CN105244854B - A kind of electric arc light protection method with 360 degree of omnidirectional's monitorings and NFC monitoring functions - Google Patents

Abstract

The invention discloses an arc light protection method with 360-degree omnidirectional monitoring and NFC monitoring functions. The inspection personnel wear portable arc light sensors, and use the NFC hand-held inspection terminal and the NFC installed in the arc light portable sensor or arc light protection device. The modules communicate with each other and send the collected inspection data to the NFC inspection system; the arc light portable sensor communicates with the arc light protection device in real time through the wireless transceiver and switch, and follows the inspection personnel to complete the arc light directional monitoring, and the arc light protection device The 360-degree all-round arc light monitoring of the first transformer terminal and the second transformer terminal, as well as the terminals connected to the first low-voltage busbar and the second low-voltage busbar is completed through the transparent optical fiber sensor. The invention adopts a distributed mode design, is suitable for medium and low voltage double busbar protection, has flexible networking characteristics, and can communicate interactively with the NFC inspection system, and can complete 360-degree omni-directional arc detection without dead angles through transparent optical fibers.

Description

An arc light protection method with 360-degree omnidirectional monitoring and NFC monitoring functions

technical field

The invention relates to the field of arc protection, in particular to an arc protection method with 360-degree omnidirectional monitoring and NFC monitoring functions.

Background technique

In the power system, busbars with a voltage level of 35kV and below are generally not equipped with busbar protection. However, due to the large number of outgoing lines on the medium and low voltage busbars, frequent operations, and the distance between the three-phase conductor lines and the earth is relatively close, it is easy to be harmed by small animals, and the quality of equipment manufacturing is worse than that of high-voltage equipment. Poor conditions, changes in system operating conditions, human and operational errors and other reasons, the failure probability of medium and low voltage buses is much higher than that of high voltage and ultra high voltage buses. But for a long time, people have not paid enough attention to the protection of medium and low voltage buses, and no advanced and reasonable solutions have been found. expansion, resulting in huge economic losses. In recent years, due to various reasons, medium and low-voltage switchgears have been severely burned, and some have even developed into serious fire disasters. The accidents of main transformers damaged by external short-circuit current impacts have also increased year by year, and these distribution network accidents have been improperly handled and even enlarged. It has developed into a transmission network accident and caused significant economic losses, which has aroused widespread concern in the power sector. The reason is mostly because there is no medium and low voltage busbar protection, and the failure to quickly remove the fault is caused. Therefore, in order to ensure the safe operation of transformers and busbar switchgear, according to the requirements of rapid relay protection, it is urgent to configure a special medium and low voltage busbar protection, which can simultaneously protect busbars and feeders. A main control type with 360-degree omnidirectional monitoring Arc protection method with NFC monitoring function.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide an arc light protection method with 360-degree omnidirectional monitoring and NFC monitoring functions.

The object of the present invention is achieved through the following technical solutions: an arc light protection method with 360-degree omnidirectional monitoring and NFC monitoring functions, comprising the following steps:

S1, inspectors wear portable arc light sensors, communicate with NFC modules installed in portable arc light sensors or arc light protection devices through NFC handheld inspection terminals, and send the collected inspection data to the NFC inspection system.

S2, the arc light portable sensor communicates with the arc light protection device in real time through the wireless transceiver and switch, and follows the inspectors to complete the arc light directional monitoring.

S3, the arc light protection device performs real-time arc light detection on the first transformer end through the arc light sensor to detect whether there is arc light, and monitors the current signal of the first transformer in real time through the first current sensor to detect the current increment; if arc light or current abnormality is detected , and through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the arc light protection device disconnects the high-voltage side circuit breaker or low-voltage side circuit breaker of the first transformer.

S4, the current protection unit performs real-time arc detection on the second transformer end through the arc sensor to detect whether there is an arc, monitors the current signal of the second transformer in real time through the second current sensor, and detects the current increment; if the arc is detected or the current is abnormal, And through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the current protection unit disconnects the high-voltage side circuit breaker or the low-voltage side circuit breaker of the second transformer.

S5, the arc protection device and the current protection unit communicate with each other through the switch.

