应用改进FFT算法实现风电场谐波的检测  

Using an Improved FFT Algorithm to Detect Harmonic in a Wind Power Plant

作　　者：李朝生[1] 周进有[2] 李先允[1] 

机构地区：[1]南京工程学院电力工程学院,南京211167 [2]中兴通讯股份有限公司南京公司,南京210012

出　　处：《电测与仪表》2010年第11期12-16,共5页Electrical Measurement & Instrumentation

基　　金：江苏省自然科学基金(BK2008366);南京工程院校级科研基金(QKJC2009008)

摘　　要：为了监测风力发电站产生的电力谐波,分析一种基于加窗插值快速傅里叶变换(FFT)理论的谐波检测方法,本文采用TMS320F2812 DSP同16位AD转换芯片ADS8364相结合来实现上述算法,利用TMS320F2812的高速性和ADS8364的高精度及采样频率可变性;在人机交互方面,单独采用一片AVR单片机ATMEGA16L控制键盘和液晶显示,DSP与AVR单片机之间通过SPI总线进行通信;设计了大容量的FLASH存储器用来存储历史数据;在数据通信方面,设计了以太网通信接口,RS232以及RS485串行通信接口,方便数据传输。实验结果证明了本方法的可行性与精确性,具有很好的实用价值。In order to detect the harmonic of a wind power plant,the harmonics analyzing method based on an improved fourier transform is brought forward in this paper,which is fit for this system.To realize the arithmetic which mentioned above the system integrates DSP TMS320F2812 and 16-bit AD converter chip ADS8364.It utilizes the high speed performance of TMS320F2812.It also utilizes the performance of high precision and ability of adjusting sampling rate of ADS8364.At the aspect of human-computer interaction,this paper uses a separate AVR single chip ATMEGA16L control the keyboard and LCD display so as to reduce the mission of DSP.DSP and AVR single chip use SPI bus to communicate.This paper designs large-capacity flash memory used to store historical data.In data communications,this paper designs the Ethernet communication interface,USB circuit,RS232 and RS485 serial communication interface to facilitate data transmission.The feasibility and reliability are validated by practical data test.

关 键 词：风电站 电力谐波 快速傅里叶变换 DSP 检测 

分 类 号：TM933[电气工程—电力电子与电力传动]