CN113612189B

CN113612189B - Remote control device for leakage relay

Info

Publication number: CN113612189B
Application number: CN202110938741.4A
Authority: CN
Inventors: 吴宇红; 莫金龙; 来骏; 徐国华; 颜文俊; 郑军; 孙先山; 朱宁; 丁文军; 李自清; 纪涛
Original assignee: Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd; Deqing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Current assignee: Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd; Deqing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2023-09-01
Anticipated expiration: 2041-08-16
Also published as: CN113612189A

Abstract

The invention discloses a remote control device of an electric leakage relay, which comprises a remote control module and a self-healing control module, wherein the remote control module comprises a detection mechanism, an analysis processing mechanism and an information transmission mechanism, the detection mechanism and the information transmission mechanism are connected with the analysis processing mechanism, the analysis processing mechanism is connected with the self-healing control module, the self-healing control module comprises an electromagnetic control mechanism, a contact system and a self-healing electromagnetic control mechanism, and the electromagnetic control mechanism and the self-healing electromagnetic control mechanism are connected with the contact system. According to the invention, the detection mechanism is used for collecting data, the analysis processing mechanism is used for carrying out preliminary integration and fault analysis on the data, the information transmission mechanism is used for carrying out transmission, the analysis processing mechanism is connected with the self-healing electromagnetic control mechanism to control the action of the self-healing electromagnetic control mechanism, the self-healing control module is used for carrying out fault recovery, the remote control on the leakage relay is realized, and the fault diagnosis function is realized through the information transmission mechanism.

Description

Remote control device for leakage relay

Technical Field

The invention relates to the technical field of power systems, in particular to a remote control device for a leakage relay.

Background

The leakage relay is an electronic circuit leakage detection and control relay closing (separating) device, and is matched with an alternating current contactor to form a residual current action protector. At present, the low-voltage distribution network leakage protection device becomes a necessary device for low-voltage distribution network leakage protection, plays an important role in preventing line and equipment leakage and personal electric shock, and realizes a relatively perfect three-level leakage protection mode of the low-voltage distribution network total protection, branch protection and household protection after being popularized and applied in great specifications. The electromagnetic AC contactor is also an automatic control device, which is widely used in automatic control circuit and power, distribution and power utilization fields, such as controlling AC (DC) power supply to operate, controlling large-scale equipment to operate in cooperation with a relay, timing control equipment to operate, interlocking control of automatic equipment, starting of a large-capacity motor, etc.

However, in actual operation, due to faults such as burnout of an alternating current contactor coil, artificial malicious blockage, faults of an electromagnetic control mechanism, adhesion or inexact closing of static (movable) contacts and the like, the existing device has no functions of fault diagnosis, communication and the like, and cannot be removed in time after the faults are caused, so that the living electricity consumption of residents and the production electricity consumption of small enterprises are seriously influenced.

As in chinese patent CN101976880B, publication day 2012, 9 and 26, an intelligent device for voltage sag protection, comprising a high-power rectifying circuit D1 and a rectifying circuit D2 connected in parallel to an ac mains supply, and characterized in that: one path of the output power of the high-power rectifying circuit D1 is added to a coil C of an alternating-current contactor through a first switching tube A after passing through a direct-current voltage reduction module R1, the coil C is provided with a clamping control circuit I for judging the state of the alternating-current contactor, and the output end of the clamping control circuit I is connected with a singlechip S through a conversion control circuit J; the other path of the output power supply of the high-power rectifying circuit D1 is connected with a switching power supply module M through a switch Guan Mokuai K, the switching power supply module M comprises four paths of outputs, and the first path of output is applied to a contactor coil loop through a first voltage stabilizing circuit P1, a voltage regulating module R2 and a second switching tube B; the second output is charged by the backup power supply charging module U through the second voltage stabilizing circuit P2; the third output is connected with the driving module T of the first and second switching tubes through a bias power supply P3; the fourth output is used for supplying power for the singlechip through a voltage adjusting module P4; the output end of the voltage adjusting module P4 is connected with a power supply feedback module N, and the output end of the power supply feedback module N is connected with the switching tube module K; the output end of the singlechip S is connected with a first control module E of a first switching tube A and a second control module F of a second switching tube B; the other output end of the singlechip S is also used for controlling a voltage drop control module L through a voltage drop conversion module Q to start a backup power supply module O for providing backup power for a coil loop, and the backup power supply module O is also used for supplying power for the singlechip S through a voltage reduction module V; the singlechip S is also connected with a sampling module H for collecting an output signal of the rectifying circuit D2 and a man-machine interaction and alarm module S1. But only has voltage drop protection function, can not be identified for other fault conditions, has no fault diagnosis, communication and other functions, can not be removed in time after the fault is caused, and has certain limitation.

Disclosure of Invention

The invention aims to solve the technical problems that: the current leakage relay has no fault diagnosis function and communication control function, thereby influencing the technical problem of electricity utilization of the user. A remote control device for a leakage relay having a fault diagnosis function and a communication control function is provided.

In order to solve the technical problems, the invention adopts the following technical scheme: the remote control device for the leakage relay comprises a remote control module and a self-healing control module, wherein the remote control module is used for carrying out communication control, the remote control module comprises a detection mechanism, an analysis processing mechanism and an information transmission mechanism, the detection mechanism and the information transmission mechanism are connected with the analysis processing mechanism, the analysis processing mechanism is connected with the self-healing control module, the self-healing control module comprises an electromagnetic control mechanism, a contact system and a self-healing electromagnetic control mechanism, the electromagnetic control mechanism and the self-healing electromagnetic control mechanism are connected with the contact system, the contact system comprises a fault detection module, and the self-healing electromagnetic control mechanism is connected with the remote control module;

the information transmission mechanism comprises a plurality of communication units, the information transmission mechanism is used for carrying out information transmission fault diagnosis, and the information transmission fault diagnosis process comprises the following steps:

A centralized control device is arranged, and the centralized control device transmits data to other remote control devices of the leakage relay through an information transmission mechanism and receives feedback;

if all feedback data are received, judging that the information transmission is not failed, and ending the failure diagnosis flow;

if part of feedback data is received, the centralized control device replaces a communication unit of the information transmission mechanism, data is transmitted to the remote control device of the leakage relay corresponding to the feedback data which is not received again, and fault diagnosis is carried out on the remote control device of the corresponding leakage relay according to the feedback result;

if the feedback data is not received, the communication unit of the centralized control device replacement information transmission mechanism transmits the data to other remote control devices of the leakage relay again and receives feedback, and whether the centralized control device fails is judged according to the feedback result;

when judging that the centralized control device has information transmission faults, randomly selecting other remote control devices of the leakage relay to be set as a new centralized control device, and carrying out fault diagnosis flow through the new centralized control device;

when the information transmission fault of the remote control device with the leakage relay is diagnosed, generating and uploading early warning information;

And (5) ending the fault diagnosis process after the detection of all the leakage relay remote control devices is finished. The method can unify uploading results after the diagnosis flow is finished, and can also adopt a form of timely diagnosing and uploading in time, namely, immediately recording uploading when the information transmission fault of the remote control device with the leakage relay is found.

