CN111650478B - Power distribution network fault diagnosis and positioning method and gateway - Google Patents
Power distribution network fault diagnosis and positioning method and gateway Download PDFInfo
- Publication number
- CN111650478B CN111650478B CN202010679824.1A CN202010679824A CN111650478B CN 111650478 B CN111650478 B CN 111650478B CN 202010679824 A CN202010679824 A CN 202010679824A CN 111650478 B CN111650478 B CN 111650478B
- Authority
- CN
- China
- Prior art keywords
- distribution network
- power distribution
- abnormal
- gateway
- electrical operation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
Abstract
The embodiment of the invention discloses a power distribution network fault diagnosis and positioning method and a gateway. According to the power distribution network fault diagnosis and positioning method, data information of key nodes of a power distribution network is obtained, wherein the data information comprises electrical operation data and identification information, whether the electrical operation data are abnormal or not is judged, a physical topological connection relation graph of the power distribution network is drawn according to the identification information, and a position interval where a fault point of the power distribution network is located is positioned according to a judgment result of whether the electrical operation data are abnormal or not and the physical topological connection relation graph. By the technical scheme of the embodiment of the invention, the technical problem that fault diagnosis is lack of simplicity and accuracy due to the fact that self-formed systems of various monitoring terminals of the conventional power distribution network cannot be associated with each other is solved, key node-based association diagnosis in the power distribution network is realized, and further, the power distribution network fault is simply, conveniently and accurately positioned.
Description
Technical Field
The embodiment of the invention relates to the technical field of power distribution network construction, in particular to a power distribution network fault diagnosis and positioning method and a gateway.
Background
The low-voltage distribution network is a terminal link of a power distribution system, and reliable operation of the low-voltage distribution network, initiative and timely study and judgment of faults and rapid first-aid repair are of great importance to improving power supply reliability and high-quality service level. The traditional power distribution network monitoring terminals are various in types and lack unified standards, and the various monitoring terminals cannot be associated with each other in the five-flower eight-door self-formed system such as interfaces, protocols and function extensions, so that the fault diagnosis lacks simplicity and accuracy.
Disclosure of Invention
The embodiment of the invention provides a power distribution network fault diagnosis and positioning method and a gateway, which are used for realizing simple, convenient and accurate positioning of power distribution network faults.
In a first aspect, an embodiment of the present invention provides a power distribution network fault diagnosis and location method, where the power distribution network fault diagnosis and location method includes:
acquiring data information of a key node of the power distribution network, wherein the data information comprises electrical operation data and identification information;
judging whether the electrical operation data are abnormal or not, and drawing a physical topological connection relation graph of the power distribution network according to the identification information;
and positioning the position interval of the fault point of the power distribution network according to the judgment result of whether the fault is abnormal and the physical topological connection relation graph.
Optionally, the method further includes, according to a determination result of whether the fault occurs abnormally and the physical topology connection relation diagram, positioning a location interval where the fault point of the power distribution network is located:
and sending the data information, the physical topological connection relation graph, the judgment result of whether the fault point is abnormal and the positioning of the position interval where the fault point is located to the cloud server, so that the cloud server rechecks the judgment result of whether the fault point is abnormal and rechecks the positioning of the position interval where the fault point is located.
Optionally, the positioning the location interval where the fault point of the power distribution network is located according to the determination result of whether the fault point is abnormal and the physical topology connection relation diagram includes:
if the judgment result is abnormal, determining the corresponding key node as an abnormal key node;
and comparing the electrical operation data of the abnormal key node with the electrical operation data of the key node adjacent to the abnormal key node in the physical topological connection relation graph for the first time so as to position the position interval of the fault point.
Optionally, the first round of comparison is performed on the electrical operation data of the abnormal key node and the electrical operation data of the key node adjacent to the abnormal key node in the physical topological connection relation diagram, so as to locate the position interval where the fault point is located, and then the method further includes:
if the position section where the fault point is located cannot be located in the previous comparison, the electrical operation data of the abnormal key node is compared with the electrical operation data of the key node adjacent to the key node which is subjected to the previous comparison in the physical topological connection relation graph in the next comparison, so that the position section where the fault point is located.
Optionally, after the position interval where the fault point of the power distribution network is located is positioned according to the judgment result of whether the fault point is abnormal and the physical topology connection relation graph; or, after the cloud server rechecks whether the abnormal result is obtained and rechecks the location of the location interval where the fault point is located, the method further includes:
positioning the judgment result and the position interval where the fault point is located; or, the rechecking result of the judgment result of whether the fault occurs or not and the rechecking result of the positioning of the position section where the fault point is located are sent to the client.
Optionally, the obtaining data information of the key node of the power distribution network includes:
and acquiring data information of the key node from the monitoring terminal arranged at the key node.
