发电集团公司生产实时信息系统方案研究

本文基于XTSIS系统,结合发电集团公司对生产实时信息的管理需求,以电厂和机组为基础,提出了利用网络技术和计算机软件技术在发电集团总部与所属电厂之间建立有效信息通道的解决方案,并对系统的安全性进行探讨,提出了系统安全措施。     

发电集团公司生产实时信息系统方案研究

本文基于XTSIS系统,结合发电集团公司对生产实时信息的管理需求,以电厂和机组为基础,提出了利用网络技术和计算机软件技术在发电集团总部与所属电厂之间建立有效信息通道的解决方案,并对系统的安全性进行探讨,提出了系统安全措施.     

发电集团公司生产实时信息系统方案研究

本文基于XTSIS系统，结合发电集团公司对生产实时信息的管理需求，以电厂和机组为基础，提出了利用网络技术和计算机软件技术在发电集团总部与所属电厂之间建立有效信息通道的解决方案，并对系统的安全性进行探讨，提出了系统安全措施。     

厂级MIS在发电生产管理信息系统的应用

以吉林省电力公司及下属各电厂为对象,设计开发了发电生产管理信息网络系统。该系统实现了数据的远程传输,并可实时异地监测电厂的运行状况。介绍了该系统的设计思想,总体结构,功能,主要特点和实现方法。实际应用证明该系统可极大地提高生产及管理部门的工作效率,有很高的推广价值。     

区域(省级)发电公司生产实时监管系统的研发

根据区域发电公司生产管理特点,研发了1套完整的生产实时监管系统。该系统集成了生产数据的实时采集、计算分析和实用功能模块,实现了区域发电公司各部门、各电厂之间生产数据的传输和共享,使相关人员可迅速、及时、全面、详细、准确地得到区域发电公司的各发电厂生产运行情况,提高区域发电公司的技术管理水平。     

面向电网安全稳定的发电设备远程监测与诊断平台

将发电企业的设备运行信息实时传输到电力科学研究单位的技术中心,可以及时组织专家力量开展发电设备的远程监测和诊断分析。提出了集团级发电设备远程监测与诊断平台建设的总体技术方案,系统功能包括数据集成、在线监测及诊断分析3个层次,通过加密和压缩实现了远程海量数据的传输,基于SOA标准搭建了分层构件化及应用模块化的系统架构,采用统一信息建模技术和数据适配接口解决了异构大数据的利用,并通过基于设备工作机理的软测量及诊断技术,以及实时数据智能挖掘技术等,实现了锅炉、汽轮机、发电机等设备的远程监测与诊断。示范工程应用表明：提出的总体技术方案和系统架构正确合理,有助于提高发电设备运行的安全性和稳定性。     

提高电力调度中心和省级集控中心数据可靠性研究

发电集团要实现电力生产过程集中控制、集中调度、集中管理的技术基础，是要实现将不同区域、不同发电形式的电厂实时产生的海量生产数据同步采集、传输、汇总至集控中心及集团级生产调度中心以供监视、控制、筛选、归类、统计、分析及应用。现今通信技术快速发展，基本能满足生产数据实时性传输的要求，但在数据应用可靠性、稳定性、有效性和安全性方面仍有提高空间，本文结合电力行业发电集团在建设集团级生产调度中心和省级（区域）级集控中心过程中发现的数据质量问题进行总结，分析问题原因，并提出相应解决方案。以量化的方式细分影响数据可靠性的因子，对方案中可落实的措施进行了总结及效果评估。     

生产实时监管系统的设计与实现

根据发电企业生产管理特点,设计了一套完整的生产实时监管系统。系统集成了生产过程实时监控、运行重要事件自动监视和报警、性能计算与经济分析、重要指标在线对比分析、综合报表等功能模块,实现发电企业各部门、电厂之间生产数据的传输和共享。使相关人员可以快速、准确地掌握各电厂生产运行状况,提高发电企业的信息化水平和管理水平。     

面向公司级的电厂运行信息系统的研究开发

对发电集团/公司层面上的电厂运行信息系统进行了研究开发,对实现该系统的技术方案、技术特点、系统功能和工程应用等方面进行了研究介绍.公司级电厂运行信息系统应具备主要运行参数的监管、主要性能参数的计算、主要参数的耗差分析、远程专家系统、技术资料数据库的支持等功能,同时该系统在电厂的接纳和功能的扩展上是完全开放的,在此基础上可以实现集团内数据平台的统一规划和远程技术服务体系的建设.     

东江水电厂水调数据实时传输系统的实现

基于电力系统实时数据通信应用层协议提出了水调数据远程实时传输应用层协议，并基于此协议实现了基于星形网络结构的东江水电厂水调数据实时传输系统。在系统的开发中充分考虑了系统的稳定性和可靠性要求，实现了水调实时数据的自动传输和水调历史数据的自动补传。近4年的实际运行结果表明，该系统的设计是科学、合理的，运行效果令人满意。     

Quantum Transport Simulation of Carrier Capture and Transport within Tunnel Injection Lasers

Hot electron distributions within the active region of quantum well lasers lead to gain suppression, reduced quantum efficiency, and increased diffusion capacitance, greater low-frequency roll-off and high-frequency chirp. Recently, tunnel injection lasers have been developed to minimize electron heating within the active quantum well region by direct injection of cool electrons from the separate confinement region into the lasing subband(s) through a tunneling barrier. Tunnel injection lasers, however, also present a rich physics of transport and scattering, and a correspondingly rich set of challenges to simulation and device optimization. For example, a Golden-Rule-based analysis of the carrier injection into the active region of the ideal tunnel injection laser would suggest approximately uniform injection of electrons among the nominally degenerate ground quantum well states from the separate confinement region states. However, such an analysis ignores (via a random-phase approximation among the final states) the basic real-space transport requirement that injected carriers still must pass through the wells sequentially, coherently or otherwise, with an associated attenuation of the injected current into each subsequent well due to electron-hole recombination in the prior well. Transport among the wells then can be either thermionic, or, of theoretically increasing importance for low temperature carriers, via tunneling. Coherent resonant tunneling between wells, however, is sensitive to the potential drops between wells that split the energies of the lasing subbands and (further) localizes the electron states to individual wells. In this work such transport issues are elucidated using Schrödinger Equation Monte Carlo (SEMC) based quantum transport simulation.     