And after the centralized control device receives part of feedback data and the communication unit is replaced to carry out fault diagnosis again, if the centralized control device successfully receives the feedback data corresponding to the remote control device of the leakage relay, judging that the previous communication unit corresponding to the remote control device of the leakage relay has faults.

If the feedback data is not received, when the centralized control device successfully receives the feedback data after replacing the communication unit, the communication unit before the centralized control device is indicated to be faulty, and if the feedback data is not received after replacing the communication unit, the two communication units of the information transmission mechanism of the centralized control device are indicated to be faulty, and the centralized control device is replaced, namely, other remote control devices of the leakage relay are selected to be set as new centralized control devices.

Preferably, the contact system further comprises a contact group, a self-healing contact group and a connecting sheet, wherein the contact group and the self-healing contact group are fixedly connected through the connecting sheet, and the fault detection module is arranged on the contact group. The self-healing electromagnetic control mechanism controls the action of the self-healing contact group, and the electromagnetic control mechanism controls the contact group.

Preferably, the contact group comprises a moving contact and a fixed contact, the fault detection module is arranged between the moving contact and the fixed contact, the self-healing contact group comprises a self-healing moving contact and a self-healing fixed contact, and the fixed contact is connected with the self-healing fixed contact through the connecting sheet. When the fault detection module detects a contact group fault in the contact system, fault information is transmitted to the control module in the self-healing electromagnetic control mechanism, the control module controls the self-healing contact group to be electrified, and the self-healing moving contact acts to realize double-path parallel power supply.

Preferably, the fault detection module comprises a base, a temperature sensor, a pressure column, a temperature sensor lead, a contact lead, a normally closed contact and a wiring row, wherein the base is fixedly connected with the fixed contact, the wiring row and the normally closed contact are both connected with the base, the wiring row is connected with the normally closed contact through the contact lead, the pressure column is connected with the wiring row through the temperature sensor lead, and the temperature sensor is fixedly connected with the pressure column. And detecting whether the leakage relay has faults or not through a fault detection module.

Preferably, the information transmission mechanism comprises a 5G communication unit, a lora communication unit and an RS485 unit, and the 5G communication unit, the lora communication unit and the RS485 unit are all connected with the analysis processing mechanism.

The data transmission is mainly carried out through the 5G communication unit, and the information transmission fault diagnosis is carried out through the lora communication unit and the RS485 unit. 3 communication modes are established, so that data communication and task instruction reception are ensured; the remote control device of the leakage relay in the power distribution cabinet is connected with an RS485 communication port, so that a more stable and rapid data transmission channel is established; the remote control device for the leakage relay installed on the branch line or the user side is set as a data centralized control device (for example, a No. 1 leakage relay remote control device is selected) by using the 5G communication module and the lora communication unit for data transmission communication, and the problem that data cannot be normally received or transmitted due to unstable 5G communication network at the junction of remote mountain areas or county areas can be solved by adopting the two-way communication module for data transmission.

Preferably, the temperature sensor is a sheet temperature sensor, and a mounting fixing piece and a wiring groove are arranged on the surface of the sheet temperature sensor. The thin-plate temperature sensor is formed by sealing and pasting a thermistor, a film and positive and negative leads, the appearance is in a right circular shape, and four spring eye-splice mounting fixing pieces are distributed on the round edge at equal intervals. During installation, the lead part of the thin-film temperature sensor is downwards attached to the top of the high-temperature-resistant insulating pressure column, the four spring eye-splice installation fixing pieces are inserted into the pressure column installation holes, the spring pressure is utilized for fixing, in addition, the side face of the pressure column is provided with a lead groove and positive and negative leads, the corresponding installation fixing pieces and the lead groove are used for facilitating the lead wiring of the temperature sensor. The positive and negative leads are connected to the wiring bars through wiring grooves.

Preferably, the remote control module further comprises a test mechanism for assisting in detecting the running state of the leakage relay, the test mechanism is connected with the analysis processing mechanism, and the test mechanism comprises a leakage test circuit. The leakage test circuit of the test mechanism is used for carrying out leakage test and is used for periodically maintaining the leakage relay, so that whether the operation of each mechanism module of the leakage relay is normal or not can be conveniently judged, and the situation that a user is powered off for a long time due to failure of the leakage relay and incapability of knowing the circuit condition in time is prevented; the power supply mechanism can comprise an external power supply, an internal storage power supply such as a lithium battery and the like, the display mechanism can adopt a liquid crystal display, and the storage mechanism can adopt a data storage. In addition, the remote control module further comprises a power supply mechanism, a display mechanism and a storage mechanism for collecting data, wherein the power supply mechanism, the display mechanism and the storage mechanism are all connected with the analysis processing mechanism. The power supply mechanism can comprise an external power supply, an internal storage power supply such as a lithium battery and the like, the display mechanism can adopt a liquid crystal display, and the storage mechanism can adopt a data storage.

