CN115308528B - Intelligent feeder terminal for accurately positioning single-phase ground fault based on Internet of things technology - Google Patents
Intelligent feeder terminal for accurately positioning single-phase ground fault based on Internet of things technology Download PDFInfo
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- CN115308528B CN115308528B CN202210944197.9A CN202210944197A CN115308528B CN 115308528 B CN115308528 B CN 115308528B CN 202210944197 A CN202210944197 A CN 202210944197A CN 115308528 B CN115308528 B CN 115308528B
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/33—Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Signal Processing (AREA)
- Locating Faults (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a single-phase earth fault accurate positioning system based on the technology of the Internet of things, wherein a feeder terminal FTU and a fault sensor at least comprise one, and the feeder terminal FTU and the fault sensor are connected with an edge gateway ZFTU; the fault sensor and the feeder terminal FTU collect the switch position information, the zero sequence voltage and the zero sequence current of the line and record waves, and send the information to the feeder terminal ZFTU in a wireless communication mode; judging whether the generated faults belong to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform, and transmitting the judging result to the edge gateway ZFTU in a wireless communication mode; the feeder terminal FTU also receives control information of the edge gateway ZFTU, and controls the switching action of the driving switch according to the control information; the edge gateway ZFTU acquires and gathers and analyzes all fault information results judged by the fault sensors and the feeder terminal FTU, and positions a fault occurrence area. The invention can accurately judge the fault section and conduct fault removal.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to an intelligent feeder terminal for accurately positioning a single-phase ground fault based on the internet of things technology.
Background
In the current power grid structure of China, the grounding modes of the central point of the line can be divided into the following different grounding modes: (1) neutral point is directly grounded; (2) the neutral point is grounded through high resistance; (3) the neutral point is grounded through an arc suppression coil; (4) neutral point is not grounded.
After single-phase grounding occurs in the low-current grounding system, the fault phase-to-ground voltage is reduced, the phase voltage of the non-fault two phases is increased, but the line voltage is still symmetrical, and the system can still run for 1-2 h because the continuous power supply to a user is not influenced by the surface. This is also the greatest advantage of low current grounding systems, however the new standard specifies that "2 hours of operation with faults have not been adapted to the requirements of safe and stable operation of the present distribution network, and that the faults should be isolated quickly and nearby after the transient ground fault has been avoided.
The control equipment or the fault indication equipment is arranged on the line, the control equipment does not perform particularly effective fault treatment on the single-phase earth fault, so that the currently-arranged control equipment (such as an FTU) cannot adapt to the single-phase earth fault; the development of fault indicators is the mainstream method and technology for solving the single-phase grounding problem at present, but the fault indicators cannot cut off faults nearby in situ, so that the fault range is easily expanded, more equipment faults or fires are caused.
Therefore, how to provide an intelligent feeder terminal for accurately positioning a single-phase ground fault based on the internet of things technology is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an intelligent feeder terminal for accurately positioning single-phase ground faults based on the Internet of things technology
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a single-phase earth fault accurate positioning system based on the technology of the Internet of things comprises: feeder terminal FTU, fault sensor and edge gateway ZFTU;
the feeder terminal FTU and the fault sensor at least comprise one, and the feeder terminal FTU and the fault sensor are connected with the edge gateway ZFTU;
the fault sensor is used for collecting zero-sequence voltage and zero-sequence current on a line and recording waves and sending the zero-sequence voltage and the zero-sequence current to the feeder terminal ZFTU in a wireless communication mode; judging whether the generated faults belong to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform, and sending a judging result to the edge gateway ZFTU in a wireless communication mode;
the feeder terminal FTU is used for collecting the switch position information, the zero sequence voltage and the zero sequence current of the line and recording waves, and transmitting the information, the zero sequence voltage and the zero sequence current to the feeder terminal ZFTU in a wireless communication mode; judging whether the generated faults belong to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform, and sending a judging result to the edge gateway ZFTU in a wireless communication mode; the control information is used for receiving the control information of the edge gateway ZFTU and controlling the switching action of the driving switch according to the control information;
and the edge gateway ZFTU is used for acquiring and summarizing and analyzing all fault information results judged by the fault sensors and the feeder terminal FTU, and positioning a fault occurrence area.
Preferably, each of the fault sensors includes: the fault acquisition and recording unit, the fault judging unit and the wireless communication unit are sequentially connected;
the fault acquisition and wave recording unit is used for acquiring the zero sequence voltage and the zero sequence current on the line and recording waves;
the fault judging unit is used for judging whether the generated fault belongs to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform;
the wireless communication unit is used for sending the fault judgment result, the zero sequence voltage, the zero sequence current and the waveform data to the edge gateway ZFTU in a wireless communication mode.
