CN117318300B - All-digital information interaction ring main unit with optimized structure - Google Patents
All-digital information interaction ring main unit with optimized structure Download PDFInfo
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- CN117318300B CN117318300B CN202311274413.4A CN202311274413A CN117318300B CN 117318300 B CN117318300 B CN 117318300B CN 202311274413 A CN202311274413 A CN 202311274413A CN 117318300 B CN117318300 B CN 117318300B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
- H02J13/00026—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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Abstract
The invention discloses an all-digital information interaction ring main unit with optimized structure, which comprises a ring main unit body, wherein a mechanism chamber, a ring main secondary chamber, a communication chamber and a cable chamber are separated in the ring main unit body, the ring main secondary chamber is provided with a distributed power distribution terminal interval unit, and the communication chamber is provided with a distributed power distribution terminal public unit, a power battery and a power management unit; the ring network secondary chamber is also provided with an intelligent control monitoring unit, the cable chamber is provided with a depth fusion sleeve and a cable head temperature measuring system, the top of the ring network box body is independently provided with a bus PT compartment, and a bus PT is arranged in the bus PT compartment; the intelligent control monitoring unit comprises a digital intelligent sensing module and an interval display module which are arranged independently; the depth fusion sleeve includes an insulating sleeve and an ECT/EVT structure that are assembled as one piece. The intelligent monitoring system is reasonable in structural design, convenient to install, high in accuracy and reliability of intelligent monitoring in the operation process of the ring main unit, high in practicability, capable of improving emergency handling capacity and guaranteeing power grid safety.
Description
Technical Field
The invention belongs to the technical field of power transmission and distribution equipment, and particularly relates to an all-digital information interaction ring main unit with an optimized structure.
Background
At present, the ring network box construction standard adopts a standardized custom-made ring network box of a national network company several years ago, the occupied area is large, and the requirements of a novel city distribution network on the miniaturization and the intellectualization of the ring network box are difficult to meet. The defects of the method are as follows:
(1) With the development of urban economy, the urban street has larger electricity load, but because urban space is limited, land resources are tense and coordination is difficult, and sufficient installation space is difficult to provide for the installation of a large-size ring main unit; moreover, the transformation of the stock cable branch box is that the national standard ring net cabinet/ring net box cannot be installed due to the narrow field installation space;
(2) The existing ring main unit is blank in terms of motor, coil, switch mechanical characteristics, line fault analysis and the like, so that operation and maintenance in the debugging process and later period become difficult, and the analysis of problems has to be carried out by an original manufacturer;
(3) The current transformer, the zero sequence transformer and the like adopted by the existing ring main unit are still traditional electromagnetic transformers, and although the function of open circuit prevention is prefabricated, the transformers and the ring main unit still need to be connected, so that the transformers still have open circuit risks, and meanwhile, the wires of the transformers are easy to break when the transformers are penetrated due to the fact that the transformers need to be penetrated when cables are installed, so that construction inconvenience is caused;
(4) The existing ring main unit has the problem that the device for monitoring the temperature of the cable head is difficult to take electricity when the cable current is low, and can not instantaneously reflect the temperature change at the cable joint; and the requirements on the number and quality of maintenance personnel are high, the influence of human factors is great, and the monitoring reliability is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the all-digital information interaction ring main unit with the optimized structure, which has the advantages of reasonable structural design, reduced volume of the ring main unit, convenient installation, adoption of the deep fusion sleeve, high accuracy and reliability of intelligent monitoring in the operation process of the ring main unit, strong practicability, capability of improving emergency disposal capability and guarantee of power grid safety.
In order to solve the technical problems, the invention adopts the following technical scheme: the all-digital information interaction ring network box with the optimized structure comprises a ring network box body, wherein a mechanism chamber, a ring network secondary chamber, a communication chamber and a cable chamber are separated in the ring network box body through insulating partition boards, the ring network secondary chamber is provided with a distributed distribution terminal spacing unit, and the communication chamber is provided with a distributed distribution terminal public unit, a power battery and a power management unit; the intelligent control monitoring unit is further installed in the ring network secondary chamber, the depth fusion sleeve and the cable head temperature measuring system are installed in the cable chamber, a bus PT compartment is independently arranged at the top of the ring network box body, and a bus PT is installed in the bus PT compartment;
The intelligent control monitoring unit comprises a digital intelligent sensing module and an interval display module which are arranged independently, wherein the digital intelligent sensing module is used for monitoring and analyzing motor disconnection and motor stalling, for analyzing mechanical characteristics of a switch, for judging line faults and for realizing unlocking authentication and authorization of a ring main box body; the interval display module is used for displaying all real-time data, position states, states of monitoring equipment and events;
The depth fusion sleeve includes an insulating sleeve and an ECT/EVT structure assembled as one piece.
The all-digital information interaction ring main unit with the optimized structure is characterized in that a passive lock cylinder matched with a wireless key for use is installed on a cabinet door of the ring main unit body, an intelligent unlocking circuit module and a battery for supplying power to the passive lock cylinder and the intelligent unlocking circuit module are arranged inside the wireless key, and the intelligent unlocking circuit module is in wireless connection and communication with the digital intelligent sensing module.
The digital intelligent sensing module comprises an energy storage motor monitoring circuit module for monitoring and analyzing motor disconnection and motor stalling, a switch mechanical characteristic analysis circuit module for analyzing switch mechanical characteristics, a line fault monitoring circuit module for monitoring line faults, and an unlocking authentication and authorization circuit module for realizing unlocking authentication and authorization of the ring main body.
