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30results about How to "Improve weak links" patented technology

Power system weak link identification method based on risk evaluation

The invention relates to a power system weak link identification method based on risk evaluation and belongs to the field of power system analysis. The method includes acquiring fault probability of elements of a power system, a future load curve of the power system, states of the elements and load of nodes of the power system; utilizing a minimum load shedding loss optimization model to judge the failure state of the power system and determining the optimum load shedding quantity of each node under each element sampling state; finishing calculation of risk indicators of the power system through repeated sampling and power system failure state judgment; conducting statistics on the weak link characteristic quantity corresponding to faults of generators and an electric transmission and transformation device, calculating five element weakness recognition indicators of the elements according to the risk indicators and the weak link characteristic quantity and finally sorting the recognition indicator values to recognize the weak link of a generator set and the electric transmission and transformation device. By means of the method, the weak link of the power system is improved, large-area power failure of the power system is prevented, and operation safety of the power system is improved.
Owner:TSINGHUA UNIV

Simulation method and system for simulating real network environment based on virtualization, electronic equipment and storage medium

The invention relates to the technical field of virtual network simulation, in particular to a simulation method and system for simulating a real network environment based on virtualization, electronic equipment and a storage medium. The simulation method comprises the following steps: starting to create a target range; setting basic information; setting topology information; creating resources; setting full-scene startup; storing the scene; and completing shoot range creation. According to the simulation method and system for simulating the real network environment based on virtualization, the electronic equipment and the storage medium, network attack and defense parameters such as a topological structure, the number of nodes and rule parameters can be configured according to needs; multi-mode drilling can be carried out to meet different application requirements, including red and blue confrontation, individual soldier drilling and equipment system verification; in the drilling process, the target range can support rapid deployment of different attack and defense scenes in the aspects of operation resources and management resources, so that safety evaluation is conducted on thetarget range in an omnibearing mode, and weak links are perfected in an emphasized mode.
Owner:BEIJING SAFE CODE TECH

Offshore wind farm cluster electrical system planning method

The present invention relates to an offshore wind farm cluster electrical system planning method. On the basis of providing an onshore power grid structure and all possible grid connection points, a specific access capacity of each grid connection point and onshore power grid expansion are optimized according to a total access capacity of an offshore wind farm cluster by using an artificial fish school algorithm; wind farm clustering is performed according to the access capacity of each grid connection point obtained through optimization at an upper layer, and offshore transformer substation locating and sizing is optimized by using a genetic algorithm; unified topological optimization is performed according to a transformer substation locating and sizing result at a second layer, to obtain a new onshore grid connection point capacity and expansion result, the new onshore grid connection point capacity and expansion result is redelivered to a fitness function of a second-layer geneticalgorithm, to guide offshore transformer substation locating and sizing, and repeated iteration is performed till the onshore power grid structure is no longer changed, wherein an output is an optimalsolution. Compared with the prior art, according to the method, both economical efficiency and a reasonable degree after onshore power grid expansion are considered, and an onshore power grid and anoffshore wind farm cluster are integrated, to optimize costs and benefits.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER +2

Method for automatically generating digital-analog conduit welding clamp intelligence system

InactiveCN101419635AImprove design efficiency and qualityImprove weak linksSpecial data processing applicationsOracle databaseFuel tank
The invention discloses a method for automatically generating a digifax duct welding fixture intelligent system, mainly comprising the following steps: large ORACLE database software is used for managing engineering data; COM components are used on a platform of CATIAV5R16 and the developing environment and an interface provided by VC6.0++ and CATIA are used for developing systematic modules for engineering management, fixture design, duct design, designing tools, two-dimensional engineering drawing, database management, and the like to create a virtually assembled three-dimensional welding fixture. According to the welding characteristics of part ducts of products, auxiliary fuel tanks, and the like, the method utilizes techniques of three-dimensional digital digifax, visible space digital virtual assembly, fixture rigidity calculation, interference simulation of loading space for welding parts, fixture structure analysis, and the like to improve the efficiency and the quality for the welding fixture design and weak links of frock digital design. Compared with conventional CATIA design, the efficiency is improved by about 60 percent, the design quality of the welding frock can be greatly improved simultaneously, and the repair rate of the welding frock is reduced by about 70 percent.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP

Hydraulic system component reliability test device and method including environment field