Preferably, the electric leakage test is started by the test mechanism, the detection mechanism is controlled by the analysis processing mechanism to collect data and perform fault diagnosis analysis, and the analysis process of the analysis processing mechanism comprises:

A1: the analysis processing mechanism performs preliminary analysis through the data acquired by the detection mechanism;

a2: if the three-phase voltages at the power supply side are all larger than the first preset voltage value and the three-phase voltages at the load side are all 0V, judging that the electromagnetic alternating current contactor operates normally;

a3: if the three-phase voltages of the power supply side are all larger than a first preset voltage value, and the rest phase voltages of the three-phase voltages of the load side, wherein one phase voltage is zero, are larger than a second preset voltage value or the rest phase voltages of the two phases are zero, and are larger than the second preset voltage value, judging that the main static contact and the main static contact of the corresponding phase of the electromagnetic alternating current contactor, the rest phase voltages of which are larger than the second preset voltage value, are suspected to be adhered;

a4: if the three-phase voltages at the power supply side are all larger than the first preset voltage value and the three-phase voltages at the load side are all larger than the second preset voltage value, judging that the electromagnetic control mechanism is in fault;

a5: and (4) acquiring circuit data again at intervals of a period of time T, and performing secondary analysis and diagnosis:

a6: if the three-phase voltages of the power supply side are all larger than the first preset voltage value, the three-phase voltages of the load side are all larger than the first preset voltage value, and the electromagnetic alternating current contactor is judged to operate normally;

a7: if the three-phase voltages at the power supply side are all larger than the first preset voltage value and the three-phase voltages at the load side are all 0V, the coil burnout or the electromagnetic control mechanism fault is judged.

Starting a leakage test through a test mechanism, pressing a leakage test button, and triggering an analog leakage circuit; the leakage relay remote control device is connected with the analysis processing mechanism through the remote control device; the main coil of the electromagnetic alternating-current contactor in the electromagnetic control mechanism is in power-off separation; the analysis processing mechanism controls the detection mechanism to collect data and conduct fault diagnosis analysis.

Preferably, the information transmission mechanism performs information transmission fault diagnosis at least twice daily, and the information transmission fault diagnosis process comprises the following steps:

b1: automatically starting a communication fault diagnosis program at a set time every day;

b2: setting a centralized control device, wherein an analysis processing mechanism of the centralized control device extracts pre-stored diagnosis data for fault diagnosis;

b3: numbering the diagnosis data corresponding to other remote control devices of the leakage relay, and sequentially transmitting the diagnosis data to the remote control devices of the leakage relay corresponding to the numbers through the 5G communication unit at intervals of a certain time x;

b4: the corresponding remote control device of the leakage relay receives diagnosis data, pre-stores the diagnosis data into a corresponding analysis and processing mechanism, and returns the diagnosis data through a lora communication unit at intervals of a certain time x;

B5: the centralized control device receives the diagnosis data and checks, if all the diagnosis data are received, the communication is judged to be normal, and the process is ended; if the diagnosis data is received, the centralized control device transmits the diagnosis data to a remote control device of the leakage relay corresponding to the unreceived diagnosis data through the lora communication unit again;

b6: the corresponding leakage relay remote control device is transmitted back to the centralized control device through the lora communication unit, if the diagnosis data is received normally, the fault of the 5G communication unit of the corresponding leakage relay remote control device is judged, and an analysis processing mechanism of the centralized control device generates and uploads early warning information;

b7: when the centralized control device does not receive the pushed diagnostic data within a certain time y, the analysis processing mechanism of the centralized control device pushes the diagnostic data to each leakage relay remote control device in a point-to-point mode through the lora communication unit, and if the diagnostic data is recovered normally, the 5G communication unit of the centralized control device is judged to be faulty;

b8: after judging that the 5G communication unit of the centralized control device fails, an analysis processing mechanism of the centralized control device sends an instruction for starting other leakage relay remote control devices to be set as the centralized control device, the instruction is transmitted through an RS485 unit, the original centralized control device is set as the leakage relay remote control device to be detected, and the selected leakage relay remote control device is changed into the centralized control device according to the instruction;

B9: and the analysis processing mechanism of the newly selected centralized control device transmits the data of the original centralized control device to the newly selected centralized control device through the RS485 unit. Step B5, steps B5-B6 and steps B7-B9 are respectively processing methods of three cases of full reception of diagnostic data, partial reception of diagnostic data and non-reception of diagnostic data.

Preferably, the information transmission mechanism failure diagnosis process of the centralized control device further includes:

the centralized control device collects the running state data of each leakage relay remote control device in a certain period z through the 5G communication unit and the lora communication unit;

when the data of any one of the leakage relay remote control devices is not received in three continuous periods z, judging whether a 5G communication unit and a lora communication unit of the centralized control device are normal or not;

after judging that the communication unit of the centralized control device has no fault, the analysis processing mechanism of the centralized control device extracts diagnostic data, the diagnostic data are respectively transmitted to the corresponding remote control device of the leakage relay which does not receive the data through the 5G communication unit and the lora communication unit, the remote control device waits for a period of time y, and if the centralized control device does not receive the corresponding diagnostic data, the 5G communication unit and the lora communication unit of the corresponding device are judged to have faults at the same time.

The process of judging whether the 5G communication unit and the lora communication unit of the centralized control device are normal or not is as follows: the centralized control device checks the data receiving condition of other remote control devices of the leakage relay, and if the data receiving condition is normal, the communication unit of the body of the centralized control device is judged to be fault-free; if the data of the other leakage relay remote control devices are not received, judging that the body communication unit is in fault, and randomly replacing the other leakage relay remote control devices into a new centralized control device. The method is used for processing modes of the centralized control device when the centralized control device does not receive feedback data of a certain leakage relay remote control device for a long time in the fault diagnosis process of the supplementary information transmission mechanism.

The invention has the following substantial effects: according to the invention, the detection mechanism is used for collecting data, the analysis processing mechanism is used for carrying out preliminary integration and fault analysis on the data, the information transmission mechanism is used for carrying out transmission, the analysis processing mechanism can be connected with the self-healing electromagnetic control mechanism to control the action of the self-healing electromagnetic control mechanism, the self-healing control module is used for carrying out fault recovery, remote control on the leakage relay is realized, the test mechanism is used for carrying out fault analysis on the leakage relay in combination with the leakage test, and the information transmission mechanism is used for carrying out information transmission fault diagnosis, so that the fault diagnosis function of the leakage relay remote control device is realized.

Drawings

FIG. 1 is a schematic diagram of a remote control module according to an embodiment;

FIG. 2 is a schematic diagram of a self-healing control module according to an embodiment;

FIG. 3 is a diagram of a fault detection module mounting location of an embodiment;

FIG. 4 is a schematic diagram of a fault detection module according to an embodiment;

FIG. 5 is a diagram of a mounting position of a wafer temperature sensor of an embodiment;

fig. 6 is a diagram of a structure of a wafer temperature sensor of the embodiment.

