基于电力电子变压器的电能路由器研究

Study on the Power Router Based on Power Electric Transformer

电能路由器不仅需要为不同的分布式电源和不同类型负载提供灵活多样的电气接口,还需要能实现能量的多向流动和对功率流的主动控制。电力电子变压器以其灵活控制的优点,不仅可以灵活提供交直流母线接口,更可以通过电力电子变换技术和高频变压器实现电压变换和能量双向传递,满足电力系统能源路由的要求。本文提出一种基于电力电子变压器交直流模块化的能量路由器拓扑,便于低压交直流配电网接入、配备大规模储能系统,实现功率流的控制。在此基础上,设计了该能量路由器的控制策略,分析其功率分配特性及参数设计。最后通过PSCAD仿真验证了本文所提拓扑结构和控制策略的正确性和有效性。本文为电能路由器的设计和实用化提供了参考。

Power router not only needs to provide different kinds of electrical interfaces for distributed power supply and different loads,but also needs to be able to realize multidirectional flows of energy and active control of power flow.With the advantage of flexible control,power electronic transformer,not only can provide AC/DC bus interface,more can realize voltage transformation and bi-directional energy transfer by use of power electronic transform technology and the high frequency transformer,which meet the requirements of the power router.This paper presents an ac/dc modular power router topology based on power electronic transformer,which has the advantages for the access of low voltage ac/dc distribution network and is equipped with large-scale energy storage system to realize the control of power flow.On this basis,the control strategy of the power router is designed and the power distribution characteristics and parameter are analyzed.Finally,the correctness and validity of the proposed topology and control strategy are verified by PSCAD simulation.This paper provides a reference for the design and practical use of the power router.