24 results about "System accident" patented technology

The invention provides a circuit breaker action coil current characteristic diagnosis and analysis system and method. Belongs to the technical field of power system automation and substation state monitoring. The method comprises the following steps: carrying out synchronous wave recording on current of a plurality of circuit breaker actuating coils on a direct current feeder screen side to generate multi-channel synchronous wave recording data; meanwhile, SOE message information is collected, a circuit breaker with specific action is automatically matched and positioned by utilizing a timestamp and action identification information in an SOE message, and action circuit breaker positioning data is generated; the current waveform data of the circuit breaker actuating coil are collected in real time, and a high-precision algorithm is used for feature extraction and analysis, so that abnormal fluctuation in current change can be accurately captured, such as overlarge starting current and unstable holding current, the risk of misoperation or rejection of operation of the circuit breaker caused by abnormal current characteristics is reduced, and the service life of the circuit breaker is prolonged. Electric power system accidents caused by equipment faults are avoided, and the operation reliability of the circuit breaker is improved.

The application provides a circuit breaker operating coil current characteristic diagnosis and analysis system and method. It belongs to the technical field of power system automation and substation state monitoring. The method comprises the following steps: synchronously recording the current of a plurality of circuit breaker operating coils on the DC feeder line screen side to generate multi-channel synchronous recording wave data; collecting SOE message information at the same time, using the time stamp and action identification information in the SOE message to automatically match and locate the specific action circuit breaker, and generating action circuit breaker positioning data; through real-time collection of the current waveform data of the circuit breaker operating coil and the use of high-precision algorithms for feature extraction and analysis, abnormal fluctuations in current changes can be accurately captured, such as excessive starting current and unstable maintenance current, thereby reducing the risk of circuit breaker misoperation or refusal caused by abnormal current characteristics, avoiding power system accidents caused by equipment failure, and improving the reliability of circuit breaker operation.

The present invention provides an intelligent analysis system for porcelain insulators that combines mechanical and electrical properties, and relates to the field of monitoring data processing technology. The present invention can accurately track the path, speed, and direction of pollution flashover propagation from the starting porcelain disk to other porcelain disks by fusing multimodal images and time series analysis, thereby realizing dynamic modeling of the pollution flashover evolution process, effectively breaking through the limitations of the traditional static assessment model, and significantly improving the real-time and accuracy of risk assessment. The present invention marks the earliest pollution abnormal porcelain disk as the starting point of pollution flashover propagation through retrospective analysis of the integrated fusion abnormal points, and constructs a propagation chain and time series, which helps to identify key node porcelain disks and establish fault prediction logic based on evolutionary relationships. Through the dual-channel triggering mechanism, the early warning capability is significantly improved, ensuring that intervention can be made in the early stages of the risk, effectively preventing flashover from spreading to the entire string of insulators and causing system accidents.

The invention belongs to the technical field of nuclear power plant operation management, and particularly relates to an accident diagnosis general regulation automatic execution and online updating method and device, and the method comprises the steps: S1, carrying out the standardized analysis of an input DEC regulation design file, and outputting a DEC regulation analysis file; the DEC regulation analysis file comprises the extracted node object and the node criterion condition thereof, and a basic version expression of the generated node object described according to the node criterion condition. And S2, processing the DEC regulation and the DEC regulation analysis file into a picture file and a data object file which can be displayed and processed in the KIC system, and issuing the picture file and the data object file to the KIC system. And S3, carrying out online updating on the DEC regulation picture. Under a KIC software framework, the DEC regulation is processed in a standardized, digital and intelligent mode, the problem that the accident regulation of an original DCS two-layer KIC system has the possibility of human errors is solved, and meanwhile the accuracy of the regulation is guaranteed through online updating.

