【作者】 毛建生；

【导师】 赵燕伟； 楼建勇；

【作者基本信息】 浙江工业大学 ， 机械电子工程， 2008， 硕士

【摘要】 近年来,为了促进小型水电站实现自动化控制,对已建水电站更新技改,进行必要的增容,扩大效益,促进小型水电站的自动化水平的提高。大多数小型水电站采用以常规控制装置与计算机监控相结合的控制方式。由于每个小型水电站的工况、要求不同,使得不同水电站的控制系统有较大的差异。浙江天台桐柏水电站是建于70年代的坑道式水电站,其采用常规设备,运行维护工作量大,安全性能较差。我们用基于GE90-30PLC水电站控制系统进行改造。本文分析的是天台桐柏水电站现地控制系统部分。本文首先分析了国内外水电站控制系统发展概况,简述了水电站控制系统的总体构架、PLC数据采集处理、系统配置。然后,综合目前国内外小型水电站中使用的各种PLC,结合浙江天台桐柏水电站的实际工况,确定现地控制系统由一体化工控机,GE90-30PLC和电量交流采样装置等组成的高性能可编程控制器。依据功能分析,硬件部分实现系统配置结构。软件的实现方面,采用流程方式进行编写,引入了流程指针的方式进行顺序控制,同时在每一步流程中引入流程中断的中继,最终实现水电站现地控制的要求,实现电站无人值班(少人值守)的运行方式。最后本文针对水电站自动化系统的发展趋势进行展望。更多还原

【Abstract】 In recent years, the automatic level of small hydropower stations improved increasingly with the technical reformed and necessary capacity enhanced. Most small hydropower stations combined the general control devices with computer monitored system to realize the automatic control. The control system of different hydropower stations has the distinct characteristics because of the various work conditions and operating requirements. The Tongbai power plant of Tiantai city was a undermined hydroelectric station which was constructed in 1970’s. The Tongbai station needs more maintenance work and which security is worse at the same time by reason of the adoption of the routine equipments. This paper rebuilt the hydropower station based on the GE90-30 PLC control system and analyzed the local control unit part of the station.Firstly, the thesis summarized general situation of the hydropower station control system at home and abroad, and illuminated the general frame of control system and PLC’s date acquisition, processing and configuration. Considered all kinds of PLC in small hydropower stations and the practical work condition of Tongbai station, the local control system was designed as a high-power programmable controller which comprised industry computers, GE90-30 PLC and electric energy AC sampling devices. According to the function analysis, the hardware part has the modular structure. The program was compiled with the flow manner and the flow pointer was imported to implement the sequence control. The relay interruption was used in every flow step simultaneously to achieve the requirements of hydropower station local control and the unattended operation mode. The trend of development of hydropower station automatic control system was prospected at last.更多还原