无人值守换热站智能控制系统的研究

发布时间：2018-01-13 02:21

本文关键词：无人值守换热站智能控制系统的研究　出处：《大连海事大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着集中供热的普及和发展,换热站作为连接热源和热用户的枢纽,对于整个系统的高效运行承担着承上启下的日益重要的作用。但我国大多数换热站仍然是人工操控,自动化程度较低,仅仅处于现场控制的阶段；运行管理粗放,没有统一的量化供热指标,造成了系统热效率低、热用户供热品质差的现象。尤其是当热用户实施终端的主动节能控制时,热负荷的变化不可避免的造成二次管网的压力波动,因此对换热站的安全性控制指标也提出更高的要求。本课题基于大连某高校的换热站改造工程,首先对换热站的供热调节理论进行深入的分析,研究在不同室外温度下的热负荷需求与二次网供回水温度间的关联关系,建立了基于理论预测和统计分析的热负荷目标函数。以换热站设计参数计算的采暖热负荷值作为理论供热指标,以供暖季的历史数据利用最小二乘热预测方法得到的统计热负荷值作为指导供热指标。具体建筑物的实时热负荷还受综合室外温度即太阳辐射、风速等气象条件的影响,本系统通过引入综合室外温度优化和时间修正的双重补偿功能,得到更为切合实际需求的实时热预测需求指标。其次,针对无人值守换热站的智能控制系统实现了网络化的监控与管理。分布式控制与集中管理相结合,对取热、送热、补水、泄压四大环节统一设计了智能P-P控制、三态控制、热量控制等算法库,可方便进行组态选择。实现了二次网供回水平均温度的控制,热负荷的合理预测,节电节能的变频控制。并集成3G通讯技术以及网络视频技术对多换热站进行监管,提升了供热运行的技术水平和管理水平。运行表明,该换热站控制系统为无人值守提供安全可靠的技术支撑。有效实现了减人增效,具有良好的安全性和可靠性；通过智能调节改善大滞后系统的控制效果,提高热舒适性并实现节能；网络化的数据和视频监控平台不仅可实现热负荷的动态分配,而且提升了对操作者、对设备、对运行过程的管理水平。
[Abstract]:With the popularization and development of the central heating system , the heat exchange station is used as the junction of connecting heat source and heat user , and has an increasingly important role for the efficient operation of the whole system . However , most of the heat transfer stations in China are still manually operated , the degree of automation is low , only in the stage of on - site control ; the operation management is rough and the heating quality of the heat user is poor . Especially when the active energy - saving control of the terminal is carried out by the hot user , the change of the heat load inevitably causes the pressure fluctuation of the secondary pipe network , so that the safety control index of the heat exchange station also puts forward higher requirements . Based on the transformation project of heat transfer station in a university in Dalian , the heat supply regulation theory of heat transfer station is analyzed deeply , and the heat load target function based on theoretical prediction and statistical analysis is established . The real - time thermal load of the building is also influenced by meteorological conditions such as solar radiation and wind speed . The real - time thermal load of the building is also influenced by the weather conditions such as solar radiation and wind speed . Secondly , the intelligent control system for unattended heat transfer station realizes the network monitoring and management . The distributed control and centralized management combine the intelligent P - P control , the three - state control and the heat control algorithm library to design the intelligent P - P control , the three - state control , the heat control and so on . It realizes the control of the average temperature of the return water of the secondary network , the reasonable prediction of the heat load , the energy - saving and energy - saving frequency conversion control . The operation shows that the control system of the heat exchange station provides safe and reliable technical support for unattended operation , effectively realizes the reduction and synergy , has good safety and reliability , improves the control effect of the large lag system through intelligent adjustment , improves the thermal comfort and realizes energy conservation ; and the networked data and video monitoring platform not only can realize the dynamic distribution of the thermal load , but also improves the management level of the operators , the equipment and the operation process .

【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU995;TP273.5

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