The energy storage motor monitoring circuit module comprises a first microprocessor module, a first AD sampling circuit and a first RS485 communication module, wherein the first AD sampling circuit and the first RS485 communication module are connected with the first microprocessor module, the input end of the first AD sampling circuit is connected with an energy storage motor current detection circuit, and the first RS485 communication module is connected with the interval display module;
The switch mechanical characteristic analysis circuit module comprises a second microprocessor module, a breaking pulse signal transmission circuit, a second AD sampling circuit and a second RS485 communication module, wherein the breaking pulse signal transmission circuit, the second AD sampling circuit and the second RS485 communication module are connected with the second microprocessor module, and the input end of the second AD sampling circuit is connected with a voltage waveform monitoring circuit and a current waveform monitoring circuit;
The circuit fault monitoring circuit module comprises a third microprocessor module, a third AD sampling circuit and a third RS485 communication module, wherein the third AD sampling circuit and the third RS485 communication module are connected with the third microprocessor module, the input end of the third AD sampling circuit is connected with the output ends of the ECT circuit and the EVT circuit in the ECT/EVT structure, and the third RS485 communication module is connected with the interval display module;
the unlocking authentication and authorization circuit module comprises a fourth microprocessor module, a first wireless communication module and a fourth RS485 communication module which are connected with the fourth microprocessor module, and the fourth RS485 communication module is connected with the interval display module.
The above-mentioned all-digital information interaction looped netowrk case with optimized structure, the interval display module includes a fifth microprocessor module, and a display screen and a fifth RS485 communication module connected with the fifth microprocessor module.
The utility model provides a full digital information interaction looped netowrk case of structural optimization, ECT/EVT structure is detachable ECT/EVT structure, insulating boot includes sleeve pipe first half and sleeve pipe second half, be provided with sealed blotter between sleeve pipe first half and the sleeve pipe second half, sleeve pipe first half is including stretching into the first half sleeve pipe in the looped netowrk case box and connecting in first half sleeve pipe intermediate position department and the conducting rod that stretches out backward, sleeve pipe second half includes the second half sleeve pipe that is connected and is used for connecting the cable head with detachable ECT/EVT structure, the conducting rod passes sleeve pipe second half through the through-hole that sets up on detachable ECT/EVT structure and second half sleeve pipe.
The detachable ECT/EVT structure comprises an ECT circuit and an EVT circuit which are arranged side by side, wherein the ECT circuit comprises a low-power coil and a voltage dividing resistor connected with the low-power coil, the low-power coil is sleeved on a conducting rod and coincides with the axis of the through hole, a left empty hall is reserved below the low-power coil, and the voltage dividing resistor is arranged in Zuo Kongtang;
The EVT circuit comprises an EVT phase voltage detection circuit and an EVT zero sequence voltage detection circuit, wherein the EVT phase voltage detection circuit comprises a first high-voltage capacitor and a first low-voltage capacitor which are connected in series, and the EVT zero sequence voltage detection circuit comprises a second high-voltage capacitor and a second low-voltage capacitor which are connected in series; the conducting rod is provided with a metallic connection point at a position parallel to the low-power coil, a right empty room is reserved below the metallic connection point, and the first high-voltage capacitor and the first low-voltage capacitor, the second high-voltage capacitor and the second low-voltage capacitor are arranged in the right empty room.
The cable head temperature measurement system comprises a cable head upper joint sensor, a cable head lower joint sensor, a temperature measurement monitoring device and a wireless transmitting module, wherein the cable head upper joint sensor is connected to an upper cable and used for detecting voltage on the upper cable, the cable head lower joint sensor is connected to a lower cable and used for detecting voltage on the lower cable, and the cable head upper joint sensor, the cable head lower joint sensor and the wireless transmitting module are all connected with the temperature measurement monitoring device.
The temperature measurement monitoring device comprises a sixth microprocessor module, an induction power-taking module, a battery energy storage module and a communication module connected with the sixth microprocessor module, wherein the communication module is connected with the wireless transmitting module; the battery energy storage module is linked with the induction power taking module, stores induction power taking electric energy and supplies power for the temperature measurement monitoring device in a state that small current cannot be used for induction power taking; the input end of the sixth microprocessor module is connected with a temperature sensor for detecting the temperature of the cable head in real time, and the output end of the sixth microprocessor module is connected with an operation indicator lamp and a communication state indicator lamp.
The above-mentioned all-digital information interaction looped netowrk case of structure optimization, wireless transmission module is the wireless transmission module of loRa, WIFI wireless transmission module, bluetooth wireless transmission module or RS485 wireless transmission module.
Compared with the prior art, the invention has the following advantages:
1. According to the full-digital information interaction ring main unit with the optimized structure, a large-volume device is reduced through the design of the structural layout, and the highly integrated intelligent control monitoring unit and the distributed distribution terminal interval unit are installed, so that the volume of the ring main unit is reduced, the purpose of reducing the occupied area of the ring main unit is achieved, meanwhile, related sensing data such as current, voltage and temperature rise are sensed through various sensors, the intelligent control monitoring unit is responsible for monitoring and analyzing the sensing data, maintenance and overhaul are easy, and a user layer can acquire an evaluation report or perform related triple teleoperation through terminal layer equipment.
2. The full-digital information interaction ring main unit with the optimized structure, provided by the invention, has the advantages that the intelligent control monitoring unit can realize multi-functional multi-azimuth monitoring by collecting a plurality of current and voltage signals, and the problems of bulkiness of cabinet panels, complex line, no follow-up on site construction and the like caused by the installation of traditional multi-equipment and multi-sensor are avoided; according to the invention, the problems are solved, and meanwhile, the display of all functions is completed by adopting one interval display module, meanwhile, the related functions of the digital intelligent perception module are not affected when the interval display module is damaged, so that the safety and stability of the equipment are improved; rather than a simple, indicative fault, it is possible to directly indicate what fault has occurred, such as motor disconnection, motor stalling, line faults, etc.
3. The mechanical characteristic of the circuit breaker is monitored, the opening pulse is combined with the voltage signal and the current signal in the electric quantity to judge the start and the end of the opening action, when no current exists, the mechanical characteristic is determined by using the voltage waveform reference, and when the voltage waveform and the current waveform are used as references, the mechanical characteristic is determined by using the current waveform reference, and compared with the simple method in the prior art, the accuracy and the reliability are higher; compared with the complex method in the prior art, the method is simple, the detection real-time performance is high, and the accuracy and the reliability are also high.
