With the rapid development of the modern power industry, large-capacity, high-voltage electrical equipment is emerging, and the traditional test equipment is unable to cope with the AC power frequency withstand voltage test of these large-scale equipment. Due to its bulky size, huge test power supply demand and inconvenient operation, the traditional power frequency test transformer can no longer meet the test needs of modern power system. It is in this context that the modulated power frequency series resonant withstand voltage device came into being, which provides an efficient, convenient and safe solution for the withstand voltage test of the power system.
TPXB-E modulated power frequency series resonance withstand voltage device is designed and manufactured for hydroelectric generators with a single capacity of 250MW and below, which uses the principle of series resonance to achieve resonance with the tested product by adjusting the inductance, so as to generate the required high voltage and large current on the tested product. This design not only greatly improves the efficiency and accuracy of the test, but also greatly reduces the complexity and risk of the test.
Product features: high efficiency and energy saving: due to the use of resonant reactive power full compensation technology, the power of the power supply and equipment is only less than 1 10 of the required capacity of the tested product. This means that the unit is smaller and lighter than conventional equipment at the same capacity, while the power capacity required is also greatly reduced, saving both energy and cost.
Excellent waveform: series resonance is actually a current filtering loop, which can ensure that the current through the tested product is mainly the fundamental current, which greatly reduces the waveform distortion rate of the output voltage, and makes the waveform quality significantly better than all existing types of AC withstand voltage equipment.
Safety protection: When the sample flashover or breakdown occurs, the short-circuit current is only less than 1 10 of the test current before the short-circuit, which effectively prevents further damage to the fault point after the breakdown. At the same time, the device will automatically extinguish the arc immediately after the flashover and return to the resonant state for a long time, which has neither the concern of voltage overshoot nor the danger of recovering the overvoltage that may occur in microsecond or millisecond transient processes.
Convenient operation: The device adopts intelligent design, simple and intuitive operation, and is equipped with perfect safety protection measures to ensure the personal safety of operators and the stable operation of the equipment.
With its high efficiency, safety and convenience, the modulated power frequency series resonant withstand voltage device has been widely used in the power system. It can not only meet the AC withstand voltage test requirements of large-capacity and high-voltage electrical equipment, but also provide a strong guarantee for the stable operation of the power system.