Voltage source for calibrating a fast transient voltage measurement system and calibration method

摘要

The present disclosure discloses a voltage source for calibrating a very fast transient voltage measurement system, comprising a DC high voltage power supply, a discharging gap, a high voltage travelling wave line concluding a high voltage conductor and an earthing conductor. The present disclosure also provides a method for calibrating a fast transient voltage measurement system: the high voltage conductor is insulated from the earthing conductor, and is open circuit at one end and at the other end is connected with the earthing conductor via the discharging gap, applying a high voltage between the high voltage conductor and earthing conductor and making breakdown of the discharging gap, a very fast transient high voltage is produced on the high voltage conductor and its waveform can be determined by theoretical calculation, the very fast transient high voltage with known waveform is used as the calibration voltage for calibrating the measurement system.

主权项

1. A method for calibrating a fast transient voltage measurement system, using a voltage source comprising a high voltage DC power supply, a discharging gap, a high voltage conductor and an earthing conductor, wherein
the high voltage conductor and the earthing conductor are high voltage insulated from each other and form a traveling wave line with constant wave impedance; the high voltage DC power supply is connected between the ends of the high voltage conductor and the earthing conductor, for charging DC high voltage between the high voltage conductor and the earthing conductor; the discharging gap is connected between the ends of the high voltage conductor and the earthing conductor; the discharging gap is broken down when the DC voltage between the high voltage conductor and the earthing conductor is risen to a certain amplitude; the method comprising:
a charging step, including:
starting the DC high voltage power supply to charge DC high voltage between the high voltage conductor and the earthing conductor;a breaking down step, including:
increasing the charging voltage between the high voltage conductor and the earthing conductor to a certain amplitude so that the discharging gap connected at the end of the high voltage conductor is broken down; and after the discharging gap being broken down, producing a very fast transient high voltage on the high voltage conductor, wherein the very fast transient high voltage is used as the calibration voltage.