【作者】 陆昊；

【导师】 胡钢；

【作者基本信息】 河海大学 ， 通信与信息系统， 2004， 硕士

【摘要】 本论文主要针对电力系统中采用的谐波测量方法而提出的一种基于锁相倍频采集方法，通过锁相环对电力波形进行实时跟踪，既解决了频谱泄漏对谐波测量精度的影响，又实现了快速的，准确的，实时性的测量。 论文首先从理论上介绍了关于电力系统检测的几种常用方法及其各自的优缺点，重要介绍其中的通过FFT变换的谐波测量方法，并讨论了该方法易产生的缺点---频谱泄漏问题，及其产生的原因，为了解决这一问题而引入了锁相倍频采集技术，使得采样与电网同步，随电网的变化而变化。解决了电力系统检测中的频谱泄漏这一难题。基于上述方案，本人设计开发了基于TMS320VC5410的电力采集检测系统。基本实现了采集、A／D转换、数字信号处理、键盘显示、异步通信等系统软硬件设计。 该系统前端采用电力系统常用的AD73360采集芯片，锁相倍频电路由锁相环CD4046与分频器CD4060一起构成，产生AD73360采集触发信号。采集与处理结果可通过液晶显示实时显示，为了与上位机通信，系统采用了串口芯片MAX3111实现DSP与CPU的UART通信。最后为了使采集系统实现脱机运行，对DSP的Bootlooder功能和FLASH的在线烧写进行了详细的介绍。更多还原

【Abstract】 The paper , for the harmonics detection method used in Power system, presents an sampling method based on frequency multiplication phase-locked. Through Phase -locked loop to track the power wave, which not only reduces the affect of spectrum leakage to the harmonics analysis, but also realizes quick .accurate and, real-time measurement.The paper first discusses several kinds of general analysis methods used in power system and one’s own pluses and minuses, Especially discusses the harmonics detection method and its apt shortcoming that produce ?Frequency spectrum leakage, and the reason produced, in order to solve this problem, the technology of frequency multiplication phase -locked is used to make sample frequency in pace with power wave frequency, and vary with power wave. The method solves the difficult problem ?Frequency spectrum leakage. Based on above-mentioned schemes, the power detection system based on TMS320VC5410 is designed , which realizes Collection, A/D, Digital Signal Processing .Keyboard .Display and UART ?The AD73360 gather chip commonly used in power system is used in front of the power detection system, and the circuit of frequency multiplication phase-locked is consisted of phase-locked loop device桟D4046 and frequency division device CD4060 to produce the gather signal of AD73360 frequently, the gather wave and result can be displayed on LCD. For communication with CPU , the SPORT chip MAX3111 is used to realize the communication of DSP and CPU, finally in order to make the power detection system put in use in fact , Bootlooder function and the on-online programming method of FLASH in DSP is described in detail.更多还原