The vulnerable areas of voltage sag corresponding to each voltage limitation are determined for different short-circuit faults of power system with arbitrary network parameters. 对任意给定网络参数的电力系统,可确定各种短路故障情况下不同电压限值对应的电压暂降凹陷域。
Various short-circuit parameters have been calculated in combination with the front-end of diesel generator power supply and distribution system of a Data Center which is give a reference to the readers. 并结合某数据中心的柴油发电机供配电系统前端部分的计算给出各种短路参数,以此供大家参考和讨论。
Finally, the headwaters of harmonic current and its harms to power system are discussed, the influences of harmonic currents to short-circuit verifying are analyzed, some parameters are gained according to the analyse on vibration spectrum of the electrodynamic stress. 最后,讨论了电力系统谐波的产生原因及其危害,分析了电力谐波对短路动稳定校验的影响,通过对含有谐波的短路电动力的频谱分析,得到相应的动稳定校验参数。
A quick detecting approach based on linear adaptive linear neurons called Adaline for short-circuit current parameters and the moment of arc extinguishing at current zero point is presented. 该文基于自适应神经元,给出了一种真空断路器同步开断短路电流时快速提取短路电流参数,预测电弧熄灭时电流零点的方法。
According to the analytical conclusion on the short-circuit current level of the East China Power Grid, the design of parameters and installation location of the series reactors were analyzed preliminarily. 根据华东电网短路电流水平的分析结论,对串联电抗器参数设计和安装地点进行了初步分析。
The measurement principle of short-circuit test current is briefly expounded in this paper. The error of the measurement system is analyzed, and the selection on main parameters of the measurement system is also introduced. 简述了短路试验电流的测量原理,分析了测量系统的误差,介绍了测量系统主要参数的选择方法。
According to the mechanism analysis of short-circuit process, characteristic parameters are extracted from electrical signals ot welding process by statistical analysis method with transfer period as the basic analysis unit, in which the process steadiness is reflected by variation coefficient. 在分析短路过渡飞溅形成机理的基础上,以过渡周期为基本单元,采用统计分析方法从焊接过程电信号中提取特征参数,基于变异系数的分析方法反映了过程的均匀程度。
The testing results and the calculating results of the perameters such as no-load loss, no-load current and short-circuit impedance of several 240MVA/ 220kV double-winding step-up transformers are compared and analyzed. The experienced coefficients of the parameters are given. 对几台240MVA/220kV双绕组升压变压器的空载损耗、空载电流和短路阻抗这几个重要参数的试验数据和设计计算值进行了比较与分析,得出了这些参数的一些经验系数。
The aerial mode component of traveling waves has been found appeared in the single-phase-to-ground fault and the phase-to-phase short-circuit fault. Thus the aerial mode component with stable parameters can be adopted as measurement signal for different fault types to locate the fault with two-terminal traveling wave locating method. 分析发现,线路单相接地和相间短路故障都产生行波线模分量,因此对各种类型故障都可采用参数稳定的线模分量作为测量信号,利用可靠的双端行波测距法测量出故障点位置。