变电站综合自动化改造项目过程管理与研究

以变电站综合自动化改造项目为例,分析了对变电站综合自动化改造项目进行过程管理的必要性,同时对变电站综合自动化改造项目过程管理体系进行了探究,并提出了自己的建议,旨在进一步优化变电站综合自动化改造项目的过程管理,确保人们生产生活中的正常用电需求。     

110kV综合自动化变电站的改造分析

当今时代,信息技术和智能技术发展迅速。随着智能电气设备和光电互感设备的出现,变电站设计和运行技术水平也在提高。新的设计标准和制造规范的出台,促进了变电站的数字化和自动化改造,变电站进入了自动化阶段。然而,110kV综合自动化变电站改造技术还不够成熟,变电站的数字化水平也有待于进一步提高。本文着重探讨110kV综合自动化变电站改造过程中涉及到的技术措施和技术规范,并分析进一步改造110kV综合自动化变电站的方法。     

110kV综合自动化变电站改造相关问题

变电站综合自动化是电网调度自动化的实施基础,并在电力部门的生产和发展中发挥着重要的价值,基于此,从110 kV综合自动化变电站目前在改造中所存在的问题和特点出发,对110 kV综合自动化变电站改造中所涉及的问题进行了分析与探讨,以保证居民用电的稳定性。     

220kV变电站改造工程的继电保护装置选型探讨

220kV老旧变电站逐步实施综合自动化改造,需要改进变电运行管理模式,提高设备自动化水平,进一步夯实安全生产基础。结合变电站综合自动化系统改造中的问题,详细阐述了继电保护装置选型中应遵循的原则和注意的问题。     

35kV变电站自动化系统及继电保护探究

随着自动化技术的快速发展,变电站也逐渐实现了自动化。在变电站中,继电保护至关重要。本文通过35kV变电站自动化系统及继电保护原理分析,提出了针对35kV自动化变电站继电保护对策,旨在为广大一线人员提供参考。     

浅谈发电厂的电气综合自动化系统

目前发电厂升压站监控系统进行综合自动化改造是一种趋势，但是相对变电站综合自动化要复杂一些。文章论述了电厂传统监控系统存在的问题以及发电厂电气综合自动化系统的基本结构和实现方式。     

非洲某城市电网建设改造的技术发展对策

针对非洲国家安哥拉共和国罗安达市城市电网存在的诸多问题,如电网结构薄弱、电能质量较差、线损过高等.提出了后期改造期间应采取的主要技术对策.强调了要重点考虑调度自动化、配网自动化、变电站自动化的建设.     

对变电站综合自动化系统及其技术应用研究

近年来,随着计算机技术的发展,变电站综合自动化系统广泛使用,推动了电力系统计算机自动化技术的发展,变电站综合自动化技术也日趋完善。本文在深入分析我国变电站综合自动化结构模式及发展阶段的基础上,提出了其发展趋势,以期推动我国变电站综合自动化的发展。     

某机场10kV变电站综合自动化系统的优化升级

介绍厦门机场10kV变电站综合自动化系统应用的几个发展阶段及升级改造,对系统在使用过程中所暴露出的缺陷进行分析、改进、优化。     

浅谈变电站综合自动化系统

本文简单的介绍了变电站综合自动化功能由电网安全稳定运行和变电站建设、运行维护的综合经济效益要求所决定,是电力系统发展的趋势与要求。变电站自动化系统有不同的功能,通过对超高压变电站自动化系统中集中模式、相对分散模式、分层分布分散模式等主要结构模式的介绍,在模式化方案实施的基础上,对超高压变电站自动化系统在以后的发展模式再作探讨。并关于变电站自动化系统选型中存在的若干问题和应遵循的原则,阐述了变电站自动化系统的结构形式、功能等内容。     

震损钢筋混凝土结构减震加固研究进展

震损钢筋混凝土结构如何考虑损伤影响以进行减震加固设计是值得研究的问题。本文介绍了国内外相关建筑加固与减震设计的系列标准规范,基于震损结构的各种加固工况探讨了减震加固技术的适用范围,概括了国内外有关消能减震加固技术的发展及其应用于震损结构加固的研究现状,简述了灾后震损结构进行减震加固的几种设计方法,并列出了部分典型的减震加固工程实例。最后,在已有研究的基础上,指出了现阶段震损结构减震加固研究中仍存在的一些问题。     

Elaboration of energy saving renovation measures for urban existing residential buildings in north China based on simulation and site investigations

