4 results about "Series impedance" patented technology

This invention relates to the field of power systems and their automation technology. It provides a method for constructing a traction network simulation model based on current distribution characteristics. The method includes: establishing multi-conductor transmission line equations based on Maxwell's equations, including Gauss's law and Faraday's law; deriving a chain-like network model of the traction network based on the multi-conductor transmission line equations and a chain circuit model with multi-conductor transmission lines as the backbone and randomly connected transverse elements; simplifying the chain-like network model to obtain a simplified series impedance matrix equation and a parallel admittance parameter matrix after conductor merging; and calculating the series impedance and parallel admittance values ​​using the simplified series impedance matrix equation and the parallel admittance parameter matrix after conductor merging. This invention improves the accuracy and applicability of traction network electrical simulation and signal analysis.

This invention relates to the field of startup surge suppression technology. Specifically, it relates to a low-loss startup surge suppression method. The method includes the following steps: S1, collecting the equipment load status and current-limiting device temperature before startup, and simultaneously acquiring historical startup data of the electrical equipment. Based on the equipment load status and the current-limiting device temperature, the historical startup data is classified into different status types. This invention uses a dual-loop architecture of current-limiting circuit and bypass circuit. Immediately after startup, the main circuit is switched to the pure copper bypass circuit, and the current-limiting circuit completely exits operation. There is no additional power loss caused by any series impedance, completely solving the problem of continuous heating and low energy efficiency caused by long-term series connection of traditional current-limiting components. Simultaneously, a standard startup current curve is generated based on historical successful startup data to accurately locate the optimal switching time and minimize the operating time of the current-limiting circuit.

This invention relates to the field of intelligent sensor technology, specifically disclosing a method for calibrating IGBT driver parameters based on intelligent sensors, comprising the following steps: S1, acquiring IGBT driver nodes; S2, generating a composite disturbance current command and injecting it into the IGBT driver nodes to acquire voltage response waveforms and current disturbance waveforms; S3, generating a disturbance admittance spectrum based on the voltage response waveforms and current disturbance waveforms; S4, calculating the equivalent series impedance and correcting the disturbance admittance spectrum to obtain the target spectrum; S5, fitting the target spectrum to an equivalent circuit model to extract the equivalent parameter vectors of the corresponding IGBT driver nodes; S6, calculating the parameter distance between the equivalent parameter vectors of different IGBT driver nodes on the same feeder branch, and performing collaborative calibration on all IGBT drivers on the branch when the parameter distance exceeds a set threshold. This invention can enhance the system's adaptability to parameter drift and environmental changes during long-term operation.