690 results about "Ring network" patented technology

The invention discloses a power transmission line fault diagnosis and operation and maintenance scheduling method and system based on networking learning, and relates to the technical field of power transmission line fault diagnosis operation and maintenance scheduling. Related data is extracted to construct a high-risk equipment area and a visual high-risk area thermodynamic diagram, a visual risk grading diagram is constructed in combination with electrical quantity data, and meanwhile, an intelligent recognition storage network and a fault type classification recognition model are constructed in combination with a convolutional neural network-long and short-term memory network hybrid model; the model is optimized through networking learning and an attention mechanism, maintenance teams and resources are autonomously allocated in combination with an operation and maintenance management system, then autonomous optimization and closed-loop operation are achieved, full-process coverage of fault sensing, intelligent decision making and efficient response is achieved, the response time after a line fault occurs is remarkably shortened, and the maintenance efficiency is improved. And the fault handling and operation maintenance capabilities of the power grid system are comprehensively enhanced.

The invention relates to the technical field of fault prediction and health management, in particular to a primary and secondary fusion complete ring main unit fault diagnosis method and system. Comprising the following steps: acquiring three-phase instantaneous voltage and current signals in real time, and converting the signals into digital transient data; performing time window preprocessing on the digital transient data, and executing wavelet packet decomposition to generate a transient feature vector; calculating and analyzing the transient feature vector through a transient zero-sequence power direction method and a support vector machine model to generate a local diagnosis result; when the local diagnosis result is that cooperative positioning needs to be started, a transient current similarity coefficient and a transient waveform intensity difference coefficient are calculated based on the digital transient data, and a comprehensive positioning result is generated; determining a fault line according to the comprehensive positioning result, and generating a remote control command; and executing a fault isolation operation based on the remote control command, and executing a PHM process. According to the method, the double local transient diagnosis and the cross-terminal cooperative positioning are deeply fused, so that the high-precision determination of the boundary of the fault section is realized.

The invention relates to a self-adaptive cooperative control system and method for a sodium-ion battery energy storage system, and relates to the technical field of energy storage system control. An EMS-BMS-PCS cooperative control module is customized, a three-level architecture dynamically adjusts a voltage threshold value, and the SOC is corrected; the multi-stage active safety protection module comprises battery cell monitoring, fault battery cell ejection, modular battery replacement and three-stage fusing protection; the power grid response module PCS performs high-frequency sampling and supports grid-connected and off-grid switching and AGC / AVC service; the intelligent collaborative optimization engine integrates data to generate a charging and discharging strategy, and early warning is performed 14 days in advance for predictive maintenance; the layered distributed control module is used for realizing battery cell-to-system level management; and the double-ring network communication redundancy module ensures real-time transmission of instructions. According to the invention, the DoD and capacity utilization rate of the sodium-ion battery is improved, and the system economy is enhanced; heat spreading is blocked through multi-stage protection, the maintenance time is shortened, and the safety is improved; millisecond-level response meets the high-order demand of a power grid, predictive maintenance reduces the operation and maintenance cost, and the method is suitable for multiple energy storage scenes.

The invention relates to the technical field of power distribution automation auxiliary power supply control, and discloses an intelligent power distribution circuit system for a digital ring main unit, which comprises a transient voltage gradient induction bridge circuit, a hardware signal processing circuit, a power switch unit and a controlled energy release unit, according to the system, a transient voltage gradient induction bridge circuit is used for collecting a primary side bus voltage change rate signal, a hardware signal processing circuit carries out derivation operation on an induction signal and compares the induction signal with a voltage gradient threshold value, and a power switch unit is blocked at the moment that the voltage abnormally drops so as to cut off a load current path. According to the invention, a hardware parameter direct mapping mechanism is utilized to realize microsecond transient protection response, and the physical decoupling of protection logic and digital software is realized by balancing bus potential pulse caused by sudden unloading of a load through the inherent dehumidification resistor in the multiplexing cabinet.