4. The fully digital information interaction ring main unit with optimized structure, provided by the invention, has the advantages that the deep fusion sleeve comprises the insulating sleeve and the ECT/EVT structure which are assembled into a whole, the volume is small, the weight is light, the current measurement range is large, no iron core is saturated, the safety is high, and the installation and the disassembly are convenient; the cable is manufactured by adopting a pressure gel casting process, so that the cable has enough electrical strength and mechanical strength, can meet all technical indexes of insulation performance, and can bear the acting force of installing the cable; the sensor adopts an anti-interference technology, and when the relative positions of the surrounding charged body, the grounding body such as a steel plate and the like are changed, the error index can be controlled within the range specified by the related standard; the sensor assembly adopts a replaceable design, so that the off-line detection and the disassembly and assembly are convenient when the sensor assembly needs to be replaced; in the prior art, transformers such as various phase currents, zero sequence currents and voltages are arranged in the cabinet, and the deep fusion sleeve structure can replace a plurality of original devices through fusion in functions, and has maintainability.
5. The all-digital information interaction ring main unit with optimized structure utilizes the voltage difference on-line monitoring technology, captures the abnormality of the cable head in operation by monitoring and analyzing the voltage difference values of the upper connector and the lower connector of the cable head, can timely find out the early sign of the cable head heating accident, reminds the cable head operation and maintenance manager to take effective measures, and prevents serious accidents; the requirements on the number and quality of maintenance personnel can be reduced, the influence of human factors is reduced, and the reliability of the equipment is improved; the maintenance mode can be changed from the traditional accident maintenance and the periodical maintenance to the forecast maintenance.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic block diagram of a monitoring circuit module of the energy storage motor of the present invention;
FIG. 4 is a schematic block diagram of a switch mechanical characteristic analysis circuit module according to the present invention;
FIG. 5 is a schematic block diagram of a circuit module of the line fault monitoring circuit of the present invention;
FIG. 6 is a schematic block diagram of an unlocking authentication and authorization circuit module of the present invention;
FIG. 7 is a schematic block diagram of a circuit of the spacer display module of the present invention;
FIG. 8 is a schematic view of the construction of a depth fusion cannula according to the present invention;
FIG. 9 is a schematic diagram of the current signal output by the depth fusion cannula of the present invention;
FIG. 10 is a schematic diagram of the voltage signal output by the depth fusion cannula of the present invention;
FIG. 11 is a schematic diagram of a cable head temperature measurement system of the present invention;
FIG. 12 is a schematic block diagram of a temperature monitoring device according to the present invention.
Reference numerals illustrate:
1-a ring main unit body; 1-a ring main secondary chamber; 1-2-communication room; 1-3-cable chamber; 1-4-busbar PT compartment; 2-an intelligent control monitoring unit; 2-1-a first microprocessor module; 2-a first AD sampling circuit; 2-3—a first RS485 communication module; 2-4, an energy storage motor current detection circuit; 2-5-a second microprocessor module; 2-6-a second AD sampling circuit; 2-7-a second RS485 communication module; 2-8-breaking pulse signal transmission circuit; 2-9, a voltage waveform monitoring circuit; 2-10-a current waveform monitoring circuit; 2-11-a third microprocessor module; 2-12-a third AD sampling circuit; 2-13-a third RS485 communication module; 2-14-a fourth microprocessor module; 2-15—a first wireless communication module; 2-16 to fourth RS485 communication module; 2-17-a fifth microprocessor module; 2-18, a display screen; 2-19-a fifth RS485 communication module; 3-a distributed power distribution terminal spacing unit; 4-a distributed power distribution terminal public unit; 5-a power battery; 6-a power management unit; 7-deep fusion cannula; 7-1, a front half sleeve; 7-2-conducting rod; 7-3-removable ECT/EVT configuration; 7-31-ECT circuit; 7-311—a low power coil; 7-312—voltage dividing resistor; 7-32-EVT circuit; 7-321, a first high-voltage capacitor; 7-322-a first low voltage capacitor; 7-323-a second high voltage capacitor; 7-324-a second low voltage capacitor; 7-4, a front half sleeve; 7-5-sealing the cushion pad; 8-a cable head temperature measurement system; 8-1-a cable head upper joint sensor; 8-2-a cable head lower joint sensor; 8-3-cable head; 8-4, a temperature measurement monitoring device; 8-41-a sixth microprocessor module; 8-42, an induction power taking module; 8-43-a battery energy storage module; 8-44-a communication module; 8-45, a temperature sensor; 8-46, an operation indicator lamp; 8-47-communication status indicator lamp; 8-5-front half sleeve; 9-passive lock cylinder.
Detailed Description
As shown in fig. 1 and 2, the all-digital information interaction ring network box with optimized structure comprises a ring network box body 1, wherein a mechanism chamber 1-5, a ring network secondary chamber 1-1, a communication chamber 1-2 and a cable chamber 1-3 are separated in the ring network box body 1 through insulating partition boards, the ring network secondary chamber 1-1 is provided with a distributed power distribution terminal spacing unit 3 (DTU spacing unit), and the communication chamber 1-2 is provided with a distributed power distribution terminal public unit 4 (DTU public unit), a power battery 5 and a power management unit 6; the method is characterized in that: the intelligent control monitoring unit 2 is further installed in the ring network secondary chamber 1-1, the depth fusion sleeve 7 and the cable head temperature measuring system 8 are installed in the cable chamber 1-3, the bus PT compartment 1-4 is independently arranged at the top of the ring network box body 1, and the bus PT10 is installed in the bus PT compartment 1-4;
the intelligent control monitoring unit 2 comprises a digital intelligent sensing module and an interval display module which are arranged independently, wherein the digital intelligent sensing module is used for monitoring and analyzing motor disconnection and motor stalling, for analyzing mechanical characteristics of a switch, for judging line faults and for realizing unlocking authentication and authorization of the ring main unit 1; the interval display module is used for displaying all real-time data, position states, states of monitoring equipment and events;
The depth fusion sleeve 7 comprises an insulating sleeve and an ECT/EVT structure which are assembled into a whole.
