共查询到20条相似文献,搜索用时 62 毫秒
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随着GSM网络在国内的大力发展及整个社会节能意识的增强,针对新型低压电器中的手机短信故障报警服务这一背景,通过低功耗的MSP430G2231单片机及GSM无线通信TC35i模块设计了短信收发系统,以实现对电器设备的监控.短信收发系统的设计包括了原理介绍、硬件设计及软件设计各部分.短信收发系统中,MSP430G2231单片机与TC35i采用串口连接,单片机与监控机使用RS232进行通信.通过对硬件及软件的微小变动,短信收发系统还可以扩展到其他需要无线远程通信的工业系统中. 相似文献
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配电监测系统的短消息模块应用 总被引:7,自引:0,他引:7
叙述了利用现有GSM网络资源,应用移动通信业务中手机短消息的数据传输方式,实现对城市配网的监视和遥测。介绍了配网监测系统的组成、GSM SMS模块的功能指标及工作流程。该模块在电力监测系统领域中具有数据无线长距离传输、可靠性好、方便快捷等优势。 相似文献
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研究了基于状态观测器的电力系统阻尼控制器设计方法.建立了包含4阶发电机模型和3阶励磁系统模型的多机电力系统线性化状态方程,并计算出其矩阵A的特征值和系统阻尼比.通过观察系统的阻尼强弱,根据所要求配置的极点,采用全维和降维状态观测器方法,求出观测器增益和系统反馈增益进行反馈控制.该方法的优点在于不需要测量系统的所有状态变量.在4机2区算例中,求出2种观测器的综合闭环系统的零输入响应,通过比较估测值与实际值的变化情况,验证了该方法改善电力系统阻尼特性的有效性. 相似文献
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燃料电池发电装置能量管理控制系统设计 总被引:10,自引:2,他引:8
针对燃料电池动态响应上的不足,该文探讨了燃料电池发电系统中的能量管理控制系统的设计方法。讨论能量管理控制系统的结构和控制器的设计,提出了一种基于电流间接控制的能量管理控制方式。建立了能量管理控制系统的控制模型,重点分析了控制系统中电流控制环路的设计方法。针对能量管理的需求,设计了一套基于状态转移控制能量管理的控制算法用于管理超级电容中的能量。建立了5 kW燃料电池发电系统,通过实验验证了所设计的能量管理控制系统的有效性。 相似文献
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给出了市局级供电企业管理信息系统(MIS)总体设计的目标,按企业管理现状进行了子 系统划分,在两个市局级供电企业MI S开发经验以及与用户多次交互的基础上,总结了各子系统的主要功能,设计了物理系统 和数据库系统。 相似文献
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《Electric Power Systems Research》1995,35(1):59-64
The protection of power system elements has become more complicated and it is difficult for design engineers to design perfect protection systems. Qualified engineers feel they are under much more pressure at work because they are expected not only to be use their old skills and experience, but must also take in new technological information at the same time. However, expert system technology is a promising approach to help to do some or most design tasks. This paper proposes an expert system for designing the protection system of a transformer by making use of a support tool, OPS83, with a graphical menu and a friendly interface. The developed expert system is applied to the design work of Henan Electric Power Design Institute in China (HEPDIC) to check its operation. 相似文献
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管理信息系统的数据库设计是其组建的核心问题,为保证运行系统的安全、可靠、实用性,介绍了送电管理信息系统的功能及内容,针对该系统的特点和要求,提出了基于UML的需求分析方法和采用PowerDesigner设计工具进行数据库设计,阐述了系统数据库的结构特点,即C/S/S与B/S/S3层结构相结合,实践证明,这些设计方法有效保下了系统的顺利运行。 相似文献
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基于现场总线技术的远程分布式环境监测系统设计 总被引:1,自引:0,他引:1
介绍一种基于 LonWorks 现场总线技术的远程分布式环境监测系统的设计实现。利 用广泛覆盖的 PSTN(公众交换电话网),将分散的各监测点连接成实时监测网络。分析了 Lon- Works 技术的特点,介绍了系统的结构,给出了采集节点的软硬件设计和系统的软件设计。 相似文献
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T. C. Yang 《International Journal of Electrical Power & Energy Systems》1991,13(6):298-302
A new power system stabilizer (PSS) design method for single-machine infinite-bus systems is developed. This design method not only assigns the poles corresponding to the electro-mechanical oscillation modes in the system, but also locates other system poles in suitable places in the s-plane. The design procedure is used first to translate a PSS design problem to an equivalent constant output feedback controller design problem for a single-input multi-output (SIMO) system. Then, a new algorithm developed in this paper is applied to design a constant output feedback controller to achieve the desired closed-loop system pole locations. Finally, the controller gains are transferred back to the parameters in the PSS. The extension of the method to multi-machine power systems is also illustrated. 相似文献
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Design of a robust PID-PSS for an uncertain
power system with simplified stability
conditions 下载免费PDF全文
In a deregulated power system uncertainty exists and lack of sufficient damping can lead to Low Frequency
Oscillations (LFO). The problem can be addressed using robust Power System Stabilizers (PSS). In this paper, an
optimal procedure to design a robust PID-PSS using interval arithmetic for the Single Machine Infinite Bus (SMIB)
power system is proposed. The interval modelling captures the wide variations of operating conditions in bounds
of system coefficients. In the proposed design procedure, simple and new closed loop stability conditions for an
SMIB interval system are developed and are used to design an optimum PID-PSS for improving the performance of
an SMIB system. The optimum PID-PSS is attained by tuning the parameters using the FMINCON tool provided in
MATLAB. The robustness of the proposed PID-PSS design is validated and compared to other notable methods in
the literature when the system is subjected to different uncertainties. The simulation results and performance error
values show the effectiveness of the proposed robust PID-PSS controller. 相似文献
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随着电力系统电网结构日益复杂和大容量机组增多,以往发电厂中同期系统的设计理念已无法适应这一变化。简述了同期系统常见模式,分析了传统同期接线设计中存在的问题及改进。在此基础上,结合新型同期装置,提出大型发电厂同期系统设计的新方案及需要与其他方面协调的各类问题。 相似文献
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The design concept and use of the power system toolbox (PST), a Matlab-based power system dynamics simulation and control design package, are discussed. The motivation for developing the package was to provide a flexible environment for teaching power system simulation techniques and control design concepts to advanced undergraduate and graduate students, and for graduate students to perform research and development on power systems. The authors discuss the capabilities of PST and the software development philosophy. Sample applications are given. Some potential educational usage is suggested. The future enhancement to the package is outlined 相似文献