Active Voltage Quadrupler Rectifier-Based Ultra-High Boost Ratio Multidirectional Energy Router in 800 V DC Microgrids

In 800V DC microgrids, an energy router is essential for managing power distribution among the low-voltage photovoltaic (PV) panel, energy storage battery, and high-voltage dc link. Current solutions face challenges in simultaneously achieving high step-up ratios, multidirectional power flow, and maintaining high efficiency across broad input voltage and load ranges. To address these issues, this paper introduces a novel energy router featuring three key innovations. First, it combines an interleaved boost converter with an active voltage quadrupler cell (VQC), reducing voltage stress by 50% compared to conventional designs. Second, it employs an integrated magnetic design that utilizes leakage inductance, reducing magnetic volume by 36%. Third, it uses hybrid modulation, merging pulse-width modulation (PWM) and phase-shift modulation (PSM), to optimize switching and circulating losses while minimizing transformer turns and total power loss. Additionally, this configuration halves the voltage stress experienced by the MOSFETs on the high-voltage side relative to the dc link voltage. A 500W prototype was developed and tested, interfacing with a 15-25 V PV port, 40-50 V battery port, and 800 V dc link. Experimental results demonstrate a peak efficiency of 97.5% with stable operation under 0-100% load transitions. Comprehensive analysis, including dynamic studies (working modes switching, 95% load step changes) confirms the topology’s reliability in 800V DC microgrid applications.