853 results about "Supply and distribution" patented technology

The invention relates to the technical field of tunnel power supply and distribution, in particular to a tunnel modular prefabricated cabin power supply and distribution intelligent substation self-adaptive regulation and control system based on edge calculation. Comprising an edge calculation and AI decision-making unit which is used for realizing rapid acquisition, processing and instant decision-making of tunnel power supply and distribution multi-dimensional data, generating a power supply and distribution adaptive regulation and control strategy by deploying calculation resources and a machine learning algorithm at edge nodes close to a data source, and converting the strategy into an executable regulation and control instruction; a cloud platform collaborative management unit; and an intelligent sensing and internet-of-things unit. According to the invention, hierarchical decision control of the tunnel power supply and distribution system is realized by constructing a hybrid architecture of edge computing and cloud platform collaboration and a priority judgment mechanism; according to the invention, multi-modal data are integrated through the multi-protocol communication link module and the full-scene data fusion analysis module, and data association analysis is realized through Kalman filtering, D-S evidence theory and other algorithms.

The invention discloses a power supply and distribution method and system based on multi-modal data fusion and adaptive control, and the method comprises the steps: collecting real-time power supply and distribution data in a power supply and distribution network node, and obtaining power supply and distribution environment data; fusing the real-time power supply and distribution data and the power supply and distribution environment data by using a quantum heuristic multi-modal fusion algorithm to obtain fused power supply and distribution data; establishing an LSTM-CNN machine learning model based on the LSTM long and short term memory network and the CNN; inputting the fused power supply and distribution data into an LSTM-CNN machine learning model for training to obtain electric load prediction data; and based on the adaptive control strategy, sending a regulation and control instruction to the electric load equipment according to the electric load prediction data. And voltage fluctuation, flicker and harmonic distortion are effectively suppressed through real-time dynamic regulation and control, and voltage deviation and power factors of a user terminal are guaranteed to be optimal.

The invention relates to an intelligent monitoring method and system based on a power supply and distribution system, and relates to the technical field of power grid monitoring. Establishing a detection interval and determining an interval change parameter; determining an interval change combination according to all the interval change parameters; establishing a historical interval, randomly delimiting a comparison interval of which the width is the detection duration in the historical interval, and determining a comparison change combination in each comparison interval; determining a combination similarity value according to the interval change combination and the comparison change combination, determining the combination similarity value with the maximum value according to a sorting rule, and defining a comparison interval corresponding to the combination similarity value as a similar interval; establishing a prediction interval according to the similar interval, and defining the detection electric power parameter in the prediction interval as a prediction electric power parameter; and outputting an aging early warning signal when the predicted electric power parameter is greater than the preset early warning electric power parameter. The application has the effect of improving the overall operation effect of the power supply and distribution system.

The invention discloses a self-adaptive switching system and method for power supply and distribution, and the system comprises a data collection module, an analysis module, a modeling module, a decision module, an execution module and an early warning module, and the data collection module generates a real-time monitoring signal; the analysis module performs dynamic weighted evaluation according to the real-time monitoring signal and generates an evaluation signal; the modeling module constructs a virtual model of the power supply system and generates an analog signal; the decision signal generates a control signal containing a path selection instruction; the execution module controls the semiconductor device to switch the physical connection state of the power supply according to the control signal and generates a switch feedback signal; and the early warning module forms an equipment health assessment result according to the switch feedback signal and an abnormal arc signal when the execution module switches the connection state and transmits the result to the decision module. The self-adaptive switching system for power supply and distribution can solve the problem that a traditional power supply and distribution switching system depends on a single threshold to judge the state of a power supply and cannot comprehensively evaluate the quality of electric energy.

