Multi-port multi-bus electric energy router topological structure suitable for power distribution network

Abstract

The present invention proposes an energy Internet-based multi-port multi-bus electric energy router topological structure and belongs to the power electronic converter field. The energy Internet-based multi-port multi-bus electric energy router topological structure can be widely applied to power transmission and distribution ends. The electric energy router topological structure is divided into three parts, namely, a high-voltage end, a middle stage and a low-voltage end. The electric energy router topological structure specifically comprises a high-voltage alternating current power transmission end and three kinds of direct-current bus output ends of which the voltage levels are 600 to 800V, 350 to 400V and 48V respectively; and the electric energy router topological structure further comprises ports such as single-phase alternating current load output ends, three-phase alternating current load output ends and renewable energy and energy storage component access ends; and the core part of the energy Internet-based multi-port multi-bus electric energy router topological structure is a modular multi-level converter and a dual-active bridge bidirectional DC/DC converter. With the energy Internet-based multi-port multi-bus electric energy router topological structure of the invention adopted, energy bi-directional flow and multi-port multi-bus design required by an electric energy router can be realized, the connection of loads, power sources and energy storage devices of different voltage levels and forms can be facilitated, electric energy transmission efficiency can be improved, and large-scale production can be facilitated.

Description

technical field [0001] The invention belongs to the application field of power electronics in smart grids, and relates to a multi-port multi-bus electric energy router topology. Background technique [0002] For a long time, my country's electric power industry has presented a highly integrated "centralized and vertical" model. Traditional power grids generally include four links: power generation, transmission, distribution, and electricity sales. It is a one-way flow; and the geographical location of our country determines the unbalanced energy distribution and long transmission lines, which leads to low utilization rate of electric energy and large loss. [0003] In recent years, the concept of distributed power generation has emerged, breaking the original top-to-bottom vertical mode. At the same time, with the emergence of renewable energy such as wind power and photovoltaic power generation and the maturity of corresponding technologies, the requirements for two-way pow...

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Problems solved by technology

[0006] The limitation of the existing power router topology is that there is no unified topology, and the access of renewable energy is not considered. Some topo...

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