Frequency conversion series resonance test, Wuhan UHV specializes in producing series resonance, with a wide range of product selection and professional electrical testing. To find series resonance, choose Wuhan UHV.
The frequency conversion series resonance test is widely used in industries such as power, metallurgy, petroleum, and chemical engineering, and is suitable for high-capacity, high-voltage capacitive specimens such as generators and transformers GIS, Handover and preventive tests for high-voltage cross-linked cables, transformers, bushings, etc.
Working principle of frequency conversion series resonance test
The frequency conversion series resonance test applies the principle of series parallel resonance. By adjusting the output frequency of the frequency conversion controller, the inductance L of the reactor in the circuit and the capacitance C of the test sample resonate, and the resonance voltage is the voltage applied to the test sample. The power supply is provided through the frequency modulation controller, and the test voltage is initially boosted by the excitation transformer to apply high voltage to the reactor L and the test sample CX. By changing the output frequency of the frequency modulation controller, the circuit is in series resonance state; The resonant frequency of the circuit depends on the capacitance CX of the test sample and the inductance L of the reactor. Adjust the output voltage of the variable frequency controller to achieve the required voltage value of the high voltage on the test sample.
Characteristics of frequency conversion series resonance test
High stability and reliability. The system uses imported power components as the core of power conversion, with stable voltage and frequency output, reasonable electromagnetic compatibility design, and complete protection functions. After multiple high-voltage direct to ground short circuit tests, the system still remains intact, and at the same time, the system also has strong overload capacity.
The automatic tuning function is powerful. When the system is automatically tuned, it automatically scans from 30Hz to 300Hz and displays the sweep curve, allowing users to intuitively see the tuning process of the system; After the frequency sweep is completed, the system performs a fine frequency sweep with a resolution of 0.01Hz within its ± 5Hz range based on the resonance frequency point preliminarily found by the sweep, and finally precisely locks the resonance frequency.
Support multiple experimental modes. The system supports test modes such as "automatic tuning+manual voltage adjustment", "automatic tuning+automatic voltage adjustment", "manual tuning+manual voltage adjustment", etc. It is recommended to use the "automatic tuning+manual voltage adjustment" mode, which can quickly find the resonance point and control the test process through manual voltage adjustment, with higher safety.
The system has a user-friendly human-computer interaction interface. The experimental parameter settings, experimental control, and experimental results are displayed on the same screen, which is intuitive and clear, and has automatic timing and operation prompt functions. Full touch screen operation and display, with the function of saving and querying experimental data.
The protection function is complete. Equipped with zero position protection (prohibiting system startup when the voltage output control knob is not in zero position), overvoltage protection, overcurrent protection, flashover protection, and other functions, ensuring the reliability of the system.
Characteristics of frequency conversion series resonance test
1. The large screen displays test data, test status, and has real-time operation step indication function.
2. Can flexibly adjust the test voltage, frequency range, and pressurization time.
3. The test results can calculate the capacitance value of the test sample and be printed
4. Small size, light weight, and easy operation.
5. High resolution, frequency resolution of 0.01Hz, and voltage resolution of 0.01V.
6. High safety and reliability, the system has overvoltage, overcurrent, and discharge protection functions to ensure personal and equipment safety.
7. Upgradeable operating software.