密相挤压输送——先进的煤粉的管道输送技术

本文介绍了密相挤压输送技术的原理和优点,并通过对试验数据的归纳分析,得出了一组密相挤压输送的性能曲线和计算输送管道阻力损失的公式。     

钢卷运输系统改造实践

钢卷运输系统主要功能是将成品钢卷运送到待发货区域,在板带生产线中广泛应用.介绍莱钢1500 mm宽带钢卷运输系统步进梁和运输链位置检测方法的改进和控制模式的改变,在设备改造实践和功能实现过程中解决了检测控制不稳定问题和运输链电机过流跳电故障.系统改造使用后,步进梁步距控制可靠,运输链准确定位,实现了钢卷运输系统全区域自动控制,取得了良好效果.     

输灰系统的优化布置

三河发电有限责任公司一期工程输灰系统设计有4台输灰空压机运行,从实际运行表明,空压机的设计余量过大,一半时间处于空载运行。通过分析,提出了其优化运行的设想一期工程的2台机组共用2台输灰空压机,其他2台输灰空压机供二期2台30万kW供热机组输灰系统使用,这不但节省二期工程建设初投资费用,而且优化了系统布置,大大减少因系统复杂而存在的安全隐患,既降低了能耗,又节省了检修维护费用。     

Wigner Paths for Quantum Transport

A Monte Carlo algorithm based on the concept of Wigner paths has been developed to study quantum transport in mesoscopic systems in strict analogy with the traditional Monte Carlo simulation used to solve the Boltzmann transport equation. Scatterings with both phonons and impurities can be accounted for. As regards a structure potential profile the effect of the corresponding classical force can be inserted in the dynamics of the free flight, while quantum effects due to rapid potential variations are included as a special scattering mechanism.     

Physicochemical and Transport Properties of Bicuvox-Based Ceramics

Polycrystalline Bi_2-xLa_xV_0.90Cu_0.10O_5.5- (x = 0, 0.10 and 0.20) and Bi_1.90Pr_0.10V_0.90Cu_0.10O_5.5- were prepared by the standard ceramic synthesis technique. Electrical conductivity of the Bi_1.90La_0.10V_0.90Cu_0.10O_5.5- solid solution at temperatures above 500 K is lower in comparison with undoped BICUVOX.10, whereas transport properties of these materials at 370–450 K are close to each other. Doping Bi₂V_0.90Cu_0.10O_5.5- with praseodymium was found to result in segregating secondary phases and decreasing conductivity and thermal expansion of the ceramics. Oxygen ion transference numbers of the oxides with moderate rare-earth dopant content (x 0.10) vary in the range of 0.90–0.99 at 780–910 K, decreasing with increasing temperature. Thermal expansion coefficients of Bi_2-xLn_xV_0.90Cu_0.10O_5.5- ceramics were calculated from the dilatometric data to be (16.1–18.0) × 10^-6K^-1 at 730–1050 K.     

民用运输机场绿色照明设计

阐述了绿色照明的基本概念。对民用运输机场中的绿色照明设计进行了探讨,包括选择合理的照度标准。利用太阳能及LED节能光源,采用智能照明控制系统等措施。使机场照明用电真正达到绿色、节能目标。     

Physicochemical and Transport Properties of Bicuvox-Based Ceramics

Polycrystalline Bi_2-xLa_xV_0.90Cu_0.10O_5.5-α (x = 0, 0.10 and 0.20) and Bi_1.90Pr_0.10V_0.90Cu_0.10O_5.5-α were prepared by the standard ceramic synthesis technique. Electrical conductivity of the Bi_1.90La_0.10V_0.90Cu_0.10O_5.5-α solid solution at temperatures above 500 K is lower in comparison with undoped BICUVOX.10, whereas transport properties of these materials at 370–450 K are close to each other. Doping Bi₂V_0.90Cu_0.10O_5.5-α with praseodymium was found to result in segregating secondary phases and decreasing conductivity and thermal expansion of the ceramics. Oxygen ion transference numbers of the oxides with moderate rare-earth dopant content (x ≤ 0.10) vary in the range of 0.90–0.99 at 780–910 K, decreasing with increasing temperature. Thermal expansion coefficients of Bi_2-xLn_xV_0.90Cu_0.10O_5.5-α ceramics were calculated from the dilatometric data to be (16.1–18.0) × 10^-6K^-1 at 730–1050 K.     

Three-Dimensional Quantum Transport Simulation of Ultra-Small FinFETs

Three-dimensional simulation based on a non-equilibrium Green’s function method including electron-phonon interaction and Si/SiO₂ interface roughness has been performed for ultra-small FinFETs. Comparing the simulated drain-current–gate-voltage characteristics with those obtained in the ballistic limit, effects of the scatterings on the device characteristics are discussed. Threshold voltage fluctuation is also discussed.