Energy router device applied to intelligent distributed energy network

Abstract

The invention relates to an energy router device applied to an intelligent distributed energy network. The energy router device comprises an A unit being a three-phase pulse width modulation (PWM) bidirectional rectification unit, a B unit being an isolation-type bidirectional soft switch Cuk conversion unit, a C unit being a dual-active DC / DC conversion unit, a D unit being a three-phase four-wire soft switch inversion unit, an E unit being a soft switch single-phase full-bridge bidirectional inversion unit and an F unit being a photovoltaic Boost conversion unit and also comprises a first DChigh-voltage bus and a second DC low-voltage bus, wherein the dual-active DC / DC conversion unit comprises a closely-coupling high-frequency transformer, soft switching of each unit can be achieved byan auxiliary circuit or a control strategy, the energy loss and the loss of a switch tube device are greatly reduced. The distributed energy network is divided into three layers of power grid tree-shaped architectures by the intelligent distributed network technology, and the router is applied to a power distribution network and a micro power grid to complete different functions.

Description

technical field [0001] The invention belongs to a core power electronic device for solving information exchange and electric energy sharing between the energy Internet and a distribution network in the application of the energy Internet; in particular, it relates to an energy router device applied to an intelligent distributed energy network. Background technique [0002] Energy is an important material basis for economic growth and social development, and the most important source of power to change human living standards and improve human quality of life. With the rapid reduction of non-renewable energy sources and the increasingly serious living environment, the sustainable development of society no longer relies solely on a single form of energy, and the diversified structure of today's energy sources is becoming more and more obvious. The forms of energy carriers required by human production and life are becoming more and more diverse, such as electric energy, heat ener...

AI Technical Summary

Problems solved by technology

[0003] At present, due to its relatively backward topology, the existing energy routers have small power capacity, can provide a relatively single voltage level, have large limitations in energy flow and form, and have low efficiency.

Traditional energy routers have a single control method, only from the perspective of controlling grid-connected voltage stability. At this time, the effect of solid-state transformers is only equivalent to low-loss traditional transformers, and cannot achieve coordinated control of energy; it is different from traditional solid-state transformers when grid-connected , distributed energy is only connected to the grid from the low-voltage DC bus

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