Preferably, each feeder terminal FTU includes: the device comprises a fault acquisition and recording unit, a fault judging unit, a switch acquisition unit, a driving unit and a wireless communication unit;
the fault acquisition and wave recording unit is used for acquiring the zero sequence voltage and the zero sequence current on the line and recording waves;
the fault judging unit is used for judging whether the generated fault belongs to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform;
the switch acquisition unit is used for acquiring switch position information of the line;
the driving unit is used for receiving the control information of the edge gateway ZFTU and controlling the switching action of the driving switch according to the control information;
the wireless communication unit is used for sending the switch position information, the fault judgment result, the zero sequence voltage, the zero sequence current and the waveform data to the edge gateway ZFTU in a wireless communication mode, and sending control information for controlling the switching action of the switch to the driving unit.
Preferably, the feeder terminal FTU further includes a CPU, a sampling unit, and a GPS/beidou time synchronization unit;
the CPU is respectively connected with the fault judging unit, the wireless communication unit, the sampling unit and the GPSS/Beidou time setting unit and used for controlling each unit to complete work;
the sampling unit is connected with the fault sensor and is used for sampling the fault sensor;
the GPS/Beidou time setting unit is used for realizing positioning and time setting of the GPS/Beidou time setting unit.
Preferably, the feeder terminal FTU further includes a power supply, a display, an LED lamp, and a key;
the power supply is used for supplying power to the feeder terminal FTU;
the display is connected with the CPU through a serial port and used for displaying related data information;
the LED lamp is connected with the power supply and used for indicating whether the power is on or not;
the key is connected with the CPU and is used for inputting information or sending a control instruction to the CPU.
Compared with the prior art, the invention discloses a single-phase earth fault accurate positioning system based on the internet of things technology, the invention utilizes the internet of things technology to transmit fault sensor data to a feeder terminal FTU, a feeder combines line multipoint fault signals, zero sequence voltage and zero sequence current recording data to carry out comprehensive analysis, and adopts zero sequence current analysis to carry out section selection and interval determination, so that fault sections can be accurately judged, and further fault removal can be rapidly completed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a feeder terminal FTU structure provided in an embodiment of the present invention;
fig. 2 is a schematic diagram of a fault line according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a single-phase earth fault accurate positioning system based on the technology of the Internet of things, which comprises the following steps: feeder terminal FTU, fault sensor and edge gateway ZFTU;
the feeder terminal FTU and the fault sensor at least comprise one, and the feeder terminal FTU and the fault sensor are connected with the edge gateway ZFTU;
the fault sensor is used for collecting zero-sequence voltage and zero-sequence current on a line and recording waves and sending the zero-sequence voltage and the zero-sequence current to the feeder terminal ZFTU in a wireless communication mode; judging whether the generated faults belong to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform, and transmitting the judging result to the edge gateway ZFTU in a wireless communication mode;
the feeder terminal FTU is used for collecting the switch position information, the zero sequence voltage and the zero sequence current of the line and recording waves, and transmitting the information, the zero sequence voltage and the zero sequence current to the feeder terminal ZFTU in a wireless communication mode; judging whether the generated faults belong to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform, and transmitting the judging result to the edge gateway ZFTU in a wireless communication mode; the control information is used for receiving control information of the edge gateway ZFTU, and the switching action of the driving switch is controlled according to the control information;
and the edge gateway ZFTU is used for acquiring and summarizing and analyzing fault information results judged by all fault sensors and the feeder terminal FTU, and positioning a fault occurrence area.
In order to further implement the above technical solution, each fault sensor includes: the fault acquisition and recording unit, the fault judging unit and the wireless communication unit are connected in sequence;
the fault acquisition and wave recording unit is used for acquiring zero-sequence voltage and zero-sequence current of the line and recording waves;
the fault judging unit is used for judging whether the generated fault belongs to the boundary according to the fault characteristics of the zero-sequence voltage waveform and the zero-sequence current waveform;
and the wireless communication unit is used for transmitting the fault judgment result, the zero sequence voltage, the zero sequence current and the waveform data to the edge gateway ZFTU in a wireless communication mode.
