基于Profibus现场总线技术的楼宇设备监控系统

介绍了现场总线技术及其在楼宇自控系统中的应用,分析了Profibus现场总线的技术特点.开发了基于Profibus现场总线技术的楼宇设备监控系统,并介绍了系统的网络结构和功能特点.该系统实现了对楼宇设备的监测与控制要求,取得了良好的运行效果.     

厂用电监控系统的设计与应用

介绍了厂用电监控系统的构成模式，利用微机保护测控装置、现场总线技术、计算机网络监控技术实现对设备的控制、监视、保护和通信，简述厂用电监控系统（ECS）的主要功能，归纳了其控制特点，并总结了计算机网络监控技术、微机保护测控装置、现场总线技术的优势。     

基于Profibus的无人值守水电站监控系统

介绍了国内外水电站监控系统的发展情况和一种基于Profibus现场总线技术的无人值守监控系统。该系统以控制理念、拓扑结构、控制手段和硬件设备保证了系统的安全、可靠,实现了无人值守,为水电站节省了大量的人力资源。     

基于DeviceNet的电动机控制中心智能监控系统设计

本文基于DeviceNet现场总线技术,将硬件、软件和网络技术紧密地联系在一起,设计了电动机控制中心智能监控系统,通过现场总线实现电动机控制中心与基础自动化系统之间方便的联系,为工业现场提供了一整套专业化电动机控制中心智能监控管理方案。     

现场总线技术在厂用电监控系统中的应用

以工程实例,介绍现场总线的技术特点与传统DCS系统的不同,论述基于现场总线技术的厂用电监控系统在发电厂中的应用,总结其部分技术特点和需要解决的问题.     

一种基于现场总线的分散控制系统的研制

采用现场总线技术,开发了一套分散控制系统,该系统在控制级采用了双CAN现场总线网结构,并采用多种新的软、硬件技术,既可以直接与多种现场总线设备连接,又可以用于系统改造接入传统设备。系统具有良好的兼容性和开放性,并且采用了ODBC技术和互联网站服务技术,可以实现远程监控。测试结果和现场应用表明该系统工作可靠,具有良好的控制品质。     

基于现场总线的油库监控系统研发

面对油库传统设备多的现实,在我国油库自动化水平亟待提高的背景下,应用基于现场总线的Sie-mens自动化技术构建了油库监控系统。介绍了PROFIBUS现场总线与AS i总线的特点、长处以及它们在整个SCADA系统中所处的不同位置和所起的不同作用,从而两者集成而构建的监控系统不仅使得通信、控制更趋流畅、有效,而且使得对现场安全情况的监视更加可靠,另一方面,本监控系统适合我国油库设备现状,并且已成功应用于油库。     

基于Web技术和LonWorks总线的建筑节能监控系统

介绍了基于Web技术和LonWorks现场总线技术构建建筑节能监控系统的基本原理和实现,并给出了系统应用实例。可以通过Internet实现对LonWorks现场总线设备的远程监控,提高了控制网络的灵活性和便捷性,为建筑节能远程监控提供了支持。     

基于CAN总线的分布式嵌入式远程监控系统开发

本文介绍了利用CAN总线接口与现场控制模块连接、以嵌入式系统为核心的远程监控系统。本系统上层通过Web服务器连入Internet，允许授权用户在Internet任意一点应用浏览器访问该系统，实现对下层设备群的监控。该系统在工厂底层设备网络、楼宇自动化等远程监控场合有着广泛应用的前景。     

现场总线设备监控管理系统应用

为了充分利用现场总线智能设备的状态诊断数据,对设备状态进行监视和诊断,研发了基于数据挖掘技术的现场总线设备监控管理系统,其通过以太网的OPC通信协议接收来自DCS、现场总线控制系统(FCS)、PLC系统的现场总线设备状态诊断数据,并对其进行分析和处理,且不局限于某控制系统,实现了对现场总线设备的统一监控管理和预测性维护。     

现场总线技术在电厂电气控制系统中的应用

对电气现场总线控制系统（FCS）的发展现状、监控范围及特点进行了简要论述，详细说明了电气FCS的配置方案和优缺点。通过综合论证比较认为。将FCS应用到火力发电厂电气控制系统中，可以提高电厂电气系统的自动化水平。节约工程投资，值得推广应用。     

Observer-based nonlinear control of power system using sliding mode control strategy

This paper presents a new transient stabilization with voltage regulation analysis approach of a synchronous power generator driven by steam turbine and connected to an infinite bus. The aim is to obtain high performance for the terminal voltage and the rotor speed simultaneously under a large sudden fault and a wide range of operating conditions. The methodology adopted is based on sliding mode control technique. First, a nonlinear sliding mode observer for the synchronous machine damper currents is constructed. Second, the stabilizing feedback laws for the complete ninth order model of a power system, which takes into account the stator dynamics as well as the damper effects, are developed. They are shown to be asymptotically stable in the context of Lyapunov theory. Simulation results, for a single-Machine-Infinite-Bus (SMIB) power system, are given to demonstrate the effectiveness of the proposed combined observer-controller for the transient stabilization and voltage regulation.     

