微机准同期并网合闸分析研究（附外文文献及翻译）.docVIP

浙 江 科 技 学 院 本科学生毕业设计（论文） 题 目 微机准同期并网合闸分析研究 系 别 自动化与电气工程学院 专业班级 自动化 姓 名 王芳 学 号 指导教师 周国平 职 称 副 教 授 二零零六 年 六 月 九 日 摘 要 依据电压差和频率差在允许范围内，跟踪相位差，预测最佳合闸角，在导前时间，发出合闸命令，瞬间发电机和电网的相位差为0，实现发电机同期并网。采用PIC16F77单片机进行控制，设计一种准同期控制器，通过电压和频率参数调节（升压降压和升速降速）达到相位差寻优并合闸。 使用准同期控制器，可以有效防止冲击电流，防止机组受损，提高并网的速度和精度，它可靠的性能，强大的功能，将给水力发电带来更多经济效益。 关键词：相位差、导前时间、准同期、电压差、频率差。 Abstract: Suppose that voltage difference and frequency difference lie in a permitted range, the phase difference must be tracked in order to forecast the best switching on angle. At the moment of the forward time, release the command of switching on and meanwhile the phase difference between dynamo and electric net is 0. Thus, we realize dynamo synchronous incorporating in the power network. We use PIC16F77 as CPU to control the whole process and also, we try to design a preparative and synchronous controller via voltage and frequency parameters adjustment (increase or decrease the voltage and increase or decrease the speed). So that we can switch on when the phase difference is the best. The preparative and synchronous controller can effectively avoid dash current and machine group damage. Moreover, it can advance the speed and precision of incorporating in the power network. Its reliability in capability and strength in function will bring more economic benefit to waterpower industry. Key words: Phase difference、forward time、preparative and synchronous、voltage difference、frequency difference. 目录 摘要-----------------------------------------------------------------------Ⅰ 1 引言---------------------------------------------------------------------1 1.1目前状况-------------------------------------------------------------1 1.2 传统的装置和操作方法------------------------------------------------1 1.3 出现的问题-----------------------