电网技术2017，Vol.41Issue(2)：610-617,8.DOI:10.13335/j.1000-3673.pst.2016.0942
混合级联式电力电子变压器拓扑结构及控制策略
Hybrid Cascaded Power Electronics Transformer Topology and Control Scheme
摘要
Abstract
Several existing typical power electronic transformer (power electronics transformer, PET) topologies and their advantages and disadvantages were analyzed. Resonant converter and two-level square-wave converter were introduced into traditional cascaded power electronic transformer. A new power electronic transformer topology was proposed for MV and HV distribution network. Compared with conventional PET, new topology volume was significantly reduced, and its operational efficiency was improved. It could operate in flexible switching between pure active and reactive power compensation modes. In this paper, the proposed topology and operating principle were discussed in detail, and an average model of AC and DC sides of the system was established. On this basis, combined with operating characteristics of resonant converter, a single-stage unified control strategy was presented and PET control system was simplified. A 10 kV /1.5 MW PET simulation system was built. Simulation results show that new power electronic transformer topology and control strategy are feasible and effective.关键词
配电网/电力电子变压器/谐振变换器/单级控制Key words
distribution system/power electronics transformer/resonant converter/single-stage control system分类
信息技术与安全科学引用本文复制引用
刘闯,支月媚..混合级联式电力电子变压器拓扑结构及控制策略[J].电网技术,2017,41(2):610-617,8.基金项目
国家自然科学基金项目(51307021)；吉林省自然科学基金项目(20140101076JC)。 The National Natural Science Foundation of China (51307021) （51307021）
Jilin Province Natural Science Foundation of China (20140101076JC) （20140101076JC）
