H9000计算机监控系统在水电站中的应用

重庆鱼剑口水电站采用中国水电科学研究院自动化所研制开发的H9000计算机监控系统,该电站监控系统包括厂站监控层和现地控制层,使用快速双以太冈。讨论了提高系统使用效果的具体优化措施,阐述了该系统投入使用后的运行状况以及意义。同时对电站监控系统网络结构在设计、安装过程中的一些更改进行了分析比较。     

H9000 V4.0计算机监控系统技术特点概要

为了满足三峡右岸电站的应用需要，在H9000 V3.0计算机监控系统的基础上研制开发了H9000 V4.0系统，改进和完善了原系统已有功能，开发了新功能，进一步提高了系统的性能指标和可靠性指标。文中主要介绍H9000 V4.0系统的设计原则，以及数据采集、人机联系、报表定制、Web信息发布、历史数据管理等主要新功能。     

H9000计算机监控系统功能的完善

介绍了古田溪水电厂一级电站H9000计算机监控系统无通信异常实时告警的问题,巧妙地利用现有设备完善系统功能,实现了通信监视和主动告警功能,提高了实时通信监测水平.     

英国国家基金电力能源领域重大研究计划（Only in Chines）

三峡右岸电站计算机监控系统采用新一代水电站计算机监控系统H9000 V4.0，它是结合20多年的水电站计算机监控系统开发经验和优势，针对三峡右岸电站和目前巨型水电站计算机监控系统的发展新需求而开发的。文中介绍了该系统的配置，并重点介绍了其重要组成部分———现地控制单元（LCU）的结构和功能实现。     

H9000监控系统及水调系统数据通信的二次开发应用

H9000监控系统是面向对象的水电站网络型机组监控系统,在国内外众多水电站监控中均有应用。对数据通信规约进行了系统分析,通过安康水电站水调自动化系统、机组监控系统联网的实例,介绍了利用H9000监控系统数据通信进行系统开发的思路。     

H9000计算机监控系统在山美水电站的应用

山美水电站1～3#机计算机监控系统由H9000系统集成和二次开发而成，是新一代分布开放式水电站计算机监控系统，具有良好的可靠性、可扩充性、可移植性和强大的异机网络互联功能，为电站实现“无人值班（少人值守）”的目标提供了有力的技术保障。     

水电站计算机监控系统升级改造

1水电站概况紧水滩水电站(以下简称"紧站")是紧水滩水力发电厂的一级电站,总装机容量为6×50MW;电站以系统调峰,顶事故出力为主要任务。紧站原采用H9000(v1.0版)型计算机监控系统,有完整的上、     

百丈■电站计算机监控系统建设及调试

叙述了百丈电站计算机监控系统 ( H90 0 0 )的结构、控制特点及现场调试情况。 H90 0 0系统采用全分布开放式总线结构 ,具有良好的可靠性、可扩充性和可移植性 ,并且支持异型机互联。既可完成电站的自动监控 ,又可与梯调联网实现“4遥”。不但增强了电站的调控水平 ,而且获得了较好的省水节电效果。     

基于触摸屏和PLC的船舶电站监控系统设计

以XBTGT5330触摸屏、Modicon M340 PLC和并联保护单元(PPU)为核心设计交流380 V 50 Hz船舶自动化电站及监控系统,实现了PLC控制程序和人机界面软件相结合.通过网络技术将电站运行数据传送至上位计算机,为远程监控提供了重要依据.通过船舶电站实验室运行验证,该系统有效地提高了电站的稳定性和可...     

基于IEC61850标准的水电厂监控系统信息建模

文中首先简单介绍了IEC61850标准及其发展现状,分析了其在智能水电站的应用,随后阐述了IEC61850标准建模技术及模型层次结构,并结合H9000监控系统接入白山电厂智能一体化平台的实际工程,着重介绍了基于IEC61850标准构建H9000监控系统信息模型的建模技术和主要流程。最后,介绍了该信息模型接入白山电厂智能一体化平台的现场IEC61850标准通信调试及运行情况。     

On a wing and a prayer

The article talks about recent Defense Research Projects Agency (DARPA) presolicitation notice in the area of hybrid insect micro-electromechanical systems (MEMs). DARPA's goal is to fund promising interdisciplinary research that will permit the creation of "insect-cyborgs"     

利用光伏电池给蓄电池充电

磷酸锂铁（LiFePO4）电池对比钻基德Li离子/聚合物电池,具有安全性性高、浮充电压小、自放电率低、使用寿命长等一系列优点。本文所述LT36521C为可实现太阳能跟踪、单块式补偿蓄电池充电的集成电路。当LT3652由单块太阳能电池板供电时,其输入调节回路能确保在最大输出功率下工作,充分体现出这一新型太阳能充电器的优越特性。     

Making a Case for a New Connector

The emergence of quick lock connectors, particularly quick lock versions of the SMA and N connectors (QMA and QN, respectively), was an inevitable development in the RF connector industry and is of significant importance in that nearly 50% of all practical applications for RF connectors are currently supported by either SMA or N. Once QMA and QN can achieve similarity in cost and performance to the present SMA and N connectors, they will take the place of their predecessors in most applications, creating a huge new market. Our RF team has long been dedicated to research and development of these two connector types in the hopes of creating an optimal design. In this article, we will show some of the results of our research.     

