21 results about "Double loop network" patented technology

The invention provides a rail transit power supply digital twin system and a construction method, and relates to the technical field of data processing, and the method comprises the steps: constructing an urban rail transit power supply system digital twin model, achieving the digital virtualization associated with a physical entity, completing the model rendering, and displaying the state of the entity through a virtual model; according to the entity state, operating parameters of a substation and key equipment of a contact network are collected through a sensor and a hardware device; the operation parameters are cached by the station-level monitoring device body through the double-ring network architecture and then scheduled to a cloud platform communication ring network node, a data transmission path is optimized based on a load balancing strategy, and the data are uploaded to a cloud platform in real time. The management level can be improved, the operation and maintenance cost can be reduced, and a foundation is laid for intelligent operation and maintenance of a rail transit power supply system.

The invention relates to the technical field of mine ventilation, and provides a mine ventilation intelligent prediction method based on a cloud computing platform, which is characterized in that in data acquisition and processing, an innovative sensor deployment and subnet cooperation mechanism is adopted, and data continuity and reliability are guaranteed; the data transmission network adopts the design of double-base-station hot standby, optical fiber double-ring network and the like, the stability is far better than that of a traditional network, and data loss is basically eradicated; in the aspect of prediction model, a unique CFD physical model and lightweight neural network hybrid architecture can accurately identify working conditions and switch prediction modes, the prediction precision is improved compared with that of a traditional single model, and the advantages are obvious under complex working conditions; the safety and fault processing mechanism is complete, data safety is ensured through data encryption, authority grading, remote disaster recovery and the like, rapid switching compensation can be achieved during faults, multiple regulation and control modes are supported, and different scene requirements are met.

The invention relates to the technical field of double-loop network links, and particularly discloses a redundancy system of a double-loop network link, which comprises a main rack and a plurality of extension racks, and is characterized in that the main rack comprises a first controller, a second controller, a first CPU module base, a second CPU module base, a plurality of first I / O modules and a plurality of first I / O module bases, the first CPU module base is positioned at the head end of the main frame; according to the invention, by optimizing the network layout and reducing the transmission hop count of the data packet in the double-loop network, the network delay is reduced, the redundancy is ensured, the complexity of a redundant path is reduced as much as possible, the introduction of excessive extra delay is avoided, and a switch with high forwarding rate and low delay is selected, so that the overall performance of the network is improved, and the network performance is improved. High-quality optical fibers and cables are adopted, signal attenuation and transmission delay are reduced, and the length and complexity of a transmission path are correspondingly reduced, so that the phenomenon that network response time is increased is avoided, and use by people is facilitated.

The application discloses a kind of urban rail transit full flexible DC power supply systems, including centralized power supply system and decentralized power supply system, centralized power supply system includes at least two independent main substation, and is supplied to multiple substations by medium voltage network, and main substation is accessed two-way external power supply and is respectively output to I section medium voltage bus, Ⅱ section medium voltage bus by converter device;I section medium voltage bus, Ⅱ section medium voltage bus are connected with the medium voltage bus of substation;Decentralized power supply system is provided with at least two settings in substation opening and closing station, and is supplied to adjacent substation by medium voltage network, and opening and closing station is accessed two-way external power supply and is output to the medium voltage bus of substation by converter device;The medium voltage network of two kinds of power supply systems is connected with double loop network scheme or loop network scheme;Substation is provided with two energy routers for mutual standby, and the input end of energy router is respectively connected I section medium voltage bus or / and Ⅱ section medium voltage bus.

The application discloses a multi-ring network data transmission architecture, a data processing node control method and a storage medium, relates to the field of ring network architecture control, and comprises the following steps: each data processing node is configured with a first independent communication board card, a second independent communication board card, a first processor board card, a backboard and a memory; the first independent communication board card and the second independent communication board card are connected in series to two ring networks; the first independent communication board card, the second independent communication board card, the first processor board card and the memory are all hot-pluggable; and the first independent communication board card, the second independent communication board card and the memory are in communication connection with the first processor board card. According to the application, the first independent communication board card is connected in series to the first ring network, and the second independent communication board card is connected in series to the second ring network, so that data processing can still be maintained by another independent communication board card and the ring network where the independent communication board card is located when any independent communication board card fails, and the operation reliability of the double-ring network data transmission architecture adopted by the DCS platform is improved.

The invention relates to the technical field of power distribution network frame construction, in particular to a power distribution network frame construction method based on zero planned power outage, which comprises the following steps of: by constructing a standardized network frame (overhead single / moderate contact and cable single / double ring networks), controlling the tipping capacity of each section or branch within 2000kVA and not more than five transformers; it is ensured that the maintenance power failure load does not exceed the power supply capacity of the 10kV medium-voltage generator car (1000kW); and meanwhile, a standby interval is reserved in the looped network equipment for accessing the generator car, and systematic transformation paths such as non-standard wiring optimization, wheeling capability improvement and standard exceeding node treatment are provided. According to the method, zero-plan power failure of power distribution network maintenance is realized, and the power supply reliability and the user satisfaction are remarkably improved.

