The series resonance under UHV power can help many power workers conduct various power tests more conveniently.

The series resonance test device is a series resonance test device that uses tuned inductance and load capacitance to generate power frequency series resonance and obtain power frequency test voltage. Series resonance consists of an isolation transformer, a frequency and voltage regulating power supply, an excitation transformer, a reactor, and a capacitive voltage divider. The capacitor and reactor of the test sample form a series resonant connection; The voltage divider is connected in parallel to the test sample to measure the resonant voltage on the test sample and provide an overvoltage protection signal; The frequency modulation power output is coupled to the series resonant circuit through an excitation transformer, providing excitation power for series resonance.

working principle

A device that uses tuned inductors and load capacitors to generate power frequency series resonance and obtain power frequency test voltage, consisting of a variable frequency power supply, excitation transformer, reactor, and capacitive voltage divider.

The capacitor and reactor of the test sample form a series resonant connection; The voltage divider is connected in parallel to the test sample to measure the resonant voltage on the test sample and provide an overvoltage protection signal; The frequency modulation power output is coupled to the series resonant circuit through an excitation transformer, providing excitation power for series resonance. The series resonance test device is the latest generation of equipment specifically designed for AC withstand voltage testing of capacitive test samples. It is widely used for AC withstand voltage testing of various high-voltage cross-linked cables, transformers, generators, GIS switches, motors, and SF6 switch frequency conversion frequency modulation series resonance series resonance AC withstand voltage testing equipment.

Series resonance experimental device - Series resonance is mainly used for:

1 AC voltage withstand test of 6kV-500kV high-voltage cross-linked cable

2. AC voltage withstand test of generator

3. AC withstand voltage test for GIS and SF6 switches

4. Power frequency withstand voltage test of 6kV-500kV transformer

5. AC withstand voltage test for other high-voltage electrical equipment such as busbars, bushings, and transformers.

The functions of each component in the series resonance experimental device

The components of the series resonance test device include a variable frequency power supply, excitation transformer, high-voltage reactor, and capacitive voltage divider.

1. Variable frequency power supply: Convert a 220V/380V, 50HZ power supply into a frequency adjustable and voltage continuously adjustable series resonant device that integrates operation, protection, control, and monitoring functions

2. Excitation transformer: boosts the voltage output by the variable frequency power supply, while isolating high and low voltage

3. High voltage reactor: series resonance occurs with the capacitive test sample

4. Voltage divider: measures the high voltage and low voltage values on the regulator