In this embodiment, install on the cabinet door of looped netowrk box 1 with the supporting passive lock core 9 that uses of wireless key, wireless key is inside to be provided with intelligent unlocking circuit module and for the battery of passive lock core 9 and intelligent unlocking circuit module power supply, intelligent unlocking circuit module and digital intelligent perception module wireless connection and communication.
In specific implementation, the intelligent unlocking circuit module comprises a seventh microprocessor module, a lock cylinder communication module which is connected with the seventh microprocessor module and is used for communicating with the passive lock cylinder 9, and a wireless communication module which is connected with the seventh microprocessor module and is used for wirelessly connecting and communicating with the digital intelligent sensing module. The battery is a button battery or a rechargeable battery. The wireless communication module is a LoRa remote transmission module, a WIFI module or a Bluetooth module.
In this embodiment, the digital intelligent sensing module includes an energy storage motor monitoring circuit module for implementing monitoring and analysis of motor disconnection and motor stalling, a switch mechanical characteristic analysis circuit module for implementing switch mechanical characteristic analysis, a line fault monitoring circuit module for implementing line fault monitoring, and an unlocking authentication and authorization circuit module for implementing unlocking authentication and authorization of the ring main unit 1.
In this embodiment, as shown in fig. 3, the energy storage motor monitoring circuit module includes a first microprocessor module 2-1, a first AD sampling circuit 2-2 and a first RS485 communication module 2-3 connected to the first microprocessor module 2-1, an input end of the first AD sampling circuit 2-2 is connected to an energy storage motor current detection circuit 2-4, and the first RS485 communication module 2-3 is connected to an interval display module;
when the first microprocessor module 2-1 monitors no current in the motor loop (when the current is 0A), judging that the motor is disconnected; when the first microprocessor module 2-1 monitors that the motor current is larger than the preset maximum current, the motor is judged to be locked.
When the motor is started (after the motor is avoided from starting current), the motor current is between 2A and 4A under normal conditions, and when the motor current is more than 4A, the motor is judged to be blocked for stopping, so that the preset maximum current can be set to be 4A, the power of different cabinet type motors is inconsistent, and the current can be set.
As shown in fig. 4, the switch mechanical characteristic analysis circuit module comprises a second microprocessor module 2-5, and a breaking pulse signal transmission circuit 2-8, a second AD sampling circuit 2-6 and a second RS485 communication module 2-7 which are connected with the second microprocessor module 2-5, wherein the input end of the second AD sampling circuit 2-6 is connected with a voltage waveform monitoring circuit 2-9 and a current waveform monitoring circuit 2-10;
In the specific implementation, the circuit breaker sends out a breaking pulse signal when in fault, the signal is transmitted to the second microprocessor module 2-5 through the breaking pulse signal transmission circuit 2-8, and the second microprocessor module 2-5 takes the time of receiving the signal as the time of starting the mechanical characteristic timing, and marks as t0; the current waveform monitoring circuit 2-10 monitors the current in real time, the second microprocessor module 2-5 starts to process the current waveform after receiving the breaking pulse signal, and determines a specific time point of current mutation according to the current actual waveform, and records the specific time point as time t1 for completing breaking of the circuit breaker by taking the current waveform as a reference; meanwhile, the voltage waveform monitoring circuit 2-9 monitors the voltage in real time, the second microprocessor module 2-5 starts to process the voltage waveform after receiving the breaking pulse signal, and determines a specific time point of voltage mutation according to the actual waveform of the voltage, and records the specific time point as time t2 for completing breaking of the circuit breaker by taking the voltage waveform as a reference;
When the second microprocessor module 2-5 does not receive the current output by the current waveform monitoring circuit 2-10 and only receives the voltage output by the voltage waveform monitoring circuit 2-9, the second microprocessor module 2-5 calculates the time difference TV between t0 and t2, takes the time difference TV as breaking mechanical characteristics, stores and forwards the breaking mechanical characteristics to the aspect of operation and maintenance; when the second microprocessor module 2-5 receives the current output by the current waveform monitoring circuit 2-10 and the voltage output by the voltage waveform monitoring circuit 2-9, the second microprocessor module 2-5 calculates the time difference TI between t0 and t1, takes the time difference TI as the breaking mechanical characteristic, stores and transmits the breaking mechanical characteristic to the aspect of operation and maintenance;
the invention combines the opening pulse with the voltage signal and the current signal in the electric quantity to judge the start and the end of the opening action, when no current exists, the mechanical characteristic is determined by the voltage waveform reference, and when the voltage waveform and the current waveform are used as references, the mechanical characteristic is determined by the current waveform reference, and compared with the simple method in the prior art, the accuracy and the reliability are higher; compared with the complex method in the prior art, the method is simple, the detection real-time performance is high, and the accuracy and the reliability are also high.
As shown in fig. 5, the line fault monitoring circuit module includes a third microprocessor module 2-11, a third AD sampling circuit 2-12 and a third RS485 communication module 2-13, which are connected with the third microprocessor module 2-11, wherein an input end of the third AD sampling circuit 2-12 is connected with an output end of an ECT circuit 7-31 and an EVT circuit 7-32 in the ECT/EVT structure, and the third RS485 communication module 2-13 is connected with an interval display module;
When the implementation is carried out, when the line faults are judged, and when the zero sequence voltage and the zero sequence current are both larger than the set values, the ground faults are judged; when the phase current is larger than a set value, and the phase voltage is smaller than a low-voltage set value or the negative sequence voltage is larger than the set value, judging that the phase is in fault; recording waves and recording events after judging faults, and simultaneously lighting a line fault indicator lamp to indicate fault types;
As shown in fig. 6, the unlocking authentication and authorization circuit module comprises a fourth microprocessor module 2-14, a first wireless communication module 2-15 and a fourth RS485 communication module 2-16 which are connected with the fourth microprocessor module 2-14, and the fourth RS485 communication module 2-16 is connected with the interval display module.
