Functional requirements for AC voltage withstand resonance test equipment applicable to substation electrical equipment

The application scope of this type of resonant equipment is NADXZ series substation electrical equipment AC voltage withstand resonant device, designed and manufactured for AC voltage withstand test of primary electrical equipment in substations with voltage withstand devices of 110KV and below. Can meet the AC withstand voltage test requirements for capacitive equipment such as transformers, GIS systems, SF6 switches, cables, and bushings according to regulations. The variable frequency series resonance test device for substations can meet the requirements of high voltage and low current equipment testing conditions, as well as low voltage and high current equipment testing conditions. It has a wide range of applications and is an ideal withstand voltage equipment for high voltage testing departments and power installation and maintenance engineering units at the prefecture, city, and county levels.

Composition and function of resonant equipment in substations

The variable frequency series resonance test device for substations mainly consists of a variable frequency control power supply, an excitation transformer, a reactor, and a capacitive voltage divider. The variable frequency control power supply adopts an imported specialized SPWM digital waveform generation chip with a frequency resolution of 16 bits, and the frequency fineness can reach 0.1Hz at 20-300Hz. At the same time, it adopts an orthogonal asynchronous fixed carrier modulation method to ensure good output waveform in the entire frequency range; The power section adopts advanced IPM modules to ensure the stability and safety of the instrument.

Equipment physical picture