Theory and application of distribution electronic power transformer
Theory and application of distribution electronic power transformer
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DOI：
10.1016/j.epsr.2006.02.012
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发表时间：
2007-03
影响因子：
3.9
通讯作者：
Dan Wang;C. Mao;Jiming Lu;Shu Fan;Fang-zen Peng
中科院分区：
文献类型：
--
作者：
Dan Wang;C. Mao;Jiming Lu;Shu Fan;Fang-zen Peng
分析了三相四线制配电电子式电力Transformer的工作原理。在分析的基础上，制定了控制方案。在该控制方案中，输入级被控制为三相平衡电流源，并使初级电流正弦化和功率因数容易调节。而输出级则作为三相平衡电压源进行控制，使负载电压保持正弦和标称值。为了满足单相或不平衡负载的要求，每相都是一个独立的电压源。仿真结果表明，该控制策略对DEPT系统的控制性能有一定的影响。并进一步进行了详细的仿真，验证了DEPT的电能质量控制功能。结果表明，DEPT具有良好的静、动态性能，既能实现常规电力Transformer的功能，又能防止电压暂降、暂升、闪变和谐波对负荷的影响，同时避免负荷对一次系统的冲击。
Three-phase and 4-wire Distribution Electronic Power Transformer's (DEPT's) operation principle is analyzed in this paper. Based on the analysis, the control scheme is established. In this control scheme, the input stage is controlled as a three-phase balanced current source and makes the primary current sinusoidal and power factor easily adjusted. While the output stage is controlled as a three-phase balanced voltage source and keep the load voltage sinusoidal and nominal. In order to meet the requirement of the single phase or unbalanced loads, each phase is an independent voltage source. With the proposed control strategy, the characteristics of DEPT are studied by simulations. And further detailed simulations are carried out to validate the power quality control function of DEPT. The results show that DEPT has very good static and dynamic performances, and it can not only realize the functions of conventional power transformer, but also can prevent from voltage sags, swells, flickers and harmonics infecting the loads while avoid loads impacting the primary system.