新型自耦变压器耦合桥式固态限流器及其拓扑改进

发布时间：2018-03-02 03:10

本文关键词： 自耦变压器固态限流器限流电感晶闸管全控电力电子器件　出处：《电力系统自动化》2015年10期 　论文类型：期刊论文

【摘要】：变压器耦合桥式固态限流器的体积与成本取决于串联耦合变压器、整流桥和限流电感等限流器各组成部分。为减小串联耦合变压器的体积与成本,提出一种新型自耦变压器耦合桥式固态限流器,详细分析了其工作原理和限流过程。针对整流桥晶闸管无法控制关断从而导致限流电感必须设计得较大的缺点,进一步提出一种基于全控电力电子器件的限流器二次侧改进拓扑结构,缩短故障后整流桥和限流电感承受冲击电流的时间并降低冲击电流幅值和上升率,从而可减小整流桥电力电子器件和限流电感相关参数设计值,进一步降低限流器成本。仿真研究验证了相同限流目标下,相比串联耦合变压器,采用常规非自耦变压器,上述限流器具有更好的经济性。最后,对改进拓扑结构进行样机实验,验证了改进拓扑的有效性。
[Abstract]:The volume and cost of transformer coupling bridge type solid-state current limiter depend on the components of series-coupled transformer, rectifier bridge and current-limiting inductor. A new type of coupling bridge solid-state current limiter for autotransformer is proposed, and its working principle and current limiting process are analyzed in detail. Furthermore, an improved topology of the secondary side of the current limiter based on fully controlled power electronic devices is proposed to shorten the time of the rectifier bridge and the current-limiting inductor to withstand the shock current after the fault, and to reduce the amplitude and rise rate of the impulse current. Thus, the design value of power electronic device and current limiting inductance of rectifier bridge can be reduced, and the cost of current limiter can be further reduced. Simulation results show that, compared with series coupled transformer, conventional non-autotransformer is used in the same current limiting target. The proposed current limiter is more economical. Finally, the prototype experiment of the improved topology is carried out to verify the effectiveness of the improved topology.
【作者单位】：浙江大学电气工程学院;浙江省电力设计院;
【基金】：国家高技术研究发展计划(863计划)资助项目(2012AA050402)~~
【分类号】：TM411.3

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