Huayi Power R&D and production of generator AC withstand voltage resonance test device includes generator AC withstand voltage test, generator withstand voltage test, power frequency AC withstand voltage test, generator withstand voltage test device, and generator series resonance device. The generator AC withstand voltage test device is designed for the power frequency AC withstand voltage test of hydraulic generators with a single unit capacity of 250MW and below.

Technical principle of generator AC withstand voltage test device: With the development of power systems, the capacity of operating equipment is increasing, such as thermal power generation units, whose single unit capacity has exceeded 1000MW, and hydroelectric power generation units, whose single unit maximum capacity has reached 800MW; If traditional testing equipment (i.e. power frequency test transformers) is used for the AC power frequency withstand voltage test of these devices, due to the large capacity required for the test, the test transformers and voltage regulators are very bulky, and the large capacity test power supply is also difficult to solve on site, making on-site testing extremely inconvenient. The power frequency resonance device has great advantages in terms of test power capacity, equipment weight, test waveform, and investment. This device is mainly designed and manufactured for the AC withstand voltage test of hydraulic generators with a single unit capacity of 250MW and below.

Product nickname: Power frequency resonance, power frequency series resonance, series resonance, series resonance transformer, series resonance test equipment, inductive power frequency resonance withstand voltage device, power frequency withstand voltage tester.

Note:1. The appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice. If there is any act of theft or copying, legal responsibility will be pursued
2. To learn more about Huayi products, please enter the product center. Service Hotline:

1. The device has protection functions such as overvoltage, overcurrent, zero start, and system detuning (flashing). The overvoltage and overcurrent protection values can be set according to user needs. When the test sample flashes, the flashing protection action can be taken and the flashing voltage value can be recorded for experimental analysis;

2. The entire device is lightweight, with a maximum weight of no more than 40kg, making it easy to use on site;

3. The device has four working modes, which facilitate users to flexibly choose according to the on-site situation and improve the testing speed. The working modes are: fully automatic mode, manual mode, automatic tuning manual boost mode;

4. Capable of storing and printing data in different locations, with numerical data numbers for easy identification and retrieval by users;

5. When the device automatically scans the frequency, the starting point of the frequency can be set arbitrarily within the specified range, and the scanning direction can be selected upwards or downwards. At the same time, the LCD screen displays the scanning curve, making it convenient for users to intuitively understand whether the resonance point has been found;

6. Adopting DSP platform technology, it is convenient to add or remove functions and upgrade according to user needs, making the human-machine exchange interface more user-friendly;

Application advantages of generator frequency AC withstand voltage test device:

1. The required power capacity is greatly reduced. Series resonant power supply generates high voltage and high current through resonance between resonant reactor and tested capacitor. In the entire system, the power supply only needs to provide the active consumption part of the system. Therefore, the required power supply for the experiment is only 1/Q of the test capacity;

2. The weight and volume of the equipment have been greatly reduced. In a series resonant power supply, not only is the bulky high-power voltage regulating device and ordinary high-power power frequency test transformer eliminated, but the resonant excitation power supply only requires 1/Q of the test capacity, greatly reducing the system weight and volume, usually 1/10-1/30 of ordinary test devices;

3. Improve the waveform of the output voltage. A resonant power supply is a resonant filtering circuit that can improve the waveform distortion of the output voltage, obtain a good sine waveform, and effectively prevent the breakdown of the test sample by harmonic peaks;

4. Prevent large short-circuit currents from burning the fault point. In the series resonance state, when the weak point of the insulation of the test sample is broken down, the circuit immediately loses resonance, and the loop current rapidly drops to 1/Q of the normal test current. When conducting voltage withstand tests using parallel resonance or test transformer methods, the breakdown current immediately increases by several tens of times. Compared to the two, the short-circuit current and breakdown current differ by hundreds of times. So, series resonance can effectively identify insulation weaknesses without the concern of large short-circuit currents burning the fault point;

5. There will be no overvoltage recovery. When the test sample breaks down, due to the loss of resonance conditions, the high voltage immediately disappears, the arc immediately extinguishes, and the process of re establishing the recovery voltage is long. It is easy to disconnect the power supply before reaching the flashover voltage again. This voltage recovery process is an intermittent oscillation process of energy accumulation, which is long and does not result in any recovery overvoltage;