Tibco adds `glue? to soa structures [IT]

BusinessWorks 5.4 is Tibco?s implementation of an enterprise service bus (ESB), an important component in any SOA (service orientated architecture) implementation. As part of the SOA service-orchestration layer, sandwiched between the serviceenablement layer and the process-orchestration layer, the ESB has the job of routing communication between business services and processes     

Analysis of control system for electromechanical steering booster

The electromechanical steering booster (ESB) is analyzed as a control object and the requirements for its performance are formulated. Different structures based on the steering booster are synthesized. It is shown that the system with look-ahead compensation is preferable.     

ESB-2000i与SWT-2000F6的复用模式

阐述ESB－2000i数字载波机和SWT－2000F6的组成、功能、软硬件配置、运行方式,实现两个设备技术的灵活应用,满足现场需要。     

ESB500及YPC-500F6在电网联切中的应用

介绍ESB500及YPC-500F6复用技术和在重庆电网继电保护联切工程（安控工程）中的应用。     

SOA在电力信息化集成中的应用前景分析

介绍了面向服务架构SOA理念的源起、发展及特点,通过阐述SOA在电力行业的应用现状,以及SOA在国外电力行业的实践情况,提出电网企业基于SOA理念的企业级服务总线设想,为电网企业基于EMS与ERP两大应用的系统集成提出可行的解决方案。     

青海电力财务集约化建设成效及创新亮点

介绍了青海省电力公司在财务集约化过程中的创新做法以及取得的成效。用企业服务总线(ESB)统一系统集成平台,基于ERP实现检修运维标准作业成本管理,并实现实际成本的分摊分配,实现项目储备库的全口径管理、合同资金计划与ERP的集成应用等。对信息化和集约化管理中的相关课题进行了有益的探索。     

基于文件代理的EMS与外部系统接口

描述了基于服务总线的EMS体系架构,以及二次安全防护要求,并在此基础上,提出了基于文件代理的EMS服务总线与ESB接口方式.     

基于ESB的配电网自动化及管理系统信息集成

为实现配电网运行监控及管理的自动化、信息化,需要全面的信息集成。针对配电网自动化及管理系统的多源信息集成,分析了企业配电网管理相关系统间的信息交换方式,并对系统信息集成架构进行设计,提出了一种基于企业服务总线（ESB）的信息集成方案,符合IEC 61968标准提出的利用抽象中间件服务来支持企业配电网管理的多种分布式软件应用系统的应用间集成的思路,指出建立基于面向服务体系架构（SOA）的电力ESB是目前解决配电网自动化及管理系统信息集成问题的理想方案,这样既可以集成或继承已有的电力系统应用,也可以方便扩充新的业务系统功能,具有良好的动态可伸缩性。     

对ESB—500载波机运行的几点体会

介绍ＥＳＢ－５００载波机技术的性能和特点,重点阐述远方保护信号的传输和该机在调试中应注意的几个问题,同时也指出该机存在的缺陷。     

The Electrospouted Bed

Strong localized dc electric fields affect the solids recirculation of semi-insulating particles in a draft-tube-equipped spouted bed. Experimental evidence i$ provided in the form of pressure/flow and solids recirculation rate data versus voltage. The electrode structure is placed near the inlet spout, where strong electric fields tend to freeze the particles in the lower part of the annulus, reducing their rate of entrainment into the central gas stream. The electrospouted bed (ESB) increases the flexibility of spouting as a process applicable in chemical reacting, drying, and coating technologies.     

一体化企业级信息平台体系设计与应用

为了提升公司信息化水平,加强基础建设,统一用户管理,统一展现方式,实现数据共享,促进流程优化,本文结合公司信息化的需求,设计并实现了辽宁省电力有限公司一体化企业级信息平台体系。该体系采用Novell平台管理用户;采用Weblogic中间件技术实现工作流;采用ESB、PI等方式实现数据贯通,最终建成了以目录服务实现用户管理,以企业门户实现信息展示,以数据中心实现数据共享,以数据交换实现数据纵向交换,以应用集成实现数据横向集成的一体化企业级信息平台体系。该体系功能满足辽宁公司基础平台的基本要求,为公司业务应用和数据共享提供有力支撑。     

YTF（S）—500远方跳闸信号传输装置技术特点分析

ＹＴＦ（Ｓ）－５００型远方跳闸信号传输装置是在吸收西门子公司ＳＷＴ－５００Ｆ６远方保护信号音频传输装置及ＥＳＢ５００电力线复用载波机先进技术基础上，研制而成的新一代的远方跳闸装置。该装置与目前国内的远方跳闸信号传输装置不同，它能够同时传输两个相互独立系统的远方跳闸信号。该系统与复用保护系统的专用方式相比具有更高的安全性和可靠性。它采用了西门子公司专利技术：键控移频Ｆ６调制技术以及脉冲噪声抑制技术。使该装置的安全性和可靠性得到了极大保证。     

