一种新型同相供电系统分析与设计

为提高供电系统的电能质量和取消变电所电分相,提出一种基于V/v接线变压器的新型同相供电系统。首先,分析了该系统的拓扑结构及工作原理,完成负序电流和补偿电流的理论计算;其次,为实现对三相系统负序、谐波和无功综合改善的目标,采用一种基于dq变换的系统协同控制策略;最后,根据某牵引变电所典型实测负荷数据在Simulink中搭建系统仿真模型,验证了所提系统在取消变电所电分相的同时能有效提高供电系统的电能质量,并且具有良好的动态性能和综合补偿性能。

Analysis and Design of Novel Co-phase Power Supply System

To improve the power quality of a power supply system and eliminate the electrical phase separation at a substation, a novel co-phase power supply system based on a V/v traction transformer is proposed in this paper. First, the topology and working principle of the system are analyzed, and the negative-sequence current and compensation current are theoretically calculated. Second, to achieve the objective of improving the negative-sequence, harmonic and reactive power of the three-phase system, a collaborative control strategy for the system is adopted on the basis of dq transformation. Finally, a simulation model of the system is built in Simulink based on the measured load data of one traction substation, which verifies that the proposed system can effectively improve the power quality of the power supply system while eliminating the electrical phase separation at the substation. In addition, the novel system has satisfying dynamic performance and comprehensive compensation performance.