公开(公告)号：US06456947B1

公开(公告)日：2002-09-24

申请号：US09698549

申请日：2000-10-30

申请人： Mark Gerard Adamiak ,  George Edmund Alexander ,  William James Premerlani ,  Emilie Thorbjorg Saulnier ,  Birsen Yazici

发明人： Mark Gerard Adamiak ,  George Edmund Alexander ,  William James Premerlani ,  Emilie Thorbjorg Saulnier ,  Birsen Yazici

IPC分类号： G01R3100

CPC分类号： H02H7/263 ,  G01R19/25 ,  H02H3/05 ,  H02H3/28 ,  H02H3/40 ,  H02H7/045

摘要： A method of detecting faults on a power transmission line system includes simultaneously measuring phase current samples at each phase of each transmission terminal; calculating real and imaginary phaselets comprising partial sums of the phase current samples; for each phaselet, calculating a respective partial sum of squares of each phase current sample; calculating the sums of the real and imaginary phaselets over a variable size sliding sample window; calculating real and imaginary phasor components from the phaselets and a sum of the partial sums of the squares over the sample window; using the sums of the real and imaginary phaselets, the real and imaginary phasor components, and the sum of the partial sums of the squares to calculate a sum of squares of errors between the phase current samples and a fitted sine wave representative of the real and imaginary phasor components; using the sum of squares of errors to calculate a variance matrix defining an elliptical uncertainty region; determining whether a disturbance has occurred, and, if so, re-initializing the sample window; and determining whether a sum of current phasors from each terminal for a respective phase falls outside of the elliptical uncertainty region for the respective phase.

摘要翻译： 一种检测输电线路系统故障的方法，包括同时测量每个发送终端各相的相电流采样; 计算包括所述相电流样本的部分和的实部和虚拟相位元; 对于每个阶段，计算每个相电流样本的相应部分平方和; 在可变尺寸的滑动样本窗口上计算实数和虚拟相位的和; 从相位图计算实部和虚部相量分量，以及样本窗口上的平方的部分和的总和; 使用实数和虚拟相位的总和，实相和虚相量分量，以及平方的部分和的和来计算相电流样本和拟合的正弦波之间的平方和之和，所述拟合正弦波表示实数和 假想相量分量; 使用误差平方和来计算定义椭圆不确定区域的方差矩阵; 确定是否发生干扰，如果是，则重新初始化样本窗口; 以及确定来自各个相位的每个终端的电流相量的和是否落在相位相位的椭圆不确定区域之外。

公开(公告)号：US06192317B1

公开(公告)日：2001-02-20

申请号：US09517088

申请日：2000-03-06

申请人： Birsen Yazici ,  John Raymond Krahn

发明人： Birsen Yazici ,  John Raymond Krahn

IPC分类号： G01R3108

CPC分类号： G01R31/1227 ,  G01R31/1272

摘要： Statistical methods of partial discharge analysis utilizing histogram similarity measures are provided by quality assessment and condition monitoring methods of evaluating high voltage electrical insulation. The quality assessment method is utilized to evaluate the quality of insulation within the electrical equipment. The condition monitoring method is utilized during normal operation of the equipment to identify degradation in the insulation and to predict catastrophic insulation failures.

摘要翻译： 利用直方图相似性测量法进行局部放电分析的统计方法由评估高压电气绝缘的质量评估和状态监测方法提供。 质量评估方法用于评估电气设备内的绝缘质量。 在设备的正常运行期间利用状态监测方法来识别绝缘中的劣化并预测灾难性绝缘故障。