An Alterable Structure Power Router with General AC and DC Port for Microgrid Applications

Abstract

This paper proposes an alterable structure power router (PR) topology which shares the ability of general Alternating Current (AC) and Direct Current (DC) port. This alterable structure PR aims to better implement the interconnections among micro-grids, renewable energy, and traditional grids. The PR’s converter structure is alterable according to the system power. Based on the operation analysis of the PR, the mathematic model of the power router is established and the relationship between switch states and port voltage is analyzed. According to the PR mathematical model, the control method is designed to realize current control in both AC and DC mode. With the proposed power router topology, the PR’s port can be used in both AC and DC situations, which saves the cost of traditional PRs and increases economic efficiency. The simulation and experimental results prove the good steady-state and dynamic performance of the proposed power router topology.

Energy router interconnection system: A solution for new distribution network architecture toward future carbon neutrality

“…Many studies have investigated topics related to ERs, such as practical topologies [31][32][33][34], control and energy management strategies [35][36][37][38][39][40][41], power routing algorithms [42][43][44], and test prototypes [45][46][47]. An ER topology with a variable topology was proposed in ref.…”

“…An ER topology with a variable topology was proposed in ref. [31] to solve a problem concerning various port attributes, and a mathematical model was established to analyse the relationship between its voltage and switching state. An ER topology with a transformer based on a fractional‐rated back‐to‐back converter for controlling the power flow was proposed in ref.…”