64 results about "System accident" patented technology

The invention belongs to a risk evaluation method for the operation of a large power grid. The method comprises the following steps of (1) statistics of fault and risk factors; (2) computation of risk probability; (3) risk quantitative evaluation based on the load loss; (4) classification and result evaluation on risk index. According to the risk evaluation method for the operation of the large power grid, the occurring probability of power system accidents and the number of load loss of the system are combined to form a new quantitative index, so a scheduling person can be helped to perform real-time risk evaluation and analysis, can further comprehensively master the safe operation condition of the power grid, and controls the risk level of the system within a reasonable range by adopting necessary measures, and the occurrence of the disaster fault is avoided. The real-time evaluation and management and control on the risk are realized by a power gird scheduling center and the method belongs to a load loss-based risk evaluation method for the operation of the large power grid.

The invention discloses a rotor bearing system accident comprehensive information analysis method and a device thereof, wherein one section of a rotor is radial and vertically mounted with two sensors X, Y, the axle end of the rotor is axially mounted with a sensor Z, the radial and axial information of the rotor motion transmitted by the sensors are fused to analyze the motion state of the rotor bearing system, the axis center line position and the axis center track of the rotor in the X-Y, Y-Z and Z-X planes of a dimension space are described and displayed visibly to completely and accurately describe the spatial motion information of the rotor, and the information contains the unique diagnosis information as dimension space eccentricity, an attitude angle, a precession direction and vibration vector direction and the like, thereby improving the ability for visually recognizing the accidents of a rotary machine.

A system for realizing operation system backup comprises a system insulation module and a backup control module. And a relative method comprises that 1, the backup control module sends the command for building a new sub operation system module to the insulation module, 2, the system insulation module based on the command, the mother operation system and / or prior sub operation system module executes the operation to build the new sub operation system module, 3, the backup control module stores the backup relation information relative to the new sub operation system. The invention can start backup operation system without interrupting user operation, realize real-time backup of user data, and quickly repair the operation system accident.

The invention relates to an accident detection system and method of SoC System on a chip, which comprises the following parts: strong detection circuit for complete integration chip; detection invitation mechanism whose circuit connects together with serial detection buses; parallel detection bus; IP (Intellectual Property) seed rim packaging chain circuit unit; clock controlling unit and IP seed selection decoding unit. The invitation detection mechanism consists of IP seed independent invitation detection mechanism and IP accident invitation detection mechanism between seeds. This invention adapts each present IP (DFT Design for Testability) method to detect circuit by system layer and IP seeds, which improves system accident percentage of coverage on the integration chip.

The invention discloses a method for online testing performance of lead-acid storage cells of a transformer substation. The method includes the steps that capacity of each single storage cell body is acquired through an instantaneous discharge method, the inner resistance of each single storage cell body is detected through an alternating current phase method, the instantaneous discharge method is corrected by the alternating current phase method, interference of the instantaneous discharge method in neighbors of open-circuit cells is eliminated, and then real-time online nondestructive testing of the performance of a storage cell set is achieved. According to the method for online testing the performance of the lead-acid storage cells of the transformer substation, the instantaneous discharge method and the alternating current phase method are combined, the inner resistance, the capacity and other performance parameters of each single storage cell body can be measured in real time, and then the cells with degraded performance can be found in time at the early stage of degradation of the storage cells, and severe direct current system accidents caused by degradation accumulation and intensification of the storage cells are avoided.

An electric network emergency management system based on geographical information technology includes a digitalization scheme module, a disaster dynamic demonstration module, a disaster condition statistical module, an information report module and the like. It is capable of implementing accuracy prewarning and response to one kinds and grade emergency event, and automatization application of the electric network emergency scheme; rapidly providing disaster evolvement analysis result with reference content; having automatization, high efficiency and intelligence, and thoroughly exhibiting electric network accident conditions, effectively reducing workload and guiding electric network accident treatment to ensure the electric network loss to be minimum. The system provides technology support for reducing society loss and breakage caused by electric network system accidents, and improving emergency response efficiency and command of electric network safety management.

