40results about How to "Increased safety margin" patented technology

The invention discloses a waste tire continuous thermal cracking feeding control method and system based on machine learning, and relates to the technical field of plastic waste recovery. The method comprises the following steps: acquiring a historical rear end socket temperature sequence and a historical internal pressure sequence of a cracker in a historical time window, and a rotation angular velocity and feeding rate sequence in a future preset time window; on the basis of the long and short-term memory network, predicting a predicted end socket temperature sequence and a predicted internal pressure sequence in a future window; with improvement of temperature, pressure and feeding rate stability as multiple targets, an adaptive feeding rate sequence is searched and output in a feeding rate adjustment space through digital twinborn simulation and an intelligent optimization algorithm in combination with the prediction sequence; and finally, carrying out feeding control on the cracker according to the sequence in a preset time window. According to the method, prospective optimization control over the cracking working condition is achieved, the hysteresis quality of traditional control is effectively overcome, and the stability, safety and automation level of the continuous thermal cracking process are improved.

The application discloses an electric energy-frequency modulation out-clearing method and system considering energy storage energy state elasticity, comprising the following steps: acquiring power grid topology, load prediction data and power grid operation constraint parameters, receiving the frequency modulation market declaration information and the electric energy market declaration information submitted by market subjects; determining the winning frequency modulation capacity and the frequency modulation mileage out-clearing price of each market subject according to a preset frequency modulation out-clearing rule; taking the frequency modulation market out-clearing result as a boundary condition, constructing an electric energy market out-clearing model considering energy storage energy state elasticity, setting the state of energy (SOE) of the energy storage operator at the end time as an optimization variable, and introducing the SOE adjustment cost curve into the objective function; solving the model to determine the day-ahead time node marginal price, the day-ahead time generation power of the generation unit operator, the day-ahead time charging and discharging power of the energy storage operator and the SOE at the end time, and converting the same into a power grid dispatching instruction; and performing frequency modulation market settlement and electric energy market settlement according to the out-clearing result.

The steam turbine cylinder pawl pressing device is characterized in that: a connecting bolt is used to connect a pressing block, a disc spring set, an adjusting gasket I, an adjusting gasket II, a special nut, a cylinder pawl and a bearing box, so that a downward load is applied to the cylinder pawl without affecting the relative sliding of the cylinder pawl and the bearing box, the safety margin of the cylinder stability is further improved, and the cylinder pawl floating is avoided.

The invention discloses a path planning method and device based on a variable expansion coefficient, and a storage medium. The path planning method comprises the following steps: obtaining state information of a vehicle and environment obstacle information; according to the state information of the vehicle, a dynamically-changing expansion coefficient is calculated, and the dynamically-changing expansion coefficient is at least in positive correlation with the current speed of the vehicle; performing expansion processing on an obstacle by using the dynamically changing expansion coefficient to generate an expansion area; generating a group of candidate paths based on the road reference line; candidate paths intersecting with the expansion area are removed, and an optimal path is selected from the remaining candidate paths to serve as an obstacle avoidance track; and outputting the obstacle avoidance track to a vehicle control system for execution. According to the method, the expansion coefficient dynamically related to the vehicle speed, the steering angle, the path curvature and other factors is designed, self-adaptive adjustment of the safety distance is achieved, and therefore the obstacle avoidance track which is safer and smoother and better conforms to the vehicle dynamic characteristics is generated.

The present invention provides a reinforced core material for a fan blade, comprising a core material and reinforcements distributed inside the core material. The reinforcements comprise one or more first reinforcements and one or more second reinforcements that are spaced apart from each other and alternately distributed, wherein the first reinforcement and the second reinforcement extend transversely to the length direction of the reinforced core material, the tensile modulus and tensile strength of the first reinforcement are greater than the tensile modulus and tensile strength of the second reinforcement respectively, the first reinforcement is formed via resin infiltration on one or more fibers of the same or different shapes, and the second reinforcement is a synthetic high polymer.