The invention relates to a hydraulic system component reliability test device and method including an environment field, and belongs to the technical field of hydraulic system component reliability tests. A monitoring device is fixed on the upper surface of a three-dimensional vibration platform. An electro-hydraulic servo device, a connection device and a hydraulic cylinder assembly are aligned through a base plate and fix the base plate to a support framework. A three-position four-way electromagnetic reversing valve and sensors are installed on the upper surface of the support framework. The hydraulic cylinder assembly and the three-position four-way electromagnetic reversing valve are connected through a connection oil pipe. A temperature and humidity control box assembly is installed on the upper surface of the three-dimensional vibration platform. Weak links in the hydraulic system are found out by the simulation of practical conditions, the dynamic force and static force loading tests and collision tests of the hydraulic system are completed through the electro-hydraulic servo device, so that corresponding parameters of faults are obtained, the design of the hydraulic system is facilitated, and the reliability of the hydraulic system is improved.
Owner:JILIN UNIV

Method for predicting and evaluating impact influence of passenger flow after large-scale activity on subway station

The invention provides a method for predicting and evaluating the impact influence of the passenger flow after a large-scale activity on a subway station. The method comprises the steps of establishing and solving an optimal travel behavior decision model of individual passengers from a large activity venue to a destination point at the end moment of a large activity based on an evacuation trafficnetwork, and obtaining an alternative travel scheme set of the individual passengers; constructing and solving a large-scale activity scattered individual passenger discrete travel decision-making model by utilizing a random utility theory based on the alternative travel scheme set to obtain the probability that the passengers select each alternative scheme; and calculating the total evacuated passenger flow volume borne by each urban rail transit station after the large-scale activity is finished. According to the method, the convenience of multi-mode traffic such as walking, shared bicycles, connection buses and taxies around a large activity venue is comprehensively considered, the optimal travel decision model and the discrete selection behavior model of scattered crowds are established, and the method has important significance for advanced response and effective organization of a subway system in the period of a large activity.
Owner:BEIJING JIAOTONG UNIV +2

Waterproof board device at connection position of curtain wall first layer and structure

The invention discloses a waterproof board device at the connection position of a curtain wall first layer and a structure. The waterproof board device comprises a waterproof board body, wherein the waterproof board body comprises a horizontal board and a first longitudinal board and a second longitudinal board which are perpendicularly connected with the horizontal board; the first longitudinal board is fixedly connected above one side of the horizontal board, and the second longitudinal board is fixedly connected below the other side of the horizontal board; the horizontal board, the first longitudinal board and the second longitudinal board are integrally designed; and the first longitudinal board is fixedly connected with a curtain wall cross beam, the second longitudinal board is fixedly arranged on the outer wall of the structure, and a waterproof coiling material is paved on the outer side of the waterproof board body. An organic waterproof whole is formed by the curtain wall system and the structure, so that the waterproof capacity of the connection position of the curtain wall board and the structure is enhanced, a great amount of manpower and material resources can be saved for the later maintenance of buildings, and the service life of the structure can also be prolonged to a certain extent; the whole construction process is convenient and fast as a whole, the problem of rainwater leakage at the weak position can be effectively avoided, and the weak links of water prevention of the curtain wall can be improved.
Owner:中铁十六局集团城市建设发展有限公司

An electrical system planning method for offshore wind power clusters

The present invention relates to an offshore wind farm cluster electrical system planning method. On the basis of providing an onshore power grid structure and all possible grid connection points, a specific access capacity of each grid connection point and onshore power grid expansion are optimized according to a total access capacity of an offshore wind farm cluster by using an artificial fish school algorithm; wind farm clustering is performed according to the access capacity of each grid connection point obtained through optimization at an upper layer, and offshore transformer substation locating and sizing is optimized by using a genetic algorithm; unified topological optimization is performed according to a transformer substation locating and sizing result at a second layer, to obtain a new onshore grid connection point capacity and expansion result, the new onshore grid connection point capacity and expansion result is redelivered to a fitness function of a second-layer geneticalgorithm, to guide offshore transformer substation locating and sizing, and repeated iteration is performed till the onshore power grid structure is no longer changed, wherein an output is an optimalsolution. Compared with the prior art, according to the method, both economical efficiency and a reasonable degree after onshore power grid expansion are considered, and an onshore power grid and anoffshore wind farm cluster are integrated, to optimize costs and benefits.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER +2

Anti-seismic redundancy analysis method for transformer substation system

The invention relates to an anti-seismic redundancy analysis method for a transformer substation system. The method comprises: dividing each component in the transformer substation system into a plurality of functional units, and determining redundant functional units in the transformer substation system and the total redundancy quantity of each redundant functional unit according to the value of a preset system performance index; then determining the actual redundancy number of each redundant function unit according to the actual redundancy demand, calculating the redundancy degree and the redundancy effect of each redundant function unit according to the actual redundancy number, and calculating the redundancy degree of the system according to the redundancy degrees and the redundancy effects of all the redundant function units; and finally, based on the association relationship between the system redundancy degree and the system redundancy effect, calculating the system redundancy effect according to the system redundancy degree, and then obtaining the system redundancy effect corresponding to the actual redundancy demand through calculation. The system redundancy is quantitatively analyzed, and the shock resistance of the system is evaluated; and weak links of the system can be improved according to quantitative analysis results, and the shock resistance of the system is improved.
Owner:INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION

