抑制电力变压器投切涌流方案的实验分析与研究-BowenPublishing.PDF

电气工程期刊Scientific Journal of Electrical Eng ineering 抑制电力变压器投切涌流方案的实验分析与研究 １ １ ２ １ １ １ 海涛 ，王钧 ，骆武宁 ，陈明媛 ，陈快 ，王佳亮 1.广西大学电气工程学院，广西南宁 530004 2.广西诺斯贝电气有限公司，广西南宁 530004 摘要：电力变压器空载投切或恢复电压时均会产生幅值很大的涌流，对电力系统造成很多不利的影响。大多文献都是在忽 略剩磁等简化模型下对变压器投切过程进行仿真，这难免失真。该文根据励磁涌流的特性和产生机理，提出了一种改进的移 相关合策略。该策略在计及剩磁的影响下，主要通过相位计算和时序配合来实现抑制涌流。经实验验证，该方案实用、有效。 关键字：变压器；空载合闸；励磁涌流；控制策略 Research of Strategy on Restraining Transformer Inrush Current 1 1 2 1 1 1 Tao Hai ,Jun Wang , Wuning Luo ,Mingyuan Chen ,Kuai Chen ,Jialiang Wang 1:College of Electrical Engineering,Guangxi University,Nanning,530004 2:Nuosibei High Electric Co.Ltd.,Nanning,530004 hbwj8569@ 163.com Abstract : Th ere are large inrush currents when power tran sformer switch with no-load or recover its voltage with load after fau lts, which can cau se lots of adverse effects to th e power system . Most p apers simu late with simp lified model， which ignore reman en ce. An improved strategy of ph ase-shifting switch ing is proposed based on th e origin ating princip les and ch aracters of excitation inrush currents. Th e m ethod which takes into account rem anence achieves the suppression of inru sh currents throu gh th e phase calcu lation and sequ ential control. Experiments show th at th e method is practical and effective. Key Words: Tran sform er ; No-load switchin g; Excitation inru sh current s; Controllin g strategy 引言 电力变压器是电力系统最重要的设备之一。其空载合闸的瞬间，会产生幅值很大的励磁涌流。由于铁芯的非