【摘要】 简要介绍了断路器智能操作对信号处理的要求,给出了断路器动作需要满足的强实时性条件。对额定电流采用改进的快速傅里叶变换进行算法仿真,减少了计算量。对短路电流采用递推最小二乘校正算法进行仿真,使迭代法可以在DSP上实现,缩短了其消耗的采样数据窗口,且其实时性仍可达到系统的要求。基于Simulink软件对系统从正常工作状态过渡到短路工作状态的过程建立仿真模型,生成了分别包含2种状态的全电流信号;然后基于MATLAB软件,先对短路电流的软件识别算法进行了仿真,再结合改进快速傅里叶变换、递推最小二乘校正算法对全电流信号进行了仿真,仿真结果证明算法可满足智能操作的强实时性要求。更多还原

【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.更多还原