In the specific implementation, the first wireless communication modules 2-15 are LoRa remote transmission modules, WIFI modules or bluetooth modules, and are in wireless connection and communication with the wireless communication modules in the intelligent unlocking circuit module.
When a worker inserts the passive lock cylinder 9 by using the wireless key, the passive lock cylinder 9 obtains power supply of the wireless key and communicates with the wireless key through the lock cylinder communication module, and the wireless key, the passive lock cylinder and the unlocking authentication and authorization circuit module perform unlocking authentication through a preset encryption authentication algorithm; when the unlocking authentication fails, adding the wireless key into a blacklist; when the unlocking authentication is passed, the passive lock cylinder 9 sends an encrypted random number to the wireless key, the wireless key is communicated with the unlocking authentication and authorization circuit module through the wireless communication module, key data is sent to the unlocking authentication and authorization circuit module, the unlocking authentication and authorization circuit module inquires authorization information, and when the unlocking is legal, an unlocking password is issued to normally unlock; the wireless key waits for receiving unlocking result information, and uploads the unlocking result information to the unlocking authentication and authorization circuit module after receiving the unlocking result information.
The lock cylinder adopted by the invention is a passive lock cylinder, and after the passive lock cylinder is arranged on the ring main unit, power supply is not needed, and maintenance is not needed basically; the unlocking authentication and authorization circuit module records the ID and the corresponding information of the actual position of each passive lock core, distributes a key for workers, can unlock and open all ring main units through configuration, and can effectively save manpower and material resources.
In this embodiment, as shown in fig. 7, the interval display module includes a fifth microprocessor module 2-17, and a display screen 2-18 and a fifth RS485 communication module 2-19 connected to the fifth microprocessor module 2-17.
In this embodiment, as shown in fig. 8, the ECT/EVT structure is a detachable ECT/EVT structure 7-3, the insulating sleeve includes a sleeve front half portion and a sleeve rear half portion, a sealing cushion pad 7-5 is disposed between the sleeve front half portion and the sleeve rear half portion, the sleeve front half portion includes a front half sleeve 7-1 extending into the ring main box 1 and a conductive rod 7-2 connected at a middle position of the front half sleeve 7-1 and extending backward, the sleeve rear half portion includes a rear half sleeve 7-4 connected with the detachable ECT/EVT structure 7-3 and used for connecting a cable head, and the conductive rod 7-2 passes through the sleeve rear half portion through a through hole disposed on the detachable ECT/EVT structure 7-3 and the rear half sleeve 7-4.
In this embodiment, as shown in fig. 8, the detachable ECT/EVT structure 7-3 includes an ECT circuit 7-31 and an EVT circuit 7-32 that are disposed side by side, the ECT circuit 7-31 includes a low-power coil 7-311 and a voltage dividing resistor 7-312 connected to the low-power coil 7-311, the low-power coil 7-311 is sleeved on the conductive rod 7-2 and coincides with the axis of the through hole, a left hollow space is left below the low-power coil 7-311, and the voltage dividing resistor 7-312 is disposed in the Zuo Kongtang;
The EVT circuit 7-32 comprises an EVT phase voltage detection circuit and an EVT zero sequence voltage detection circuit, wherein the EVT phase voltage detection circuit comprises a first high-voltage capacitor 7-321 and a first low-voltage capacitor 7-322 which are connected in series, and the EVT zero sequence voltage detection circuit comprises a second high-voltage capacitor 7-323 and a second low-voltage capacitor 7-324 which are connected in series; the conducting rod 7-2 is provided with a metallic connecting point at a position parallel to the low-power coil 7-311, a right empty hall is reserved below the metallic connecting point, and the first high-voltage capacitor 7-321 and the first low-voltage capacitor 7-322, and the second high-voltage capacitor 7-323 and the second high-voltage capacitor 7-324 are arranged in the right empty hall.
The depth fusion sleeve 7 of the invention has 3 signals in total, the high-voltage signal is consistent with the original signal, the original function is reserved, and the ECT phase current signal, the ECT zero-sequence current signal, the EVT phase voltage signal and the EVT zero-sequence voltage signal are added on the original basis.
In practice, the power of the low power coils 7-311 does not exceed 15W. The capacitance value of the first high-voltage capacitor 7-321 is fixed, and the requirement of the transformation ratio is met by adjusting the capacitance value of the first low-voltage capacitor 7-322; the capacitance of the first low-voltage capacitor 7-322 defines a capacitance in the semifinished product, the transformation ratio at which there is a certain difference from the transformation ratio of the standard cone. Thus reserving a margin for adjustment. The first low-voltage capacitor 7 to 322 may have a fixed capacitance value, and it is necessary to prepare capacitors having various capacitance values in consideration of errors in capacitance values.
The depth fusion sleeve 7 is arranged to be a combination of a front part and a rear part, so that off-line detection or ECT/EVT replacement is facilitated;
In practice, the through holes are suitably matched with the conductive rods 2, allowing a tolerance of +0.5mm. The front half sleeve 7-1 and the rear half sleeve 7-4 are manufactured by adopting a pressure gel casting process; the installation size of the front half sleeve 7-1 and the rear half sleeve 7-4 is consistent with that of the sleeve when the original sleeve is not fused, and the prefabricated cable heads matched with the front half sleeve and the rear half sleeve do not need to be replaced, but the length of the prefabricated cable heads is slightly increased compared with that of the original sleeve; the sealing cushion 7-5 is a silicone rubber pad. On the one hand for sealing against creepage and on the other hand as a hard-wired buffer. The conducting rod 7-2 is a copper rod, and the size and threads of the copper rod are the same as those of the copper rod which is not fused.
