greedy adding algorithm to detect faults of the network of the power distribution network, checking whether faults exist or not, and analyzing detection results. The following are to be described:
for a network with a known topological structure, the node set is N, the available detection set is T, initialization is carried out, and the detection set is defined as empty;
selecting node N covered by least probe j Namely, detecting the node corresponding to the column with the smallest weight of the column vector in the dependency matrix;
from N capable of being covered to node j Selecting a probe T of the most covered nodes from the probes of (a) i Deleting all the nodes covered by the detection, namely detecting the maximum column of the weight value of the row vector capable of covering the node Nj in the matrix;
deleting the column corresponding to the covered node, and repeating the covering, deleting and detecting until all the nodes are covered.
Further, the analysis includes:
if the detection is successful, the successfully detected node is considered to be a normal node, and the normal node is added into a normal point set;
if the detection fails, all nodes which are not judged to be normal nodes on the failure path are suspicious nodes, and the suspicious nodes are added into a suspicious point set;
if only one suspicious point exists on one failure detection path and other nodes are successfully detected, the suspicious point is a fault point, and a fault point set is added;
recording all the tests with failed returned results, putting the tests in a test failure set, and deleting the detection of the fault node in the standby detection set;
if the suspicious point set is empty or the standby detection set does not contain the detection of the experienced suspicious node, exiting, otherwise deleting the detection of all the experienced fault point sets in the standby test set from the standby test set;
selecting the probe Ti with the least nodes in the set of suspicious points to be experienced in the standby probe set;
if T i The detection result returns success, and then the nodes in the suspicious point set experienced in detection are deleted from the suspicious point set and added into the normal point set;
if the Ti detection result fails to return, adding the detection into T ft If the result fails to return and only 1 suspicious node exists in the detection, deleting the suspicious node from the suspicious point set and adding the suspicious node into the fault point set;
traversal T ft The suspicious nodes in the probe, in which some and only 1 suspicious node are satisfied, are deleted from the set of suspicious points and added to the set of failure points.
S2: and carrying out fault location by adopting a Min algorithm, taking the fault occurring in the power grid as an event, and carrying out matching of the fault event and the subscription condition when the fault occurrence place is located. The step is to be noted, the matching is completed by using a binary tree searching method, which comprises the following steps:
if the user defines a subscription Sub containing m conditions i ＝{F1，F2，F3，…，Fm}，F i Is a single attribute filter, where F i ＝(Name i ，Data Type，Operator i ，Value)；
Compare AttrSet [ n ]]And Sub i Generates an n-dimensional vector Sub i [n]The generation rule is as follows, query the names of all filters i Subscript set, denoted index [ m ]]，x∈[1,n]，if x∈index[M]，Sub i [x]＝1；else Sub i [x]=0 because of Sub i [j]＝0or1，Sub i [n]May be represented using all leaf nodes of an n+1 level binary tree.
For defined subscription Sub i According to the filter contained therein, establishing a corresponding index by utilizing the filter coverage relation, wherein the index establishment rule comprises:
the first level of the index structure is the Name of the filter i ；
For the operator=, building an index by adopting a hash table;
for < or less than or equal to, according to the coverage relation of predicates, adding an index list after ascending and arranging according to the natural size float, int or ASCII (string) values of the data;
for > or more, according to the coverage relation of predicates, adding an index table after being arranged according to the natural size of data or ASCII value descending order;
after subscription and index establishment are completed, if Event occurs in the power grid j Also build n-dimensional column vector Event j [n]；
Searching in the established binary tree, if the Event j [k]＝1(k∈int，k∈[1，n]) Searching a left subtree and a right subtree of a node corresponding to an nth layer of the binary tree along the path;
if Event i [k]＝0(k∈int，k∈[1，n]) Searching a left subtree of the corresponding node, and obtaining all leaf nodes as a subscription collection possibly matching the event after searching is completed;
event find i Each of (3)The filter with determined attribute and querying its index list, query the first matched condition, only need to query once for operator =;
for operators < or less, the operators are arranged in the ascending order from small to large;
for operators > or > in the descending order of the foregoing, queries from big to small are ordered.
Still further, still include:
definition vector result_history j [2 n ]、Result_Now j [2 n ]These two vectors result_history j [2 n ]Representing subscriptions filtered by the previous filter, result_now j [2 n ]Representing the subscription filtered by the current filter, and exchanging two vectors each time of updating;
scanning the sum of the two vector elements, if one of the vector elements is zero, terminating the matching, and not subscribing to the matching successfully;
if result_history j [2 n ]If the elements are not all zero, the subscripts of the elements which are not zero in the query vector are the Event j Matching subscriptions of (c).
