百龙滩水电厂计算机监控系统安装与调试

百龙滩水电厂计算机监控系统安装与调试廖东兴（广西大化水力发电总厂大化县５３００００）１系统设备简介百龙滩水电厂采用了日本富士电机公司生产的计算机监控系统，取消了常规的集中控制设备。整个监控系统由站控制级、现地控制级和高速数据通道组成，现地控制级则由８...     

五强溪水电厂机组现地控制单元（LCU）

五强溪水电厂机组现地控制单元（ＬＣＵ）湖南省五强溪水力发电厂田启荣五强溪电厂计算机监控系统为美国兰吉尔（ＬＡＮＤＩＳ＆ＧＹＲ）公司设计生产。系统按无人值班设计，取消常规集中控制，全部用计算机控制，该系统由主控级和现地控制级组成，采用冗余分层分布式结构...     

三峡永久船闸集中监控系统结构分析与比较

在三峡水利枢纽中 ,永久船闸肩负着繁重的通航任务 ,在考虑其控制系统方案时 ,必须着重考虑其可靠性与先进性。永久船闸的集中监控系统适宜采用集散型计算机监控系统 ,系统分为现地控制层与集中控制层两层。本文提出了系统网络、现地控制层以及集中控制层的几种配置方案 ,并进行了分析与比较。     

三峡永久船闸集中监控系统结构分析与比较

在三峡水利枢纽中,永久船闸肩负着繁重的通航任务,在考虑其控制系统方案时,必须着重考虑其可靠性与先进性.永久船闸的集中监控系统适宜采用集散型计算机监控系统,系统分为现地控制层与集中控制层两层.本文提出了系统网络、现地控制层以及集中控制层的几种配置方案,并进行了分析与比较.     

隔河岩水电厂泄洪闸集控系统改造

介绍了隔河岩电厂在泄洪闸集控系统的改造中,在现地单元电气控制回路采用可编程控器取代原有的继电器控制回路,实现了现地控制单元不需要人为干预,可以自动实现数据采集、现场总线网络的数据通讯以及闸门启闭的自动运行.上位机集中控制工作站实时监视、控制各泄洪闸门运行的工作状况,对整个泄洪闸门系统进行实时监视分析.     

株洲航电船闸监控系统功能及配置

船闸计算机监控系统应用于株洲航电枢纽工程，介绍了中央控制级与现地控制级系统构建情况。在现地控制级成功应用了长距离工业Interbus总线网络，系统的设计与设备选型兼具先进与成熟性，可供类似系统借鉴。     

S7-200PLC小型PLC集散控制的网络实现

针对分布式集中控制系统的要求,采用S7-200PLC来实现对现场控制级、集中控制级、系统信息处理级的控制,通过应用实例对分布集中控制系统硬件配置组成、通讯协议、通讯方式各个环节进行分析,从而实现工厂分布集中控制系统的解决方案。     

双台子河闸集散控制系统剖析

本计已建成运用的双台子河闸集散控制系统进行了剖析,指出了现行系统的模式及现存的其他几种配置方案及其优缺点。内容包括现行系统的设计原则、现地控制部分集中控制部分、现行系统的扩展及相关方面。     

三峡电厂暖通空调监控系统

1系统简介 长江三峡左岸电站厂房暖通空调控制系统是一个分层分布式实时监控系统,整个监控系统分为中央控制级(即暖通空调工作站,设在电厂中央控制室)和现地控制单元两级,实现对主要分布于▽67m～114m各不同高层、厂房上下游不同方位的暖通空调系统所有设备的控制、监测和通讯.     

高速公路智能控制柜升级系统设计

如何在高速公路照明系统中建立现地智能控制柜与主控室的信息交互？本文从实际应用角度出发,设计了利用GSM网络进行无线数据传输的网络架构,解决了高速公路照明系统的集中控制升级问题。     

Design and analysis of nonlinear digital controllers-based two-level hierarchy for electric utility industry

This paper suggests a control strategy of coordinating multiple dynamic-braking units during the transients ensuing major disturbances. The control strategy considered in this study is a two-level hierarchy. The proposed two-level structure results from the decomposition of the overall problem into parallel subproblems. This allows the retention of the closed-loop controls associated with each subsystem, which together constitute the lower level (Level I). The central coordinating controller forms the upper level (Level II). The coordination of the local controllers by the central controller accounts for nonlinear terms and interconnections and yields the global optimization of the overall system transient performance. The local controllers are not dependent on one another and are robust to any changes in the network configuration, due to the feedback or closed-loop control formulation inherent in the proposed strategy. To ensure physical realizability of the local controllers, the input was restricted to locally measurable signals. The methodology was implemented in a prototype software program, which was tested on a single machine connected to a very large network approximated by an infinite bus, and then on the IEEE four-generator test system. These studies considered fault-clearing times greater than the critical, assuring an unstable condition. The well-damped optimal state and control trajectories illustrate the successful solution of the problem, indicating that the technique is a valuable tool dealing with transient control problems for large-scale systems.     

