提高认识, 坚定信心, 为实现一流省电力公司的目标而奋斗——在2000年11月17日省公司加强管理争创一流工作会议上讲话(摘要)

加强管理,争创一流是电力企业永恒主题,是实现形势发展电力工业的要求,是站在新世纪起跑线上做出的正确选择。阐述了省公司加强管理创建一流的目标,分析了省公司创建一流所具备的必备条件,提出创一流应抓的几项工作,号召共同努力,敢于争先,勇创一流,在新世纪再创辉煌。     

浅谈500 kV 惠泉变无人值班运行管理规范

阐述了国家电网公司第一座500 kV无人值守变电站——500 kV惠泉变电站运行管理规范,包含对一、二次设备要求、监控后台界面要求、程序化操作模式要求、变电站的监控、测控五防与程序化操作的执行条件、程序化操作票的编写等内容,以期为今后500 kV无人值守变电站的运行管理提供参考。     

Predicting the energy-supply parameters for a transportation process based on multifactor models

Results are presented for the construction of a model of an energy-supply parameter characteristic for the transportation process, “electric-energy consumption for traction (plan),” based on the identification thereof with actual production and economic parameters by the example of one of the branches of JSC Russian Railways. The research was carried out based on a database created for monthly actual values over a long period, from 2007 to 2016. A methodology and results are presented for statistical studies of the parameter “electric-energy consumption for traction (plan)” in conjunction with 20 parameters, including “sectoral speed,” “average weight of the train,” “transportation costs.” The methodology involves choosing the factors for a multifactorial model and elimination of the consequences of multicollinearity based on the results of cluster analysis and constructed dendrograms. Variants are presented for the construction of multifactorial models to predict and manage the parameter of “electric-energy consumption for traction (plan)” for control and risk-management tasks. A variant of construction of a multifactorial model for predicting and control of the parameter “electric-energy consumption for traction (plan)” for control tasks and risk-management is given. As a mathematical tool for constructing the multifactorial models, a technique of linear regression equations has been used. The construction of dendrograms and obtaining the regression equation coefficients have been carried out using the Statistica software package. Using the multifactorial model results in improvement in the predictive accuracy of the “electric-energy consumption for traction (plan)” parameter measured with a MAPE estimate, from a 15% level to a level better than 6%.     

电网可视化无源滤波器优化设计软件开发

治理电网谐波时,怎样计算出无源滤波器的位置和参数成为其中的关键。目前的一些电力系统仿真计算软件或者只能在时域对单个谐波源进行频谱分析而不能进行谐波潮流的计算,或者只能进行谐波潮流计算而不能进行滤波器优化设计。我们基于Matlab和Delphi等开发平台,运用COM技术、面向对象等混合编程思想,开发出了1套电力系统谐波问题分析与治理的可视化操作软件包,为电网谐波问题分析与治理提供专门的整套解决方案。     

新型自然软开关变流技术研究

以拓展三相逆变器的自然软开关动作状态为出发点,提出了一种新型可升压自然软开关变流技术。由于采用该技术的新型三相逆变器电路结构简单,控制方便、可靠,因而能方便地作为电力有源滤波器的逆变器用于谐波补偿。在此,对一种新型逆变器拓扑和新型自然软开关变流技术特性进行了研究。通过对主电路的分析,推导出了新型AC/DC/AC变换器拓扑。采用空间电压矢量法,并结合所提出拓扑的特点,重点介绍了如何采用锯齿载波空间矢量脉宽调制法,以实现数字控制。最后通过仿真实验,验证了该控制技术的正确性和可行性。     

±1100kV特高压直流换流站过电压保护和绝缘配合

为合理确定±1 100 kV特高压直流换流站的绝缘水平,基于准东—成都±1 100 kV特高压直流输电工程,根据特高压换流站的绝缘配合方法,对准东换流站的绝缘配合进行了研究。根据特高压直流换流站避雷器布置基本原则,并结合现有±800 kV特高压直流换流站的绝缘配合经验,提出了±1 100 kV准东换流站的避雷器布置方案,详细分析了换流站交流侧、阀厅、直流母线和中性母线等不同区域的过电压保护策略,最后根据推荐的设备绝缘裕度确定了换流站设备的绝缘水平,直流侧1 100 kV直流极线的雷电冲击和操作冲击绝缘水平推荐为2 600 kV和2 150 kV;直流极线平波电抗器阀侧设备和高压端Y/Y换流变阀侧设备的绝缘水平建议取为一致,雷电冲击绝缘水平和操作冲击绝缘水平分别为2 500 kV和2 250 kV。研究结果对换流站设备的选型和制造具有重要指导意义,将为该特高压工程建设提供重要依据。     