S6, the arc protection device also communicates with multiple arc extension units through the switch, and the arc extension units respectively perform arc detection on the monitored equipment under the first low-voltage bus and the monitored equipment under the second low-voltage bus through the arc sensor.

S601. If an arc alarm is detected on the monitored equipment under the first low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the first low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and the second low-voltage busbar.

S602. If an arc alarm is detected on the monitored equipment under the second low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the second low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and the second low-voltage busbar.

The arc light sensor includes a transparent optical fiber sensor, and the transparent optical fiber sensor includes a transparent optical fiber through which 360-degree arc light monitoring is completed and a ring monitoring network is formed through the transparent optical fiber.

Further, the arc light portable sensor includes an arc light sensor probe, an NFC module and a portable connector, the NFC module is arranged in the arc light sensor probe, and the arc light sensor probe is installed on the portable connector.

Further, the portable connecting piece is a pendant, an adhesive piece, an absorbing piece, a fastener or a clamping piece, which is installed on the body of the inspector by means of mounting, sticking, absorbing, fastening or clamping.

Further, the inspectors wear the work clothes of the arc light portable sensor, and are provided with an NFC tag storing the information of the inspector, and the NFC tag is set at the wearing place of the arc light portable sensor.

Further, the arc protection device also uses the feeder protection unit for centralized feeding protection, and the arc protection device also monitors the environmental conditions of the monitored equipment in real time through the working condition monitoring unit.

Further, the working condition monitoring unit includes a temperature and humidity sensor, a wireless temperature sensor, a combustible gas sensor, a wireless humidity sensor, a leakage current detection unit and a leakage current sensor.

Further, in the arc light portable sensor, the arc light signal collected by the arc light sensor probe is also sequentially processed through a follower circuit, a conditioning circuit, an anti-interference circuit, a voltage-controlled current source, a polarity adaptive circuit and a protection circuit.

Further, the NFC handheld inspection terminal includes an NFC smart phone.

Further, the transparent optical fiber includes a glass optical fiber, a filling layer, a filter layer, a metal layer and a protective layer in sequence from inside to outside.

Further, the transparent optical fiber sensor also includes two connectors, and the connectors are respectively arranged at two ends of the transparent optical fiber.

Further, the transparent optical fiber sensor also includes a connector, a sensor joint and a directional arc sensor, one end of the transparent optical fiber is connected to the connector, and the other end of the transparent optical fiber is connected to the directional arc sensor through a sensor joint.

The beneficial effects of the present invention are: the present invention adopts a distributed mode design, is suitable for medium and low voltage double busbar protection, and has flexible networking characteristics. Among them, the feeder protection unit can independently form a minimum protection system, and protect the feeder alone to reduce the scope of accidental power outages. The feeder unit can also operate in a centralized monitoring mode, dispatching communication through the arc protection device. The arc light protection of the present invention adopts the detection of arc light and current as input, and can be used as overcurrent protection, pure arc light protection, and double criterion protection of arc light and overcurrent. This system has the advantages of simple principle, reliable and rapid action, no special requirements for primary equipment, and adaptable to various operating modes.

The invention creatively adds an NFC near-field sensing module to the arc light portable sensor, and adds a portable connector. When the inspection staff performs inspection tasks, the invention can be directly mounted, pasted, adsorbed, fastened or It is installed on the body in a clamping manner for directional arc detection. At the same time, the inspector can communicate with the NFC module on the arc sensor with the NFC tag on the inspector or the NFC inspection handheld terminal to transmit or modify the data in the memory. And transmit the inspection data to the NFC inspection system.

The present invention enables the arc light protection device to complete 360-degree omni-directional detection without dead angle through the transparent optical fiber. The transparent optical fiber is also provided with a filter layer to effectively filter visible light or ultraviolet light, and can also be installed through a suspension ring, which is convenient for installation. In the present invention, a directional arc light sensor can be arranged at the head of the transparent optical fiber to facilitate directional detection. In the present invention, each component adopts a modular design, which is convenient for installation and maintenance.

