共查询到20条相似文献,搜索用时 78 毫秒
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水电站网络监控系统中线程通信技术 总被引:2,自引:0,他引:2
利用线程技术实现水电站监控系统的实时通信,讨论了串口异步通信技术,开发了基于Windows95的水电站网络监控的网络通信模块。 相似文献
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分析了当前电力系统监控网络中存在的问题,提出了解决方案——应用可兼容多种总线结构和协议自适应方法,建立以以太网为中心、多层次多协议结构并存的综合工业监控网络。介绍了综合工业监控网络的软硬件结构,分析了整个网络中不同结构之间的数据冗余、流量控制和安全等问题。运行结果表明:该网络能更好地进行现场设备控制和管理,为实现真正用户终端级的、高安全性的控制提供了一个新的解决方案。图5参5 相似文献
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燃气发电站远程监控系统 总被引:1,自引:0,他引:1
燃气发电站远程监控系统利用网络技术和计算机技术实现了三个方面的功能,即对现场的视频监控、对燃气发动机的远程监控和发动机运行参数数据的远程传输,经过现场使用证明,取得了良好的效果,提高了电站的综合管理水平。 相似文献
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煤矿生产中存在着较多的安全隐患,如果出现安全事故,将会给工作人员带来生命威胁,给企业带来巨大的经济损失。将网络技术应用于煤矿安全监测监控中可以取得良好的效果。对网络技术在煤矿安全监测监控中应用的优势进行了分析,并对煤矿安全网络监控系统的构成、原理和网络安全监控信息管理系统进行了探讨。 相似文献
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This paper presents an adaptive supervisory control strategy for a fuel cell/battery-powered city bus to fulfill the complex road conditions in Beijing bus routes. An equivalent consumption minimization strategy (ECMS) is firstly proposed to optimize the fuel economy. The adaptive supervisory control strategy is exploited based on this, incorporating an estimating algorithm for the vehicle accessorial power, an algorithm for the battery charge-sustaining and a Recursive Least Squares (RLS) algorithm for fuel cell performance identification. Finally, an adaptive supervisory controller (ASC) considering the fuel consumption minimization, the battery charge-sustaining and the fuel cell durability has been implemented within the hybrid city buses. Results in the “China city bus typical cycle” testing and the demonstrational program of Beijing bus routes are presented, demonstrating that this approach provides an improvement of fuel economy along with robustness and ease of implementation. However, the fuel cell system does not leave much room for the optimal strategy to promote the fuel economy. Benefits may also result in a prolongation of the fuel cell working life, which needs to be verified in future. 相似文献
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基于MVB总线的机车网络中央控制单元软件设计 总被引:1,自引:0,他引:1
阐述了一种基于MVB总线的机车网络设计的简要原理,简单介绍了这套网络设计的拓扑结构,重点介绍了其中央控制单元的软件设计。 相似文献
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Artificial neural network (ANN), in comparison with PID controllers which have broad applications in the highly complex HVAC systems, has recently received more attention. The present paper includes thermodynamic modeling of an evaporative condenser under steady state and transient state conditions for establishing control of thermal capacity, using Artificial neural network. To train the system under dynamic condition, predictive neural network, capable of understanding dynamic behavior and predicting the preset output is used. The principle operation of such neural networks is based on the reduction of gradients of errors existing between the predicted output and the actual output of the system. To control the system thermal capacity, neural controller based on training received from the reduction of gradients between the output controller and the ideal output, is used. Results obtained during present investigation indicate that artificial neural network controller is suitable substitute for PID controllers for thermal systems. 相似文献
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Research on the optimizing control technology based on fuzzy-neural network for hydrogen-fueled engines 总被引:4,自引:0,他引:4
Zhenzhong Yang Lijun Wang Shusheng Xiong Jingding Li 《International Journal of Hydrogen Energy》2006,31(15):2370-2377
Hydrogen fuel is regarded as one of the most promising alternative fuels for automobiles in future. Technology of the optimum control on hydrogen-fueled engines is a key to improve its performances in every respect. In this paper, based on the experiments, the policy of optimum control on hydrogen-fueled engines has been shown. Moreover, a new optimizing control model on hydrogen-fueled engines has been constructed, in which ignition timing, injection timing and injection duration were separately selected as control variation, and output power and rate of fuel consumption are separately chosen as performance index function. Further, a new method ingeniously adopting fuzzy-neural network (FNN) system to calculate the optimizing control laws for the optimizing control model has been designed, and a series connection control system has been set up, which is composed of FNN controllers combined with an adaptive controller for ignition timing to realize open-loop or closed-loop control pattern with stepping regulation of ignition timing. Last, the calculated results of the control variations with an improved FNN system were contrasted with experimental results; the contrasting result has shown that the maximum absolute error is less than 1 °C A, the maximum relative error is less than 5%, mean square error is 0.381 °C A. Therefore, the calculation method with FNN system is practical and satisfactory. 相似文献
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针对换热网络具有非线性、滞后性、约束性等特性,提出将模型预测控制算法应用到换热网络的控制中,并对其滚动优化策略进行深入研究。首先,建立以综合费用最少的换热网络模型及目标函数,然后引入最速下降法对换热网络进行优化,以获得下一步的最优旁路开度,实时计算,实现换热网络模型预测控制中的滚动优化策略。通过算例证明:采用滚动优化策略能够快速、准确地计算出每一步的最优旁路开度,在保证出口温度达到目标值的同时使系统经济效益有所提升。 相似文献
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鱼跳水电站采用了南瑞自控公司的开放式分层分布监控系统,由现地控制层和电站控制层两大部分组成,该监控系统自2001年投入运行以来工作比较可靠稳定,本文主要介绍自动监控系统的结构、功能和水电站的一些运行经验及体会。 相似文献
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