Generic Derivation of Optimal Architecture for A Resilient Microgrid with Graph Theory

Abstract

A resilient microgrid for high-surety power, known as Super Uninterruptable Power Supply (Super UPS), is an evolution of traditional UPS. It consists of multiple sources and multiple energy storage components. Besides high efficiency and low cost, reliable power conversion architecture is required. In this paper, a systemic and machine-based way to derive the optimal power conversion topology for the high-surety power supply with multiple sources and energy storage components is investigated. First is the generation of power supply architectures. The architectures are generated and the reasonable ones are selected based on their connectivity. Second part is the evaluation algorithm including cost evaluation, efficiency evaluation and availability evaluation of a given architecture. After evaluating tens of thousands of topologies of architectures, the optimal architectures can be selected. Finally, taking a real Super UPS as example, the proposed method is applied to find the optimal architectures.