Voltage sag severity grade judgment method
A voltage sag and judgment method technology, which is applied in the field of level judgment, can solve problems such as unreasonable division of severity levels and inaccurate assessment of voltage sag severity, so as to avoid short-term disturbances, shorten detection time, and suppress high The effect of frequency noise interference
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[0045] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0046] like figure 1 As shown, it is a flow chart of a method for judging the severity level of voltage sag provided by the present invention, which includes the following steps:
[0047] Step 1: Collect grid voltage data in real time, preprocess the grid voltage data, and construct a grid voltage data sample set.
[0048] The preprocessing of grid voltage data includes: removal of singular data, digital low-pass filter processing and normalization processing. The specific methods are as follows:
[0049] Remove the singular data in the grid voltage data collected in real time and generate missing data;
[0050] If the time interval before and after the missing data is small, for example: wit...
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