Description of drawings

Fig. 1 is a system structure diagram of a 360-degree omni-directional ring network arc protection system of the present invention;

Fig. 2 is a structural diagram of the transparent optical fiber of the present invention;

3 is a schematic diagram of Embodiment 1 of the annular fiber optic arc sensor of the present invention;

4 is a schematic diagram of Embodiment 2 of the annular fiber optic arc sensor of the present invention;

Fig. 5 is the structural block diagram of arc light portable sensor of the present invention;

6 is a schematic diagram of the front panel of the arc protection device of the present invention;

In the figure, 1-glass optical fiber, 2-filling layer, 3-filter layer, 4-metal layer, 5-protective layer, 6-hanging ring, 7-transparent optical fiber, 8-connector, 9-directional arc sensor, 10 -processor, 11-casing, 12-liquid crystal display, 13-LED indicator, 14-function buttons, 15-wizard buttons, 16-installation board.

Detailed ways

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

An arc light protection method with 360-degree omnidirectional monitoring and NFC monitoring functions, comprising the following steps:

S1, inspectors wear portable arc light sensors, communicate with NFC modules installed in portable arc light sensors or arc light protection devices through NFC handheld inspection terminals, and send the collected inspection data to the NFC inspection system.

S2, the arc light portable sensor communicates with the arc light protection device in real time through the wireless transceiver and switch, and follows the inspectors to complete the arc light directional monitoring.

S3, the arc light protection device performs real-time arc light detection on the first transformer end through the arc light sensor to detect whether there is arc light, and monitors the current signal of the first transformer in real time through the first current sensor to detect the current increment; if arc light or current abnormality is detected , and through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the arc light protection device disconnects the high-voltage side circuit breaker or low-voltage side circuit breaker of the first transformer.

S4, the current protection unit performs real-time arc detection on the second transformer end through the arc sensor to detect whether there is an arc, monitors the current signal of the second transformer in real time through the second current sensor, and detects the current increment; if the arc is detected or the current is abnormal, And through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the current protection unit disconnects the high-voltage side circuit breaker or the low-voltage side circuit breaker of the second transformer.

S5, the arc protection device and the current protection unit communicate with each other through the switch.

S6, the arc protection device also communicates with multiple arc extension units through the switch, and the arc extension units respectively perform arc detection on the monitored equipment under the first low-voltage bus and the monitored equipment under the second low-voltage bus through the arc sensor.

S601. If an arc alarm is detected on the monitored equipment under the first low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the first low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and the second low-voltage busbar.

S602. If an arc alarm is detected on the monitored equipment under the second low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the second low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and the second low-voltage busbar.

The arc light sensor includes a transparent optical fiber sensor, and the transparent optical fiber sensor includes a transparent optical fiber 7 through which 360-degree arc light monitoring is completed and a ring monitoring network is formed through the transparent optical fiber 7 .

Further, the arc light portable sensor includes an arc light sensor probe, an NFC module and a portable connector, the NFC module is arranged in the arc light sensor probe, and the arc light sensor probe is installed on the portable connector.

Further, the portable connecting piece is a pendant, an adhesive piece, an absorbing piece, a fastener or a clamping piece, which is installed on the body of the inspector by means of mounting, sticking, absorbing, fastening or clamping.

Further, the inspectors wear the work clothes of the arc light portable sensor, and are provided with an NFC tag storing the information of the inspector, and the NFC tag is set at the wearing place of the arc light portable sensor.

Further, the arc protection device also uses the feeder protection unit for centralized feeding protection, and the arc protection device also monitors the environmental conditions of the monitored equipment in real time through the working condition monitoring unit.

Further, the working condition monitoring unit includes a temperature and humidity sensor, a wireless temperature sensor, a combustible gas sensor, a wireless humidity sensor, a leakage current detection unit and a leakage current sensor.

Further, in the arc light portable sensor, the arc light signal collected by the arc light sensor probe is also sequentially processed through a follower circuit, a conditioning circuit, an anti-interference circuit, a voltage-controlled current source, a polarity adaptive circuit and a protection circuit.

Further, the NFC handheld inspection terminal includes an NFC smart phone.