The invention discloses a system accident reserve capacity coordination distribution method based on risk quantization, which belongs to the field of power system safe planning and operation. According to the invention, the accident probability in a region, the system reserve adjustment cost and the system outage loss are considered; consideration is given to the reserve configuration scheme risk quantization evaluation indexes of the system reliability and economy; quantization is carried out on accident reserve configuration and risk caused by insufficient configuration; and the system accident reserve capacity is shared according to the percentage of the accident reserve configuration risk index of each region in the risk index of the whole system. According to the invention, the probability of different accidents is discriminated; different requirements of different loads on the reliability are considered; and compared with the traditional accident reserve capacity distribution method, the system accident reserve capacity coordination distribution method based on risk quantization is more rational and scientific.

The invention discloses an emergency disposal method for an accident of an aluminum ethyl production system. The emergency disposal method comprises the following steps of dividing the production system into a plurality of production units; determining the fire danger class of each production unit according to the material and process characteristics of the production unit, and making a corresponding emergency plan aiming at each fire danger class; when the accident occurs, according to alarm information, determining the production unit where the accident occurs, starting up the corresponding emergency plan, and informing relevant departments to perform accident disposal; analyzing an accident cause after the accident disposal is finished, reassessing the fire danger class of the production unit where the accident occurs, and updating the corresponding emergency plan. The emergency disposal method for the accident, provided by the invention, is timely in accident emergency response and high in efficiency.

The invention discloses a hydrogen production system based on AEL and PEM water electrolysis and a situation control method. According to the hydrogen production system, an AEL water electrolysis tank and a PEM water electrolysis tank are matched with each other and highly integrated in a water electrolysis hydrogen production system, and anaccident early warning monitoring method based on situation awareness is provided in consideration of a related complex management and control system, and is different from the lacking of situation awareness early warning function for detection information in an existing water electrolysis hydrogen production system. According to the invention, an optimal working mode of a hydrogen production system is evaluated based on accident entropy, the situation awareness object category is predicted after the situation awareness information is acquired, and then the increment change of the working mode of the situation awareness object to the accident entropy of the system is evaluated so as to provide the increment direction of the accident situation for accident early warning, so that the system can autonomously obtain a control decision through situation awareness information analysis, adjustment is carried out through different pieces of situation awareness information, and optimal working situation optimization of the system is achieved.

The invention provides an action report visualization display method based on a common format for transient data exchange (COMTRADE). An action report is finally presented in a WORD form through extending information name namespace of a header file (HDR file), using different characters to carry out identifier classification, and carrying out data and format conversion on the HDR file of an ASCII text file. The method will bring great convenience to remote analysis, evaluation and simulation of a power system and protection and control thereof under the circumstance of fault disturbances. According to the method provided by the invention, a large amount of data comparison and format optimization are carried out, achieving the same effect with serial printing display of a protection device is finally realized, and an output action report file can satisfy requirements of power system accident analysts. The method can be transmitted and used among different application systems of WINDOWS, LINUX and the like, and has a higher practical value for power system fault report analysis.

The invention discloses a substation operation and maintenance path planning navigation system and navigation method based on Beidou positioning, which comprises the following steps: a Beidou positioning module is respectively connected with a path planning module and a path navigation module; The operation and maintenance task receiving and analyzing module is connected with the path planning module; The database module is connected with the path planning module and the path navigation module respectively. The path planning module is connected with the path navigation module; the path navigation module can obtain the real-time position of the user through the Beidou positioning module, The optimal path calculated by the path planning module is used to provide the user with voice prompts in four travel directions: forward, backward, left turn and right turn, and the path navigation module sends out voice warning prompts when there is a charged area or a path charged area within 50 meters around the user, so as to guide the user to travel safely. The system and method can solve the problem of power system accidents and personal accidents caused by substation operation and maintenance personnel walking in the wrong interval and mistakenly entering the live area.

