基于NB-IoT的分布式光伏电站漏电监测系统
|
摘要
针对分布式光伏电站缺少漏电流无线监测设备的实际情况,介绍一种基于NB-IoT(窄带物联网)无线高精度磁调制电流传感器的漏电监测系统。该系统由感知层、传输层、平台层和应用层四部分构成。通过对影响磁调制传感器精度的定性和定量研究,提出双磁芯半波激励方案,优化传感器设计,提高其精度。汇流箱中的电流传感器采集数据信息通过单片机经由NB-IoT网络传输至云平台。该系统能够实现使用云平台对分布式光伏电站系统漏电流进行在线实时监测和故障定位,且能有效解决分布式光伏电站的漏电监测问题。
In view of the actual situation that the distributed photovoltaic power stations lack electric leakage monitoring equipments,an electric leakage monitoring system based on high-precision wireless magnetic modulation current sensor of NBIoT(narrow-band Internet of Things)is introduced. The system consists of perception layer,transport layer,platform layer and application layer. By means of the qualitative and quantitative research on the accuracy of magnetic modulation sensor,a doublecore half-wave excitation scheme is proposed for optimizing the sensor design and improving its accuracy. The current sensor in the junction box is applied to collecting the data information which will be sent to the cloud platform through the NB-IoT network. The system can realize on-line real-time monitoring and fault location of electric leakage devicesof distributed photovoltaic power stations using cloud platform,and the electric leakage monitoring of distributed photovoltaic power stations.
In view of the actual situation that the distributed photovoltaic power stations lack electric leakage monitoring equipments,an electric leakage monitoring system based on high-precision wireless magnetic modulation current sensor of NBIoT(narrow-band Internet of Things)is introduced. The system consists of perception layer,transport layer,platform layer and application layer. By means of the qualitative and quantitative research on the accuracy of magnetic modulation sensor,a doublecore half-wave excitation scheme is proposed for optimizing the sensor design and improving its accuracy. The current sensor in the junction box is applied to collecting the data information which will be sent to the cloud platform through the NB-IoT network. The system can realize on-line real-time monitoring and fault location of electric leakage devicesof distributed photovoltaic power stations using cloud platform,and the electric leakage monitoring of distributed photovoltaic power stations.
引文
[1]李鹏,包婧文,葛晓敏,等.中国光伏产业发展将进入“下半场”[J].太阳能,2018(1):13.LI Peng,BAO Jingwen,GE Xiaomin,et al. China′s photovoltaic industry will enter the second half[J]. Solar,2018,12(1):13.
[2]陈鸣,肖慧明.基于直流漏电流检测的光伏汇流箱系统[J].现代电子技术,2016,39(8):147-149.CHEN Ming,XIAO Huiming. Photovoltaic junction box system based on DC leakage current detection[J]. Modern electronics technique,2016,39(8):147-149.
[3]刘航.光伏并网系统电流检测技术的研究[D].天津:河北工业大学,2013.LIU Hang. Research on current detection technology in photovoltaic grid connected system[D]. Tianjin:Hebei University of Technology,2013.
[4]李治州.并网型光伏电站监控系统的设计与实现[D].成都:电子科技大学,2015.LI Zhizhou. Design and implementation of grid connected photovoltaic power station monitoring system[D]. Chengdu:University of Electronic Science and technology,2015.
[5]左云波,王欢,徐小力,等.太阳能光伏发电无线监控系统[J].太阳能,2011,12(1):29-32.ZUO Yunbo,WANG Huan,XU Xiaoli,et al. Solar photovoltaic power generation wireless monitoring system[J]. Solar energy,2011,12(1):29-32.
[6]武一,李奎,王尧,等.磁调制式剩余电流传感器的动态励磁过程分析与仿真[J].电工技术学报,2014,29(7):244-252.WU Yi,LI Kui,WANG Yao,et al. Analysis and simulation of dynamic excitation process of residual current sensor with magnetic modulation system[J]. Acta electrotechnical sinica,2014,29(7):244-252.
[7]李来杰.直流小电流传感器的研究与设计[D].保定:华北电力大学,2017.LI Laijie. Research and design of DC low current sensor[D].Baoding:North China Electric Power University,2017.
[8] LUO Xiang,WANG Du Y,CHEN X H,et al. Tripping characteristics of residual current devices under non-sinusoidal currents[J]. IEEE transactions on industrial applications,2011,47(3):1515-1521.