用Adaline网络实现电力线载波机的同频带全双工通信

分析了电力线载波机(PLC)的回波信号干扰问题,并指出了由此带来的电力线信道利用率低的问题。提出了一种利用Adaline网络(自适应线性神经网络)抵消回波信号的方法。利用神经网络强大的自适应能力、学习能力进行回波抵消,可使电力线载波机在同频带内实现全双工通信。由此即可提高信道利用率,因而此方法具有相当高的实用价值。结合ESB900系列数字式电力线载波机,探讨了在数字式电力线载波机上如何具体实现同频带内全双工通信,并利用M atlab对其可行性进行了仿真。     

基于SAPGRC＋SoTower的全面风险管理与内部控制系统

以国家电网公司全面风险管理与内部控制系统为例,介绍了基于SAPGRC＋SoTower的总体架构,以及NetWeaver与SoTower2个技术平台间的集成架构,以SAPGRC10．0的核心产品模块为基础,并结合业务流程管理（BPM）等组件,支撑系统自身功能的实现。利用企业服务总线（ESB）与外部系统进行集成,通过与企业门户、目录服务的集成,实现了用户在企业门户中对全面风险管理与内部控制系统的统一访问。     

The New National Control Centre, Ireland

The new National Control Centre for the Electricity Supply Board (ESB), Ireland, currently undergoing site commissioning, will be in operation in September 1986. The Control Centre will control a single 2200 MW island network. The control centre is being supplied under a supply contract with Landis & Gyr, Zug, Switzerland. There is a high degree of customer participation and emphasis is laid on customer interfacing. The central hardware comprises a dual main 32-bit computer system with Virtual Memory Operating System, four dual front-end processors and four display processors. Remote Terminal Units communicate with the Control Centre on a private communication network, mostly Microwave and Power Line Carrier. This paper describes the control centre in a general way with emphasis on contractual arrangements, customer involvement and testing procedures.     

基于SOA的企业信息集成平台的研究与实现

如何处理企业业务系统中的信息共享和业务集成,是企业在信息化建设过程中必须解决的关键性问题之一。为消除企业的“信息孤岛”问题,提高信息共享效率和水平,设计了一套基于SOA架构的企业信息集成平台的解决方案。该方案利用ESB与Web服务作为核心技术,采用集成适配器对数据格式、通信协议、应用程序进行包装,形成应用服务。通过服务的重用与编排组合来实现业务的集成,降低软件开发的成本。目前,该成果已实际应用于海南电网中,并取得了良好的应用效果。     

Determination of performance characteristics of a single-phase shaded pole induction motor by circuit-field method

A circuit-field combined method with reference to performance characteristics evaluation of a single-phase shaded pole induction motor is described. Features of material-structure construction of the motors are taken into account. The circuit-field equations with electromagnetic parameters and a procedure of solutions for sinusoidal approximation are determined. The circuit-field equations are solved for each value of slip in a double iteration process where non-linear potential equations are solved in the internal loop, and the linear complex circuit equations are solved in the external loop. Exemplary studies of the influence of magnetic shunts and the resistance of shading coils on performance characteristics of the motor are presented. The calculated performance characteristics of a tested motor are compared with measurements while taking into account magnetization characteristics.     

考虑频率特性的感应电动机负荷模型的对比研究

以往主要研究负荷的电压特性,很少研究频率特性。而在小电网或者薄弱电网频率可能有明显变化,所以需要研究电力负荷的频率特性。给出考虑频率特性的五阶电动机负荷模型和新三阶实用电动机负荷模型,提出两种负荷模型的参数辨识方法,通过蚁群算法辨识其中的重点参数。结合仿真算例,分别对比考虑和不考虑频率变化时的五阶电动机负荷模型、新三阶实用电动机负荷模型,还对比了两种负荷模型。根据新疆电网的实际扰动数据,对考虑频率特性的必要性进行了校验,结果表明,考虑频率特性所得参数辨识结果更精确、拟合效果更好,考虑频率特性时五阶电动机负荷模型效果更好。     

Modeling of Discharge Lamp Characteristics by Using Floating Memristor Circuit Emulator with Tunable Threshold

Abstract

A gas discharge lamp is a device, which operates as a light source by producing electrical discharge in ionized gaseous medium. Discharge lamps are commonly used in the market and according to their physical properties they can be mainly classified in three different categories: high pressure, low pressure and high-intensity lamps. Ionized gases have tendency to produce ongoing discharges and finally electrical arcs, which exhibit memristor characteristics proposed by Leon Chua. This paper introduces a novel fully floating memristor circuit emulator with tunable threshold characteristics which mimic discharge lamp characteristics. In order to investigate discharge lamp characteristics a test set-up is designed and commercially available discharge lamps are tested. The proposed memristor circuit displays distinctive characteristics in contrast to well-known smooth switching memristor characteristics in terms of hard switching capability. Proposed memristor has unique switching behavior and fully capable of modeling discharge lamps since it satisfies required zero-crossing, pinched hysteresis and frequency dependent characteristics of the discharge lamps. The comparisons of the current-voltage characteristics for both memristor and discharge lamps are supplied and investigated.     

A method for the nondestructive testing of contact switchgear based on measuring the recovering electric strength

Methods for measuring the recovering electric strength are considered. The switching characteristics of a device are compared to the recovering strength characteristics. It is shown that an objective switching capacity estimate can be obtained from the recovering strength characteristics. Nondestructive methods are proposed for certification purposes.