The invention discloses an improved phase difference correction method taking regard of the power grid frequency change rate. With respect to the improved phase difference correction method, based on the frequency change rate, the normalized frequency correcting value is corrected. Compared with a conventional method, the improved phase difference correction method taking regard of the power grid frequency change rate is more suitable for the frequency dynamic change condition, can achieve accurate and fast harmonic parameter measurement when the frequency fluctuation range is relatively large, the frequency change is uncertain even frequency collapse occurs, can accurately determine the change of the frequency change rate, and is beneficial to taking emergency control measures timely when the system frequency is abnormal to prevent grave electric system accidents such as large-scale power failure.

A protection relay device for judging whether an accident point of a power system exists within a specified range, comprising: filter components 1 and 2, for inputting sampling data of voltage and current of the power system into a digital filter having a specified transfer function, Output the first voltage data and the first current data and the second voltage data and the second current data which are orthogonal to the first voltage data and the first current data respectively; the calculation parts 3, 5, 7 and 9, according to the first time the first voltage data, the first current data, the second voltage data, the second current data, and the first voltage data, the first current data, the second voltage data, the first voltage data, the first current data, the second voltage data, the first time two current data to calculate a prescribed measurement value; and an operation judging part, which performs an operation judgment according to the prescribed measurement value obtained by the calculation part. Even if the high-frequency components are generated in the accident voltage and current of the power system, the present invention is not affected, and the reliability can be improved.

The invention discloses an accident inversion system and an accident inversion method of an electric power dispatching automation system. The accident inversion system of the electric power dispatching automation system is characterized by comprising an accident inversion control unit, a historical alarm data acquisition module, a historical database, a historical change data acquisition module, a time series database, a graphical client and an alarm client, wherein the accident inversion control unit is connected with the historical alarm data acquisition module, the historical change data acquisition module, a graphical client display module and an alarm client display module; the historical alarm data acquisition module is connected with the historical database; and the historical change data acquisition module is connected with the time series database. The invention further discloses an accident inversion method of the electric power dispatching automation system. The accident inversion system and the accident inversion method of the electric power dispatching automation system enables the dispatching monitoring personnel to carry out inversion on power grid data at any time so as to analyze operating conditions of a power grid.

A superconducting arcing induction type DC circuit breaker includes a superconducting fault current limiter and an arcing induction type DC circuit breaker connected in series to each other. The arcing induction type DC circuit breaker includes an induction member that has a through-hole, is continuously formed in a 360-degree direction, and has a certain shape and thickness, and an induction needle that protrudes from an inner surface of the induction member toward a center of the induction member. A contact point where an anode and a cathode, which are mechanical contacts, approach from opposite directions and come into contact with each other is formed in the through-hole of the induction member, and the anode and the cathode are separated in a direction far away from each other. The induction needle induces arc generated upon contact opening when the anode and the cathode are separated from each other in the event of system accident of DC power or AC power, and the induction member quenches the induced arc by the flow of the induced arc to ground through a ground line.

The invention discloses a power grid accident auxiliary processing method and system and relates to the technical field of power system accident processing. On the basis of a D5000 smart power grid dispatching control platform, after an accident occurs, accident information and related parameter information are searched; process guidance and analysis processing are carried out on the accident through a standard processing process preset in a process management module; and moreover, a case report file is generated according to the whole processing process and the case report file stored. Through application of the method and the system, the daily working intensity of power dispatchers is mitigated, the complicated power grid accident processing process is standardized, the power grid accident processing capability of a dispatching center is improved, and the power grid accident processing accuracy and speed are ensured.