The invention provides a full-period operation data monitoring method and system applied to an intelligent ring main unit, and the method comprises the steps: collecting multi-mode operation data in a full period in real time through operation data collection nodes disposed at all electrical nodes of the intelligent ring main unit; based on a preset time sequence feature extraction rule, performing segmentation alignment processing on the multi-mode operation data, and generating a full-period state parameter corresponding to each electrical node; training an operation monitoring model matched with the intelligent ring main unit according to the full-period state parameters; performing layer-by-layer analysis on the multi-modal operation data acquired in real time through the operation monitoring model, and generating a health degree score and an abnormal confidence interval corresponding to the current operation stage; and triggering an early warning signal or a model updating instruction matched with a preset threshold value, and dynamically adjusting the network parameters of the operation monitoring model. According to the method, multi-modal dynamic characteristics can be deeply fused, model parameters are optimized in real time, and a full-period monitoring system with effective feedback is formed.

The invention discloses a primary and secondary fusion ring main unit fault rapid isolation method and system, and relates to the technical field of power distribution network automation. The method comprises the following steps: acquiring topological characteristics of each node of the ring main unit and performing validity verification to generate an effective topological fingerprint; constructing a dynamic time sequence fault tree model based on the topological fingerprints, and obtaining a minimum cut set with time sequence constraints through space-time decoupling; based on the minimum cut set, a fault isolation strategy is generated through reinforcement learning, and safety verification is carried out; and based on the isolation strategy passing the verification, pre-judging a future topology state through topology deduction and generating a trigger signal. Through dynamic topological feature extraction and verification, reliable basic data is provided for the primary and secondary fusion ring main unit, and the adaptive capacity of the primary and secondary fusion ring main unit in a topological change scene is enhanced; by means of dynamic time sequence fault tree modeling, the fault evolution law is accurately captured, the limitation of a traditional static model is broken through, and the accuracy of fault positioning is improved.

This invention provides a method, apparatus, electronic device, and readable storage medium for redundancy control in ring network communication, relating to the field of vehicle-mounted communication. The method includes: controlling nodes in the vehicle-mounted ring network system to detect abnormal Ethernet link states and broadcast these states via CAN communication; a master control node can determine whether to switch redundant links based on the relevant link abnormal states of each node; if switching is required, a switching control message is broadcast via CAN communication; and each node can adjust its port settings based on the switching control message. By implementing Ethernet link detection and redundant link switching control based on Ethernet communication itself, and by integrating the functions of determining whether to switch links based on abnormal link states and broadcasting switching control messages into the master control node, the requirements for nodes other than the master control node are reduced. This lowers the hardware resource requirements of the vehicle-mounted ring network communication redundancy control scheme compared to existing solutions, making it simpler, easier to implement, and more usable.

The invention relates to the technical field of ring main units, and provides a self-adaptive protection device for a ring main unit, which comprises a cabinet body, a gas tank mounted on the back of the cabinet body and filled with environment-friendly insulating gas, and a pressure relief pipe with one end communicated with the top of the gas tank and used for pressure relief of the gas tank, the top of the gas tank is provided with a pressure relief regulation and control assembly, and the top of the pressure relief regulation and control assembly is provided with a dustproof assembly. The pressure relief regulation and control assembly comprises a funnel-shaped main speed discharging barrel arranged at the top of the air box and a butt joint sleeve for connecting the main speed discharging barrel with the pressure relief pipe in a sealed mode. During use, the main pressure relief channel and the branch slow-heating pressure relief channels are utilized and respond to instantaneous high-pressure impact and continuous hot pressing respectively, so that deformation and damage of the gas tank caused by instantaneous arcing overpressure are effectively prevented, and the potential safety hazard that pressure accumulation caused by abnormal slow temperature rise cannot be released in time is eliminated; and self-adaptive protection of the ring main unit gas tank is realized.