The invention discloses a power grid system accident monitoring and early warning system, which is characterized in that through combination of discrete wavelet transform and adaptive reclosing logic, combination of random walk and a Skip-Gram model, and combination of principal component analysis and a variational auto-encoder, dimensionality reduction and fusion are carried out on multiple types of feature vectors, so that low-dimensional efficient expression of multi-dimensional features is realized; the method improves the data processing efficiency, distributes dynamic weights for different types of features through the combination of improved Bayesian reasoning and a Transform model, carries out the weighted splicing, inputs the dynamic weights to a deep learning model for training, achieves the more accurate recognition of the operation state of a power grid, achieves the recognition of the operation state of the power grid through the combination of the construction of a hexagonal network and the improved A * algorithm, and achieves the recognition of the operation state of the power grid. According to the method, rapid path planning of the accident report is realized, and a smooth and stable transmission path is generated through combination of the Bezier curve and the dynamic reachability threshold, so that the real-time performance of data transmission is improved.

The present invention discloses a dynamic state estimation method for a distribution network based on adaptive set membership filtering, including: 1. Collecting distribution parameters and measurement information; 2. Establishing a dynamic state estimation model considering unknown but bounded noise, transforming the hybrid measurement data, linearizing the measurement function, and establishing a linear dynamic state estimation model in combination with a linear state prediction equation; 3. Time update, determining a prior estimate ellipsoid containing the current state ellipsoid based on the previous state ellipsoid and the system state equation; 4. Adaptive bad data detection, defining an adaptive detection threshold to identify and eliminate bad data in the measurements; 5. Measurement correction, using the measurement function and the measured value to correct the state prediction value, and determining a posterior estimate ellipsoid containing the current prior estimate ellipsoid and the measurement update ellipsoid. The present invention can achieve high-precision dynamic state estimation in an environment where the noise is unknown but bounded, can effectively identify and eliminate bad data when the measurement set contains bad data, and is of great significance for formulating the operation plan of the power system and preventing power system accidents.

The invention discloses an operation regulation and control method and device of a power system, terminal equipment and a storage medium. The method comprises the following steps: acquiring the total line power before an electric power system accident, the current looped network state, the number of regulation and control interval days, a first removal coefficient corresponding to the current looped network state, a second removal coefficient corresponding to the looped network state after switching, a first removal amount base value corresponding to the current looped network state and a second removal amount base value corresponding to the looped network state; wherein the looped network state comprises a looped network input state and a looped network exit state; when the current looped network state is a looped network exit state, the first removal coefficient is greater than the second removal coefficient, and the first removal amount base value is greater than the second removal amount base value; determining a generator tripping quantity difference threshold value according to the number of regulation and control interval days; and regulating and controlling the current looped network state according to the current looped network state, the line total power before the accident, the generator tripping amount difference threshold value, the first cutting coefficient, the second cutting coefficient, the first cutting amount base value and the second cutting amount base value.

This invention discloses a safety analysis method for ship SOFC systems, belonging to the field of risk prevention and control technology. It includes: identifying the causative factors of the ship SOFC system; constructing a failure fault tree and event tree model; constructing a Bow-Tie model based on the failure fault tree and event tree model; quantitatively analyzing potential causative factors to identify key factors affecting the SOFC system; combining the analyzed ship SOFC system accident causation data and collected ship fuel cell standard and specification data to form a data system and construct a ship SOFC system accident risk prevention knowledge graph; and conducting SOFC system safety analysis based on the ship SOFC system accident risk prevention knowledge graph. This invention clarifies the criticality, hierarchical relationship, and action path of each causative factor; constructs the causative factors into a complex accident causation network; and, combining the semantic information of the knowledge graph and the capabilities of complex network analysis, deeply reveals the accident causation propagation mechanism, providing a comprehensive perspective for understanding the occurrence and development of accidents.

The present invention belongs to the technical field of nuclear power plant safety, and particularly relates to a commissioning method for the accident discharge pipeline of the steam generator blowdown system in a pressurized water reactor nuclear power plant. There are several accident discharge pipelines (2) in the steam generator blowdown system, and each accident discharge pipeline (2) corresponds to one steam generator (1). It is led out from the steam generator (1) and directly connected to the in-containment refueling water storage tank (4). A drain isolation valve (3) is provided on the accident discharge pipeline. The commissioning method includes the following steps: Step S1, determining the test purpose; Step S2, determining the initial test conditions; Step S3, determining the acceptance criteria; Step S4, determining the test content. The present invention fills the domestic blank in the commissioning design method of the accident discharge pipeline of the steam generator blowdown system, can verify the correctness of the performance of the accident discharge pipeline of the steam generator blowdown system and the compliance of the design, and lays a foundation for the smooth progress of subsequent on-site commissioning.

