中压配电网用10kVac-750Vdc/1MVA电力电子变压器功率密度影响因素研究  

Power density analysis of 10kVac-750Vdc /1MVA power electronic transformer/ solid-state transformer for medium voltage distribution grid

作　　者：李子欣[1] 高范强[1] 徐飞[1] 楚遵方[1] 马逊[1] 孙湛冬 罗永捷 王平[1] 李耀华[1] 

机构地区：[1]中国科学院电力电子与电气驱动重点实验室中国科学院电工研究所,北京100190

出　　处：《电工电能新技术》2016年第6期1-6,共6页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金青年基金项目(51207151);国家电网公司科技项目(SGRIPGKJ[2013]148)

摘　　要：对面向10k V配电网的电力电子变压器(PET/SST)来说,其主要功能是在完成高低压侧电气隔离的前提下实现对电能/电功率的双向流动控制。为了提高功率密度,目前10k V配电网用PET/SST主要通过高频电力电子变换器+高频变压器的方案实现。本文结合研制的10k Vac-750Vdc/1MVA电力电子变压器样机实测数据,详细分析了影响中压配电网PET/SST功率密度的多种因素,指出了影响PET/SST功率密度提高的关键瓶颈问题——功率模块数量多是限制PET/SST功率密度提高的主要因素。而通过提高高频变压器工作频率的方法难以显著提高10k V配电网用PET/SST的功率密度。For the 10 k V medium voltage distribution grid applications,power electronic transformer / solid-state transformer（ PET / SST） is mainly adopted as the voltage and electric power flow regulator with galvanic isolation.In order to increase the power density,the existing PETs / SSTs for 10 k V distribution grid usually employ high-frequency converter with high-frequency transformer. This paper analyzes the factors that influence the power density of PETs / SSTs based on the prototype of 10 k Vac-750 Vdc /1MVA PET / SST. The main obstacle that restricts the improvement of the power density of PETs / SSTs is also pointed out,i. e. the large number of the power modules in the high-voltage power converter in PET / SST. Meantime,analyses also show that it is not valid to improve the power density of 10 k V grid oriented PETs / SSTs by increasing the operation frequency of the transformers.

关 键 词：能源互联网 智能电网 电能路由器 功率密度 电力电子变压器 

分 类 号：TN4[电子电信—微电子学与固体电子学]