Correlation Analysis for AC Power Smart Sensor

For AC power smart sensor, the test method of AC power characteristic parameters and power performance is proposed based on correlation analysis. It is compared and analyzed with traditional approach to obtain the parameters and power according to the definition. It is pointed out that the correlation analysis method can reduce the impact of interference in AC power signal on the test precision effectively, and then the system simplification, cost reduction and improvement of test performance such as real-time are resulted in with little additional computing time. Experiments results show that compared to the traditional way, the correlation-based approach can reduce the number of the sample data for test analysis by about two times and the noise amplitude can be permitted from less 3% to 12% of signal amplitude.