基于阻抗匹配的输电线路在线取能方法
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摘要
针对常规电流互感器感应取能方法启动电流大、输出功率较小的缺点,提出基于阻抗匹配的输电线路在线取能方法。该方法通过在开气隙磁芯的副边绕组串接电容与其励磁阻抗匹配,发生并联谐振,从而增加磁芯所在的阻尼支路等效阻抗,使得负载能通过另一支路分得更多电流,获得更多电能。该取能方法具有成本低、易安装、取电范围广、供电功率大且稳定等优点。最后的仿真以及实验都表明:基于阻抗匹配的输电线路在线取能方法相比常规电流互感器感应取能方法,在相同母线电流和磁芯时,能够获得更多功率。
Aiming at the shortcomings of large starting current and small output power for induction energy acquisition methods of conventional current transformers,an on-line energy acquisition method for transmission lines based on impedance matching is proposed in this paper.In this method,parallel resonance is generated by matching the secondary winding of the open gap magnetic core with its excitation impedance,thus the equivalent impedance of the damping branch of the magnetic core is increased.So that the load can get more electric energy by more current separated by the other branch.The energy acquisition method has the advantages of low cost,easy installation,wide range of power acquisition,large and stable power supply.The final simulation and experiments show that the on-line energy acquisition method of power transmission line based on impedance matching can achieve more power than the conventional current transformer induction energy acquisition method at the same bus current and the same magnetic core.
Aiming at the shortcomings of large starting current and small output power for induction energy acquisition methods of conventional current transformers,an on-line energy acquisition method for transmission lines based on impedance matching is proposed in this paper.In this method,parallel resonance is generated by matching the secondary winding of the open gap magnetic core with its excitation impedance,thus the equivalent impedance of the damping branch of the magnetic core is increased.So that the load can get more electric energy by more current separated by the other branch.The energy acquisition method has the advantages of low cost,easy installation,wide range of power acquisition,large and stable power supply.The final simulation and experiments show that the on-line energy acquisition method of power transmission line based on impedance matching can achieve more power than the conventional current transformer induction energy acquisition method at the same bus current and the same magnetic core.
引文
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[14]刘亚东,盛戈皞,王又佳,等.基于功率控制法的电流互感器取电电源设计[J].电力系统自动化,2010,34(03):70-74.LIU Ya-dong,SHENG Ge-hao,WANG You-jia,et al.Current Transformer Draw-out Power Supply Design Based on Power-Controlled Method[J].Automation of Electric Power Systems,2010,34(03):70-74.
[15]熊兰,何友忠,宋道军,等.输变电线路在线监测设备供电电源的设计[J].高电压技术,2010,36(09):2252-2257.XIONG Lan,HE You-zhong,SONG Dao-jun,et al.Design on Power Supply for the Transmission Line On-line Monitoring Equipment[J].High Voltage Engineering,2010,36(09):2252-2257.
[16]王智博.电流互感器取电电源的研究与设计[D].杭州:浙江大学,2015.WANG Zhi-bo.Research and Design of Current Transformer Feeding Power Supply[D].Hangzhou:Zhejiang University,2015.
[2]李鹏,黄新波,赵隆,等.智能输电线路状态监测代理的研究与设计[J].中国电机工程学报,2013,33(16):153-161+S20.LI Peng,HUANG Xin-bo,ZHAO Long,et al.Research and Design of Transmission Line Condition Monitoring Agent[J].Proceedings of the CSEE,2013,33(16):153-161+S20.
[3]KOBAYASHI K,MATSUO H,SEKINE Y.An Excellent Operating Point Tracker of the Solar-cell Power Supply System[J].IEEE Transactions on Industrial Electronics,2006,53(02):495-499.
[4]FATEH B,GOVINDARASU M,AJJARAPU V.Wireless Network Design for Transmission Line Monitoring in Smart Grid[J].IEEE Transactions on Smart Grid,2013,04(02):1076-1086.
