Parameter Selection of General Signal Delay Superposition Operator Used for Real-Time Detection of Single-Phase Fundamental and Harmonics

To acquire quickly and accurately the real-time information of fundamental waves and specified harmonics is a prerequisite for harmonic control. Generalized delayed signal superposition operator (GDSS) is a numerical detection method for fundamental and harmonic real-time information, and its detection accuracy and real-time performance are closely related to the GDSS operator parameters. Based on the basic principles of the GDSS operator, this paper proposes a formula method and a search method for the selection of operator parameters and reveals the quantitative relationship between detection accuracy and real-time performance. According to the signal harmonic distribution characteristics, the formula method and the search method are employed respectively to obtain the GDSS operator parameters that reduce the computational complexity and improve real-time performance while meeting the requirements of detection accuracy. The simulation example shows that the proposed method is feasible and effective, and provides a further theoretical basis for the actual use of GDSS. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.