用电压偏差选择低压架空线截面应注意的问题

电力线路末端电压偏差一般按系统标称电压进行计算,正常情况下计算结果能满足工程设计的需要.但是该方法计算的结果随着末端电压偏差的增大,计算结果与实际之间的误差也在迅速增大,因此对末端电压偏差要求可以在-10%以内的场所供电的线路进行计算时,其计算误差可能不能满足工程设计的需要.笔者根据一例工程实例分析了误差增大的原因并提出了解决方案.

Noticed Issues of Selecting Conductor Cross-section of Low-voltage Overhead Line by Voltage Deviation

Terminal voltage deviation of power line generally calculated by system nominal voltage. Under the normal circumstance,the calculation result can meet the demand of engineering design. But with the incr-easing error of terminal voltage deviation,the calculating error between the calculating result of using this method and the actual result is quickly enlarging. When we calculate terminal voltage deviation of low-voltage overhead line within the range of-10% calculating error,the calculating result may be not meet the demand of engineering design. The reasons of calculating error augmentation are analyzed and the solutions are also offered in this article.