A plant simulator which makes it possible to set factors which could invite a system accident and to simulate the process of occurrence of a system accident. The plant simulator has a plant monitoring and operation unit 300 which displays on a display screen parameters and the plant status computed by a plant simulation unit and, by using this display screen, gives the plant simulation unit the operation performed on the plant; and a simulation instructing unit 100 which, connected to a terminal screen, gives the plant simulation unit the setting of initial values necessary for simulation from this terminal screen and a demand instruction, which may be to demand discontinuation of the execution of simulation, the plant simulator simulating a system accident according to a control model and a plant model, further including a system accident factor database 504 in which action logics of system accident factors matching the control model are stored; a system accident factor selecting unit 500 having a selecting device for taking out data stored in this system accident factor database; and a system accident executing unit 400 which executes a system accident on the basis of data taken out of the system accident factor selecting unit, whereby the system accident is simulated.

The invention discloses a liquid hydrogen adding system fault diagnosis and real-time alarm method comprising the following steps of: S1, analyzing the fault mode of the liquid hydrogen adding system; S2, acquiring the probability density function of each fault by means of statistical analysis of historical data; S3, acquiring the fault incidence rate of the whole system by using a dynamic weighting fault tree; S4, describing a system accident generation and danger propagation process by using a risk analysis method; S5, acquiring a loss function of the system in combination with casualties, property loss, and social influence caused by accidents; and S6, evaluating the running performance of the system by using a danger index and achieving a dynamic system alarm. The method achieves real-time dynamic description of the liquid hydrogen adding system by using the dynamic weighting fault tree, fast acquires the real-time fault incidence rate of the system, achieves accident generation and danger propagation dynamic description by using the risk analysis technology, evaluates the running performance of the system in real time, achieves dynamic system alarm, and further gives system overhaul time.

The invention relates to a multi-working-condition power system stability analysis method and device. The device comprises a data acquisition module, a Markov multi-working-condition system generation module, a stability analysis module and a result output module, wherein the data acquisition module is used for acquiring network structure parameters, power flow before and after a system accident, and a generator frequency and a power angle in a system; the Markov multi-working-condition system generation module is used for establishing a discrete Markov multi-working-condition power system model; the stability analysis model is used for determining a stability criterion and judging the system stability; and the result output module is used for outputting a system stability result judged by the stability analysis model. Through adoption of the multi-working-condition power system stability analysis method and device, the stability of a power system under multiple working conditions can be effectively analyzed. Moreover, the method and device are easy to implement; judgments can be made easily; and the goodness of fit with the practical situation is high.

A protective relay device for a power system capable of reliably removing an accident point even for an accident within a protection interval that occurs during a system swing when a phase is lost. The swing detection circuit (PSB) (11) that detects the swing of the power system, the phase loss state detection circuit (LOP) (12) that detects the phase loss state, and the reverse phase change direction relay (front accident judgment part) (DI2-D ( F)) Each output of 13F is input into the AND circuit (15), and only in the system swing (in PSB action) in the phase loss state (LOP action) a system accident occurs, and the system accident is judged to be When the terminal (substation) is still in the forward direction (DI2-D(F) operates), a disconnection permission signal 16t is sent to the other terminal, and a disconnector disconnection signal ( 19 ) is output.

The invention relates to a method for processing static voltage stability risk information of a power transmission system. The method comprises the steps as follows: forming a system accident state set I; 2), sequentially extracting a system accident state from the system accident state set I; 3), judging whether the accident state can maintain the static voltage stability if yes, performing step 5), and otherwise, classifying the accident state to a set S1; 4), adopting a minimum load-shedding optimization model to perform optimization, and judging whether the load of an optimized system is required to be removed, if not, directly performing the next step, and if yes, performing next step after the system accident is classified to a set S2; 5), judging whether the system accident states in the system accident state set I are completely enumerated, and if yes, performing the next step, otherwise, returning the step 2); and 6), calculating probability and a system risk value of each accident state in the set S1 and the set S2. Compared with the prior art, the method has the advantage of high accuracy.

