Power grid fault intelligent positioning method and system

Abstract

The invention discloses a power grid fault intelligent positioning method and system, and relates to the field of fault positioning of a power grid. The method includes following steps: step S001, establishing a power grid distribution model; step S002, installing traveling wave recording apparatuses at two ends of lines and branch terminals; step S003, starting an electronic timer when the traveling wave recording apparatuses receive faulty initial traveling waves; step S004, receiving the time reaching two ends for the traveling waves by the traveling wave recording apparatuses at two ends of the lines; step S005, calculating the distances from a fault point to two ends after information exchange through a communication network; and step S006, displaying the position of the fault point at the power grid distribution model. According to the method and system, the time difference from the initial travelling wave surge and the fault point reflection wave to a measuring end bus is obtained, fault locating of the power grid is realized by employing a formula, fault display of the power grid is realized through a Web server, related staff can be helped to rapidly search the faults, anda lot of manpower, material resources and financial resources consumed by fault line patrol are reduced.

Description

technical field [0001] The invention belongs to the field of grid fault location, in particular to a grid fault intelligent positioning method and system. Background technique [0002] Under the guidance of the purpose of "developing the economy, power first", China's electric power industry is booming. The continuous expansion of power system capacity, the continuous increase of power supply level, and the continuous construction of new transmission and distribution overhead lines have made the power grid increasingly complex. The power system Higher requirements are put forward for the monitoring of power grid faults and the quick action of relay protection. [0003] However, the high-voltage transmission line has a long transmission distance, is exposed in the wilderness, and has multiple lines in mountainous and hilly terrain, which is prone to failure. The fast and accurate location of fault points has always been an unresolved problem for the power sector. The inabili...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a grid fault intelligent positioning method and system. By obtaining the time difference between the initial traveling wave surge and the reflected wave at the fault point reaching the busbar at the measurement end, the fault location of the grid is realized by using the formula and the fault of the grid is detected through the Web server. Demonstration, it solves the problems of difficult fault location in the existing power grid, long time-consuming, low accuracy, and heavy operation and maintenance by operation and maintenance personnel

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