The series resonance test equipment is mainly used for AC withstand voltage testing of different electrical equipment such as cross-linked cables, transformers GIS, Electric motors and generators, etc., but the difference lies in the testing equipment or machines used, and the required equipment will also vary. Usually, it is necessary to design a configuration plan based on the scope of the customer's test sample and the requirements during the testing process. The series resonance test equipment can be selected and matched according to the customer's usage conditions to meet the testing requirements of different regions, samples, and users.
To ensure the safe operation of the power system, the series resonance test is applied to the AC test of large capacity power equipment (such as cables, capacitors, generators, etc.), and the use of high-voltage resonance technology to conduct power frequency withstand voltage tests on large capacity electrical equipment has become the mainstream testing method in the power market. How to determine and select series resonance test equipment is also one of the issues that power professionals are considering.
How should power companies choose a suitable series resonance testing equipment for their own use? We can use the following points to help testers choose suitable equipment:
1. This device has fully automatic function, simple and easy to operate. The original weight and volume of the equipment are greatly reduced, with a weight not exceeding 30KG. One operator can move it freely, making it easy to carry the equipment.
2. The control circuit adopts a dual processor structure, fully utilizing the efficient data processing capability of DSP chips to collect control data in real-time; Real time operation and voltage regulation, STM32 control human-machine interface, easy to operate, and intuitive display.
3. In order to prevent any overvoltage recovery, when the device experiences breakdown and flashover of the test sample, the high voltage immediately disappears and the arc immediately extinguishes due to the loss of resonance conditions. The protective circuit of the device is activated to cut off the output.
4. The dual loop control system is based on load current feedforward filtering, capacitor voltage outer loop, inductor current inner loop. Stabilize the voltage amplitude and have a good sine waveform during the scanning process.