摘要
“1MW风力发电变流器实验平台研制”是校211工程项目,能实现1MW的全功率变流器并网实验和600kW的PWM整流器和逆变器的组合实验。本课题作为该项目的一部分,主要进行风力发电变流器实验平台监控系统部分的设计,实现对整个实验平台的监控和保护。
本文首先根据风电实验平台监控系统的要求进行系统的方案设计,将整个监控系统分为了数据采集系统和PLC控制系统两部分;然后进行数据采集系统的设备选型和硬件电路设计;在此基础上,基于VC++6.0的多线程技术,开发了数据采集系统的控制软件,实现对23路关键点电压、电流信号的实时采集、记录和分析,还具有功率测量,谐波分析,波形显示、存储和回放的功能;接下来,以PLCS7-200为核心开发了PLC控制系统,包括设备的配置、接线和控制软件等,实现对整个实验平台的操作控制和状态显示。
整个监控系统功能强大、信息量丰富,人机界面友好且操作方便,实验过程中运行良好,达到了设计要求,证明了硬、软件系统设计的正确性和可行性。
The project "1MW Wind-power Generation Converter Experiment Platform" is supported by 211 plan of our university. It can implement 1 MW rated experiment of two feeding inverter and 600kW rated rectifier-inverter combined experiment. As an important part of the whole project, this work aims to design and implement the monitoring and control system, realizing the supervising and protect of the plant.
According to the requirement of the plant monitoring and control system, the detailed technical scheme is designed, in which the monitoring and control system is divided into data collecting & analyze subsystem and PLC control subsystem. First, the hardware circuit is designed and equipments are chosen. Then, based on multithreading technique of VC++6.0, the data collecting software is developed. It can realize data collecting, recording, and analyze of twenty-three key signals, as well as the function of power measurement, THD calculating, and waveforms display/memorize/recall. Second, the PLC control subsystem is developed based on PLC S7-200. It's used to finish the control of the plant and display of plant states. In this part, the main task includes the configuration of the PLC, arranging the wire, and developing the software of PLC.
The monitoring and control system has the feature of abundant supervising information, friendly interface and convenient operation. It works well in the practical experiments, can completely meet the design requirements, the hardware and software both have high reliability.
引文
[1]耿华,杨耕,崔扬等.并网型风力发电系统的现状与发展.东方电气评论,2006(2):1-7.
[2]盛双文.大型风力发电机组中央控制系统的研制.中国科学研究院,2001.
[3]杨慧颖,邬嘉鸣,张波等.风力发电中电力电子技术的应用.山东电力高等专科学校学报,2005(4):59-62.
[4]马海潮.超高速数据采集技术发展现状.测试技术学报,2003(4):287-292.
[5]来文洁.飞机电源系统供店参数测试与分析研究.西北工业大,2003.
[6]龙翔.利用Visual C++开发含水层储能装置的监测系统.上海交通大学,2005.
[7]孙鑫,余安萍.VC++深入详解.北京:电子工业出版社,2006.
[8]马云华,蒋光林.航天器推力器测试台高速实时数据采集系统的设计与实现.航天控制,2005(6):62-65.
[9]沈兰荪.数据采集技术.合肥:中国科学技术大学出版社,1990.
[10]马明建,周长城.数据采集与处理技术.西安:西安交大出版社,1998.
[11]徐科军,陈荣保,张崇巍等.自动检测和代表中的共性技术.北京:清华出版社,2000.
[12]余鸿,熊卫红,董肖红.一种保护用软件频率跟踪算法的分析与改进.华中电力,2002(2):3-7.
[13]丘关源.电路.北京:高等教育出版社,1979.
[14]胡文军.电能质量监测与分析虚拟仪器的研制.山东理工大学,2003.
[15]刘金华,刘永强.非正弦条件下无功功率定义分析与展望.电测与仪表,2006(3):1-4.
[16]Byung G.Jo and Myung H.Sunwoo.New Continuous-Flow Mixed-Radix(CFMR)FFT Processor Using Novel In-Place Strategy.IEEE transactions on circuits and systems,2005(5):911-919.
[17]J.A.Hidalgo,J.Lopez,F.Aruguello,and E.L.Zapata,"Area-efficient architecture for fast Fourier transform," IEEE Trans.Circuits Syst.Ⅱ.,Analog Digit.Signal Process,1999(2):187-193
[18]周刚.电能质量实时监测系统的研究与软件设计.华中科技大学,2004.
[19]姜建国,曹建中,高玉明.信号与系统分析基础.北京:清华大学出版社,2004.
[20]刘敏,王克英.基于加窗双峰谱线插值的高精度FFT谐波分析.电测与仪表,2006(3):20-23.