Wherein: 101. 380V power supply, 102, buck circuit, 103, lithium battery, 104, 5G communication module, 105, lora communication module, 106, RS485, 107, leakage test circuit, 108, microprocessor, 109, AD conversion circuit, 110, temperature collector, 111, detection element output and input, 112, voltage conversion circuit, 113, electromagnetic ac contactor load side, 114, electromagnetic ac contactor power side, 115, keyboard input, 116, zero sequence current conversion circuit, 117, zero sequence transformer, 118, current transformer, 119, current conversion circuit, 120, self-healing electromagnetic ac contactor group coil, 121, electromagnetic ac contactor coil, 122, first relay, 123, second relay, 124, third relay, 125, LCD liquid crystal display, 126, memory, 1, electromagnetic control mechanism, 2, self-healing electromagnetic control mechanism, 3, contact system, 31, stationary contact, 32, moving contact, 33, connecting piece, 34, self-healing contact, 35, self-healing contact, 36, fault detection module, 361, temperature sensor, 121, pressure sensor, 367, wire slot, 3611, wiring duct, and wiring duct.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.

The remote control device for the leakage relay comprises a remote control module and a self-healing control module, wherein the remote control module comprises a 380V power supply 101, a voltage reducing circuit 102, a lithium battery 103,5G communication module 104, a lora communication module 105, an RS485106, a leakage test circuit 107, a microprocessor 108, an AD conversion circuit 109, a temperature collector 110, a detection element output and input 111, a voltage conversion circuit 112, an electromagnetic alternating-current contactor load side 113, an electromagnetic alternating-current contactor power supply side 114, a keyboard input 115, a zero-sequence current conversion circuit 116, a zero-sequence transformer 117, a current transformer 118, a current conversion circuit 119, a self-healing electromagnetic alternating-current contactor group coil 120, an electromagnetic alternating-current contactor coil 121, a first relay 122, a second relay 123, a third relay 124, an LCD (liquid crystal display) 125 and a memory 126, as shown in FIG. 1.

The remote control module comprises a detection mechanism, an analysis processing mechanism and an information transmission mechanism, wherein the analysis processing mechanism adopts a microprocessor 108, the detection mechanism comprises a temperature collector 110 and other detection elements for output and access, the analysis processing mechanism can adopt the microprocessor 108 for data preliminary integration and analysis, and the information transmission mechanism is used for transmission, so that the remote receiving and control are facilitated. The detection mechanism and the information transmission mechanism are both connected with the analysis processing mechanism, and the analysis processing mechanism is connected with the self-healing control module. The information transmission mechanism comprises a 5G communication unit, a lora communication unit and an RS485 unit, and the 5G communication unit, the lora communication unit and the RS485 unit are all connected with the analysis processing mechanism. 3 communication modes are established, so that data communication and task instruction reception are ensured; the remote control device of the leakage relay in the power distribution cabinet is connected with an RS485106 communication port, so that a more stable and rapid data transmission channel is established; the remote control device for the leakage relay installed on the branch line or the user side uses the 5G communication module 104+lora communication unit and the power distribution cabinet to set as the data centralized control device (No. 1 remote control device for the leakage relay) for data transmission and communication, and adopts the two-way communication module for data transmission at the same time, so that the problem that data cannot be normally received or transmitted due to unstable 5G communication network at the junction of remote mountain areas or counties can be solved.

The self-healing control module comprises an electromagnetic control mechanism 1, a contact system 3 and a self-healing electromagnetic control mechanism 2, wherein the electromagnetic control mechanism 1 comprises a relay and an electromagnetic alternating-current contactor coil 121, the self-healing electromagnetic control mechanism 2 comprises a self-healing relay and a self-healing electromagnetic alternating-current contactor coil 120, the electromagnetic alternating-current contactor coil 121 can be connected with an analysis processing mechanism through a first relay 122, and the self-healing electromagnetic alternating-current contactor coil 120 can be connected with the analysis processing mechanism through a self-healing relay, namely a second relay 123 and a third relay 124. As shown in fig. 2, the electromagnetic control mechanism 1 and the self-healing electromagnetic control mechanism 2 are both connected with the contact system 3, the contact system 3 is connected with A, B, C in three phases, the contact system 3 further comprises a contact group, a self-healing contact group and a connecting sheet 33, the contact group is fixedly connected with the self-healing contact group through the connecting sheet 33, and the fault detection module 36 is arranged on the contact group. The self-healing electromagnetic control mechanism 2 controls the action of the self-healing contact group, and the electromagnetic control mechanism 1 controls the contact group. The contact group comprises a moving contact 32 and a fixed contact 31, a fault detection module 36 is arranged between the moving contact 32 and the fixed contact 31, the self-healing contact group comprises a self-healing moving contact 35 and a self-healing fixed contact 34, and the fixed contact 31 is connected with the self-healing fixed contact 34 through a connecting sheet 33. When the fault detection module 36 detects the fault of the contact set in the contact system 3, fault information is transmitted to a control module in the self-healing electromagnetic control mechanism 2, the control module controls the self-healing contact set to be electrified, and the self-healing movable contact 35 acts to realize double-path parallel power supply. The analysis processing mechanism can be connected with the self-healing electromagnetic control mechanism 2 to control the self-healing electromagnetic control mechanism 2 to act. The analysis processing mechanism controls the self-healing electromagnetic control mechanism 2 to act or give an alarm when the fault detection module 36 detects the fault of the contact system 3, and the fault of the contact system 3 comprises the following conditions: the contact system 3 has over-high temperature, poor contact of the contact system 3 and insufficient magnetic field of the iron core seat.

The contact system 3 comprises a fault detection module 36, as shown in fig. 3 and 4, and the self-healing electromagnetic control mechanism 2 is connected with a remote control module. The fault detection module 36 includes a base 367, a temperature sensor 361, a pressure column 362, a temperature sensor lead 363, a contact lead 364, a normally closed contact 365, and a wiring line 366, where the base 367 is fixedly connected with the fixed contact 31, the wiring line 366 and the normally closed contact 365 are connected with the base 367, the wiring line 366 and the normally closed contact 365 are connected through the contact lead 364, the pressure column 362 and the wiring line 366 are connected through the temperature sensor lead 363, and the temperature sensor 361 is fixedly connected with the pressure column 362.