The invention relates to a network topology dynamic optimization method and equipment for large-scale power supply and distribution equipment networking. The method comprises the following steps: step S101, real-time data acquisition and state sensing; step S102, carrying out network topology modeling and performance evaluation; step S103, dynamic risk assessment and optimization target generation; s104, carrying out topological optimization decision making based on a feasibility maintenance type genetic algorithm; step S105, carrying out optimal strategy verification and seamless switching; selecting an optimal network topology reconstruction scheme from the Pareto optimal solution set according to a preset decision strategy; and after the reconstruction scheme is verified on a control level, generating an equipment cascade and open circuit control instruction sequence, and guiding related nodes to complete undisturbed switching of the network topology in a preset time window through a distributed cooperative control mechanism. According to the method, generation of invalid solutions can be avoided, and the convergence efficiency of a large-scale network topology optimization algorithm is remarkably improved.

The invention relates to the technical field of railway power supply and distribution, particularly provides an operation and maintenance management method and system for railway power supply and distribution, and is used for solving the problem of low operation and maintenance management efficiency caused by poor accuracy of fault identification and positioning. The method comprises the following steps: receiving equipment operation data of a railway power supply and distribution system collected by a sensor network through the Internet of Things; inputting the data into a pre-trained graph neural network model, and identifying a fault equipment identifier and a fault mode; determining a target fault propagation path according to the fault equipment identifier, the fault mode and the multi-level power supply and distribution knowledge graph; wherein the multi-level power supply and distribution mapping knowledge domain comprises an equipment level mapping knowledge domain, a region level mapping knowledge domain and a system level mapping knowledge domain which are associated with one another; according to the target fault propagation path, a fault severity evaluation model is adopted to predict the fault severity, a corresponding operation and maintenance management report is determined, and corresponding processing is carried out according to the operation and maintenance management report. According to the technical scheme provided by the invention, the operation and maintenance management efficiency is improved.

The invention provides a comprehensive test bench for an aircraft system, and relates to the technical field of equipment testing. Platform function support is provided through the simulation flight system, the comprehensive control and test auxiliary system, the data acquisition analysis system, the software test system, the airborne system integration module and the fault injection system. Through a platform I / O resource pool, a simulation power supply and distribution system, a test network, a reflection memory network and a wiring and tandem system, different aircraft system test benches are cooperated to carry out a linkage comprehensive experiment. According to the invention, the building of the aircraft system comprehensive test bench is realized among the power device system test bench, the atmospheric inertial navigation system test bench, the passenger cabin information system test bench, the copper bird test bench and the iron bird test bench, so that the linkage test operation requirement is met.

A fault diagnosis method for a power supply and distribution system of a data center comprises the following steps that the actual temperature and the real-time load current of a target line are collected, and the single-hour average temperature and the single-hour average load current of the target line are calculated; calculating a single-hour standard temperature difference of the target line, calculating a temperature-electricity ratio of the target line, calculating a daily temperature-electricity ratio difference rate of two adjacent days, carrying out fault analysis, and comparing the daily temperature-electricity ratio difference rate with a difference threshold value. In the embodiment of the invention, according to the characteristic of the cumulative effect of the temperature, the temperature is taken as the main criterion, and the instantaneous physical parameters during the operation of the equipment are combined, so that the judgment on whether the equipment has the fault abnormity is realized, and before the irreversible fault occurs, the precursor early warning is provided for the operation and maintenance personnel, and the operation and maintenance personnel can be helped to deal with the fault as early as possible and as fast as possible. Reliability of power supply and distribution system operation is ensured.

The invention relates to an airflow jet heat dissipation, dehumidification and dust removal system of a power device, and belongs to the technical field of power supply and distribution. Comprising an electric power device and a protection box body of the electric power device, the electric power device is arranged in the protection box body, at least one airflow ejector is installed in the protection box body, an air outlet nozzle of a jet flow nozzle of the airflow ejector corresponds to the surface of the electric power device, and the jet flow nozzle is in a wedge shape. Jet air generated by the airflow ejector efficiently and uniformly performs heat dissipation, dehumidification and dust removal on the electric power device, so that the purposes of saving air consumption, reducing energy consumption, preventing electric leakage and short circuit of electric appliances, reducing power loss, prolonging the service life of the electric power device and improving the safety and operation stability of the electric power device are achieved.

