电力智能传感器中的信号处理研究  

Research on signal processing in power smart sensor

作　　者：陈守强[1] 肖蓉川[1] 肖继学[1] 

机构地区：[1]西华大学机械工程与自动化学院,四川成都610039

出　　处：《传感器与微系统》2008年第11期38-40,43,共4页Transducer and Microsystem Technologies

摘　　要：探讨了误差最小均方(LMS)法在电力智能传感器的电压分量中的运用。提出并分析和比较了获取电力智能传感器中电压有效值和初始相位角的几种方法,指出误差LMS法因降低了对电路性能的要求而能有效地简化系统、降低成本。仿真实验表明:直接根据定义分析电力参数,需要很高的采样频率与信噪比,而利用误差LMS法在获取电压有效值时采样频率可降低3倍,在求解初始相位角时对信号中干扰幅值的要求从小于信号幅值的5%可放宽到信号幅值的15%。Application of error least mean square （LMS） method in voltage testing of power smart sensor is exploited. Several ways to obtain voltage RMB and initial phase angle, which are important power parameters but difficult to test in power smart sensor,are proposed,analyzed and compared. It is pointed out that when error LMS method is applied, the performance requirement can be declined and results in system simplified and cost reduced. Simulation results show that sample frequency and ratio of signal to noise are required very high to got power parameters according to their definition directly, however,if error LMS method is applied,the sample frequency can be declined triple when obtaining voltage RMB, and noise amplitude can be permitted from less 5 % to 15 % of signal amplitude when working out the initial phase angle.

关 键 词：智能传感器 信号处理 电压 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]