278 results about "System analysis" patented technology

A combiner box is used to collect direct current from solar panels or other energy sources. The combiner box integrates all means necessary for ground fault detection, current monitoring, voltage monitoring, and power monitoring. The combiner box may include a communication interface suitable for Web enabled monitoring, electronic notifications of system status, and/or remote control of system functions. In one embodiment, the combiner box uses integrated circuits and printed circuit board technology to achieve new efficiencies in manufacturing, installation and system analysis at the string level. A separate hand piece may be used by installers to test the performance of the combiner box, installation of the solar panels, performance of the solar panels and connections between the solar panels and the combiner box.

A method and apparatus for converting Direct Current (DC) to Alternating Current (AC). The method comprises performing system analysis on at least one of a DC current, DC voltage, or an AC voltage; utilizing the system analysis for selecting at least one conversion parameter; and converting DC to AC utilizing the at least one conversion parameter.

An arc fault detector system detects arcing faults in an electrical distribution system by monitoring one or more conductors and producing an input signal representing one or more electrical signal conditions in the circuit to be monitored. This input signal is processed to develop signals representing the electrical current flow through the monitored circuit and broadband noise signal components. The system analyzes these signals to determine whether an arcing fault is present, and if so, outputs a trip signal which may be used directly or indirectly to trip a circuit breaker or other circuit interruption device.

A vehicle system structure vibration and noise transmission path detecting system belongs to the technical field of automobile design. In the invention, a vehicle system analysis model building module builds incentive related bus, vehicle structure and acoustic cavity models and sets up a vehicle system analysis model; a vibration or noise response spectrum acquiring module acquires the vehicle structure vibration or passenger indoor structure noise response analysis; a transfer path power calculating module calculates the transfer power of all transfer paths and the total power transferred to the vehicle; a main transfer path detecting module calculates and orders the contribution of all the transfer paths, and identifies the main transfer paths; an optimized design module identifies the main influential factors for transfer of the power flow of the main transfer paths, applies an optimized design method to improve relevant bus characteristic parameters and structure types, and verifies the parameters in the vehicle system or the vibration absorbing and noise reducing effect after structure improvement. The vehicle system structure vibration and noise transmission path detecting system can improve the accuracy of transfer path identification and possibility of effective control to the transfer paths.

A method for reducing interference, comprising receiving a wideband signal, having at least one large amplitude component; adaptively modifying the wideband signal with respect to at least one high intensity component without substantial introduction of non-linear distortion, while reducing a residual dynamic range thereof; digitizing the modified wideband signal to capture information describing at least the high intensity signal at a sampling rate sufficient to extract modulated information present within the wideband signal at an upper limit of the band. The system analyzes a spectral characteristic of the wideband signal; and extracts adaptation parameters for the adaptive filtering. The system therefore provides both large net dynamic range and wideband operation. Preferably, the digitizer and filter, and part of the spectral characteristic analyzer is implemented in using superconducting circuit technology, with, for example low temperature superconducting digital signal processing components, and high temperature superconducting analog filtering components.

A blood coagulation system analysis device capable of analyzing a blood coagulation system with high accuracy, and a method and a program for analysis of a blood coagulation system are proposed.

The blood coagulation system is observed as a temporal change in permittivity before the viscoelasticity manifestation timing (timing at which blood starts to clot from the viewpoint of viscoelasticity (in greater detail, timing at which active polymerization of fibrin monomers starts)). A permittivity of blood which is positioned between a pair of electrodes is measured at predetermined time intervals after the anticoagulant effect acting on the blood is ended, and from the measurement result, a degree of the action of the blood coagulation system is analyzed.

The invention relates to a method for detecting and positioning the leakage of an oil-gas pipeline by utilizing an autonomous navigation robot. The method comprises a robot pipeline line-tracking detection method and a terminal computer detection positioning method; marking lines and correcting nodes are painted on the road surface near the pipeline along the axial direction of the pipeline; the robot navigation system adopts the photoelectric coding and correcting node identification method for navigation and line-tracking detection; a data acquisition combiner is formed by an ultrasonic sensor and a smell sensor to acquire a signal of the oil-gas pipeline, the signal passes an amplifying-filtering circuit and a control module, undergoes analog/digital conversion, modulated by a wireless communication module and sent to the computer; analytic software of the system adopts an algorithm combining the adaptive fuzzy noise detection smoothing algorithm and the multi-scale Gaussian filter algorithm to process data of ultrasonic strength and gas strength; and when the two signals are received at the same time and both higher than the threshold values, the leakage of the pipeline can be determined, and the alarm rings and the leakage can be positioned. The method is applicable for the line-tracking detection and leakage positioning of the oil-gas pipeline in an underground comprehensive pipe ditch.