[5]WU Y C,CHEUNG L F,LUI K S,et al.Efficient Communication of Sensors Monitoring Overhead Transmission Lines[J].IEEE Transactions on Smart Grid,2012,03(03):1130-1136.
[6]LUO C,HOFMANN H F.Wideband Energy Harvesting for Piezoelectric Devices with Linear Resonant Behavior[J].IEEE Transactions on Ultrasonics,Ferroelectrics and Frequency Control,2011,58(07):1294-1301.
[7]MOSER M J,BRETTERKLIEBER T,ZANGL H,et al.Strong and Weak Electric Field Interfering:Capacitive Icing Detection and Capacitive Energy Harvesting on a 220kV High-Voltage Overhead Power Line[J].IEEE Transactions on Industrial Electronics,2011,58(07):2597-2604.
[8]吴波,盛戈皞,曾奕,等.多电池组太阳能光伏电源系统的设计与应用[J].电力电子技术,2008,42(02):45-47.WU Bo,SHENG Ge-hao,ZENG Yi,et al.A Novel Design and Application of Solar Photovoltaic Power Supply System with Multi-battery[J].Power Electronics,2008,42(02):45-47.
[9]李华阳,尚宇炜,吴成才,等.高压电缆感应式取电电源分析及设计[J].电力电子技术,2012,46(10):83-86.LI Hua-yang,SHANG Yu-wei,WU Cheng-cai,et al.Research on a Electromagnetic Induction Fed Power Supply from High Voltage Cable[J].Power Electronics,2012,46(10):83-86.
[10]朱成喜,刘亚东,盛戈皞,等.导线监测装置取电研究[J].电力电子技术,2011,45(02):78-80.ZHU Cheng-xi,LIU Ya-dong,SHENG Ge-hao,et al.Study on Power Supply System in High-Voltage Transmission Lines[J].Power Electronics,2011,45(02):78-80.
[11]白玉成,吴功平,肖华,等.输电线路感应取电装置参数匹配方法[J].电力系统自动化,2010,34(21):75-80.BAI Yu-cheng,WU Gong-ping,XIAO Hua,et al.A Parameter Matching Method for Power Induction Devices on Power Transmission Lines[J].Automation of Electric Power Systems,2010,34(21):75-80.
[12]李先志,杜林,陈伟根,等.输电线路状态监测系统取能电源的设计新原理[J].电力系统自动化,2008,32(01):76-80.LI Xian-zhi,DU Lin,CHEN Wei-gen,et al.A Novel Scheme of Draw-out Power Supply Utilized in Transmission Line State Monitoring[J].Automation of Electric Power Systems,2008,32(01):76-80.
[13]任晓东,陈树勇,姜涛.电子式电流互感器高压侧取能装置的设计[J].电网技术,2008,32(18):67-71+76.REN Xiao-dong,CHEN Shu-yong,JIANG Tao.Design of a High Side Energy Extracting Device for Active Electronic Current Transformer[J].Power System Technology,2008,32(18):67-71+76.
[14]刘亚东,盛戈皞,王又佳,等.基于功率控制法的电流互感器取电电源设计[J].电力系统自动化,2010,34(03):70-74.LIU Ya-dong,SHENG Ge-hao,WANG You-jia,et al.Current Transformer Draw-out Power Supply Design Based on Power-Controlled Method[J].Automation of Electric Power Systems,2010,34(03):70-74.
[15]熊兰,何友忠,宋道军,等.输变电线路在线监测设备供电电源的设计[J].高电压技术,2010,36(09):2252-2257.XIONG Lan,HE You-zhong,SONG Dao-jun,et al.Design on Power Supply for the Transmission Line On-line Monitoring Equipment[J].High Voltage Engineering,2010,36(09):2252-2257.
[16]王智博.电流互感器取电电源的研究与设计[D].杭州:浙江大学,2015.WANG Zhi-bo.Research and Design of Current Transformer Feeding Power Supply[D].Hangzhou:Zhejiang University,2015.