The utility model provides a power distribution automation demonstration platform for simulating a double-loop network line, which relates to the technical field of power distribution automation and comprises a plurality of switching stations and a power supply unit, the switching stations are connected with the power supply unit through the double-loop network line, and the switching stations are connected with the power supply unit through the double-loop network line. A comprehensive measurement and control unit, a plurality of distributed protection measurement and control units and a plurality of analog switches are arranged in each switching station, each analog switch is matched with one distributed protection measurement and control unit, and each distributed protection measurement and control unit is connected with the comprehensive measurement and control unit. According to the utility model, various fault types of a multi-power supply system can be simulated, the fault simulation function is complete, the demonstration of power supply recovery of distribution automation distributed function faults can be effectively realized, and the operation condition of a field power network is visually reflected.

The application relates to the technical field of power distribution network architecture, and provides a layered power distribution network system, a building method and a collaborative load transfer control method.The layered power distribution network system comprises a main layer, a secondary main layer and a user layer.The main layer comprises three or four switch stations, and all the switch stations in the main layer are connected through cables to form a closed loop network structure.The total number of power supply paths of the closed loop network structure is equal to twice the number of the switch stations.The secondary main layer comprises a plurality of segments formed by power supply lines, each segment is interconnected through a looped network cabinet, and each segment is connected to different switch stations in the main layer to form a single loop network or a double loop network structure.The user layer comprises a power distribution room, the power distribution room is provided with double power supply access equipment, the double power supply access equipment comprises a first access point and a second access point, the first access point is connected to the looped network cabinet in the secondary main layer, and the second access point is connected to the switch station in the main layer.The application solves the problem that self-healing is difficult to implement under the conditions of tight interval resources in substations and limited line corridors.

The utility model relates to the technical field of fan communication, in particular to a fan communication double-ring network device assembly box which comprises a fan monitoring assembly box, supporting seats are symmetrically and fixedly installed on the inner wall of the fan monitoring assembly box, a sliding plate is arranged on the upper sides of the supporting seats in a sliding mode, and an installation plate is arranged on the upper side of the sliding plate. A fan communication double-loop network module is mounted on the upper side of the mounting plate, a control mainboard is fixedly mounted on the inner wall of the fan monitoring assembly box, and fixing assemblies are arranged at the four corners of the mounting plate; the fixing assembly comprises a square column, a plurality of through grooves are formed in the sliding plate, the square column is inserted into the inner sides of the through grooves, a crimping lug plate is fixedly installed on the side edge of the upper end of the square column and crimped to the upper side of the mounting plate, a threaded column is fixedly installed at the bottom of the square column, and a nut is installed at the lower end of the threaded column in a threaded mode. According to the communication double-loop network module device, through cooperation of the fixing assembly and the sliding plate, convenience is provided for installation and later-stage disassembly and maintenance work of the communication double-loop network module device, and practicability is enhanced.

The present invention relates to the technical field of electrical variable measurement, and specifically discloses a distributed power source access unit, an intelligent fusion terminal and an electric energy meter for photovoltaic accommodation, which are used to solve the problem that the existing distributed photovoltaic accommodation system only relies on one-time linkage scheduling and is difficult to take into account the multi-time sequence requirements of millisecond-level dynamic support, second-level closed-loop compensation and minute-level economic scheduling. It includes a distributed power source access unit, an intelligent fusion terminal and an electric energy meter; based on a closed-loop scheme of multi-level control, dual-ring network logic and virtual unit aggregation, the present invention realizes the rapid response, economic optimization and reliable operation of a high-penetration photovoltaic system.

The embodiment of the invention discloses a redundancy high-reliability communication device based on a double-ring network and a platform door system, and relates to the technical field of communication, the redundancy high-reliability communication device comprises a first industrial personal computer, a second industrial personal computer, a first switch, a second switch, a main optical fiber ring network, a standby optical fiber ring network and a local controller; the first industrial personal computer is respectively connected with the first switch and the second switch, and the second industrial personal computer is respectively connected with the first switch and the second switch; the first switch is respectively connected with the main optical fiber ring network and the standby optical fiber ring network, and the second switch is respectively connected with the main optical fiber ring network and the standby optical fiber ring network; and the local controller is respectively connected with the main optical fiber ring network and the standby optical fiber ring network. According to the invention, single-point faults of the control layer, the network core layer, the transmission layer and the terminal access layer can be eliminated, and the reliability, the real-time performance and the availability of communication of the platform door system are remarkably improved.

