Method and device for fast distance protection of transmission line with UFC
A technology for distance protection and transmission lines, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as UPFC line misoperation and overrunning, and achieve the effect of ensuring reliability and quick action
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[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0030] method embodiment
[0031] The fast-distance protection method for a transmission line containing UPFC in the method embodiment of the present invention is used in the protection of an AC transmission line containing UPFC system access. Transmission lines with UPFC systems such as figure 1 As shown, the fast distance protection workflow is as follows figure 2 As shown, the method includes the following steps:
[0032] (1) The line protection devices on both sides independently collect the voltage and current of each side;
[0033] The method of collecting voltage and current on both sides is as follows: for the near UPFC side, the voltage is measured by the line side PT, and the current is measured by the line CT; for the far UPFC side, the voltage can be measured by the line side PT or the bus side PT, and the current is measured by the line CT. ...
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