用于柔性直流配电的高频链直流固态变压器

发布时间：2018-01-19 04:07

本文关键词： 直流配电高压直流输电高频隔离直流固态变压器模块化变换器　出处：《中国电机工程学报》2014年25期 　论文类型：期刊论文

【摘要】：提出直流固态变压器(DC solid state transformer,DCSST)将作为柔性直流配网中的关键环节,以实现高压直流配电和低压直流微电网间电压和功率的灵活控制和快速管理。文中给出一种基于高频隔离的双向DCSST方案,其具有与传统隔离双向DC/DC变换器类似的传输功率模型;串联端的电压平衡与并联端的功率平衡等价;并且较易实现分布式、模块化和即插即用的软硬件结构。文中给出DCSST的拓扑结构、工作模式、传输功率特性、控制和管理策略、设计和实现方法;在此基础上,基于SiC功率器件,搭建用于柔性直流配网的DCSST样机,验证控制和设计方法的正确性和有效性。随着柔性直流输配电的快速推广,DCSST具有较大的应用前景。
[Abstract]:It is proposed that DC solid state DC SST will be the key link in the flexible DC distribution network. In order to realize the flexible control and fast management of voltage and power between HVDC distribution and low voltage DC microgrid, a bidirectional DCSST scheme based on high frequency isolation is presented in this paper. It has a transmission power model similar to the traditional isolated bidirectional DC/DC converter. The voltage balance at the series end is equivalent to the power balance at the parallel end. And it is easy to implement distributed, modular and plug and play software and hardware structure. The topology, working mode, transmission power characteristic, control and management strategy, design and implementation method of DCSST are given in this paper. On this basis, based on SiC power devices, the DCSST prototype for flexible DC distribution network is built to verify the correctness and effectiveness of the control and design methods. With the rapid spread of flexible DC transmission and distribution. DCSST has great application prospect.
【作者单位】：清华大学电机工程与应用电子技术系;深圳供电局有限公司;
【基金】：国家863高技术基金项目(2013AA050104)~~
【分类号】：TM42
【正文快照】： 0引言随着功率半导体技术的发展,直流输配电的线路造价低、电能损耗小、供电可靠性高、储能和新能源发电系统接入成本低等优点变得越来越突出,使得直流输配电成为各国的一个研究热点[1-6]。在直流配电网中,为了充分发挥分布式能源的效能,直流微电网将是最主要的运行方式[6-8]

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