摘要
直流电网技术的各类场景,均存在实现各类功能的直流型电力电子变压器。分布式/集中式的新能源电站自身的单极性直流输出,与外部连接的双极性电网之间,需要一种专用的单-双极运行方式转换直流电力电子变压器,用以匹配两者运行方式的差异。本文基于双向有源全桥电路,给出一种应用于该场景下的具体实现方案。在分析其电路拓扑、工作原理、控制策略基础上,设计出一套功率30k W,输入150V转换为±150V的单-双极运行方式转换直流电力电子变压器。针对不同的工况下外部条件不同以及控制目标差异,对变压器启动过程进行研究,并设计相应的启动控制策略。仿真与实验结果均证明了理论分析的正确性和有效性。
In the DC network, different DC-type power electronics transformers are required for different functions. The centralized/distributed renewable energy generation station is usually with monopolar configuration, which leads to the mismatch with the outside DC grid with the bipolar configuration. Therefore, a particular monopolar-to-bipo- lar DC-type power electronic transformer, M2B DC-PET, is needed to serve as interface between renewable energy generation station and DC grid. A detailed implementation scheme has been given in this paper, of which the rated transmission power is 30kW and rated voltage is 150V transformed into ＋ 150V. On the basis of theoretical analy- sis, corresponding startup strategies is designed according to the different scenarios. Both simulation and experi- mental results validated both the correctness and effectiveness of the theoretical analysis and discussion results on the proposed M2B DC-PET.
出处
《电工电能新技术》
CSCD
北大核心
2017年第5期59-66,共8页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(51477102)
上海市软科学研究计划项目(16692107400)