The utility model discloses an eVTOL airplane aileron structure, including aileron framework and the aileron skin that wraps in aileron framework outside. Aileron framework includes the beam of exhibition, chord rib, rudder angle and a plurality of suspension joint, and the beam of exhibition is composed of web and the edge strip of web upper and lower two sides. Rudder angle is composed of connecting portion and ear piece, and the web inside surface of beam of exhibition is fixed with suspension joint, and a plurality of suspension joint symmetrical setting is in the two sides of rudder angle, and the through -hole is set up on suspension joint. Chord rib includes two end ribs, a plurality of ordinary ribs and a plurality of leading edge ribs, and the aileron skin is composed of upper skin, lower skin and three connecting band plate. In the utility model aileron structure, the main body structure of rudder angle is connected in the inside of aileron, only the connecting ear piece of rudder angle is exposed in the air, and the wind area is very small, and the aerodynamic drag is small. Meanwhile, the other side of the beam of exhibition is designed with reinforcing joint in the position corresponding with rudder angle, and the reinforcing joint and rudder angle are connected together by fastener through the web of beam, and the connecting strength is high.

Embodiments of the present disclosure disclose a trajectory planning method, device, equipment and medium for a full-hanging truck train, the method comprising: obtaining a tracking deviation model for determining a first deviation vector of a target tractor and a second deviation vector of a target full-hanging trailer, and then constructing a trajectory optimization problem according to a safety margin evaluation function related to an actual state vector, safety constraints and the tracking deviation model, iteratively solving an initial reference trajectory in a region to be planned through the trajectory optimization problem, evaluating the safety margin by simultaneously considering the deviations of the tractor and the full-hanging trailer in the iterative solving process, obtaining an optimal target control quantity sequence, and then obtaining a target reference trajectory with the maximum passing safety margin, so that the full-hanging truck train composed of the tractor and the full-hanging trailer can pass with a larger safety margin, improving the safety of the full-hanging truck train passing through a narrow area.

This invention discloses a dynamic optimization method for the topology of a USV-AUV cooperative navigation network based on a consensus algorithm, relating to the field of cooperative navigation technology for marine unmanned systems. The method includes: constructing the relationship between the positioning error of the AUV and the distance measurement errors between the surface unmanned surface vessels (Surface UVs) and AUVs, and the positional errors between the Surface UVs, based on the positioning equations between the Surface UVs and AUVs using partial differential equations; designing a positioning accuracy evaluation function using optimal estimation criteria; obtaining the optimal solution for the evaluation function using the alternating direction multiplier method; simultaneously estimating the consistency of the formation center using a consensus algorithm and adjusting the dynamic formation parameters to obtain the optimal topology; and continuously acquiring the number of formation vehicles in real time. If the number of formation vehicles changes, the method iterates; if the number of formation vehicles does not change, the topology is maintained. This invention exhibits strong dynamic adaptability, constrained cooperative optimization, improved safety margin, and enhanced robustness.

The application discloses a construction method of a drag-reducing isolation structure applied to a precast pile, and belongs to the technical field of pile foundation construction, which comprises a precast pile, a drag-reducing isolation material, an isolation protective layer, a cement-soil pile, an energy circulation channel and an energy medium pump; the drag-reducing isolation material is uniformly distributed on the surface of the precast pile, the isolation protective layer is wrapped outside the precast pile and the drag-reducing isolation material, the cement-soil pile is outside the isolation protective layer and is bonded between the isolation protective layer; the energy circulation channel is arranged inside the precast pile, and the energy circulation channel and the energy medium pump are connected through a pipeline. The construction steps are as follows: precast pile manufacturing; drag-reducing isolation material manufacturing; isolation protective layer manufacturing; drag-reducing isolation material smearing; isolation protective layer wrapping; cement-soil pile construction; implanted precast pile processing; energy circulation reduces and eliminates negative friction drag; and continuous maintenance. The application can reduce the influence of negative friction drag on the precast pile through multiple active drag reduction, and has good engineering application value and popularization value.