The embodiment of the invention provides a satellite constellation system and a communication control method, the system comprises a plurality of load satellites which are in inter-satellite communication connection, and each load satellite comprises a comprehensive electronic subsystem, a communication navigation subsystem, an attitude and orbit control subsystem and a power supply and distribution subsystem. During an on-orbit task, a spaceborne computer of the comprehensive electronic subsystem can obtain information of a current task stage, calculates communication target parameters according to a communication mode corresponding to the current task stage, and generates an attitude adjustment instruction based on communication attitude parameters corresponding to the communication target parameters; and controlling the attitude and orbit control subsystem to adjust the inter-satellite communication module and / or the ground communication module to a communication attitude associated with the azimuth information. According to the system, data processing and communication processes can be dispersed to a plurality of load satellites through inter-satellite communication, and the communication attitude requirement of the inter-satellite communication process is automatically adapted, so that the problem of low timeliness of the satellite system data processing and communication processes is solved.

The invention discloses a coordination control method for energy storage and a flexible multi-state switch in a power distribution network system, and relates to the field of power supply and distribution. The hierarchical control mode is adopted to coordinate the energy storage system and the flexible multi-state switch; the coordination control layer performs working mode selection and switching in a networking operation mode by a centralized controller according to the feeder load power, the charge state of a storage battery, the operation state of each transformer and the position and the number of feeder faults; the control strategy of the flexible multi-state switch can be changed among a constant DC voltage control strategy, a constant power control strategy and a droop control strategy; the control strategy of the storage battery can be switched among constant-current charging control, floating charging control and constant-voltage control; and the feeder load in the equipment control layer can also realize a load switching control strategy. By adopting the coordination control method, the power supply reliability and the power quality of the system can be improved.

The invention provides a high-voltage power supply and distribution system for an electric vertical take-off and landing aircraft, and belongs to the technical field of power supply and distribution regulation control systems, and the system comprises a main bus bar module which is used for the current collection and distribution of an energy storage battery and a ground DC bus high-voltage power supply, and is provided with a fuse for overload cut-off; the output bus bar module comprises six mutually-independent motor load output channels and two mutually-independent high-voltage output channels, and each motor load output channel supplies power to the two symmetrically-arranged motors at the same time and is used for distributing 12 motor loads and 2 high-voltage output loads; the power-on buffer module is used for power-on buffer of 12 paths of motor loads and restraining power-on impact current; the self-locking control module has a motor load output control self-locking function, and can keep normal output of motor load current under the condition that the monitoring unit fails; and the monitoring unit module is used for monitoring the input voltage, the output voltage and the load current, and performing power-on buffer control and high-voltage contactor self-locking control on the motor load.

The invention belongs to the technical field of on-satellite intelligent information processing power supply and distribution, and discloses a power supply and distribution system of an on-satellite real-time information processing system. The system is composed of a short circuit protection circuit (10), a surge suppression circuit (20), a satellite real-time processing system switching circuit (30) based on a magnetic latching relay, an EMI filter (40), a DC-DC power supply module (50), a relay-based power supply and distribution switching circuit (60), a DC-DC power supply module (70) and a DC-DC power supply module (80). According to the invention, the power supply problem of any dynamic redundancy unit in the satellite real-time information processing system is solved, and the sneak path problem caused by misoperation in the use process is avoided.

The invention discloses a power supply and distribution control system based on a virtual power plant, and relates to the technical field of power distribution systems. The system comprises five core modules: a digital twin simulation control closed loop module constructs a complete closed loop of data acquisition, simulation calculation, control execution and model iteration, and realizes real-time synchronization of a physical system and a digital mirror image and accurate issuing of a control instruction; the multi-agent source-load-storage optimization module improves the source-load-storage collaborative scheduling efficiency through distributed agent collection and reinforcement learning; the multi-scene energy storage adaptive control module generates a scene-based energy storage strategy based on meteorological, load and electricity price multi-dimensional perception and model prediction control; and the multi-type energy storage ratio linkage module realizes multi-type energy storage cooperative operation based on an energy storage characteristic database and scenarized weight optimization. All the modules work cooperatively, the system response speed, the control precision and the power supply stability are effectively improved, and the system is suitable for industrial parks and other complex power supply and distribution scenes.