In order to further implement the above technical solution, each feeder terminal FTU includes: the device comprises a fault acquisition and recording unit, a fault judging unit, a switch acquisition unit, a driving unit and a wireless communication unit;
the fault acquisition and wave recording unit is used for acquiring zero-sequence voltage and zero-sequence current of the line and recording waves;
the fault judging unit is used for judging whether the generated fault belongs to the boundary according to the fault characteristics of the zero-sequence voltage waveform and the zero-sequence current waveform;
the switch acquisition unit is used for acquiring the switch position information of the line;
the driving unit is used for receiving the control information of the edge gateway ZFTU and controlling the switching action of the driving switch according to the control information;
and the wireless communication unit is used for transmitting the switch position information, the fault judgment result, the zero sequence voltage, the zero sequence current and the waveform data to the edge gateway ZFTU in a wireless communication mode, and transmitting control information for controlling the switching action of the switch to the driving unit.
In this embodiment, the wireless communication units are all in a 4G mobile communication mode.
In order to further implement the technical scheme, the feeder terminal FTU further comprises a CPU, a sampling unit and a GPS/Beidou time setting unit;
the CPU is respectively connected with the fault judging unit, the wireless communication unit, the sampling unit and the GPSS/Beidou time setting unit and used for controlling each unit to complete work;
the sampling unit is connected with the fault sensor and is used for sampling the fault sensor;
and the GPS/Beidou time setting unit is used for realizing positioning and time setting of the GPS/Beidou time setting unit.
In order to further implement the above technical scheme, the feeder terminal FTU further includes a power supply, a display, an LED lamp and a key;
the power supply is used for supplying power to the feeder terminal FTU;
the display is connected with the CPU through a serial port and used for displaying related data information;
the LED lamp is connected with the power supply and used for indicating whether the power is on or not;
the key is connected with the CPU and used for inputting information or sending control instructions to the CPU.
In the embodiment, the CPU adopts an AM3352 chip, the display adopts an STM32F103 chip, the power supply adopts 24V rated input, and the range is 18-36V;
the opening amount is isolated by adopting photoelectricity; the method comprises 11 paths of opening quantity;
the opening amount is 3 paths, the remote control is switched on and off, and the total energy storage is 3 paths of remote control signals;
2 paths of network ports are expanded through FSMC of the CPU;
the feeder terminal FTU architecture of this embodiment is shown in fig. 1, where a core board is used to mount chips such as a CPU, a sram, and a FLASH, and is a core of the whole system, and the main board includes a core board, and includes peripheral devices such as a serial port, a network port, an opening, and the like, and the analog board is a device for collecting voltage and current sensors, and sampling dc.
The invention will be further illustrated with reference to the following examples:
different fault sensors and Feeder Terminals (FTU) are configured to be transmitted to a certain fixed edge gateway (ZFTU), and the ZFTU has edge computing capability and can comprehensively analyze and judge data information. All devices on one line can capture fault characteristics according to single-phase earth fault information, and if the fault information is at the upstream of the device or is not in a power supply area of the device, the fault is reported outside the boundary; if the fault information is downstream or in the power supply area of the equipment, reporting an internal fault;
1 enhanced FTU,6 common FTUs and 14 sensors are arranged on the circuit of FIG. 2; when a fault occurs at a certain point, the FTU and the fault sensor can judge the fault according to the fault characteristics and send a fault signal to the edge gateway ZFTU; after receiving the FTU terminal and the sensor signals, the ZFTU judges by combining the topology;
if a single-phase earth fault occurs at the fault position in the graph; FTU1-6 sends fault information to ZFTU terminal, sensor LTU1-11 sends fault information to ZFTU intelligent terminal; the ZFTU gathers through all fault information according to fault characteristics: the first half wave of the fault path is characterized in that the zero sequence voltage and the zero sequence current are opposite in direction; the zero sequence voltage and the zero sequence current of the non-fault path have the same direction; after the FTU1, the LTU2, the LTU4 and the LTU6 are analyzed on a fault path, fault signals and fault waveform characteristics in the boundary are reported; other terminals report out-of-limit faults, and waveform features are out-of-limit features; the acknowledgement is between LTU6 and LTU9 (LTU 8).
ZFTU to make analytical decisions: in the fault judging process, a misjudged terminal can exist, and ZFTU analyzes according to the data of other terminals and compares the characteristic data of the multi-point waveforms; selectively discarding some data, realizing accurate positioning of faults by using regional data analysis of the Internet of things, improving the accuracy of fault judgment and reducing the time of fault searching.
The more installed equipment is, the more accurate fault location can be, and the mode that FTU and sensor combined is adopted simultaneously, also can improve location section precision, simultaneously reduce cost.