As the temperature sensor 361, a sheet temperature sensor 361 may be used, and as shown in fig. 5 and 6, a mounting fixture 3613 and a wiring groove 3614 are provided on the surface of the sheet temperature sensor 361. The thin-plate temperature sensor 361 is formed by sealing and pasting a thermistor, a film and positive and negative leads 3612, the external shape of the thin-plate temperature sensor is a perfect circle, four spring eye-splice mounting fixing pieces 3613 are distributed on the round edge at equal intervals, when the thin-plate temperature sensor is mounted, the lead 363 of the thin-plate temperature sensor is downwards pasted on the top of a high-temperature-resistant insulating pressure column 362, the four spring eye-splice mounting fixing pieces 3613 are aligned with mounting holes of the pressure column 362 and are inserted, the positive and negative leads 3612 are fixed by spring pressure, and the positive and negative leads 3612 are connected to a wiring row 366 through wiring grooves 3614. The pressure column side is provided with a lead slot 3611 and a positive lead 3612, which are convenient for the lead wiring of the temperature sensor.

The remote control module comprises a test mechanism for assisting in maintaining the running state of the leakage relay, the test mechanism is connected with the analysis processing mechanism, and the test mechanism comprises a leakage test circuit 107. The leakage test circuit 107 of the test mechanism is used for carrying out leakage test and is used for periodically maintaining the leakage relay, so that whether the operation of each mechanism module of the leakage relay is normal or not can be conveniently judged, and the situation that a user is powered off for a long time due to failure of the leakage relay and incapability of knowing the circuit condition in time is prevented. The remote control module further comprises a power supply mechanism, a display mechanism and a storage mechanism for collecting data, and the power supply mechanism, the display mechanism and the storage mechanism are all connected with the analysis processing mechanism. The power supply mechanism may include an external power source and an internal storage power source such as a lithium battery 103, the display mechanism may employ a liquid crystal display, and the storage mechanism may employ a data storage 126.

When the test mechanism of the embodiment performs the electric leakage test, the analysis processing mechanism performs detection analysis, and the judging process of the analysis processing mechanism comprises the following steps:

a4: if the three-phase voltages at the power supply side are all larger than the first preset voltage value and the three-phase voltages at the load side are all larger than the second preset voltage value, judging that the electromagnetic control mechanism 1 is in fault;

a7: if the three-phase voltages at the power supply side are all larger than the first preset voltage value and the three-phase voltages at the load side are all 0V, the coil burnout or the electromagnetic control mechanism 1 is judged to be faulty.

One path of the leakage test circuit 107 is connected with the B phase line through a resistor, the other end of the leakage test circuit is connected with the microprocessor 108, when a leakage test button is pressed, the analog leakage circuit is triggered, when the leakage data value of the leakage relay remote control device is reached (the rated residual action current which is arranged in the device is 75-80%), the leakage relay remote control device microprocessor 108 sends an instruction for separating the first relay 122, the main coil of the electromagnetic alternating current contactor is in power-off separation, and the leakage relay remote control device immediately acquires the data of the voltage conversion circuit 112 to perform the following diagnosis: in this embodiment, the first preset voltage value is 195V, the second preset voltage value is 63V, and the interval time T is 30-50S.

Diagnosis 1: the power supply side UA >195V, UB >195V, UC >195V, the load side UA= V, UB = V, UC =0V, and the main static contact 32, the moving contact 32, the coil, the electromagnetic control mechanism 1 and the like of the electromagnetic alternating-current contactor are judged to normally operate;

diagnosis 2: the power supply side UA >195V, UB >195V, UC >195V, the load side ua=0V, UB >63V, UC =0v or UA >63V, UB = V, UC =0v or ua= V, UB = V, UC >63V or UA >63V, UB >63V, UC =0v or ua= V, UB >63V, UC >63V or UA >63V, UB = V, UC >63V, and the main stationary (moving) contact of the U >63V phase is judged to be suspected to be stuck;

diagnosis 3: the power supply side UA >195V, UB >195V, UC >195V and the load side UA >195V, UB >195V, UC >195V, and the electromagnetic control mechanism 1 is judged to be faulty;

after waiting for 30-50S, the remote control device of the leakage relay acquires the data of the voltage conversion circuit 112 again and performs the following diagnosis:

diagnosis 4: the power supply side UA >195V, UB >195V, UC >195V, the load side UA >195V, UB >195V, UC >195V, and the main static contact 32, the movable contact 32, the coil, the electromagnetic control mechanism 1 and the like of the electromagnetic alternating-current contactor are judged to normally operate;

diagnosis 5: the supply side UA >195V, UB >195 > V, UC >195V, the load side ua= V, UB = V, UC =0v, coil burnout or failure of the electromagnetic control mechanism 1.

In this embodiment, the information transmission mechanism performs at least two times of information transmission fault diagnosis every day, and the information transmission fault diagnosis process includes the following steps:

b2: setting a centralized control device, wherein an analysis processing mechanism of the centralized control device extracts pre-stored diagnosis data for fault diagnosis; any one of the remote control devices of the selective leakage relay in the random control area is set as a centralized control device;

b9: and the analysis processing mechanism of the newly selected centralized control device transmits the data of the original centralized control device to the newly selected centralized control device through the RS485 unit.

The remote control device of the No. 1 leakage relay installed on the public transformer side can be set as a unique centralized control device (hereinafter referred to as a centralized control device) in the public transformer by inputting 115 interface through a keyboard of the body device or issuing instructions from a remote server and a mobile phone APP, and is used for regularly collecting normal running state data and real-time early warning data of each leakage relay remote control device and reporting the collected data to a data server through a network operator through a device body 5G communication module 104. The implementation diagnosis data can be two diagnosis data packets with different bytes, the interval time x can be 10S, and the time y can be 40S.