In a second aspect, an embodiment of the present invention further provides a power distribution network fault diagnosis and location gateway, including a gateway acquisition unit and a gateway data processing unit;
the gateway acquisition unit is used for acquiring data information of key nodes of the power distribution network, wherein the data information comprises electrical operation data and identification information;
the gateway data processing unit comprises a processor, a protocol adapter and a communication module; the communication module is in communication connection with the gateway acquisition unit; the processor is in communication connection with the communication module through a protocol adapter, and the protocol adapter is used for completing the conversion of communication protocols among the processor, the communication module and the gateway acquisition unit;
the processor comprises a data analysis unit and a topology identification unit;
the topology identification unit is used for acquiring identification information of the key node from the gateway acquisition unit through the communication module and drawing a physical topology connection relation graph of the power distribution network according to the identification information;
the data analysis unit is used for acquiring the electrical operation data of the key node from the gateway acquisition unit through the communication module and judging whether the electrical operation data is abnormal or not; and the data analysis unit is also used for positioning the position interval of the fault point of the power distribution network according to the judgment result of whether the fault point is abnormal and the physical topology connection relation graph.
Optionally, the communication module includes a wireless communication unit and a wired acquisition convergence interface.
Optionally, the gateway acquisition unit includes a processor, a voltage transformer, a voltage transmitter, a current transformer, a current transmitter, and a communication unit;
the voltage transformer is connected with the processor through the voltage transducer, and the current transformer is connected with the processor through the current transducer; the processor is used for preprocessing the electrical operation data of the key nodes collected by the voltage transformer and the current transformer;
the communication unit is used for transmitting the electrical operation data to the gateway data processing unit.
Optionally, the gateway acquisition unit and the gateway data processing unit both include a carrier transceiver unit;
the carrier transceiver unit in the gateway acquisition unit is in communication connection with the processor in the gateway acquisition unit; the carrier transceiver unit in the gateway data processing unit is in communication connection with the processor in the gateway data processing unit through a protocol adapter in the gateway data processing unit; the carrier wave receiving and transmitting unit is used for assisting the topology identification unit to draw a physical topology connection relation graph of the power distribution network.
According to the power distribution network fault diagnosis and positioning method provided by the embodiment of the invention, the data information of the key nodes of the power distribution network is obtained, wherein the data information comprises the electrical operation data and the identification information, so that whether the electrical operation data is abnormal or not is judged, the physical topological connection relation diagram of the power distribution network is drawn according to the identification information, and the position interval of the fault point of the power distribution network is positioned according to the judgment result of whether the electrical operation data is abnormal or not and the physical topological connection relation diagram. The technical problem that fault diagnosis is lack of simplicity and accuracy due to the fact that various monitoring terminals are arranged in an existing power distribution network and cannot be associated with one another in self-formed systems is solved, and the power distribution network fault is simply and accurately positioned.
Drawings
Fig. 1 is a flowchart of a power distribution network fault diagnosis and positioning method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a part of key nodes in a physical topology connection diagram of a power distribution network according to an embodiment of the present invention;
fig. 3 is a flowchart of a power distribution network fault diagnosis and positioning method according to an embodiment of the present invention;
fig. 4 is a flowchart of a power distribution network fault diagnosis and positioning method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a distribution network fault diagnosis and location gateway provided in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the present invention is applicable to a scenario of positioning a fault point in a low voltage distribution network, and fig. 1 is a flowchart of a method for diagnosing and positioning a fault of a distribution network according to the embodiment of the present invention, as shown in fig. 1, the method for diagnosing and positioning a fault of a distribution network includes:
and S10, acquiring data information of the key nodes of the power distribution network, wherein the data information comprises electrical operation data and identification information.
Specifically, a plurality of distribution transformers, low-voltage switch cabinets, low-voltage branch boxes, user electric meter boxes and other equipment are arranged and installed on a circuit in the power distribution network, one equipment installation position on the circuit can correspond to one key node on the circuit, and in addition, the key nodes can also be distributed at any circuit branch point, circuit junction point and a certain position point on the circuit, which need fault monitoring in the circuit. Any monitoring terminal in the prior art is arranged at the key node, and the monitoring terminal can acquire data information at the key node in real time and has a communication function, such as a wired communication function and/or a wireless communication function, which can communicate with the outside, and the monitoring terminal is, for example, a terminal in a monitoring management system associated with the device itself or a fault indicator installed on a line. The data information comprises electrical operation data and identification information, wherein the electrical operation data comprises information such as voltage, current and phase at a key node; the identification information can indicate the position of the key node on the line, and the identification information can also be the model of the monitoring terminal set at the key node or the serial number of the monitoring terminal in the line, and can also be the model of the equipment at the key node or the serial number of the equipment in the line.
Optionally, the obtaining data information of the key node of the power distribution network includes: and acquiring data information of the key node from the monitoring terminal arranged at the key node.
And S11, judging whether the electrical operation data are abnormal or not, and drawing a physical topological connection relation graph of the power distribution network according to the identification information.
Specifically, the obtained electrical operation data at the key node is determined, and whether the electrical operation data is abnormal or not is determined, that is, whether voltage, current and phase are abnormal or not is determined, for example, no voltage or no current is generated. And drawing a physical topological connection relation graph of the power distribution network according to the acquired identification information of the key nodes, wherein the physical topological connection relation graph comprises all the key nodes and the connection relation among the key nodes.
And S12, positioning the position interval of the fault point of the power distribution network according to the judgment result of whether the fault is abnormal and the physical topological connection relation graph.
