143 results about "Primary station" patented technology

The invention discloses a safety control method and system for an emerging control main body, and belongs to the technical field of power system active control, and the method comprises the steps: carrying out the bidirectional data interaction through a master station AGC and a field station AGC, and carrying out the bidirectional data interaction based on a bidirectional data interaction result and a cooperative anti-error parameter; whether the emerging control main body is in a controllable state or not is judged in real time through collaborative security locking logic; if the control main body is in the controllable state, active measurement data of the emerging control main body are obtained, and jump detection and multi-source checking are carried out on the active measurement data; after verification is passed, a pre-control instruction is generated based on the control strategy, and reasonability verification and control effect simulation verification are carried out; and after the control effect simulation verification is passed, the pre-control instruction is taken as a final control instruction to be issued to the emerging control main body for execution. The method can greatly improve the safety control capability of AGC on an emerging control main body, guarantees the frequency operation safety of a power grid, and improves the safe and reliable power supply capability of the power grid.

The invention discloses a control method of an electricity utilization information acquisition terminal with security situation awareness, and relates to the technical field of electricity utilization information acquisition. Multi-source state evaluation, command risk division, rule decision and execution feedback are no longer independent functions through operation modes, joint security state levels, control quotas, command risk levels, command quota state marks and mutual reference between local execution consistency indexes and collaborative domain execution consistency indexes. A technical system with a close coupling relationship is formed in the electricity utilization information acquisition terminal, so that the method is not only suitable for resident courts, special transformer users and important user scenes, but also capable of automatically updating operation mode definitions, safety state division thresholds, control quota parameters and safety control rules through version comparison after main station side strategy update messages are issued. And the terminal security control capability is continuously evolved along with operation experience and strategy adjustment, and a strong synergistic effect is embodied.

The invention discloses an Internet of Things networking scheduling method for railway tunnel disaster prevention illumination and evacuation indication, and relates to the technical field of railway tunnel disaster prevention. Comprising the following steps: S1, tunnel end monitoring equipment actively initiates environmental channel detection through a power line carrier communication network, scans impedance characteristics, noise levels and attenuation characteristics of different line sections in a tunnel, establishes a dynamic channel fingerprint database, and records an optimal communication frequency point and a channel quality threshold; and S2, performing real-time linkage between the local center monitoring main station and a fire alarm system, and after receiving a fire alarm signal, immediately generating a dynamic evacuation path through a disaster evolution prediction model according to a fire alarm position, a smoke diffusion state and a real-time channel state. The power line carrier communication module is utilized to actively perform channel detection and electrical parameter acquisition, a state channel fingerprint database is established, and fault diagnosis and state grading are performed based on the state channel fingerprint database, so that the overall reliability and maintainability of the scheme are improved, and the availability of equipment in a disaster is ensured.

The application discloses a kind of ship's multiple propeller collaborative propulsion control method and system, it is related to ship automation control technical field.For by the control system of ship collaborative control multiple propeller to carry out ship propulsion, collaborative propulsion control method includes: obtaining the speed of ship, main station handle position and power station available power;Based on speed and main station handle position, identify the current navigation condition of ship;Based on the matching relationship of pre-set, obtain the operation mode matched with navigation condition;Based on navigation condition, operation mode and the switching control strategy between different navigation conditions of pre-set, available power of power station is distributed to multiple propeller, and the collaborative propulsion of ship is carried out.Such, by based on speed and main station handle position, identify navigation condition, and match operation mode, to distribute available power of power station to multiple propeller, improve the response speed of ship propulsion control, improve the adaptability to complex navigation environment, improve ship safety.

The application relates to the technical field of power distribution networks of power systems, and discloses a fault post-recovery control method for a power distribution network containing flexible soft switches, which comprises the following steps: after a fault occurs, the original main station converter is exited, the active power, the reactive power and the rated capacity of the remaining converters are collected to calculate the dynamic capacity margin, the electrical distance from each converter node to the load center of the system is calculated, the comprehensive score is obtained based on the capacity margin and the electrical distance weighting, the converter with the highest comprehensive score and the capacity margin greater than the preset threshold is selected as the new main station, and the control mode of the new main station is switched; the main station selection mechanism based on the comprehensive evaluation of the dynamic capacity margin and the electrical distance is used to quickly establish a stable voltage frequency reference for the power failure area, the load shedding penalty sub-target and the load hierarchical and phased recovery strategy are used to preferentially guarantee uninterrupted power supply for the first important load under the condition that the transfer supply capacity is limited, and the influence of power failure on sensitive users is effectively reduced.