[9] PEJOVIC P. A simple circuit for direct current measurement using a transformer[J]. IEEE transactions on circuits&systems I:fundamental theory&applications,2002,45(8):830-837.
[10]王隆伟.磁调制直流漏电流传感器信号处理电路设计[D].武汉:华中科技大学,2016.WANG Longwei. Design of signal processing circuit for magnetic modulation DC leakage current sensor[D]. Wuhan:Huazhong University of Science and Technology,2016.
[11] TUSHAR W,YUEN C,LI K,et al. Design of cloud-connected IoT system for smart buildings on energy management(invited paper)[J]. Industrial networks&intelligent systems,2016,3(6):150813.
[12]钱志鸿,王义君.物联网技术与应用研究[J].电子学报,2012,40(5):1023-1029.QIAN Zhihong,WANG Yijun. Research on technology and application of Internet of Things[J]. Acta electronica sinica,2012,40(5):1023-1029.
[13]中国移动通信集团公司.中国移动物联网开放平台:OneNet[EB/OL].[2016-06-29]. http://iot.10086.cn/.CMCC. IoT open platform—OneNet[EB/OL].[2016-06-29].http://iot.10086.cn/.
[2]陈鸣,肖慧明.基于直流漏电流检测的光伏汇流箱系统[J].现代电子技术,2016,39(8):147-149.CHEN Ming,XIAO Huiming. Photovoltaic junction box system based on DC leakage current detection[J]. Modern electronics technique,2016,39(8):147-149.
[3]刘航.光伏并网系统电流检测技术的研究[D].天津:河北工业大学,2013.LIU Hang. Research on current detection technology in photovoltaic grid connected system[D]. Tianjin:Hebei University of Technology,2013.
[4]李治州.并网型光伏电站监控系统的设计与实现[D].成都:电子科技大学,2015.LI Zhizhou. Design and implementation of grid connected photovoltaic power station monitoring system[D]. Chengdu:University of Electronic Science and technology,2015.
[5]左云波,王欢,徐小力,等.太阳能光伏发电无线监控系统[J].太阳能,2011,12(1):29-32.ZUO Yunbo,WANG Huan,XU Xiaoli,et al. Solar photovoltaic power generation wireless monitoring system[J]. Solar energy,2011,12(1):29-32.
[6]武一,李奎,王尧,等.磁调制式剩余电流传感器的动态励磁过程分析与仿真[J].电工技术学报,2014,29(7):244-252.WU Yi,LI Kui,WANG Yao,et al. Analysis and simulation of dynamic excitation process of residual current sensor with magnetic modulation system[J]. Acta electrotechnical sinica,2014,29(7):244-252.
[7]李来杰.直流小电流传感器的研究与设计[D].保定:华北电力大学,2017.LI Laijie. Research and design of DC low current sensor[D].Baoding:North China Electric Power University,2017.
[8] LUO Xiang,WANG Du Y,CHEN X H,et al. Tripping characteristics of residual current devices under non-sinusoidal currents[J]. IEEE transactions on industrial applications,2011,47(3):1515-1521.
[9] PEJOVIC P. A simple circuit for direct current measurement using a transformer[J]. IEEE transactions on circuits&systems I:fundamental theory&applications,2002,45(8):830-837.
[10]王隆伟.磁调制直流漏电流传感器信号处理电路设计[D].武汉:华中科技大学,2016.WANG Longwei. Design of signal processing circuit for magnetic modulation DC leakage current sensor[D]. Wuhan:Huazhong University of Science and Technology,2016.
[11] TUSHAR W,YUEN C,LI K,et al. Design of cloud-connected IoT system for smart buildings on energy management(invited paper)[J]. Industrial networks&intelligent systems,2016,3(6):150813.
[12]钱志鸿,王义君.物联网技术与应用研究[J].电子学报,2012,40(5):1023-1029.QIAN Zhihong,WANG Yijun. Research on technology and application of Internet of Things[J]. Acta electronica sinica,2012,40(5):1023-1029.
[13]中国移动通信集团公司.中国移动物联网开放平台:OneNet[EB/OL].[2016-06-29]. http://iot.10086.cn/.CMCC. IoT open platform—OneNet[EB/OL].[2016-06-29].http://iot.10086.cn/.