S3: and when the fault event is matched with the subscription condition, uploading fault information to the power distribution master station by adopting an adaptive data rate strategy. Among them, it is also to be noted that:
the terminal node sends the message up, if the terminal node receives the down response, the terminal node keeps the original data rate;
if the terminal node does not receive the downlink response and the data rate of the terminal node is not less than the limit rate, setting an uplink ADR request response mark, and sending a request message to the network;
if the terminal node does not receive the downlink response and the data rate of the terminal node is smaller than the limit rate, retransmitting the uplink message;
if the response of the downlink message is received within the delay time of the terminal, the original data rate is maintained, otherwise, the terminal node is switched to a lower data rate, and uplink data is sent;
if the terminal node receives the response of the downlink message, the original data rate is maintained;
if the terminal node does not receive the downlink response and the data rate of the terminal node is not less than the limiting rate, judging whether the data is the lowest data rate in the policy table, and if so, not establishing connection with the network;
if the terminal node does not receive the downlink response and the data rate of the terminal node is smaller than the limit rate, retransmitting the uplink message.
Preferably, in the present technical solution, the data collected by the power distribution terminal is sent to the master station and can be sent to the distribution network automation master station only by being sent to the metering master station first and then forwarded by the mass data platform, which has longer delay, and all collected data are transmitted to the master station, so that the operation load of the master station is serious; the method of the invention uses the self-adaptive data rate technology to make the terminal node close to the gateway use higher data transmission rate and lower output power, thus not only shortening the transmission time, but also effectively reducing the power consumption, and only using the lowest data rate and the largest output rate at the node with very edge of the link budget.
Example 2
Referring to fig. 5, in a second embodiment of the present invention, which is different from the first embodiment, an experimental comparative test of a data transmission method of a power distribution terminal based on an event triggering mechanism is provided, and specifically includes:
in order to better verify and explain the technical effects adopted in the method, the embodiment selects the traditional power distribution network data transmission method to be compared with the method, and the test results are compared by a scientific demonstration means to verify the true effects of the method.
The traditional power distribution network data transmission method can only be transmitted to the metering master station and then transmitted to the distribution network automation master station through the mass data platform, has longer delay, transmits all acquired data to the master station, has serious operation load of the master station and is easy to cause instability of a power distribution network system; in order to verify that the method has higher transmission efficiency and stability compared with the traditional method, the traditional method and the method are adopted to respectively test and compare the power distribution network system of the simulation platform in the embodiment.
Test environment: inputting power distribution network system parameters of a power supply bureau in the south into a simulation platform for simulation operation and simulating a data transmission scene, adopting historical power distribution network data information of 6 months to 9 months in 2020 as a test sample, and respectively carrying out transmission test by using forwarding operation of a traditional method to obtain test result data; by adopting the method, automatic test equipment is started, MATLB is used for realizing the simulation test of the method, and simulation data are obtained according to experimental results.
Each method tests 100 groups of data, calculates the time for obtaining each group of data, and performs error comparison calculation with the actual predicted value input by simulation.
Referring to fig. 5, the solid line is the curve output by the method of the present invention, the dotted line is the curve output by the conventional method, according to the schematic diagram of fig. 5, it can be intuitively seen that the solid line and the dotted line show different trends with the increase of time, and compared with the dotted line, the solid line always shows a stable rising trend in the early stage, and the solid line has little fluctuation and always stays above the dotted line for a certain distance although sliding down in the later stage, and the dotted line shows a larger fluctuation trend and is unstable, so that the stability state of the solid line is always greater than that of the dotted line, i.e. the true effect of the method of the present invention is verified.
Preferably, the master station in the traditional method forwards data through a mass data platform or a data center, the data transmission period is long, the actual demand of dispatching and dispatching cannot be met, the existing data processing mode is that the master station performs centralized calculation, analysis and processing, a large number of data calculation tasks increase the operation load of the master station, and the operation stability of the master station of the distribution network is affected; therefore, the method of the invention adopts a fault triggering mode to transmit data, which can reduce the operation load of the master station, solve the problems of overlarge communication resource requirement and calculation capacity cost of the system and ensure the system stability.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (5)
1. A power distribution terminal data transmission method based on an event trigger mechanism is characterized in that: comprising the steps of (a) a step of,
building a new greedy adding algorithm to detect faults of a network of the power distribution network, checking whether faults exist or not, and analyzing detection results;
adopting a Min algorithm to perform fault positioning, taking the fault occurring in the power grid as an event, and matching the fault event with a subscription condition when the fault occurring place is positioned;
when the fault event is matched with the subscription condition, uploading fault information to a power distribution main station by adopting an adaptive data rate strategy;
for a network with a known topological structure, the node set is N, the available detection set is T, initialization is carried out, and the detection set is defined as empty;
selecting node N covered by least probe j Namely, detecting the node corresponding to the column with the smallest weight of the column vector in the dependency matrix;