The application discloses an implementation method suitable for a high-throughput satellite communication hybrid duplex system, which acquires double-network statistical basic data containing end station round-trip propagation delay distribution and phased array antenna transmission-reception switching characteristics; constructs a dual-coupling time planning mathematical model with original network and mirror network time window start and end time as optimization variables, and solves optimal time parameters under the conditions of satisfying physical constraints such as delay reachability, antenna switching safety and main station reception zero overlap; and the main station broadcasts time slot configuration instructions to cooperatively control all network end stations to perform hybrid duplex transmission-reception. The application also introduces a closed-loop feedback mechanism based on end station local observation, estimates delay drift by using network clock reference information, and corrects model input. The application realizes zero conflict hybrid duplex communication under complex physical constraints by converting static configuration into dynamic mathematical optimization solution, and improves satellite spectrum resource utilization rate and system operation stability.

The invention discloses a wide area measurement system abnormal data identification method, system and related device, and the method comprises the steps: carrying out the single electrical interval data abnormity identification of a single PMU at a plant station end, and obtaining a first abnormal data identification result; according to the first abnormal data identification result, when a certain measurement data in a single electrical interval is abnormal, comparing and identifying data anomalies of a plurality of PMUs at a plant-station end to obtain a second abnormal data identification result; if the same PMU is accessed to a plurality of electrical intervals on the same bus, performing wide-area level correlation comparison analysis on wide-area measurement system data at a master station end, and performing wide-area measurement system abnormal data identification through a power grid topology connection relation to obtain a third abnormal data identification result; and integrating the obtained abnormal data identification result, and obtaining an abnormal data identification result of the wide-area measurement system through collaborative analysis of a main station and a plant station. According to the method, the identification accuracy of the WAMS abnormal data is improved, and the work of diagnostic analysis of a master station is reduced.

The application discloses an improved method, system and medium for improving the reliability of wireless communication of a power distribution terminal. The method comprises: stopping the main station from sending services such as total calling, time, heartbeat, request link state and link test during remote control operation, and resuming the process after the remote control process is completed; adding remote control conditions for local discrimination by the power distribution terminal; extending the discrimination duration of communication timeout; and sending burst remote signaling and burst remote measurement messages occurring within a cycle time by separate packaging in units of cycle time, thereby improving information transmission efficiency. The application is dedicated to low signal areas and is compatible with IEC60870-101 protocol, and solves the low remote control success rate caused by hardware problems by using software modification; the terminal discriminates remote control conditions when the main station performs remote control operation, and effectively solves the remote control failure problem by adding a put-off constant value.

The invention relates to the technical field of power utilization acquisition efficiency improvement, in particular to a power utilization acquisition efficiency improvement method based on dual-mode and broadband carrier communication, which comprises the following steps of: S1, acquiring multi-dimensional characteristic parameters in power line carrier communication, and preprocessing to output a characteristic set; s2, adopting an LSTM + Transform hybrid model to predict a channel quality change trend in the future 5-15 minutes according to the feature set, and outputting a prediction result; when the method is used, channel quality changes are predicted through deep learning, prospective parameter adjustment is achieved, and communication risks caused by passive adaptation are avoided; based on multi-factor collaborative decision-making of edge intelligence, multiple influence factors are comprehensively considered, and optimal communication mode selection is facilitated; dependence on a master station is reduced through local decision making of the edge nodes, and the response speed and the real-time performance can be improved; the technical bottlenecks of untimely dual-mode switching and uneven load distribution in the prior art are solved, and the adaptability and transmission efficiency of dual-mode communication are improved.

