Red Resonance Testing Equipment Power Frequency Voltage 5.5-500kW Rated Capacity

As the development of the electric system, the capacity of the equipment more and more larger, for example, the capacity of single machine of the thermoelectric generator group is more than 1000MW, the capacity of single machine of the hydroelectric generator group is more than 800MW, if use traditional equipment (frequency test transformer) , need large capacity, test transformer, voltage regulator are very heavy, it is not convenient for field test. Serial resonant system is better than traditional equipment in power capacity, device weight, measured waveform and cost. It is special designed for the AC voltage withstand test for hydroelectric generator which its single machine capacity ≤250MW.

1.The required power capacity is greatly reduced. Series resonance power is using the resonance reactor and the participants resonance capacitance generate high voltage and high current, in the whole system, the power only need to provide a part of the system energy consumption, therefore, the test power is only required for the capacity of 1 / Q.

2. The weight and volume of equipment is greatly reduced. Series resonance power, not only saves the massive power regulating instrument and ordinary high power test transformer, power frequency and resonant excitation power supply need to test the capacity of 1 / Q, greatly reduce the system weight and volume, generally for the common test instrument of 1/10-1/30.

3. To improve the output voltage waveform. Resonant power supply is resonant filter circuit, can improve the output voltage waveform distortion, obtain good sine waveform, effectively prevent the harmonic peaks to try breakdown by mistake.

4. To prevent large short-circuit current burn point of failure. The sample (s) in the series resonance state, when the insulation of the weaknesses is breakdown, the circuit immediately harmonic, quickly reduced to normal test current loop current 1 / Q. Or testing transformer and parallel resonant mode do withstand voltage test, the breakdown current rise immediately, several times, compared to the short circuit current and the breakdown current differ hundreds of times. So, series resonance can effectively find weaknesses of insulation, and there is no large short-circuit current burn fault point of concern.

5. Won't appear any recovery over-voltage. Try breakdown occurs, loss of resonance condition, high voltage, arc immediately put out, also immediately disappear and the recovery voltage to build process is very long, it is easy to disconnect the power supply before flashover voltage again, the voltage of the recovery process is a kind of intermittent oscillation process of energy accumulation, the process is long, and there will not be any recovery over-voltage.