Generator frequency modulation resonance test device

KD-3000Generator frequency modulation resonance test deviceDetailed Introduction

atGenerator frequency modulation resonance test deviceThe self-developed frequency modulation and voltage regulation software technology is used in the domestic high-voltage testing industry to design and manufacture a frequency modulation series parallel resonant AC withstand voltage test device using 16 bit fine frequency modulation, 10KHz carrier frequency, SPWM, and imported original IPM integrated module design. The device complies with relevant national regulations and requirements for high-voltage testing.
Widely used in industries such as power, metallurgy, petroleum, and chemical engineering, suitable for high-capacity, high-voltage capacitive samples such as generators and transformers GIS、 Handover and preventive tests for high-voltage cross-linked cables, transformers, bushings, etc.
working principle
The series resonance composed of reactor L and the tested capacitor C has a fixed resonance frequency F=1/(2 π√ L · C). When the test frequency is equal to this frequency, the circuit resonates. Through this principle, power is provided by a frequency modulation power supply to the excitation transformer, which is then transformed into medium voltage by the excitation transformer and added to L and the tested capacitor C. By changing the output frequency of the frequency modulation power supply, the circuit is in series resonance state, and then adjusting the output voltage of the frequency modulation power supply to achieve the required voltage value on the test sample.

technical indicators
1. Environmental temperature: -10~45 ℃
2. Working humidity: ≤ 90%
3. Altitude: ≤ 2000M
4. Power input: 220V ± 10% single-phase output 0-2220V (≤ 10KW)
380V ± 10% three-phase, 50Hz output 0-400V
5. Rated test capacity: 0-8000KVA (optional)
6. Resonant voltage: 0-1000KV (optional)
7. Frequency adjustment range: 0.1-300Hz
8. System measurement accuracy: Level 0.5
9. Frequency adjustment resolution: 0.01Hz
10. Instability: ≤ 0.05%
11. Output waveform: sine wave
12. Waveform distortion rate: ≤ 0.5%
13. Noise: 60dB
14. Reactor Q value: 30-200

Composition of complete equipment
Frequency modulation power supply - can change both its output frequency and output voltage.
Excitation transformer - plays a role in coupling signals and voltage conversion, and increases voltage according to its own changes.
Reactor - connected in series with the test sample to form an LC series resonant circuit.
Capacitive voltage divider - measures the voltage on the test sample and feeds it back as a sampling signal to the frequency modulation power supply.
Compensation capacitor - compensates for small capacitance of the test sample and adjusts the frequency of the test sample.