IO-Link master (20) having at least one IO-Link port (21) configured to be connected to an IO-Link port transceiver (11) of an interface (10) having an IO-Link port transceiver (11), at least one wireless transceiver (12, 12a, 12b) and a signal processing device (13) configured to provide a network between the IO-Link port transceiver (11) and the at least one wireless transceiver (12, 12a, 12b), characterized in that the IO-Link master (20) has a signal processing device (23) configured to provide a network between the interface (10) and IO-Link devices (40) connected to further IO-Link ports (22) of the IO-Link master (20).

The invention discloses an intelligent substation gateway machine service orchestration method and system. The method comprises the following steps: registering service instances of each node of a gateway machine, a monitoring host and a comprehensive application host in an intelligent substation into a gateway machine service pool and dynamically updating the service instances; when the master station sends a service request to the gateway machine, a dynamic service calling chain is formed according to service priorities, and service instances of the service calling chain are distributed to corresponding target execution nodes according to the priorities so as to execute services in combination with the monitoring host and the comprehensive application host; in the process of executing the service by the node, the node operation state and the service execution state are continuously monitored, and when the service execution is abnormal or interrupted, the service request is distributed to other nodes to realize quick service transfer or service termination. According to the method, dynamic discovery and registration of substation services, service scheduling based on resource optimization and timely migration of nodes during service faults can be realized, and technical support is provided for a scheduling master station to efficiently and reliably access station end data and functions.

The invention discloses a system and a method for testing current transformers among transformer substations. The system comprises a mobile master station unit, a plurality of field data acquisition units and a portable standard current transformer. All the units are synchronized to coordinated world time through a global navigation satellite system; the mobile master station unit sets future absolute trigger time, and realizes synchronous acquisition of secondary signals of the current transformer to be detected and the portable standard current transformer by multi-station hardware; based on a standard truth value obtained by a main station self-monitoring loop, amplitude correction factor and phase correction calculation is carried out on each substation signal, and error compensation is completed; furthermore, high-precision and traceable ratio error and angle error results are output through frequency adaptive interception, windowing interpolation spectrum analysis and uncertainty evaluation. According to the invention, power failure is not needed, synchronous, high-precision and traceable comparison of multi-station current transformers can be realized in a wide area range, and the reliability of a power grid metering and protection system is improved.

The communication method executed by the communication station (100) is a communication method executed by the communication station (100) of a network system including a plurality of communication stations (100) that perform communication connections, and includes a calculation step of calculating the sum of a value obtained by multiplying the value of the transmission period of an Announce frame including information indicating the priority of the communication station (100) in the network system by a value obtained by subtracting 1 from the number of communication stations (100) included in the network system, and the value of the transmission period of a Sync frame including time information indicating the time held by the communication station (100), as a synchronization completion time required for the communication station (100) to synchronize with the time indicated by time information distributed from a grandmaster station selected from the plurality of communication stations (100) from the start of the communication station (100).

A communication method and a communication device, the method comprising: a first communication device sends first adding request information to a second communication device, the second communication device being an auxiliary station providing services for a terminal device; receiving first addition request confirmation information of the second communication device; receiving a master station key corresponding to a candidate master cell group configuration of the first communication device after receiving the first add request acknowledgement information; after receiving the master station key, the first secondary station key is transmitted to the second communication device according to the master station key. When the service master station of the terminal equipment is switched to the first communication device and the second communication device is kept, the second communication device can timely and accurately obtain the auxiliary station key under the condition that the first communication device provides service for the terminal equipment, so that the switched terminal equipment is ensured to still use a DC architecture, and the user experience is improved. High-speed data transmission is maintained, and the user experience is ensured.

The utility model relates to a double loop network safety communication door opening and closing control device of a platform door control system, which comprises a platform door controller PEDC and a plurality of door control units DCU, and takes the platform door controller PEDC as an EtherCAT main station. The door control units DCU serve as EtherCAT slave stations to form an EtherCAT network, and communication is conducted between the platform door controller PEDC and the multiple door control units DCU through an FSOE safety communication protocol. The platform door controller PEDC comprises a PEDC A system and a PEDC B system, each door control unit DCU comprises a first processor and a second processor, the PEDC A system and the first processors of the plurality of door control units DCU form a first communication topological structure, the PEDC B system and the second processors of the plurality of door control units DCU form a second communication topological structure, and the first communication topological structure and the second communication topological structure form a second communication topological structure. The first communication topological structure and the second communication topological structure are independent of each other. According to the utility model, safe and reliable communication between the platform door controller PEDC and the plurality of door control units DCU is realized.

