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| 摘要: |
| 提出一种快速自励式消弧线圈,其是磁饱和可控电抗器。消弧线圈需要在单相接地故障发生后2个工频周期内达到设定的补偿效果,为了加速消弧线圈的动态响应过程,增加了加速环节。通过主辅励磁协调工作,使消弧线圈在2个工频周期达到额定值。同时,通过改变消弧线圈铁芯结构,解决了在零励磁情况下电感的非线性问题,减少了铁磁谐振对电网造成的危害;并且通过中柱增加扼流绕组缓冲了消弧线圈对电网的冲击。描述了消弧线圈的励磁系统数字控制实现,应用了最新的DSP FPGA组合控制,实现了消弧线圈快速补偿。 |
| 关键词: 消弧线圈,自励式,可控电抗器,快速响应 |
| DOI： |
| 分类号:TM475 |
| 基金项目:国家新产品计划 |
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| On high-speed self-excitation arc suppression coil and its application |
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ZHANG Jian-wen CAI Xu
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| Abstract: |
| A high-speed self-excitation arc suppression coil based on magnetic saturation con-trollable reactor is presented.To compensate the current within two power periods when a single-phase grounding fault occurs,a speedup section is designed additionally to speed up its dynamic respond process.Through the coordination of the main and auxiliary excitations,the arc suppression coil reaches the rated value within two power periods.The core structure of the arc suppression coil is improved to solve the nonlinearity of voltage with zero-excitation.The harm of ferro-resonance is thus reduced.The choking winding is added to the medium column to mitigate the impact of the arc suppression coil on the power system.The implementation of digital control strategy based on DSP(Digital Signal Processor) and FPGA(Field Programmable Gate Array) for fast compensation is described. This project is supported by the National Key New Product Plan(2002ED620004). |
| Key words: arc suppression coil,self-excitation,controllable reactor,fast response |