A 50MW level heat pump energy storage system matching - 60 DEG C exhaust low temperature turbine belongs to the field of steam turbine design, in order to solve the problem that the low temperature turbine in the existing 50MW level heat pump energy storage system has poor flow efficiency and insufficient thermal performance in work, the application comprises a cylinder body, a rotor is inserted in the cylinder body, both ends of the rotor extend to the outside of the cylinder body, and both ends of the rotor are inserted into corresponding No. Bearing box or No. Bearing box, a No. Baffle sleeve and a No. Baffle sleeve are symmetrically installed on the inner wall of the cylinder body, and the No. Baffle sleeve and the No. Baffle sleeve are coaxially arranged with the rotor, two blade groups are symmetrically arranged in the cylinder body by double split flow mode, a plurality of moving blades in each blade group are installed on the rotor, a plurality of static blades in each blade group are installed on the No. Baffle sleeve or the No. Baffle sleeve, and the application is mainly used as a low temperature turbine matched in the 50MW level heat pump energy storage system matching.

The invention provides a steam generator heat transfer tube wear prediction and intelligent tube blocking method and system. The method comprises the steps that flow fields, vibration fields and wear databases of a heat transfer tube under different working conditions and positions are constructed through analogue simulation and real overhaul data of a nuclear power plant; constructing a training sample based on the constructed flow fields, vibration fields and wear databases of the heat transfer tube under different working conditions and positions; respectively training the flow field prediction model, the vibration field prediction model and the wear coefficient prediction model; during the unit overhaul period, operation data of a steam generator, position information of each heat transfer pipe and a supporting plate and corresponding abrasion data are obtained; respectively carrying out pretreatment; utilizing the trained flow field prediction model, vibration field prediction model and wear coefficient prediction model to predict the wear depth during the next overhaul; and judging whether the predicted wear depth during the next overhaul reaches or exceeds a set threshold value, and triggering and controlling the automatic pipe plugging operation when the wear depth reaches or exceeds the threshold value.

The invention belongs to the technical field of elevator anti-falling, and particularly relates to a freight elevator with a car anti-falling brake mechanism, which comprises a freight platform, a safety clamp, a traction rod, a sleeve, a speed limiting index and an auxiliary clamp, the freight platform is arranged at the bottom of a car and used for carrying passengers, and guide rails are arranged on two sides of the freight platform; the two safety tongs are arranged at the bottom of the cargo carrying platform, ascending connecting rod mechanisms for triggering linkage are arranged on the side faces of the safety tongs and used for enabling the safety tongs to grasp the guide rail, the traction rod is arranged between the two safety tongs, the two ends of the traction rod are connected to the ascending connecting rod mechanisms on the safety tongs respectively, and the sleeve is arranged on one side of each ascending connecting rod mechanism. The sleeve is used for limiting the movement range of the ascending connecting rod mechanism, and the sleeve is arranged outside the speed limiting index in a sleeving mode and is in sliding fit with the speed limiting index. Two-stage braking can be achieved, it is ensured that multiple sets of braking units respond quickly and synchronously during triggering, the safety margin is prolonged, reliable parking within a preset distance is achieved, and the safety of personnel and equipment is guaranteed.

The present application relates to a kind of importance field closed-loop driven radar point cloud real-time detection ranging system and method, belong to automatic driving environment perception.Solve the problems of poor real-time, low ranging accuracy, insufficient detection ability for special target and weak system robustness in prior art.Through cross-frame information multiplexing, invalid point cloud is pre-judged and filtered, detection feedback closed-loop is guided to balance efficiency and accuracy by hierarchical sampling, and the robustness is improved by calculating geometry to drive direction enumeration to fit bounding box, and accurate distance is calculated based on surface projection to replace center point estimation.Importance field is throughout the whole link of pre-judged filtering, hierarchical sampling, bounding box fitting and accurate ranging, forming a positive cycle.After system integration, the computing load is reduced, the perception reliability and safety in complex environment are enhanced, and the automatic driving and robot perception needs in various complex environments are adapted.

