大气条件下离子迁移率测量装置的结构与结果校正解释.pdfVIP

第40卷第6期：1768．1774 2014年6月30日 高电压技术 High Voltage Engineering V01．40．No．6：1 768—1 774 June 30，2014 DOI：10．13336／j．1003—6520．hve．2014．06．023 大气条件下离子迁移率测量装置的结构分析与 结果校正耋日木oI义上[ 季一鸣，张波，何金良 (清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室，北京100084) 摘要：为准确测量大气条件下的离子迁移率，基于平行平板离子流产生与测量法，搭建了平行平板离子流发生 器，测量并讨论了该发生器测量区域的场均匀性，推导出使用该平行平板离子流发生器测量离子迁移率的方法。 结果表明，平行平板电极上极板网面的理想程度决定了该装置的测量准确度；由于网面存在“喷泉”现象，因此 采用平行平板法直接测量离子迁移率时会产生误差。当极板电压在600～1 200 V之问时，采用由下极板电场强度 反推上极板电位的矫正方法所得到的大气中的正、负离子迁移率与实际值相符。 关键词：直流输电线路；电磁环境；离子流场；离子迁移率测量；平行平板离子流产生与测量法；平行平板离子 流发生器；校正方法 Structure Analysis and Result Correction of Ion Mobility Measurement Apparatus in Air JI Yiming，ZHANG Bo，HE Jinliang (State Key Laboratory ofControl and Simulation ofPower System and Generation Equipments，Department ofElectrical Engineering， Tsinghua University,Beijing 100084，China) Abstract：In order to measure the ion mobility in real air condition precisely,we built a parallel—plate ion flow generator based on the parallel—plate ion flow generation and its measurement method．The field uniformity in the measurement area of this generator was measured and discussed．Then we deduced the method for measuring ion mobility measurement with the generator．The results show that the idealization extent of the upper plate net of parallel--plate electrodes deter·- mines precision ofthe device．Because of the‘spray’on the upper plate net，there will be errors in the direct measurement results of ion mobility using this parallel-plate method．MoreoveL when the parallel—plate volmge is in the range of 600-1 200 V the measured values of positive and negative ion mobility in real air condition，which are processed using the correction method of deducing the voltage of the upper electrode plate from the electric field of the bosom electrode plate，are consistent with their actual values． Key words：DC transmission lines；electro—-magnetic environment；ion flow field；ion mobility measurement；paral-· lel—plate ion flow generation and measurement method；parallel—plate ion