A Novel Impulsive Transient Suppression Device Based on TVS Array

Impulsive transient badly influences power system and electrical equipments at aspects. A novel TVS array based impulsive transient suppression device with straightforward structure and easy control strategy that works on 220 V (phase voltage) power line to protect low voltage apparatus is proposed in this paper. Through analyzing characteristics of transient voltage suppressor (TVS), the idea of this TVS array based novel transient suppression device, which works under the synchronization with power line voltage and employs economical TVS array as its actuator, is proposed. The design and implementation of hardware of device, which consists of actuator part, voltage transformation part and controller, is introduced. Grounding of this device is also described. The synchronization algorithm employs hybrid digital filter that consists of median filter and predictive FIR filter, and the way of determining of length of predictive FIR filter is described. The straightforward control strategy of this device is introduced. The simulation results show effects of this novel device with different TVS array compared with device with a single TVS, and demonstrate that this device has better performance.