8 results about "Transformation ratio" patented technology

The application relates to the technical field of metrological calibration, and discloses a multi-voltage-grade capacitor current tester calibration method based on unified transformation ratio. The method comprises the following steps: screening unified transformation ratio parameters meeting range constraints and error constraints, obtaining a ratio difference parameter of a corresponding electromagnetic voltage transformer, obtaining a capacitance ratio difference correction factor, calculating conversion coefficients under each voltage grade, determining a primary side capacitance setting value according to a preset primary side calibration capacitance value and the conversion coefficients, obtaining a secondary side output capacitance value of a standard capacitance tank, and collecting a displayed capacitance value and a displayed capacitance current value. The conversion coefficients between the unified transformation ratio and the theoretical transformation ratios of each voltage grade are established, single transformation ratio is used to cover multi-voltage-grade calibration, error components introduced by the ratio difference of the electromagnetic voltage transformer in the capacitance calibration process are reduced, and different transformation ratio equipment needs to be frequently replaced.

A power converter includes a piezoelectric transformer comprising a piezoelectric material and metalized electrodes that form two or more ports, at least one of the two or more ports being an input port having an input port surface area, at least one of the at least two ports being an output port having an output port surface area, wherein, the piezoelectric transformer has a physical characteristic of a geometry term H comprised of piezoelectric transformer dimensions at least one of input port and output port measurements, including and a voltage swing across the input port, a voltage swing across the output port, a charge utilization at the input port, a charge utilization at the output port, an input voltage, an output voltage, and a transformation ratio.

The invention relates to a rectifier arrangement for hydrogen electrolysis, comprising a transformer (1) with a primary winding (2) for connecting an input alternating voltage and a secondary winding (3) for providing an output alternating voltage, and comprising a rectifier (4) connected to the secondary winding (3) for generating an output direct current IDC and an output direct voltage UDC, wherein at the primary winding (2) of the transformer (1) a number N>1 of winding taps (5) are provided, and a load stage switch (6) connected to a controller (7) is provided which is designed for switching the winding taps (5) without interruption such that the transformation ratio of the transformer (1) can be switched via the controller (7) in N stages.

The present application belongs to the technical field of oil exploration, and relates to a method for identifying late-stage natural gas charging proportion. The method comprises the following steps: calculating a crude oil conversion rate; calculating a calculated value of a gas-oil ratio of a reservoir; establishing a corresponding relationship between the sum of the absolute concentrations of 3-methyl durene and 4-methyl durene and a measured value of the gas-oil ratio of the reservoir; taking the sum of the angle concentrations as a benchmark, adjusting the calculated value of the gas-oil ratio of the reservoir, so that the late-stage natural gas proportion is 0-99%, and obtaining a late-stage natural gas charging proportion identification chart; detecting the sum of the absolute concentrations of 3-methyl durene and 4-methyl durene in the crude oil to be evaluated; and based on the sum of the absolute concentrations and the measured value of the gas-oil ratio of the reservoir, according to the late-stage natural gas charging proportion identification chart, the identification of the late-stage natural gas charging proportion in the oil and gas reservoir to be evaluated is realized. The method is fast, intuitive and easy to operate, and improves the speed and accuracy of the identification of the late-stage natural gas charging proportion.

The present application relates to the technical field of power test equipment, and discloses a diesel generator set testing device and a control method, wherein the diesel generator set testing device is composed of a three-winding dry-type transformer containing taps, a double-winding transformer, a single bus suitable for multiple voltage grades and its power distribution device, and 10.5kV medium-voltage resistive, inductive and capacitive loads, has four kinds of transformation ratios, and thus can transform the output voltages of diesel generators with different voltages to 10.5kV voltage side through the transformer to perform resistive, inductive and capacitive load tests, reduces the need for different voltage loads of equipment and investment for testing diesel generators with different voltages, has good compatibility, significantly improves the utilization efficiency and economy of the testing device, the transformer adopts Yyyn0 connection group, guarantees the authenticity of harmonics in the test, is beneficial to reflecting the test performance and actual operation condition of the diesel generator, and the safety control automation degree of the testing device is high, effectively preventing operation safety risks.

The application provides a kind of based on hydrocarbon generation kinetics of source rock original total organic carbon parameter recovery and evaluation method.The method realizes the recovery of residual oil amount by light and heavy hydrocarbon correction, and with the kinetic parameters such as dry kerogen hydrocarbon conversion rate, oil cracking conversion rate and coke generation proportion calibrated by thermal simulation experiment as the constraint, builds the evaluation model of intra-source cracking oil and its material balance formula, restores and evaluates the original S2, intra-source cracking oil amount, coke carbon content and original total organic carbon, and further reveals the mechanism of total organic carbon evolution of first decrease and then increase.This application provides a complete closed-loop framework from experimental calibration to geological parameter recovery, which significantly improves the geological reliability of hydrocarbon source rock resource evaluation.The method overcomes the limitations of traditional methods in the interpretation of total organic carbon evolution in high mature area, improves the accuracy of residual oil amount recovery, and provides a scientific, repeatable and reviewable technical path for hydrocarbon source rock resource evaluation.

This invention discloses a method for identifying the transformer ratio of energy meters in low-voltage distribution transformer areas based on particle swarm optimization (PSO) algorithm, relating to the field of power system metering technology. The method includes: given that a predetermined number of three-phase user energy meters in the transformer area require transformer ratio correction, dividing the transformer area operation dataset into a training set for model training and a validation set for verification; defining the variables to be solved as the user identities requiring correction and their corresponding correct transformer ratio parameters; constructing a single comprehensive evaluation function to evaluate the correction effect of any given user identity and transformer ratio combination by integrating multiple transformer area operation features; employing a swarm intelligence optimization algorithm, using the user identity and transformer ratio combination as optimization variables and the comprehensive evaluation function as the optimization objective, and searching in the solution space by simulating swarm iterative optimization behavior; and outputting the globally optimal solution obtained by the search when the swarm intelligence optimization algorithm meets a preset convergence condition.

This invention provides a method for restoring and evaluating the original total organic carbon (TOC) parameters of source rocks based on hydrocarbon generation kinetics. This method restores residual oil content through light and heavy hydrocarbon correction, and uses kinetic parameters such as kerogen hydrocarbon generation conversion rate, crude oil cracking conversion rate, and coke formation ratio, calibrated by thermal simulation experiments, as constraints to construct an in-source cracking oil evaluation model and its material balance formula. This restores and evaluates the original S2, in-source cracking oil content, coke carbon content, and original TOC, thereby revealing the mechanism of the initial decrease followed by an increase in TOC evolution. This application provides a complete closed-loop framework from experimental calibration to geological parameter restoration, significantly improving the geological reliability of source rock resource evaluation. This method overcomes the limitations of traditional methods in interpreting TOC evolution in highly mature areas, improves the accuracy of residual oil recovery, and provides a scientific, repeatable, and verifiable technical path for source rock resource assessment.