As shown in Figure 1, Figure 1 is a real-time distributed monitoring system on which the arc protection monitoring method of the present invention depends, including an arc protection device, one or more arc extension units, a transparent optical fiber 7, a portable arc sensor, and a wireless transceiver , a current protection unit, a feeder protection unit and a working condition monitoring unit, the arc protection device is respectively connected to the current protection unit and one or more arc extension units through a switch, and the arc extension unit is connected to the 360 through a connector 8 The transparent optical fiber 7 for omni-directional arc light detection is connected, the arc light protection device is also connected to the arc light portable sensor through a wireless transceiver, the arc light protection device is also connected to the NFC inspection system through a switch, and the arc light portable sensor includes an arc light The sensor probe, the NFC module and the portable connector, the NFC module is arranged in the arc sensor probe, and the arc sensor probe is installed on the portable connector.

Further, as shown in FIG. 2 , the transparent optical fiber 7 includes a glass optical fiber 1 , a filling layer 2 , a filter layer 3 , a metal layer 4 and a protective layer 5 sequentially from inside to outside.

Further, as shown in FIG. 3 , the transparent optical fiber sensor further includes two connectors 8 , and the connectors 8 are respectively arranged at both ends of the transparent optical fiber 7 . In this connection direction, the transparent optical fiber sensor collects the arc light signal through the transparent optical fiber 7, and transmits the arc light signal to the arc light protection device, the arc light extension unit or the current protection unit through the connector 8.

Further, as shown in Figure 4, the transparent optical fiber sensor also includes a connector 8, a sensor joint and a directional arc light sensor 9, one end of the transparent optical fiber 7 is connected to the connector 8, and the other end of the transparent optical fiber 7 passes through The sensor connector is connected with the directional arc sensor 9 . In this connection direction, the transparent optical fiber sensor not only collects the arc signal through the transparent optical fiber 7, but also collects the arc signal of the monitored equipment through the directional arc sensor 9, and collects the transparent optical fiber 7 and the directional arc sensor 9 through the connector 8. The arc signal is transmitted to the arc protection device, arc extension unit or current protection unit.

Further, the portable connecting piece is a pendant, an adhesive piece, an absorbing piece, a fastener or a clamping piece, and is installed on the body of the worker by means of mounting, sticking, absorbing, fastening or clamping.

Further, as shown in FIG. 5 , the arc light portable sensor further includes a follower circuit, a conditioning circuit, an anti-interference circuit, a voltage-controlled current source, a polarity adaptive circuit and a protection circuit sequentially connected to the arc light sensor probe.

Further, it also includes a memory connected to the NFC module.

The arc protection device is the core of a 360-degree all-round ring network arc protection system. It is responsible for information collection, logic analysis, fault judgment and trip control of the system. It also manages all expansion units and can also perform centralized monitoring of feeder units.

The feeder protection unit can collect 4 channels of arc light and 4 channels of TA current collection channels, that is, it can realize the arc light and current protection of two adjacent feeders at most, and quickly cut off the fault.

Arc extension unit: 16 arc acquisition channels can be expanded.

Current protection unit: 6 TA current acquisition channels and tripping channels can be expanded.

Arc sensor: responsible for detecting arc light information and converting arc light intensity into digital signal.

The arc protection device in the present invention is respectively connected to the current protection unit and one or more arc extension units through a switch, and the arc extension unit is connected to a plurality of arc sensors.

Further, the tripping output ports of the arc protection device are respectively connected to the circuit breakers at the high-voltage end and low-voltage end of the first transformer and the bus-tie circuit breaker, and the current detection end of the arc protection device is connected to the first transformer through a current line. The first current sensor on the low-voltage side of the arc protection device is also connected to a plurality of arc sensors.

Further, the tripping output port of the current protection unit is respectively connected to the circuit breaker at the high-voltage end and the low-voltage end of the second transformer, and the current detection end of the arc protection device is connected to the second Current sensor connection.

Further, the first low-voltage bus is connected to the second low-voltage bus through a tie circuit breaker, and the arc protection device is also connected to a feeder protection unit and a working condition monitoring unit.

