Design of New Intelligent Controller for Low-Voltage Circuit-Breaker Based on DSP

Introduction was made to the hardware and software design of a kind ofintelligent controller for low-voltage circuit-breakers based on high performance 16-bit processor,DSPIC30F6011A.The three point intersection algorithm was used to calculate the effective values of electrical parameters.The action response time of short circuit current was improved greatly.The intelligent circuit-breaker not only realized the basic protection functions,but also monitored the field parameter of low-voltage distribution system and regional chain functions were realized with improvement of the system's reliability.The circuit-breaker could communicate with the monitoring system through the field bus to meet the requirements of low-voltage distribution system at present.