The application belongs to the technical field of control, and particularly relates to a kind of water-soluble fertilizer production preparation self-adaptive control method and system, method includes: the state parameter in reactor is collected, and after normalization, constitute multidimensional state vector;Through Gaussian process regression, the nonlinear mapping between current state and control input and state change is established, and the trace of predictive covariance matrix is used to represent posterior uncertainty index;Establish a stochastic differential equation containing Brown motion and compound Poisson process as a state space model, associate volatility, jump intensity and posterior uncertainty index to represent unmodeled dynamic risk;For concentration, pH value and temperature constraints, construct a stochastic control barrier function, and derive high probability safety constraints based on Itô-Lévy formula;With the minimum control cost and index deviation as the goal, a convex optimization problem is constructed, and the control amount is solved online to regulate the feeding, stirring and temperature control equipment, so as to consider the control cost, index deviation and production safety.

The invention relates to a disturbance scene-oriented load response strategy modeling and evaluation method and system, belongs to the technical field of intelligent power systems, and solves the problems of insufficient load prediction precision, user response modeling precision and strategy robustness evaluation. The method comprises the following steps: predicting a multi-scale prediction load sequence and high-frequency disturbance characteristics based on an original electric vehicle load and related auxiliary data; obtaining a response score based on the predicted load sequence and the high-frequency disturbance characteristics; constructing a double-layer master-slave game model to calculate an electricity price excitation strategy and a multi-microgrid adjustment power path based on the response score, the prediction load sequence, the system economic parameters and the constraint parameters; and in a multi-class extreme electric vehicle load scene, calculating a robustness index to evaluate a unified robustness score, and taking the unified robustness score as a feedback signal to adjust a response score or an electricity price excitation strategy and a multi-microgrid adjustment power path. And closed-loop linkage of prediction-behavior-economic game and robustness evaluation is realized.

The invention relates to the technical field of rack rail railway operation and maintenance, in particular to a multi-sensor fusion rack rail railway foreign matter cleaning system which comprises a sensing module with a first radar, an image acquisition device and a second radar, and the first radar and the image acquisition device are installed at preset positions of the upper portion of a train head. The first radar and the image acquisition equipment are used for acquiring train front environment data; the second radar is installed at the bottom of the train head and used for collecting data of foreign matter between racks and tooth grooves. The decision-making module is electrically connected with the sensing module, and the decision-making module is used for processing data collected by the sensing module and outputting an instruction; and the execution module is electrically connected with the decision module, and is used for cleaning the rack rail according to an instruction of the decision module. According to the multi-sensor fusion rack rail railway foreign matter cleaning system, the operation safety, reliability and passing efficiency of a rack rail train in a complex mountain environment are improved.

The application discloses a superconducting charging cable of fault current limiting type, and mainly solves the problems that existing superconducting cables cannot be used for bidirectional direct-current high-power charging and have complex structures. The superconducting charging cable comprises a cable framework and liquid nitrogen passage (1), a composite conductor layer (2) and a thermal insulation shell (3). The cable framework supports the composite conductor layer and the thermal insulation shell. The composite conductor layer is composed of inner and outer superconducting tape layers and inner and outer fault current limiting stabilizing layers, and is wrapped on the cable framework. The inner composite conductor layer and the outer composite conductor layer are separated by using an intermediate layer insulating bushing, so that the bidirectional direct-current charging function of the superconducting cable is realized. The fault current limiting stabilizing layer is armored on the superconducting tape layer, so that the fault current limiting function of the superconducting cable is realized. The thermal insulation shell is wrapped on the outer liquid nitrogen bellows, so that the heat leakage of the cable body to the outside is greatly reduced. The superconducting charging cable has a compact structure, does not need to use a fault current limiter, and can be used for connecting electrode terminals to perform high-power direct-current fast charging on electric vehicles.

