异步采样有功功率表

Asynchronous sampling active power meter

介绍了一种以异步采样方式工作的有功功率数字表。与同步采样方式不同,这里采样频率不必满足同步采样条件,而只须根据Nyquist定理和被测信号中的谐波次数来确定。工作中该表对一个周波进行多点采样,然后根据改进的有功功率计算式算出该周波的有功功率值。该表能对被测信号的每个周波的有功功率进行测量,测量过程简单,且响应十分快速。

An asynchronous-sampling-based digital meter for active power measurement is demonstrated in this paper. Unlike the synchronous-sampling case, the sampling frequency here does not need to meet synchronous sampling requirement. Instead, It is determined just accor（ting to the Nyquist theorem and the orders of the harmonic components of the signal to be measured. This meter finds the active power of a cycle by using the multi-sampled data in this cycle and the improved active power formula. This meter can measure the active power of each cycle of the signal to be measured with the simple operation and the rapid response.