The invention relates to the field of power system carbon emission flow analysis, in particular to a closed-loop power grid-oriented electric energy tracking and power flow tracing coupled carbon emission flow analysis method, which is based on power flow distribution of an actual power grid and comprehensively utilizes an electric energy tracking method and a power flow tracing method. According to the invention, fine allocation and full-link physical traceability of nodes, branches and loads in a closed-loop power grid structure by carbon emission are realized. By establishing a power flow distribution matrix, a unit injection matrix, a load distribution matrix and a carbon emission intensity vector, the carbon potential of each node, the branch carbon flow rate and the load carbon flow rate are calculated in a recursive manner, an electric energy tracking method and power flow traceability are coupled, and node allocation is iteratively optimized, so that the actual flow path and spatial distribution characteristics of the carbon flow in a power grid are disclosed. The method can adapt to scenes such as complex multi-source access and a looped network structure, the scientificity and fairness of closed-loop power grid carbon emission management are improved, and theoretical and method support is provided for development of low-carbon scheduling, carbon accounting and low-carbon economy.

The invention relates to the field of edge computing, in particular to a primary and secondary fusion complete ring main unit energy efficiency optimization system based on cloud edge collaboration. The system comprises an edge device deployment and data acquisition module used for collecting operation electric parameters and device states and generating a service calling request; the service calling module is used for screening target control parameters under security constraints based on the energy efficiency optimization service package; the data synchronization module unloads the data to a cloud platform through a message queue protocol; the cloud service arrangement module aggregates the data updating service package and issues the data updating service package to the edge; and the real-time control module converts the parameters into instructions to drive equipment to act. A cloud training and edge reasoning collaborative architecture is adopted, the problems that local control lacks adaptivity, edge resources are limited and full-cloud control communication time delay exists are solved, and real-time energy efficiency optimization is achieved.

The invention belongs to the technical field of power equipment protection, and relates to an anti-condensation control method and system for a power ring main unit, and the method comprises the steps: collecting the internal temperature and humidity data of power equipment in real time through a high-precision temperature and humidity sensor, controlling the energy storage and release of a phase change energy storage module according to the collected temperature and humidity data, and controlling the energy storage and release of a phase change energy storage module according to the environment change. The rotating speed of a fan and the opening degree of a ventilation valve are adjusted, air circulation is achieved, when it is detected that the humidity in the equipment is too high, a humidity adjusting module is started, the humidity is reduced through a moisture absorption technology, and water vapor condensation is avoided; according to real-time data and a preset algorithm, a temperature and humidity adjusting strategy is optimized, accurate control over the internal environment of the equipment is achieved, and safe operation is ensured. The stability of temperature and humidity regulation and control in the power ring main unit can be effectively improved, the dehumidification efficiency is improved, and the system is particularly suitable for condensation prevention and control of an outdoor high-voltage ring main unit and has the advantages of being efficient, capable of saving energy, intelligent in cooperation and high in reliability.

The invention relates to the technical field of electric power, in particular to a primary and secondary fusion environment-friendly ring main unit intelligent monitoring system and method, and the system comprises a data collection module which is used for collecting multi-mode monitoring data of a ring main unit to obtain an original monitoring data set; the data processing module is used for performing standardization processing on the original monitoring data set to obtain a standardized multi-modal monitoring data set; the intelligent monitoring module is used for performing state evaluation based on the standardized multi-mode monitoring data set to obtain an equipment state monitoring evaluation result; the digital twinning module is used for constructing a digital twinning model and performing digital twinning analysis on the equipment state monitoring and evaluation result through the digital twinning model to obtain a health index and a fault risk prediction result; the strategy generation module is used for generating an operation and maintenance strategy set based on the health index and the fault risk prediction result; and the strategy execution module is used for executing operation and maintenance operation according to the operation and maintenance strategy set and recording an operation and maintenance execution effect.

