Research and Design of Multiple Output Arbitrary Waveform Current Sources for Power Grid Fault Monitoring

In the harsh environment of high altitude and high altitude, in order to facilitate the tracking and amplification of current signals in power grid faults, and reduce the burden of maintenance personnel working at high altitude, a current source testing equipment that is convenient to carry, power supply, and can output multiple arbitrary waveforms is designed. The device can stably amplify any waveform signal within a certain frequency range, and ultimately output multiple stable current waveform signals. The process adopts a front-end DC-DC boost, a back-end DC-AC inverter, a current closed-loop negative feedback, and an effective PI control link. Focused on analyzing the parameter design of low-pass filters and PI regulators, resulting in high output waveform fidelity and fast dynamic response ability. The simulation results show that the current source testing equipment has a more stable output waveform and is more optimized than traditional switching power amplifiers.