The utility model discloses a main control topological structure of a redundant ring network of a wind generating set. The main control topological structure comprises a main controller, a standby controller, a first switch, a second switch, a third switch, a fourth switch, a first slave station, a second slave station, a third slave station, a fourth slave station, a fifth slave station and a sixth slave station, the main controller, the standby controller, the first switch, the second switch, the first slave station and the second slave station are all arranged in a tower footing of the wind generating set; the third switch, the fourth switch, the third slave station, the fourth slave station, the fifth slave station and the sixth slave station are all arranged in a cabin of the wind generating set; according to the utility model, a double physical looped network architecture is adopted, millisecond-level fault self-healing is realized during disconnection, double fault scenes are covered, the tower footing module and the cabin module are interconnected through the double looped network, when any link or node fails, data can be transmitted through the other looped network, continuous operation of the wind generating set control system is ensured, distributed control is formed, and the control efficiency is improved. The functions are independent and can be flexibly expanded.

The invention belongs to the technical field of chip design, and particularly relates to a crossbar switch and application thereof in an on-chip double loop network. Comprising a control channel, and the control channel comprises a control virtual channel, a request arbitration module, an input port control module, an output port control module, a port state management module and a data selection module. The control virtual channel is responsible for receiving a request of a sending end; the request arbitration module adopts a fair rotation arbiter and is responsible for arbitrating a request for controlling a virtual channel; the input port control module is responsible for feeding back an arbitration result of the request arbitration module to the sending end and sending a data enable signal so as to control the sending end to send data to the crossbar switch matrix; the output port control module controls the data selection module to perform data path selection according to the arbitration result of the request arbitration module and the control information of the virtual channel; the data selection module is responsible for sending a data path selection result to the crossbar switch matrix; according to the invention, high-speed transmission of data is realized under the condition that the chip is small in area.

The invention discloses an active power distribution network reconstruction method and system considering a multi-stage loop grid structure, and the method comprises the steps: extracting all double-ring networks and single-ring networks in the multi-stage loop grid structure, and collecting the data needed by the network reconstruction calculation; taking the minimum load balance degree between feeder lines as an optimization target, taking the switch state of the power distribution network as an optimization variable, constructing a constraint condition of a power distribution network reconstruction process, determining a target function of network reconstruction of the active power distribution network, and obtaining a network reconstruction model; calculating active power distribution network load equivalent power; and according to the network reconstruction model and the load equivalent power of the active power distribution network, performing hierarchical network reconstruction on the double-ring network and the single-ring network by adopting an optimization algorithm to obtain a network reconstruction scheme of the active power distribution network. According to the method, for a multi-stage loop grid structure with complex topology, the misjudgment and misexecution conditions of a dispatcher are reduced, the power flow distribution and the load state of the multi-stage loop power distribution network are accurately described, and the calculation complexity is reduced through hierarchical optimization.

The invention discloses a data transmission method and device of a ship communication system based on a time sensitive network, and belongs to the technical field of ship communication, and the method comprises the steps: under the condition that a first ring network and a second ring network are normal, transmitting target service data through the first ring network and the second ring network according to a preset hot redundancy elimination protocol; and under the condition that the first ring network or the second ring network has the in-ring fault, activating a standby path of the ring network with the in-ring fault according to a multi-spanning tree protocol, and sending the target service data through the standby path of the ring network with the in-ring fault and the ring network without the fault according to a preset hot redundancy elimination protocol. According to the method, the double-ring network time-sensitive network is constructed, high-reliability data transmission is realized through the two redundant links, the data transmitted between the double rings are completely consistent based on the multi-spanning tree protocol and the hot redundancy elimination protocol, and the data transmission is not interrupted when a single link fails, so that the reliability of data transmission of the ship communication system is improved.

The invention relates to the technical field of power distribution network frames, and provides a layered power distribution network system, a building method and a cooperative load transfer control method.The layered power distribution network system comprises a trunk layer which comprises three or four switching stations, and all the switching stations included in the trunk layer are connected through cables to form a closed looped network structure; the total number of power supply paths of the closed looped network structure is two times of the number of the switching stations; the secondary trunk layer comprises a plurality of segments formed by dividing a power supply line, the segments are interconnected through a ring main unit, and the segments are respectively connected to different trunk layer switching stations to form a single-ring network or double-ring network structure; the user layer comprises a power distribution room, the power distribution room is provided with dual-power access equipment, the dual-power access equipment comprises a first access point and a second access point, the first access point is connected with the secondary layer ring main unit, and the second access point is connected with the main layer switching station. The method solves the problem that self-healing is difficult to implement under the conditions of shortage of transformer substation interval resources and limitation of line galleries.