A computer system includes a primary site having a primary volume, and having an instance that performs data processing related to input / output data, and a secondary site having a secondary volume, and having an instance. Remote copy is set up between the primary and secondary volumes, and the instance of the primary site transfers data input to or outputted from the primary volume to the secondary site, while the instance of the secondary site stores the transferred data in the secondary volume. The computer system further includes a specifications changing section that changes specifications of the instance of the secondary site when a failover switching process of switching a performer of the data processing from the primary to secondary site is performed, or when a failback switching process of switching the performer of the data processing from the secondary to primary site after the failover switching process is performed.

The invention provides an online nuclear power electric quantity report recovery method, an online nuclear power electric quantity report recovery system and a computer program product, which are suitable for the technical field of nuclear power electric energy management. Enabling the computer equipment to read load curve data stored in the electric energy meter through the special inductive probe, and enabling the computer equipment to obtain target historical data corresponding to the data defect time period of the electric quantity from the load curve data; the master station system can recover the online nuclear power electric quantity report based on target historical data; according to the method, the recovered ammeter data can be ensured to be accurate by using the preset time synchronization mechanism and the load curve data stored in the ammeter, so that the accuracy of the regenerated electric quantity report is ensured; therefore, the problem of data loss or abnormity caused by the acquisition device or communication fault in the nuclear power station networked electric energy charging system is solved, and the reliability and stability of the master station system are improved.

The utility model relates to cable fault early warning positioning technical field, and disclose a kind of high voltage cable whole life cycle fault early warning positioning device, the high voltage cable whole life cycle fault early warning positioning device, including system main station screen cabinet and the cable body to be monitored.The high voltage cable whole life cycle fault early warning positioning device, to realize the on-line monitoring of high voltage cable whole life cycle, guarantee the safe and stable operation of power system, by being provided with system main station screen cabinet, intelligent integrated management unit, voltage travelling wave acquisition unit, current travelling wave acquisition unit, circulating current acquisition unit, cable partial discharge acquisition unit, current travelling wave sensor, grounding circulating current sensor and high-frequency current sensor, to collect the transient state travelling wave and steady component of cable operation process, it is analyzed and handled, predicts operating condition, and provides alarm and fault diagnosis information to fault cable, the insulation state of cable is monitored, permanent fault is early warned.

The application discloses a kind of load management terminal safe and reliable fusion communication method, and disclosed with the system of load management terminal safe and reliable fusion communication method, wherein load management terminal safe and reliable fusion communication method is converted into feature gene by the intrusion detection data set, and immune cell is generated by gene, the diversity of feature information is improved by cloning variation, to match abnormal data to prevent the possibility of intruder intrusion, also provide synergistic stimulation, further improve the accuracy of system.In addition, adaptive authentication mechanism is also introduced between terminal and main station, through the evaluation of context data, adaptive access authentication strategy arrangement is carried out, and time stamp, digital signature and NTRU encryption system are introduced in communication process, can cope with replay attack, verify the integrity of data, identity authentication and anti-denial, and have the ability of anti-quantum, face mass load management terminal, realize efficient and safe access communication strategy.

This invention belongs to the field of distribution network relay protection technology, and particularly relates to a method for improving the accuracy of relay protection devices in medium-voltage distribution networks containing photovoltaic (PV) power sources. The invention includes: determining the location where distributed PV power sources are connected to the medium-voltage distribution network, and configuring a deeply integrated primary and secondary pole-mounted circuit breaker at the point of common coupling (PCC); co-commissioning the PCC-configured PCC-configured circuit breaker with the main substation; and configuring setting parameters for each relay protection device on the grid according to the location of the distributed PV power source connected to the medium-voltage distribution network. This invention addresses the increasing number and capacity of distributed PV power sources connected to medium-voltage distribution networks, effectively improving the accuracy of relay protection at all levels of the medium-voltage distribution network, ensuring accurate operation of the distribution network during faults, and significantly improving the reliability of the distribution network.

