曲线拟合在电气测量中的应用

The Application of Curved-fitting in Electric Measurement

导出了工频电压参数测量中非同步采样时电压、电流、有功功率、无功功率和功率因数的准确公式 ,解决了工频信号频率变化时采样测量精度降低的问题 ,并且引入了曲线拟合的思想 ,在计算较简单的情况下 ,有效的提高了测量精度 .

The precision formula of voltage, current,active power,reactive power and powerfactor in asynchronous sampling are derived.The problems of sampling accuracy of the measure with frequency signal varies are solved, and curved fitting method is introduced. Under simple calculation condition,the accuracy of the measurement is improved.