The invention relates to a master-slave communication circuit and method for constructing a ring network based on an RS485 bus, and belongs to the technical field of communication, and the master-slave communication circuit forms the ring network by a host and a plurality of slaves. The host is provided with an RS485 port 1 and an RS485 port 2, the slaves are sequentially connected end to end to form a ring, the head end is connected with the host port 1, and the tail end is connected with the port 2. And the slave circuit comprises two RS485 driving chips, two groups of AB ends are respectively connected in series with the bus, and T / R ends are respectively connected with IO1 / IO2 of the MCU. The RXD1 / RXD2 of the MCU is connected with the RO ends of the two chips, and the TXD1 / TXD2 of the MCU is connected with the DI ends of the two chips. The circuit comprises four diodes, wherein the cathode of D1 is connected with a connection point of RXD1 and RO, and the anode of D1 is connected with a connection point of TXD2 and DI; the cathode of D2 is connected with the RXD2 and RO connection point, and the anode of D2 is connected with the TXD1 and DI connection point; the cathode of D3 is connected with TXD1, and the anode is connected with the connection point of TXD1 and DI; the cathode of D4 is connected with the TXD2, and the anode is connected with the connection point of the TXD2 and the And one ends of the two resistors R1 and R2 are connected with VCC, and the other ends are respectively connected with the two DI ends. The method has the advantages that when the bus breaks down, normal operation of the system is not affected, and the communication distance of the bus is prolonged.

The invention discloses a planning method and system for a high-reliability current collection system of an offshore floating type wind power plant, and the method comprises the steps: applying a looped network topology in the current collection system of the offshore floating type wind power plant to improve the operation reliability, and enabling the looped network topology to be an electrical connection mode that a plurality of fans are connected into a closed loop through cables; wherein the energy can flow bidirectionally, and performing two-stage dynamic planning for the current collection system: firstly executing dynamic site selection and topology planning of an offshore substation, then executing optimization and topology planning of substations by fans, and outputting the optimal substation position, fan distribution set and wind power plant planning total cost. The method aims at rapidly achieving dynamic multi-target planning of the offshore floating type wind power plant so as to ensure the operation reliability of the offshore floating type wind power plant and the economical efficiency of the whole life cycle cost, precise optimization of substation site selection is achieved, and the optimal configuration of the membership relation of fans and substations is ensured.

Provided are a method and apparatus for transmitting data, relating to the technical field of communications. The method comprises: a first node sends a fault detection sequence to a second node, the sequence comprising a plurality of spaced apart pieces of fault detection information. The first node receives fault notification information sent by the second node, the fault notification information being determined by the second node on the basis of the number of pieces of fault detection information received within a preset window. The first node sends a first buffered packet and a second user packet on the basis of a switching path, the first buffered packet being obtained by buffering a first user packet sent to the second node within the preset window, and the packet sequence number of the second user packet being greater than the packet sequence number of the first user packet. In this way, since the first node sends the buffered packet within the preset window to the second node on the basis of a switching path, the first user packet sent by the first node to the second node within a preset window in which a link fault has occurred can reach the second node, thereby resolving the problem of packet loss in ring network switching technology.

The invention discloses a visual intelligent electrical loop automatic test system and a test method thereof, and belongs to the technical field of circuit testing, and the system comprises a main control unit, a multipath signal acquisition unit, a broadband impedance spectroscopy analysis unit, an automatic switching circuit unit, a communication unit and a man-machine interaction unit. The multi-path signal acquisition unit is connected with the main control unit and is used for synchronously acquiring voltage and current signals of a ring main unit control loop, a remote signaling loop and a remote measuring loop; the multipath signal acquisition unit comprises a voltage detection unit, a current detection unit and a control loop disconnection detection unit. The broadband impedance spectroscopy analysis technology is applied to loop fault positioning, millimeter-level accurate positioning of faults such as poor contact and short circuit can be achieved, the pain point that problems are difficult to find is fundamentally solved, and for complex faults such as motor stalling, double criteria of a current curve and a rotating speed signal are adopted, so that accurate positioning of the faults is achieved. Misjudgment possibly caused by single current detection is effectively avoided, and the diagnosis result is more reliable.

