电厂及变电站电气设备安装及检修的思考

现如今,电厂及变电站的工作压力越来越重,保障电厂及变电站的整体运行成效,必须保障电气设备安装及检修工作高效展开.鉴于此,本文针对电厂及变电站电气设备安装和检修工作展开了一系列探讨.首先明确了电厂及变电站电气设备安装与检修常用技术,分析了电厂及变电电气设备安装和检修工作的展开价值,然后分析了电厂和变电站电气设备安装经验总结,反思了电厂及变电站电气设备检修管理工作存在的不足,最后分析了如何做好电厂及变电站电气设备的检修工作.     

关于变电站直流系统故障原因分析及对策

变电站直流系统的稳定运行是变电站安全工作的重中之重,直流电源作为变电站的重要组成部分,为一些重要常规负荷、继电保护及自动装置、远动通讯装置提供不间断电源,直流系统安全运行,直接关系到变电站能否安全运行。本文从变电站直流系统出发,全面分析变电站直流系统故障原因及危害,着重对各故障应采取的对策进行了深刻剖析和总结,希望在今后的变电站运行过程中,能够为实现可靠运行和安全运行提供帮助。     

关于变电站电气设备在线监测的分析

变电站是电力系统的重要组成部分,变电站的可靠性及运行状况直接决定整个系统的稳定和安全,因此必须时常检修变电站的电气设备保证变电站的正常运行,本文论述了变电站电气设备在线监测系统的重要性和优点,分析了现代变电站电气设备的在线监测的现状,介绍了变电站的电气设备在线监测的方法,并对在线监测技术的发展方向上进行了展望。     

变电站综合自动化系统通信功能的研究

现代计算机技术和通信技术在变电站中的应用越来越广泛,使得变电站向着现代化的方向发展。随着智能电子装置的飞速发展,为了实现变电站综合自动化技术的全数字化监控,本文对变电站的通信模式做了简要的介绍。以及变电站综合自动化及设计原则和要求,做了简单的分析与研究。     

智能化变电站技术简析

目前,智能化变电站技术发展迅速,很多地区都在开展建设,并取得了一些成果和经验。智能化变电站已成为电网行业的发展趋势,了解和掌握智能化变电站相关知识及其原理已经迫在眉睫。文章陈述了智能化变电站的技术要求及其发展近况,并与传统常规变电站进行对比,分析了智能化变电站中自动化系统的原理结构及智能电气一次设备的技术原理等,使读者对智能化变电站技术有初步的认识和理解。     

浅谈地下变电站的运行与管理

为了适应经济发展规划、满足城市景观的需要,越来越多的地下变电站投入运行。然而由于其结构及设备的特殊性,地下变电站存在着许多安全风险,对变电运行部门提出了新的要求。本文介绍了近年来国内外地下变电站的建设情况,分析了地下变电站的特点及其运行风险,结合中轴站的运行管理经验,提出了地下变电站在辅助系统及人员培训方面的对策和建议。为地下变电站的运行管理积累了经验。     

浅析变电站综合自动化系统

在此简要介绍了变电站综合自动化系统的重要性和发展趋势,提出了变电站综合自动化基本概念,并对系统结构、通讯方式和能实现的基本功能及变电站自动化的发展前景进行分析。     

智能化变电站技术简析

目前,智能化变电站技术发展迅速,很多地区都在开展建设,并取得了一些成果和经验。智能化变电站已成为电网行业的发展趋势,了解和掌握智能化变电站相关知识及其原理已经迫在眉睫。文章陈述了智能化变电站的技术要求及其发展近况,并与传统常规变电站进行对比,分析了智能化变电站中自动化系统的原理结构及智能电气一次设备的技术原理等,使读者对智能化变电站技术有初步的认识和理解。     

变电站扩大内桥主接线的二次回路分析

为使变电站达到可靠性、功能性和经济性要求,人们常采用内桥接线作为电网终端变电站项目的电气主接线。对此,要求技术人员在变电站的设计过程中,充分考虑终端变电站的特点,认真分析电气二次电流回路、电压回路和备自投逻辑回路的特点,使其满足变电站的运行维护及扩建要求。     

谈变电站综合自动化系统

文章简要介绍了变电站综合自动化系统的重要性和发展趋势,提出了变电站综合自动化基本概念,并对系统结构、通信方式和能实现的基本功能及变电站自动化的发展前景进行分析。     

Power of Tests for Unit Roots in the Presence of a Linear Trend*

Dickey and Fuller [Econometrica (1981) Vol. 49, pp. 1057–1072] suggested unit‐root tests for an autoregressive model with a linear trend conditional on an initial observation. TPower of tests for unit roots in the presence of a linear trendightly different model with a random initial value in which nuisance parameters can easily be eliminated by an invariant reduction of the model. We show that invariance arguments can also be used when comparing power within a conditional model. In the context of the conditional model, the Dickey–Fuller test is shown to be more stringent than a number of unit‐root tests motivated by models with random initial value. The power of the Dickey–Fuller test can be improved by making assumptions to the initial value. The practitioner therefore has to trade‐off robustness and power, as assumptions about initial values are hard to test, but can give more power.     

