城镇自来水厂智能供水系统的研究与应用

发布时间：2018-06-20 16:57

本文选题：变频调速 + 模糊控制　；参考：《西安科技大学》2017年硕士论文

【摘要】：目前水厂通过变频技术来调控水泵机组来达到高效节能的目的,但多数厂家在控制策略上缺乏先进的智能算法,并存在着水厂之间信息共享不畅,户外数据综合采集能力低下等问题。本文所设计的智能供水系统是应用于襄阳市某一分水厂,并在传统的PID控制策略上引入模糊控制思想,在应对滞后、时变的非线性系统时,具有较强的复杂工况适应性和优良的鲁棒性。而在数据的综合管控能力上,系统通过云平台提高了管网数据采集效率,并实现了信息资源高度共享功能。文中在MATLAB中对供水对进行建模与仿真,验证了模糊PLD控制器在供水应用中的可行性,并重点分析了 P、I初始参数及4个比例因子对控制器品质的影响,确定出较佳的控制参数。在上位机监控设计上,系统选用组态软件MCGS。详细罗列出各个环节的开发流程,并通过模拟报警事件验证了供水系统监控界面的可靠性。在硬件设计上,系统以PLC作为条件控制和数据处理的核心,分别对供水控制主电路,自动控制电路、手动控制电路进行重点说明。在云监控设计,系统采用GPRS技术把实时数据向云端远传,在实地中校验、测试并运行。最后,本文以0.30MPa作为恒定水压设计指标,规定控制精度在5%以内,通过多次在现场中对所安装的设备进行调试和完善后,整个供水过程水压变化平稳,调整时间短,没有过大的超调量且系统抗干扰能力增强。经过对水压曲线的整理及分析,其控制精度在1.25%,符合了工程规定要求。
[Abstract]:At present, water plants use frequency conversion technology to control pump units to achieve the purpose of high efficiency and energy saving. However, most factories lack advanced intelligent algorithms in control strategies, and there is a lack of information sharing among water plants. Outdoor data collection ability is low and so on. The intelligent water supply system designed in this paper is applied to a sub-water plant in Xiangyang city, and the fuzzy control idea is introduced into the traditional pid control strategy. It has strong adaptability to complex working conditions and excellent robustness. The system improves the efficiency of data collection through cloud platform and realizes the function of sharing information resource highly. This paper models and simulates the water supply pair in MATLAB, verifies the feasibility of the fuzzy PLD controller in the application of water supply, and emphatically analyzes the influence of the initial parameters and the four proportion factors of PUI on the quality of the controller, and determines the better control parameters. In the upper computer monitoring design, the system selected configuration software MCGS. The development flow of each link is listed in detail, and the reliability of the monitoring interface of water supply system is verified by simulating alarm events. In hardware design, PLC is used as the core of condition control and data processing. The main circuit of water supply control, automatic control circuit and manual control circuit are emphasized. In the cloud monitoring design, the system uses GPRS technology to transmit real-time data to the cloud, verify, test and run in the field. Finally, this paper takes 0.30MPa as the constant water pressure design index, prescribes the control precision to be less than 5%. After debugging and perfecting the installed equipment many times in the field, the water pressure changes steadily and the adjustment time is short during the whole water supply process. There is no overshoot and the anti-jamming ability of the system is enhanced. Through the analysis of the water pressure curve, the control precision is 1.25, which accords with the requirements of the project.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TU991.62

【参考文献】