Specifically, in the physical topological connection relation diagram, some electrical operation data at the key nodes have no abnormality, and some electrical operation data at the key nodes have an abnormality. And comparing the electrical operation data of the abnormal key nodes with the electrical operation data of the non-abnormal key nodes by using the connection relation among the key nodes in the physical topological connection relation graph, so as to judge the position interval of the fault point in the physical topological connection relation graph. For example, fig. 2 is a schematic diagram of a part of key nodes in a physical topological connection diagram of a power distribution network according to an embodiment of the present invention, as shown in fig. 2, in the physical topological connection relationship diagram, a key node a is adjacent to and connected to a key node B, a key node C is adjacent to and connected to a key node B, a key node D is adjacent to and connected to a key node B, electrical operation data at the key node a is abnormal, but compared with electrical operation data at the key node a, electrical operation data of the key node B, the key node C, and the key node D are all not abnormal, and at this time, it can be determined that a location interval of a fault point is between the key node a and the key node B.
In summary, various monitoring terminals of the existing power distribution network form a system, data cannot be shared among different types of devices or monitoring terminals installed at various nodes of a line, different types of fault monitoring terminals at adjacent nodes cannot perform correlation diagnosis, and in practice, a single fault monitoring terminal only depends on a certain point or a certain type of terminal, so that fault diagnosis misjudgment or misjudgment is often caused, and the fault diagnosis accuracy is not high; in addition, in order to realize accurate positioning of a fault point, a special fault positioning device needs to be additionally arranged, and the existing monitoring terminal is not fully utilized, so that the method is neither economical nor convenient. The power distribution network fault diagnosis and positioning method provided by the embodiment of the invention overcomes the technical defects, can acquire the electrical operation data of each key node in the power distribution network based on the electrical operation data acquired by the existing monitoring terminal, then judges whether the electrical operation data of each key node is abnormal or not and draws a physical topological connection relation graph, and further realizes the association diagnosis of each monitoring terminal and each key node by acquiring the electrical operation data of the key node acquired by the monitoring terminal of the key node according to the judgment result of whether all the key nodes are abnormal or not and the physical topological connection relation graph, thereby avoiding the conditions of fault omission and misjudgment in the power distribution network and realizing the simple and accurate positioning of the position section where the fault point of the power distribution network is located.
Optionally, the method further includes, according to a determination result of whether the fault occurs abnormally and the physical topology connection relation diagram, positioning a location interval where the fault point of the power distribution network is located:
and sending the data information, the judgment result of whether the fault point is abnormal and the location of the position interval where the fault point is located to the cloud server, so that the cloud server rechecks the judgment result of whether the fault point is abnormal and rechecks the location of the position interval where the fault point is located.
Fig. 3 is a flowchart of a power distribution network fault diagnosis and location method according to an embodiment of the present invention, and as shown in fig. 3, the power distribution network fault diagnosis and location method includes:
and S20, acquiring data information of the key nodes of the power distribution network, wherein the data information comprises electrical operation data and identification information.
And S21, judging whether the electrical operation data are abnormal or not, and drawing a physical topological connection relation graph of the power distribution network according to the identification information.
And S22, positioning the position interval of the fault point of the power distribution network according to the judgment result of whether the fault is abnormal and the physical topological connection relation graph.
And S23, sending the data information, the physical topological connection relation diagram, the judgment result of whether the fault point is abnormal and the location of the position interval where the fault point is located to the cloud server, so that the cloud server rechecks the judgment result of whether the fault point is abnormal and rechecks the location of the position interval where the fault point is located.
Specifically, a large amount of power information of the power distribution network is stored in the cloud server, the power information relates to power information of equipment, monitoring terminals and circuits, power scheduling, metering, a GIS (geographic information system) and the like are more perfect, and the power information can be used for further rechecking and perfecting the positioning of the position interval of the fault point on the basis of positioning the position interval of the fault point by using the data information of the key nodes, so that the positioning of the position interval of the fault point is further accurate.
Therefore, the obtained data information, the physical topological connection relation diagram, the judgment result of whether the electrical operation data of the key node is abnormal or not and the positioning of the position interval where the fault point is located are sent to the cloud server, so that the cloud server rechecks and perfects the judgment result of whether the electrical operation data is abnormal or not, and also rechecks and perfects the positioning of the position interval where the fault point is located, and further accuracy and correctness in positioning of the position interval where the fault point is located are achieved. That is to say, the rechecking and perfecting are performed by positioning the location interval of the fault point by using more perfect power information in the cloud server and data information of the key node sent to the cloud server, and the rechecking and perfecting result is more accurate than the previous judgment result, so that the final positioning result can be based on the rechecking and perfecting result.
In addition, the physical topological connection relation graph can be rechecked and perfected by utilizing more perfect electric power information in the cloud server and data information sent to the key nodes of the cloud server, and the rechecked physical topological connection relation graph and the perfected physical topological connection relation graph are stored and can be stored in the cloud server.
In summary, the power distribution network fault diagnosis and method provided by the embodiment of the invention can be based on the electrical operation data acquired by the existing monitoring terminal, and on the basis of realizing simple and accurate positioning of the location interval where the fault point of the power distribution network is located, the location of the location interval where the fault point is located is rechecked and perfected by using a large amount of power information in the power distribution network in the cloud server, so that the location of the location interval where the fault point is located is further accurate.
Optionally, the positioning the location interval where the fault point of the power distribution network is located according to the determination result of whether the fault point is abnormal and the physical topology connection relation diagram includes:
if the judgment result is abnormal, determining the corresponding key node as an abnormal key node;
and comparing the electrical operation data of the abnormal key node with the electrical operation data of the key node adjacent to the abnormal key node in the physical topological connection relation graph for the first time so as to position the position interval of the fault point.
