Power distribution network single-phase earth fault positioning method and system
A single-phase grounding fault, location method technology, applied in fault location, information technology support system, fault detection by conductor type, etc., can solve problems such as difficulty in adapting to the requirements of massive data processing, difficulty in convergence, etc., and the method is simple and easy to implement , the effect of accurate positioning results
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Embodiment 1
[0049] When the medium voltage distribution network is in normal operation state, there is little difference in the operation of each node. Therefore, when clustering analysis is performed on the section information corresponding to each node, it appears as a clustered point in a high-dimensional space. When a fault occurs in a faulty section, compared to non-faulty nodes (NFN, Non-fault node) outside the faulty section, the faulty node (FN, Faultynode) becomes an abnormal point far away from the "class".
[0050] Such as figure 1 As shown, a method for locating a single-phase-to-ground fault in a distribution network in this embodiment includes:
[0051] Step 1: Select the zero-sequence current and negative-sequence current information of the half cycle before and after the fault as the fault characteristic quantity.
[0052] Aiming at the single-phase ground fault with the highest occurrence frequency in the distribution network, combined with the actual operation status o...
Embodiment 2
[0096] This embodiment provides a distribution network single-phase ground fault location system, including:
[0097] (1) Feature quantity selection module, which is used to select the zero-sequence current and negative-sequence current information of half cycles before and after the fault occurs as the fault feature quantity;
[0098]Aiming at the single-phase ground fault with the highest occurrence frequency in the distribution network, combined with the actual operation status of the distribution network, the zero-sequence current and negative-sequence current generated when the single-phase ground fault occurs are selected as characteristic quantities to lay a data foundation for the data processing link .
[0099] (2) a data preprocessing module, which is used to construct a single feature quantity differentiated node matrix from the fault feature quantity based on the distribution network topology;
[0100] The role of the network description matrix is to describe th...
Embodiment 3
[0133] This embodiment provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the steps in the method for locating a single-phase-to-ground fault in a distribution network as described in Embodiment 1 are implemented.
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