When the deep fusion sleeve 7 is installed on the phase a line and is used for detecting phase a current signals and voltage signals, as shown in fig. 9, the low-power coil 7-311 is phase a line LA, and the voltage dividing resistor 7-312 is phase a resistor RA; an A-phase current signal output by an ECT circuit is arranged between AS1 and AS2 in the figure; as shown in fig. 10, the first high-voltage capacitor 7-321 and the first high-voltage capacitor 7-322 are a capacitor CAO and a capacitor CO, respectively, one end of the capacitor CAO is connected with the a-phase line, the other end of the capacitor CAO is connected with one end of the capacitor CO, and the other end of the capacitor CO is grounded; the connection end of the capacitor CAO and the capacitor CO is the positive electrode U O+ of the zero sequence voltage signal of the EVT phase voltage detection circuit, and the grounding end of the capacitor CO is the negative electrode U O- of the zero sequence voltage signal of the EVT phase voltage detection circuit; the second high-voltage capacitor 7-323 and the second high-voltage capacitor 7-324 are a capacitor CA1 and a capacitor CA2 respectively, one end of the capacitor CA1 and one end of the capacitor CA2 which are connected in series are connected with an A phase line, and the other end of the capacitor CA1 and the other end of the capacitor CA2 are grounded, the connecting end of the capacitor CA1 and the capacitor CA2 is an anode U a of an A phase voltage signal of an EVT phase voltage detection circuit, and the grounding end of the capacitor CA2 is a cathode U n of the A phase voltage signal of the EVT phase voltage detection circuit;
When the deep fusion sleeve 7 is installed on the B-phase line and is used for detecting the B-phase current signal and the voltage signal, as shown in fig. 9, the low-power coil 7-311 is the B-phase line LB, and the voltage dividing resistor 7-312 is the B-phase resistor RB; between BS 1、BS2 in the figure is the B-phase current signal output by ECT circuit; as shown in fig. 10, the first high-voltage capacitor 7-321 and the first low-voltage capacitor 7-322 are respectively a capacitor CBO and a capacitor CO, the second high-voltage capacitor 7-323 and the second low-voltage capacitor 7-324 are respectively a capacitor CB1 and a capacitor CB2, one end of the capacitor CBO is connected with the B-phase line, the other end of the capacitor CBO is connected with one end of the capacitor CO, and the other end of the capacitor CO is grounded; the connection end of the capacitor CBO and the capacitor CO is the positive electrode U O+ of the zero sequence voltage signal of the EVT phase voltage detection circuit, and the grounding end of the capacitor CO is the negative electrode U O- of the zero sequence voltage signal of the EVT phase voltage detection circuit; the second high-voltage capacitor 7-323 and the second high-voltage capacitor 7-324 are a capacitor CB1 and a capacitor CB2 respectively, one end of the capacitor CB1 and one end of the capacitor CB2 which are connected in series are connected with a B phase line, and the other end of the capacitor CB1 and the other end of the capacitor CB2 are grounded, the connecting end of the capacitor CB1 and the connecting end of the capacitor CB2 are the positive electrode U b of a B phase voltage signal of the EVT phase voltage detection circuit, and the grounding end of the capacitor CB2 is the negative electrode U n of the B phase voltage signal of the EVT phase voltage detection circuit;
When the deep fusion sleeve 7 is installed on a C-phase line and is used for detecting a C-phase current signal and a voltage signal, as shown in fig. 9, the low-power coil 7-311 is a C-phase line LC, and the voltage dividing resistor 7-312 is a C-phase resistor RC; between CS 1、CS2 in the figure is the C-phase current signal output by ECT circuit; as shown in fig. 10, the first high-voltage capacitor 7-321 and the first low-voltage capacitor 7-322 are respectively a capacitor CCO and a capacitor CO, the second high-voltage capacitor 7-323 and the second low-voltage capacitor 7-324 are respectively a capacitor CC1 and a capacitor CC2, one end of the capacitor CCO is connected with a C-phase line, the other end of the capacitor CCO is connected with one end of the capacitor CO, and the other end of the capacitor CO is grounded; the connection end of the capacitor CCO and the capacitor CO is the positive electrode U O+ of the zero sequence voltage signal of the EVT phase voltage detection circuit, and the grounding end of the capacitor CO is the negative electrode U O- of the zero sequence voltage signal of the EVT phase voltage detection circuit; the second high-voltage capacitor 7-323 and the second high-voltage capacitor 7-324 are a capacitor CC1 and a capacitor CC2 respectively, one end of the capacitor CC1 and one end of the capacitor CC2 which are connected in series are connected with a C phase line, and the other end of the capacitor CC1 and the other end of the capacitor CC2 are grounded, the connecting end of the capacitor CC1 and the connecting end of the capacitor CC2 are the positive electrode U c of a C phase voltage signal of an EVT phase voltage detection circuit, and the grounding end of the capacitor CC2 is the negative electrode U n of the C phase voltage signal of the EVT phase voltage detection circuit;
In the concrete implementation, an ECT zero-sequence current detection circuit is further arranged and comprises a zero-sequence coil L and a zero-sequence resistor R, wherein the primary side of the zero-sequence coil L is connected with the secondary sides of an A-phase coil LA, a B-phase coil LB and a C-phase coil LC, and the secondary side of the zero-sequence coil L is connected with two ends of the zero-sequence resistor R; in the figure, OS1 and OS2 are the lower ends of the voltage dividing resistors 7 to 312, OS1 is a signal line, and OS2 is a ground line.
In specific implementation, the metallic connection point adopts a spring thimble structure, so that the metallic connection point is ensured to be in metallic connection with the first high-voltage capacitor 7-321 or the second high-voltage capacitor 7-323.