Optionally, the first round of comparison is performed on the electrical operation data of the abnormal key node and the electrical operation data of the key node adjacent to the abnormal key node in the physical topological connection relation diagram, so as to locate the position interval where the fault point is located, and then the method further includes:
if the position section where the fault point is located cannot be located in the previous comparison, the electrical operation data of the abnormal key node is compared with the electrical operation data of the key node adjacent to the key node which is subjected to the previous comparison in the physical topological connection relation graph in the next comparison, so that the position section where the fault point is located.
Fig. 4 is a flowchart of a power distribution network fault diagnosis and location method provided in an embodiment of the present invention, and as shown in fig. 4, the power distribution network fault diagnosis and location method includes:
and S30, acquiring data information of the key nodes of the power distribution network, wherein the data information comprises electrical operation data and identification information.
And S31, judging whether the electrical operation data are abnormal or not, and drawing a physical topological connection relation graph of the power distribution network according to the identification information.
S32, if the judgment result is abnormal, determining the corresponding key node as an abnormal key node; and comparing the electrical operation data of the abnormal key node with the electrical operation data of the key node adjacent to the abnormal key node in the physical topological connection relation graph for the first time so as to position the position interval of the fault point.
Specifically, if the electrical operation data at a certain key node is judged to be abnormal, the key node is determined to be an abnormal key node, and the electrical operation data of the key node adjacent to the abnormal key node in the physical connection relation graph and the electrical operation data of the abnormal key node are compared for the first round, so that the position interval where the fault point is located. For example, with continued reference to fig. 2, in the physical topological connection relationship diagram, the key node E is adjacent to the key node F, the key node G is adjacent to the key node E, the key node H is adjacent to the key node F, and the key node I is adjacent to the key node G, if it is determined that the electrical operation data at the key node E is abnormal, the key node E is determined to be an abnormal key node, and the electrical operation data of the key node E is compared with the electrical operation data of the key node F and the electrical operation data of the key node G, so as to determine whether the location interval of the fault point is between the key node E and the key node F or between the location interval of the fault point and the key node E and the key node G.
And S33, if the position section where the fault point is located cannot be located in the previous comparison, performing the next comparison on the electrical operation data of the abnormal key node and the electrical operation data of the key node adjacent to the key node performing the previous comparison in the physical topological connection relation diagram so as to locate the position section where the fault point is located.
Illustratively, with reference to fig. 2, if the location section where the fault point is located cannot be located in the first round of comparison, the electrical operation data of the abnormal key node is compared with the electrical operation data of the key node adjacent to the key node performing the first round of comparison in the physical topology connection relation graph in the second round of comparison. For example, if the location interval where the fault point is located cannot be determined after comparing the electrical operation data of the key node E with the electrical operation data of the key node F and the electrical operation data of the key node G, the electrical operation data of the key node E may be compared with the electrical operation data of the key node H and the electrical operation data of the key node I to determine the location interval where the fault point is located, and so on, the electrical operation data of all key nodes in the power distribution network may be compared with the electrical operation data of a certain abnormal key node at most to finally accurately locate the location interval where the fault point is located.
Optionally, while the location interval where the fault point is located, the fault type of the fault point in the power distribution network may also be determined according to a determination result of whether the electrical operation data at the key node is abnormal.
In summary, the power distribution network fault diagnosis and positioning method provided by the embodiment of the invention obtains the electrical operation data at each key node in the power distribution network, then judges whether the electrical operation data at each key node is abnormal or not and draws a physical topological connection relation graph, compares the electrical operation data at the abnormal key node with the electrical operation data at the adjacent key node, and relates to the electrical operation data at a plurality of key nodes in the process of positioning the position interval of the fault point, thereby realizing the correlation diagnosis based on the key nodes in the power distribution network and further realizing the accurate positioning of the position interval of the fault point.
Optionally, after the position interval where the fault point of the power distribution network is located is positioned according to the judgment result of whether the fault point is abnormal and the physical topology connection relation graph; or, after the cloud server rechecks whether the abnormal result is obtained and rechecks the location of the location interval where the fault point is located, the method further includes: positioning the judgment result and the position interval where the fault point is located; or, the rechecking result of the judgment result of whether the fault occurs or not and the rechecking result of the positioning of the position section where the fault point is located are sent to the client. Specifically, the acquired data information of the key node, the judgment result of whether the electrical operation data of the key node is abnormal or not and the physical topological connection relation graph can be sent to the client terminal in real time, so that maintenance personnel can inquire the electrical operation data of the key node in real time, and the positioning of the position interval where the fault point is located can be sent to the client terminal in real time. Or after the cloud server rechecks the judgment result and the positioning result, if the rechecking result is consistent with the judgment result and the positioning result and is a fault-free point, the electrical operation data and the physical topological connection relation diagram at the key node can be sent to the client, if the rechecking result is consistent with the judgment result and the positioning result and is a fault-free point, the electrical operation data, the physical topological connection relation diagram, the rechecking result and the fault type at the key node can be sent to the client, and if the rechecking result is inconsistent with the judgment result and the positioning result, the electrical operation data at the key node can also be sent to the client so as to remind maintenance personnel to decide the fault-free point by operation and maintenance. Can be displayed on the client
Fig. 5 is a schematic structural diagram of a power distribution network fault diagnosis and location gateway provided in the embodiment of the present invention, as shown in fig. 5, the power distribution network fault diagnosis and location gateway includes a gateway acquisition unit 20 and a gateway data processing unit 10; the gateway collecting unit 20 is configured to collect data information of a key node of the power distribution network, where the data information includes electrical operation data and identification information.