This invention provides a nonlinear optimization control method, system, device, and readable storage medium. The method includes: constructing a quadratic programming subproblem at the current iteration point; the quadratic programming subproblem includes an approximate objective function and approximate constraints; solving the quadratic programming subproblem; if the feasible region of the quadratic programming subproblem is empty, determining the set of candidate directions that minimizes the constraint violation, and determining the direction that minimizes the approximate objective function in the candidate direction set as the target search direction; determining the iteration step size based on the target search direction, and determining a new iteration point based on the target search direction and the iteration step size. Compared with existing technologies, the control command sequence output by this invention naturally conforms to Newton's laws of mechanics, and the aircraft control system can execute it seamlessly; at the same time, this invention significantly reduces the parameter adjustment burden and human error risk for ground control personnel.

This invention relates to a control method for preventing the aggravated deviation of the inlet looper strip in continuous unwinding, comprising the following steps: Step 1: Inspect the appearance, shape, and information of the coil being fed in advance; Step 2: Set the central section process speed according to the process requirements of the subsequent strip, simultaneously meeting the feeding and threading time of the subsequent strip and considering the running status of the subsequent strip shape; Step 3: Feed and thread the subsequent strip to the welding machine during the online operation of the preceding strip; Step 4: After the uncoiler is completed online, use the time of pulling the inlet looper at the central section speed to automatically decelerate to a stop, unload, and shear the strip; Step 5: Ensure that the inlet looper is filled to the set value when the inlet unwinding is about to be completed; Step 6: Monitor the deviation of the hydraulic cylinders of the inlet section #1 CPC and the looper CPC; Step 7: Ensure the longest possible coil change time at the inlet; Step 8: After the inlet looper is filled, ensure stable operation of the unit. This ensures stable and high-speed operation of the production line.

The utility model discloses an airplane sewage outlet sewage pipe butt joint auxiliary device, include: connecting ring, it is used to set and fixed on the butt joint of sewage pipe, and connecting ring is sheet structure and its outside is equipped with at least two clamps, handheld piece is the hollow structure of two ends opening, and the connecting end of handheld piece is fixed on the inside of connecting ring and the diameter of its holding end is greater than the diameter of connecting end, wherein, when connecting ring installs on butt joint, the hose of sewage pipe is arranged on handheld piece. The utility model can improve the convenience of butt joint operation, guarantee the connection quality of sewage pipe on sewage outlet, reduce the risk that the airport is polluted by sewage due to the falling of sewage pipe in the use process.

The invention relates to the technical field of aero-engine lubricating oil systems, in particular to an energy storage lubricating oil system and an aero-engine, mainly comprising a bearing frame, a lubricating oil assembly, a turbine rotor assembly and a bearing assembly; the force bearing frame comprises a lubricating oil cavity, and a first oil way support and a second oil way support are arranged on the force bearing frame; the lubricating oil assembly comprises a lubricating oil tank and an electromagnetic valve; the lubricating oil tank comprises a piston cavity formed by a gas path cavity and an oil path cavity, and a piston rod is movably arranged in the piston cavity; the oil way cavity is filled with lubricating oil. A gas path piston and an oil path piston are fixedly arranged on the piston rod; and the gas path piston is used for pushing the oil path piston to feed lubricating oil into the lubricating oil cavity by utilizing airflow of an exhaust pipeline of the gas compressor. High-pressure air of the air compressor exhaust pipeline is used for replacing a pump lubricating oil loop to do work, the overall energy consumption and weight of the engine are reduced, the symmetrical layout of the air compressor exhaust pipeline is reasonably utilized, the double lubricating oil loops are designed, and therefore the effect that one path of lubricating heat absorption is achieved, and the other path of energy storage heat dissipation is achieved.

The present application relates to the technical field of power systems, and discloses an energy storage system, a control method, an electronic device, a storage medium and a program product, the energy storage system comprising a plurality of energy storage modules, each energy storage module comprising: a communication unit for sharing operation state data among the plurality of energy storage modules; and the control unit is configured to acquire the operation state data of other energy storage modules through the communication unit, and dynamically elect two energy storage modules in the plurality of energy storage modules to form a cooperative host pair based on a multi-agent decision rule, and the cooperative host pair cooperatively adjusts the power grid voltage and the power grid frequency of the energy storage system. According to the invention, each energy storage module is configured with the control unit, and the communication unit is utilized to share the operation state data, so that the system can dynamically elect a collaborative host pair composed of two energy storage modules based on a multi-agent decision rule. And the problem that the reliability of the whole system is reduced due to the fault of the fixed host is effectively solved.