Further, as shown in Figure 6, the arc protection device includes a casing 11 and an internal circuit board, and the main panel of the casing 11 is provided with a liquid crystal display 12, various LED indicator lights 13, and function buttons 14 and wizard button 15, the rear panel of the casing 11 is provided with an AC input interface, an arc sensor input interface, a trip output port, a clock synchronization interface, a communication interface, a monitoring interface, an expansion interface and an environmental data input interface;

Further, the LED indicator light 13 includes a power indicator light, a running indicator light, a synchronization indicator light, an abnormal device indicator light, an environment monitoring indicator light, a current limit indicator light, an arc light limit light indicator, a trip indicator light and a maintenance indicator lamp.

Among them, the power indicator light, the running indicator light and the synchronization indicator light can all be green lights. The power indicator light is on when there is power, and the running indicator light flashes at 2Hz when there is a program running. When the time is synchronized, the synchronization indicator light is on.

Device abnormal indicator light, current limit indicator light, arc light limit indicator light and trip indicator light can be red lights. When the device is abnormal, the device abnormal indicator light is on. When the limit is exceeded, the arc light limit indicator light is on, and the trip indicator light is on when the device trips.

The environmental monitoring indicator light and the maintenance indicator light can adopt yellow lights, and the environmental monitoring indicator light is on when the environment monitoring alarm is issued, and the maintenance indicator light is on when the device is set to maintenance.

Further, the function keys 14 include a return key F1, a previous function page key F2, a next function page key F3, a return main interface key F4 and a reset key.

Further, the guide buttons 15 include an up button, a down button, a left button, a right button and an OK button.

The function buttons 14 and/or guide buttons 15 are touch buttons, and the liquid crystal display 12 is a touch display. Further, the touch button and the touch display screen are integrated.

Further, the working condition monitoring unit includes a temperature and humidity sensor, a wireless temperature sensor, a combustible gas sensor, a wireless humidity sensor, a leakage current detection unit and a leakage current sensor.

Both sides of the front panel are also provided with a mounting plate 16, and the mounting plate 16 is provided with a plurality of mounting and fixing holes.

The arc protection device in the present invention is capable of collecting current and arc sensor signals, tripping and outputting signals, and provides a variety of indicator lights, so that operators can understand the state of the arc protection device more intuitively. The invention also provides a touch display screen and a touch button, which supports large-screen display, reduces the volume of the device, and reduces the occupied space of the device. The invention also has abundant external interfaces, supports more functions, and can simultaneously complete the monitoring of visible light and infrared light.

The present invention proposes a 360-degree omni-directional ring network arc protection system for arc protection on double buses. In order to reduce the fault area, the first low-voltage bus and the second low-voltage bus are limited by bus tie circuit breakers. The arc protection device and the current protection unit are used as the trip unit. The arc light protection device trips the circuit breaker of the first transformer when the first low-voltage bus fails, and performs circuit failure protection when the first low-voltage bus and the second low-voltage bus fail. If the current setting value is exceeded and a fault occurs in its zone, the arc light protection device trips the bus tie circuit breakers of the first low-voltage bus and the second low-voltage bus. The current protection unit trips the circuit breaker of the second transformer, and at the same time serves as the circuit breaker protection for the second low-voltage bus.

When the inspection personnel perform inspection tasks, they can directly install the present invention on the body by means of mounting, sticking, absorbing, fastening or clamping to perform directional arc detection. At the same time, the inspection personnel can place the arc sensor The upper NFC module communicates with the NFC tag on the inspection personnel or the NFC inspection handheld terminal, transmits or modifies the data in the memory, and transmits the inspection data to the NFC inspection system.

The arc alarm is obtained from the alarm relay of the arc protection device, which is activated when a fault occurs in the area, and the system self-test alarm is obtained from the alarm relay of the arc protection device.

The principle of arc light protection: According to the two factors of arc light and current increment, when the arc light and current increment are detected at the same time, a trip command is issued. When the system fails, the arc sensor converts the arc signal into an electrical signal, and transmits it to the arc protection device through the I/O auxiliary unit. The arc protection device then detects the current signal and reaches the starting value, that is, sends out a trip signal.

The invention adopts a distributed mode design, is suitable for medium and low voltage double bus protection, and has flexible networking characteristics. Among them, the feeder protection unit can independently form a minimum protection system, and protect the feeder alone to reduce the scope of accidental power outages. The feeder unit can also operate in a centralized monitoring mode, dispatching communication through the arc protection device. The arc light protection of the present invention adopts the detection of arc light and current as input, and can be used as overcurrent protection, pure arc light protection, and double criterion protection of arc light and overcurrent. This system has the advantages of simple principle, reliable and rapid action, no special requirements for primary equipment, and adaptable to various operating modes.