The gateway data processing unit 10 includes a processor 11, a protocol adapter 12, and a communication module 13; the communication module 13 is in communication connection with the gateway acquisition unit 20; the processor 11 is in communication connection with the communication module 13 through a protocol adapter 12, and the protocol adapter 12 is used for completing the conversion of the communication protocol among the processor 11, the communication module 13 and the gateway acquisition unit 20;
the processor 11 includes a data analysis unit 110 and a topology recognition unit 111; the topology identification unit 111 is configured to obtain identification information of the key node from the gateway acquisition unit 20 through the communication module 13, and draw a physical topology connection relation diagram of the power distribution network according to the identification information; the data analysis unit 110 is configured to obtain electrical operation data of the key node from the gateway acquisition unit 20 through the communication module 13, and determine whether the electrical operation data is abnormal; the data analysis unit 110 is further configured to locate a location interval where a fault point of the power distribution network is located according to the determination result of whether the fault point is abnormal and the physical topology connection relation diagram.
Specifically, any one of the monitoring terminals in the prior art may be set at the key node, but if no monitoring terminal is set, the gateway acquisition unit 20 may be set at the key node, and the gateway acquisition unit 20 acquires data information at the key node in real time instead of the monitoring terminal, and sends the acquired data information to the gateway data processing unit 10.
The processor in the gateway data processing unit 10 comprises a topology identification unit 111 and a data analysis unit 110. The topology identification unit 111 draws a physical topology connection relation graph of the power distribution network according to the acquired identification information of the key nodes, where the physical topology connection relation graph includes all the key nodes and connection relations among the key nodes. The data analysis unit 110 determines the acquired electrical operation data at the key node, and determines whether the electrical operation data is abnormal, that is, whether voltage, current, and phase are abnormal, for example, no voltage or no current occurs; and comparing the electrical operation data of the abnormal key nodes with the electrical operation data of the non-abnormal key nodes by using the connection relation among the key nodes in the physical topological connection relation graph, so as to judge the position interval of the fault point in the physical topological connection relation graph. The protocol adapter 12 converts different communication protocols among the processor, the communication module 13 and the gateway acquisition unit 20.
In summary, the distribution network fault diagnosis and positioning gateway provided by the embodiment of the invention can be based on the electrical operation data acquired by the existing monitoring terminal, and can also provide a gateway acquisition unit capable of acquiring data information at key nodes. The gateway data processing unit acquires electrical operation data at each key node in the power distribution network, then judges whether the electrical operation data at each key node is abnormal or not and draws a physical topological connection relation graph, and further realizes simple, convenient and accurate positioning of a position interval where a fault point of the power distribution network is located according to the judgment result of whether all the key nodes are abnormal or not and the physical topological connection relation graph. The gateway data processing unit is provided with a protocol adapter which can complete the conversion between different communication protocols, thereby being capable of simply and conveniently obtaining effective data information of key nodes from different monitoring terminals, gateway acquisition units and the like, and further realizing the accurate positioning of the fault point position interval.
With continued reference to fig. 4, optionally, the communication module 13 in the gateway data processing unit 10 includes a wireless communication unit 130 and a wired acquisition convergence interface 131.
Specifically, the wireless communication unit 130 includes short-distance, medium-distance and long-distance wireless communications, wherein the short-distance and long-distance communications support micropower wireless, WiFi, bluetooth, LoRa and other communications, and are used for downlink communications to the power distribution network key node monitoring terminal or the gateway acquisition unit 20; the long-distance communication mode supports a 3G/4G/5G wireless public network and a power private network, and is used for performing uplink communication on the cloud server, so that the gateway data processing unit 10 sends the data information, the judgment result of whether the fault is abnormal and the location of the position interval where the fault point is located to the cloud server, the cloud server rechecks the judgment result of whether the fault is abnormal and rechecks the location of the position interval where the fault point is located.
The wired acquisition and fusion interface 131 supports RS232, RS485, CAN, RJ45 and optical fiber communication, wherein the RS232, RS485, CAN, and RJ45 are used for downlink communication with the power distribution network key node monitoring terminal or the gateway acquisition unit 20; the optical fiber communication is used for uplink communication of the cloud server, so that the gateway data processing unit 10 sends the data information, the judgment result of whether the fault occurs and the location of the location section where the fault point is located to the cloud server, so that the cloud server rechecks the judgment result of whether the fault occurs and rechecks the location of the location section where the fault point is located.
With continued reference to fig. 4, optionally, the gateway data processing unit 10 further includes a data storage unit 14, which is capable of storing data information of the key node, a physical topology connection relation diagram, a determination result of whether the electrical operation data of the key node is abnormal, and data such as positioning of a fault point position interval. With continued reference to fig. 4, optionally, the gateway data processing unit 10 further includes a power supply unit, and the power supply unit 15 is configured to supply power to the gateway data processing unit 10.