The present invention provides systems, methods, screens, reagents and kits for optical system analysis of cells to rapidly determine the distribution, environment, or activity of fluorescently labeled reporter molecules in cells for the purpose of screening large numbers of compounds for those that specifically affect particular biological functions.

The invention relates to a large-grid wide-area asynchronous control method, which belongs to the field of emergency control of power systems. The method comprises the following steps of (1): real-time state computation of a main network frame of a wide area measurement system (WAMS)-based power grid, which is to eliminate the false and retain the truth through data pre-treatment, inhibit or eliminate noises to the largest extent, and highlight the useful information of the wide area measurement system in a grid dynamic process to provide characteristic quantity for stable analysis and control; (2) real-time analysis of stability of grid power angle, which is to detect and predict asynchronous process of the system based on the synchronous phasor of the integral main power grid by combining a system analysis method, and find out an asynchronous section in space; and (3) presentation of a coordinate control strategy for asynchronous disconnection, which is to present a backup disconnection control measure when the asynchronous section deviates to the section which is not controlled by disconnection and guarantee reliable disconnection when the large-grid becomes asynchronous. According to the method, a WAMS-based wide area asynchronous emergency control is provided, the running state of the power system can be monitored and controlled in real time, possible power angle instability of the power system can be predicted, the chain reactions of large-grid resistance is guaranteed, and influences of grid accidents on national economy and people's live are avoided.

A converter station insulating co-operating design method of a high-pressure direct-current power transmission system belongs to a high-pressure direct-current power transmission system analyzing method, and aims at simplifying calculating working capacity, avoiding excessive man-made interference, and guiding users to highly-effectively finish insulating co-operating analysis. The converter station insulating co-operating design method comprises the lightning arrester configuration step, the system analysis step and the insulating co-operating step. The converter station insulating co-operating design method greatly simplifies the calculating working capacity of insulating co-operating analysis, avoids excessive man-made interference factors of users, and guides users to highly-effectively finish insulating co-operating analysis through a guiding mode.

The invention discloses a neutral network theory-based non-linear system adaptive proportional integral control method. The method comprises the following steps: in a first step, a mathematical model for a non-linear system is built; in a second step, a smooth function is used for approximating a non-smooth performer saturation function; in a third step, a neutral network adaptive proportional plus integral controller is designed for control. According to the method disclosed in the invention, as for a non-linear system with input saturation, the smooth function is used for approximating the performer saturation function, a BLF is referenced, that neutral network input is maintained in a bounded compact set range can be ensured, and normal operation of a neutral network can be ensured; compared with a conventional PI gain adjustment, an adjustment method put forward in the invention is advantageous in that 1) proportion integral gain of the PI controller is not a fixed constant but a time variant; 2) proportional gain and integral gain are not designed individually but associated with each other via a certain coefficient, and therefore system analysis can be facilitated; 3) the method has certain robustness for nondeterminacy and input saturation of the system.

The invention discloses a kilowatt-level ship energy system test platform based on composite energy combined grid power generation. The kilowatt-level ship energy system test platform based on the composite energy combined grid power generation comprises a main distribution board, a composite energy combined grid power generation device, a left spiral distribution board and a right spiral distribution board, wherein the composite energy combined grid power generation device, the left spiral distribution board and the right spiral distribution board are respectively connected with the main distribution board. The test platform further comprises an intelligent comprehensive management system which conducts optimizing configuration of the composite energy operation process, system analysis and monitoring, safety control, analog simulation and asset appraisal of a whole life circle of power generation, distribution, transformation and utilization of the whole system test platform. The composite energy combined grid power generation device comprises a dual-fuel power generation unit, an LNG gas turbine generation unit, a photovoltaic combined grid power generation device, a wind power combined grid power generation device, a fuel battery combined grid power generation device, a shore connection box, an energy feedback power generation unit, a sail simulating auxiliary pushing device and a power pushing device, wherein the dual-fuel power generation unit, the LNG gas turbine generation unit, the photovoltaic combined grid power generation device, the wind power combined grid power generation device, the fuel battery combined grid power generation device, the shore connection box, the energy feedback power generation unit, the sail simulating auxiliary pushing device and the power pushing device are respectively connected with the intelligent comprehensive management system. The intelligent comprehensive management system serves as a center and various types of clean energy application technologies are integrated.