The invention discloses a liquid hydrogen fuel energy power system and an airplane, and belongs to the technical field of liquid hydrogen airplane power device system integration. The system comprises a liquid hydrogen tank, a liquid hydrogen pipeline, a gas hydrogen pipeline, a heat conduction liquid circulation pipeline, an air pipeline, a hydrogen turbine engine power device, a fuel cell, a heating device, a primary heat exchanger, a secondary heat exchanger, a starter and an airborne power supply and distribution network. The system absorbs waste heat of a fuel cell and exhaust waste heat of an engine exhaust nozzle, liquid-gas-hydrogen conversion is achieved, and the problem of vaporization of liquid hydrogen fuel on a machine is effectively solved. Pressurized air is provided for the fuel cell through air entraining of an engine air compressor, waste heat of the fuel cell is absorbed through a first-stage heat exchanger, and the air side supply and heat dissipation functions of the fuel cell are achieved. According to the two-stage heat exchange device, fuel vaporization heating with different hydrogen fuel flow supply requirements is achieved according to the starting and stable operation processes, the system starting method solves the system starting heat source problem, and combined starting of the main power device and the auxiliary power device is achieved.

The embodiment of the invention discloses a power distribution network line loss clustering characteristic analysis and anomaly identification method, and relates to the technical field of power supply and distribution system operation and maintenance. The method comprises the following steps: collecting multi-time-period line loss data of a power distribution network line, and constructing a line loss calculation model; zero mean value unit variance standardization processing is adopted to balance each feature so as to avoid the situation that the clustering process is dominated due to the fact that the factor value range of some features (such as current) is large. Initial clustering center selection is carried out by introducing a periodic oscillation mutation strategy and a good point set principle, and the rationality and clustering effect of an initial clustering result are optimized. In the clustering center optimization process, dynamic adjustment is carried out in combination with an improved snow ablation algorithm, so that the convergence and accuracy of the algorithm are improved. And researching the dynamic change and distribution rule of the line loss data in time and space dimensions through space-time analysis, and carrying out anomaly identification on the line loss data based on a clustering result.

The invention relates to the technical field of power electronics and power supply and distribution, and discloses a data center AC / DC power distribution system input and output voltage and current monitoring method, which comprises the following steps: deploying an intelligent sensing unit with edge computing capability at each monitoring node, sampling according to a basic frequency, and extracting effective values, harmonic distortion rates, differential change rates and other characteristics of voltage and current in real time; judging that the system is in a steady state, a quasi transient state or a strong transient state according to the multi-stage dynamic threshold value, and respectively executing feature abstract uploading, local high-frequency backtracking or collaborative full-waveform synchronous acquisition; and the central server classifies and stores the data, constructs a state evolution model, and dynamically optimizes threshold parameters. The system comprises an intelligent sensing unit, a central monitoring server and an industrial Ethernet link. According to the method, the steady-state data transmission quantity is remarkably reduced, transient details are completely captured, and adaptive adjustment of the monitoring sensitivity is realized.

The invention relates to the technical field of intelligent remote control, and discloses a multi-machine collaborative management and control method for coal mine fully-mechanized excavation, fully-mechanized mining, main transportation, auxiliary transportation, production assistance, power supply and distribution and other fixed scenes, and the method comprises the following steps: S1, system architecture design: constructing a multi-machine collaborative management and control system, by means of a special multi-element sensing and control module configured for each equipment unit in a fixed scene, a central control system serves as a coordination center, and autonomous operation is achieved by means of an edge computing center control module of the central control system under the condition of communication interruption or delay; s2, real-time sensing and data fusion: integrating deployed sensors in existing equipment, and collecting equipment operation condition states and environment information; a self-learning function and a distributed data storage mechanism are introduced into the edge computing device, so that self-adjustment and optimization of each device in a complex coal mine environment are realized, local data sharing and self-adaptive control can still be realized even under the condition of communication interruption or delay, and continuity and safety of operation are ensured.