In the concrete implementation, an APG process is adopted when a secondary pouring process is adopted for primary pouring; and the secondary pouring adopts a vacuum pouring and sealing process, the left hollow cavity and the right hollow cavity are sealed, and ECT/EVT signals are output by adopting shielding wires.
In the implementation, the periphery of the rear half part of the sensor is subjected to semiconductor shielding treatment so as to shield the influence of stray capacitance on the EVT; and the inner wall of the through hole at the rear half part of the sensor is subjected to semiconductor shielding treatment so as to avoid air discharge between the copper rod and the detachable ECT/EVT structure 7-3 and the rear half sleeve 7-4.
In this embodiment, as shown in fig. 11, the cable head temperature measurement system 8 includes an upper cable head joint sensor 8-1, a lower cable head joint sensor 8-2, a temperature measurement monitoring device 8-4 and a wireless transmitting module 8-5, wherein the upper cable head joint sensor 8-1 is connected to the upper cable 8-6 and is used for detecting the voltage on the upper cable 8-6, the lower cable head joint sensor 8-2 is connected to the lower cable 8-7 and is used for detecting the voltage on the lower cable 8-7, and the upper cable head joint sensor 8-1, the lower cable head joint sensor 8-2 and the wireless transmitting module 8-5 are all connected to the temperature measurement monitoring device 8-4.
In specific implementation, the cable head upper joint sensor 8-1 is fixed on the upper cable 8-6 through the cable head fixing device 8-8, and the cable head lower joint sensor 8-2 is fixed on the lower cable 8-7 through the cable head fixing device 8-8.
In this embodiment, as shown in fig. 12, the temperature measurement monitoring device 8-4 includes a sixth microprocessor module 8-41, an inductive power taking module 8-42, a battery energy storage module 8-43, and a communication module 8-44 connected to the sixth microprocessor module 8-41, where the communication module 8-44 is connected to the wireless transmitting module 8-5; the battery energy storage module 8-43 is linked with the induction power taking module 8-42, stores induction power taking electric energy and supplies power to the temperature measurement monitoring device 8-4 in a state that small current cannot be used for induction power taking; the input end of the sixth microprocessor module 8-41 is connected with a temperature sensor 8-45 for detecting the temperature of the cable head in real time, and the output end of the sixth microprocessor module 8-41 is connected with an operation indicator lamp 8-46 and a communication state indicator lamp 8-47.
In this embodiment, the wireless transmitting module 8-5 is a loRa wireless transmitting module, a WIFI wireless transmitting module, a bluetooth wireless transmitting module or an RS485 wireless transmitting module.
In specific implementation, the temperature measurement monitoring device 8-4 receives the voltage information of the upper connector of the cable head, which is sensed by the upper connector sensor 8-1 and the lower connector of the cable head, which is sensed by the lower connector sensor 8-2, analyzes and calculates each voltage difference, judges whether the voltage difference is in a set interval, and when the voltage difference of the upper connector and the lower connector of the cable accords with the set interval, the temperature measurement monitoring device 8-4 periodically transmits temperature information for reporting; when the voltage difference between the upper connector and the lower connector of the cable exceeds a set interval, the temperature measurement monitoring device 8-4 issues an active acquisition command, reads the voltage of the upper connector and the lower connector of the cable sensed by the upper connector sensor 8-1 and the lower connector sensor 8-2 of the cable again, calculates voltage difference information, and judges whether the voltage difference is in the set interval or not; when the two determinations still exceed the set interval, the temperature measurement monitoring device 8-4 issues an up-sending command, and sends out an instantaneous temperature rise or abnormal temperature information alarm of the cable head.
In specific implementation, the set interval is a set maximum value U max of the voltage difference, the maximum internal resistance R max and the electric heating power P at the rated current I are calculated according to the formula p=i R max, and then the maximum value U max of the voltage difference is calculated according to the formula U max²=PRmax.
In this embodiment, the maximum internal resistance of the cable is defined according to the national standard of the conductor of GB/T3956-2008 cable, the value of the maximum internal resistance R max is 500 mu omega, the value of the rated current I is 100A, the electric heating power P at the time of the maximum internal resistance R max and the rated current I is 5W, and the value of U max is 50mV.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (3)
1. The full-digital information interaction ring network box with the optimized structure comprises a ring network box body (1), wherein a mechanism chamber (1-5), a ring network secondary chamber (1-1), a communication chamber (1-2) and a cable chamber (1-3) are separated in the ring network box body (1) through insulating partition boards, the ring network secondary chamber (1-1) is provided with a distributed distribution terminal spacing unit (3), and the communication chamber (1-2) is provided with a distributed distribution terminal public unit (4), a power battery (5) and a power management unit (6); the method is characterized in that: the intelligent control monitoring system is characterized in that the ring network secondary chamber (1-1) is further provided with an intelligent control monitoring unit (2), the cable chamber (1-3) is provided with a depth fusion sleeve (7) and a cable head temperature measuring system (8), the top of the ring network box body (1) is independently provided with a bus PT compartment (1-4), and a bus PT (10) is arranged in the bus PT compartment (1-4);
The intelligent control monitoring unit (2) comprises a digital intelligent sensing module and an interval display module which are arranged independently, wherein the digital intelligent sensing module is used for monitoring and analyzing motor disconnection and motor stalling, for analyzing mechanical characteristics of a switch, for judging line faults and for realizing unlocking authentication and authorization of the ring main unit (1); the interval display module is used for displaying all real-time data, position states, states of monitoring equipment and events;
the depth fusion sleeve (7) comprises an insulating sleeve and an ECT/EVT structure which are assembled into a whole;
The intelligent unlocking device comprises a ring main unit box body (1), wherein a cabinet door of the ring main unit box body (1) is provided with a passive lock cylinder (9) matched with a wireless key, an intelligent unlocking circuit module and a battery for supplying power to the passive lock cylinder (9) and the intelligent unlocking circuit module are arranged in the wireless key, and the intelligent unlocking circuit module is in wireless connection and communication with a digital intelligent sensing module;