It is necessary to determine whether to implement a retrofit measure or not based on its energy saving and economic benefits, when conducting a retrofit project. The common way to do that is to set up a building simulation model and calculate its energy saving and economic benefits. Because of the great discrepancy between the actuality and the building simulation model, it is very important to use the factual energy use to calibrate the model, so as to accurately predict the benefits of retrofit measures. Although the energy efficiency retrofit of residential buildings in north China is implemented in a large scale, it seldom knows whether the commonly used retrofit packages are optimized. Therefore, a typical residential building is selected in Beijing, and the energy saving and economic benefits of different retrofit measures are analyzed using a simulation model calibrated with its actual space heating energy use, and the optimized retrofit packages are put forward. Results shows the retrofit of space heating system is a very attractive measure due to its relatively low investment but good energy saving benefit, and roof retrofit is also cost effective, while window retrofit and wall retrofit are not economic to conduct separately. Four optimized retrofit packages are figured out to realize the 50% and 65% reductions of space heating intensity required in the energy efficiency standards, which have less investment costs compared with currently widely used packages, and the retrofit packages for the 65% reduction is more cost-effective than the packages for the 50% reduction.     

合肥市某既有办公楼节能改造及能耗模拟

简要介绍了既有建筑现状和改造要点,运用能耗模拟软件DesignBuilder对合肥市某办公楼建筑改造前后的全年建筑能耗进行模拟,分析各项节能措施的节能改造效果。计算和分析结果表明,经过围护结构、照明系统及空调系统综合改造后,建筑全年能耗比既有建筑能耗降低了33．38％,二氧化碳排放量大大减少。     

"节约型社会与防水"系列报道之十:节能型屋面翻新防水系统

介绍了壳牌Flintkote屋面翻新防水系统的特点、施工和应用案例，指出随着旧屋面翻新工程的逐渐增多．这种屋面系统将得到较广泛的应用。     

地源热泵在冷热源改造中的应用

通过对某冷热源改造工程应用地源热泵的研究,阐述了地源热泵系统的设计步骤、设计方法以及设计方案。为同类冷热源的节能改造提供可借鉴的经验。     

The retrofit of industrial air-conditioning system on energy efficiency and emission reduction

According to the requirement of Chinese National Policy of energy efficiency and emission reduction, optimized retrofit on the air-conditioning system of existing building is not only a measure to improve the building energy efficiency but also an important part to implement the emission reduction. This article put forward pertinent retrofit schemes after conducting analysis on the air-conditioning system of an industrial enterprise. With comparing the feasibility and the prospective effect of each retrofit scheme, the better one was determined.     

Displacement-restraint bracing for seismic retrofit of steel moment frames

This paper presents a seismic retrofit method using wire rope (cable) bracing for steel moment-resisting frames. The retrofitted frame using the proposed bracing system exhibits ductile behavior and maintains seismic energy dissipation capacity to the same extent as the original bare frame. The bracing member does not act for small and medium vibration amplitudes. For large vibration amplitudes, the bracing member acts and restrains unacceptably large story drift. This retrofit method prevents an increase in the column compression force resulting from the brace action. Cyclic loading test results of the portal frames reveal fundamental characteristics of the proposed bracing system. Seismic response analyses are also conducted for the three-story moment-resisting frames. The effectiveness of the retrofit method is discussed in light of these test and analysis results.     

Seismic retrofit design and risk assessment of an irregular thermal power plant building

Electric power system is one of essential lifeline systems for an urban community. An actual power plant building with typical coal‐fired power generation process is selected to be studied in this paper. The detrimental impacts on the seismic performance of the structural system induced by heavy coal bunkers and irregular bracing configurations are expected to be mitigated by using retrofit strategies. A total of three retrofit design schemes that employ the isolation and supplemental damping techniques are developed. The original design scheme of the actual thermal power plant building that adopts steel special concentrically braced frame as lateral‐force resisting system is used as benchmark for comparison purposes. Nonlinear response‐history analyses are performed, and the obtained seismic responses are compared. To better quantify the benefit of the considered retrofit strategies, seismic risk in terms of probabilities of exceeding designated damage states as well as the downtime are analyzed. For the studied thermal power plant building, the results show that the added damping system is more effective in seismic risk reduction than the isolation for heavy coal bunkers. Compared to the original structural system design, the use of supplemental damping system cut the downtime of the thermal power plant building at most 42%.     

西安地区既有建筑节能改造初探

概述了西安地区既有建筑的能耗现状和相关政策法规,结合西安地区气候特点,提出了对西安地区既有建筑节能改造的要点和措施,重点分析了外围护结构、空调系统、照明系统的改造以及绿色能源的利用情况,为西安地区既有建筑节能改造提供了科学依据和技术参考。     

办公建筑空调制冷系统节能改造分析

本文针对某办公建筑空调制冷系统存在的水力不平衡、冷冻水和冷却水供回水温差过小等问题,采用改进冷水系统水力平衡、增加冷冻水泵和冷却水泵的变频调节、冷水机组优化控制、冷却塔台数调节等措施,对某办公建筑的空调制冷系统进行了节能改造。分析可知,该系统全天运行模式的平均节能率达到了26.3%,节能改造工程1.5 a后即可收回投资成本。