The application provides a ring network cabinet distributed self-healing method and system for a 10kV double ring network, which is executed by a demarcation room DTU at a ring opening point at the end of a 10kV double ring network cable demarcation room. The method obtains a demarcation room bus voltage measurement value, a voltage measurement loop abnormal alarm information, a main inlet switch position signal and a main inlet interval fault remote signaling information, and generates a local criterion data set. The bus voltage loss, no PT disconnection or loop abnormal alarm and no overcurrent, zero sequence fault indication or protection alarm are checked in a preset criterion window. After the self-healing start criterion is met, a self-healing delay timer is started, and after the delay arrives, the main inlet switch is controlled to be tripped, and after it is confirmed that the main inlet switch is in the tripped position, the tie switch is controlled to be closed. The self-healing state information is generated based on the tie switch closed position confirmation result. The technical scheme of the application realizes the local fault isolation and power supply recovery at the ring opening point at the end of the demarcation room, and improves the action reliability of the ring network cabinet self-healing control.

The invention relates to the technical field of ship lift early warning, and discloses a full-process closed-loop ship lift multi-dimensional early warning system and early warning method.The full-process closed-loop ship lift multi-dimensional early warning system comprises a double-ring network redundancy communication module, a terminal mechanism precise detection module, a full-process stage self-inspection module, a double-ring layout visualization module, an anomaly grading judgment module and a multi-source signal linkage module; the double-ring network redundancy communication module constructs a double-ring structure to connect different substations, the terminal mechanism accurate detection module collects key mechanism state and parameter data, the whole-process-stage self-inspection module covers the whole stages of faults, starting, operation and shutdown, and the double-ring layout visualization module realizes abnormal linkage display through multiple areas. The anomaly grading judgment module distinguishes different anomaly types, and the multi-source signal linkage module achieves data synchronous transmission. All the modules interact through data interfaces to form a closed-loop monitoring link, and in combination with targeted anomaly judgment logic, full-process and multi-dimensional accurate monitoring and early warning of ship lift operation are achieved.

The present invention discloses a multi-channel substation integrated automation system, comprising an equipment layer, a communication layer, and a management layer. The microcomputer line protection and measurement and control device in the equipment layer encodes collected raw data into redundant data copies and adds camouflage information to the data frames. The data is then transmitted in parallel to the communication layer via four physical links. Four Ethernet switches in the communication layer form a dual-ring interconnection topology. A telecontrol communication management machine connects to two different switches in the dual-ring network via dual network ports. The management machine simulates a protocol interface using multiple camouflage modules. A load balancer distributes data based on priority, load, and link status. The core processing module verifies the data and uploads it to the management layer. The server, based on a Markov process link status prediction model and a Bayesian network data fusion engine, dynamically adjusts the data transmission strategy based on link failure rates and performs weighted fusion on multiple redundant data copies. This invention improves data transmission reliability and enhances network security protection capabilities.

The invention discloses a multi-channel substation integrated automation system which comprises an equipment layer, a communication layer and a management layer. A microcomputer line protection measurement and control device of the equipment layer encodes collected original data into redundant data copies and adds camouflage information in data frames, the redundant data copies are transmitted to the communication layer in parallel through four physical links, and four Ethernet switches of the communication layer form a double-ring interconnection topological structure. A telecontrol communication management machine is connected with two different switches in a double-loop network through double network ports, the management machine simulates a protocol interface through a multi-camouflage module, a load balancer distributes data according to priorities, loads and link states, a core processing module verifies the data and then uploads the data to a management layer, and the core processing module processes the data. And the server dynamically adjusts a data transmission strategy according to a link failure rate based on a link state prediction model of a Markov process and a data fusion engine of a Bayesian network, and performs weighted fusion on a plurality of redundant data copies. According to the invention, the reliability of data transmission is improved, and the network security protection capability is enhanced.

The invention discloses a substation main wiring system under an alternating current three-phase traction power supply system and an optimization method, and the system is characterized in that a plurality of cables are fed out from the secondary side of a main substation, are arranged in a triangle shape, and are respectively connected to the whole-line substation in a double-loop network form, a traction substation supplies power to a station power lighting load, meanwhile, two traction transformers are arranged, the wiring mode of the traction substation is a single-bus segmented mode, and the two traction transformers are arranged on two sections of buses respectively. The secondary side of the traction transformer is connected with the inlet wire switch cabinet through a cable, each traction substation is provided with two inlet wire switch cabinets, the inlet wire switch cabinet adopts a single bus segmentation form, and two outlet wires are arranged below a bus and are respectively connected with an uplink contact rail and a downlink contact rail.