建设资源节约型输电线路时所使用的导线

本文针对我国"十一五"期间为建设资源节约型输电线路的要求,对现有导线和近年来国内外出现的各种新型导线的性能,应用范围等作详细的评说,并提出对于主干线路用导线,应着重考虑节能、节约线路用地,在N-1时的精况下能安全运行;对于老旧线路改造用导线,应着重考虑线路改造后扩容时的弧垂特性。文中对我国输电线路用导线的生产、研制概况、规模给予介绍,提出研制新型导线的原则,指出创新是最重要的方法。     

磁场热处理对Fe-Cr-Co合金组织与性能的影响

本文系统研究了Fe-Cr-Co合金（2J85）在不同磁场强度下经过五种温度磁场处理后磁场强度和温度对合金微观组织和磁性能的影响，研究结果表明，磁场热处理温度为635℃时，在磁场热处理的各种磁场强度下合金均显示相对最佳磁性能，其中尤其以磁场强度为4000Oe时获得最高磁能积，即（BH）mx=6.63MGOe3,此外，本研究还显示，提高磁场热处理时的磁场强度，具有降低Fe-Cr-Co(2J85)合金对磁场热处理工艺敏感性的作用。     

地区电网调度自动化系统的标准化与规范化建设

阐述了地区网调度自动化系统的标准化、规范化建设的重要性,着重分析和讨论了建设中的关键问题：远动规约标准化、调度自动化系统软件标准化、SCADA／EMS系统质量检验标准化、调度管理信息系统规范化。并提出了地区电网调度自动化系统标准化、规范化建设的策略和发展方向。     

同塔多回路输电线路的设计

同塔多回路线路的最大优点是节约线路走廊 ,缺点是导线对地距离加大 (居民区 :d型塔 18m ,e型塔 15 .5m ,比规程规定的 14m大 ;非居民区 :d型塔 14 .5m ,e型塔 13.0m ,比规程规定的 11m大 ) ,线路的防雷性能变差 ,(经计算需采取加强绝缘 ,d型塔加耦合线等常规措施 ,才能使耐雷水平满足要求 ) ,相序换位困难 ,铁塔荷载大等。因此 ,它适用于经济发达、走廊困难、线路较短场合发展、使用。     

超超临界无旁脱硫脱硝机组新型DCS结构

江西景德镇电厂属国内首台投运的新建超超临界无烟气旁路挡板脱硫和脱硝机组。本工程成功采用了全新的DCS网络结构,对以往传统的脱硫、脱硝DCS网络结构和配置进行突破。在取消脱硫脱硝旁路的大环境下,这种新型的网络结构和配置将更适应工艺系统的安全性设置,其带来的系统的可靠性、稳定性和运行便利性将对今后同类型机组在无旁路脱硫脱硝下具有指导作用。     

Constraint programming for nurse scheduling

Nurse scheduling is a difficult, multifaceted problem. Here, the authors have presented the efficiency of Constraint Programming for solving this problem. The results obtained are very satisfactory for response time and for flexibility. The advantages of implementing this method are multiple: 1) it saves much time for the head nurse in the generation of schedules (the authors met head nurses for whom the task of scheduling takes a full working day); 2) the proposed system is not a rigid tool for schedule generation, but it is designed to help the decision maker in decisions and negotiations; 3) the proposed system is a flexible tool with respect to individual requests and for overcoming unforeseen absences; 4) it is very easy to manage constraints whether, for example, to define new constraints, activating or deactivating particular constraints, or modifying an already defined constraint. Ilog-Solver is a powerful tool for constraint programming. It provides the user with several types of variables, and the possibility of defining a specific constraint for the problem. The integration of object programming provided by Ilog-Solver allows better representation and saves much memory     