As shown in fig. 5, optionally, the gateway acquisition unit 20 includes a processor 21, a voltage transformer 22, a voltage transmitter 23, a current transformer 24, a current transmitter 25, and a communication unit 26;
the voltage transformer 22 is connected with the processor 21 through a voltage transducer 23, and the current transformer 24 is connected with the processor 21 through a current transducer 25; the processor 21 is used for preprocessing the electrical operation data of the key nodes collected by the voltage transformer 22 and the current transformer 24; the communication unit 26 is used to transmit electrical operating data to the gateway data processing unit 10. Specifically, after the voltage transformer 22 and the current transformer 24 are connected to the key node, the voltage transformer 22 and the current transformer 24 collect the electrical operation data at the key node in real time, and the collected electrical operation data is preprocessed by the processor 21 and then transmitted to the gateway data processing unit 10 through the communication unit 26. The preprocessing of the electrical operation data by the processor 21 refers to processing such as classifying and packaging the electrical operation data.
With continued reference to fig. 5, optionally, the gateway collection unit 20 further includes a power supply unit 27, where the power supply unit 27 is configured to supply power to the gateway collection unit 20; the power supply unit 27 comprises a CT power supply unit 270 and a super capacitor 271, wherein the super capacitor 271 is used for continuously supplying power to the gateway acquisition unit 20 when the gateway acquisition unit 20 is suddenly powered off, so as to ensure that the gateway acquisition unit 20 can acquire the power-off information on the last line and the data information at the key node. Optionally, the gateway collecting unit 20 further includes a storage unit, which is capable of storing the power information on the line collected by the gateway collecting unit 20 and the collected data information at the key node.
With continued reference to fig. 4 and 5, the gateway acquisition unit 20 and the gateway data processing unit 10 each include a carrier transceiver unit; the carrier transceiver unit 32 in the gateway acquisition unit 20 is in communication connection with the processor 21 in the gateway acquisition unit 20; the carrier transceiver unit 31 in the gateway data processing unit 10 is in communication connection with the processor 11 in the gateway data processing unit 10 through the protocol adapter 12 in the gateway data processing unit 10; the carrier transceiver unit is used for assisting the topology identification unit 111 in drawing a physical topology connection relation diagram of the power distribution network. Specifically, the carrier transceiver unit 32 in the gateway acquisition unit 20 and the carrier transceiver unit 31 in the gateway data processing unit 10 cooperate with each other, and assist in determining the physical topological connection relationship of the key node by using the transceiver carrier signal.
In summary, the power distribution network fault diagnosis and location gateway provided in the embodiment of the present invention includes a gateway acquisition unit and a gateway data processing unit. When the key node is not provided with the monitoring terminal, the gateway acquisition unit can be set to acquire the data information at the key node. The gateway data processing unit comprises a processor, a communication unit, a protocol adapter and a carrier transceiving unit, and can acquire electrical operation data at each key node in the power distribution network under various different communication protocols, judge whether the electrical operation data at each key node is abnormal or not and draw a physical topological connection relation graph, further realize the correlation diagnosis of each key node according to the judgment result of whether all key nodes are abnormal or not and the physical topological connection relation graph, avoid the conditions of failure missing judgment and misjudgment in the power distribution network, and realize the simple, convenient and accurate positioning of the position section of the fault point of the power distribution network.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A power distribution network fault diagnosis and positioning method is characterized by comprising the following steps:
acquiring data information of a key node of the power distribution network, wherein the data information comprises electrical operation data and identification information;
judging whether the electrical operation data are abnormal or not, and drawing a physical topological connection relation graph of the power distribution network according to the identification information;
the positioning the position interval of the fault point of the power distribution network according to the judgment result of whether the fault is abnormal and the physical topology connection relation diagram comprises the following steps: and comparing the electrical operation data at the abnormal key nodes with the electrical operation data at the non-abnormal key nodes by using the connection relation between the key nodes in the physical topological connection relation graph, so as to judge the position interval of the fault point in the physical topological connection relation graph.
2. The method for diagnosing and positioning the faults of the power distribution network according to claim 1, wherein the method for positioning the position interval of the fault point of the power distribution network according to the judgment result of whether the fault is abnormal and the physical topology connection relation diagram further comprises the following steps:
and sending the data information, the physical topological connection relation graph, the judgment result of whether the fault point is abnormal and the positioning of the position interval of the fault point to a cloud server, so that the cloud server rechecks the judgment result of whether the fault point is abnormal and rechecks the positioning of the position interval of the fault point.
3. The method for diagnosing and positioning the faults of the power distribution network according to claim 1, wherein the positioning of the position interval where the fault point of the power distribution network is located according to the judgment result of whether the fault is abnormal and the physical topology connection relation diagram comprises:
if the judgment result is abnormal, determining the corresponding key node as an abnormal key node;
and comparing the electrical operation data of the abnormal key node with the electrical operation data of the key node adjacent to the abnormal key node in the physical topological connection relation graph in a first round so as to position the position interval of the fault point.
