一种用于配电网故障指示器的数据通信方式改进  

An Improved Data Communication Method for Distribution Network Fault Indicator

作　　者：余萍[1] 张艺海 YU Ping;ZHANG Yihai(North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电工技术》2022年第21期65-69,共5页Electric Engineering

基　　金：深圳供电局有限公司科技项目(编号090000KK 52180035)。

摘　　要：在配电网中,配电网故障指示器是检测线路故障的重要装置,它与汇集单元之间的通信需可靠、快速的传输手段,以便于判断故障点位置。由于故障指示器数量较多、没有专用通道,往往会相互干扰影响通信质量,因此提出一种单边带结合相移键控的数字调相方式。通过波形设计,得到了较低的峰均功率比(PAPR)值;单边带相位调制方式能有效降低射频信号的带宽,并获得更好的抗噪声性能。仿真研究表明,这种调制方式可实现频带缩减,提高抗干扰能力,适合故障指示器及其他低速窄带通信系统的应用场景。In the distribution network,the distribution network fault indicator is an important device for detecting line faults.The communication between it and the collection unit requires a reliable and fast transmission method to determine the location of the fault point.Due to a large number of fault indicators and no dedicated channel,the interference between them often affects the communication quality.For this reason,a digital phase modulation method with a single side Band combined with Phase-shift Keying is proposed.Through waveform design,a lower peak-to-average power ratio is obtained.Single sideband phase modulation can effectively reduce the bandwidth of RF signal and obtain better anti-noise performance.Simulation research shows that SSB-PSK can reduce the frequency band and improve the anti-jamming capability,which is suitable for the application scenarios of fault indicators and other low-speed narrow-band communication systems.

关 键 词：故障指示器 单边带调制 相位调制 频带利用率 

分 类 号：TM764[电气工程—电力系统及自动化]