The invention relates to the technical field of coal mine dynamic mine pressure monitoring and intelligent early warning and prediction, and particularly discloses a coal mine dynamic mine pressure monitoring and intelligent early warning and prediction system, which comprises a monitoring terminal layer, which comprises a plurality of mine pressure monitoring sensors, and the mine pressure monitoring sensors are respectively arranged in different monitoring areas of an underground coal mine. The mine pressure parameter acquisition module is used for acquiring mine pressure parameters of a corresponding area in real time, and the mine pressure parameters comprise roof subsidence, support working resistance, coal seam stress and surrounding rock deformation; and the data transmission layer is connected with the monitoring terminal layer and comprises an underground ring network switch and a ground industrial Ethernet. According to the dynamic mine pressure monitoring and intelligent early warning prediction system for the coal mine, the data reliability is ensured in combination with sensor state monitoring, the mine pressure trend in the next 24 hours is accurately predicted by adopting an improved LSTM neural network and an AWA-GC optimization algorithm, and the system adapts to nonlinear changes under complex geological conditions.

The invention relates to a load monitoring method, device and equipment for an intelligent ring main unit and a medium, and the method comprises the steps: determining the dynamic change characteristics of the real-time operation parameters of a plurality of state monitoring points in the ring main unit, and generating a load distribution state set based on the load difference value of the dynamic change characteristics and a preset weight distribution strategy; a switch opening and closing angle parameter and an operation duration parameter are extracted as decision variables according to the load distribution state set, the decision variables are optimized, and a parameter optimization set corresponding to a control strategy is obtained; collecting environment parameter data, establishing a mapping relation between the environment parameter data and the control strategy, and generating an environment optimization set; state estimation and constraint modeling are carried out on the real-time operation parameters, and a corresponding load threshold set is dynamically generated; and performing fault prediction on the data change condition of the state monitoring point according to the load threshold set, and generating a fault distribution prediction value. According to the invention, the monitoring comprehensiveness of the ring main unit is improved.

The application relates to the technical field of ring network boxes, and discloses a primary and secondary fusion ring network box which comprises a box body and a box door, the box door is rotationally connected to the box body, a plurality of supporting strips are arranged on the box body, supporting rods are rotationally connected to the supporting strips, rotating wheels are fixedly connected to the supporting rods, and a fixing structure is arranged on the box body and used for fixing the box body. The rotating wheels are fixedly connected to the supporting rods, the rotating wheels can drive the box body to rotate, the box body can be dismounted from the cabinet by a worker, the ring network box can be taken out from the cabinet, and the ring network box can be maintained and processed. Meanwhile, the fixing structure fixes the box body, the box body is not prone to sliding in the cabinet, and the situation that the box body shakes due to ground vibration is reduced.

The invention belongs to the field of underground equipment monitoring, particularly relates to a coal mine underground equipment real-time monitoring method based on a red mine system, and aims to solve the technical problems of low information transmission speed and low accuracy of manual monitoring equipment. The method comprises the following steps: acquiring underground equipment information in real time through a sensor and an adaptive module of a red mine system; the Modbus TCP protocol data stream is uploaded and converted into a Modbus TCP protocol data stream; the data stream is transmitted to a centralized management and control platform through an underground looped network; on the gateway side, edge side preprocessing is carried out on the collected data stream; and the centralized management and control platform receives the processed data flow, carries out platform-level data cleaning and fusion processing, and carries out real-time state monitoring, health degree evaluation and fault early warning on the equipment. According to the invention, the centralized management and control platform is established by adopting the Hong mine system to monitor and manage the underground equipment in a unified manner, so that the intelligent level, the information transmission speed and the accuracy of a coal mine are improved, and real-time monitoring, fault early warning and maintenance management can be better carried out on the underground equipment.