The invention belongs to the technical field of power supply and distribution, and particularly relates to a hydrogen-lithium hybrid power supply multi-mode uninterruptible power supply system, a control method and a storage medium, and the system comprises a hydrogen energy power supply vehicle, a lithium battery energy storage unit, a power conversion subsystem PCS, a voltage phase tracking module, a static change-over switch STS and a control unit. According to the invention, through cooperative work of the lithium battery and the hydrogen fuel cell, millisecond-level rapid switching during commercial power failure is realized, continuity of load power supply is ensured, and the problem of starting delay of a traditional hydrogen energy system is solved. Intelligent cooperative control of hydrogen energy and lithium batteries is realized according to different scenes, energy distribution is optimized, and the operation efficiency and stability of the system are improved. The control unit monitors the operation state of each part of the system in real time, calculates the dynamic efficiency and grid-connected / off-grid stability control quantity of the system, generates a control signal according to the dynamic efficiency and the grid-connected / off-grid stability control quantity, coordinates the work of each part, and ensures that the system can operate efficiently and stably in various operation modes.

The invention discloses a short-circuit current limiting and short-circuit recovery transient voltage control device and method for an aviation three-stage power generation system, and the device comprises a three-stage power generator, a power generator controller, a current sensor, a voltage and current collection module, and an asymmetric half-bridge excitation control circuit. Collecting the output current iL and voltage UL of the generator through a digital processor of the generator controller; when short circuit occurs, the given voltage USet of the voltage regulating loop is linearly reduced in a piecewise mode according to the relation between the iL and a preset threshold value, so that the generator works in a constant power interval; and when the short circuit is recovered, closing the upper / lower power tubes of the asymmetric half-bridge excitation control circuit according to the relationship between UL and a preset threshold value in a grading manner, and triggering a negative-pressure follow-current mode of a main excitation winding of the generator controller to quickly extinguish the field. The method can adapt to different generators without adjusting hardware circuit parameters, has no motor ablation risk during short circuit, has transient voltage less than 350V after short circuit recovery, has no power supply interruption in the whole process, has response delay less than 1ms, and greatly improves the safety and robustness of an aviation power supply and distribution system.

The invention relates to the technical field of power supply and distribution circuit devices, in particular to a power supply and distribution circuit device and a method thereof.The power supply and distribution circuit device comprises a transverse frame, a safety release mechanism and an adjusting mechanism, the bottom end of the transverse frame is fixedly connected with two sets of installation fixing rods, and a first supporting rod is arranged at the bottom end of the transverse frame; the two ends of the compensation body are fixedly connected with guide side plates, the two ends of the transverse frame are connected with side limiting plates through rotating shafts, pressure sensors are arranged at the top ends of the sides, close to the compensation body, of the side limiting plates, and power grooves are formed in the two ends of the transverse frame. The device can avoid chain collapse accidents caused by insufficient length of the electric wire during collapse accidents, and meanwhile, the device can protect the line to the greatest extent, so that the situation that the electric wire is damaged due to external force in the line repair process is avoided, the repair work of a user is reduced, the normal proceeding of the line repair work is ensured, and the production efficiency is improved. Line power supply time is shortened, and loss is further reduced.

The invention provides an open type avionics system for a multipurpose unmanned aerial vehicle, and relates to an unmanned aerial vehicle electronic system, the system comprises a comprehensive processing module, a navigation module, a servo module, a power supply and distribution module and a load module, and the modules realize data interaction through an interconnection bus; a protocol conversion module with standardized interfaces is further arranged between the load module and the comprehensive processing module, and the protocol conversion module is used for converting various non-standardized load interfaces into unified and standardized interfaces so as to support effective communication and data exchange between the load module and the comprehensive processing module. Based on the design ideas of comprehensive modularization, bus interconnection and interface standardization, all functional modules of an existing unmanned aerial vehicle electronic system are designed in a centralized and integrated mode, and the multipurpose unmanned aerial vehicle electronic system with high integration and interface standardization is formed.

