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电力可靠性管理涉及电力生产过程的规划设计、工程施工、运维检修等关键环节,只有在前期规划设计中充分考虑中期配电网施工建设、停电计划和后期的运维检修工作,实施配网规划设计、施工建设、运维检修全过程管路,才能从规划设计的关键环节来保证配电网的供电可靠性。 相似文献
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1建立供电可靠性领导小组,完善管理网络,提高可靠性管理水平1.1把供电可靠性管理工作作为企业工作的重点,定期召开管理分析会,制定可靠性管理工作计划。同时明确各科室在可靠性管理工作中的标准和职责,充分发挥各部门管理人员的积极性和创造性,保证供电可靠性目标的实现。1.2认真学习贯彻新规程,培训可靠性管理人员,为分析可靠性指标、计划检修、故障停电和重复性停电等问题打好基础。1.3加强基础资料管理和完善。为编制运行方式、计划检修和制定有关生产管理措施提供翔实、准确的依据,同时为电网可靠性评估提供计算依据。1.4各部门要互相协… 相似文献
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随着企业和居民用户对供电可靠性需求提升,配网不停电作业已逐渐替换传统计划停电作业成为配电网线路设备主流检修手段。通过旁路作业法带负荷更换或安装开关、跌落式熔断器等设备是配网不停电作业常规复杂作业项目,电网企业各基层单位广泛开展该项作业。文章针对现场实际作业中发现的旁路系统分流异常问题开展分析,提出此类作业须注意问题和应采取措施,保障旁路作业安全有序开展。 相似文献
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配电网作为输送和分配电能的末端环节,直接关系到广大用电客户的安全用电。同时,该网络具有拓扑结构复杂、覆盖区域大、检修维护工作多等特点,当该网络发生永久性故障时,就会直接影响客户的正常生产和生活,配电网可靠性管理因此成为配电线路安全运行的的重要组成部分。本文以当前复杂运行环境下的配电网为研究对象,通过对可靠性数据的统计分析,以有效防范可能发生的自然灾害、各类人为外力破坏等不安全运行因素为目标,提出针对性的提升可靠性措施,为配电网的安全供电提供管理依据,强化配电网可靠性管理。 相似文献
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随着各行业及居民对供电可靠性和供电质量的要求越来越高,如何提高配网设备的运行和管理水平,迅速处理事故,减少停电时间和缩小停电范围,是供电部门亟待解决的问题。配电系统自动化是利用现代电子计算机、通信及网络技术,将配电网在线数据及离线数据和客户数据、电网结构和地理图形进行信息集成,构成完整的自动化系统,实现配电网及其设备正常运行及事故状态下的监测、保护、控制、用电和配电管理的现代化。1配电自动化建设应避免的误区 相似文献
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1创新背景随着我国全社会对供电可靠性要求的不断提高,对配电网提出了不停电作业的要求,以“能带不停”为原则的电网维护方式在日常检修、紧急抢修及抗灾抢修中越来越常见,其中又以旁路作业复杂性及综合性最高。旁路作业是指采用旁路系统将待检修线路隔离,并持续供电的作业方式。当10 kV架空配电线路的某处存在缺陷、故障,不得不停电检修或更换设备等,可应用旁路系统在现场组装足够长度的临时旁路供电线路,跨接检修段架空线路两端的线路,将待检修线路短接,继续向用户不间断供电,从而确保检修时用户不停电,提高供电可靠性。 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献