To provide a system configured to detect a failure of a cable that transmits / receives electricity, and replace a faulty cable, thereby preventing an accident on the system or damages to human lives.SOLUTION: In a data processing system equipped with a data processing apparatus 12 and a smart device 14, a specific processing unit 290 in the data processing apparatus 12 executes specific processing, the specific processing including: means for detecting a failure of a cable for transmitting / receiving electricity; means for replacing a faulty cable when the failure is detected; and means for managing the entire system.SELECTED DRAWING: Figure 2

The present invention discloses a pre-training system for digital monitoring and analysis of facilities based on AI, specifically related to the field of AI, including a monitoring time division module, a data acquisition module, a data analysis and processing module, a sub-time region anomaly calculation module, a target time anomaly calculation module, a target time anomaly discrimination module, a target time warning module, and a target time optimization module. Through refined time region division and real-time collection of various sensor data, the present invention can comprehensively and accurately monitor pre-training changes, ensuring the comprehensiveness and accuracy of monitoring. Through the warning module, potential problems occurring in pre-training can be handled, avoiding the occurrence of system accidents, improving the performance of artificial intelligence, and reducing production costs and losses.

The embodiment of the present application provides a distribution network lightning protection accident intelligent analysis and positioning system and method, which relates to the field of distribution network lightning protection analysis. The system includes a data acquisition subsystem, a network service subsystem, an accident positioning subsystem, a lightning accident analysis subsystem, and an emergency response subsystem. Improve the current level of automation in the management of lightning strike accidents in distribution networks, integrate a comprehensive system with functions such as real-time monitoring, lightning strike accident positioning, and emergency response, and quickly and accurately locate the lightning strike accident area and evaluate the impact of the accident by real-time monitoring of the distribution network operation status. When an accident occurs, the main station computer immediately analyzes and processes the accident data and automatically alarms, and provides corresponding processing measures and suggestions, thereby improving the safety and reliability of the distribution network, further promoting the intelligence and energy saving and consumption reduction of the power system, and better meeting the needs of urban modernization construction.

The invention discloses a power system accident reserve capacity demand evaluation method and device based on dynamic threshold and climbing occurrence time interval selection and a medium, and belongs to the technical field of power system operation and control, and the method comprises the steps: collecting new energy historical data, and carrying out the preprocessing; identifying a new energy power climbing event based on an improved revolving door algorithm; screening the new energy power climbing events, and recording the screening as a first round of screening; performing a second round of screening on the screened new energy power climbing events; and carrying out climbing accident reserve capacity demand estimation on the new energy power climbing events after the second round of screening. The method has the beneficial effects that through a dynamic threshold screening mechanism, the rapid climbing event which has the greatest threat to the power system is accurately identified; according to the classification method based on the load time period and the climbing direction, the climbing events are divided into three types of upward climbing in the valley time period, downward climbing in the peak time period and continuous bidirectional climbing, and refined evaluation of standby requirements is achieved.

An accident point location device (6-1) according to the present disclosure comprises: a data acquisition unit (61) that acquires measurement data, which is at least one of a current and a voltage measured at an electric-supply station when a system accident occurred in a power system; and a location result inference unit (62) that acquires an inference result for an accident point by inputting, into a trained model generated by machine learning for inferring the accident point from a feature amount including at least part of the measurement data which is measured at the electric-supply station and / or processed data which is calculated from at least part of said measurement data, a feature amount including at least part of the measurement data which was acquired by the data acquisition unit (61) when the system accident occurred and / or processed data which is calculated from at least part of said measurement data and that corrects the inference result using an estimation result for the cause of the system accident and correction information indicating the probability for the accident point determined in accordance with the cause of the accident.

