【作者】 高建民；

【导师】 张英；

【作者基本信息】 河北工业大学 ， 检测技术与自动化装置， 2007， 硕士

【摘要】 随着电力系统容量的不断增大和系统结构的日渐复杂,对电力系统自动控制技术的要求进一步提高。准同期装置作为一种常用的自动装置在电力系统并列操作中起重要作用。实际系统中不符合同期条件的并列操作将会带来极其严重的后果,引起发电机损伤甚至系统崩溃。为了保证电力系统安全稳定的运行和满足用户对电能质量的要求,研究开发新型智能的同期装置也愈来愈迫切。本课题通过对准同期条件的理论分析,结合工程实际应用的需要,设计完成了一种基于Microchip公司dsPIC30F系列DSC数字信号控制器的自动准同期装置。装置主要完成同期操作控制、并列条件的检测与判断、并列条件的促成、合闸时机计算、CAN、RS485?和以太网通讯、液晶显示等功能。本文介绍了所设计的自动准同期装置的硬件组成和软件实现方法。在硬件设计中,本文介绍了硬件的整体构成,详细介绍了电压采集电路、开入开出电路、电源电路、CAN?通信电路、RS485?通信电路、以太网电路和液晶显示电路等,也详细介绍了?DSC?数字信号控制器及其他相关元器件的功能和应用。在软件设计中,本文详细介绍了同期程序、电压采集程序、液晶显示程序、以太网通信程序、CAN通信程序和?RS485通信程序等,也介绍了交流采样算法和TCP/IP协议等相关内容。最后,对所设计和制作的自动准同期装置进行了总结,指出所存在的不足和可以改进的地方。更多还原

【Abstract】 With the growing of the power system,it is necessary to promote the technology ofautomatic control of power system. The automatic quasisynchronizationdevice takes main rolein the power system. Panelling in the incorrect point will bring serious system accident or eventhe system breaking down. To guarantee the security and stability of the power systemoperation and the quality of the electric power, the research and development of new intelligentdevices will become increasingly urgent.This topic analysed the theory of quasisynchronization,combined with the actual projectapplication, designed a automatic quasisynchronizationdevice which was based on thedsPIC30F families of DSC digital signal controller of Microchip Inc..The device functionincluded control the paralleling,measuring and judging condition,quicken the parallel conditionto come,counting the paralleling time point,CAN, RS485 and Ethernet communications, liquidcrystal displays and so on.This article introduced the hardware components and software implementation of thedesigned automatic quasisynchronizationdevice. In hardware part, this article described indetail the voltage sampling circuit,doinand dooutcircuits, power circuit, CANcommunication circuit, RS485 communication circuit, Ethernet circuit and LCD circuit,alsodetailed the functions and applications of DSC and other related components. In software part,the article described in detail the synchronization program, voltage sampling program, LCDprogram, Ethernet program, CAN program and RS485 program, also introduced the ACsampling algorithm,the TCP / IP protocols and relevant information.Finally, the article summarized the design and production of automaticquasisynchronizationdevice, pointing out where shortcomings exist and it can be improved.更多还原