13 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 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 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 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 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.