The invention relates to the technical field of the intelligent power grid industry, in particular to a power distribution and utilization ring network fault intelligent troubleshooting method and system. According to the method, a looped network situation primitive is generated through multi-source heterogeneous data fusion. The primitives are input into synchronous compression transformation to extract transient fault initial features, and the transient fault initial features are mapped into fault propagation path features through a graph convolutional network considering topological structure constraints; then, inputting the features into a space-time correlation prediction model, integrating defect type judgment and trend pre-judgment features, and generating a fault diagnosis evidence set; and starting an investigation mechanism based on the evidence set to determine an interval to be investigated, and performing closed-loop verification by constructing a fusion judgment matrix based on multi-modal physical sensing information to realize physical space locking of a fault defect point. According to the method, deep learning diagnosis and multi-mode positioning are integrated, and the detection precision and the positioning efficiency of looped network defects and the identification capability of transient hidden faults are effectively improved.

The invention discloses a method and a system for monitoring and controlling a ring main unit based on multi-source data. The method comprises the following steps: acquiring real-time monitoring data of electrical parameters, environmental parameters and equipment state parameters of the ring main unit through a multi-source sensor network; constructing an adaptive weight fusion algorithm with a data quality evaluation mechanism, performing reliability evaluation on the multi-source data, and outputting a fused multi-dimensional feature vector; establishing a deep convolutional neural network model based on a multi-scale attention mechanism, and performing time sequence and space double attention analysis on the multi-dimensional feature vector to realize fine recognition of the operation state; constructing a time sequence prediction model based on a state identification result, analyzing an operation trend, predicting a potential fault, and generating a grading early warning signal and a fault prediction report; and generating an optimal control strategy according to the early warning signal and executing a control instruction. Accurate identification, trend analysis and fault early warning of the operation state of the ring main unit are realized, and technical support is provided for safe and stable operation and intelligent operation and maintenance of a power distribution network.

The application discloses a power transmission line fault diagnosis and operation and maintenance scheduling method and system based on network learning, relates to the technical field of power transmission line fault diagnosis and operation and maintenance scheduling, and comprises the following steps: acquiring electrical quantity data, equipment operation state data, ring network topology and time sequence data and the like, extracting relevant data to construct a high-risk equipment area and a visual high-risk area heat map, combining the electrical quantity data to construct a visual risk classification map, combining a convolutional neural network-long short-term memory network hybrid model to construct an intelligent recognition storage network and a fault type classification recognition model, optimizing the model through network learning and an attention mechanism, combining an operation and maintenance management system to autonomously allocate a maintenance team and resources, and then realizing autonomous optimization and closed-loop operation, so that the application realizes full-process coverage from fault perception, intelligent decision and efficient response, significantly shortens the reaction time after line fault occurrence, and comprehensively enhances the fault disposal and operation and maintenance capability of the power grid system.

The invention provides a carrier pigeon foot ring data reporting scheduling method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining carrier pigeon foot ring data, carrying out the data preprocessing, generating a carrier pigeon density distribution thermodynamic diagram, and evaluating the motion state of a carrier pigeon according to the current position data and historical competition data of the carrier pigeon; according to the homing pigeon foot ring data and the base station historical data, predicting the real-time load of each base station through the constructed multi-modal space-time fusion prediction model; determining an access conflict occurrence probability according to the position and the motion state of the foot ring of the carrier pigeon and a base station load prediction result, carrying out space-time two-dimensional grouping on the foot ring of the carrier pigeon, and generating and issuing a foot ring network access and information reporting strategy according to grouping information; a base station load state and a carrier pigeon state in a competition process are monitored in real time, and a foot ring network access and information reporting strategy is dynamically adjusted based on a dynamic parameter optimization mechanism. According to the invention, terminal access congestion is avoided, the terminal access speed is effectively improved, and the terminal access power consumption is reduced.

The invention relates to the technical field of network communication, in particular to a high-efficiency message routing method of an independent gateway controller, which comprises the following steps of: constructing a routing table by analyzing network topology in a mode of combining a dynamic routing protocol with static configuration, mapping and storing a target address and a forwarding path, and transmitting a message to the gateway controller; the method comprises the following steps of: analyzing a source protocol frame structure to extract effective load data, repackaging the data according to a target protocol specification, realizing link redundancy by adopting a ring network protocol, automatically switching a standby link and maintaining an equivalent path when a main link fails, and obtaining a flow trend and performance data by monitoring a network load and an equipment state in real time. And dynamically adjusting a routing strategy according to the data, and periodically generating a performance report to obtain a continuously optimized routing scheme. According to the method, the problems that the routing table query efficiency is low and the routing strategy cannot be dynamically optimized according to the real-time state of the network in the traditional method are solved.

