System ground capacitance measurement method and system
The invention discloses a system ground capacitance measurement method and system, and the method comprises the steps: sampling a secondary side opening triangular voltage of a voltage transformer with a set time length as a first voltage sequence, and connecting a DC power supply to a secondary sid...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a system ground capacitance measurement method and system, and the method comprises the steps: sampling a secondary side opening triangular voltage of a voltage transformer with a set time length as a first voltage sequence, and connecting a DC power supply to a secondary side opening triangular end of the voltage transformer at a t1 moment after the sampling is started, the direct-current power supply exits from the secondary side opening triangular end of the voltage transformer at the moment t2, the moment t2 is after the moment t1, and the set duration is equal to t1 + t2; delaying the first voltage sequence for t2 to obtain a second voltage sequence, and calculating the difference between the first voltage sequence and the second voltage sequence as a third voltage sequence; and calculating a system-to-ground capacitance value according to the oscillation frequency of the third voltage sequence. According to the invention, the switching of the DC power supply is carried out at the |
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