Research on the Intelligence High-Voltage Circuit Breaker Based on DSP

In this paper an intelligence recloser with faults breaking and synchronizing make function based on DSP is presented. During breaking the short circuit current, the current change rate is adopted to judge whether the short circuit taking. In this paper the four reclosing possibilities are analyzed and simulated in order to find the voltage optimum inputting angle, at the same time short circuit faults are analyzed and simulated in order to diagnose and distinguish fault´s kinds. Furthermore the digital filtering based on the improved Fourier transformations (IFFT) is used to estimate the optimal reclosing angle so as to weaken the instantaneous current during reclosing circuit. Based on DSP technology, the hardware circuit has been set up and the software has been programmed. And the experiments show that it is effectively to reduce the making current and obviously to improve circuit breaker´s performance