Fixed-point simulation of intelligent operation algorithms on DSP for intelligent operation of breaker

Abstract

The requirements of intelligent breaker operation for signal processing are briefly introduced and the strong real-time conditions required by the intelligent breaker operation are given. IFFT(Improved Fast Fourier Transform) is applied in the algorithm simulation of rated current to reduce the calculation load.RLSCA(Recursive Least Square Corrective Algorithm) is applied to simulate the short circuit current,which enables the iteration method to be implemented on DSP with shortened sampling data window and meets the requirements of system for real time performance. A model is built with Simulink to simulate the process from normal working state to short circuit state and the total current signals are generated for two states respectively. Based on MATLAB,the short circuit current identification algorithm is simulated and,combined with IFFT and RLSCA,the total current signals are then simulated. Simulative results show that,the proposed algorithm meets the requirements of intelligent breaker operation for strong real-time performance.