Electric power signal zero crossing point detection method
A zero-crossing detection and power signal technology, which is applied to measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve problems such as inaccurate judgment of real zero-crossing points, errors in power signal calculation and analysis, etc.
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[0020] The technical solution of the present application will be described in further detail below in conjunction with the accompanying drawings.
[0021] as attached figure 1 Shown is the power signal zero-crossing detection method disclosed in this application, and the specific steps are as follows:
[0022] (1) Collect power signal data at a fixed sampling frequency to obtain the data values of the power signal at each sampling point Sample[1], Sample[2]...Sample[N], where N is the number of sampling points per cycle, usually The number of sampling points is 128, 256 or 512, etc., and the N value has a great relationship with the subsequent threshold value.
[0023] (2) Among all the power signal data sampling point data values, if the following conditions are met, the sampling point data is judged to be a possible zero-crossing point of the power signal. The process is as follows: figure 2 Shown:
[0024] Extract the collected data Sample[], if the collection frequen...
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