Stability Augmented Low Inertia Power Grids with Hybrid AC and DC Architectures

Next-generation power electronics feature cross-domain and multi-timescale characteristics and interact with both electric circuits (physical level) and communication networks (cyber level) to dynamically respond to real-time incidents. The low-inertia nature of today’s power systems entails technical concerns that may jeopardize system stability and impact grid services in both normal and contingent operating conditions. We focus on stability enhancement of inverter-dominated low-inertia power grids and deploy hybrid AC and DC architectures to enable flexible energy integration, with a special emphasis on advanced modeling and control (e.g., grid-forming capabilities), AI-aided active stabilization, and cyber and physical hardening of industrial inverters. The hybrid AC and DC architecture with inverter-centric solutions is designed for power grid operation, which is also applicable in other energy systems, such as electric shipboards, more- and all-electric aircraft, among others.

Resilient Power Systems with Dynamic Formation of Power Electronics Intensive Networked Microgrids

Grid modernization calls for a resilient framework to host diversified grid-interactive resources through central coordination and emerging grid-edge intelligence. To enable ultra-flexible grid operation in response to potential power outages and even natural disasters, we build a reconfigurable framework with a dynamic formation of inverter-intensive networked microgrids in response to all the phases of grid service restoration, with broad applicability in various target areas ranging from residential end-users to coupled transmission and distribution grids.

Solid-state Infrastructures with Versatile Grid-interactive Functionalities

Bulk grid infrastructures pose significant challenges and vulnerabilities in reliable and secure power grid operation, especially considering high maintenance costs and limited services that can be provided. To effectively and significantly enhance grid-interactive functions of conventional bulk grid infrastructures, we develop next-generation power-electronics-based solid-state power substations through advanced modeling, control, and modulation schemes. Meanwhile, we conduct a holistic cost-benefit analysis emphasizing enhanced reliability and versatile grid services.