EV Integration-Oriented DC Conversion of AC Low-Voltage Distribution Networks and the Associated Adaptive Control Strategy

Driven by carbon-neutral targets and transportation electrification, the widespread use of electric vehicles (EVs) has become an irreversible trend. However, low-voltage distribution networks (LVDNs) can face several challenges under high-penetration EV integration, including overloads, voltage violations unbalance issues. In this paper, integration-oriented DC conversion scheme associated adaptive control method for LVDNs is proposed, aiming at releasing more capacity EVs collaborative improvement above issues caused charging. Based on analyzing influence different charging piles connected to AC LVDNs, a three-phase four-wire proposed. The source converter (VSC) strategies aimed alleviating overload DTs, violations, are designed separately based modified sensitivity. Then, coordinated strategy on-load tap changer VSCs proposed considering simultaneous occurrence multiple power quality in hybrid AC/DC LVDNs. Case study verifies effectiveness methods, which maximum penetration LVDN increased from 85% 215% compared with LVDN.