A Low-Noise Very Low Frequency Sinusoidal Generator

In this letter, a novel very low frequency sinusoidal (VLF -sin) generator is proposed and established based on bidirectional two-stage voltage multiplier and module which includes a resistor connected in parallel with a bidirectional HV switch (R-T module). By changing the frequency of power supply at charging stage and resistance at discharging stage, a low-noise VLF -sin waveform can be generated which can be applied to partial discharge detection (PD). A test is carried out to prove the feasibility of the generator.