A 50-MW Thyristor Controlled Power Converter

In recent years, the use of thyristors for regulation of bulk power has grown appreciably. The Megaverter ? (Megawatt Power Converter) utilizes the thyristor for control and rectification to supply 52.5 MW of dc power for electrochemical use. The system consists of three Megaverters, each rated at 17.5 MW, connected in parallel. The thyristor assemblies are sized for worst-case short circuit surge, thereby providing maximum protection for critical components and eliminating costly downtime through nuisance tripping. Aluminum extrusion is used for the thyristor cabinet, allowing modular construction, reduction in size, and maximum design flexibility. Aluminum is also used for busbar and the thyristor water-cooled heatsink assemblies. The overall design approach results in simplified maintenance, reduced downtime, and simplicity of control for large thyristor controlled power converters.     

智能变电站嵌入式终端安全测试方法研究

智能变电站中,量测与控制业务用嵌入式终端的脆弱性是变电站受到网络安全威胁的重要原因.文章分析了智能变电站嵌入式终端的脆弱性和可能遭受的网络攻击,提出了智能变电站嵌入式终端安全测评指标及内容,同时针对各测评内容,研究了相应的安全测试技术.文章以国内某省电力公司智能变电站实验室为依托对五类嵌入式终端进行了安全测评,给出了测...     

A world movement of engineers for peace: proposal for an actionplan

In 1987, the Nuclear Age Peace Foundation offered a $50000 Peace Prize for the best proposal offering an action plan to provide sufficient incentives for science to be used for peaceful rather than destructive purposes. The winning proposal, submitted by the Hungarian Engineers for Peace, is reprinted here with minor changes. The authors propose that engineers and science professionals consider and elaborate their own standpoint and communicate their opinion, supported by scientific arguments and verification, to other citizens in their countries. They call for a world movement of engineers for peace. They provide an action plan and time schedule for a world congress of engineers for peace     

原电池的标志标识研究

介绍了新版国际标准IEC 60086-1及国家标准GB/T 8897.1对原电池标志的规定和要求,IEC 60086-5:2011原电池安全标准新增安全警示图形标志,欧盟电池指令2006/66/EC对电池标志标识的规定和要求,以及BIO Intelligence Service为欧盟委员会(European Commission)进行的关于原电池容量检测和标注的研究情况.     

火电厂SIS及其体系结构的分析

结合火电厂的生产管理过程及设备对象的特点,针对目前火电厂企业的信息系统存在问题及需求,借鉴国外火电厂一体化信息系统的发展经验,分析了火电厂厂级监控信息系统需求、SIS功能要求和SIS的体系结构,提出了理想SIS体系结构的观点和发展应用SIS系统的借鉴性意见.     

感应电动机直接转矩智能控制系统的Simulink仿真

首先介绍了感应电动机直接转矩控制基本原理。并在分析传统直接转矩控制缺点的基础上.提出了一种新的方法:在低速区,采用模糊神经网络控制;在高速区,采用磁链区间变更的方法对系统进行控制;最后,传统控制方案和新方案均通过Simulink仿真验证后,得出引入的方法可使整个系统的控制效果有明显的改善。     

Computation of power generation system production costs

This paper considers the problem of computing the expected value of generating system production costs. First, using a stochastic model for the frequency and duration of generation outage, it provides an efficient Monte Carlo procedure for the evaluation of the Baleriaux formula. Secondly, it points out the need for using a stochastic model for estimating production costs with time-dependent constraints via Monte Carlo. Lastly, it considers a model where the chronological load also has a random component and obtains an expression for expected production costs for this situation     

基于小样本集的网侧风电功率预测方法

风电功率预测多采用统计预测模型,为了达到可接受的预测精度,需要大量的历史数据对模型进行训练,不适用于缺少历史数据的新建风电场,为此提出基于小样本集的网侧风电功率预测方法。基于风电场少量的历史数据,运用支持向量机方法建立了网侧风电功率预测通用模型,并用此通用模型对风电场功率进行初步预测;在通用模型预测的基础上,利用区域内风电场的特征参数对这一网侧通用模型进行辨识和修正,从而得到区域电网网侧风电功率预测结果。实际算例验证了基于小样本集的预测方法的可行性,实际预测精度较好,说明该方法适于历史数据样本较小的风电场的功率预测,能够减少功率预测中统计预测方法对数据的依赖。