The application provides an end station access method, a main station, an end station and a storage medium, and the end station access method comprises the following steps: determining that an access mode is a first access mode, the access mode further comprising a second access mode, and the resource proportion of an access time slot corresponding to the first access mode being greater than the resource proportion of an access time slot corresponding to the second access mode; the end station accesses the main station through an access time slot configured by the first access mode to obtain target satellite position information and sends the target satellite position information to the main station, so that the main station switches the access mode to the second access mode, and the end station accesses the main station according to an access time slot configured by the second access mode. According to the scheme provided by the embodiment of the application, the target satellite position information can be calculated after the end station accesses the main station, and since the accuracy of the target satellite position information is high, the access can be completed with fewer access time slots, so that the resource proportion of a service time slot is increased, and the service transmission capacity of the satellite communication system is improved.

The invention relates to a self-adaptive topology real-time updating method and a self-adaptive topology real-time updating system for dealing with a fault sequence of opening and closing signals of a spare power automatic switching device of a power distribution station house. The method comprises the following steps: S1, switch marking: accurately marking switches related to spare power automatic switching in a power distribution master station system; s2, performing switching identification: maintaining the switching state of the spare power automatic switching device in the power distribution master station system; step S3, signal identification: when the power distribution main station receives the switch signal, automatically judging whether the switch is a spare power automatic switching switch, and identifying the current switching state of a spare power automatic switching device; and S4, topology updating: based on a judgment result of the step S3, a differentiation strategy is adopted to update the distribution line topology. According to the method, the problem of wrong sequence of the spare power automatic switching-on and switching-off signals can be intelligently solved, the real-time and accurate updating of the line topology at the power distribution main station side is realized, and the reliable and correct action of a centralized feeder automation system is ensured.

The invention discloses a full-loop segmented power distribution terminal acceptance method, system and device, a medium and a product, and the method comprises the steps: obtaining the design information of a power distribution terminal, detecting whether the power distribution terminal is qualified, and obtaining a design verification result; through master station operation of the power distribution terminal, the action sequence and logic are verified, and a switch state signal is detected, so that a full-loop segmentation model is constructed; performing communication verification on the full-loop segmentation model and a master station to obtain a data stability verification result; verifying the working stability of the power distribution terminal by simulating an alternating current power supply to obtain a compatibility safety verification result; a comprehensive test result is determined by performing fault simulation on the power distribution terminal and modifying a constant value of the remote terminal; and according to the design verification result, the data stability verification result, the compatibility security verification result and the comprehensive test result, determining an acceptance result of the power distribution terminal. And through multi-dimensional omnibearing verification from drawing design to actual operation, the reliability and safety of the terminal after commissioning are guaranteed to the maximum extent.

A kind of power distribution area topology relationship identification system and method of different frequency small current injection, signal sending device is arranged in each terminal of power distribution area, integrated sending and receiving device is arranged in each node, signal receiving device is arranged at the side of distribution transformer;Signal sending device injects different frequency small current signal into power distribution network according to the starting instruction of main station system;Integrated sending and receiving device, i.e. the function of signal sending device and signal receiving device is integrated;Signal receiving device identifies and restores different frequency small current signal, and sends its related information to main station;Main station system determines the next level of signal sending device by comprehensively identifying the related information of signal, and obtains complete topology relationship by combing each level according to the method.The present application has the advantages of strong anti-interference ability, high identification success rate, adjustable identification frequency according to current frequency, low dependence on injected current intensity, strong practicability and the like.

The invention relates to a metering data transmission method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring load information of a first communication link under the condition that a plant station side and a main station side in a power grid perform metering data transmission through the first communication link and a second communication link; under the condition that the load information of the first communication link meets a pre-switching triggering condition, switching target flow in the first communication link to a second communication link so as to transmit metering data through the first communication link and the second communication link; acquiring heartbeat information returned by the first communication link; and under the condition that the heartbeat information meets the fault switching condition, switching the residual flow except the target flow in the first communication link to the second communication link so as to transmit the metering data through the second communication link, thereby ensuring that the metering data is not lost and the service is not interrupted, and effectively improving the reliability of power grid metering data transmission.

