变电站内噪声研究及控制系统设计

Research on Substation Noise and Design of the Control System

研究配电变电站内噪声的特点,发现变电站噪声能量较大的频率分量主要为500 Hz以下的100 Hz整倍数,且这些特征频率信号在一段时间内比较稳定,不会发生突变。基于FXLMS自适应有源噪声控制算法,构建和变电站主要噪声分量相关的参考信号,设计以TMS320F28335为核心处理器的变电站有源噪声控制系统,重点是自适应控制算法中相关参考信号的选择以及噪声有源控制系统的设计。在Matlab中对噪声控制算法进行仿真验证,仿真结果表明,该算法能够有效地降低在噪声中能量较大的低频信号,使降噪达到满意的效果。

Having studied the characteristics of the noise in the distribution substation,we find that the frequency component of a large substation noise energy is the integral multiple of 100 Hz below 500 Hz,and this characteristic frequency signal appears stable in a certain period of time with no mutation. Based on the adaptive active noise control technology,the reference signal related to the main noise component of the substation is established and the substation active noise control system is designed with TMS320F28335 as the core processor.The focus is on the selection of the reference signal in the adaptive control algorithm and noise control system design. The algorithm simulation is conducted in MATLAB and the simulation results show that this algorithm can effectively reduce the low frequency noise of signal energy in large substations to achieve satisfactory results.