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1.
220kV变电站总平面布置的优化设计   总被引:2,自引:0,他引:2  
文章通过工程实例,阐述如何对变电站进行总平面布置优化工作,综合各方面的因素设计出合理的总平面,使整个总平面布置在满足规划及各相关专业要求的前提下,尽量做到减少占地面积,利于线路出线,方便运行及维护变电站.  相似文献   

2.
通过工程实例,阐述如何在不规则及有限的地块内进行变电站总平面布置,使整个总平面布置在满足规划及各相关专业要求的前提下,尽量做到减少占地面积,方便运行及维护。  相似文献   

3.
通过工程实例,阐述如何在不规则及有限的地块内进行变电站总平面布置,使整个总平面布置在满足规划及各相关专业要求的前提下,尽量做到减少占地面积,方便运行及维护。  相似文献   

4.
林琳 《价值工程》2011,30(33):70-70
本文从站址选择及总平面布置、建筑、结构、屋外构支架、场地、水工及暖通等方面介绍了目前变电站土建设计中常用的一些优化设计和创新设计理念,为今后变电站优化设计提供了一定的参考。  相似文献   

5.
近年来,我国国民经济飞速发展,国家电网建设不断增强,电力体制改革力度也随之越来越大。变电站的设计在一定程度上决定着电力系统的工作质量与进度。文章结合作者多年的变电站设计经验,探讨了35kV变电站设计,从电气主接线设计、设备平面布置、变电站综合自动化等方面展开论述和探讨,并提出建议。  相似文献   

6.
为了顺应经济社会和电网发展的新形势,解决配电网发展中日益突出的矛盾,转变配电网发展方式是所做出的一项战略性决策。文章根据变电站主接线、平面布置、电气设备选择等内容,根据实际情况,提出了110/20kV变电站电气一次设计方案。  相似文献   

7.
《山东企业管理》2009,(11):I0001-I0002
广饶县供电公司是一个承担着全县工农业生产和城乡居民生活供电任务的国有中型企业。现有员工515人,下设职能部室11个,乡镇供电所10个。截至目前,公司拥有35千伏及以上变电站33座,总变电容量134.7万千伏安,其中110千伏变电站11座,35千伏变电站22座,35千伏及以上输电线路413.139千米,10千伏配电线路1619.996千米。交电站全部实现了双电源、双主变供电。  相似文献   

8.
介绍了如何应用SLP法,进行化工厂总平面布置设计的过程──基本要素分析、物流分析、作业单位之间非物流相互关系分析、总平面布置等。  相似文献   

9.
曾亮 《企业技术开发》2010,29(4):103-103,112
文章针对变电站中二维设计的平面性及局限性,引出在变电站中更加直观且更利于各专业配合的三维设计。阐述了利用PDMS实现变电站中的三维模拟设计,通过实例给出了模拟设计及三维漫游的关键步骤,实践结果表明.三维设计是以后电力设计手段改革的行之有效的解决方案。  相似文献   

10.
《江苏企业管理》2014,(8):48-48
苏州供电公司是江苏省电力公司所属特大型供电企业.营业区辖苏州常熟、张家港、太仓、昆山4个县级市和姑苏、吴中、相城、吴江、工业园区、高新区(虎丘区)等6个区,拥有营业客户400.72万户。苏州电网拥有35千伏及以上变电站465座.变电总容量84693万千伏安。其中,500千伏变电站(开关站)9座;220千伏变电站79座。35千伏及以上输电线路(含电缆)1170条,总长10557.15公里。  相似文献   

11.
The main purpose of this study is to investigate the relationship between the quality of corporate governance policy and the firm financial performance and. Data were collected from Corporate Library. A sample of 3,068 firms from the database of 2010 Corporate Library was analyzed. Logistic regression models were employed and SPSS statistical package was utilized to perform the analysis. Our results show that when firms have better corporate governance policies, they are more likely to perform better. Specifically, when firms have a better board rating, compensation policy, takeover defense strategy, accounting practice, and a formal governance policy, they are more likely to perform better than their counterparts without such quality corporate governance policies.  相似文献   

12.
张晓飞 《价值工程》2013,(31):133-134
为了更好的贯彻"安全第一、预防为主"的方针,避免企业内部损失及人员伤亡,针对建筑施工安全管理所存在的问题做出一系列相关措施,以此来更有效地解决安全管理问题。  相似文献   

13.
赵华  李莉  张英姿 《价值工程》2011,30(18):14-14
经过多年的发展,我国的物流业已经形成了一定的规模,信息技术水平逐步上升,服务质量越来越好。但从总体上看,我国物流大多数还处在一个较低的水平。以山东为例,物流通过选择模式来促进更好的发展也变得越来越重要。  相似文献   

