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508 results about "Performance estimation" patented technology

Electric power line lightning protection performance estimation method based on thunder and lightning parametric statistics

ActiveCN101315400AEvaluation results are reliableImprove ground lightning protection performanceElectrical testingLightning strokesEngineering
The invention relates to a method for evaluating the lightning protection performance of transmission lines based on the parametric statistics of lightning. The method comprises the following basic steps: firstly, the information of the transmission lines which require the lightning protection performance evaluation is given; secondly, the ground flash density and the probability distribution statistics of the lightning current magnitude within a specified period are performed to the given transmission lines; thirdly, the lightning-stroke trip-out rate in each section of the transmission lines segmented according to a pole tower within the specified period is calculated; fourthly, a reference value is set according to a design value, a specified value or an operation experience value of the lightning-stroke trip-out rate, and the time difference and the space difference of the lightning protection performance of the transmission lines are evaluated according to the lightning-stroke trip-out rate of each section of the transmission lines and a whole line within the specified period, wherein the lightning-stroke trip-out rate is obtained through the calculation in the step three. The method has the advantages that the evaluation to the lightning protection performance of the transmission lines is performed on the basis of the parametric statistics of lightning with time and space differences; the evaluation result of the method to the lightning protection performance of the transmission lines is more reliable, and has more pertinence; and the evaluation to the lightning protection performance of the transmission lines on different times and different spaces is realized.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST

Monitoring system and method for monitoring running performance of power grid system in real time

The invention provides a monitoring system and method for monitoring running performance of a power grid system in real time. The system comprises one or more monitoring computers used for receiving mass data flow including synchronization phasor measurement values of second-level timestamps, used for storing running performance data of an electric power system, configured to monitor reliability indexes, power gird operation indexes, electric power production indexes and electric power transmission indexes of a wide-area interconnected network, configured to monitor events in data flow of the wide-area interconnected network in real time and analyze and predict future operation conditions, configured to execute event logic detection, and configured to display event analysis results. The method includes the first step of receiving the mass data flow from the wide-area interconnected network, the second step of detecting data in the received data flow, the third step of conducting event analysis, the fourth step of conducting performance evaluation on the grid system, and the fifth step of visually displaying event related measurement results and event analysis results. By means of the system and the method, the managing and scheduling capacity of the whole electric power system can be remarkably improved, and running reliability of the electric power system is effectively ensured.
Owner:STATE GRID CORP OF CHINA +2

Inertial navigation alignment performance evaluation method based on main inertial navigation attitude variation quantity assistance

InactiveCN104807479AAccurate and precise estimateReduced maneuvering requirementsMeasurement devicesLinear motionTransfer alignment
The invention discloses an inertial navigation alignment performance evaluation method based on main inertial navigation attitude variation quantity assistance. The method comprises the following steps of implementing preheating preparation; performing navigation solution on a main inertial navigation system and a secondary inertial navigation system respectively; constructing a measurement equation of attitude variation quantity; constructing a performance evaluation measurement equation; performing Kalman filtration solution; performing reverse smoothing estimation; acquiring an attitude misalignment angle at a transfer alignment ending moment so as to realize alignment precision evaluation of transfer alignment of the inertial navigation system of a ship-borne weapon. The invention designs the inertial navigation alignment performance evaluation method based on the main inertial navigation attitude variation quantity assistance, linear motion information of GDPS position and speed is taken as main reference information, and the main inertial navigation attitude variation quantity is taken as auxiliary reference information, so that the requirements of accuracy evaluation on mechanical strength of a carrier can be reduced; integral output based on angular rate is taken as an observed value, so the influences on the inertial navigation alignment performance evaluation effect caused by external environmental interferences can be effectively inhibited, and the inertial navigation alignment accuracy evaluation performance of the ship-borne weapon can be improved.
Owner:JIANGSU HUAHAO MARINE ELECTRICAL APPLIANCE

Workshop layout method of discrete manufacturing system

The invention discloses a workshop layout method of a discrete manufacturing system. The workshop layout method comprises the specific steps: a system UI layer is used for recording workshop equipment and production information to a layout design platform; a model establishing layer is arranged; an inter-row equipment distribution mathematic model, an in-row equipment sorting mathematic model, an inter-procedure batch division mathematic model and a layout scheme performance estimation model are established respectively according to the recorded workshop information; a workshop layout optimization subsystem is arranged; a workshop layout design result estimation and display module is arranged. A user sends a layout design scheme to a server through module permission and workshop management staffs execute optimized results. The workshop layout method has the advantages that the defects that the workshop layout overall performance is reduced, caused by the fact that common layout optimization only considers block layout of a machining station, are avoided. Meanwhile, the optimal distribution of task amounts of an equipment workshop is considered under the condition that a plurality of sets of equipment of front and rear procedures are utilized, and the logistics transportation amount is further reduced by utilizing third-grade optimization.
Owner:HAIAN COUNTY SHENLING ELECTRICAL APPLIANCE MFG
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