The application provides a high-temperature gas cooled reactor operation state evaluation system and method, and belongs to the technical field of high-temperature gas cooled reactors. The system comprises: a first priority evaluation unit for evaluating the health state of a pressure boundary system, a post-accident monitoring system and a reactivity control system, and controlling the power station unit to be prohibited from running when any system is in an unhealthy state; a second priority evaluation unit for evaluating whether a fuel loading and unloading system, a helium purification system and a nuclear island cold source system are in an unhealthy state, and controlling the power station unit to be limited to run when any system is in an unhealthy state and the evaluation result of the first priority evaluation unit is healthy; and a third priority evaluation unit for evaluating whether a start and stop system, a water vapor system, a steam turbine and an auxiliary system are in an unhealthy state, and controlling the power station unit to be run with defects when any system is in an unhealthy state and the evaluation results of the first priority evaluation unit and the second priority evaluation unit are both healthy, thereby facilitating efficient operation of the power station.

A power system stabilizing system includes an accident detector, a power restriction target selector, a cutoff controller, and a reconnection controller. The accident detector is configured to detect a system accident of a power system. The power restriction target selector is configured to select power restriction targets which are required for stability maintenance of the power system out of a plurality of power supplies included in the power system or connected to the power system according to a type of the system accident detected by the accident detector. The cutoff controller is configured to cut off the power restriction targets selected by the power restriction target selector. A system restoration checker is configured to check that the power system has been restored from the system accident on the basis of system information of the power system. The reconnection controller is configured to reconnect some or all of the power restriction targets cut off by the cutoff controller when the system restoration checker checks that the power system has been restored from the system accident.

The invention discloses a cross-dimensional data fusion diagnosis method for accident tripping of a power system, belongs to the technical field of power systems, and aims to solve the problems of single data dimension, difficulty in fault feature extraction, low diagnosis efficiency, backward diagnosis model, low automation degree and insufficient algorithm generalization capability and adaptability in the prior art. Comprising the following steps: S1, acquiring multi-source data; s2, preprocessing and fusing the data; s3, performing tripping diagnosis analysis; s4, automatically generating a report; s5, a diagnosis result is pushed; according to the invention, by covering multiple types of data such as equipment telemetering and telesignalling, weather and defects, the limitation of single data is broken through, information islands are eliminated, and tripping accidents caused by environmental factors and equipment hidden dangers can be accurately reflected; through cleaning, integration, association and noise and abnormal value removal, high-quality training resources are formed, a reliable data basis is provided for a diagnosis model, and diagnosis deviation is avoided.

The present invention relates to a post-accident power flow transfer optimization control method for an energy storage power system. After a power system accident is detected, the power flow transfer trend of the power grid is quickly estimated through the power flow to predict the overload line, and the adjustable generator sets, interruptible loads, and sound DC and energy storage power stations with good power flow control effects in the network are selected as control variables; based on the data of each meteorological observation station covered by the transmission channel corridor in the actual power grid, the line is gridded and segmented to form a line current-temperature grid estimation method considering the meteorological distribution, thereby improving the estimation accuracy of the line overload capacity; with the minimum control cost as the goal, a power flow transfer optimization model containing an energy storage system is established, and a control plan is quickly given to fully tap the energy storage regulation capacity and the line overload tolerance capacity, and effectively block the power flow transfer of the power grid and the spread of overload accidents; the power flow transfer optimization control method provides a new control means and decision-making plan basis for ensuring the safe operation of a new power system.

The embodiment of the invention provides an intelligent analysis and positioning system and method for a lightning protection accident of a power distribution network, and relates to the field of lightning protection analysis of the power distribution network. The system comprises a data acquisition subsystem, a network service subsystem, an accident positioning subsystem, a lightning stroke accident analysis subsystem and an emergency response subsystem. The automation level of lightning stroke accident management of the current power distribution network is improved, a comprehensive system integrating the functions of real-time monitoring, lightning stroke accident positioning, emergency response and the like is integrated, the lightning stroke accident area is quickly and accurately positioned by monitoring the running state of the power distribution network in real time, and the accident influence is evaluated. When an accident occurs, the master station computer immediately analyzes and processes accident data, automatically gives an alarm and provides corresponding processing measures and suggestions, so that the safety and reliability of the power distribution network are improved, the intelligence, energy conservation and consumption reduction of a power system are further promoted, and the requirements of urban modernization construction are well met.

