【摘要】 结合动态无功补偿装置运行、设计的特点和资料,介绍了正弦曲线拟合的基本概念,阐述了用正弦曲线拟合三采样值计算电流、电压、功率(有功、无功)、功率因数等电气量的计算方法以及应注意的问题。通过计算有效值、有功功率、无功功率等具体实例证明了该算法的正确性。该算法具有硬件简单、测量精度高、速度快等特点,希望该算法在动态无功补偿中发挥作用。更多还原

【Abstract】 Combining the operation,designing trait and other related information of dynamic VAR compensation,the article introduces the basic conception of sin curve fitting arithmetic,explains the computing method and the problems to be paid attention to calculate the current,voltage and power,power factor by applying the sine curve arithmetic to fit three sampling values.By calculating valid value of electric quantum,its correctness is proved by actual examples.Such arithmetic is of simple hardware,high measure precision and high speed.更多还原