3G技术在LED路灯照明智能监控系统中的应用

利用3G技术的网络覆盖广和传输速率快的特点,提出了一种基于3G无线通信技术的LED路灯照明智能化监控系统.系统主要包括智能控制终端模块、3G区域(路段)集中控制器和远程监控中心,智能控制终端模块通过电力载波通信与集中控制器组网,集中控制器通过3G无线通信网络与监控中心或便携式移动终端进行数据交换,实现对路灯的实时在线监控.该系统具有技术先进、结构简单、通信实时准确、控制范围广、系统容量大等优点,提高了路灯照明系统的智能化控制水平和应用范围,前景广阔.     

一种混合结构的无功补偿控制系统的设计

通过GPRS/CDMA无线网络对分布于各电力厂站的无功自动补偿装置进行集中控制,通过互联网对相关线路电压、无功、电流、功率因数等电网参数进行实时监测,并对自动补偿装置进行控制策略制定、历史数据维护。集中控制系统为减少电网无功损耗、改善供电质量提供有效保障。控制系统基于.NET平台进行开发,结合目前应用广泛的AJAX技术进行开发,兼容B/S和C/S架构。     

一种混合结构的无功补偿控制系统的设计

通过GPRS/CDMA无线网络对分布于各电力厂站的无功自动补偿装置进行集中控制,通过互联网对相关线路电压、无功、电流、功率因数等电网参数进行实时监测,并对自动补偿装置进行控制策略制定、历史数据维护.集中控制系统为减少电网无功损耗、改善供电质量提供有效保障.控制系统基于.NET平台进行开发,结合目前应用广泛的AJAX技术进行开发,兼容B/S和C/S架构.     

Integration of a hybrid fuel cell-battery system to a distribution grid

In order to integrate a proton exchange membrane type (PEM) fuel cell system (FCS) combined with a battery bank to a distribution grid; this paper proposes a local controller based on fuzzy logic. The proposed system provides primary frequency control and local bus voltage support to the local grid. This opposes the passive distributed generation of the present that do not provide auxiliary services, such as back-up power, voltage support and reliability of supply as they operate under constant power factor equal to 1 at all times. During network disturbances, the distributed generations of the present are disconnected until normal operation is reestablished. When the distributed generation penetration is high this may lead to system instability. The microgrid concept is the effective solution for the control and quality improvement of grids with high level of DG penetration. So, the proposed system, also, can be an active controllable microsource of a microgrid in the future that cooperates with other microsources in order to cover the local load demands for active and reactive power either under grid-connected mode or under islanding operating mode. In cases where the distribution grid (working as microgrid) is forced to operate in islanded mode, the hybrid system provides the demanded active and reactive power. The FCS is connected to a weak distribution grid so that the system performance is studied under the worst conditions. The simulation results are obtained using MATLAB software under a severe step load change where the grid is still connected and under islanded operation. In both cases the system presents a good performance.     

Distributed autonomous control system of the smart grid based on the turing pattern model

Renewable energy resources, which are generally unstable, affect the performance of electricity grids when they are fully connected. A distributed energy supply network system is expected to compensate for the anticipated performance problems. We have constructed a distributed autonomous system that controls batteries installed in each house. In this system, even if central control does not exist, electrical charging and discharging of the batteries are carried out for self‐organization. As a result, the grid stability is maintained in the local urban district. Our system is based on the Turing pattern model. © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

新型偏磁式消弧线圈及其控制

提出了一种新结构的偏磁式消弧线圈及其控制方法。它由1个三柱铁心和5个绕组组成。在铁心的两个边柱上分别设置了两级减小截面部分，这两个部分作为铁心磁化区，磁化作用主要发生在该区域。中柱上设有气隙，确定了消弧线圈的补偿下限。3个交流绕组分别布置在3个铁心柱上，两边柱绕组并联后同中柱绕组串联。2个励磁绕组所串联后布置在两边柱上交流绕组的内部。这种结构使得交流绕组对励磁绕组的影响减至最小，使磁化区易于磁化，调节范围加大，使有功损耗和磁化功率减小，实测结果表明，新型消弧线圈孤谐波含量小于4%，损耗小于1.7%，磁化功率小于1.3%。对它的控制问题可归结为两条控制特性：高压调节特性和低压调节特性，只需精确地提供控制电流就可以准确地调整消弧线圈电感。研究了它的励磁系统，该系统励磁电泫动态响应时间小于5ms，工作电流达到稳态时间小于40ms。     

可控制动电阻控制器广域协调优化方法研究

提出一种基于广域测量系统和三级共态预估算法的可控制动电阻控制器广域协调优化方法.将多机系统中的可控制动电阻控制器分成本地控制器和协调控制器两层,采用三级共态预估算法对分散的本地控制器进行非线性协调优化,使系统获得全局最优的控制效果.所提方法计算量小,并能在本地形成闭环反馈控制,适合于在线应用.仿真结果表明所提方法可以明显提高系统的暂态稳定性,并改善系统的动态品质.     

电厂电气监控系统组网模式及其与分散控制系统接入方式的研究

电厂电气监控系统(electrical control system,ECS)的发展高度依赖于通信组网技术,系统的实时性、可靠性、可维护性与ECS的组网模式及其与分散控制系统(distributed control system,DCS)的接入方式密切相关。文章介绍了ECS的一般组成,分析对比了间隔层与通信管理层之间的2种不同组网模式,即面向电气间隔的组网模式和面向过程的组网模式。并比较了ECS与DCS的常用接入方式,指出面向电气间隔的组网模式以及ECS与DCS混合连接运行模式比其他模式更具优势。