Step 1: automatically initiating a communication fault diagnosis procedure at least at 3:00 and 23:00 of a communication network gap period per day; the fault diagnosis flow of the information transmission mechanism can be carried out for more times in the gap period of the communication network;

step 2: the microprocessor 108 of the centralized control device extracts two diagnosis data packets of 0.5K and 1K pre-stored in the memory 126;

step 3: the microprocessor 108 numbers the 2 diagnosis data packets according to the ID numbers of the remote control devices of the leakage relays installed in the public transformer, then sequentially pushes the data packets to the 5G communication module 104 at intervals of 10S, and transmits the diagnosis data packets to the remote control devices of the leakage relays, such as the remote control devices of No. 3 and No. 4, which correspond to the numbers in the public transformer through a network operator;

step 4: according to the set communication protocol, the remote control device of the leakage relay No. 3 and No. 4 receives 2 diagnosis data packets, the 2 diagnosis data packets are prestored in the microprocessor 108, the 2 diagnosis data packets are pushed to the lora communication unit at intervals of 10S, and the diagnosis device and the centralized control device are adopted to transmit the data packets back in a point-to-point transmission mode;

step 5: the centralized control device receives the diagnosis data packets, checks the receiving conditions one by one according to the ID numbers, receives all the diagnosis data packets, communicates normally, and ends the flow;

Step 6: if the diagnostic data packet of a certain ID number is not received, the microprocessor 108 transmits the 2 diagnostic data packets to the leakage relay remote control device again through the lora communication unit;

step 7: then the information is transmitted back to the centralized control device through the lora communication unit, 2 diagnosis data packets are received normally, the failure of the 5G communication module of the remote control device of the leakage relay is indicated, the microprocessor 108 of the centralized control device generates early warning information, and the early warning information is transmitted to a remote server and an APP (application) of an operation and maintenance personnel through the 5G communication module 104;

step 8: if the centralized control device does not receive any 1 pushed diagnosis data packet in 40S, the microprocessor 108 of the centralized control device pushes 2 diagnosis data packets to each leakage relay remote control device or one of the leakage relay remote control devices, such as the No. 4 leakage relay remote control device, through the lora communication unit in a point-to-point mode, and the data packets are recovered normally, so that a 5G communication module of the centralized control device is indicated to be faulty;

step 9: the microprocessor 108 of the centralized control device sends a command for starting other remote control devices of the leakage relay, such as a remote control device No. 2 leakage relay, to be the centralized control device, and the command is transmitted through the RS485106 communication port, the setting of the original centralized control device is restored to the remote control device of the leakage relay to be detected, such as a remote control device of the leakage relay No. 1, and the remote control device of the leakage relay No. 2 is changed into the centralized control device according to the command;

Step 10: the microprocessor 108 of the new centralized control device (No. 2 leakage relay remote control device) sends a data transfer instruction to the original leakage relay remote control device, namely No. 1 leakage relay remote control device, through the RS485106 communication port, and packages and pushes all data in the device memory 126 to the new centralized control device.

The fault diagnosis process of the information transmission mechanism of the centralized control device of the embodiment further comprises:

The centralized control device adopts a double communication mode of the 5G communication module 104 and the lora communication module 105, generally selects to collect the operation state data of each leakage relay remote control device 1 time every 60 minutes according to a certain period z, if a certain device continuously receives 3 times, namely 180 minutes, no data are received, the centralized control device firstly judges whether the body 5G communication module 104 and the lora communication module 105 are normal or not, checks the data receiving condition of other devices, and can confirm that the body communication has no fault if the receiving is normal; the microprocessor 108 of the centralized control device extracts the memory 1260.5K and 1K2 diagnostic data packets, and transmits the diagnostic data packets to the suspected communication fault device through the 5G communication module 104 and the lora communication module 105 respectively, waits for 40-60S to not receive any diagnostic data packet, and can judge that the 5G communication module 104 and the lora communication module 105 of the device simultaneously fail.

The leakage relay remote control device adopts the integrated design of the leakage relay, the equipment control and the communication terminal, so that the device is reduced, and the cost is lowered. 5G, lora and RS485106, namely 5G and lora dual communication modes, realize synchronous data transmission, improve the transmission reliability and avoid the influence of 5G signal instability at the junctions of remote mountainous areas and county areas on data transmission; secondly, the design of a wired RS485106 communication channel solves the problem of communication between the short-distance installation devices, and the data transmission speed, the quality and the stability rate are obviously improved; thirdly, the erection of the lora communication avoids the problems that the data transmission is influenced by equipment faults of an intermediate operator.

In addition, the fault detection and treatment process for the excessive temperature of the contact system 3 in this embodiment specifically includes the following steps:

c1: the electromagnetic alternating-current contactor operates, a starting button is pressed on the control module, the microprocessor 108 sends a relay energizing instruction, the coil of the electromagnetic alternating-current contactor electromagnetic control mechanism 1 is energized, the movable contact 32 is closed with the fixed contact 31, the alternating-current contactor supplies power normally, the fault detection module 36 is started, and a detection period T, a temperature threshold T0, a temperature change threshold dT0 and a limit fault period number k0 are set;

c2: the fault detection module 36 sends a temperature signal Ti (i=1, 2, …, n) at the junction of the stationary contact and the movable contact to the microprocessor 108 every time t elapses;

and C3: the microprocessor 108 compares the temperature signal Ti with a temperature threshold T0, if the temperature signal Ti does not exceed the threshold, the comparison is continuously performed, and if the temperature signal Ti exceeds the threshold, the detection period is changed to be T/2;

and C4: the microprocessor 108 calculates a temperature change signal dTi (i=1, 2, …, n), dti= (Ti-1)/(t/2), compares dTi with a temperature change threshold dT0, starts a detection cycle count, sets an initial cycle number k=0, and changes the detection cycle to t/4 and t if the temperature change signal dTi is greater than or equal to dT 0; if the temperature change signal 0 is less than or equal to dTi < dT0, maintaining the detection period as t/2; if dTi is less than 0, initializing the detection cycle number k to 0, and executing the step A3; if the detection cycle number k reaches k0, executing the step A5; under the condition that dTi is less than 0, accumulating the cycle number along with the detection times until the cycle number reaches a limit failure cycle number k0;

C5: the microprocessor 108 sends an energizing instruction to the self-healing relay, the coil 120 of the self-healing electromagnetic alternating current contactor group is energized, the self-healing moving contact 35 and the self-healing static contact 34 are closed, the self-healing electromagnetic control mechanism 2 system starts to supply power, the two-way parallel power supply is realized with the electromagnetic control mechanism 1 system, and an alarm of overhigh temperature is sent to a remote server.