Based on the existing FTU circuit and function, the communication function and fault signals between the devices are increased, zero sequence voltage is also adopted, zero sequence current recording data is adopted, the communication adopts a wireless communication mode, so that the data between the devices can be interacted, the data of multiple points of the line are concentrated together, and the analysis data is comprehensively judged; the FTU and the fault sensor have fault wave recording functions, firstly single-point wave recording data are used for judging faults, and fault signals are uploaded to an FTU feeder terminal (edge gateway); the scheme is to analyze the multi-point fault recording data and judge the single-phase earth fault phase and the fault section.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A single-phase earth fault accurate positioning system based on the internet of things technology is characterized by comprising: feeder terminal FTU, fault sensor and edge gateway ZFTU;
the feeder terminal FTU and the fault sensor at least comprise one, and the feeder terminal FTU and the fault sensor are connected with the edge gateway ZFTU;
the fault sensor is used for collecting zero-sequence voltage and zero-sequence current on a line and recording waves and sending the zero-sequence voltage and the zero-sequence current to the edge gateway ZFTU in a wireless communication mode; judging whether the generated faults belong to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform, and sending a judging result to the edge gateway ZFTU in a wireless communication mode;
each fault sensor comprises: the fault acquisition and recording unit, the fault judging unit and the wireless communication unit are sequentially connected;
the fault acquisition and wave recording unit is used for acquiring the zero sequence voltage and the zero sequence current on the line and recording waves;
the fault judging unit is used for judging whether the generated fault belongs to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform;
the wireless communication unit is used for sending the fault judgment result, the zero sequence voltage, the zero sequence current and the waveform data to the edge gateway ZFTU in a wireless communication mode;
the feeder terminal FTU is used for collecting the switch position information, the zero sequence voltage and the zero sequence current of the line and recording waves, and transmitting the information to the edge gateway ZFTU in a wireless communication mode; judging whether the generated faults belong to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform, and sending a judging result to the edge gateway ZFTU in a wireless communication mode; the control information is used for receiving the control information of the edge gateway ZFTU and controlling the switching action of the driving switch according to the control information;
the feeder terminal FTU includes: the device comprises a fault acquisition and recording unit, a fault judging unit, a switch acquisition unit, a driving unit and a wireless communication unit;
the fault acquisition and wave recording unit is used for acquiring the zero sequence voltage and the zero sequence current on the line and recording waves;
the fault judging unit is used for judging whether the generated fault belongs to the boundary according to the fault characteristics of the zero sequence voltage waveform and the zero sequence current waveform;
the switch acquisition unit is used for acquiring switch position information of the line;
the driving unit is used for receiving the control information of the edge gateway ZFTU and controlling the switching action of the driving switch according to the control information;
the wireless communication unit is used for sending the switch position information, the fault judgment result, the zero sequence voltage, the zero sequence current and the waveform data to the edge gateway ZFTU in a wireless communication mode, and sending control information for controlling the switching action of the switch to the driving unit;
the feeder terminal FTU also comprises a CPU, a sampling unit and a GPS/Beidou time setting unit, wherein the CPU is respectively connected with the fault judging unit, the wireless communication unit, the sampling unit and the GPS/Beidou time setting unit and used for controlling each unit to complete work; the sampling unit is connected with the fault sensor and is used for sampling the fault sensor; the GPS/Beidou time setting unit is used for realizing positioning and time setting of the GPS/Beidou time setting unit;
the edge gateway ZFTU is used for acquiring and summarizing and analyzing all fault information results judged by the fault sensors and the feeder terminal FTU, and positioning a fault occurrence area; if a misjudged terminal exists when the fault is judged, the edge gateway ZFTU selectively gives up part of data according to data analysis of other terminals and comparison of multi-point waveform characteristic data, and the accurate positioning of the fault is realized by using regional data analysis of the Internet of things.
2. The precise positioning system of single-phase earth fault based on the internet of things technology according to claim 1, wherein the feeder terminal FTU further comprises a power supply, a display, an LED lamp and a key;
the power supply is used for supplying power to the feeder terminal FTU;
the display is connected with the CPU through a serial port and used for displaying related data information;
the LED lamp is connected with the power supply and used for indicating whether the power is on or not;
the key is connected with the CPU and is used for inputting information or sending a control instruction to the CPU.
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| CN202210944197.9A CN115308528B (en) | 2022-08-05 | 2022-08-05 | Intelligent feeder terminal for accurately positioning single-phase ground fault based on Internet of things technology |
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| CN202210944197.9A CN115308528B (en) | 2022-08-05 | 2022-08-05 | Intelligent feeder terminal for accurately positioning single-phase ground fault based on Internet of things technology |
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