Fault Location Method And Application Research Of Low Voltage Centralized Meter Reading System

With the rapid development of China’s national economy and the continuous advancement of advanced information technology such as computer,communication and sensing,the pace of construction of smart grid has been rapidly advanced.The construction of low-voltage collection system has emerged and its technology has become increasingly mature and gradually widely available.Promotion.The low-voltage collection system realizes functions such as remote automatic meter reading,and gradually replaces manual meter reading.It can provide important basic data support for basic services such as line loss calculation and electricity bill settlement,and supports remote monitoring and control functions.An important means of using electricity information on the low voltage side.However,the operation and maintenance of the low-voltage collection system is dominated by the power supply bureau.At the same time,it involves the participation of multiple parties such as the power marketing system,the main station system,and the terminal manufacturer.The number of related terminal devices is huge,and different types of communication protocols are used to give low voltage.The operation of the collection system brings complexity and uncertainty.In addition,the energy meter is installed in the user’s building,and the physical topology is complicated.In the case of grid load changes,equipment file contingency mismatch,etc.,equipment failure or communication failure of the low-voltage collection system occurs.The operation and maintenance automation of the current low-voltage collection system is still at a low level,and there is still no effective fault location technology.The operation and maintenance personnel cannot quickly locate the fault point,resulting in low efficiency of fault handling,which is not conducive to the improvement of service quality by the grid company,which brings great challenges to the operation and maintenance work.Major work includes:(1)Firstly,the operation and maintenance status and fault location difficulties of the lowvoltage centralized reading system are summarized.Through the analysis of the overall structure and organizational structure characteristics of the low-voltage centralized reading system,the fault characteristics are combed;the communication requirements and collection schemes of different collection objects are summarized,and the technical characteristics and requirements of different communication protocols are analyzed.(2)According to different communication networking schemes of low-voltage centralized reading system,the topological description model of its physical topological structure is established,the communication topological correlation matrix between concentrator and electric energy meter is established,the physical topological analysis and further physical topological diagnosis are realized,and the fault location method and fault prediction method of low-voltage centralized reading system equipment based on topological analysis are proposed.(3)The fault location system of low-voltage centralized reading system is developed and tested.The test results show that the fault location method and fault prediction method of the low-voltage centralized reading system based on topology analysis can effectively realize the rapid troubleshooting of physical topology,equipment fault and other system abnormalities.The developed low-voltage centralized reading system fault location system can effectively improve the operation reliability and operation and maintenance efficiency of the low-voltage centralized reading system,and has broad prospects for promotion,and can be used in the future Bring substantial benefits to power grid enterprises.