现场总线Control Net在火电站辅助控制系统中的应用

介绍了现场总线ControlNet的特点和应用,结合火电站辅助控制系统的特点,阐述了ControlNet的具体应用成果,比较了ControlNet和工业以太网这两种现场总线的特点,分析了它们在火电站辅助网络系统中的应用.     

Reaching phase free adaptive fuzzy synergetic power system stabilizer

In this paper, an adaptive fuzzy power system stabilizer is developed based on robust synergetic control theory and terminal attractor techniques. The main contribution consists in making the dynamic system insensitive to parameters variation. This aim is achieved using a new synergetic controller design such that power system states start, evolve and remain on a designer chosen attractor toward the equilibrium point therefore avoiding transient mode. Rendering the design more robust, fuzzy logic systems are used to approximate the unknown power system dynamic functions without calling upon usual model linearization and simplifications. Based on an indirect adaptive scheme and Lyapunov theory, adaptation laws are developed to make the controller handle parameters variations due to the different operating conditions occurring on the power system and to guarantee stability. The performance of the proposed stabilizer is evaluated for a single machine infinite bus system and for a multi machine power system under different type of disturbances. Simulation results show the effectiveness and robustness of the proposed stabilizer in damping power system oscillations under various disturbances and better overall performance than classical PSS and some other types of power stabilizers.     

Swarm intelligence based algorithms for reactive power planning with Flexible AC transmission system devices

In the proposed work, authors have applied swarm intelligence based algorithms for the effective Co-ordination of Flexible AC transmission system (FACTS) devices with other existing Var sources present in the network. IEEE 30 and IEEE 57 bus systems are taken as standard test systems. SPSO (Simple Particle Swarm Optimization) and other two swarm based intelligence approaches like APSO (Adaptive Particle Swarm Optimization) and EPSO (Evolutionary Particle Swarm Optimization) are used for the optimal setting of the Var sources and FACTS devices. The result obtained with the proposed approach is compared with the result found by the conventional RPP (Reactive power planning) approach where shunt capacitors, transformer tap setting arrangements and reactive generations of generators are used as planning variables. It is observed that reactive power planning with FACTS devices yields much better result in terms of reducing active power loss and total operating cost of the system even considering the investment costs of FACTS devices.     

Expert system for voltage control in restoration of EHV power system following complete blackout

This paper considers voltage control in restoration of EHV power systems. Restoration of a power system is performed by energizing transmission lines sequentially from initial power sources. These operations have already been programmed into an expert system developed by the authors. However, energizing no-load transmission lines causes some bus voltages to rise 20 percent more than rated voltages, and transformers can tolerate a 20 percent voltage rise only for 1 min. Here, the expert system is supplemented with a function for checking bus voltages and reactive powers of initial sources, and which automatically switches on reactors. Conditions for switching reactors and selecting appropriate reactors are written by rules, hence they are easy to modify. The target of voltage control is to keep bus voltages with in ±5 percent, and to keep reactive powers of generators within 30 percent of generator capacity. Applying this method to three basic restoration patterns of a model power system shows that small adjustment of switching conditions is sufficient for two patterns, and some modification of the restoration procedure is necessary for the other pattern to obtain good voltage profiles through the restoration process.     

基于SLC500PLC的火电厂空调监控系统设计

将SLC500系列PLC应用于火电厂空调监控系统,采用ControlNet现场总线,实现了集中控制,控制策略上提出了一种模糊PID算法,成功应用于某火电厂,结果证明了对于多输入、多输出的非线性、时变、强耦合、大滞后的复杂控制系统非常有效。     

地区电网广域备自投控制系统研制

针对现行的常规备自投控制策略的不足,开发了基于EMS中高级应用软件系统的广域备自投控制决策方法,对全网所有变电站备自投的负荷联切定值进行实时整定计算.新研制的厂站端备自投装置接收来自远方主站端调度中心的控制定值,根据动作条件和控制定值自动切除相应的负荷馈线.并且通过软/硬压板灵活实现新型的"远方"和传统的"就地"备自投...     

FACTS对电力系统静态安全性影响评价指标体系研究

针对目前评价灵活交流输电系统（FACTS）系统稳态性能影响指标的不足,结合FACTS设备自身控制潮流和电压的工作特性,提出了一套全面评估FACTS设备对系统静态安全性影响的指标体系。建立了基于运行状况的晶闸管控制串联电容器（TCSC）、静止无功补偿器（SVC）、统一潮流控制器（UPFC）可靠性模型,并基于该模型提出了FACTS设备的控制策略,该策略以状态量越限值最小为控制目标。建立了采用蒙特卡罗仿真的概率评估算法。通过IEEE-57节点的计算验证了所提指标体系和算法的有效性。     

Linux在实现电力自动化中心无人值班系统中的应用

Linux是个源代码公开的类UNIX操作系统，它拥有丰富的软、硬件支持。基于Linux的电力自动化系统安全性好、性能高、稳定可靠、硬件选择范围广。Linux在电力自动化系统中有着广阔的应用前景。文章对SCADA系统及在电力自动化无人值班系统中数据采集服务器采用Linux时的配置以及Linux服务器如何实现与客户端其他OS的互访等作了介绍。