基于限流电抗电流控制的新型桥式固态限流器

发布时间：2018-01-11 12:13

本文关键词：基于限流电抗电流控制的新型桥式固态限流器　出处：《电网技术》2014年03期 　论文类型：期刊论文

【摘要】：在基于晶闸管的单相/三相桥式固态限流器基础上,对其拓扑结构进行改进,其中整流桥路、续流桥路均采用二极管,减少电力电子可控元件的数量。提出了基于限流电抗电流控制的控制策略,通过控制限流电抗支路的全控电力电子开关器件的关断与导通,保持限流电抗电流稳定,限制线路故障电流的幅值,并对整个工作过程给出了完整分析。根据拓扑结构与工作原理,对控制系统与元件参数进行设计并进行建模仿真。结果表明该限流器正确工作于不同故障且对非故障相影响较小,能够精确控制故障电流并可灵活调整限流值,故障切除后线路能够迅速恢复正常工作,且适用于短时间多次故障、线路非全相运行和自动重合闸等情况。
[Abstract]:On the basis of the single-phase / three-phase bridge solid-state current limiter based on thyristor, the topology is improved. The rectifier bridge and the continuous current bridge are all diode. To reduce the number of power electronic controllable components, a control strategy based on current limiting reactance current control is proposed to turn off and conduct fully controlled power electronic switch devices by controlling the current limiting reactance branch. The current limiting reactance current is stable, the amplitude of fault current is limited, and the whole working process is analyzed, according to the topology and working principle. The control system and component parameters are designed and simulated. The results show that the current limiter works correctly in different faults and has little effect on the non-fault phase. It can accurately control the fault current and adjust the current limiting value flexibly. After fault removal, the line can quickly return to normal operation, and it is suitable for short time and multiple faults, line incomplete phase operation and automatic reclosing.
【作者单位】：浙江大学电气工程学院;
【基金】：国家863高技术基金项目(2012AA050402)~~
【分类号】：TM471
【正文快照】： 0引言电力系统规模不断扩大使得短路容量也随之增加,危害电力系统的安全稳定运行,容易对电力设备造成损坏。因而研制成本低廉、结构紧凑和控制性能良好的故障限流装置成为了短路限流技术的研究热点。其中,基于电力电子可控器件的固态限流器(solid-state fault current limiter

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