SSJ—100型水电厂计算机监控系统

介绍了ＳＳＪ－１００型计算机监控系统的硬件配置与应用软件，论述了系统的数据采集和处理、运行监视、事件处理、控制操作、技术管理与制表打印等功能。     

CENTUM—XL系统在员村电厂SCS系统中的应用

介绍员村电厂ＳＣＳ系统的特点,结合调试应用经验以及调试过程中出现的一些试验及解决办法,进一步阐述采用分散控制系统实现ＳＣＳ功能的优越性,对于ＳＣＳ系统尚采用或部分采用常规继电器控制的电厂摒弃旧有的硬线回路和不必要的冗余设计、将ＳＣＳ系统尽可能地纳入分散控制系统提供了可借鉴的先例。     

SCADA系统的自排错功能

当前ＳＣＡＤＡ系统已在工业控制各领域得到广泛应用,但是许多系统只是被用业进行监控,并无自动排错功能,本以一个实例介绍具有自动排错功能的ＳＣＡＤＡ系统的设计与实现。首先对系统进行建模分析,建立系统的Ｐｅｔｒｉ网络;然后介绍系统排错策略;最后介绍系统的具体实现。     

马鞍山第二电厂SCADA系统的设计和应用

介绍一个火电厂ＳＣＡＤＡ系统的设计和应用实例,在论述ＳＣＡＤＡ系统的结构和功能的基础上,着重论述了ＳＣＡＤＡ系统与电厂ＤＣＳ系统的连接以及自动发电控制（ＡＧＣ）帮电力模拟市场考核中应用,最后提出了大型火电厂ＳＣＡＤＡ系统设计和建设的几点体会和建议。     

计算机监控系统的应用和发展

ＳＣＡＤＡ系统是具有数据采集、监视、控制功能的计算机系统,经历了集中式监控系统、微型计算机监控系统、分层分散型监控系统的发展。该文介绍了一个分层分散型并带有网络的ＳＣＡＤＡ系统的结构和特点,给出了一个实例,指出中央级至少有一台调度计算机,在般有主计算机和若干台调度计算机,用网络或总线连接,达到资源共享。中央数据主通信器通过通信道与各ＲＴＵ或ＰＣ通信,实现计算机监控功能。又介绍ＳＣＡＤＡ系统在电力系     

西门子锅炉保护系统EHF的应用

论述了从西门子公司引进的ＤＣＳ系统Ｔｅｌｅｐｅｒｍ－ＭＥ／ＸＰ部分－ＡＳ２２０ＥＨＦ在控制对象,信号采集方式,系统配置和软件组态上的特点,基于该系统与其它保护系统的不同,详细描述了各功能组件和Ｉ／Ｏ模件的应用特点,并着重介绍了在ＡＳ２２０ＥＦ系统中完成的锅炉保护逻辑。     

多台马达复杂序列系统的最佳控制方式

介绍了ＳＩＭＯＣＯＤＥ在马达控制系统中的作用功能。利用ＳＩＭＯＣＯＤＥ完善马达控制方案简化电路,增强系统的可靠性和自动化汪洋。     

国产300MW机组的炉膛安全监控系统

文章阐述了国产３００ＭＷ机组炉膛安全监控系统的主要设计思想、系统的组成和基本控制功能，浅析了ＦＳＳＳ系统的运行方式、操作步骤及系统设计特点。     

上海市区供电局沪西供电所管理信息系统的绩效评价

上海市区供电局沪西供电所开发了集ＧＩＳ、ＭＩＳ和多媒体技术于一体的综合管理信息系统。该系统采用ＧＩＳ进行空间查询和辅助决策。ＧＩＳ与ＳＣＡＤＡ系统实时联网分析。文中介绍了系统的设计与功能并对该系统进行了成本效益分析。效益分析表明,该管理信息系统的开发不仅为社会带来巨大的经济效益,企业与用户也获得较大的经济效益。     

SCADA系统实时信息在MIS系统的应用

以ＳＣＡＤＡ系统面对的两个方向（量测对象和远程终端）为基础提出调度ＭＩＳ系统的开发方案,分析了调度ＭＩＳ系统的应用所需要的ＳＣＡＤＡ实时数据种类介绍了在数据共享的基础上开发的调度ＭＩＳ系统的功能,阐述了解决调度ＭＩＳ系统通用性的“构造系统”思想。     

Environmentally‐friendly Aspects and Innovative Lightweight Traction System Technologies of the Shinkansen High‐speed EMUs

