配电自动化等效无线信号强度测试仪的研制

Development of Equivalent Wireless Communication Signal Strength Tester for Distribution Automation

无线网络通信方式是城市配电网配电自动化的主要通信方式之一。由于目前在配电网项目可研勘察、施工勘察以及自动化设备运维方面缺乏对配电自动化终端(distribution terminal unit,DTU)感受无线通信网络信号的有效测量手段,导致DTU在线率缺陷时出现责任界面不清晰的问题,影响施工与运维效率及DTU"快定位、速隔离"的功能。为此,在配电自动化感受无线信号强度模型的基础上,研制了一种可以准确测量配电自动化感受等效无线信号强度的装置,即利用通用attention指令获取DTU无线模块中接收的实时信号值与其他重要参数,可产生经过数据清洗与统计分析后的一定时段统计值,自带电池供电,从而解决配电自动化运维与施工勘察等多个场景中无线信号测试困难的问题。通过现场测试比对分析,该信号测量装置准确,易于携带,适用于主流厂家的无线模块,可广泛应用于配电自动化无线通信的信号测量与故障诊断工作。

Wireless network communication is one of main communication modes of distribution automation （DA） of city power distribution network. Due to deficiencies of effective measurement means for distribution terminal unit （DTU） receiving wireless communication signals in aspects of feasibility research investigation, construction investigation and operation and maintenance （O＆M） of automation equipment of distribution network projects, there is a problem of indistinct duty interface as online rate failure of DTU occurs which may affect construction and O ＆ M efficiency and fast location ＆ rapid isolation of DTU. Therefore, on the basis of the model of DA receiving wireless signal strength, this paper develops a kind of equipment that could accurately measure equivalent wireless communication signal strength by DA. This equipment uses general attention instruction to acquire real-time signal information values and other important parameters received by DTU wireless modules and produces statistic values in a certain period after data cleaning and statistics analysis. The equipment couples with self-power battery supply so as to solve the problem of difficulty in testing wireless communication signals in several scenarios including O ＆ M of DA. By field testing and comparison analysis, it proves testing results of this signal measurement equipment are accurate and reliable. Meanwhile, the equipment is easy carrying which is suitable for wireless modules of those mainstream manufacturers and is able to be widely used in signal measurement and fault diagnosis for DA wireless communication.