电力市场统一协调联合优化出清模型研究

为实现我国电力资源大范围优化配置,打破省间电力市场交易壁垒,强调电力商品的经济性.文章在借鉴欧洲区域价格耦合项目(Price Coupling of Regions,PCR)成功经验的基础上,试图建立适用于我国省间电力统一市场的联合优化出清模型.文章旨在为建立适用于我国电力市场模式以及建成一个可以成熟运行的现货市场提供...     

Using Followership to Develop New Leadership in Cultures with Greater Power Distance

Leadership theories abound in individualistic societies with the promise that anyone can become a successful leader by following certain guidelines. However, many of our existing theories are culturally specific to individualistic societies with low power distance. People from more collectivist cultures, in which power distance is greater, have a very different perspective of what they can do. In the current paper, I discuss how followership can be helpful for empowering people in large power distant cultures and offer five strategies, using Honduras as an example. The strategies are based on a theoretical examination of basic followership concepts with Hofstede's cultural dimensions of power distance and collectivism (Hofstede, Hofstede, & Minkov, 2010).     

高压电器中的开关设计分析

在电力系统中,接地开关是最重要的电力设备之一。现在,快速接地开关作为非常重要的电器设备,已经在电力系统有很多的应用。本文主要是简单的介绍了隔离开关、接地开关和快速接地开关,并探讨了接地、快速接地开关的设计以及一种用于高压电器的快速接地开关,可以作为以后新型接地开关设计的参考。     

论房屋拆迁立法中权力与权利平衡机制的构建

房屋拆迁在一定意义上就是行政权力与权利的博弈,而我国当前房屋拆迁立法存在权力与权利的严重失衡现象.建立和谐有序的拆迁制度必须从约束行政权力、释放权利入手,探求二者之问力量的平衡机制.基于此,以当前拆迁立法权力与权利配置处于失衡态势的基本判断为前提,根据区分原则提出公共利益需要、一般商业开发与成片旧城改造引起的三种房屋拆迁类型下,应当分别采取行政征收、行政登记和行政许可的行政权力介入模式,同时,构建了不同拆迁模式下行政权力与权利的平衡机制.     

Design considerations for neyman-pearson and wald hypothesis testing

Summary The Neyman-Pearson Lemma describes a test for two simple hypotheses that, for a given sample size, is most powerful for its level. It is usually implemented by choosing the smallest sample size that achieves a prespecified power for a fixed level. The Lemma does not describe how to select either the level or the power of the test. In the usual Wald decision-theoretic structure there exists a sampling cost function, an initial prior over the hypothesis space and various payoffs to right/wrong hypothesis selections. The optimal Wald test is a Bayes decision rule that maximizes the expected payoff net of sampling costs. This paper shows that the Wald-optimal test and the Neyman-Pearson test can be the same and how the Neyman-Pearson test, with fixed level and power, can be viewed as a Wald test subject to restrictions on the payoff vector, cost function and prior distribution.     

火力发电厂汽机凝汽器安装技术探讨

凝汽器是火力发电厂汽轮机安装工程项目的重要组成部分,做好凝汽器安装工程的施工项目管理,才能形成完整的火力发电厂汽轮机安装工程项目整体安装,才能实现火力发电厂汽轮机安装项目的重要合同目标。     

火力发电厂汽机凝汽器安装技术探讨

凝汽器是火力发电厂汽轮机安装工程项目的重要组成部分，做好凝汽器安装工程的施工项目管理，才能形成完整的火力发电厂汽轮机安装工程项目整体安装，才能实现火力发电厂汽轮机安装项目的重要合同目标。     

大规模风电接入技术研究

由于风电具有随机性、间歇性的特点,大规模接入会对电网产生不可忽略的影响。本文从风电并网对系统的影响入手,分别剖析了风电并网对系统调峰调频、对无功平衡和电压水平、对电网稳定性、对电能质量四个方面的影响,并提出了相应的可行性解决措施。     

Organizational political climate: Shared perceptions about the building and use of power bases

Organizational politics continues to be acknowledged as a real and important dimension of organizational functioning. Most research has focused on ‘perceptions of organizational politics’ where organizational politics is conceptualized negatively and its relationship with detrimental individual and organizational outcomes is demonstrated. We argue that organizational politics can be conceptualized as a multi-dimensional climate level construct and that ‘organizational political climate’ can be both functional and dysfunctional. We propose and explain a four dimensional model of organizational political climate informed by existing theoretical perspectives on power bases. The four key dimensions are represented by the building and use of personal power, positional power, connection power and informational power. We also highlight the need for a comprehensive measure of organizational political climate which is underpinned by the four dimensions and which enables an assessment of the extent to which the organizational political climate is functional and/or dysfunctional. In summary, we recommend that HR practitioners seek to understand the functional and dysfunctional dimensions of organizational political climate and implement practices to foster a positive political climate. We overview practical implications for HR managers and suggest a future research agenda.