This invention relates to a sealing cover structure for a dual-purpose container for the storage and transportation of spent nuclear power plant fuel, and pertains to the technical field of spent radioactive material storage. The invention includes a container body, double metal sealing rings, a sealing cover, and a monitoring device. The inner and outer covers of the container body are sequentially installed at the opening end of the cylinder. The double metal sealing rings are radially spaced between the outer cover and the sealing cover, forming two sealing barriers. The sealing cover is welded to the outer circumference of the container, forming an annular monitoring cavity with the outer cover. Bundles of tracer fibers are installed within the cavity. The monitoring device includes a pressure gauge, a sampling port, and a viewing port with a quartz endoscope. This invention improves reliability through multiple redundant seals and constructs a three-level monitoring system of "pressure warning, sampling confirmation, and intuitive positioning" using bundles of tracer fibers combined with intuitive endoscopic observation technology. This significantly improves leak location accuracy. The annular monitoring cavity also has a secondary containment function, adaptable to all operating conditions of integrated storage and transportation.

This invention discloses a stator oil-cooling structure for a flat wire motor, comprising a stator core and stator slots. The stator core includes a middle section core and a spray section core. The middle section core includes an oil inlet channel, a flow channel, and a keyway. The oil inlet channel is formed by rotating and stacking stator laminations, each lamination having a rectangular hole. The spray section core includes a guide channel and an oil spray hole. The guide channel is formed by rotating and stacking stator laminations, each lamination having a T-shaped hole and an elliptical hole. The oil inlet channel, flow channel, guide channel, and oil spray hole are interconnected, forming an oil circuit. This invention features a spray section at the end of the stator core, enabling direct spraying of cooling oil to the stator winding ends, ensuring good cooling performance, significantly reducing the complexity and manufacturing cost of the oil spraying system. The oil spray hole is positioned close to the bottom of the stator slot and axially facing the winding ends, allowing the oil to cover the entire winding ends and maximizing the reduction of winding end temperature.

This invention provides a method for dynamic capacity expansion micro-meteorological simulation of transmission lines, belonging to the field of power system technology. The method includes: extracting features from wind field simulation data under different operating conditions based on intrinsic orthogonal decomposition to obtain corresponding modes and constructing a wind field order reduction model; using wind field data from sparse monitoring points as constraints, solving for the weight coefficients of each mode using the least squares method to reconstruct the baseline wind field for the entire line; calculating and correcting the local wind field error at non-monitoring points based on the deviation between the measured wind field data from monitoring points and the reconstructed baseline wind field, thus obtaining the wind field for the entire line; identifying dynamic thermal bottleneck points and determining the maximum allowable current carrying capacity based on the wind speed at these bottleneck points. Beneficial effects: Through offline physical cost reduction, online sparse reconstruction, and residual correction, a limited number of monitoring points can accurately invert the complex wind field of the entire line, achieving low-cost, high-precision micro-meteorological spatiotemporal simulation of transmission lines and improving the safety margin for dynamic capacity expansion.

The present application relates to the technical field of heat runaway prevention liquid cooling plate, especially to the intelligent heat runaway prevention liquid cooling plate integrated with microcapsules and heat-sensitive valves and a use method thereof, the cooling flow channel comprises a liquid inlet main flow channel, a liquid outlet main flow channel, a plurality of branched upper branch flow channels, a plurality of branched lower branch flow channels, a liquid inlet emergency channel and a liquid outlet emergency channel, the liquid inlet main flow channel, the plurality of branched upper branch flow channels and the liquid inlet emergency channel are sequentially communicated and form an upper layer flow channel section, in use, heat is absorbed in the initial stage of temperature anomaly, the temperature rise rate is reduced, the system safety margin is improved, by setting a conventional cooling flow channel and an independent emergency cooling flow channel, only the corresponding branch flow channel forms an independent emergency cooling flow channel under local high-temperature working conditions through the action of a flow channel switching mechanism, targeted intensified cooling is realized, and the problem that when the temperature in a local area of an existing liquid cooling plate abnormally rises, the high-temperature cooling liquid in the abnormal area may affect the cooling stability of other areas is avoided.