The invention provides a decompression-preventing hydraulic control loop and a method thereof. The hydraulic control loop comprises, at least, an integrated hydraulic cylinder and an oil-way cutting-off hydraulic loop, wherein the integrated hydraulic cylinder comprises a hydraulic cylinder body and a hydraulic cylinder integrated valve block, the hydraulic cylinder integrated valve block is installed on the hydraulic cylinder and used for controlling start and stop of the hydraulic cylinder and locking of the hydraulic cylinder during system decompression, and the hydraulic cylinder integrated valve block is connected with the oil-way cutting-off hydraulic loop and used for controlling actions of the hydraulic cylinder and cutting off of an oil way of the hydraulic cylinder during system decompression. The invention further provides the method for achieving the decompression-preventing hydraulic control loop. The decompression-preventing hydraulic control loop has the advantages of being simple in structure, safe, reliable and quick in accident response, being unlimited in hydraulic cylinder installation direction and being of a load type and can be combined with external pressure monitoring to achieve predictive control of system accidents. In addition, when a control system is accidentally powered off, the hydraulic cylinder is in a safe locked state. The decompression-preventing hydraulic control loop is suitable for the occasion having the higher requirements for a hydraulic cylinder stop position state during system decompression.

The present invention provides an automated system detecting and maintaining and cost estimating method of oil-gas field production facility, mainly including following steps: (1) processing detection and maintenance to the automatic system in a fixing cycle; (2) processing quality evaluation to the detecting and maintaining results according to the evaluating technical requirement; (3) estimating the cost of the detection and maintenance, which provides reference and standard for the automatic system detecting and maintaining cost; (4)testing the receiving the detecting and maintaining results, checking whether meeting the automatic system technical requirements or not, whether going into service or not. The benefical effects of the method are eliminating automatic system fault hidden trouble by detecting and maintaining automatic system in a certain period, reducing accidents, prolonging automatic system life, improving automatic system operating effect and efficiency, preventing adverse impact and environment pollution caused by the automatic system accident.

The invention relates to an auxiliary decision-making system of a power distribution network. The invention provides an auxiliary decision-making system of a power distribution network. The system comprises a supporting platform, the supporting platform is used for real-time monitoring, online monitoring and network analysis, and the supporting platform is used for making an accident handling decision on the condition that a power distribution network operates and analyzes, and performing operation after a decision scheme is given and processed. According to the power distribution network auxiliary decision-making system provided by the invention, on the basis of software such as network analysis and the like, auxiliary assertions are carried out under the conditions of operation risks andfault processing in power grid dispatching operation, rapid analysis and calculation are carried out, and the system state mastering and system accident processing capabilities of dispatchers are improved.

The invention relates to the technical field of waste gas waste heat recovery, in particular to a system for recycling industrial waste gas waste heat by means of heat transfer oil. The system comprises a three-way valve which communicates with an industrial waste gas source pipeline, wherein one outlet of the three-way valve communicates with an air cooler through a bypass flue, and the air cooler communicates with a flue gas ultralow emission system; and the other outlet of the three-way valve communicates with a flue gas inlet of a heating module or / and a flue gas inlet of a power generation module through a waste gas inlet flue, and a flue gas outlet of the heating module or / and a flue gas outlet of the power generation module communicates with the flue gas ultralow emission system. The bypass flue is arranged and used as an emergency bypass device during system accidents or overhauling, and therefore sudden faults and maintenance of the system can be timely carried out; by utilizing waste heat of industrial waste gas, the system can selectively recycle heat or power generation, the waste heat of the waste gas can be fully utilized, reasonable arrangement can be carried out according to different regions and customer requirements, and the system has good applicability.

