单片机在发电机空气开关自动并网中的应用毕设论文.doc

全套设计. 摘 要 同步发电机与电网进行并列的过程是一项非常重要的工作，为了使同步发电机准确、快速地与电网并列，本课题介绍了AT89C51的性能指标和工作原理并将AT89C51为核心控制器件设计一个自动并网控制系统，使其能够对电网电压、频率进行检测与监控。系统主要由工作电源模块、单片机控制模块、电压信号调理模块、AD采样模块和MOSFET驱动模块等组成，另外此文还分析了该系统的硬件组成及软件设计。该并列装置能够对发电机和系统之间的相序作出检测, 通过软件程序的调节, 使电压差、频率差和相位差尽可能小，并网时具有快速、准确等优点，保证了电网系统在发电机并网后正常稳定的运行。 关键词：同步发电机；并网条件；自动；AT89C51； Abstract Synchronous generators and grid tied system paralleled is the key to a very important task. In order to enable synchronous generator under the conditions in the laboratory, This topic introduces the performance indexes and operation principles of AT89C51, and will use AT89C51 as a core to design a grid-connected control system which could detect and monitor the grid voltage and frequency. This system is composed by working power supply module, single-chip device control module, voltage signal conditioning module, AD sampling module and MOSFET drive module.Besides,this paper the hardware composition and software design of the device are described，it can make detection between the generator and the system phase, by adjusting the software program, so the voltage difference, frequency difference and phase difference as small as possible it’s virtue of quickly and accurately,to ensure the power system grid after the normal and stable operation. Keywords: Synchronous Generator; Grid Conditions; Automatic; AT89C51; 目 录 中文摘要...............................................................................................................I 英文摘要..............................................................................................................II 1 绪 论.................................................................................................................1 1.1 研究背景........................................................................................................1 1.2 国内外发展状况........................................................................