In 1964, the Tokaido Shinkansen marked the start of the world's first commercial service high‐speed railway that operates at over 200 km/h. Since then, the Tokaido Shinkansen has demonstrated successful business and technological advancement. With the speeding‐up of the Shinkansen, environmental matters such as noise and vibration have become critical issues. Measures taken to counter noise and vibration—such as weight reduction and aerodynamics—also effect global environmental measures to reduce energy consumption and CO₂ emission. With the introduction of the Series 300, there was a system change of applying an AC drive system, and the lightweight body realized performance improvement over the earlier Series 0. The high‐speed EMUs have readily taken advantage of technological innovation such as those achieved in electronics technology. In particular, an innovative AC drive system comprising a power converter with a GTO thyristor and asynchronous motors realized a high‐performance and lightweight traction system for high‐speed EMUs in the 1990s. Furthermore, recent innovations in electronics technology, such as low switching loss power devices and high‐power permanent magnets, have improved the AC drive systems of the high‐speed EMUs of the 21st century. This article starts out by introducing environmentally friendliness of the Shinkansen trains in terms of low energy consumption by means of traction system change, and then proceeds to describe the recent technological innovations that have given birth to lightweight traction systems, such as the Permanent Magnet Synchronous traction Motor (PMSM) and power converters with train‐draft‐cooling systems. The article concludes by summing up the environmentally friendly aspects of the Tokaido Shinkansen. Copyright © 2008 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

苏联K-500-240-2型超临界机组的热力系统

扼要介绍了目前国内外500MW 级及以上容量机组热力系统设计中具有代表性的K-500-240-2机组热系统设计概貌.包括:机、炉参数.给水予热系统、除氧、抽真空、除盐、给水泵组、主要汽水管道、热网加热系统及机组的起动系统等.     

Four-switch Three-phase Inverter Performance Fed Sensorless Speed Control Induction Motor Drives Using Model Reference Adaptive System

Abstract—This article presents an investigation of four-switch inverter performance fed three-phase induction motor drives. Speed estimation is based on fundamental wave models using a model reference adaptive system as a speed estimator technique. The motor is fed from a four-switch three-phase inverter. A comparative study for sensorless speed estimation using a four-switch three-phase inverter, and a six-switch inverter is simulated and experimentally investigated at different operating conditions. Also, a comparison of system performance based on the four-switch inverter and conventional six-switch inverter in terms of speed response and total harmonic distortion of stator currents is presented. Experimental and simulation results at different points of operation are presented, verifying the robustness of sensorless speed estimation at different load levels. Sensorless speed estimation based on the four-switch three-phase inverter is quite acceptable considering its speed response.     

基于PI控制方法的SVC电压负反馈控制策略

简要分析了动态无功补偿器的控制原理。通过电压互感器检测电网和SVC输出电压,经运算电路按给定算法计算所需的控制信号传输至SVC电压PI调节单元,以获取控制器中采用负反馈的PI控制调节等效电纳,该方法控制灵活、适应性强。MATLAB仿真实验建模表明该方法可以提高动态无功补偿设备调节电压的速度,加速系统电压稳定过程。     

基于自抗扰控制的PMSM转速调节系统

经典PI调节的永磁同步电动机转速控制,存在快速性与超调量之间的矛盾.将自抗扰控制技术应用于永磁同步电动机转速控制中,设计跟踪微分器对输入安排过渡过程,使系统有良好的转速适应性;扩张状态观测器通过对综合扰动项的观测和实时补偿,增强了系统的鲁棒性.仿真实验结果表明,基于ADRC的PMSM转速调节系统,可实现对输入信号的快速无超调跟踪.     

单片机控制的步进电机升降频规律及实现

在综合分析了步进电机矩频特性、具体负载的情况下,得出了步进电机升降频规律,并讨论了升降频曲线的计算方法。文中还给出了单片机控制步进电机系统中自动升降频的具体实现方法和程序框图,并介绍了此方法的实际应用。     

调速器附加控制对孤立电网频率稳定的作用

单纯的频率反馈控制无法及时进行功率平衡,易使系统频率发生较大偏移和振荡;功频电液调速器虽然能够对功率进行控制,但对一次调频却有反作用。针对上述问题介绍了调速附加控制,将功率偏差作为反馈量,设计了包括比例式、最优PID式、模糊式3种附加控制器,通过孤立电网的仿真验证了这3种调速附加控制在孤网中的效果。     

GPS舰船定姿系统的研究

简述了利用GPS载波相位技术进行舰船定姿的原理,分析了舰船定姿的关键技术--整周模糊度求解的算法.采用2块Thales AC12具有载波相位原始数据输出的低成本接收板以及天线构成了实验的硬件装置,并完成了系统定姿解算的软件设计.通过对数据的处理与定姿算法的解算,获取载体的二维姿态角--航向角和俯仰角,并对解算结果的精度...     

Midterm stability analysis of a multimachine system by the frequency response method

The eigenvalue method, Routh—Hurwitz method and other conventional methods used for steady-state stability analysis are not suited for a multimachine system consisting of several hundred machines with automatic voltage regulators and speed governors. This paper shows that the frequency response method is very useful for such a large-scale system. The critical stability condition obtained by the proposed method is compared with that obtained by conventional simulation and it is shown that the proposed method is sufficiently accurate and efficient. This algorithm is applicable to a decomposing system.     

模糊PID控制在SVC中的应用分析

分析静止无功补偿器(Static Var Compensator,SVC)的补偿及控制原理,将模糊控制引入到SVC的PID控制系统,使之既具有模糊控制灵活、适应性强、快速性好的优点,又具有PID控制精度高的特点.仿真建模实验表明模糊PID控制方法在SVC的应用中可以明显加快调节电压的速度,加速系统电压稳定过程.