A restoration decision-making assistance apparatus and method are capable of restoring customers of a power outage by planning an isolated operation at the time of power outage restoration of a power distribution system and preparing a restoration work plan in consideration of the plan. A power system section, disconnected due to a power system accident, is connected to a power system again. A planning unit defines a switch section divided by adjacent switches for the disconnected section, and prepares an isolated operation plan with at least a switch section which includes a distributed power source therein or in which a power source vehicle is arranged as an isolated operation section. An isolated operation planning unit prepares an operation plan with a switch section in which a system accident is present as an isolated operation section and a restoration work plan is prepared for the isolated operation section.

The invention relates to a power distribution network power supply reliability evaluation method and system, and the method comprises the steps: building a fault power failure influence factor evaluation system based on the analysis of power distribution network fault power failure influence factors of an analytic hierarchy process; building an improved firefly algorithm and relevance vector machine combined FA-RVM prediction model, and predicting a power distribution network fault power failure index; based on a simulated annealing-particle swarm optimization algorithm, constructing an SA-PSO-RVM prediction model; and designing a double-model complementary power distribution network fault power failure prediction platform, and predicting power distribution network fault power failure indexes, the double models being an IFA-RVM prediction model and an SA-PSO-RVM prediction model. The advanced algorithm model is utilized to predict the distribution network fault power failure, the requirements of safe, reliable and economical operation of the power system are met, the reliability of the power grid can be improved, accidents of the power system are reduced, and the economic benefits of power grid operation are improved.

The invention belongs to the technical field of safety production management and accident analysis, and particularly discloses a limited space poisoning suffocation accident risk evolution path deduction method and system. According to the method, multiple historical cases are concluded and analyzed, and a multi-level system accident cause model is constructed; performing quantitative analysis on the historical accident case data by applying a related data mining algorithm so as to establish a quantitative association relationship among the cause factors; receiving one or more initial risk factors input by a user, and deducing and identifying a risk path according to the established quantitative association relationship; and comprehensively evaluating the identified risk path, determining a key risk factor combination, and generating a decision analysis report containing preventive management and control suggestions. The problems that traditional accident analysis is insufficient in depth and the process is difficult to quantify are solved, a scientific, quantitative and highly targeted basis is provided for safety management decision, and scientificity and effectiveness of limited space operation safety management are remarkably improved.

To prevent step-out in advance, by correcting a power control amount necessary for preventing step-out at occurrence of an accident in a system.SOLUTION: A stability evaluation model generation unit of a system stabilization system prepares, before occurrence of an accident, model definition information for estimating a future value of phase angle deviation that is used for discrimination of presence or absence of the step-out of one or more power generators included in an electric power system, and a discrimination reference value that is used for discrimination of the presence or absence of the step-out of the power generators. A correction coefficient generation unit of the system stabilization system prepares, before the occurrence of an accident, correction preparation information for determining a correction value necessary for estimation of the future value of the phase angle deviation that is used for discrimination of the presence or absence of the step-out of the power generators. An additional power control execution unit of the system stabilization system adjusts the discrimination reference value on the basis of a measured value of the electric power system after the occurrence of an accident, and when discriminating that the power generators step out on the basis of the measured value of the electric power system before and after the occurrence of the accident, model definition information, the future value of the phase angle deviation predicted from the correction preparation information, and the discrimination reference value after the adjustment, selects an additional power control power generator and controls the power of the power generator.SELECTED DRAWING: Figure 1

The invention provides a porcelain insulator intelligent analysis system combining mechanical and electrical performance, relates to the technical field of monitoring data processing, and can accurately track the transmission path, speed and direction of pollution flashover from a starting porcelain plate to other porcelain plates by fusing multi-modal images and time sequence analysis, thereby improving the analysis accuracy of the pollution flashover. Dynamic modeling of the pollution flashover evolution process is achieved, the limitation of a traditional static evaluation mode is effectively broken through, and the real-time performance and accuracy of risk evaluation are remarkably improved. According to the method, through backtracking analysis of comprehensive fusion abnormal points, the earliest pollution abnormal porcelain plate is marked as a starting point of pollution flashover propagation, and a propagation chain and a time sequence are constructed, so that key node porcelain plates can be identified, and fault prediction logic based on an evolution relation is established. And through a double-channel triggering mechanism, the early warning capability is remarkably improved, intervention can be performed in the early risk stage, and flashover is effectively prevented from spreading to the whole string of insulators to cause system accidents.