14.
This study examines the performance of managers over time, as well as its persistence, taking into account both manager characteristics and market conditions. Applying parametric and non-parametric methodologies, we examine a sample of UK equity pension fund managers. Our results help to understand the importance of manager assignments in the industry and reveal the importance and benefits of management specialization. We find certain manager performance persistence, revealing that some managers are better than others and possess superior investment skills. Additionally, we find that managers achieve better results when they run a single fund or one investment-objective funds, which allows managers to focus on specific tasks. Nonetheless, manager performance varies with market conditions and highlights managers’ different skills. Specialist managers perform better in bullish markets, and generalists perform better in bearish periods.  相似文献   

15.
传统的因子分析模型,公因子解不能降维或失去一些变量解释,故因子分析需要找出一个优良模型。而优良模型的确定需要更好的量化优良性准则,为此本文用因子分析的基本思想和目的,提出因子分析降维性、解释性、拟合性更好的量化优良性准则,并证明有目标函数最大化的因子分析模型L是因子分析的一个优良模型和方法。实证表明,因子分析模型L具有优良性,传统因子分析模型的最大似然法、主因子法误差较大。  相似文献   

16.
《Economic Systems》2022,46(4):101006
This paper examines the effect of gender diversity on the financial performance of firms in India. Specifically, we examine two specific aspects of gender diversity- how the implementation of gender diversity across various workforce levels affects firm performance and the role of gender norms and culture in the external environment where the firm operates in influencing the relation. Using the World Bank Enterprise Survey, 2014, we use propensity score matching and instrumental variable estimation techniques to test the effect of gender diversity on firm performance. The results suggest that better women’s representation at higher levels of the workforce is associated with better performance. In contrast, women’s representation at the worker level of the workforce does not affect performance. Additionally, the state-level gender empowerment norms strongly condition the effect of gender diversity on performance. In states with better gender empowerment indicators, firms with better female representation at all levels of permanent employment also have better performance. In contrast, there is no effect of gender diversity on performance in states with worse women empowerment indicators.  相似文献   

17.
Using the PSID Child Development Supplement (CDS) and the corresponding PSID main data sets, we examine whether home ownership has positive effects on the academic achievement of children after correcting for selectivity bias and controlling for home environment, neighborhood quality, residential stability, and income. While we find no independent effects of home ownership, there are positive significant effects of home environment, neighborhood quality, and residential stability on the reading and math performance of children between the ages of three and twelve. The main policy implication of our study is that improvement of a child's home environment, residential stability, and the quality of the neighborhood is more important than ownership of a home to achieve better child outcomes. Subsidized home ownership can lead to better child outcomes to the extent that it places a child in a better home environment, in a more stable residence, and in a better neighborhood.  相似文献   

18.
This paper compares the mixed-data sampling (MIDAS) and mixed-frequency VAR (MF-VAR) approaches to model specification in the presence of mixed-frequency data, e.g. monthly and quarterly series. MIDAS leads to parsimonious models which are based on exponential lag polynomials for the coefficients, whereas MF-VAR does not restrict the dynamics and can therefore suffer from the curse of dimensionality. However, if the restrictions imposed by MIDAS are too stringent, the MF-VAR can perform better. Hence, it is difficult to rank MIDAS and MF-VAR a priori, and their relative rankings are better evaluated empirically. In this paper, we compare their performances in a case which is relevant for policy making, namely nowcasting and forecasting quarterly GDP growth in the euro area on a monthly basis, using a set of about 20 monthly indicators. It turns out that the two approaches are more complements than substitutes, since MIDAS tends to perform better for horizons up to four to five months, whereas MF-VAR performs better for longer horizons, up to nine months.  相似文献   

19.
周泽骏 《价值工程》2011,30(10):78-79
从固定总价合同的定义、特点及局限性、纠纷以及风险防范的建议几个方面阐述、分析了招投标过程中固定总价合同的应用,使业主能较好的管理工程,承包人能较好的获得经济效益。  相似文献   

20.
Rather than legal enactment and collective bargaining being the main engines of the ‘Europeanisation’ of industrial relations, benchmarking and ‘soft’ forms of regulation are increasingly to the fore. This article traces the origins of benchmarking from management tool to regulatory instrument, in particular analysing its functioning at the levels of the Euro–company, Euro–sector and the Community itself. Without better processes, better data and better implementation, the paper concludes, benchmarking is likely to prove no more effective a means of co–ordination than the traditional Community method.  相似文献   

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