The application provides a kind of implant surgery guide plate digital generation method and system, the method comprises: the spatial registration of multi-modal data of patient oral cavity is carried out, obtains three-dimensional virtual surgery environment;Key anatomical structure in three-dimensional virtual surgery environment is segmented, and according to the segmentation result, the clear degree of image different region quantifies segmentation confidence;The adaptive three-dimensional morphological inflation of segmentation confidence is realized through the mapping rule function of pre-set, obtains safe inflation radius, generates dynamic safety envelope according to each safe inflation radius;With the three-dimensional position and angle of implant as optimization variable, the optimization objective function of maximum stability and best prosthesis angle is established, with the hard constraint condition of not intersecting with dynamic safety envelope, the optimal implant three-dimensional pose is calculated;According to the optimal implant three-dimensional pose, generate surgery guide plate.The application can realize the optimal balance on two core targets of surgery safety and bone mass utilization rate.

The present application relates to the field of measurement switch control, and particularly relates to a power supply protection method and system for a measurement switch, which comprises: collecting multi-dimensional electrical quantity data of each node in a power distribution network within a preset time period at a fixed frequency and preprocessing; improving a cost function in a path search algorithm; searching for an optimal path node sequence from a power supply point to a target load point in the power distribution network based on the improved cost function, and generating a control instruction of the measurement switch according to the optimal path node sequence to control closing or opening of the corresponding switch. The present application fuses three core elements of a node's own abnormality degree, inter-node propagation correlation degree and local risk trend of path extension, guides the search algorithm to avoid nodes with obvious abnormality, and actively cuts off electrical channels with high abnormal propagation risk, thereby greatly reducing the probability of causing chain faults or safety accidents in the fault recovery process.

This invention discloses a temperature-adaptive heating method and system for lithium-ion batteries at low temperatures. The method selects between off-grid and grid-connected heating modes based on the lithium-ion battery state: In off-grid mode, the power devices inside the energy storage converter, along with the AC-side filter inductor, filter capacitor, and battery cluster units, are reconstructed into a closed internal resonant heating circuit. AC heating current is generated by periodically switching the power devices on and off to excite resonance. In grid-connected mode, the energy storage converter is controlled to periodically switch between rectification and inversion states to generate AC heating current. The method also involves three-phase bridge arm drive control and dynamic switching, battery cluster group heating, lithium plating prevention protection based on calibration tables and lithium plating indicators, bias current regulation, and DC support capacitor switching. This invention reuses existing hardware of the energy storage converter to achieve dual-mode adaptive heating without requiring additional power equipment, balancing heating efficiency and battery safety.

This invention relates to the field of power communication network technology, specifically to a power grid optimization method and system based on topology. The specific implementation process includes: monitoring the voltage phase angle change rate and queue congestion of the distribution network bus; establishing a two-layer heterogeneous topology model using test probe messages combined with circuit breaker opening and closing times; deducing the power flow state during fault-triggered self-healing, calculating the bus voltage phase angle drift, and conducting a loop-closed impact test; marking paths determined to have deviated from the fault as pseudo-connected communication domains and eliminating corresponding candidate switching actions to separate the safe operating domain; selecting the action combination with the smallest drift as the self-healing execution sequence and converting it into control action commands for issuance. This invention, through a two-layer heterogeneous topology model and a loop-closed impact test mechanism, achieves coordinated optimization of electrical state and communication resources, effectively avoiding control failures caused by communication unavailability or timing mismatch, and improving the stability and security of distribution network fault recovery.