The contact system 3 bad contact fault detection and treatment process of the embodiment comprises the following steps:

d1: the microprocessor 108 is connected to the normally closed contact 365 of the access and fault detection module 36 through a detection signal output, and when the electromagnetic ac contactor does not operate, the microprocessor 108 detects that the point is at a high level, and when the electromagnetic ac contactor coil 121 is energized, the microprocessor 108 detects that the point is changed from the high level to a low level, and the electromagnetic ac contactor operates normally. The microprocessor 108 draws out the detection signal and connects to the detection signal output terminal, connect with the normal closed contact 365 of the corresponding group fault detection module 36 according to the lead "+", "-", when the electromagnetic alternating-current contactor does not act, the microprocessor 108 detects this point to be high level, if the electromagnetic alternating-current contactor coil 121 is energized, the protruding point of the fault detection element moves downward because of the pressure effect that the stationary contact and the movable contact touch, the upper portion of the normal closed contact 365 of the fault detection element is upward because of the spring structure effect, make the normal closed contact 365 become normal open, the microprocessor 108 detects this point to change from high level to low level, it is formal that this electromagnetic alternating-current contactor has put into operation.

D2: in the operation process, a normally closed contact 365 level signal is detected in real time, if the signal is in a low level, the contact system 3 is judged to work normally, level signal detection is maintained, when a temperature sensor 361 of a fault detection module 36 protrudes, and due to insufficient magnetic field of a mountain-shaped embedded coil iron core seat, or the fixed contact and the movable contact are burnt out, the movable contact is closed and shifted, so that the contact system 3 is in poor contact, and the like, the normally closed contact 365 of the fault detection element is changed into normally closed from a normally open state when the contact system is normally put into operation, and if the signal is changed from the low level into the high level, the contact system 3 is judged to have poor contact fault, and the step B3 is executed;

d3: the microprocessor 108 sends an energizing instruction to the self-healing electromagnetic control mechanism 2, activates the self-healing electromagnetic ac contactor group, and sends a "bad contact" alarm to a remote server through the 5G communication module.

The fault detection and processing process of the insufficient magnetic field of the iron core seat of the contact system 3 in the embodiment comprises the following steps:

if the microprocessor 108 detects that the voltages of the A\B\C phases are all 0V, and all three groups of detection signals are at high level, judging that the electromagnetic alternating current contactor does not work; when the coil 121 of the electromagnetic alternating-current contactor is electrified and works, detecting that the A\B\C phase voltage is greater than 0V and three groups of detection signals are in low level, and judging that the electromagnetic alternating-current contactor is in normal operation; when detecting that the voltage of any one of the phases A\B\C is 0V, starting counting analysis and judgment, entering 3 rounds of circulation judgment, and when at least 1 time of 0V appears, the microprocessor 108 sends a self-healing relay power-on instruction, the self-healing electromagnetic alternating current contactor group is closed, and a 'magnetic field shortage' alarm is sent to a remote server through the 5G communication module.

The device can be installed on a public transformer side power distribution cabinet. The device consists of a power supply busbar, a remote control device for a leakage relay, an electromagnetic alternating-current contactor fault self-healing device, a current transformer 118, a zero sequence transformer 117 and a low-voltage outlet.

When the electromagnetic type alternating current contactor fault self-healing device is connected with a public transformer side power distribution cabinet, a power supply of the leakage relay remote control device and three incoming lines of the electromagnetic type alternating current contactor fault self-healing device are respectively connected with a low-voltage power distribution cabinet (box) power supply busbar or a main disconnecting link load side in parallel, a temperature sensor lead 363, a fault detection module 36 lead, a main coil and a self-healing coil wiring in the electromagnetic type alternating current contactor fault self-healing device wiring row 366 are respectively connected with a corresponding lead access column of the leakage relay remote control device in a butt joint mode, a main load A, B, C connection column and a self-healing load wiring column of the electromagnetic type alternating current contactor fault self-healing device are connected in parallel, then are led down through A, B, C phase current transformers 118 and are connected with a load fuse through zero sequence transformers 117, A, B, C phase current transformers 118 are connected with detection currents of the leakage relay remote control device, zero sequence transformers 117 aviation plugs are connected with the leakage relay remote control device, and A, B, C phase detection voltage wiring columns are respectively connected with the power supply side and the load side of the electromagnetic type alternating current contactor fault self-healing device.

Remote server communication establishment principle. If more than 2 low-voltage outlet loops appear in the same power distribution cabinet, the No. 1 leakage relay remote control device is set as a data centralized control device, the rest is set as a public transformer control device, and data communication between the two devices is connected by adopting RS 485106.

And the data centralized control device. The method is mainly responsible for pushing the collected running state data and fault early warning data of the respective leakage healing relay control device to a remote server, and simultaneously sending fault early warning short messages, transmitting APP fault data and running states.

And (5) fault handling of the data centralized control device. When the remote server and a No. 1 self-healing leakage relay control device in the power distribution cabinet carry out 5G communication module 104 to answer fault diagnosis, after finding that a push data packet is lack or data is not received, the server issues a task instruction, the No. 2 self-healing leakage relay control device is changed into a data centralized control device, meanwhile, the 5G communication module 104 is started to carry out remote communication, and the task instruction issued by the server also comprises that the No. 2 self-healing leakage relay control device reads all data of the same day in a No. 1 self-healing leakage relay control device memory 126 through RS485106 data;

RS485106 communication port failure handling. After the No. 2 self-healing leakage relay control device fails to read the data of the No. 1 self-healing leakage relay control device by using the RS485106 communication port, the No. 2 self-healing leakage relay control device starts the lora communication module 105 to carry out data transmission communication of the No. 1 self-healing leakage relay control device.

And a power supply circuit. The 380V power supply 101 is connected with a power supply busbar or a main disconnecting link load side of a low-voltage power distribution cabinet (box) in parallel, and then passes through a step-down circuit 102 and a lithium battery 103, so that the power supply guarantee of at least 8 hours after the device operates and power is cut is established.

And a communication module. The 5G communication module 104, the lora communication module 105 and the RS485106 are connected with the microprocessor 108, and 3 communication modes are established to ensure data communication and task instruction reception; the remote control device of the leakage relay in the power distribution cabinet is connected with an RS485106 communication port, so that a more stable and rapid data transmission channel is established; the remote control device for the leakage relay installed on the branch line or the user side uses the 5G communication module 104+lora communication module 105 to perform data transmission communication with the power distribution cabinet as a data centralized control device (No. 1 remote control device for the leakage relay), and adopts the two-way communication module to perform data transmission at the same time, so that the problem that data cannot be normally received or transmitted due to unstable 5G communication network at the junction of remote mountain areas or counties can be solved.

