摘要
指出传统的计算失压情况下的电能一般是采用平均计算的方法,即采用失压阶段的平均电压与平均电流的乘积以及失压时间进行相乘。但这种方法计算的误差比较大,在实际操作中也比较难以让电力用户信服。因此,提出了一种采用三次样条插值计算失压情况下电能表电能的方法,采用三次样条插值获得失压情况下的电流曲线及电压曲线,然后进行每段的电能逐步叠加经过实际检验,大大提高了计算精度,对于失压情况下电能量计算具有重要的现场应用意义。
Traditionally, when watt-hour meter is under the condition of voltage loss, electric energy is calculated by adopting average numerical value,which is the product of voltage loss time,average voltage and average current when the watt-hour meter is under the condition of voltage loss, but the error of this method is relatively large and it is not convincing for users. Therefore,a new method is put forward to calculate the electric energy by using cubic spline interpolation, through which, the author can get the current curve and voltage curve when the watt-hour meter is under the condition of vohage loss, then add the energy in each time section. Based on the check in practice, the calculating precision is greatly improved ,which is significant for calculating the energy when the watt-hour meter is under the condition of voltage loss.
出处
《山西电力》
2011年第2期28-30,共3页
Shanxi Electric Power
关键词
失压
电能
平均计算
三次样条插值
计算精度
voltage loss
electric energy
average numerical value
cubic spline interpolation
calculating precision
