公开(公告)号：US5539651A

公开(公告)日：1996-07-23

申请号：US164331

申请日：1993-12-09

申请人： Zivan Zabar ,  Ralph Mancini ,  Leo Birenbaum

发明人： Zivan Zabar ,  Ralph Mancini ,  Leo Birenbaum

IPC分类号： H02J3/01 ,  G01R19/06

CPC分类号： H02J3/01 ,  Y02E40/40

摘要： The present invention relates to a system and method for determining the effects of linear and nonlinear loads on electrical power systems. The invention utilizes stored load characteristic data in terms of current spectra at predefined voltage values and network impedances to determine the voltage drop between an electrical substation bus and an electrical load bus. The actual load voltage is determined by an iteration technique which takes the difference between a collected substation voltage and the voltage drop and compares the result of the difference to an estimated load voltage. For each iteration the estimated load voltage is re-estimated until the difference result equals the estimated voltage, thereby determining the actual load voltage. Knowing the actual load voltage, permits determination of actual current and power values which are compared to collected substation current and power values. If the values are equal, the effects of the harmonics are known. If the values are not equal, load composition data is adjusted and the system repeats the above until the values are equal.

摘要翻译： 本发明涉及用于确定线性和非线性负载对电力系统的影响的系统和方法。 本发明根据预定电压值和网络阻抗的电流频谱利用存储的负载特性数据来确定变电站总线和电负载总线之间的电压降。 实际负载电压由迭代技术确定，该技术取得收集的变电站电压和电压降之间的差值，并将差值的结果与估计的负载电压进行比较。 对于每个迭代，估计负载电压被重新估计，直到差值结果等于估计电压，从而确定实际负载电压。 了解实际负载电压，允许确定与收集的变电站电流和功率值进行比较的实际电流和功率值。 如果这些值相等，那么谐波的影响是已知的。 如果值不相等，则调整加载组合数据，并重复上述系统，直到值相等。