The invention relates to an electric power emergency disposal system for hazardous chemical substance accidents. The system comprises an accident monitoring system, an accident early warning system, an information platform system and a command system, the systems work cooperatively according to different stages of an accident, and when the accident occurs, the monitoring system monitors physical parameters of a hazardous chemical substance accident and operation parameters of an electric power system; the accident early warning system is used for judging the accident level according to the information of the monitoring system and sending accident early warning information according to a judgment result; the information platform system is connected with the accident monitoring system, the accident early warning system and the command system. The information platform system stores basic information of hazardous chemical substances, an electric power system, emergency rescue equipment andpersonnel and provides a decision basis for the command system according to a judgment result of an accident level and the basic information, and the command system is used for commanding the rescueequipment and the personnel to carry out emergency disposal.

The invention relates to a measuring device for action delay of a dry contact of electronic equipment. The measuring device comprises detection cables, a signal detection circuit, a parallel interface, a computer and a switch, wherein the detection cables are arranged at the two ends of the dry contact of the electronic equipment to be measured, the detection cables are connected with the signal detection circuit, the output end of the signal detection circuit is connected with the computer through the parallel interface, and the switch is used for being connected with the computer and the electric equipment to be measured through different interfaces. The measuring device completely accords with information streams generated when the electronic equipment used in the power industry runs actually, can guarantee that the action delay of the dry contact of the electronic equipment putting into running meets technical condition requirements, avoids power system accidents caused due to the fact that the action delay of the dry contact exceeds the standard, and reduces life and property losses. Furthermore, the measuring device is high in measurement accuracy and simple and convenient to operate, can be used in a universal method for measuring the action delay of the dry contact of the electronic equipment used in the power industry, and has extremely wide application fields and prospects.

The invention provides a power grid accident pre-judgment method and system based on a stability control strategy table. The method comprises the steps of analyzing a regional power grid system protection stability control strategy table, and constructing a corresponding power grid system protection device model; generating a simulated fault based on a fault set in the power grid system and the real-time power grid data; and according to information of the simulated fault, the operation mode before the power grid accident and the tidal current size of the power transmission section, looking up the stability control strategy table, and pre-judging control measures and control quantity which should be taken. Through the scheme, online checking of a system protection stability control strategy, power system accident pre-judgment and switchable resource judgment can be realized, and stable and reliable operation of the power grid system is guaranteed.

The invention relates to a vehicle safety automatic notification system including an anti-theft device, at least comprising: an emergency switch, a system accident sensing device or a vehicle accident sensing device, a control system, a control circuit, a GPS module, a wireless local area networks device Bluetooth module, and an intelligent cellphone of an owner is combined with the control system; and the control system is provided with an integrated circuit (IC), and the integrated circuit senses, calculates, analyzes and manages vehicle status measured by the emergency switch and the system accident sensing device or the vehicle accident sensing device, transmits the signal to the control circuit according to the program command, drives an engine circuit, a loudspeaker warning circuit, a GSM communication module, the GPS module and the wireless local area networks device Bluetooth module to operate via the control circuit, and sends the signal out via the intelligent cellphone or an intelligent mobile device of the vehicle user so as to notify traffic accidents or vehicle theft or vehicle running positions.

A plant simulator which makes it possible to set factors which could invite a system accident and to simulate the process of occurrence of a system accident. The plant simulator has a plant monitoring and operation unit 300 which displays on a display screen parameters and the plant status computed by a plant simulation unit and, by using this display screen, gives the plant simulation unit the operation performed on the plant; and a simulation instructing unit 100 which, connected to a terminal screen, gives the plant simulation unit the setting of initial values necessary for simulation from this terminal screen and a demand instruction, which may be to demand discontinuation of the execution of simulation, the plant simulator simulating a system accident according to a control model and a plant model, further including a system accident factor database 504 in which action logics of system accident factors matching the control model are stored; a system accident factor selecting unit 500 having a selecting device for taking out data stored in this system accident factor database; and a system accident executing unit 400 which executes a system accident on the basis of data taken out of the system accident factor selecting unit, whereby the system accident is simulated.