一种改进串联谐振型限流器

发布时间：2018-03-17 09:19

本文选题：串联谐振型限流器　切入点：双分裂电抗器　出处：《电工技术学报》2015年06期 　论文类型：期刊论文

【摘要】：串联谐振型限流器(Series-Resonant type Fault Current Limiter,SRFCL)实现故障限流的关键是电容器的旁路(或短路)操作。本文通过引入双分裂电抗器,改变了电容器的旁路方法,实现了对串联谐振型限流器拓扑的改进。在理论上,分析了改进型串联谐振型限流器工作原理,并详细研究了限流过程中双分裂电抗器的电感变化特点。研究了电网稳态时双分裂电抗器绕组自感对限流电抗器和电容器的谐振关系的影响,和故障限流过程中绕组漏感对限流器的限流能力的调节作用和对电容器过流的抑制作用。通过建模仿真,分析了双分裂电抗器的漏感和电容器振荡电流的频率和幅值关系,研究了避雷器(MOV1和MOV2)残压与线路电流和电容器电流的关系。最后,在参数优化的基础上,设计和研制了一台400V改进型串联谐振型限流器样机,测试结果表明了双分裂电抗器能够提高串联谐振型限流器的可靠性和限流能力。
[Abstract]:Series-Resonant type Fault Current limiter-SRFCLs (Series-Resonant type Fault Current limiter-SRFCLs) are used to realize fault current limiting. The bypass (or short circuit) operation of capacitors is the key point. In this paper, double splitting reactor is introduced to change the bypass method of capacitors. The topology of series resonant current limiter is improved. In theory, the working principle of the improved series resonant current limiter is analyzed. The characteristics of inductance variation of double splitting reactor during current limiting are studied in detail, and the influence of self-inductance of double split reactor winding on the resonant relationship between current limiter and capacitor is studied in the steady state of power network. Through modeling and simulation, the relationship between leakage inductance of double splitting reactor and frequency and amplitude of capacitor oscillation current is analyzed. The relationship between residual voltage of arrester MOV1 and MOV2) and line current and capacitor current is studied. Finally, a 400V modified series resonant current limiter prototype is designed and developed on the basis of parameter optimization. The test results show that the double splitting reactor can improve the reliability and current limiting capacity of the series resonant current limiter.
【作者单位】：中国科学院电工研究所;丹东欣泰电气科技有限公司;
【基金】：辽宁省科学技术计划资助项目(2013040067-201)
【分类号】：TM471

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