摘要
介绍了基于差分方程的电压互感器二次导线电压降测量的新方法。该方法是利用一台测试仪,在互感器二次端和电能表端各测一次电压及电流,经过计算即可得到二次电压降。测试结果表明,该方法可降低PT二次回路的电压降误差,Uab由0.298%降为0.188%,Ucb由0.311%降为0.179%。符合SD 109-1983《电能计量检验规程》要求。
A new type of difference equation-based method for measuring the voltage drop in the second wire of voltage transformer was stated. During the process, a tester was applied to measure the voltage and current in the transformer second wire and the electric power meter respectively, and then the secondary voltage drop value was achieved by calculation. The test results show that the method can effectively reduce error probability as the Uab is reduced from 0.298% to 0.188%, Uab from 0.311% to 0.179% that conforms to the requirements in SD 109-1983 ＂Power Measurement and Inspection Rules＂.
出处
《绝缘材料》
CAS
2008年第4期65-66,70,共3页
Insulating Materials
关键词
电能
计量装置
差分方程
power
metering device
difference equation