from N capable of being covered to node j Selecting a probe T of the most covered nodes from the probes of (a) i Deleting all the nodes covered by the detection, namely detecting the maximum column of the weight value of the row vector capable of covering the node Nj in the matrix;
deleting the column corresponding to the covered node, and repeating the covering, deleting and detecting until all the nodes are covered;
if the detection is successful, the successfully detected node is considered to be a normal node, and the normal node is added into a normal point set;
if the detection fails, all nodes which are not judged to be normal nodes on the failure path are suspicious nodes, and the suspicious nodes are added into a suspicious point set;
if only one suspicious point exists on a path of failure detection, and other nodes are successfully detected, the suspicious point is a fault point, and a fault point set is added;
recording all the tests with failed returned results, putting the tests in a test failure set, and deleting the detection of the fault node in the standby detection set;
if the suspicious point set is empty or the standby detection set does not contain the detection of the suspicious nodes, the method exits, otherwise, all the detection of the fault point set in the standby test set is deleted from the standby test set;
selecting a probe Ti at the standby probe set that experiences the least number of nodes in the set of suspicious points;
if T i The detection result returns success, and then the nodes in the suspicious point set experienced in the detection are deleted from the suspicious point set and added into the normal point set;
if the Ti detection result fails to return, adding the detection into T ft If the result returns failure and only 1 suspicious node exists in the detection, deleting the suspicious node from the suspicious point set and adding the suspicious node into the fault point set;
traversal T ft Adding suspicious nodes in the detection, wherein the suspicious nodes meet the requirement that the suspicious nodes are 1, to the fault point set by deleting wells from the suspicious point set;
fault event and subscription condition matching, attrSet [ n ]]Defined as a set of fault events occurring in the grid, if a user defines a subscription Sub containing m conditions i ＝{F1，F2，F3，…，Fm}，F i Is a single attribute filter, where F i ＝(Name i ，Data Type，Operator i ，Value)；
Compare AttrSet [ n ]]And Sub i Generates an n-dimensional vector Sub i [n]The generation rule is as follows, query the names of all filters i A set of the set of index sets,is denoted as index [ m ]]，x∈[1,n]，if x∈index[M]，Sub i [x]＝1；else Sub i [x]=0 because of Sub i [j]＝0or1，Sub i [n]May be represented using all leaf nodes of an n+1 level binary tree.
2. The method for transmitting data of a power distribution terminal based on an event triggering mechanism according to claim 1, wherein: for the defined subscription Sub i According to the filter contained therein, establishing a corresponding index by using the filter coverage relation, wherein the index establishment rule comprises,
the first level of the index structure is the Name of the filter i ；
For the operator=, building an index by adopting a hash table;
for < or less than or equal to, according to the coverage relation of predicates, adding an index list after ascending and arranging according to the natural size float, int or ASCII (string) values of the data;
for > or more, according to the coverage relation of predicates, adding an index table after being arranged according to the natural size of data or ASCII value descending order;
after subscription and index establishment are completed, if Event occurs in the power grid j Also build n-dimensional column vector Event j [n]；
Searching in the established binary tree, if the Event j [k]＝1，k∈int，k∈[1，n]Searching a left subtree and a right subtree of a node corresponding to an nth layer of the binary tree along the path;
if Event i [k]＝0，k∈int，k∈[1，n]Searching a left subtree of the corresponding node, and obtaining all leaf nodes as a subscription collection possibly matching the event after searching is completed;
event find i The filter determined by each attribute in the database is queried, the index list is queried, the first matching condition is queried, and the operator is queried only once;
for operators < or less, the operators are arranged in the ascending order from small to large;
for operators > or > in the descending order of the foregoing, queries from big to small are ordered.
3. The method for transmitting data of a power distribution terminal based on an event triggering mechanism according to claim 2, wherein: also included is a method of manufacturing a semiconductor device,
definition vector result_history j [2 n ]、Result_Now j [2 n ]These two vectors result_history j [2 n ]Representing subscriptions filtered by the previous filter, result_now j [2 n ]Representing the subscription filtered by the current filter, and exchanging two vectors each time of updating;
scanning the sum of the two vector elements, if one of the vector elements is zero, terminating the matching, and not subscribing to the matching successfully;
if result_history j [2 n ]If the elements are not all zero, querying the subscripts of the elements which are not zero in the vector, wherein the corresponding subscriptions are Event j Matching subscriptions of (c).
4. The method for transmitting data of a power distribution terminal based on an event triggering mechanism according to claim 3, wherein: comprising the steps of (a) a step of,
the terminal node sends a message in an uplink way, and if the terminal node receives a downlink response, the terminal node keeps the original data rate;
if the terminal node does not receive the downlink response and the data rate of the terminal node is not less than the limit rate, setting an uplink ADR request response mark, and sending a request message to a network;
and retransmitting the uplink message if the terminal node does not receive the downlink response and the data rate of the terminal node is smaller than the limiting rate.
5. The method for transmitting data of a power distribution terminal based on an event triggering mechanism according to claim 4, wherein: also included is a method of manufacturing a semiconductor device,
if the response of the downlink message is received within the delay time of the terminal, the original data rate is maintained, otherwise, the terminal node is switched to a lower data rate, and uplink data is sent;
if the terminal node receives the response of the downlink message, the original data rate is maintained;
if the terminal node does not receive the downlink response and the data rate of the terminal node is not less than the limiting rate, judging whether the data is the lowest data rate in the policy table, and if so, not establishing connection with the network; and retransmitting the uplink message if the terminal node does not receive the downlink response and the data rate of the terminal node is smaller than the limiting rate.
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