According to the embodiment, the detection mechanism is used for collecting data, the analysis processing mechanism is used for carrying out preliminary integration and fault analysis on the data, the information transmission mechanism is used for transmitting the data, the analysis processing mechanism can be connected with the self-healing electromagnetic control mechanism 2 to control the self-healing electromagnetic control mechanism 2 to act, the self-healing control module is used for carrying out fault recovery, remote control on the leakage relay is achieved, and the leakage test is carried out in combination with the test mechanism to carry out fault analysis on the leakage relay.

In this embodiment, the information transmission mechanism performs information transmission fault diagnosis, and the information transmission fault diagnosis process includes: a centralized control device is arranged, and the centralized control device transmits data to other remote control devices of the leakage relay through an information transmission mechanism and receives feedback; if all feedback data are received, judging that the information transmission is not failed, and ending the failure diagnosis flow; if part of feedback data is received, the centralized control device replaces a communication unit of the information transmission mechanism, data is transmitted to the remote control device of the leakage relay corresponding to the feedback data which is not received again, and fault diagnosis is carried out on the remote control device of the corresponding leakage relay according to the feedback result; if the feedback data is not received, the communication unit of the centralized control device replacement information transmission mechanism transmits the data to other remote control devices of the leakage relay again and receives feedback, and whether the centralized control device fails is judged according to the feedback result; when judging that the centralized control device has information transmission faults, randomly selecting other remote control devices of the leakage relay to be set as a new centralized control device, and carrying out fault diagnosis flow through the new centralized control device; when the information transmission fault of the remote control device with the leakage relay is diagnosed, generating and uploading early warning information; and (5) ending the fault diagnosis process after the detection of all the leakage relay remote control devices is finished. The fault diagnosis function of the remote control device of the leakage relay is realized.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims

1. The remote control device for the leakage relay is characterized by comprising a remote control module and a self-healing control module, wherein the remote control module is used for carrying out communication control, the remote control module comprises a detection mechanism, an analysis processing mechanism and an information transmission mechanism, the detection mechanism and the information transmission mechanism are connected with the analysis processing mechanism, the analysis processing mechanism is connected with the self-healing control module, the self-healing control module comprises an electromagnetic control mechanism (1), a contact system (3) and a self-healing electromagnetic control mechanism (2), the electromagnetic control mechanism (1) and the self-healing electromagnetic control mechanism (2) are connected with the contact system (3), the contact system (3) comprises a fault detection module (36), and the self-healing electromagnetic control mechanism (2) is connected with the remote control module;

and (5) ending the fault diagnosis process after the detection of all the leakage relay remote control devices is finished.

2. The remote control device for the leakage relay according to claim 1, wherein the contact system (3) further comprises a contact group, a self-healing contact group and a connecting sheet (33), the contact group and the self-healing contact group are fixedly connected through the connecting sheet (33), and the fault detection module (36) is arranged on the contact group.

3. The remote control device of the leakage relay according to claim 2, wherein the contact group comprises a moving contact (32) and a fixed contact (31), the fault detection module (36) is arranged between the moving contact (32) and the fixed contact (31), the self-healing contact group comprises a self-healing moving contact (35) and a self-healing fixed contact (34), and the fixed contact (31) and the self-healing fixed contact (34) are connected through the connecting sheet (33).

4. A remote control device for a leakage relay according to claim 3, wherein the fault detection module (36) comprises a base (367), a temperature sensor (361), a pressure column (362), a temperature sensor lead (363), a contact lead (364), a normally closed contact (365) and a wiring line (366), the base (367) is fixedly connected with the stationary contact (31), the wiring line (366) and the normally closed contact (365) are both connected with the base (367), the wiring line (366) is connected with the normally closed contact (365) through the contact lead (364), the pressure column (362) is connected with the wiring line (366) through the temperature sensor lead (363), and the temperature sensor (361) is fixedly connected with the pressure column (362).

5. The remote control device for the leakage relay according to claim 1, wherein the information transmission mechanism comprises a 5G communication unit, a lora communication unit and an RS485 unit, and the 5G communication unit, the lora communication unit and the RS485 unit are all connected with the analysis processing mechanism.

6. The remote control device for the leakage relay according to claim 4, wherein the temperature sensor (361) is a sheet temperature sensor, and a mounting fixture (3613) and a wiring groove (3614) are provided on a surface of the sheet temperature sensor.

7. The remote control device for the leakage relay according to claim 1, wherein the remote control module further comprises a test mechanism for assisting in detecting the operation state of the leakage relay, the test mechanism is connected with the analysis processing mechanism, and the test mechanism comprises a leakage test circuit (107).

8. The remote control device for a leakage relay according to claim 7, wherein the leakage test is started by the test means, the detection means is controlled by the analysis processing means to collect data and perform the fault diagnosis analysis, and the analysis process of the analysis processing means includes:

a4: if the three-phase voltages at the power supply side are all larger than the first preset voltage value and the three-phase voltages at the load side are all larger than the second preset voltage value, judging that the electromagnetic control mechanism (1) fails;

a7: if the three-phase voltages at the power supply side are all larger than the first preset voltage value and the three-phase voltages at the load side are all 0V, the coil burnout or the electromagnetic control mechanism (1) is judged to be faulty.

9. The remote control device for a leakage relay according to claim 5, wherein the diagnosis of the information transmission failure is performed at least twice daily by the information transmission mechanism, and the process of the diagnosis of the information transmission failure comprises the steps of:

10. The remote control device for a leakage relay according to claim 9, wherein the information transmission mechanism failure diagnosis process of the centralized control device further comprises:

when judging that the communication unit of the centralized control device has no fault, the analysis processing mechanism of the centralized control device extracts diagnosis data, the diagnosis data are respectively transmitted to the corresponding remote control device of the leakage relay which does not receive the data through the 5G communication unit and the lora communication unit, the remote control device waits for a period of time y, and if the centralized control device does not receive the corresponding diagnosis data, the 5G communication unit and the lora communication unit of the corresponding device are judged to have faults at the same time.