Abstract
Problems of practical implementation of traveling wave fault location caused by the registration of signals of different nature are considered. Analysis of the experimentally recorded traveling waves made it possible to divide them into 4 groups caused by partial discharges, lightning overvoltages, scheduled switching and fault commutations. The network dispatchers only needs the fault commutation information. Traveling waves recorded near the place of their origin have different meanings of diagnostic signs. The magnitude of the pre-alarm noise, the number of pulses in the signal and the duration of the signal are used as diagnostic indicators. These three diagnostic signs allow one to recognize each of the 4 causes of the travelling waves.
Highlights
The intensive practical development of wave methods for determining the location of damage in the last decade is due to advances in electronic technology and communications
Despite the results of a large number [1,2,3,4] of theoretical and experimental studies of travelling wave methods of fault location (TWFL), its large-scale implementation is complicated by many problems
The proposed work looks for the connection of the cause of the transient signal (TS) with its parameters based on the second approach, based on visualization of experimental data, and the development of a heuristic algorithm.The aim of feature selection is to determine a feature subset as small as possible
Summary
The intensive practical development of wave methods for determining the location of damage in the last decade is due to advances in electronic technology and communications. Despite the results of a large number [1,2,3,4] of theoretical and experimental studies of travelling wave methods of fault location (TWFL), its large-scale implementation is complicated by many problems. They are manifested both in the difficulty of achieving the potential accuracy of TWFL, and with problems related to the identification of transient signal (TS) with their causes. If the first problem is closely related to the influence of the dispersion mechanism, which aggravates the situation especially in heterogeneous cable and air lines, the second problem complicates its implementation, when information about non-emergency TS distracts grid dispatchers from operational work
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