The invention discloses a power supply and distribution cable with a power distribution terminal abnormal position detection structure, and relates to the technical field of power distribution fault detection. A distributed sensor unit, a signal acquisition and dynamic isolation module, a precise positioning algorithm module, a self-healing function module, a waterproof and anti-corrosion layer, a mechanical compression-resistant protection layer and a data storage module are embedded in the cable body in the length direction, and the precise positioning algorithm module utilizes multipoint signals of the distributed sensor unit to carry out precise positioning on the cable body. By calculating the time sequence and attenuation of abnormal signals, abnormal points are accurately positioned, the positioning error is smaller than 1 m, and an embedded LED lamp strip is arranged on the outer layer of the cable. According to the invention, the accurate positioning algorithm module and the LED lamp strip are installed, so that the rapid positioning indication function of a fault point is realized, the problem that the fault point in a long-distance cable is difficult to accurately position is solved, the fault point positioning speed and accuracy are improved, the fault can be rapidly maintained, and the cable shutdown time is shortened.

The invention relates to a method for intelligently judging the type of a single-phase earth fault in a power supply and distribution system, which is suitable for connecting arc extinguishing equipment to a system bus and is parallel to each feeder line connected to the system bus. Wherein the working stage of the arc extinguishing equipment is divided into an arc extinguishing equipment awakening stage, a fault phase selection arc extinguishing stage and a fault type line selection stage. When a single-phase earth fault occurs in the range of a system line where the arc extinction equipment is located, the arc extinction equipment is quickly awakened and enters a fault phase selection arc extinction stage, and the single-phase earth fault occurring in the system line can be quickly processed through three links of phase selection, verification and arc extinction. And the method has the capabilities of fault tolerance, error correction and severe transient process suppression in the processing process. A three-phase split-phase switch driven by eddy current is selected as a phase selection switch in the arc extinction equipment, and the two-phase switch cannot be switched on or switched off at the same time due to disorder switching-on and switching-off programs when the arc extinction equipment performs phase selection action due to the wiring mode of each phase switch coil panel in the three-phase split-phase switch.

The invention discloses a power utilization inspection task automatic generation and distribution method and system, and relates to the technical field of power supply and distribution, and the method comprises the steps: carrying out the data collection of regional nodes, building a regional node data set, carrying out the power utilization risk recognition, creating M power utilization inspection tasks, and building a first task priority; activating a backtracking extraction channel, carrying out electricity consumption information backtracking extraction, establishing M electricity consumption information sequences, and establishing a second task priority; and performing multi-agent adaptation analysis according to the first task priority and the second task priority, and establishing a power utilization inspection task distribution result. The method solves the technical problems of low task execution efficiency and slow response speed caused by dependence on manual arrangement and lack of intelligent analysis and real-time response capabilities of the power utilization inspection task in the prior art, and achieves the purposes of automatically generating the power utilization inspection task by fusing multi-source data, dynamically adjusting the task priority in combination with real-time data, and improving the efficiency of power utilization inspection. And the task execution efficiency and the response speed are improved.

The invention relates to the technical field of data center intelligent operation and maintenance, and particularly provides a power supply and distribution digital twinning application method and device for emergency deduction, and the method comprises the following steps: S1, data collection and processing; s2, power supply and distribution twin modeling; s3, knowledge acquisition; s4, constructing a knowledge graph; and S5, knowledge reasoning. Compared with the prior art, the method can solve the current situation that the emergency drilling scene and the online application are relatively separated, and deeply integrates the power supply and distribution digital twinning and the emergency drilling scene.

