Simulation comparisons on the detection performance of the direct computation and hardware circuit-realized adaptive methods

Abstract

Direct computation method (DCM) and hardware circuit-realized adaptive method (HCAM) are two typical detection methods for harmonic and reactive currents. DCM has a high detection precision, whereas HCAM primarily uses adaptive noise-canceling technology for detection, so it is intrinsically adaptive. In order to determine whose detection performance is better especially in actual applications, simulation comparisons are conducted. The results indicate that the detection precision and dynamic performance of DCM are better than those of HCAM under ideal conditions. The detection precision of DCM is better than that of HCAM when the power supply frequency fluctuates, and the power supply voltage has no distortion. On the contrary, the detection precision of DCM is lower than that of HCAM when the power supply frequency has no fluctuation, and the power supply voltage distorts. The detection precision of DCM is lower than that of HCAM in actual applications.