A reliability test device and method for hydraulic system components including environmental field

The invention relates to a hydraulic system component reliability test device and method including an environment field, and belongs to the technical field of hydraulic system component reliability tests. A monitoring device is fixed on the upper surface of a three-dimensional vibration platform. An electro-hydraulic servo device, a connection device and a hydraulic cylinder assembly are aligned through a base plate and fix the base plate to a support framework. A three-position four-way electromagnetic reversing valve and sensors are installed on the upper surface of the support framework. The hydraulic cylinder assembly and the three-position four-way electromagnetic reversing valve are connected through a connection oil pipe. A temperature and humidity control box assembly is installed on the upper surface of the three-dimensional vibration platform. Weak links in the hydraulic system are found out by the simulation of practical conditions, the dynamic force and static force loading tests and collision tests of the hydraulic system are completed through the electro-hydraulic servo device, so that corresponding parameters of faults are obtained, the design of the hydraulic system is facilitated, and the reliability of the hydraulic system is improved.
Owner:JILIN UNIV

Identification Method of Weak Links in Power System Based on Risk Assessment

The invention relates to a power system weak link identification method based on risk evaluation and belongs to the field of power system analysis. The method includes acquiring fault probability of elements of a power system, a future load curve of the power system, states of the elements and load of nodes of the power system; utilizing a minimum load shedding loss optimization model to judge the failure state of the power system and determining the optimum load shedding quantity of each node under each element sampling state; finishing calculation of risk indicators of the power system through repeated sampling and power system failure state judgment; conducting statistics on the weak link characteristic quantity corresponding to faults of generators and an electric transmission and transformation device, calculating five element weakness recognition indicators of the elements according to the risk indicators and the weak link characteristic quantity and finally sorting the recognition indicator values to recognize the weak link of a generator set and the electric transmission and transformation device. By means of the method, the weak link of the power system is improved, large-area power failure of the power system is prevented, and operation safety of the power system is improved.
Owner:TSINGHUA UNIV

A method for using a waterproof board device at the joint position between the first layer of a curtain wall and a structure

The invention discloses a waterproof board device at the connection position of a curtain wall first layer and a structure. The waterproof board device comprises a waterproof board body, wherein the waterproof board body comprises a horizontal board and a first longitudinal board and a second longitudinal board which are perpendicularly connected with the horizontal board; the first longitudinal board is fixedly connected above one side of the horizontal board, and the second longitudinal board is fixedly connected below the other side of the horizontal board; the horizontal board, the first longitudinal board and the second longitudinal board are integrally designed; and the first longitudinal board is fixedly connected with a curtain wall cross beam, the second longitudinal board is fixedly arranged on the outer wall of the structure, and a waterproof coiling material is paved on the outer side of the waterproof board body. An organic waterproof whole is formed by the curtain wall system and the structure, so that the waterproof capacity of the connection position of the curtain wall board and the structure is enhanced, a great amount of manpower and material resources can be saved for the later maintenance of buildings, and the service life of the structure can also be prolonged to a certain extent; the whole construction process is convenient and fast as a whole, the problem of rainwater leakage at the weak position can be effectively avoided, and the weak links of water prevention of the curtain wall can be improved.
Owner:中铁十六局集团城市建设发展有限公司

Axial plunger pump of railway track switching system

The invention provides an axial plunger pump of a railway track switching system. The axial plunger pump comprises a pump body, an oil distribution disc, a pump housing, a needle roller bearing, a cylinder body, a plunger component, a transmission shaft, a swashplate structure, screws and an end cover; the pump body is connected with the pump housing by virtue of the screws; the oil distribution disc is arranged between the pump body and the pump housing; the cylinder body is connected with the inside of the pump housing in a support manner by virtue of the needle roller bearing; the plunger component is arranged inside the cylinder body; the cylinder body is connected with the plunger component; one end of the plunger component is connected with the swashplate structure in a pressing manner; the transmission shaft is fixedly connected with the pump body and penetrates through the pump body, the oil distribution disc and the cylinder body; the swash plate structure is connected with the end cover; and the end cover is connected with the pump housing through the screws, wherein the plunger component comprises a plunger body, a plunger head, a sliding shoe, an inner sleeve, an outersleeve, a steel ball, a spring and a return disc. Compared with a traditional technology, the axial plunger pump provided by the invention realizes remolding of a ball head and the sliding shoe and improvement of easily-abraded positions and effectively improves the weaknesses of a traditional design.
Owner:上海申福高压泵液压件有限公司
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