An arc light protection method with 360-degree omnidirectional monitoring and NFC monitoring functions according to the present invention has been described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that for the arc light protection method with 360-degree omnidirectional monitoring and NFC monitoring functions proposed in the present invention, various improvements can be made without departing from the content of the present invention. . Therefore, the protection scope of the present invention should be determined by the contents of the appended claims.

Claims (1)

1. An arc light protection method with 360-degree omnidirectional monitoring and NFC monitoring function, is characterized in that, comprises the following steps: S1, inspectors wear portable arc light sensors, communicate with the NFC module installed in the arc light portable sensors or arc light protection devices through NFC handheld inspection terminals, and send the collected inspection data to the NFC inspection system; S2, the arc light portable sensor communicates with the arc light protection device in real time through a wireless transceiver and switch, and follows the inspection personnel to complete the arc light directional monitoring; S3, the arc light protection device performs real-time arc light detection on the first transformer end through the arc light sensor to detect whether there is arc light, and monitors the current signal of the first transformer in real time through the first current sensor to detect the current increment; if arc light or current abnormality is detected , and through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the arc light protection device disconnects the high-voltage side circuit breaker or low-voltage side circuit breaker of the first transformer; S4, the current protection unit performs real-time arc detection on the second transformer end through the arc sensor to detect whether there is an arc, monitors the current signal of the second transformer in real time through the second current sensor, and detects the current increment; if the arc is detected or the current is abnormal, And through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the current protection unit disconnects the high-voltage side circuit breaker or low-voltage side circuit breaker of the second transformer; S5, the arc protection device and the current protection unit communicate with each other through the switch; S6, the arc protection device also communicates with multiple arc extension units through the switch, and the arc extension units respectively detect the arc of the monitored equipment under the first low-voltage bus and the monitored equipment under the second low-voltage bus through the arc sensor; S601. If an arc alarm is detected on the monitored equipment under the first low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the first low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and second low-voltage busbar; S602. If an arc alarm is detected on the monitored equipment under the second low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the second low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and second low-voltage busbar; The arc light sensor includes a transparent optical fiber sensor, the transparent optical fiber sensor includes a transparent optical fiber (7), completes 360-degree omni-directional arc light monitoring through the transparent optical fiber (7), and forms a ring monitoring network through the transparent optical fiber (7); The arc light portable sensor includes an arc light sensor probe, an NFC module and a portable connector, the NFC module is arranged in the arc light sensor probe, and the arc light sensor probe is installed on the portable connector; The portable connecting piece is a pendant, an adhesive piece, an absorbing piece, a fastener or a clamping piece, which is installed on the inspector's body by means of mounting, sticking, absorbing, fastening or clamping; On the overalls used by inspectors to wear the portable arc sensor, there is an NFC tag that stores the information of the inspector, and the NFC tag is set at the wearing place of the arc portable sensor; The arc protection device also uses the feeder protection unit for centralized feeding protection, and the arc protection device also monitors the environmental conditions of the monitored equipment in real time through the working condition monitoring unit; The working condition monitoring unit includes a temperature and humidity sensor, a wireless temperature sensor, a combustible gas sensor, a wireless humidity sensor, a leakage current detection unit and a leakage current sensor; In the arc light portable sensor, the arc light signal collected by the arc light sensor probe is also sequentially processed through a follower circuit, a conditioning circuit, an anti-interference circuit, a voltage-controlled current source, a polarity adaptive circuit and a protection circuit; The NFC handheld inspection terminal includes an NFC smart phone; The transparent optical fiber (7) sequentially includes a glass optical fiber (1), a filling layer (2), a filter layer (3), a metal layer (4) and a protective layer (5) from inside to outside; The transparent optical fiber sensor also includes a connector (8), a sensor joint and a directional arc sensor (9), one end of the transparent optical fiber (7) is connected to the connector (8), and the other end of the transparent optical fiber (7) Connect to the directional arc sensor (9) via the sensor connector.