节点文献
三峡—葛洲坝梯级水电站模型自动测控系统
Automatic Measurement and Control System of Sanxia-gezhouba Cascade Hydropower Station Model
【作者】 罗艺；
【导师】 刘文中；
【作者基本信息】 华中科技大学 ， 检测技术与自动化装置， 2012， 硕士
【摘要】 自三峡电站全面运行以来，三峡水利枢纽上下游运行的深层次问题开始逐步凸显，某些关键问题的研究迫在眉睫。位于宜昌前坪实验基地的三峡-葛洲坝梯级电站日调节模型作为国内目前唯一的梯级电站调度实验研究平台，在模拟三峡-葛洲坝梯级电站调度方面起到了关键性作用，为梯级电站联合调度提供了强有力的技术支持。本文的目的是对模型上原有的测控系统进行技术升级改造，以提高模型平台的自动化水平和实验精度。模型的测控系统从上游至下游分为三个部分：三峡流量控制系统、两坝间水文信息采集系统和葛洲坝流量测量与坝前水位控制系统。从工业组态的角度来看，系统可以分成三个层次：底层仪表级、中间控制器级和上位机监控级。上位机组态监控系统Kingview和西门子s7-200PLC控制器构成了整个系统的核心，监控所有现场仪器与执行器，并保存历史数据信息。实现了三峡进水流量的PID控制，并就控制效果进行了分析，总结出了传统纯PID控制器的优缺点。引入并设计了模糊PID控制器，对传统纯PID控制器和模糊PID控制器进行了仿真。分析仿真波形后发现，在对动态性要求较高的场合，模糊PID控制器要优于传统纯PID控制器。
【Abstract】 Since the three gorges hydropower station has been fully operational, the deepproblems of the operation gradually highlight. Some critical puzzles are eager to solve.The model of the three gorges-gezhouba cascade hydropower stations daily regulationwhich located in Qianping, Yichang, is the unique platform on regulation of cascadehydropower stations in china. It plays a key role in simulate regulation of threegorges-gezhouba hydropower stations, so that it offers strong support for theirregulations. This thesis is focused on the technology upgrading of the former measuresystem, whose purpose is to improve the level of automation and precision of the formersystem.The measure system includes three parts: three gorges flow control system,hydrological information acquisition system between two dams, flow measurementsystem and water level control system of gezhouba. From the perspective of industrialcontrol, the system has three levels: bottom instrument level, controller of intermediatelevel, upper monitoring level. The core parts of the system are upper monitoring softwareand intermediate controller, which are made of Industrial configuration softwareKingview and siemens s7-200PLC, respectively. Their tasks are monitoring theinstruments and controlling the actuator.Realized the PID control of three gorges flow, after analyzed the results of the PIDcontroller, draw a conclusion about its advantages and disadvantages. In order to acquiremore accurate control system, introduce and design a fuzzy PID controller. Aftersimulating the pure traditional PID controller and fuzzy PID controller, we analyzed theresults and came to a conclusion: fuzzy PID controller is more useful and suitable in theconditions which are more demanding in dynamic performance.