The invention discloses an insulative matching method for an intelligent power distribution system based on a flexible direct current. The topological structure, the mode of operation and the mode of malfunctions of the intelligent power distribution system based on the flexible direct current are comprehensively analyzed by the following steps: carrying out system analysis; configuring a lightning arrestor; carrying out simulating calculation of an overvoltage; setting insulative match. On the basis, the lightning arrestor is initially configured for the system and simulating calculation of overvoltage is conducted by establishing an inner overvoltage calculation model and a lightning overvoltage calculation model of the system so as to adjust the configuration of the lightning arrestor and the accomplish insulative match of equipment of the system, so that the system cost is the minimum while the system safely and stably operates. The scheme can be used for guiding related technical staff to efficiently carrying out insulative match analysis of a flexible direct current power distribution system.

The invention, which belongs to the field of precise modeling and control optimization of the hydro electric generating set of the power system, discloses a fuzzy fractional order PID control method for a speed regulating system of a pump storage group. On the basis of a fractional calculus and a fuzzy control theory, a fuzzy fractional order PID controller for a pump storage group is established; modeling of a speed regulating system of the pump storage group is carried out, wherein a regulator model, an approximate elastic water hammer model of a conduit system, a total-characteristic-curve-based pump turbine model, and a generator and load model are established; and then a controller parameter is optimized by using a provided parallel gravitation searching algorithm. According to the control method, requirements of hydroelectric energy system simulation, power system analysis, and optimized pump storage group control can be met to the greatest extent.

The invention discloses a road network traffic improvement scheme efficiency assessment method based on data envelopment analysis. Step one: an assessment index is quantified and acquired and preliminary road network improvement alternative schemes are formed; step two: the road network improvement alternative schemes are selected; that is to say, the road network improvement alternative schemes are effectively sequenced based on data envelopment analysis; and an optimal road network improvement scheme is obtained. Road network operation efficiency is assessed via adopting a "more input more output" system analysis idea by aiming at multiple schemes for road network updating. A road network operation efficiency assessment index system is established based on principles of representativeness, objectivity and availability. Besides, the assessment index is divided into an "input" type index and an "output" type index, and an assessment model of road network operation efficiency is established by applying data envelopment analysis (DEA). Calculation is performed by adopting a C2R model in the DEA method so that relative effectiveness and relative efficiency values among all the road network updating schemes are obtained and effectiveness sequencing of all the schemes is obtained.

The invention discloses a method for evaluating the insulation performance of a power cable in a stage with the voltage being 35kV or below 35kV. The method comprises the steps of determining the power cable which is in need of carrying out insulation performance evaluation and planning to carry out power failure detection on a section of cable circuit by combining with an overhaul plan of electrical devices which are connected with the power cable; disconnecting the section of the cable circuit with the electrical devices at two ends and ensuring a safe distance between the section of the cable circuit and adjacent electrical devices; applying oscillation wave voltage to a tested cable through a dedicated detection device and carrying out local discharge detection on the cable circuit; carrying out system analysis on a local discharge detection result by comparing a cable path and a position laying situation of an intermediate joint; meanwhile, carrying out effective evaluation on the insulation performance of the cable circuit by combining the size and the generation position of local discharge capacity of the cable circuit. According to the method disclosed by the invention, effective evaluation is carried out by carrying out the oscillation wave local discharge detection, safe and reliable running of a power grid is ensured, and the problem that a method for accurately mastering the insulation performance of the power cable in the stage with the voltage being 35kV and below 35kV is lack at present can be better solved.

The invention belongs to the field of petroleum chemical industry and discloses a refinery device operation cycle expert decision-making system and method based on reliability analysis. According to the decision-making method, based on function, function fault, fault mode and fault result analysis of a refinery device, the probability statistics is applied to obtain the safety and reliability dataof the refinery device, and a refinery device system analysis platform is established; the states of each system, equipment and part of the refinery device are judged, and a scheme with the need of preventative maintenance, regular maintenance, improvement or redesign is determined; and equipment maintenance, inspection, an inspection cycle and means are determined further, and finally a practical, reasonable and scientific maintenance plan or maintenance program or maintenance strategy package is made. Through establishing a data information analysis platform of equipment basic data and maintenance data, a refinery device long cycle data analysis model is constructed, and a long cycle dynamic maintenance strategy task package suitable for the device is formed.