4. The power distribution network fault diagnosis and positioning method according to claim 3, wherein the electrical operation data of the abnormal key node is compared with the electrical operation data of the key nodes adjacent to the abnormal key node in the physical topological connection relation graph for the first round to position the location interval where the fault point is located, and then the method further comprises:
and if the position section where the fault point is located cannot be located in the previous comparison, comparing the electrical operation data of the abnormal key node with the electrical operation data of the key node adjacent to the key node which is subjected to the previous comparison in the physical topological connection relation graph in the next comparison so as to locate the position section where the fault point is located.
5. The power distribution network fault diagnosis and positioning method according to claim 1 or 2, characterized in that after the location interval where the fault point of the power distribution network is located is positioned according to the judgment result of whether the fault is abnormal and the physical topology connection relation diagram; or, after the cloud server rechecks the abnormal result and the location of the location interval where the fault point is located, the method further includes:
positioning the judgment result and the position interval where the fault point is located; or, the rechecking result of the judgment result of whether the fault occurs or not and the rechecking result of the positioning of the position interval where the fault point is located are sent to the client.
6. The method for diagnosing and locating the faults of the power distribution network according to claim 1, wherein the step of obtaining data information of the key nodes of the power distribution network comprises the steps of:
and acquiring data information of the key node from a monitoring terminal arranged at the key node.
7. A distribution network fault diagnosis and positioning gateway is characterized by comprising a gateway acquisition unit and a gateway data processing unit;
the gateway acquisition unit is used for acquiring data information of key nodes of the power distribution network, wherein the data information comprises electrical operation data and identification information;
the gateway data processing unit comprises a processor, a protocol adapter and a communication module; the communication module is in communication connection with the gateway acquisition unit; the processor is in communication connection with the communication module through the protocol adapter, and the protocol adapter is used for completing the conversion of communication protocols among the processor, the communication unit and the gateway acquisition unit;
the processor comprises a data analysis unit and a topology identification unit;
the topology identification unit is used for acquiring identification information of the key node from the gateway acquisition unit through the communication module and drawing a physical topology connection relation graph of the power distribution network according to the identification information;
the data analysis unit is used for acquiring the electrical operation data of the key node from the gateway acquisition unit through the communication module and judging whether the electrical operation data is abnormal or not; the data analysis unit is further configured to, according to the determination result of whether the fault is abnormal or not and the physical topology connection relation diagram, locate a location interval where a fault point of the power distribution network is located, including: and comparing the electrical operation data of the abnormal key nodes with the electrical operation data of the non-abnormal key nodes by using the connection relation among the key nodes in the physical topological connection relation graph, so as to judge the position interval of the fault point in the physical topological connection relation graph.
8. The distribution network fault diagnosis and location gateway of claim 7, wherein the communication unit comprises a wireless communication unit and a wired acquisition convergence interface.
9. The distribution network fault diagnosis and location gateway of claim 7, wherein the gateway acquisition unit comprises a processor, a voltage transformer, a voltage transmitter, a current transformer, a current transmitter, and a communication unit;
the voltage transformer is connected with the processor through the voltage transmitter, and the current transformer is connected with the processor through the voltage transformer; the processor is used for preprocessing the electrical operation data of the key nodes collected by the voltage transformer and the current transformer;
the communication unit is used for transmitting the electrical operation data to the gateway data processing unit.
10. The distribution network fault diagnosis and location gateway of claim 8, wherein the gateway acquisition unit and the gateway data processing unit each comprise a carrier transceiver unit;
the carrier transceiver unit in the gateway acquisition unit is in communication connection with the processor in the gateway acquisition unit; the carrier transceiver unit in the gateway data processing unit is in communication connection with the processor in the gateway data processing unit through the protocol adapter in the gateway data processing unit; the carrier wave receiving and sending unit is used for assisting the topology identification unit in drawing a physical topology connection relation graph of the power distribution network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679824.1A CN111650478B (en) | 2020-07-15 | 2020-07-15 | Power distribution network fault diagnosis and positioning method and gateway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679824.1A CN111650478B (en) | 2020-07-15 | 2020-07-15 | Power distribution network fault diagnosis and positioning method and gateway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111650478A CN111650478A (en) | 2020-09-11 |
| CN111650478B true CN111650478B (en) | 2022-04-12 |
Family
ID=72340687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010679824.1A Active CN111650478B (en) | 2020-07-15 | 2020-07-15 | Power distribution network fault diagnosis and positioning method and gateway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111650478B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112529363A (en) * | 2020-11-17 | 2021-03-19 | 国网浙江省电力有限公司湖州供电公司 | Automatic analysis and automatic optimal reconstruction system and method for power grid faults |
