【摘要】 供电可靠性及电能质量一直是用户和供电部门密切关注的问题。在电网中 ,变压器是电能转换的最基本的元件 ,但常规变压器难以对供电可靠性的提高和电能质量的改善作出贡献。本文介绍了一种全新的产品 -电力电子变压器 ,它具有提高供电可靠性、改善电能质量并且体积小、重量轻、环保效果好等一系列优点 ,可以较好地解决这些问题。在对电力电子变压器现有方案进行分析的基础上 ,本文提出了一种新的实现方案 ,计算机仿真结果表明 :变压器原方可以实现输入电流波形为正弦和功率因数接近于 1 ,变压器副方可以获得良好的输出电压、电流。更多还原

【Abstract】 Reliability of power supply and power quality are always the concerns of customers and power departments.In transmission and distribution system,transformer is a basic component of energy conversion.However,conventional transformer cannot contribute to improving reliability of power supply and conditioning power quality.In this paper,a new production power electronic transformer is introduced.It has many merits:improving reliability of power supply,conditioning power quality,smaller bulk,lighter weight,more effective environmental protection and so on.On the base of analyzing present schemes of PET,a new scheme is proposed in this paper.The simulation results show very good performances.On the primary side of PET,input current is almost the same as sine waves and it has a close to unit power factor;on the secondary side,better output voltage and current can be guaranteed.更多还原