The Design And Implementation Of Remote Monitor System For Fault Location Signal Source In Distribution Network

Single-phase-earth fault is the main fault in distribution network.When single-phase-earth fault occurred,single-phase-earth fault location source in distribution network will inject constant current signal into fault phase,then staff will hold the detector by binary-search method to find the fault point along line.However,in the process of fault location,the complexity of distribution network environment,broughting inconvenience for detection of signal,which affected the progress of the fault location seriously.In this circumstance,the injected signal needs to be remote controlled.Considering the mobility and convenience of mobile client itself,Realize the remote control of the signal source by the mobile client application is the most ideal way now.In this scheme,the main work is design and implementation of a remote monitor system for fault location signal source in distribution network,which means that fault location signal source in distribution network can be remote controlled through the Android mobile client application.The main work include two aspects:On the one hand,the work is design and improvement of hardware circuit for the fault location signal source in distribution network.Which including that upgrade the existing products,relayout the components and optimize the system structure and performance,further reduce the size of products and improve its stability;In addition,GPRS module is added,which make it have the function of network communication.Through the cloud server with a fixed IP realizing data forwarding,ensure that the signal sourse can be remote controlled.On the other hand,the work is design and development of the Android client application,including design of UI for the software,client function and data transfer protocol,etc.Mobile client's main functions include user login function,the network communication function and alarm function.Through the network communication function,mobile clients can send control commands to the signal source and recevie information of the signal real-time running status,it also can turn on or turn off the signal sourse,as well as adjust the size of the injection current or call the data.Through the cloud server with a fixed IP data forwarding,the two-way communication of the mobile client and signal source is realized,which ensures the realization of the remote monitoring system of signal source,as well as ensures the validity and reliability of fault location.