The invention relates to the field of power system monitoring and management, and particularly discloses an intelligent power monitoring and management system, which evaluates the operation performance of a power supply and distribution system in various power supply modes by acquiring operation information of the power supply and distribution system in a mains supply mode, an uninterruptible power supply mode and an emergency generator power supply mode in a data center. Potential fault hidden dangers of various power supply modes of the power supply and distribution system can be found in time, and maintenance measures are taken in advance; the action duration, the voltage transient amplitude, the frequency transient amplitude and the switching success rate of switching between the power supply modes of the power supply and distribution system of the data center are collected, the performance of switching between the power supply modes of the power supply and distribution system is evaluated, then it is ensured that the power supply and distribution system can be rapidly and stably switched under different power supply conditions, and the continuity of power supply is guaranteed; the performance health condition of the power supply and distribution system is comprehensively evaluated by combining the independent operation and coordinated operation performance of the power supply and distribution system, so that the reliable operation of the power supply and distribution system is ensured.

The invention relates to the technical field of low-voltage power supply and distribution systems, and discloses a dual-power-supply quick switching circuit for a low-voltage power supply system, which comprises a main power supply, a standby power supply, a circuit breaker QF1, a circuit breaker QF2, a relay KA1, a relay KA2, an alternating current contactor KM1, an alternating current contactor KM2 and a load, the main power supply is connected with the circuit breaker QF1, one path of the QF1 is connected with the KM1, and the KM1 is connected with the load; the other path is connected with the KA1 from the QF1, the KA1 is connected with the KM2, the KM2 is connected with a coil of the KM1 and then connected with the zero line N, and the 1B phase line and the 1C phase line of the main power supply are further connected with the two ends of the coil of the KA1; the standby power supply is connected with the circuit breaker QF2, one path of the QF2 is connected with the KM2, the KM2 is connected with the load, the other path of the QF2 is connected with the KA2 from the QF2, the KA2 is connected with the KM1, the KM1 is connected with a coil of the KM2 and then connected with the null line N, and the 2A phase line and the 2B phase line of the standby power supply are further connected with the two ends of the coil of the KA2. When the main power supply is abnormal, the standby power supply can be quickly switched to avoid shutdown of the lower-level equipment, the standby power supply can be automatically switched after the lower-level short circuit fault is isolated, and the power supply reliability of the low-voltage power supply and distribution system is greatly improved.

The invention relates to the technical field of control, in particular to an electric power supply and distribution intelligent scheduling early warning detection method and system, and the method comprises the steps: carrying out the clustering of the daily electricity consumption of a set number of days of an electricity consumption collection unit, obtaining a plurality of clustering clusters, and enabling each clustering cluster to represent a time period electricity consumption sequence with similar electricity consumption behaviors in one day; determining all power utilization time periods based on the time period power utilization sequence of each day; a complete electricity utilization period is constructed; screening the power utilization period to obtain an effective period; calculating a first ratio and a second ratio in the effective period; the difference value between the second mean value and the first mean value is used as the power utilization margin; and calculating the ratio of the current residual electric quantity of the power utilization unit to the power utilization residual quantity, and if the ratio is smaller than a preset residual quantity threshold value, giving out an early warning of insufficient power supply of the power utilization unit. The invention aims to optimize power resource configuration by formulating an effective power management strategy so as to ensure the stability of power supply.

The invention discloses a lightweight high-precision spaceflight electronic system based on a self-calibration inertial measurement unit, and the system is characterized in that a comprehensive information processing module provides an operation environment for flight control, multi-information comprehensive processing, guidance, attitude control, radar height measurement and terrain matching, and is responsible for inertial measurement unit self-calibration, inertial measurement error compensation, signal collection and logic judgment, and external communication; and performing satellite navigation solution and Beidou short message communication. The three-self-inertial-unit module is used for measuring apparent acceleration and angular velocity in three directions of a coordinate system of a spaceflight electronic system; the double-shaft indexing mechanism controls the frame shaft system to drive the inner table body to rotate and position; the satellite guide radio frequency module is responsible for down-conversion, filtering amplification and anti-interference processing of radio frequency signals and outputting digital intermediate frequency signals; the power supply electric control module is responsible for secondary power supply conversion, primary power supply and distribution, ignition time sequence control, ignition circuit self-inspection and time sequence voltage telemetering acquisition; the electrical interconnection assembly is responsible for the electrical interconnection function in the aerospace electronic system.