Method and device for positioning high-resistance grounding fault section of power distribution network and storage medium
A high-resistance ground fault and section positioning technology, which is applied to the fault location, measuring device, and fault detection according to the conductor type, can solve the problems of easy misjudgment and weak ability to withstand transition resistance, so as to improve accuracy, The effect of strong adaptability and difficulty reduction
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Embodiment 1
[0048] see figure 1 , is a schematic flowchart of a method for locating a high-resistance ground fault section in a distribution network provided in Embodiment 1 of the present invention, and the method includes steps S101 to S106.
[0049] S101. Obtain the zero-mode current recording data of each fault segment terminal.
[0050] In an optional embodiment, in order to ensure a sufficient data window, the acquired zero-mode current recording data is the zero-mode current of the line within a preset starting time threshold of zero-mode current mutation. Exemplarily, the zero-mode current of all lines is collected within the time range of 5 ms before the sudden start of the zero-mode current and 20 ms after the start, and the sampling rate is f S = 10kHz.
[0051] S102. According to the zero-mode current recording data, select an initial zero-mode current wave head, and use the zero-mode current initial wave head as a reference point to align the traveling wave heads of the zer...
Embodiment 2
[0083] see image 3 , is a schematic structural diagram of a positioning device for a high-resistance ground fault section of a distribution network provided in Embodiment 2 of the present invention, including:
[0084] The data acquisition module 201 is used to acquire the zero-mode current recording data of each fault-fixed segment terminal;
[0085] The traveling wave head processing module 202 is configured to select the initial wave head of the zero-mode current according to the zero-mode current recording data, and align the zero-mode current recording data of each terminal with the initial wave head of the zero-mode current as a reference point traveling wave head;
[0086] A judging module 203, configured to judge the magnitude of the initial wave head of the zero-mode current and the preset rated current value;
[0087] The initial wave head judging module 204 is used to calculate each terminal after the fault and its subsequent wave head according to the initial wa...
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