The application provides an electronic tag issuing method, a main station server, an upper computer, a card issuer and a system, and relates to the technical field of wireless communication. The method comprises the following steps: after the upper computer and the main station server perform a handshake operation, a session key is generated; the main station server generates a plaintext key of an electronic tag through a password machine, encrypts the plaintext key through the session key to obtain plaintext key ciphertext, and encrypts application data of the electronic tag through the plaintext key ciphertext to obtain application data ciphertext; the upper computer encrypts the session key through a protection key to obtain session key ciphertext, and sends the session key ciphertext, the plaintext key ciphertext and the application data ciphertext to the card issuer; the card issuer decrypts the session key ciphertext through the protection key to obtain the session key, decrypts the plaintext key ciphertext and the application data ciphertext through the session key, and writes the decrypted plaintext key and the application data into the electronic tag. The application effectively guarantees the data security of electronic tag issuing.

This invention provides a method and system for rapid short-circuit current identification and alarm for feeder terminals, relating to the field of cable line monitoring technology. The method includes: real-time acquisition of instantaneous sampled data of the feeder current, calculation of the current amplitude change rate, phasor extraction, calculation of the current phase value, construction of a phase transient characteristic quantity using the phase difference of continuous time sampling points, coupling analysis of the first-order amplitude change quantity and the phase transient characteristic quantity to construct a short-circuit characteristic coupling indicator, triggering an abnormal reporting command for a short-circuit event when the short-circuit characteristic coupling indicator exceeds a preset coupling threshold, determining the rapid alarm level of the short-circuit event based on the trigger time and the duration of the phase transient characteristic quantity, and issuing alarm information to the main station. This solves the technical problem of low accuracy and reliability in short-circuit current identification of feeder terminals in existing technologies. It achieves rapid identification and alarm of short-circuit current events in feeder terminals while improving the accuracy and reliability of the identification.

The application discloses a kind of substation monitoring information automatic acceptance analysis method, including following acceptance analysis steps: S1, respectively with analog main station, synchronous parallel simulation system, data communication gateway and substation monitoring background connection of automatic acceptance system;S2, complete the normative check of data communication gateway configuration file;S3, SCD file is retrieved and is checked SCL model;S4, complete the consistency check of monitoring background database file and interval layer equipment model;S5, complete the consistency check of monitoring background database / monitoring background picture and interval layer equipment communication;S6, complete the consistency check of data communication gateway and interval layer equipment model;S7, complete the real-time communication consistency check of gateway;S8, complete the information joint debugging check between main station and plant station;S9, according to each check result generates acceptance analysis report and archives, completes acceptance;The application can automatically check substation monitoring information, improve acceptance work efficiency.

The invention relates to the technical field of power distribution network Internet of Things terminal modeling, and discloses a power distribution network one-transmitting double-receiving Internet of Things terminal modeling method, which comprises the following steps: step 1, determining modeling boundaries and core elements, and determining division and data interaction ranges of real-time core and management core function modules; the core elements comprise operation, operation and maintenance, security isolation, master station interaction, distributed energy access and topological association data, and the priority, acquisition frequency and precision of each element are determined. A real-time core and management core dual-core architecture is creatively adopted, the function boundary and data interaction range of the two cores are clearly divided, the real-time core focuses on high-precision acquisition, rapid processing and regulation and control instruction response of operation data of power distribution equipment, and the management core focuses on comprehensive management and multi-dimensional analysis of operation and maintenance data and interaction adaptation with a master station. The delay problem caused by data mixing processing in a traditional single-core model is effectively avoided.

The invention relates to the technical field of communication network and power system dispatching, in particular to a data network operation risk identification method, which comprises the following steps of: S1, identifying and classifying communication endpoint equipment to be analyzed, and determining a starting point and an ending point of routing analysis; s2, analyzing possible physical link channels between endpoints and the number of forwarding nodes based on a network topology link table; s3, inquiring a private network VPN routing table, a public network routing table and interface ledger information step by step by taking the master station equipment as a starting point and the plant station equipment as an end point, and splicing to form a forward full-link routing forwarding path; according to the invention, through links of endpoint equipment identification, physical link reasoning, routing path step-by-step splicing, bidirectional path comparison, risk identification analysis and the like, full-link visualization and dynamic monitoring from a service communication starting point to an end point are realized.