| Title |
Performance Comparisons of Virtual DQ Transformation Methods for Voltage Oriented Control in Single-Phase PWM Rectifier Employing Spread Spectrum Modulation |
| Authors |
Chang-Min Lee ; Jee-Hoon Jung |
| DOI |
https://doi.org/10.6113/TKPE.2026.31.2.163 |
| ISSN |
1229-2214(pISSN), 2288-6281(eISSN) |
| Keywords |
OSG(Orthgonal Signal Generation); Single-phase PWM rectifier; SSM(Spread Spectrum Modulation); THD(Total Harmonic Distortion); VOC(Voltage-Oriented Control) |
| Abstract |
Single-phase PWM rectifiers, which are used to improve the power factor and enable bidirectional power flow control for stable grid operations, have increasingly been important in inverter-based resources. However, high-speed switching generates EM noise, which can be mitigated by spread spectrum modulation (SSM). While effective for reducing EM noise, the SSM can increase the THD and distort current control. This study compares the impact of orthogonal signal generation (OSG) methods, including the use of time delay (TD), an all-pass filter, and a second-order generalized integrator (SOGI), on a virtual DQ transformation under SSM operation via voltage-oriented control. The experimental results with a 2 kW PWM rectifier prototype demonstrate that the SOGI achieves the lowest THD without the SSM, whereas the TD provides the most robust performance under the SSM. This study offers insights into OSG selection for EMI-compliant PWM rectifiers. |