The digital intelligent sensing module comprises an energy storage motor monitoring circuit module for monitoring and analyzing motor disconnection and motor stalling, a switch mechanical characteristic analysis circuit module for analyzing switch mechanical characteristics, a line fault monitoring circuit module for monitoring line faults, and an unlocking authentication and authorization circuit module for realizing unlocking authentication and authorization of a ring main unit (1);
The energy storage motor monitoring circuit module comprises a first microprocessor module (2-1), a first AD sampling circuit (2-2) and a first RS485 communication module (2-3) which are connected with the first microprocessor module (2-1), wherein the input end of the first AD sampling circuit (2-2) is connected with an energy storage motor current detection circuit (2-4), and the first RS485 communication module (2-3) is connected with the interval display module;
The switch mechanical characteristic analysis circuit module comprises a second microprocessor module (2-5), a breaking pulse signal transmission circuit (2-8), a second AD sampling circuit (2-6) and a second RS485 communication module (2-7), wherein the breaking pulse signal transmission circuit is connected with the second microprocessor module (2-5), and the input end of the second AD sampling circuit (2-6) is connected with a voltage waveform monitoring circuit (2-9) and a current waveform monitoring circuit (2-10);
The circuit fault monitoring circuit module comprises a third microprocessor module (2-11), a third AD sampling circuit (2-12) and a third RS485 communication module (2-13) which are connected with the third microprocessor module (2-11), wherein the input end of the third AD sampling circuit (2-12) is connected with the output ends of an ECT circuit (7-31) and an EVT circuit (7-32) in the ECT/EVT structure, and the third RS485 communication module (2-13) is connected with the interval display module;
The unlocking authentication and authorization circuit module comprises a fourth microprocessor module (2-14), a first wireless communication module (2-15) and a fourth RS485 communication module (2-16) which are connected with the fourth microprocessor module (2-14), and the fourth RS485 communication module (2-16) is connected with the interval display module;
The ECT/EVT structure is a detachable ECT/EVT structure (7-3), the insulating sleeve comprises a sleeve front half part and a sleeve rear half part, a sealing buffer pad (7-5) is arranged between the sleeve front half part and the sleeve rear half part, the sleeve front half part comprises a front half sleeve (7-1) extending into a ring main box body (1) and a conductive rod (7-2) connected to the middle position of the front half sleeve (7-1) and extending backwards, the sleeve rear half part comprises a rear half sleeve (7-4) connected with the detachable ECT/EVT structure (7-3) and used for connecting a cable head, and the conductive rod (7-2) penetrates through the sleeve rear half part through a through hole arranged on the detachable ECT/EVT structure (7-3) and the rear half sleeve (7-4);
The detachable ECT/EVT structure (7-3) comprises an ECT circuit (7-31) and an EVT circuit (7-32) which are arranged side by side, the ECT circuit (7-31) comprises a low-power coil (7-311) and a voltage dividing resistor (7-312) connected with the low-power coil (7-311), the low-power coil (7-311) is sleeved on a conducting rod (7-2) and coincides with the axis of the through hole, a left empty hall is reserved below the low-power coil (7-311), and the voltage dividing resistor (7-312) is arranged in Zuo Kongtang;
the EVT circuit (7-32) comprises an EVT phase voltage detection circuit and an EVT zero sequence voltage detection circuit, wherein the EVT phase voltage detection circuit comprises a first high-voltage capacitor (7-321) and a first low-voltage capacitor (7-322) which are connected in series, and the EVT zero sequence voltage detection circuit comprises a second high-voltage capacitor (7-323) and a second high-voltage capacitor (7-324) which are connected in series; a metallic connecting point is arranged on the conducting rod (7-2) and is parallel to the low-power coil (7-311), a right empty hall is reserved below the metallic connecting point, and the first high-voltage capacitor (7-321) and the first low-voltage capacitor (7-322), the second high-voltage capacitor (7-323) and the second low-voltage capacitor (7-324) are arranged in the right empty hall;
The cable head temperature measurement system (8) comprises a cable head upper joint sensor (8-1), a cable head lower joint sensor (8-2), a temperature measurement monitoring device (8-4) and a wireless transmission module (8-5), wherein the cable head upper joint sensor (8-1) is connected to an upper cable (8-6) and is used for detecting the voltage on the upper cable (8-6), the cable head lower joint sensor (8-2) is connected to a lower cable (8-7) and is used for detecting the voltage on the lower cable (8-7), and the cable head upper joint sensor (8-1), the cable head lower joint sensor (8-2) and the wireless transmission module (8-5) are all connected with the temperature measurement monitoring device (8-4);
The temperature measurement monitoring device (8-4) comprises a sixth microprocessor module (8-41), an induction power taking module (8-42) and a battery energy storage module (8-43), and a communication module (8-44) connected with the sixth microprocessor module (8-41), wherein the communication module (8-44) is connected with the wireless transmitting module (8-5); the battery energy storage module (8-43) is linked with the induction electricity taking module (8-42) and is used for storing induction electricity taking electric energy and supplying power for the temperature measurement monitoring device (8-4) in a state that small current cannot be used for induction electricity taking; the input end of the sixth microprocessor module (8-41) is connected with a temperature sensor (8-45) for detecting the temperature of the cable head in real time, and the output end of the sixth microprocessor module (8-41) is connected with an operation indicator lamp (8-46) and a communication state indicator lamp (8-47).
2. A structurally optimized all-digital information interaction ring main unit according to claim 1, characterized in that: the interval display module comprises a fifth microprocessor module (2-17), a display screen (2-18) connected with the fifth microprocessor module (2-17) and a fifth RS485 communication module (2-19).
3. A structurally optimized all-digital information interaction ring main unit according to claim 1 or 2, characterized in that: the wireless transmitting module (8-5) is a loRa wireless transmitting module, a WIFI wireless transmitting module, a Bluetooth wireless transmitting module or an RS485 wireless transmitting module.
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