Chaos in a series circuit with a nonlinear capacitor and a nonlinear inductor

This paper proposes a nonlinear circuit that generates chaotic oscillations. The proposed nonlinear circuit includes a nonlinear capacitor and a nonlinear inductor by using Generalized Impedance Converters. Both computational experiments and experiments on real circuits show that the region for chaotic oscillation is very wide, demonstrating that the proposed circuit is effective as a chaos generator. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 150(2): 35–42, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10361     

Electric potential near a tip of a local discharge on a conductive film

To develop a propagation model of a local discharge on a wet polluted insulator, the authors have examined characteristics of the local discharge on an electrolytic solution simulating the wet polluted insulator surface. The local discharge was propagated on the solution under the impulse voltage. A shape of a contacting surface between the local discharge and the solution has been already obtained by the authors. By using the contacting surface, an electric potential near a tip of the local discharge on a conductive film of 1 mm in thickness was calculated. Furthermore, the potential was measured with a probe. The calculated values and the measured values of the electric potential agreed well regardless of the propagation length of the local discharge, the width of the conductive film, the resistivity of the conductive film, the peak value of the applied voltage and the applied voltage waveform.     

Power losses in a conducting ring enclosing a conductor with a transient current

Contents In the paper Joule power losses are calculated in a conducting ring enclosing a conductor with a transient current having an alternating component.—Theoretical calculation and numerical computation are worked out basing on a link Bubnov-Galerkin method in its numerical version using the finite elements for the conductor with the Time-Stepping algorithm for the time discretization.—On the basis of numerical computation, graphs of the relative power losses are plotted as a time function.

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Leistungsverluste in einem leitenden Ring, der einen Leiter mit einem instationären Strom umschließt

Übersicht In diesem Beitrag werden die Joulschen Leistungsverluste in einem leitenden Ring berechnet, der einen Leiter umschließt, in dem ein instationärer Strom mit Wechselanteil fließt. Die theoretischen Betrachtungen und numerischen Berechnungen hat man in Anlehnung an die Bubnov-Galerkin-Methode (in ihrer numerischen Variante, die von einen Leiter unter Verwendung der Methode der finiten Elemente realisiert wird) in Verbindung mit einem Schritt-Algorithmus mit der diskretisierten Zeit ausgeführt. Auf der Grundlage numerischer Berechnungen sind Diagramme für die relative Leistung in Abhängigkeit von der Zeit dargestellt.

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List of symbols Symbol Unit Physical parameter - B Wb/m² magnetic induction vector - H A/m magnetic field intensity vector - H, H A/m -component of the magnetic field vector - E V/m electrical field vector - E _r ,E _z V/m components of the electric field - f s^–1 frequency - I A current intensity (r.m.s. value) - L H inductance - P W power losses - P ₀ W power losses for d.c. - R resistance - t sec time - ^–1 m_–1 electric conductivity of the conductor - Hm^–1 magnetic permeability - _ijk m² finite element area - basis function - rad s^–1 pulsation - N _i ,N _j ,N _k function of finite element shape - 3.141593... - region - ² Laplace's operator - r, ,z cylindrical coordinates - ^h region approximating the region - ^e finite element region - M number of discretization points of the region - V number of finite elements - (N–1) number of steps - i, j, k indices of vertices of triangular finite element     

Development of a deceleration control system for a winding machine based on a microcontroller

The development of an automatic deceleration system for a winding machine in a siderurgy factory is presented in this paper. The proposed system controls the speed of a winding machine in order to obtain the optimum stop point in terms of security and fast production. The system is based on a microcontroller and an extremely simple hardware. The system has been tested for two years and results evince a very good mean time between failures.     

Simulation of a generator for a wind-power unit

Analysis of excitation systems of generators for wind-power units is carried out, a software package for generator simulation is presented, and the sequence of the generator design is presented.     

When a feature detector becomes a feature generator

The neural network approach is reviewed in the context of studies in the animal and human visual systems. An attempt is made to explain perception, memory, and learning as a feedback loop similar to the one used in the ALOPEX optimization concept. Applications in pattern recognition and image processing are discussed. Experiments using visual evoked potentials in humans are described.