DC residential energy router based on multi-port converter and control method thereof

Abstract

The invention discloses a DC residential energy router based on a multi-port converter and a control method thereof. The energy router is characterized in that the energy router is composed of four H bridge modules, two-way buck / boost converter modules BB1 and BB2, four external series inductors, and a high-frequency four-winding transformer; driving signals used to control on-off of full-control power devices in the converter modules BB1 and BB2 are obtained by means of pulse width modulation; and driving signals used to control on-off of full-control power devices in the H bridge modules are obtained by means of single phase shift modulation. The energy router integrates photovoltaic energy, stored energy, a power grid, and a residential load with different voltage grades. Two-way power flow between stored energy and the power grid is realized. Maximum use of renewable energy, reduction in power exchange with the power grid, charge and discharge based on stored energy, input source use priority, control on port voltages and power balance control in the system are realized.

Description

Technical field [0001] The invention relates to the field of DC houses, and is applied to DC houses integrating energy storage and renewable energy such as photovoltaics, and specifically relates to a multi-port converter-based energy router for DC houses and a control method thereof. Background technique [0002] Nowadays, with the increasing penetration rate of renewable energy, how to give full play to its value and benefits has become the focus of attention. The use of microgrids to integrate renewable energy and energy storage is currently a common way. Since most of the renewable energy output is direct current, the use of DC microgrid to integrate renewable energy will not require the DC / AC conversion required in the AC microgrid, thereby reducing area and cost, and reactive power issues, etc. . On the other hand, as one of the largest energy users, the use of renewable energy for power supply in residential buildings will help achieve energy conservation and emission re...

AI Technical Summary

Problems solved by technology

However, as far as the existing DC multi-port converters for residential use are concerned, either a non-isolated topology is adopted without considering the bidirectional ports contained in the topology, or an isolated topology is adopted without considering the multitasking control of the entire system, and Little research has been done on partially isolated topologies and their corresponding control methods

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