Supraharmonics Measurement Based on Hybrid Online Measurement and Offline Analysis

In this paper, we design a novel measurement device based on online measurement and offline analysis for supraharmonics in the electric system. By exploiting the three-cycle sampling method in the online measurement, we intercept the applicable signals to reduce the computational error and improve real-time performance. To obtain a superior aggregation effect, the variable band aggregation method is adopted to be compatible with the different characteristics of equipment and the extra indicators are applied for supraharmonics. For developing the supraharmonics measurement device, we introduce the considerable function modules to implement the hardware and software design. Experiment results coinciding with the theoretical analysis demonstrate that the effectiveness of the designed supraharmonics measurement device.