Method for monitoring one-point grounding of secondary neutral point of voltage transformer between transformer substation and power plant
A power plant voltage and transformer technology, applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problems of labor and time consumption, and achieve the effect of avoiding power grid accidents, filling the gap of lack of monitoring means, and good monitoring effect
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[0008] Embodiments of the present invention: as figure 1 As shown, install a high-precision bushing-type zero-sequence current transformer on the protective screen of the secondary neutral point of the voltage transformer of the substation and power plant voltage transformer (N600), so that the grounding loop passes through it, and the The secondary terminal of the zero-sequence current transformer is connected to the current indicating milliampere meter, and the output contact signals "801" and "803" are added to the measurement and control panel for alarm.
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