基于回路分析的含分布式电源配电网简化潮流计算

文章结合回路分析,针对含分布式电源配电网简化的相关问题,提出一种有效的含分布式电源配电简化潮流计算方法,并立足于回路分析法,结合配电网的实际情况,对配电网各节点电压方程进行简化,使其能直接转化为线性代数方程,更好的适用于电源配电网计算与管理,具有较高的应用价值。     

分布式电源对配电网的影响探究

分布式电源在配电网方面缺乏相应的支撑技术,文章研究了各类分布式电源对配电网的运行造成的影响,针对其结果,从分布式电源的运行以及接口进行分析,从而得到不同影响的原因;针对分布式电源对配电网造成影响条件的不同,对影响进行可靠性评估,并在此基础上提出相应的解决措施。     

浅谈分布式电源的配电网规划与优化运行

近年来国家大力发展清洁能源,分布式电源规模快速增长。由于大量分布式电源接入城市配电网,给城市配电系统造成一定的影响。配电网在建设过程中,需要综合考虑到分布式电源接入情况,从而合理规划配电网,确保配电网系统的安全性和可靠性。本文简单概述了分布式电源以及分布式电源对配电网规划的影响,并在此基础上采用计算机仿真得出,邻域搜索算法在优化分布式电源配电网效果明显。     

基于反向思维进化算法的分布式电源选址和定容

以含分布式电源配电网规划为研究对象,提出一种反向思维的进化算法,对配电网规划中分布式电源的选址和定容进行优化。建立了含分布式电源配电网规划模型,利用Matlab仿真工具对所提算法进行了仿真,算例仿真结果表明,本算法全局搜索能力较强,收敛速度较快,可适用于配电网的规划优化。     

分布式电源接入配电网电流保护研究

分布式电源在接入配电网的同时也会对电力系统的实际运行造成一定的影响,而其对于配电网继电保护的影响尤为突出,因此,必须对配电网保护进行一定的调整与改进,才能够符合分布式电源的接入要求。文章首先分析了分布式电源接入配电网后对电流保护的影响,并以分布式电源接入点不在母线位置的情况为例,提出了配电网电流保护方案。     

浅析分布式电源接入对配网的影响

随着新能源的开发利用，分布式电源接入配电网的规模越来越大，其对配电网的影响必将越来越大，本文从分布式电源的特点入手，比较浅显地分析了其对配电网的影响。     

基于源荷电压的主动配电网运行分析

针对传统配电网优化决策中鲜有计及电压响应特性的不足,考虑电压特性对配电网中源荷功率平衡方式以及潮流分布的影响,提出了一种考虑源荷电压特性的主动配电网优化运行方法。以配电网购电成本最小为目标,以无功补偿容量、分布式电源功率有功、无功功率为决策量,构建考虑源荷电压特性的主动配电网运行优化模型,并基于GAMS优化平台选用CONOPT求解器对所提优化模型予以求解。最后,通过实际41节点配电系统及PG&E 69节点配电系统算例验证了所提考虑源荷电压特性的主动配电网运行优化方法的有效性和优越性。     

含分布式电源的低压配电网设计

目前,随着智能电网的不断优化,分布式电源取得较大的发展,配电系统中接入了越来越多的分布式电源,这在一定程度上影响了配电网的设计。文章针对含分布式电源的低压配电网设计相关问题进行分析和探究,首先介绍了分布式电源的概念,然后阐述了分布式电源接入配电系统对低压配电网设计的影响,并对含分布式电源的低压配电网设计相关知识进行探讨。     

分布式电源对配电网过电压的影响分析

由于分布式发电装置的应用,配电网逐渐变为有源环网,为电力系统安全运作设定了更高标准。文章简要分析了分布式电源对配电网过电压产生的影响,通过电磁暂态仿真软件对变电站的配电网实行了分析验证,且对其过电压水平实行对比研究。试验结论反映,分布式电源的种类和容量、负荷能力和参变量对过电压的作用较大。     

关于分布式发电对配电网继电保护影响的分析

分布式发电是一种新型、经济、高效的发电技术,在接入配电网之后对电网系统继电保护会产生较大的影响。随着科学技术的发展,这种技术也得到了飞速发展,然而大量的分布式发电的接入造成电力系统由传统单一的供电模式转变成为遍地分布和互联网相串联的网络结构,促使电网在社会发展潮流中从根本上发生变化。本文针对传统单电源防渗是配电网络特点分析,研究了分布式发电对配电网继电保护的影响,进而为同行工作提供参考。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。