The invention relates to the technical field of civil engineering structure safety monitoring and Internet of Things communication, in particular to a bridge and tunnel structure health monitoring system and a looped network fault self-healing communication method. The system comprises a sensing acquisition layer, a ring network communication layer and a monitoring application layer, wherein the sensing acquisition layer comprises a plurality of data acquisition nodes which are deployed at key parts of a bridge and a tunnel in a distributed manner and is used for acquiring physical response data; according to the ring network communication layer, data acquisition nodes are connected in series through communication links to form a physical closed-loop topology, and each data acquisition node is provided with double communication ports and is connected with adjacent network equipment; the ring network communication layer operates an intelligent route switching mechanism, and can control nodes to switch a route path when a fault occurs. Through the three-level architecture, the physical closed-loop topology, the double communication ports and the intelligent route switching mechanism, the single-point fault hidden danger of a traditional communication architecture is solved from the source, and the system communication reliability and the data transmission continuity are greatly improved.

The application discloses a communication system, related equipment and method. The communication system comprises a CO device and a plurality of RRHs. The plurality of RRHs form a ring network through optical fibers, and the CO device is connected to the ring network. The CO device is used for modulating a baseband signal onto N first optical carriers generated by the CO device to obtain N second optical carriers, and transmitting the N second optical carriers to the ring network through a first optical fiber. Any one of the plurality of RRHs is used for obtaining a target optical carrier from the received second optical carrier, converting the target optical carrier into an electrical signal, and transmitting the electrical signal as a downlink signal. The embodiment of the application realizes an all-optical communication system through the layout of optical devices on the architecture and through the optical ring network topology, and the communication system has a self-healing protection function.

This invention relates to a high-reliability ring main unit, comprising: an outer casing assembly, the outer casing assembly including an outer casing, a receiving cavity, a first communication channel, and a flow channel. The receiving cavity is formed on the inner side of the outer casing, and several first communication channels are recessed on one side of the inner side of the receiving cavity. Several flow channels are recessed on the inner bottom wall of the first communication channel, and the flow channels intersect with the horizontal plane. Through the use of a ventilation assembly and an exhaust assembly, outside air passes through a square cylinder, successively passing through a first sieve, a second absorbent cloth, and another second sieve, finally entering the receiving cavity. Dust in the air is blocked by the first sieve, and moisture in the air is removed by the second absorbent cloth, preventing moisture in the air from affecting the normal operation of the equipment inside the receiving cavity. Hot air in the receiving cavity is pushed out through the second exhaust channel, the first exhaust channel, and the intermediate cavity, thus cooling the equipment inside the receiving cavity.

The invention belongs to the technical field of intelligent power grid protection, and discloses an intelligent medium-voltage looped network switch cabinet emergency protection method, which comprises the steps of obtaining real-time electrical state data of each switch cabinet in looped network topology and performing multi-parameter electrical coupling analysis on the real-time electrical state data to obtain a dynamic electrical association diagram; fault identification is carried out based on the dynamic electrical association diagram to obtain fault source nodes, and a fault propagation path prediction matrix is constructed according to the positions of the fault source nodes and electrical coupling strength distribution characteristics; calculating the breaking time sequence priority of each switch cabinet in combination with the diffusion time sequence probability and the load importance to obtain a linkage breaking instruction sequence; mechanical response time delay and arc extinguishing time dynamic adjustment and real-time increment updating are carried out on the linkage breaking instruction sequence; according to the method, the accuracy of fault isolation and the coordination of protection actions are remarkably improved, and high-quality technical support is provided for looped network power supply protection and intelligent operation and maintenance.