| CN112615431A (en) * | 2020-12-12 | 2021-04-06 | 国网辽宁省电力有限公司葫芦岛供电公司 | Power distribution station fault rapid processing method based on cloud edge cooperation technology |
| CN113504436B (en) * | 2021-07-23 | 2023-05-12 | 广东电网有限责任公司 | Distribution network line disconnection phase-failure diagnosis method and device based on electrical topology |
| CN114021746A (en) * | 2021-10-25 | 2022-02-08 | 天纳能源科技（上海）有限公司 | Virtual metering method, virtual metering appliance, and computer-readable storage medium |
| CN114280505A (en) * | 2021-12-20 | 2022-04-05 | 广东电网有限责任公司 | Power grid connection mode diagnosis method and system |
| CN115586402B (en) * | 2022-12-09 | 2023-03-14 | 安徽中鑫继远信息技术股份有限公司 | Power distribution network fault diagnosis and processing method |
| CN116626540B (en) * | 2023-07-25 | 2023-10-13 | 国网山东省电力公司莱芜供电公司 | Method, system, terminal and storage medium for judging broken line fault interval |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601383A (en) * | 2015-02-09 | 2015-05-06 | 国网四川省电力公司成都供电公司 | Segmented power telecommunication network analysis method |
| CN105140894A (en) * | 2015-08-07 | 2015-12-09 | 许继电气股份有限公司 | Phase difference principle based power distribution network differential protection method |
| CN109064704A (en) * | 2018-08-23 | 2018-12-21 | 广州列丰信息科技有限公司 | A kind of long-range fire-fighting monitoring management method and system based on household Internet of Things gateway |
| CN110488900A (en) * | 2019-09-06 | 2019-11-22 | 重庆三峡学院 | Intelligent accurate agricultural synthesis control system based on WSN |
| CN110703039A (en) * | 2019-10-18 | 2020-01-17 | 国网浙江宁波市奉化区供电有限公司 | Rapid positioning method for distribution network line fault |
| CN110988601A (en) * | 2019-12-24 | 2020-04-10 | 云南电力技术有限责任公司 | Distribution network branch line fault positioning method and device |
| CN111398741A (en) * | 2020-06-03 | 2020-07-10 | 广东电网有限责任公司 | Online fault positioning system and method for power distribution network |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771883B (en) * | 2017-01-22 | 2022-07-26 | 中国电力科学研究院 | Multi-source information power distribution fault positioning method and system based on cloud |
| CN108152663A (en) * | 2017-11-24 | 2018-06-12 | 国网河南省电力公司镇平县供电公司 | A kind of electrical power distribution network fault location method and device |
-
2020
- 2020-07-15 CN CN202010679824.1A patent/CN111650478B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601383A (en) * | 2015-02-09 | 2015-05-06 | 国网四川省电力公司成都供电公司 | Segmented power telecommunication network analysis method |
| CN105140894A (en) * | 2015-08-07 | 2015-12-09 | 许继电气股份有限公司 | Phase difference principle based power distribution network differential protection method |
| CN109064704A (en) * | 2018-08-23 | 2018-12-21 | 广州列丰信息科技有限公司 | A kind of long-range fire-fighting monitoring management method and system based on household Internet of Things gateway |
| CN110488900A (en) * | 2019-09-06 | 2019-11-22 | 重庆三峡学院 | Intelligent accurate agricultural synthesis control system based on WSN |
| CN110703039A (en) * | 2019-10-18 | 2020-01-17 | 国网浙江宁波市奉化区供电有限公司 | Rapid positioning method for distribution network line fault |
| CN110988601A (en) * | 2019-12-24 | 2020-04-10 | 云南电力技术有限责任公司 | Distribution network branch line fault positioning method and device |
| CN111398741A (en) * | 2020-06-03 | 2020-07-10 | 广东电网有限责任公司 | Online fault positioning system and method for power distribution network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111650478A (en) | 2020-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111650478B (en) | Power distribution network fault diagnosis and positioning method and gateway | |
| CN101813740B (en) | System and method for detecting high voltage transmission line faults | |
| KR101180660B1 (en) | Methods and system for utility network outage detection | |
| US7853417B2 (en) | Methods and system for utility network outage detection | |
| CN101448277B (en) | Method, system and device for processing wireless access network faults | |
| CN105591826A (en) | Low voltage power line broadband carrier communication network fault diagnostic device and method | |
| CN101777798A (en) | Wireless transmission-based transformer online monitoring and manufacturer remote monitoring system | |
| CN102591991A (en) | Train data acquisition and management method and train data acquisition and management system | |
| CN103592566A (en) | Wireless communication based power distribution network distributed online monitoring and fault positioning system | |
| KR101476234B1 (en) | Diagnostic system for substation network based on iec 61850 standard | |
| CN201637794U (en) | Transformer on-line monitoring and manufacturer remote monitoring system based on wireless transmission | |
| CN106787169A (en) | A kind of method of multi-data source comparison techniques diagnosis transformer station remote measurement failure | |
| CN106571689A (en) | Online monitoring system for diagnosing substation telemetering fault based on multi-data source comparison technology | |
| CN110649962A (en) | Intelligent optical cable on-line monitoring system and monitoring method | |
| CN106841933B (en) | Transmission line fault comprehensive positioning method and system | |
| CN111641536B (en) | Online testing and diagnosing method for Internet of things equipment | |
| CN106680668A (en) | Power distribution network single-phase earth fault on-line monitoring and positioning system | |
| KR101184160B1 (en) | Method for remote monitering of micro grid electric power quality and thereof for system | |
| CN107680367B (en) | Broadband carrier communication module with transformer area fault diagnosis function | |
| CN104777824A (en) | Substation computer monitoring remote diagnosis system | |
| CN103645417B (en) | A kind of pure internet access-prepositioneddata data acquisition method | |
| CN105158657A (en) | High-voltage switch cabinet partial discharge online monitoring system | |
| CN111817434A (en) | Intelligent monitoring system for distribution network line | |
| CN104483564B (en) | Automatic power-measuring terminal fault data recording equipment and recording method | |
| CN108123752B (en) | EPON precise loop detection method based on geographic information positioning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |